Drill Collar y Drill Pipe

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  • Steel Drill Collars

    SB Darron Drill Collars are manufactured from Chromium, Molybdenum Alloy Steel conforming to AISI 4145 H Modified. Fully heat treated and supplied in accordance with A.P.I. Specification 7. An H2S resistant steel is available on request.

    Quality Control and Ultrasonic InspectionState of the art measurement and ultrasonic techniques are used to ensure that the highest control standards within the industry are maintained.

    Every SB Darron Drill Collar is subject to full length, full section ultrasonic examination. Thread connections machined and gauged in accordance with A.P.I. Specification 7 and RP7G are individually examined within our own inspection department as an integral part of final inspection procedures.

    Individual characteristics of each thread such as stand off, taper, pitch, etc., are fully documented on in-house documentation.

    Thread Connections All connections are machined to the highest possible accuracy and conform to the requirements of A.P.I. Specification 7.

    To improve fatigue resistance all connections are cold rolled and to prevent galling during make up all connections are phosphated. Connections are coated with a thread compound conforming to the requirements of A.P.I. and for protection against mechanical damage thread protectors are fitted.

    Precision BoringDrill Collars are deep precision bored to ensure tight tolerances that eliminate wall thickness variation along the bar length and drifted to A.P.I. Specifications. In addition to the standard ranges shown on Sheet 1a special sizes, bores, connections and lengths can be made to meet customers specific requirements.

    Surface Finish The surface finish, linear straightness, roundness and O.D. tolerances conform to A.P.I. Specification.

    Identity Markings Licensed to apply the A.P.I. monogram SB Darron also mark the Drill Collars unique identification serial number, O.D., I.D., size and style of connections.

    Customers own identity markings and additional identity slots can be machined on request.

    Standard ranges and sizes of Drill Collars are shown on Sheet 1a.

    Details of Spiral Drill Collars, Hardbanding and Stress Relief can be found on Sheets 2 and 2a.

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  • Steel Drill Collars

    13

    DRILL COLLAR SPECIFICATIONS

    BORE CONNECTION STYLE AND SIZE

    Standard Bore Optional Bore SIZE O.D INS.

    Standard Ins.

    Optional Ins. A.P.I. No. Other A.P.I. No. Other

    APPROX WEIGHT

    (30FT LONG) LB.

    APPROX WEIGHT

    (3FT LONG) LB.

