Landing & Drill String CATALOG

Transcription

1 Landing & Drill String CATALOG

2 With international advanced technology, sophisticated equipment and excellent management, Enerserva manufacturing facility of landing string and drill string provides high quality drilling tools and satisfactory services, including a comprehensive range of Landing string, Drill Pipe, Drill Collar, Heavy Weight Drill Pipe, Kelly as well as sour service and non-magnetic drilling tools. Moreover, we also have researched and developed DS, DSHT UT series double shoulder connections with self-owned intellectual property rights and have been taking the leading position in producing PAC, AOH, H90 and other compatible premium threads. The products are widely accepted and operated in North America, Central and South America, Middle East, South East Asia, Russia and Central Asia, etc. Our facility has complete quality management system with ISO 9001, NS-1, API and HSE certified. Being equipped with a first-class material testing lab, we ensure each piece of our products meet or exceed the requirements for durability and performance.

3 Production Lines Upsetter for Pipe Body Japan Made Full Automatic Mechanical Upsetter 2-3/8 to 7 One heating and two pressing Uniform Transitional Zone, Fine grain size, and smooth inside & outside surface, MIU Long and smooth Pipe Body Heat Treatment Furnace Itoh Industry Co., Japan 2-3/8 through 7 Quenching /Tempering Furnace : 5Ton/hr, Quenching Maximum Temperature: 950 degree; Tempering: 750 degree (Controlled within -/+ 5degree) Internal Quenching System; Water Capacity max: 285ton/hr Impact Value: Minimum 100J

4 Forging and Heat Treatment for Tool Joint Fine Die Forging Machine High Impact Value: Horizontal (90J) and Longitudinal (100J) High anti-fatigue ability Continuance Walking Beam Heat Treatment Supermatic temperature control and QT time. Stable performance of each batch. No decarburation & carburizing, and little deformation. Properties Comparison Threading for Tool Joint. MORI SEIKI - Japan made Supermatic High processing precision Lathe The unique Lathe with DCG (Direct Current Generator) in the world minimize the vibration Uniform thread performance data

5 Friction Welding, DP / HWDP Assembly Izumi Industry Co., Japan made Continuous Pusher Friction Welder 2-3/8 through 7-5/8 / Automatic data recorded Coaxial shaft of welding: Maximum 1.0mm Heat Treatment on Welding Neturen Japan made Automatic control on temperature and time of heating, soaking and cooling. Heat affect area well controlled with limited coil width. Even properties and stable metal structure. Weld Zone Picture

6 Heat Treatment for Bars Japan made Gas Heating & Walking Beam Continuous HT Furnace. Size: 2-3/8 through 11 In China, only our facility is equipped with such furnace. Heat overall length by natural gas, automatically temperature controlled ±5 Deg., soaking time controlled. Various properties after HT far exceed Mid-Freq. facilities. Boring for Bars Lathe length: 30 meters. Sizes available: 2 3/8 to 14 Boring starting from both ends, central meet-up step controlled within 1.6 mm. Bore after heat treatment process avoids inner surface cracks Concentricity of the full-length bore and straightness of the bar is well controlled to extend DC s lifetime. Profile and Threading Lathe length: 30 meters. Sizes available: 2 3/8 to 14 Spiral, Slip and Elevator, Stress relief features Kellies, cold rolling on thread roots, cold working on slip & elevator recess.

7 High Lights: Heat Treatment Gas Heating & Walking Beam Continuous HT Furnace-- High hardenability, Stable performance, Material uniformity. Boring Bore from two ends-- Good axiality, no tolerance on thread Surface of the thread Hot phosphorization Even and thickness are well controlled, Solder ability, Anti-Galling Quality Control Thread Gauges (Stored in warehouse with Constant Temperature and Humidity)

8 XHB-3000 Digital Brinell Hardness Tester (Range of measuring: 8-650HBW) LC-200R Full-Automatic Rockwell Hardness Tester Accuracy up to 0.01HRC. ZBC2452 Computerized Automatic Metal Hammer Impact Value Tester The lowest test temperature: DX Hydraulic Pressure Servo Tester Dual test space designed for tensile and bending test. Carl Zeiss Axis Image.A1 Microscope (Germany) Times of Enlargement: X Shimadzu Direct-Reading Spectrometer PDA-5500S Analyze the chemical composition efficiently and accurately.

9 CONTENTS - SECTION II I. LANDING STRING II. DRILL PIPE STANDARD DRILL PIPE SOUR SERVICE DRILL PIPE DIGITAL DRILL PIPE EFFICIENT CUTTING BED CLEAN DRILL PIPE ALUMINIUM ALLOY DRILL PIPE TRENCHLESS / HDD DRILL PIPE III. HEAVY WEIGHT DRILL PIPE IV. DRILL COLLAR DRILL COLLAR (SLICK & SPIRAL) NON-MAGNETIC DRILL COLLAR V. REAMER VI. STABILIZER INTEGRAL BLADE STABILIZER REPLACEABLE SLEVE STABILIZER NON-ROTATING STABILIZER FLOAT VALVE STABILIZER SPHERICAL STABILIZER

10 VII. KELLY (SQUARE AND HEXAGONAL) VIII. HOLE OPENER IX. DRILL STRING ACCESSORIES LIFTING SUB CROSSOVER LIFTING PLUG & CAP KELLY / TOP DRIVE SAVER SUBS ORIENTED BENT SUB DRILL BIT SUB WEAR SUB FLOAT VALVE SUB

11 I. LANDING STRING A Landing String is a heavy duty thick wall drill pipe, usually 0.500" wall or greater. It is used in many instances where regular drill pipe does not have sufficient tensile strength. A landing string can be used not only for drilling, but also to land heavy casing strings in the well or heavy equipment on the sea bed. A slip crushing resistant landing string is designed to resist to a phenomenon called slip crushing when gripped by the slips on the rotary table. Manufactured from the same grade of steel, the tensile rating directly correlates to the wall thickness. Landing String sizes include 5", 5-1/2", 5-7/8, 6-5/8", & 6-5/8" Slip Proof. Grades S-135, Z-140, & V-150. Our landing Strings offer a variety of drill pipe-based designs for non-slip crushing resistant landing strings: typically those landing strings exhibit large OD (up to 6-5/8"), proprietary high strength steel grades, and heavy wall sections (up to 0.938" wall).

