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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 Inspection

State 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.

Precision Boring

Drill 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

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.

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.

12

Steel Drill Collars

SB Darron Drill Collars are available in lengths of 5, 10, 15, 20, 30, 31 and 32 feet and in nominal sizes ranging from 3½” to 14”. Common sizes are listed here. Other sizes are available upon request. Connections comparison chart.
NUMBERED CONNECTIONS STYLE OTHER

DRILL COLLAR SPECIFICATIONS
SIZE O.D INS.

BORE
Standard Ins. Optional Ins.

CONNECTION STYLE AND SIZE
Standard Bore
A.P.I. No. Other

Optional Bore
A.P.I. No. Other

APPROX WEIGHT (30FT LONG) LB.

APPROX WEIGHT (3FT LONG) LB.


4⅛



5



6



7



8



9



10
11
11¼
12
14


2
2
2









2 /16
2 /16
2 /16
2 /16
2 /16
2 /16
2 /16
2 /16
3
3
3
3
3
3
3
3
3
13

NC26 2⅜ IF




2
2
2
2 /16
2 /16
2 /16
2 /16
2 /16

3

3
3
3
3
3
2 /16
2 /16
2 /16
2 /16
2 /16
2 /16
2 /16
2 /16
2 /16
13

NC26 2⅜ IF
NC31 2⅞ IF
NC31 2⅞ IF
NC31 2⅞ IF
NC38 3½ IF
NC38 3½ IF
NC38 3½ IF
NC38 3½ IF
4½ FH
NC40 4½ FH
NC46 4 IF
NC50 4½ IF
NC50 4½ IF
NC50 4½ IF
5½ FH
5½ REG
NC56 6⅝ REG
NC56 6⅝ REG
6⅝ REG
6⅝ REG
6⅝ REG
NC61 7⅝ REG
NC61 7⅝ REG
7⅝ REG
NC70 7⅝ REG
NC70 8⅝ REG
NC77 8⅝ REG
NC77 8⅝ REG
NC77 8⅝ REG
NC77 8⅝ REG

1012
1045
1122
1298
1412
1606
1793
2046
2253
2486
2728
2761
3025
3304
3586
3885
4191
4514
4840
5181
5416
5786
6182
6538
6930
7260
9020
9460
10868
14949

1045
1078
1155
1342
1463
1659
1848
2112
2328
2570
2816
2851
3124
3412
3705
4013
4327
4653
4990
5337
5577
5973
6369
6750
7154
7480
9295
9768
11187
15400

NC31 2⅞ IF
NC31 2⅞ IF
NC31 2⅞ IF
NC35
NC38 3½ IF
NC38 3½ IF
NC38 3½ IF
NC40 4 FH
NC44
NC46 4 IF
NC46 4 IF
NC46 4 IF
NC50 4½ IF
NC50 4½ IF
NC50 4½ IF
NC56 6⅝ REG
NC56 6⅝ REG
6⅝ REG
6⅝ REG
6⅝ REG
NC61 7⅝ REG
NC61 7⅝ REG
7⅝ REG
NC70 7⅝ REG
NC70 8⅝ REG
NC77 8⅝ REG
NC77 8⅝ REG
NC77 8⅝ REG
NC77 8⅝ REG

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

2⅜ IF 2⅞ IF 3½ IF 4 FH 4 IF 4½ IF

4½ XH 5 XH

13

13

13

13

13

13

13

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.; hardbanding (band location and width) slip and/or elevator recesses, fishing neck 7. Type of thread protector

13

13

13

13

13

13

13

13

13

13

13

13

13

With 2 ends 11¼ O.D.

NOTE: H90 and X hole connections are supplied on request.

13

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.

Hardbanding

Applied 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 1 made flush to + /32 above the O.D. of the collar.

SPIRAL GROOVED DRILL COLLAR SPECIFICATIONS
Size O.D. Depth of Cut
7 9 5 5 7

Spirals

Direction

Pitch

Type

4 /2 - 5 /8 5 /8 - 6 /8 6 /2 - 6 /8 7 7 /8 - 7 /8 8 - 8 /8 9 - 9 /8 10 - 10 /8 11 - 12
3 7 7 1 1 7 7 3

1

1

/32 ± /32 /32 ± /16 /16 ± /16 /16 ± /16 /32 ± /16 /8 ± /16
3 3 1 1 1 1 1

1

3 3 3 3 3 3 3 3 3

R.H. R.H. R.H. R.H. R.H. R.H. R.H. R.H. R.H.