    3 1 NC26 2 IF NC26 2 IF 1012 1045

    4 2 1 NC31 2 IF NC31 2 IF 1045 1078

    4 2 1 NC31 2 IF NC31 2 IF 1122 1155

    4 2 1 NC31 2 IF NC31 2 IF 1298 1342

    4 2 2 NC35 NC38 3 IF 1412 1463

    5 2 2 NC38 3 IF NC38 3 IF 1606 1659

    5 2 2 NC38 3 IF NC38 3 IF 1793 1848

    5 2 2 NC38 3 IF NC38 3 IF 2046 2112

    5 2 213/16 NC40 4 FH 4 FH 2253 2328

    6 2 213/16 NC44 NC40 4 FH 2486 2570

    6 2 213/16 NC46 4 IF NC46 4 IF 2728 2816

    6 2 213/16 NC46 4 IF NC50 4 IF 2761 2851

    6 2 213/16 NC46 4 IF NC50 4 IF 3025 3124

    7 213/16 2 NC50 4 IF NC50 4 IF 3304 3412

    7 213/16 3 NC50 4 IF 5 FH 3586 3705

    7 213/16 2 NC50 4 IF 5 REG 3885 4013

    7 213/16 3 NC56 6 REG NC56 6 REG 4191 4327

    8 213/16 3 NC56 6 REG NC56 6 REG 4514 4653

    8 213/16 3 6 REG 6 REG 4840 4990

    8 213/16 3 6 REG 6 REG 5181 5337

    8 213/16 3 6 REG 6 REG 5416 5577

    9 3 213/16 NC61 7 REG NC61 7 REG 5786 5973

    9 3 213/16 NC61 7 REG NC61 7 REG 6182 6369

    9 3 213/16 7 REG 7 REG 6538 6750

    9 3 213/16 NC70 7 REG NC70 7 REG 6930 7154

    10 3 213/16 NC70 8 REG NC70 8 REG 7260 7480

    11 3 213/16 NC77 8 REG NC77 8 REG 9020 9295

    11 3 213/16 NC77 8 REG NC77 8 REG 9460 9768

    12 3 213/16 NC77 8 REG NC77 8 REG 10868 11187

    14 3 213/16 NC77 8 REG NC77 8 REG 14949 15400

    SB Darron Drill Collars are available in lengths of 5, 10, 15, 20, 30, 31 and 32 feet and in nominal sizes ranging from 3 to 14. Common sizes are listed here. Other sizes are available upon request. Connections comparison chart.

    NUMBERED CONNECTIONS STYLE OTHER

    NC 26 NC 31 NC 38 NC 40 NC 46 NC 50

    2 IF 2 IF 3 IF 4 FH 4 IF

    4 IF

    - - - -

    4 XH 5 XH

    On enquiring, customers should specify : 1. Type (slick or spiral grooved) 2. Outside and inside diameters

    (O.D., I.D.) 3. Length 4. Connection size and type 5. Stress Relief Groove on pin

    and box ends 6. Special features i.e.; hard-

    banding (band location and width) slip and/or elevator recesses, fishing neck

    7. Type of thread protector

    With 2 ends 11 O.D. NOTE: H90 and X hole connections are supplied on request.

  • Steel Drill Collars

    Spiral Grooving To avoid differential pressure sticking, the surface of the Drill Collar can be spiral grooved, typically with three right hand spirals.

    Drill Collar cross sections shown below show the reduced contact area with the wall of the hole.

    SPIRAL GROOVED DRILL COLLAR SPECIFICATIONS Size O.D. Depth of Cut Spirals Direction Pitch Type

    41/2 - 51/8 7/32 1/32 3 R.H. 38 1 A

    57/8 - 63/8 9/32 1/16 3 R.H. 42 1 A

    61/2 - 67/8 5/16 1/16 3 R.H. 46 1 A

    7 5/16 1/16 3 R.H. 64 1 A

    71/8 - 77/8 11/32 1/16 3 R.H. 64 1 B

    8 - 87/8 3/8 1/16 3 R.H. 68 1 B

    9 - 97/8 13/32 3/32 3 R.H. 72 1 B

    10 - 103/8 7/16 3/32 3 R.H. 76 1 B

    11 - 12 15/32 3/32 3 R.H. 80 1 B

    The weight of a Slick Drill Collar will be reduced by approximately 4% if spiral grooved.

    HardbandingApplied by the metal arc gas shielded consumable electrode process, incorporating granular tungsten carbide, fed automatically into the molten weld pool to obtain uniform distribution.

    Precisely controlled pre-heating interpass and post weld heat treatment ensure that only weld overlays of optimum integrity are applied. The deposit is made flush to + 1/32 above the O.D. of the collar.

    Please see Sheet 2a for stress relief information and details of slip and elevator groove specifications.

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  • Steel Drill Collars

    Stress Relief Features Downhole tools subject to bending and subsequently cyclic fatigue have been shown to have their connections mechanical characteristics improved by the application of A.P.I. Stress Relief Grooves and Bore Backs. As shown in the illustration below Bore Backs and Stress Relief Grooves are machined in accordance with A.P.I. Specification (Latest Edition).