12 Special Features: Higher running speed. Higher tensile and hoisting capacity. Increased elevator loading capacity. Better slip crushing resistance. OD Connection Grade Range Wall Nominal Weight TJ OD TJ ID Tube ID TJ Yield Min MUT Max MUT Prem Tube Tensile (in) (in) (lb/ft) (in) (in) (ft-lbs) (ft-lbs) (ft-lbs) (lbs) 5 NC50 S-135 II /8 2-3/4 4 63,400 31,700 38, ,442 5 NC50 V-150 II /8 2-3/4 4 63,400 31,700 38, , /2 HT55 S-135 II /8 3-1/ ,100 53,500 64,200 1,170, /2 5-1/2" FH S-135 II /8 3-1/4 4 70,700 35,400 42,400 1,170, /2 5-1/2" FH S-135 II /4 3-1/4 4 78,700 39,400 47,200 1,170, /8 6-5/8" FH S-135 II /2 4-1/ ,353 54,200 65,000 1,245, /8 6-5/8" FH S-135 III /2 4-1/ ,353 54,200 65,000 1,245, /8 6-5/8" FH V-150 III /2 4-1/ ,353 54,200 65,000 1,384, /8 6-5/8" FH S-135 II /2 4-1/ ,353 54,200 65,000 1,456, /8 6-5/8" FH S-135 II /2 3-1/ ,200 65,100 71,000 1,558, /8 6-5/8" FH V-150 II /2 3-1/ ,200 65,100 71,000 1,731, /8 DS65 V-150 II / ,000 82,600 87,600 1,731, /8 6-5/8" FH V-150 III /16 3-1/ ,500 69,500 78,000 1,944, /8 6-5/8" FH V-150 II 6-5/8 6-5/8" FH V-150 III /16 3-1/ ,500 69,500 78,000 1,944, /16 3-1/ ,741 69,500 78,000 2,189,804

13 II. DRILL PIPE Drill pipe is the top component of any drill string that makes up the majority of a drill string's length. Its functions are to transmit torque and power from the top drive or rotary table to the bit. A drill pipe is described by its size, weight, grade, connection, upset, range and class. We manufacture and supply a full range of friction welded drill pipes in nominal sizes from 2-3/8" to 6-5/8" and a wide range of wall thickness. On our drill pipes, we adopts a strict quality control policy to ensure total quality control from initial material qualification, in-process inspection to final out-going quality inspection. We are confident that our each joint of drill pipes meets your needs for reliability, durability and performance during your drilling operations. 2.1 Standard Drill Pipe Tool Joint Parameters TJ Designation NC26 2-3/8IF NC31 2-7/8IF NC38 3-1/2IF Nominal Conn. Weight Grade Pin / Box Bevel Dia., Pin / Total Length, Pin Tong Box Tong Pin ID OD Box Shoulder Tool Joint Pin Space Space Combined Box Dia. At Pin Dia. At Length, Pin/Box Elevator Upset Elevator Upset D d DF LP LPB LB L DPE DTE lb/ft in in in in in in in in in E 3-3/8 1-3/4 3-17/ /16 2-9/16 2-3/8EU 6.65 X 3-3/8 1-3/4 3-17/ /16 2-9/16 G 3-3/8 1-3/4 3-17/ /16 2-9/16 E 4-1/8 2-1/8 3-61/ / /16 3-3/16 X 4-1/ / / /16 3-3/1 2-7/8EU 10.4 G 4-1/ / / /16 3-3/16 S 4-3/8 1-5/8 3-61/ / /16 3-3/ E 4-3/4 2-11/ / / /2 18-1/2 3-7/8 3-7/8 E 4-3/4 2-11/ / /2 18-1/2 3-7/8 3-7/8 X 5 2-9/ / /2 18-1/2 3-7/8 3-7/ G 5 2-7/ / /2 18-1/2 3-7/8 3-7/8 3-1/2EU S 5 2-1/8 4-37/ /2 18-1/2 3-7/8 3-7/8 E 5 2-9/ / /2 18-1/2 3-7/8 3-7/ X 5 2-7/ / /2 18-1/2 3-7/8 3-7/8 G 5 2-1/8 4-37/ /2 18-1/2 3-7/8 3-7/8

14 TJ Designation Conn. Nominal Weight Grade Pin / Box OD Pin ID Bevel Dia., Pin / Box Shoulder Total Length, Tool Joint Pin Pin Tong Space Box Tong Space Combined Length, Pin/Box Box Dia. At Elevator Upset Pin Dia. At Elevator Upset D d DF LP LPB LB L DPE DTE lb/ft in in in in in in in in in 3-1/2EU 15.5 S 5-1/2 2-1/4 5-1/ / /8 3-7/8 NC40 4FH NC46 4IF NC50 4-1/2IF NC50 5-1/2IF E 5-1/4 2-13/16 5-1/ / /16 4-3/16 X 5-1/4 2-11/16 5-1/ / /16 4-3/16 4IU 14 G 5-1/2 2-7/16 5-1/ / /16 4-3/16 S 5-1/ / / /16 4-3/16 E 6 3-1/4 5-23/ / /2 4-3/16 X 6 3-1/4 5-23/ / /2 4-3/16 4EU 14 G 6 3-1/4 5-23/ / /2 4-3/16 S / / /2 4-3/16 4-1/2IU E 6 3-3/8 5-23/ / / /16 E 6-1/4 3-1/4 5-23/ / / /16 X 6-1/ / / / /16 4-1/2EU 16.6 G 6-1/ / / / /16 S 6-1/4 2-3/4 5-23/ / / /16 E 6-1/ / / / /16 4-1/2IE X 6-1/4 2-3/4 5-23/ / / /16 U 20 G 6-1/4 2-1/2 5-23/ / / /16 S 6-1/4 2-1/4 5-23/ / / /16 E 6-5/8 3-3/4 6-1/ / E 6-5/8 3-3/4 6-1/ / X 6-5/8 3-3/4 6-1/ / G 6-5/8 3-3/4 6-1/ / /2EU S 6-5/8 3-1/2 6-1/ / E 6-5/8 3-5/8 6-1/ / X 6-5/8 3-1/2 6-1/ / G 6-5/8 3-1/2 6-1/ / S 6-5/ / / E 6-5/8 3-3/4 6-1/ / /8 5-1/8 X 6-5/8 3-1/2 6-1/ / /8 5-1/ G 6-5/8 3-1/4 6-1/ / /8 5-1/8 5IEU S 6-5/8 2-3/4 6-1/ / /8 5-1/8 E 6-5/8 3-1/2 6-1/ / /8 5-1/ X 6-5/ / / /8 5-1/8 G 6-5/8 2-3/4 6-1/ / /8 5-1/8

15 TJ Designation Conn. Nominal Weight Grade Pin / Box OD Pin ID Bevel Dia., Pin / Box Shoulder Total Length, Tool Joint Pin Pin Tong Space Box Tong Space Combined Length, Pin/Box Box Dia. At Elevator Upset Pin Dia. At Elevator Upset D d DF LP LPB LB L DPE DTE lb/ft in in in in in in in in in E 7 3-3/4 6-23/ /8 5-1/8 X 7 3-3/4 6-23/ /8 5-1/ G 7 3-3/4 6-23/ /8 5-1/8 5-1/2FH 5IEU S 7-1/4 3-1/2 6-23/ /8 5-1/8 E 7 3-1/2 6-23/ /8 5-1/ X 7 3-1/2 6-23/ /8 5-1/8 G 7-1/4 3-1/2 6-23/ /8 5-1/8 5-1/2FH 5IEU 25.6 S 7-1/4 3-1/4 6-23/ /8 5-1/8 E / / /16 X 7 3-3/4 6-23/ / / G 7-1/4 3-1/2 6-23/ / /16 S 7-1/ / / /16 E / / /16 X 7 3-1/2 6-23/ / / G 7-1/4 3-1/2 6-23/ / /16 S 7-1/ / / /16 E / / /16 X / / / G 8-1/4 4-3/4 7-45/ / /16 S 8-1/4 4-1/4 7-45/ / /16 6-5/8FH 6-5/8IEU E / / /16 X 8-1/4 4-3/4 7-45/ / / G 8-1/4 4-3/4 7-45/ / /16 S 8-1/2 4-1/4 7-45/ / /16