38 ± 1 42 ± 1 46 ± 1 64 ± 1 64 ± 1 68 ± 1 72 ± 1 76 ± 1 80 ± 1

A A A A B B B B B

11

3 13 7

/32 ± /32 /32 ± /32
3

/16 ± /32

15

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

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

14

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 NC44 NC46 (4 IF) NC50 (4 /2 IF) NC56 NC61 NC70 NC77 4 /2 FH 5 /2 REG 6 /8 REG 7 /8 REG
5 5 1 1 1

Length, Shoulder Face to Groove of Box Member, Tol. +0, -1/8 LX 4 /8 4 /8 4 /8 45/8 5 /8 5 /8 61/8 3 /8 4 /8 4 /8 4 /8
7 5 3 5 5 1 1 1 1

Diameter of Pin Member at Groove, 1 Tol. +0, - /32 DRG 43/16 4 /64 4 /4 519/64 555/64 6 /64 727/64 4 /64 4 /64 5 /64 6 /32
13 27 55 15 47 3 21

SLIP AND ELEVATOR GROOVE SPECIFICATIONS

Groove Dimensions Based on Drill Collar O.D.
R
1 1 1 3

Drill Collar O.D. Ranges 4 - 4 /8 4 /4 - 5 /8 53/4 - 65/8 6 /4 - 8 /8 8 /4 & larger * **
3 3 5 3 5 5

Elev. Groove Depth A*
7

C** 4º 5º 6º 7 /2º 9º
1

Slip Groove Depth B*
3 3

D** 3 /2 º 3 /2 º 5º 5º 5º
1 1

/32 /4 /8 /16 /16

/8 /8 /8 /4

/16 /16 /4 /4 /4

1 5

1 1 1

3 7

/16

1

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 Darron’s 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 customer’s request. “Holiday Free” Internal Plastic Coating is also offered upon customer’s 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.

16

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.

17

Drill Pipe

The OD and ID weld rams are removed by shearing and machining. Post weld heat treatment of the heataffected 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 reheated 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.

Traceability

For 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 it’s 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 Customer’s request can also be provided. Options available on customer’s request : Extra Long Tool Joints : to provide increased space for connection rework and for tong handling 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.

Make and Break of Tool Joints :

18

Drill Pipe

Cold Rolling Hardfacing of Tool Joints : ARNCO 200XT™ ARMACOR M™

:

of thread roots to create a pre-stress compression loading condition which increases fatigue life by increasing resistance to crack initiation. Provides low coefficient of friction to reduce casing wear, as well as provide a high resistance to rapid abrasive wear on the tool joint. 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 Coating

Internal 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.

19

Drill Pipe

X
TOOL JOINT (forgings) GREEN PIPE

FRICTION WELD

T
FLASH REMOVAL

T
MACHINING

T
UPSETTING

T
POST WELD HEAT TREATMENT

T
HEAT TREATMENT

T
HEAT TREATMENT

T
OD&ID GRINDING

T
INSPECTION

T
STRAIGHTENING

T
TIR, HARDNESS, UT, & MPI

T
HARD FACING*

T
PIPE PREPARATION

T
INTERNAL PLASTIC COATING*

T
THREADING

T
NDT INSPECTION

T
FINAL INSPECTION

T
INSPECTION

T

T
PROTECTOR INSTALLATION

T
PHOSPHATING

DOPE/THREAD

T
OD RUST PREVENTIVE COATING

T T

T
SKID BUNDLING

T
SHIPMENT

*Optional : Hardfacing, Internal Plastic Coating

20

Drill Pipe

Mechanical Properties of API Drill Pipe Grades
Yield Strength
Group Grade

Minimum
PSI MPa
517
655 724
931

Maximum
PSI
105,000
125,000 135,000
165,000

Tensile Strength Minimum
PSI
100,000
105,000 115,000
145,000

Elongation % Minimum

API Specification

MPa
724
862 931
1138

MPa
689
724 793
1000

1
3

E-75
X-95 G-105
S-135

75,000
95,000 105,000
135,000

*
* *
*

5D
5D 5D
5D

* API formula e = 625,000 Where : e A U

A0.2 / U0.9

minimum elongation in 2 inches in percent rounded to nearest ½ percent. 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. specified tensile strength, psi.