    STRESS RELIEF GROOVE FOR CONNECTIONS

    Number or Size and Style of Connection

    Length, Shoulder Face to Groove of Box Member, Tol. +0, -1/8

    LX

    Diameter of Pin Member

    at Groove, Tol. +0, -1/32

    DRG

    NC44 41/8 43/16 NC46 (4 IF) 41/8 421/64

    NC50 (41/2 IF) 41/8 43/4 NC56 45/8 519/64 NC61 51/8 555/64 NC70 55/8 647/64 NC77 61/8 727/64

    41/2 FH 35/8 415/64 51/2 REG 43/8 455/64 65/8 REG 45/8 527/64 75/8 REG 47/8 613/32

    SLIP AND ELEVATOR GROOVE SPECIFICATIONS Groove Dimensions

    Based on Drill Collar O.D. Drill Collar

    O.D. Ranges Elev. Groove

    Depth A* R C** Slip Groove

    Depth B* D**

    4 - 45/8 7/32 1/8 4 3/16 31/2 43/4 - 55/8 1/4 1/8 5 3/16 31/2 53/4 - 65/8 5/16 1/8 6 1/4 5 63/4 - 85/8 3/8 3/16 71/2 1/4 5

    83/4 & larger 7/16 1/4 9 1/4 5

    * A and B dimensions are from nominal O.D. of a new drill collar

    ** Angle C and D dimensions are reference and approximate

    NOTE: These dimensions are not to be construed as A.P.I. Standard.

    15

  • Drill Pipe

    SB Darrons supplier in India offers a complete range of Drill Pipe with Tool Joints attached from 2.3/8 OD to 5.1/2 OD according to API Specification 7 and guidelines presented in API RP7G and Premium Specifications.

    Drill Pipes with 95% Remaining Body Wall and Extra Long Tool Joints and Extra Long Internal Taper and Special Grades are also offered upon customers request. Holiday Free Internal Plastic Coating is also offered upon customers request.

    Drill Pipe and Tools Joints are manufactured from the finest quality steel available. Each step of the manufacturing process is performed with the highest degree of accuracy to meet or exceed API Specifications as well as the Industry Standards.

    Plain End Pipes and Tool Joint Forgings are procured to specific metallurgical chemistries and are matched for physical properties, welding compatibility, weld strength and product integrity.

    Plain End Pipe is upsetted and heat-treated full length by the Quench and Temper process to achieve uniform mechanical properties. The upset profile is designed to blend with the inside diameter of the pipe body with a generous radius giving a smooth transition from the thicker cross section of the upset to the pipe body. The smooth transition minimizes the stress concentrations.

    The heat-treated pipe is tested for tensile and impact properties and are 100% non-destructively inspected for possible longitudinal and transverse defects, wall thickness and grade verification. Dry magnetic particle inspection of the upset ends is done to ensure that the upsets are free from defects. The OD & ID and face of the upsets are CNC machined for a clean surface as part of pipe preparation prior to welding.

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  • Drill Pipe

    Tool Joint Forgings are turned, bored and faced prior to heat treatment by the Quench and Temper process to produce a uniform microstructure, high ductility, and other mechanical properties in accordance with API Specifications. The heat treatment is done under controlled atmosphere for consistent quality. The hardness of every tool joint is checked by Brinell Hardness Tester and recorded. The tensile and impact properties are verified by destructive testing of a tool joint representing each process batch. Every tool joint is subjected to wet magnetic particle inspection, both transverse and longitudinal, to insure the absence of defects.

    Threads are precision machined on CNC lathes. All connections are 100% inspected for thread parameters and phosphatized either with Zinc or Manganese for antigalling treatment.

    Tools Joints are attached to the drill pipe tube by friction welding to produce a high integrity solid state weld connection between the tool joint and the upset drill pipe tube. The process involves the rotation of one surface against a second surface at a relatively high speed and under heavy pressure. The friction between the tool joint surface and the pipe surface generates heat, causing the contact surfaces to reach a high temperature, below the melting temperature, at which they are forged together, producing the weld. Every weld is monitored and recorded in a strip chart.

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  • Drill Pipe

    The OD and ID weld rams are removed by shearing and machining. Post weld heat treatment of the heat-affected zone between the drill pipe upset and the tool joint is carried out to restore the properties of the weld zone. The post weld heat treatment is a Quench and Temper process by which the weld zone is first brought to its austenitizing temperature, and then polymer quenched. An area wider than the weld zone is then re-heated by induction to tempering temperature. Every post weld heat treatment is monitored and recorded in a strip chart.