16 Drill Pipe Main Technical Parameters Drill Pipe SPECIFICATIONS Pipe Drill Pipe Tool Joint Approx Designations a Pipe wall RSC body Weld Pin OD Box OD thickness OD Pin ID bevel dia. OD Neck Length Length mass c Label1 Label2 Grade Upset RSC Ddp t Dte b D dp Lpb Lb Df Wdp Type type d mm mm mm mm mm mm mm mm kg/m % max. ± ±6.4 ±6.4 ±0.4 Calculated Internal-External Upset (IEU) 4-1/ E IEU NC / X G IEU NC / S IEU NC /2 20 E IEU NC /2 20 X IEU NC /2 20 G IEU NC /2 20 S IEU NC E IEU NC X IEU NC G IEU NC S IEU NC E IEU 5-1/2FH X G IEU 5-1/2FH S IEU 5-1/2FH E IEU NC X IEU NC G IEU NC E IEU 5-1/2FH X IEU 5-1/2FH G IEU 5-1/2FH S IEU 5-1/2FH / E IEU 5-1/2FH / X IEU 5-1/2FH / G IEU 5-1/2FH / S IEU 5-1/2FH / E IEU 5-1/2FH / X G IEU 5-1/2FH / S IEU 5-1/2FH

17 (CONTINUED) Drill Pipe SPECIFICATIONS Pipe Drill Pipe Tool Joint Approx Designations a Pipe wall RSC body Weld Pin OD Box OD thickness OD Pin ID bevel dia. OD Neck Length Length mass c Label1 Label2 Grade Upset RSC Ddp t Dte b D dp Lpb Lb Df Wdp Type type d mm mm mm mm mm mm mm mm kg/m % max. ± ±6.4 ±6.4 ±0.4 Calculated Internal-External Upset (IEU) 6-5/ E IEU 6-5/8FH / X IEU 6-5/8FH / G IEU 6-5/8FH / S IEU 6-5/8FH / E IEU 6-5/8FH / X G IEU 6-5/8FH / S IEU 6-5/8FH Drill Pipe SPECIFICATIONS Drill Pipe Tool Joint Approx Designations a Pipe-body Pipe wall RSC Weld Pin OD Box OD OD thickness OD Pin ID bevel dia. Neck Length Length mass c Label1 Label2 Grade Upset RSC Ddp t Dte b D dp Lpb Lb Df Wdp Type type d mm mm mm mm mm mm mm mm kg/m % max. ± ±6.4 ±6.4 ±0.4 Calculated Internal Upset (IU) 4 14 E IU NC X IU NC G IU NC S IU NC / E IU NC

18 Drill Pipe SPECIFICATIONS Drill Pipe Tool Joint Approx Designations a Pipe-body Pipe wall RSC Weld Pin OD Box OD OD thickness OD Pin ID bevel dia. Neck Length Length mass c Label1 Label2 Grade Upset RSC Ddp t Dte b D dp Lpb Lb Df Wdp Type type d mm mm mm mm mm mm mm mm kg/m % max. ± ±6.4 ±6.4 ±0.4 Calculated External Upset (EU) 2-3/ E EU NC / X G EU NC / E EU NC / X G EU NC / S EU NC /2 9.5 E EU NC / E EU NC / X EU NC / G EU NC / S EU NC / E EU NC / X EU NC / G EU NC / S EU NC E EU NC X G EU NC S EU NC / E EU NC / E EU NC / X G EU NC / S EU NC /2 20 E EU NC /2 20 X G EU NC /2 20 S EU NC

19 PIPE SPECS TOOL JOINT SPECS (DPTJ110SS) 2.2 Sour Service Drill Pipe (H2S) Standard: IRP1.8, NACE MR0175 / ISO Size Range: 2-3/8" ~ 6-5/8" Special Features: Strict control over the S and P content (S+P < 0.03%) Increase of the Cr, Mo content, unique heat treatment process, grain refinement. (The grain size exceeds Grade 8 standards in ASTM Standard) Compound with double shoulder high torque connection (DS, DSHT) Strict control over the intensity, rigidity and other indexes. Specification and Feature of Materials: Contents DP95SS DP105SS Chemical composition wt% S 0.005, P S 0.005, P metallographic structure tempered martensite, 95% tempered martensite, 95% Grain size ASTM E112 Grade 8 or finer ASTM E112 Grade 8 or finer Yield strength 655/758MPa(95/110KSI) 724/827MPa(105/120KSI) Tensile Strength 724/896MPa(105/130KSI) 793/965MPa(115/140KSI) Elongation % Impact Energy (7.5*10*55, -20 ) (single) 80J(59Ft-Lb) (single) 80J(59Ft-Lb) Hardness HRC Single , average 25 Single , average MPa(89.2KSI), sulfur tolerance 557MPa(80.8KSI), 85%SMYS 85%SMYS Chemical composition S 0.005, P S 0.005, P metallographic structure tempered martensite, 90% tempered martensite, 90% Grain size Grade 7 or finer Grade 7 or finer Yield strength 758/862MPa (110/125KSI) 758/862MPa (110/125KSI) Tensile Strength 862/1000MPa(125/145KSI) 862/1000MPa(125/145KSI) Elongation % Impact Energy (10*10*55, -20 ) Single 90J(66Ft-Lb) Single 90J(66Ft-Lb) Hardness HRC Single 32, Average 30 Single 32, Average 30 Sulfur Tolerance 493MPa(71.5KSI) 65%SMYS 493MPa(71.5KSI) 65%SMYS

20 2.3 Digital Drill Pipe Technical Advantages Realizing read-write for drill pipe's remote sense, reducing the probability of human error, enhancing the accuracy of management. Realizing fast efficient storage and recognition technique for drill pipe's manufacturing, using, maintaining information with the cooperation of drill pipe digital management platform. All the operation and maintenance date of each drill pipe can be preserved in time to master the use of drill pipe real-time and dynamically for easy classification management of drill pipe. So the life-cycle of drill pipe from purchase, use, maintenance, scrapping and disposition of drill pipe can be wholly controlled within a perfect digital management. Technical Parameter Chip of Digital Drill Pipe Operating Temperature -40 ~ 200 Pressure Resistance 70MPa Vibration Frequency Resistance 5Hz ~ 10Hz PH 3 ~ 14 Anti-electromagnetic interference A/m Recognition Range 0~1m Chip Recognition Speed 0.5s Chip Recognition Rate 95% Drill Pipe Recognition Rate 98%

21 2.4 Efficient Cuttings Bed Clean Drill Pipe Efficient cuttings bed clean drill pipe is designed to improve hole-cleaning performance in horizontal or complex non-conventional wells. Special Features: Cleaning efficiency improvement Cut down on well bore damage Reduce downhole failure risk 2.5 Aluminium Alloy Drill Pipe We adopt the world's leading proprietary manufacturing technology for high-strength environmental friendly aluminium alloy drill pipe used in oil & gas industry. We utilize two-way reverse hydraulic extruding machines from Germany, the largest vertical compound hardening furnace in Asia and proprietary shrinkage fitting equipment External Upset Aluminium Alloy Drill Pipe Internal Upset Aluminium Alloy Drill Pipe Integral Tool Joint Aluminium Alloy Drill Pipe

22 2.5.4 Non-Magnetic Heavy Weight Aluminium Alloy Drill Pipe Spiral Thick-walled Aluminium Alloy Drill Pipe Thick-walled Aluminium Alloy Drill Pipe 2.6 Trenchless / Horizontal Directional Drilling (HDD) Drill Pipe We adopt the world's leading proprietary manufacturing technology for high-strength environmental friendly drill pipe used in Trenchless / Horizontal Directional Drilling HDD industry.