Mechanical Properties of Tool Joint
Minimum Yield Strength
PSI 120,000 MPa 827

Minimum Tensile Strength
PSI 140,000 MPa 965

Elongation % Minimum 13

Hardness Brinell Range 285-341

23

Drill Pipe

Charpy V-Notch Impact requirements as per American Petroleum Institute (API) and Manufacturer Specification Impact Values for Tool Joints
Specimen Size (mm x mm)
10 x 10
10 x 7.5
10 x 5.0

Manufacturer Specification
API Specification
NA
NA
NA

Minimum Average Charpy V-Notch Impact Energy of each set of three Specimens Ft/Lb (J)
40 (54)
32 (43)
22 (30)

Minimum Charpy V-Notch Impact Energy of any Specimen of a Set Ft/Lb (J)
35 (47)
28 (38)
19 (26)

Test Temperature : 70°F±5°F (21±2.8°C) NA : Not Applicable

Impact Values for Test Welds
Specimen Size (mm x mm)

API Specification Minimum Charpy Minimum Average V-Notch Impact Charpy V-Notch Energy of any Impact Energy of Specimen each set of three of a Set Specimens
Ft/Lb (J)
Ft/Lb (J)
10 (14)
--

Manufacturer Specification Minimum Charpy Minimum Average V-Notch Impact Charpy V-Notch Energy of any Impact Energy of Specimen each set of three of a Set Specimens
Ft/Lb (J)
32 (43)
26 (35)

Ft/Lb (J)
27 (37)
22 (30)

10 x 10
10 x 7.5

12 (16)
--

Test Temperature : 70°F±5°F (21±2.8°C)

Impact Values for Drill Pipes (for Group 1 & 3)
API Specification
Specimen Size (mm x mm)
10 x 10
10 x 7.5
10 x 5.0
Test Temperature : 70°F±5°F (21±2.8°C)

Minimum Average Charpy V-Notch Impact Energy of each set of three Specimens Ft/Lb (J)
40 (54)
32 (43)
22 (30)

Minimum Charpy V-Notch Impact Energy of any Specimen of a Set Ft/Lb (J)
35 (47)
28 (38)
19 (26)

Manufacturer Specification
Same as API
- do - do -

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)
10 x 10
10 x 7.5
10 x 5.0
Test Temperature : 14°F±5°F (-10°C ±2.8°C)

Minimum Average Charpy V-Notch Impact Energy of each set of three Specimens Ft/Lb (J)
30 (41)
24 (33)
20 (27)

Minimum Charpy V-Notch Impact Energy of any Specimen of a Set Ft/Lb (J)
22 (30)
18 (24)
15 (20)

Manufacturer Specification
Same as API
- do - do -

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.
DRILL PIPE NOMINAL SIZE (A) TOOL JOINT OUTSIDE DIAMETER (C)

DIMENSIONAL DATA
CONNECTION TYPE AND SIZE ELEVATOR UPSET DIAMETER (D)

INSIDE DIAMETER (B)

TONG SPACE LENGTHS BOX (E) PIN (F)

AVAILABLE LENGTHS (FT) (G)

APPROX WEIGHT (LBS)

31/2

23/8

4 /4 5

3

NC38 (31/2 IF) NC38 (31/2 IF) NC40 (4 FH) NC46 (41 IF) NC46 (41 IF) NC50 (41/2 IF) NC50 (41/2 IF) NC50 (41/2 IF) NC50 (41/2 IF)

37/8

101/2

8

31/2

211/16

43/4 5

37/8

10

7

4

213/16

51/4 5 /2
1

43/16

10

7

4

31/4

53/4 6

41/2

10

7

41/2

31/2

6 5 /4
1

411/16

10

7

4 /2

1

31/2

61/8 61/4 6 /8
3

5

10

7

41/2

33/4

61/8 61/4 6 /8
3

5

10

7

5

31/2

63/8 6 /2
1

51/8

10

7

5

33/4

63/8 6 /2
1

51/8

10

7

5 10 15 20 5 10 15 20 5 10 15 20 5 10 15 20 5 10 15 20 5 10 15 20 5 10 15 20 5 10 15 20 5 10 15 20

143 224 310 394 132 198 200 332 178 286 394 502 167 242 312 365 220 348 477 607 205 310 418 524 161 264 345 429 253 422 594 763 229 374 519 664

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

25

Heavy Weight Drill Pipe (Integral)

SB Darron’s 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.