    Each weld is 100% inspected for hardness to confirm that they are adequately tempered. The post weld heat treatment process consistently produces stronger, tougher, and more uniform weld properties and a desirable microstructure, which maximizes the resistance to stress and fatigue.

    Surfaces adjacent to the weld line are smooth finished on both the OD and ID. Precision machining and grinding provides a surface finish that is free of stress risers. Each weld area is 100% inspected using wet magnetic particle and ultrasonic inspection techniques. Destructive testing of the weld covering tensile, yield, impact and bend tests are carried out for every defined lot and are documented.

    The Quality Control involves sampling at defined and random intervals for process control.

    All the tests and inspection results and product traceability data are fully documented and maintained in a computerized data base. At any time, the Customer can be provided with a comprehensive account of his product.

    TraceabilityFor each drill pipe component, complete product and process traceability is maintained from the raw material to the completion of all the manufacturing. For the pin and box tool joints, the mill test certificates are confirmed by incoming testing and each tool joint is provided with a unique product number and this product number gives the traceability through out the manufacturing process. The same procedure is applied to the pipe for its traceability.

    Complete documentation is provided with each shipment detailing the full Quality Control records like :

    Quality Clearance Certificate Length Tally Sheet Drill String Assembly Data, which includes the product number of each component (Pin and Box and Pipe),

    heat numbers of each component, finished length, upset to upset length & weight of each pipe. Mill Test & Inspection Certificate that includes chemical analysis for all pipe and tool joints, mechanical

    results of pipe and upset and tool joints, and mechanical results of test welds. Non Destructive Test Certificate Any other documentation per Customers request can also be provided. Options available on customers request :

    Extra Long Tool Joints : to provide increased space for connection rework and for tong handling

    Make and Break of Tool Joints : break the joints in by making up three times to their recommended make-up torque. This option ensures proper initial make-up of tools joints, which affects the life of the tool joint connections. Saves rig time.

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  • Drill Pipe

    Cold Rolling : of thread roots to create a pre-stress compression loading condition which increases fatigue life by increasing resistance to crack initiation.

    Hardfacing of Tool Joints : ARNCO 200XT : Provides low coefficient of friction to reduce casing wear, as well as provide

    a high resistance to rapid abrasive wear on the tool joint.

    ARMACOR M : Provides a low coefficient of friction and high wear resistance to prevent casing wear as well as abrasive wear on the tool joint.

    Internal Plastic CoatingInternal Plastic Coating of Drill Pipe improves the performance and life of the drill pipe.

    The Drill Pipe is thermal cleaned and the internal surface is blasted with grit for a good anchor pattern preparatory to Coating. A two stage application of phenolic / epoxy liquid coatings is sprayed on to the internal surface of the drill pipe in a controlled manner and thermal cured at each stage. This ensures uniform coating thickness and Quality throughout the length of the Drill Pipe.

    The finished Drill Pipe is externally coated with rust preventive varnish, attached with Thread Protectors and Skid Bundled with utmost care.

    Our supplier integrated facility in India gives us the Competitive Edge to manufacture and supply Drill Pipe to your complete satisfaction.

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  • Drill Pipe

    TOOL JOINT (forgings)

    GREEN PIPE TT

    INSPECTION

    NDT INSPECTION

    THREADING

    PIPE PREPARATION

    HARD FACING*

    STRAIGHTENING

    INSPECTION

    HEAT TREATMENT

    HEAT TREATMENT

    UPSETTING

    MACHINING

    TT

    TT

    TT

    TT

    TT

    T

    TPHOSPHATING

    T

    *Optional : Hardfacing, Internal Plastic Coating

    XT

    T

    T

    T

    T

    T

    T

    T

    T

    FRICTION WELD

    FLASH REMOVAL

    POST WELD HEAT TREATMENT

    OD&ID GRINDING

    TIR, HARDNESS, UT, & MPI

    INTERNAL PLASTIC COATING*

    FINAL INSPECTION

    DOPE/THREAD PROTECTOR INSTALLATION

    OD RUST PREVENTIVE COATING

    SKID BUNDLING

    TSHIPMENT

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  • Drill Pipe

    Mechanical Properties of API Drill Pipe Grades

    Group Grade

    Yield Strength Tensile Strength

    Minimum Elongation % Minimum

    API Specification

    Minimum Maximum

    PSI MPa PSI MPa PSI MPa

    1 E-75 75,000 517 105,000 724 100,000 689 * 5D

    3 X-95 95,000 655 125,000 862 105,000 724 * 5D

    G-105 105,000 724 135,000 931 115,000 793 * 5D

    S-135 135,000 931 165,000 1138 145,000 1000 * 5D

    U0.9 * API formula e = 625,000 A0.2 /

    Where :