23 Connection Thread: The threads of our landing and drill string cover all API Standard connection types and many NON-API premium connections, as listed below: Standard Connection Threads API NC / REG / FH / IF NSCC NSCC / NSCT Grant Prideco HT Series / GPDS Series / XT Series MISC. PAC / AOH Remarks: The other thread connections not listed in this sheet will be provided upon requests. MANUFACTURING PROCESS:

24 Hardbanding / Hardfacing NOV Tuboscope TCS Titanium / TCS 8000 ARNCO 100XT 150XT 300XT 350XT Welding Style Casing friendly (Flush) / Raised Internal Coating (Typically TK34 & TCS2000)

25 III. HEAVY WEIGHT DRILL PIPE Heavy Weight Drill Pipe (HWDP) is an intermediate weight drill stem component which is used in conjuction with the drill pipes and drill collars. HWDP is available in standard, spiral and non- magnetic designs. In some applications, HWDP can also be used instead of drill collars. Our facility is awarded by the API and NS-1 / DS-1 certificate, which is made from one-piece AISI 4145H modified quenched and tempered steel. It is designed for tough drilling environment in vertical and directional wells. HWDP is a transition member between drill collar and drill pipe. For directional holes, HWDP provides weight-on-bit and additional stiffness to prevent buckling. Features and Benefits: A center upset or wear pad to increase tube life, reduce hole drag and differential sticking problems. Connections are completed (phosphate coated) to protect them from the elements after machining and to help prevent galling upon initial makeup. Thread roots are cold rolled on API and H90 connections. And pressed steel thread protectors are supplied for standard connections. Hardbanding and internal coating can be provided upon customer's requests. Product range 2-7/8" ~ 6-5/8" Material AISI 4145H, AISI 1340 Type of End Finish Integral Type, Welded Type Nominal OD Approx. Weight Body OD Upset OD Upset Length Elevator Upset OD Connection Yield Strength Body Data Tool Joint Data Pin/Box Tool Tens. Tors. Tens. Tors. Recom. Type ID OD Body Length Joint Yield Yield Yield Yield MUT A B C D E F G I/H in lb/ft in in in in in in in Ksi Ksi lbs ft-lbs lbs ft-lbs ft-lbs 2-7/ /4 3-1/ /16 NC31 1-3/4 4-1/8 27/ / / /8 NC38 2-1/16 4-3/4 27/ / / /8 NC38 2-1/4 4-3/4 27/ /2 4-1/ /16 NC40 2-1/2 5-1/4 27/ / / /16 NC /16 6-1/4 27/ / /8 NC /8 27/ / / /18 5-1/2FH 3-7/8 7 27/ / /8 6-3/ /2FH / / / /16 6-5/8FH /

26 IV. DRILL COLLAR (SLICK & SPIRAL, NON-MAGNETIC) 4.1 Drill Collar Drill Collar is the basic component in the BHA which provides weight on the bit for drilling and keeps the drill string in tension. Our drill collar is manufactured from AISI 4145HM quenched and tempered steel and is heat treated along its entire length for uniform toughness and durability. Strict metallurgical tests are performed per specifications to ensure that the heat treatment produces consistent and maximum hardness through the depth of the bar. Main Technical Parameters Size Range 2-7/8" - 11" Type of End Finish Slick, Spiral Material AISI 4145HM, Non-Magnetic Connection OD Bore Dia. B.S.R. Length, Tensile Strength Hardness D d Round ±6in Yield Tensile Impact Value Elongation inch (mm) inch (mm) Number ft Strength Strength Brinnel NC /8 (79.4) 1-1/4 (31.8) 2.57:1 30 NC26-36 (2-3/8IF) 3-1/2 (88.9) 1-1/2 (38.1) 2.42:1 30 NC31-41 (2-7/8IF) 4-1/4 (104.8) 2 (50.8) 2.43:1 30 or 31 NC /4 (120.7) 2 (50.8) 2.58:1 30 or 31 NC38-50 (3-1/2IF) 5 (127) 2-1/4 (57.2) 2.38:1 30 or 31 NC (152.4) 2-1/4 (57.2) 2.49:1 30 or 31 NC (152.4) 2-13/16 (71.4) 2.84:1 30 or 31 NC /4 (158.8) 2-1/4 (57.2) 2.91:1 30 or 31 NC46-62 (4IF) 6-1/4 (158.8) 2-13/16 (71.4) 2.63:1 30 or 31 min psi ( 758Mpa) min psi ( 965Mpa) min. 13% min. 59ft lb ( 80J) NC46-65 (4IF) 6-1/2 (165.1) 2-1/4 (57.2) 2.76:1 30 or 31 NC46-65 (4IF) 6-1/2 (165.1) 2-13/16 (71.4) 3.05:1 30 or 31 NC46-67 (4IF) 6-3/4 (171.5) 2-1/4 (57.2) 3.18:1 30 or 31 NC50-67 (4-1/2IF) 6-3/4 (171.5) 2-13/16 (71.4) 2.37:1 30 or 31 NC50-70 (4-1/2IF) 7 (177.8) 2-1/4 (57.2) 2.54:1 30 or 31 NC50-70 (4-1/2IF) 7 (177.8) 2-13/16 (71.4) 2.73:1 30 or 31 NC50-72 (4-1/2IF) 7-1/4 (184.2) 2-13/16 (71.4) 3.12:1 30 or 31 NC /4 (196.9) 2-13/16 (71.4) 2.70:1 30 or 31 NC (203.2) 2-13/16 (71.4) 3.02:1 30 or /8REG 8-1/4 (209.6) 2-13/16 (71.4) 2.93:1 30 or 31 NC (228.6) 2-13/16 (71.4) 3.17:1 30 or /8REG 9-1/2 (241.3) 3 (76.2) 2.81:1 30 or 31 min psi ( 689Mpa) min psi ( 931Mpa) min. 13% min. 59ft lb ( 80J) NC /4 (247.7) 3 (76.2) 2.57:1 30 or 31 NC (254) 3 (76.2) 2.81:1 30 or /8REG 11 (279.4) 3 (76.2) 2.84:1 30 or 31