Hardbanding

To 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
Hardness BHN 1” below Surface Tensile Strength PSI Yield Strength PSI Elongation in 2” gage length Reduction of Area Impact Strength Type x IZ0D

Precision machined from one integral piece of AISI 4145H Q&T bar stock. 290-341 140,000 min. 110,000 min. 13% min. 40% min. 40 ft.lb.min.

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.

Quality Control

Hardbanding

To 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 4½” 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
Nom. Size (A) 3½ 4½ 5 5½ 6⅝ Tool Joint OD (E) 4¾ 6¼ 6½ 7 8 Nom. ID (B) 2¼ 213/16 3 3½ 4 Wall Thickness .718 .844 1.000 1.125 1.312

Centre Upset OD (C) 4 5 5½ 6 7⅛

Elevator Connection Upset Size OD and (D) Type 3⅝ NC 38 (3½ IF) 4⅝ NC 46 (4 IF) 5⅛ NC 50 (4½ IF) 511/16 5½ FH 6¾ 6¾ FH

Approx. Weight LBS Make Up Per Per Joint Torque Ft.-Lbs. Foot 30 ft. 25.3 760 9,900 41.0 1,230 21,800 49.3 1,480 29,400 57.0 1,710 33,200 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
On enquiring and when ordering, please specify : 1. 2. 3. 4. 5. 6. Identify use (e.g. DC/DC – DC/DP – Bit Sub etc. Outside diameter(s) Inside diameter(s) Overall length Size and style of connection Whether stress relief groove and/or bore back are to be incorporated

Straight OD Subs
For reduced Section Substitutes include : 1. Outside diameter of reduced section 2. Length of reduced section For Bit Substitutes include : 1. Float bore and style

Kelly Saver Subs

Kelly Saver Substitutes are available in 36”, 18” or 12½” 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. B. C. D. E. F. Drill collar O.D. Tool joint O.D. Drill pipe O.D. Drill collar connection size and type Bore Tapered or square shoulder

LIFT SUB DIMENSIONS
DRILL COLLAR SIZE (A) 3 1/2 4 1/8 4 3/4 5 6 6 1/4 6 1/2 6 3/4 7 7 1/4 8 8 1/4 9 1/2 9 3/4 11 APPROX WEIGHT (LB) 40 50 84 88 150 168 168 168 169 169 257 257 320 320 368

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

LIFT PLUG DIMENSIONS DRILL COLLAR SIZE (A) 3 1/2 4 1/8 4 3/4 5 6 6 1/4 6 1/2 6 3/4 7 7 1/4 8 8 1/4 9 1/2 9 3/4 11 LIFTING PLATE DIA. (B) 5 1/2 6 6 1/2 7 8 8 8 1/2 8 1/2 9 9 10 10 11 1/2 11 1/2 13 APPROX WEIGHT (LB) 35 40 50 58 82 82 90 90 100 100 128 128 165 165 245

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 flow after pin is sheared

F i g 2 Drilling fluid flow after pin is sheared

29

Circulating Subs

A

Assembly Part No’s

i Re-Dress Kit contains : 1 Sleeve, 1 Ball, 1 Shear Pin, 1 Pressure Plug, 4 ‘O’ Rings
ITEM NO. 1 2 3 DESCRIPTION SUB BODY SLEEVE BALL BALL DIA 4 5 6 7 SHEAR PIN PRESSURE PLUG ‘O’ RING SEAL RE-DRESS KIT Ø4¾” CS – 475 CS – 41 CS – 51 2” CS – 61 CS – 91 CS – 81 CS – 21 CS – 01 52 Ø6¼” CS – 625 CS – 42 CS – 52 2¼” CS – 62 CS – 92 CS – 82 CS – 22 CS – 02 95 Ø6½” CS – 650 CS – 42 CS – 52 2¼” CS – 63 CS – 92 CS – 82 CS – 23 CS – 03 105 Ø8” CS – 800 CS – 42 CS – 52 2¼” CS – 64 CS – 92 CS – 82 CS – 24 CS – 04 170 Ø8¼” CS – 825 CS – 42 CS – 52 2¼“ CS – 65 CS – 92 CS – 82 CS – 25 CS – 05 185 Ø9½” CS – 950 CS – 43 CS – 52 2¼“ CS – 66 CS – 92 CS – 83 CS – 26 CS – 06 235

COMPLETE ASSEMBLY ASSEMBLED WEIGHT (KG)

B

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

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