    e minimum elongation in 2 inches in percent rounded to nearest percent.

    A cross sectional area of the tensile test specimen in square inches, based on specified outside diameter, or nominal specimen width, and specified wall thickness, rounded to the nearest 0.01 sq. in., or 0.75 sq. in. whichever is smaller.

    U specified tensile strength, psi.

    Mechanical Properties of Tool Joint

    Minimum Yield Strength

    Minimum Tensile Strength Elongation %

    Hardness Brinell

    PSI MPa PSI MPa Minimum Range

    120,000 827 140,000 965 13 285-341

    23

  • Drill Pipe

    Charpy V-Notch Impact requirements as per American Petroleum Institute (API) and Manufacturer Specification

    Impact Values for Tool Joints

    Manufacturer Specification Specimen

    Size (mm x mm)

    API

    Specification Minimum Average Charpy V-Notch Impact Energy of each set of three

    Specimens Ft/Lb (J)

    Minimum Charpy V-Notch Impact Energy of any

    Specimen of a Set Ft/Lb (J) 10 x 10 NA 40 (54) 35 (47) 10 x 7.5 NA 32 (43) 28 (38) 10 x 5.0 NA 22 (30) 19 (26)

    Test Temperature : 70F5F (212.8C) NA : Not Applicable

    Impact Values for Test Welds API Specification Manufacturer Specification

    Specimen Size

    (mm x mm)

    Minimum Average Charpy V-Notch Impact Energy of each set of three

    Specimens

    Minimum Charpy V-Notch Impact Energy of any

    Specimen of a Set

    Minimum Average Charpy V-Notch Impact Energy of each set of three

    Specimens

    Minimum Charpy V-Notch Impact Energy of any

    Specimen of a Set

    Ft/Lb (J) Ft/Lb (J) Ft/Lb (J) Ft/Lb (J) 10 x 10 12 (16) 10 (14) 32 (43) 27 (37) 10 x 7.5 -- -- 26 (35) 22 (30)

    Test Temperature : 70F5F (212.8C)

    Impact Values for Drill Pipes

    (for Group 1 & 3) API Specification

    Specimen Size

    (mm x mm)

    Minimum Average Charpy V-Notch Impact Energy of

    each set of three Specimens Ft/Lb (J)

    Minimum Charpy V-Notch Impact Energy of any

    Specimen of a Set Ft/Lb (J)

    Manufacturer Specification

    10 x 10 40 (54) 35 (47) Same as API 10 x 7.5 32 (43) 28 (38) - do - 10 x 5.0 22 (30) 19 (26) - do -

    Test Temperature : 70F5F (212.8C)

    Alternate Low Temperature Charpy V-Notch Impact Toughness Testing of

    Group 1 (Grade E-75) & Group 3 (Grade X-95, G-105 & S-135) API Specification

    Specimen Size

    (mm x mm)

    Minimum Average Charpy V-Notch Impact Energy of

    each set of three Specimens Ft/Lb (J)

    Minimum Charpy V-Notch Impact Energy of any

    Specimen of a Set Ft/Lb (J)

    Manufacturer Specification

    10 x 10 30 (41) 22 (30) Same as API 10 x 7.5 24 (33) 18 (24) - do - 10 x 5.0 20 (27) 15 (20) - do -

    Test Temperature : 14F5F (-10C 2.8C)

    24

  • Drill Pipe Pup Joints

    SB Darron fully integral Drill Pipe Pup Joints are manufactured from full length barstock in material specification AISI 4145 H Modified, fully heat treated in accordance with A.P.I. Specification 7.