27 Features and Benefits A hardness range of 285 to 341 BHN and a Charpy impact value of 40ft-lbs are guaranteed for evenly distributed 16 points in any cross sections at environmental temperature. Connections are phosphate coated after maching to protect the threads from corrosive elements and to prevent galling upon initial make-up. Thread roots are cold rolled on API and H-90 connections. Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connection. Slips and elevator grooves can be produced upon request. Spiral Grooving In order to reduce differential pressure sticking, the surface of drill collar can be spiral-grooved. Spiral Grooved Drill Collars: Usual Sizes OD 4-3/4" 6-1/4" 6-3/4" 7-1/4" 7-1/2" 8" 10" 11" Depth of cut (in) Spiral Pitch (in) 7/32 9/32 5/16 11/32 11/32 3/8 13/32 7/16 15/32 ±1/32 ±1/16 ±1/16 ±1/16 ±1/16 ±1/16 ±3/32 ±3/32 ±3/ ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 Note 1 - Loss of weight is approximative 4%, compared to slick drill collar. Note 2 - Length of spiraled section allows reconditionning of connection. Spiral Drill Collar with Slip and Elevator Slip

28 Stress Relief Grrove & Bore Back Box Stress Relief Grooves improve bending strength of pin and box connections and, therefore durability. Stress relief grooves for box and pin are defined by API. Bore back box is a gradual reduction of internal diameter by gradually increasing material cross sectional area at critical section. This will ultimately drastically reduce stress concentration during static / dynamic loading and prevents box connections from failure. Hardbanding We provide several hardbanding materials for customer's option: Arnco 100XT, Arnco 300XT, TCS Slip and Elevator Recess Slip and elevator recesses improve downhole handling efficiency and safety. Slip and elevator recesses are machined in accordance with API 7-1. Recommended Handbanding Location Drill Collar with slip and elevator recesses (ZIP) 4" long wear pad above elevator recess. 1" long wear pad above slip recess. 10" long wear pad under slip recess. Drill Collar with slip recess: 10" long wear pad under slip recess. 4" long wear pad above slip recess. Drill Collar without slip and elevator recess: 10" long wear pad at from pin shoulder. Drill Collar OD A B R in in in in /8 9-1/2 1/4 9-3/4 8-7/8 9-1/4 1/4 9-1/2 8-5/8 9 1/4 9-1/4 8-3/8 8-3/4 1/ /8 8-1/2 1/4 8-1/2 7-3/4 8 3/ /4 7-1/2 3/16 7-3/ /4 3/16 7-1/2 6-3/4 7 3/16 7-1/4 6-1/2 6-3/4 3/ /4 6-1/2 3/16 6-3/ /4 3/16 6-1/2 5-7/8 6 1/8 6-1/4 5-5/8 5-3/4 1/ /8 5-1/2 1/8 5-3/4 5-1/8 5-1/4 1/8 4-3/4 4-1/4 4-3/8 1/8 4-1/8 3-11/16 3-3/4 1/8

29 4.2 Non-Magnetic Drill Collar Our non-magnetic drill collars are made from non-magnetic steel bars with low-strength by combining a proper chemical analysis and rotary hammer forging process with low magnetic permeability and excellent machinability. It will not interfere with the specialized directional equipment but rather will enhance the performance of the drilling operation. The non-magnetic drill collars function as a housing for the MWD tools, while at the same time provide the weight for drill string. The non-magnetic drill collars are suitable for all types of drilling including straight and directional applications. Each drill collar is fully inspected by our internal inspection department. All data obtained are recorded on the inspection certificate furnished with each drill collar. API Monogram, serial number, OD, ID, type and size of connections are stamped on the recessed mill flats. We manufacture three types of non-magnetic drill collars according to the customer's order, including Slick, Spiral and Flex Non-Mag Drill Collars. Slick Non-Mag Drill Collar Our slick non-mag drill collar provides the required weight on bit, and will not interfere with the directional drilling ability. Spiral Non-Mag Drill Collar Our spiral non-mag drill collar is designed to allow greater flow area for drilling fluids, while providing the benefits of non-mag steel for complex drilling programs. Flex Non-Mag Drill Collar Our non-mag drill collar is thinner and more flexible than standard drill collar. Their ability to make short radius turns, bend for high build angles, and pass through severe doglegs makes them ideal for use in directional and horizontal applications. Manufactured with non-magnetic steel, this drill collar is well suitable for housing MWD equipments.

30 V. ROLLER REAMER Roller Reamers are designed for reaming and stabilization in any type of formation. All parts of the tool are made of special alloy steel and heat treated fro hardness. Drilling crews can easily replace any part in the filed without using any special tools. We offer three types of cutters for different types of formation. Type A Type B Type C Hard Formation Medium to Hard Fromation Soft Formation Main Technical Parameter Hole Size (in) Thread Type (API) O.D. I.D. (mm) (mm) 6-1/8 3-1/2IF /8 4IF /8 4-1/2IF /2 4-1/2IF /8 NC /4 6-5/8REG /2 7-5/8REG /8REG /8REG /8REG /8REG /8REG

31 VI. STABILIZER 6.1 Integral Blade Stabilizer Integral Blade Stabilizer (IBS) is a one-piece rotating stabilizer which can be placed near bit or higher in the drill string. It is a one-piece structure manufactured from high strength alloy steel (non-magnetic steel optional), that prevents differential sticking of the drillstring by stabilizing the BHA and keeping drill collars and drill pipes away from the borehole wall. This reduces vibration, drill pipe whirl, and wellbore tortuosity; furthermore, the stabilization maintains drilling trajectory whether drilling straight, horizontal or directional wells. Optional Stabilizers We offer several options for IBS, in both alloy steel and non-magnetic materials. Spiral Integral Blade Stabilizer; Straight Integral Blade Stabilizer; Non-Magnetic Integral Blade Stabilizer;

32 Specification - Spiral Integral Blade Stabilizer Fishing neck Crown OD Stab Body OD Bore length Length 3-3/4 3-1/8" 1-1/4" 26" 10" 95.3mm 79.4mm 31.8mm 660mm 254mm Blade taper angle Overall Connection Top Down Length Top Down 58" NC23B NC23P 1480mm 3-3/4" 95.3mm 3-1/8" 79.4mm 1-1/4" 31.8mm 26" 660mm 10" 254mm " 1480mm NC23B 2-3/8"REGB 4-1/2" 114.3mm 3-1/2" 88.9mm 1-1/2" 38.1mm 26" 660mm 10" 254mm " 1500mm NC26B NC26P 4-1/2" 114.3mm 3-1/2" 88.9mm 1-1/2" 38.1mm 26" 660mm 10" 254mm " 1500mm NC26B 2-3/8"REGB 5-1/2" 139.7mm 4-3/4" 120.6mm 2" 50.8mm 12" 305mm " 1730mm NC38B NC38P 5-1/2" 139.7mm 4-3/4" 120.6mm 2" 50.8mm 12" 305mm " 1730mm NC38B 3-1/2"REGB 6" 152.4mm 4-3/4" 120.6mm 2" 50.8mm 12" 305mm " 1760mm NC38B NC38P 6" 152.4mm 4-3/4" 120.6mm 2" 50.8mm 12" 305mm " 1760mm NC38B 3-1/2"REGB 7-1/2" 190.5mm 6-1/2" 165.1mm 16" 406mm 72" 1830mm NC46B NC46P 7-1/2" 190.5mm 6-1/2" 165.1mm 16" 406mm 72" 1830mm NC46B 4-1/2"REGB 7-7/8" 200mm 6-1/2" 165.1mm 16" 406mm 72" 1830mm NC46B NC46P 7-7/8" 200mm 6-1/2" 165.1mm 16" 406mm 72" 1830mm NC46B 4-1/2"REGB 8" 203.2mm 6-3/4" 171mm 16" 406mm mm NC50B NC50P 8" 203.2mm 6-3/4" 171mm 16" 406mm mm NC50B 4-1/2"REGB 8-1/2" 215mm 6-3/4" 171mm 16" 406mm mm NC50B NC50P 8-1/2" 215mm 6-3/4" 171mm 16" 406mm mm NC50B 4-1/2"REGB 6-3/4" 171mm 16" 406mm 75" 1900mm NC50B NC50P 6-3/4" 171mm 16" 406mm 75" 1900mm NC50B 4-1/2"REGB (To be continued)