    DIMENSIONAL DATA DRILL TOOL ELEVATOR TONG SPACE AVAILABLE PIPE

    NOMINAL SIZE (A)

    INSIDE DIAMETER

    (B)

    JOINT OUTSIDE

    DIAMETER (C)

    CONNECTION TYPE

    AND SIZE

    UPSET DIAMETER

    (D)

    LENGTHS LENGTHS (FT)

    (G)

    APPROX WEIGHT

    (LBS) BOX (E)

    PIN (F)

    31/2 23/8 43/4 NC38

    (31/2 IF) 37/8 101/2 8

    5 10 15 20

    143 224 310 3945

    31/2 211/16 43/4 NC38

    (31/2 IF) 37/8 10 7

    5 10 15 20

    132 198 200 3325

    4 213/16 51/4 NC40

    (4 FH) 43/16 10 7

    5 10 15 20

    178 286 394 50251/2

    4 31/4 53/4 NC46

    (41 IF) 41/2 10 7

    5 10 15 20

    167 242 312 3656

    41/2 31/2 6 NC46

    (41 IF) 411/16 10 7

    5 10 15 20

    220 348 477 60751/4

    41/2 31/2

    61/8 NC50 (41/2 IF)

    5 10 7

    5 10 15 20

    205 310 418 524

    61/4 63/8

    41/2 33/4

    61/8 NC50 (41/2 IF)

    5 10 7

    5 10 15 20

    161 264 345 429

    61/4 63/8

    5 31/2 63/8 NC50

    (41/2 IF) 51/8 10 7

    5 10 15 20

    253 422 594 76361/2

    5 33/4 63/8 NC50

    (41/2 IF) 51/8 10 7

    5 10 15 20

    229 374 519 66461/2

    1. Upon request tool joints can be supplied 2 longer than standard to facilitate additional connection repairs.

    2. Drill Pipe Pup Joints can be manufactured with alternative connections/diameters to those shown above.

    3. All connections are machined and finished in accordance with A.P.I. Specification 7. Thread roots are cold rolled, phosphate coated and fitted with thread protectors.

    4. Drill Pipe Pup Joints can be supplied with either 18 degree tapered or square shoulders.

    When ordering SB Darron Drill Pipe Pup Joints, please specify :

    1. Nominal pipe diameter A 2. Bore diameter B 3. Tool joint diameter C 4. Size and type of connections 5. Overall length/shoulder to shoulder G 6. 18 degree or square elevator shoulder

    25

  • Heavy Weight Drill Pipe (Integral)

    SB Darrons supplier in India offers a complete range of heavyweight drill pipe is integral and manufactured from AISI 4145H fully heat-treated steel that conforms to all API Spec. 7 standards.

    HardbandingTo optimize wear resistance, hardbanding is standard on tool joint connections and central upset. This heavy-duty hard metal application is a closely controlled welding process applied with an automatic hardbanding machine. Flush hardbanding is applied 4 inches on the box end and 5 inches on the pin end. OD hardbanding of two 3-inch-long bands is applied to the central upset. Arnco 200XT is optional.

    Material (4145) Mechanical Properties Precision machined from one integral piece of AISI 4145H Q&T bar stock.

    Hardness BHN 1 below Surface 290-341 Tensile Strength PSI 140,000 min. Yield Strength PSI 110,000 min. Elongation in 2 gage length 13% min. Reduction of Area 40% min. Impact Strength Type x IZ0D 40 ft.lb.min.

    Quality Control Each piece of Integral Heavyweight Drill Pipe is 100% dimensionally inspected and the material is full length ultrasonically inspected. All connections are 100% inspected to conform to latest API standards. Full material certifications are provided with each piece of Integral Heavyweight Drill Pipe.

    HardbandingTo optimize wear resistance, hardbanding is standard on tool joint connections and central upset. This heavy-duty hardmetal application is a closely controlled welding process applied with an automatic hardbanding machine. Flush hardbanding is applied 4 inches on the box end and 5 inches on the pin end. OD hardbanding of two 3 inch-long bands is applied to the central upset. (Arnco 200XT optional).