33 Specification - Spiral Integral Blade Stabilizer (Continued 1) Fishing neck Crown Blade taper angle Overall Connection OD Stab Body OD Bore length Length Top Down Length Top Down 12" 8" 18" 79" 6-5/8"REGB 6-5/8"REGP 304.8mm 203.2mm 457mm 2010mm 12" 304.8mm 8" 203.2mm 18" 457mm 79" 2010mm 6-5/8"REGB 6-5/8"REGB 12-1/4" 311mm 8" 203.2mm 18" 457mm 79" 2010mm 6-5/8"REGB 6-5/8"REGP 12-1/4" 311mm 8" 203.2mm 18" 457mm 79" 2010mm 6-5/8"REGB 6-5/8"REGB 14-3/4" 374mm 8" 203.2mm 18" 457mm 84" 2140mm 6-5/8"REGB 6-5/8"REGP 14-3/4" 374mm 8" 203.2mm 18" 457mm 84" 2140mm 6-5/8"REGB 6-5/8"REGB 15-1/2" 393.7mm 8" 203.2mm 18" 457mm 85" 2160mm 6-5/8"REGB 6-5/8"REGP 15-1/2" 393.7mm 8" 203.2mm 18" 457mm 85" 2160mm 6-5/8"REGB 6-5/8"REGB 16" 406.4mm 85" 2160mm 7-5/8"REGP 16" 406.4mm 85" 2160mm 17" 431.8mm 88" 2240mm 7-5/8"REGP 17" 431.8mm 88" 2240mm 17-1/2" 444mm 88" 2240mm 7-5/8"REGP 17-1/2" 444mm 88" 2240mm 92" 2340mm 7-5/8"REGP 92" 2340mm 22" 558.8mm " 2340mm 7-5/8"REGP 22" 558.8mm " 2340mm (To be continued)

34 Specification - Spiral Integral Blade Stabilizer (Continued 2) Fishing neck Crown Blade taper angle Overall Connection OD Stab Body OD Bore length Length Top Down Length Top Down 24" 32" 97" /8"REGP 609.6mm 813mm 2460mm 24" 609.6mm 32" 813mm " 2460mm 26" 660mm 32" 813mm " 2540mm 7-5/8"REGP 26" 660mm 32" 813mm " 2540mm 28" 711mm 32" 813mm " 2590mm 7-5/8"REGP 28" 711mm 32" 813mm " 2590mm 34" 864mm " 2720mm 7-5/8"REGP 34" 864mm " 2720mm 36" 914mm 36" 914mm mm 7-5/8"REGP 36" 914mm 36" 914mm mm

35 Specification - Straight Integral Blade Stabilizer Fishing Crown Blade taper angle Overall Connection OD Stab Body OD Bore neck length Length Top Down Length Top Down 6" 4-3/4" 2" 12" " NC38B NC38P 152.4mm 120.6mm 50.8mm 305mm 1760mm 6" 152.4mm 4-3/4" 120.6mm 2" 50.8mm 12" 305mm " 1760mm NC38B 3-1/2"REGB 7-1/2" 190.5mm 6-1/2" 165.1mm 16" 406mm 72" 1830mm NC46B NC46P 7-1/2" 190.5mm 6-1/2" 165.1mm 16" 406mm 72" 1830mm NC46B 4-1/2"REGB 7-7/8" 200mm 6-1/2" 165.1mm 16" 406mm 72" 1830mm NC46B NC46P 7-7/8" 200mm 6-1/2" 165.1mm 16" 406mm 72" 1830mm NC46B 4-1/2"REGB 8" 203.2mm 6-3/4" 171mm 16" 406mm mm NC50B NC50P 8" 203.2mm 6-3/4" 171mm 16" 406mm mm NC50B 4-1/2"REGB 8-1/2" 215mm 6-3/4" 171mm 16" 406mm mm NC50B NC50P 8-1/2" 215mm 6-3/4" 171mm 16" 406mm mm NC50B 4-1/2"REGB 6-3/4" 171mm 16" 406mm 75" 1900mm NC50B NC50P 6-3/4" 171mm 16" 406mm 75" 1900mm NC50B 4-1/2"REGB 12" 304.8mm 8" 203.2mm 18" 457mm 79" 2010mm 6-5/8"REGB 6-5/8"REGP 12" 304.8mm 8" 203.2mm 18" 457mm 79" 2010mm 6-5/8"REGB 6-5/8"REGB 12-1/4" 311mm 8" 203.2mm 18" 457mm 79" 2010mm 6-5/8"REGB 6-5/8"REGP 12-1/4" 311mm 8" 203.2mm 18" 457mm 79" 2010mm 6-5/8"REGB 6-5/8"REGB 14-3/4" 374mm 8" 203.2mm 18" 457mm 84" 2140mm 6-5/8"REGB 6-5/8"REGP 14-3/4" 374mm 8" 203.2mm 18" 457mm 84" 2140mm 6-5/8"REGB 6-5/8"REGB

36 Specification - Straight Integral Blade Stabilizer 15-1/2" 393.7mm 8" 203.2mm 18" 457mm 85" 2160mm 6-5/8"REGB 6-5/8"REGP 15-1/2" 393.7mm 8" 203.2mm 18" 457mm 85" 2160mm 6-5/8"REGB 6-5/8"REGB 16" 406.4mm 85" 2160mm 7-5/8"REGP 16" 406.4mm 85" 2160mm 17" 431.8mm 88" 2240mm 7-5/8"REGP 17" 431.8mm 88" 2240mm 17-1/2" 444mm 88" 2240mm 7-5/8"REGP 17-1/2" 444mm 88" 2240mm 92" 2340mm 7-5/8"REGP 92" 2340mm 22" 558.8mm " 2340mm 7-5/8"REGP 22" 558.8mm " 2340mm