    Connection Features API stress relief groove on pins and bore back relief feature on boxes are standard on the 4 and 5 heavyweight. All connections are kemplated, coated with lubricant and provided with thread protectors. Threat roots are cold rolled on all sizes.

    Dimensional Data-Range II Tool Centre Elevator Connection Approx. Weight

    Nom. Joint Nom. Wall Upset Upset Size LBS Make Up TorqueSize OD ID Thickness OD OD and Per Per Joint

    (A) (E) (B) (C) (D) Type Foot 30 ft. Ft.-Lbs. 3 4 2 .718 4 3 NC 38 (3 IF) 25.3 760 9,900 4 6 213/16 .844 5 4 NC 46 (4 IF) 41.0 1,230 21,800 5 6 3 1.000 5 5 NC 50 (4 IF) 49.3 1,480 29,400

    5 7 3 1.125 6 511/16 5 FH 57.0 1,710 33,200 6 8 4 1.312 7 6 6 FH 71.5 2,145 46,900

    When ordering, please specify :

    1. Nominal Size (A) 2. Hardbanding Type : Standard 14/24 mesh, ARNCO 100XT or ARNCO 200XT 3. API Relief groove pin and bore back box, if required

    26

  • Rotary Crossover Subs

    SB Darron Drill Stem Substitutes are manufactured from Alloy Steel AISI 4145 H Modified conforming to the requirements of A.P.I. Specification 7.

    All connections are machined to A.P.I. Specification.Thread roots are cold rolled and kemplate coated to minimize galling on request. Substitutes are manufactured with straight or reduced section as shown below.

    Reduced Section Subs Straight OD Subs

    On enquiring and when ordering, please specify : For reduced Section Substitutes include :

    1. Identify use (e.g. DC/DC DC/DP Bit Sub etc. 1. Outside diameter of reduced section 2. Outside diameter(s) 2. Length of reduced section 3. Inside diameter(s) 4. Overall length 5. Size and style of connection For Bit Substitutes include : 6. Whether stress relief groove and/or bore back are to

    be incorporated 1. Float bore and style

    Kelly Saver Subs

    Kelly Saver Substitutes are available in 36, 18 or 12 lengths for throw away type.

    Substitutes 36 long can be fitted with rubber body protectors on request.

    27

  • Lift Subs & Lift Plugs

    The SB Darron Lift Subs are manufactured from AISI 4145 H Modified Steel, fully heat treated and supplied in accordance with A.P.I. Specification 7.

    Lift Subs can be supplied with an 18 degree tapered shoulder as shown, or alternatively with a square shoulder (Dial Head).

    When ordering or requesting quotations on Lift Subs, please specify :

    A. Drill collar O.D. B. Tool joint O.D. C. Drill pipe O.D. D. Drill collar connection size and type E. Bore F. Tapered or square shoulder

    LIFT SUB DIMENSIONS DRILL COLLAR

    SIZE (A) APPROX

    WEIGHT (LB)

    3 1/2 40

    4 1/8 50

    4 3/4 84

    5 88

    6 150

    6 1/4 168

    6 1/2 168

    6 3/4 168

    7 169

    7 1/4 169

    8 257

    8 1/4 257

    9 1/2 320

    9 3/4 320

    11 368

    SB Darron Lift Plugs are manufactured from AISI 4145 H Modified Steel, fully heat treated and supplied in accordance with API Specification 7.

    In addition to the standard Lift Plug shown, Lift Plugs can be manufactured Pin to Box or Bail type.