37 6.2 Replaceable Sleeve Stabilizer Replaceable sleeve stabilizer is special tool suitable for directional well drilling, consisting of an integral mandrel and a sleeve. One mandrel series can be equipped with different sizes of sleeve for several hole sizes. The stabilizer sleeve can be changed quickly and easily after sleeve hard banding is worn-out. There re two styles available: 2-piece stabilizer, and 3-piece stabilizer. Main Technical Parameter Sleeve Stabilizer Body Thread Code on Both Ends Bit Dia. DC Dia. Work Upset Fishing Make-up Over length L (mm) Drill String Near Bit Length Upset End I.D. (in) (in) O.D. End Dia. Neck Length Torque Drill (mm) length (mm) (mm) Near Bit Top Down Top Down (mm) (mm) (mm) (KN.m) String 8-1/ / ~ 1,800 ~ 1,800 ~ 4-1/2 4-1/2 4-1/2 4-1/ / ,900 1,900 IF IF IF REG 7-3/ / ~ 6-5/8 6-5/8 6-5/8 6-5/8 11-1/ REG REG REG REG ,800 ~ 1,800 ~ 17-1/ ,000 2, / ~ /8 REG 7-5/8 REG 7-5/8 REG 7-5/8 REG ,000 ~ 2,200 2,000 ~ 2,200

38 6.3 Non-Rotating Stabilizer Non-rotating stabilizer (rubber sleeve stabilizer) is able to avoid blade wear and wall damage during drilling. The non-rotating stabilizer consists of mandrel, copper washer, rubber sleeve, spacer sleeve and self-locking lower sub. During drilling, the non-rotating stabilizer transfers the torque by means of mandrel. The rubber sleeve is sliding and moving relative to the mandrel and it plays a role in stabilizing the well. A locking clutch (self-locking lower sub) will help to avoid sleeve rotation during washover operation. Main Technical Parameter Stabilizer Sleeve Stabilizer Body Hole Size (in) Length (mm) O.D. (mm) Blade Qty ID (mm) Fishing O.D. (mm) Thread Type Overall Length (mm) 13-3/ /2 IF 2, / /2IF 2, / /2IF 2, /2IF 1, / /8REG 2, /8REG 2, /8REG 2, /8REG 2, /8REG 2,210

39 6.4 Float Valve Stabilizer Float valve stabilizer is effective tool in drilling operation. The stabilizer is connected at upper part of drill bit, and the float valve assembly in stabilizer is near the bit thread. Such structure of stabilizer can realize the automatically shutting off inside bore of tool to avoid the accident. Main Technical Parameter Stabilizer Type Stabilizer Body Float Valve Assembly Float Valve Assembly Stabilizer Thread O.D. (mm) O.D. (mm) Length (mm) FV /8 REG FV /8 REG FV /8 REG FV /8 REG FV /2 IF FV /2 REG FV /2 REG

40 6.5 Spherical Stabilizer Spherical stabilizer is new tool for various drilling operation. We provide spherical stabilizer from 6~ 12 1/4 inch. Main Technical Parameters Body O.D. on Thread on Both Stabilizer Ends (in) Working O.D. Stabilizer Length Both Ends I.D. (mm) String Type Near Bit Type (in) (mm) (mm) Top Down Top Down 6~6-1/ /2IF 3-1/2IF 3-1/2IF 3-1/2REG 7~7-7/ /2IF 4-1/2IF 4-1/2IF 4-1/2REG 8~8-1/ /2IF 4-1/2IF 4-1/2IF 4-1/2REG 9~9-1/ /2IF 4-1/2IF 4-1/2IF 4-1/2REG 12~12-1/ /8REG 6-5/8REG 6-5/8REG 6-5/8REG

41 Hard Facing Spiral Stabilizers Stabilizers are connected with drill collar accessories to make up the downhole drill stem. Hard Facing stabilizers have high tensile, high-wearing feature and recoverability features. This particular dressing comprises tungsten carbide inserts set in a power spray deposit, which is ideal for abrasive formations. Area of tungsten carbide inserts coverage on the surface of hardfacing reaches more than 60%. Hardfacing dressing is some special tungsten-carbide powder. It can get more strength and toughness after the welding procedure. It can ensure the hardfacing s abrasion resistance and not easily pull-out to cause damage. We take full account of chemical composition of the material and the need for repeated redressing without damage for our dressing technique. A well-controlled welding temperature can result in a reliable surface alloy welding operation. The composition plane can reach more than 97%. Hard Facing Stabilizers can be cleaned by acetylene burner after abrasion. When the cleaning process is completed, new hard facing can be welded on the surface, proving the better recoverability. Features: Hard Facing Stabilizers are based on the advanced technology from abroad. This type of stabilizers are generally used in abrasive rock formation in the international drilling market. This kind of stabilizer s hardfacing is firstly invented at home. This kind of stabilizer is prior to the traditional insert alloy column type stabilizer. a. Traditional insert alloy column type stabilizer are easily pull-out and will cause damage to the drill bit. b. It has a longer service life than traditional inlaid alloy column type stabilizer. c. This type of stabilizers are easy to repair, to reduce the well drilling costs.

42 We offer a complete range of Hardfacing to suit all drilling conditions. All stabilizers can be banded with the following hardfacing. Crushed tungsten carbide held in a nickel bronze matrix. The 3mm grain size ensures greater concentration of carbide which is ideal for soft formation drilling. Trapezoidal tungsten carbide inserts held in a sintered carbide nickel bronze matrix. This will give a greater depth of carbide coverage - ideal for high deviation drilling in abrasive formations. Tungsten carbide inserts set in a powder spray deposit ideal for abrasive formations. 97% bonding guaranteed, certified by ultrasonic report. Recommended for non-magnetic stabilizers. Tungsten carbide inserts (button type). The inserts have been developed to allow cold insertion and maintain close fit. A greater concentration of inserts on the bottom third of the blade and leading edge will increase surface contact to reduce wear in highly abrasive formations. The oxy-acetylene process applies tough molten carbide particles of varying sizes held in a nickel chrome matrix which provides excellent bonding properties and greater surface wear characteristics are achieved. Surface hardness levels over 40HRC. Ideal for Geo-Thermal applications over 350. This process is a highly automated way of applying hardface and utilizes a combined arc / plasma stream on the work piece surface. This results a low base metal dilution and a dense, uniform coating, the filling medium can be variety of hardfacing consumables.

43 VII. KELLY ( SQUARE AND HEXAGONAL) Kelly is main driver of the whole drill string. It transmits torsional energy from the rotary table through the drill string to the bit at the bottom of the hole. The kelly is a long square or hexagonal, precision machined heavy steel bar that is supported by the swivel through the rotary table and is connected to the first joint of drill pipe in the drill string. The kelly has been approved by NS-1 certification. Straightness of the kelly is very crucial in the manufacturing process, thus straightness inspections are carried out before, during and after each machining operation. The flats are precision-milled to API and NS-1 specifications. All milling processes are performed on specially designed rigid kelly mills to ensure tight tolerance and high quality drive sections. Each kelly is furnished with a pressed steel thread protector. Features and Benefits: Manufactured from AISI 4145H modified, fully heat treated alloy steel with a brinell hardness range of BHN and a minimum average Charpy impact value of 40ft-lbs; Ends and drive sections, IDs and connections machined and inspected to API and NS-1 specifications; Ultrasonic inspection is performed on all sections; Shipped in a protective steel-cased scabbard. Main Technical Parameters Upper Box Connection Lower Pin Driving Section Kelly Length Type(LH) O.D. Connection I.D. Cross For Cross Size (In) Standard Optional O.D. (mm) Flat Square Corner (In) Standard Optional Thread (mm) (mm) (mm) (mm) (mm) for Hex 2/1/ /8REG 4-1/2REG /8REG 4-1/2REG NC /1/ /8REG 4-1/2REG NC NC /1/ /8REG 4-1/2REG NC NC /1/ /8REG 4-1/2REG NC /2FH /8REG NC

44 VIII. HOLE OPENER Main Technical Parameters Type Hole Min Mandrel Upper Lower Overall Blade Mandrel Dia. Guiding Fishing Neck Threads (Pin Threads Length No. I.D. (in) (in) Hole (in) Dia. (in) Thread) (Box Thread) (in) HO / / /2 6-5/8 REG 6-5/8 REG 60 HO /2 2-1/4 7-5/8 REG 7-5/8 REG 72 HO / /2 2-1/4 7-5/8 REG 7-5/8 REG 72 HO / /8 REG 7-5/8 REG 69 HO /2 7-5/8 REG 7-5/8 REG 104-3/8

45 IX. DRILL STRING ACCESSORIES 9.1 Lifting Subs Drill tool lifting sub is a special tool for lifting the drill tools in petroleum natural gas industry and geologic exploration. Drill tool lifting sub is divided into two types: 18 degree shoulder and 90 degree shoulder. The lifting sub can be selected according to elevator structure. Main Technical Parameters Nominal End of pin Lifting end No. size (mm) I.D.(mm) Connection O.D.(mm) DF/mm Tong Space LPB/mm O.D.(mm) Tong Space LPB/mm NC NC NC NC NC NC NC NC NC /8 REG NC /8 REG NC NV

46 9.2 Crossover Subs Cross-over sub acts for conversion and connection of drill stem component in petroleum, natural gas and geology drilling work. It is used mainly for connecting of upper drill tools and lower drill tools during drilling operations. These crossovers can be divided into two groups: Straight OD Crossover Sub and Reduced Section Crossover Sub. Straight OD Sub Straight OD sub is used to connect drill stem members that have a similar outside diameter. The drill bit, downhole tools, heavy weight drill pipe and drill pipe can be crossed over using a straight OD sub. Reduced Section Sub Reduced Section Sub is used to connect drill stem parts that have different diameters. This sub can be used to crossover large OD drilling tools or a tapered drill collar string.

47 Main Technical Parameters Sort Description Upper Connection Part Lower Connection Part Type 1 Kelly cross-over sub Kelly Drill pipe A or B 2 Drill pipe cross-over sub Drill pipe Drill pipe A or B 3 Interim cross-over sub Drill pipe Drill collar A or B 4 Drill collar cross-over sub Drill collar Drill collar A or B 5 Drill bit cross-over sub Drill collar Drill bit A or B 6 Swivel cross-over sub Swivel lower sub Kelly C 7 Fishing cross-over sub Kelly Drill pipe C Drill pipe Fishing tools C 9.3 Lifting Plug & Cap Lifting cap is a special tool for lifting of drilling tools in petroleum, natural gas, drilling engineering and geographical exploration. Main Technical Parameters Connection O.D. (mm) Length (mm) Connection O.D. (mm) Length (mm) 7 5/8 REG Pin /8 REG Box /8 REG Pin /8 REG Box NC50 Pin NC50 Box NC46 Pin NC46 Box NC38 Pin NC38 Box NC31 Pin NC31 Box /8 REG Pin /8 REG Box NC26 Pin NC26 Box /2 REG Pin /2 REG Box /2 REG Pin /2 REG Box /8 EUE Pin /8 EUE Box

48 9.4 Kelly / Top Drive Saver Subs When rods is added to increase the depth of drilling, the loosening of the threads are now performed at the bottom end of the saver sub as opposed to the bottom of the Kelly or Top Drive which is the most valuable part of the drill string. This means that the connection between the top end of the saver sub and kelly/ Top Drive is seldom used, and suffers minimal wear and tear, whereas the lower connection is used in almost all cases displacing the most wear and tear from the rotary head connection to the much cheaper Saver Sub which is expendable and reduce costs. 9.5 Oriented Bent Sub The oriented bent sub is a major power deflection tool, having a fixed angle deviated from the low end thread of the bent sub to the axial line of drill stem. Under the application of oriented bent sub, the power drill tool give the bit a constant lateral force to ensure that the bit can cut on the well wall laterally and further drill into a curved well trace. OD. Mm (in) Connection Bent Angle ID, Oriented Box Pin (Deg.) Sleeve (mm) 89 (3-1/2) NC26 NC (4-1/8) NC31 NC (5) NC38 NC (6-1/4) NC46 NC (6-1/2) NC50 NC (7) 5-1/2FH 5-1/2FH (8) 6-5/8REG 6-5/8REG 2 50

49 9.6 Drill Bit Sub 9.7 Wear Sub During Drilling operation, major wear and tear wear often take place between drill pipes and casings. Wear Sub is used to avoid such wear between drill pipes and casings. With features, such as compact structure adn easy operation, wear sub can prolong the service life of drill pipe and casing and reduce the vibration and trembling of drilling tools. It can also limit the contact friction between metals. The wear sub consists of a highly wear rubber sleeve, a metal stiffening liner and a sub body. The rubber sleeve is installed in the middle of sub body and some clearance is given to allow sleeve to rotate freely. The rubber sleeves are made of rubber mixtures with good wear resistance. During drilling operation, the rubber sleeve and sub body can make a relative rotation. The rubber sleeve OD is larger than drill pipe tool joint OD, therefore the tool joint and drill pipes cannot come in contact with casing. The rubber sleeve on wear sub will first contact casing. When friction between rubber sleeve and casing takes place, wearing can be reduced due to the rubber sleeve wear resistance and softness. Usage of tool joints of drill pipes and drill string tools will also be reduced. Spec Body OD mm Sub OD mm ID mm Connection 7" Casing /2IF 9-5/8" Casing /2IF /2IF 10-3/4" Casing /2IF 5-1/2IF 13-3/8" Casing /2IF

50 9.8 Float Valve Sub Float valve sub is an important tool in petroleum exploration and drilling engineering. The float valve sub is connected at upper part of drill bit. The float valve sub is near the bit connecting thread. The float valve sub can also be used at different necessary position of drill string when required. The main application is, when connected with single piece pipe, it prevents mud from coming in and up blocking the hole. When blowout takes place, blowout in drill string will be avoided because nozzle is closed automatically by valve cap of the float valve assembly. Sub OD mm Joint Connection Valve OD mm ID mm /8 REG BXB 121 (5F6R) /8 REG BXB 121 (5F6R) /8 REG BXB 121 (5F6R) /8 REG BXB 121 (5F6R) /2 REG B X NC50 B 88 (4R) /2 REG B X NC50 B 88 (4R) /2 REG B X NC46 B 88 (4R) /2 REG B X NC38 B 61 (2F3R) /8 REG B X NC31 B 48 (1F2R) 38.1

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