    When ordering or requesting quotations on Lift Plugs, please specify :

    A. Drill collar O.D. B. Lift plate O.D. C. Drill collar connection size and type D. Tong space length (8 standard) E. Standard or Bail type F. Pin and box connections

    LIFT PLUG DIMENSIONS DRILL

    COLLAR SIZE (A)

    LIFTING PLATE DIA. (B)

    APPROX WEIGHT

    (LB)

    3 1/2 5 1/2 35

    4 1/8 6 40

    4 3/4 6 1/2 50

    5 7 58

    6 8 82

    6 1/4 8 82

    6 1/2 8 1/2 90

    6 3/4 8 1/2 90

    7 9 100

    7 1/4 9 100

    8 10 128

    8 1/4 10 128

    9 1/2 11 1/2 165

    9 3/4 11 1/2 165

    11 13 245

    28

  • Circulating Subs

    The SB Darron Circulating Subs have been designed to achieve increased mud circulation by placement in the B.H.A., either above the bit or down hole motor to pump materials in case of lost circulation.

    Activation is accomplished by dropping a chrome steel ball down the drill string and then engaging the mud pumps. On application of 3000 psi fluid pressure, the ball shears the pin holding the sleeve in its primary position. The sleeve and pin drop into the secondary position opening the three sub ports and diverting the downhole flow.

    SB Darron Circulating Subs are manufactured from AISI 4145 H material fully heat treated to give 285-341 BHN and are available in the same nominal diameters as standard drill collars or to customers own specifications.

    See separate sheet for Re-dress procedure.

    F i g 1 Drilling fluid F i g 2 Drilling fluid flow after pin flow after pin is sheared is sheared

    29

  • Circulating Subs

    A Assembly Part Nos

    i Re-Dress Kit contains : 1 Sleeve, 1 Ball, 1 Shear Pin, 1 Pressure Plug, 4 O Rings

    ITEM NO. DESCRIPTION 4 6 6 8 8 9

    1 SUB BODY CS 475 CS 625 CS 650 CS 800 CS 825 CS 950

    2 SLEEVE CS 41 CS 42 CS 42 CS 42 CS 42 CS 43

    3 BALL CS 51 CS 52 CS 52 CS 52 CS 52 CS 52

    BALL DIA 2 2 2 2 2 2

    4 SHEAR PIN CS 61 CS 62 CS 63 CS 64 CS 65 CS 66

    5 PRESSURE PLUG CS 91 CS 92 CS 92 CS 92 CS 92 CS 92

    6 O RING SEAL CS 81 CS 82 CS 82 CS 82 CS 82 CS 83

    7 RE-DRESS KIT CS 21 CS 22 CS 23 CS 24 CS 25 CS 26

    COMPLETE ASSEMBLY CS 01 CS 02 CS 03 CS 04 CS 05 CS 06

    ASSEMBLED WEIGHT (KG) 52 95 105 170 185 235

    B Re-Dress Procedures

    1. Isolate circulating sub 2. Remove ball (if still housed in sub) 3. Select Allen Key and remove pressure plug 4. Remove top half of shear pin and discard 5. Retract sleeve until remaining half of shear pin in sleeve is visible. Remove and discard 6. Slide sleeve out of sub bore 7. Remove the 4 O rings and discard 8. Check condition of sleeve and ball for raised edges and physical damage 9. If ball and / or sleeve is damaged replace with new ones 10. Check conditions of sub bore and drilled tapped hole remove burrs if required 11. Fit 4 new O rings onto checked or renewed sleeve grease O.D. 12. Grease sub I.D. thoroughly 13. Slide sleeve into sub, ensure correct insertion (i.e. counter bored end of sleeve first) until the widest groove is

    visible through the drilled and tapped hole 14. Select new shear pin check for sharp edges, de-burr if necessary and position in sub body 15. Select Allen Key and pressure plug (use existing plug if undamaged) and screw into body

    30

    SB DARRON Catalogue 12SB DARRON Catalogue 13SB DARRON Catalogue 14SB DARRON Catalogue 15SB DARRON Catalogue 16SB DARRON Catalogue 17SB DARRON Catalogue 18SB DARRON Catalogue 19SB DARRON Catalogue 20SB DARRON Catalogue 21SB DARRON Catalogue 22SB DARRON Catalogue 23SB DARRON Catalogue 24SB DARRON Catalogue 25SB DARRON Catalogue 26SB DARRON Catalogue 27SB DARRON Catalogue 28SB DARRON Catalogue 29SB DARRON Catalogue 30