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NOV Grant PridecoDrilling Products & ServicesProduct Management Dept.400 North Sam Houston Pkwy, East Suite 900Houston, TX 77060United States of America+1 (281) 878-8000 main+1 (281) 878-5736 faxwww.NOV.comwww.grantprideco.com

NOV Grant Prideco DPS Bulletin

BulletinInformation

Title:Field Inspection Procedure for Used TurboTorque

and TurboTorque-M Connections

Approval

DPS Manager,Marketing &

Product Mgmt:Jim Brock

BulletinType:

PC-Procedural Bulletin

BulletinDesignation:

PC-15.0-2009Apr23-EXT

Rev.Number:

0 App roval Date: April 23, 2009

Rev. Date: April 23, 2009 Distribution: Internal/External

Aut horedBy:

NOV Grant Prideco Distributi on Date: April 23, 2009

Page 1 PC-15.0-2009Apr23-EXT

Field Inspection Procedure for Used TurboTorque and

TurboTorque-M Connections

1. Scope: The following procedure defines the equipment, inspection methods and acceptance

criteria for field inspection and repair of TurboTorque and TurboTorque-M connections. Thisinspection shall encompass both visual and dimensional methods. The field refacing methodaddressed in this procedure does not apply to the TurboTorque-M connection, which requires

machine redressing in a qualified controlled shop environment.

2. Equipment: The items listed below are required to perform field inspections:

2.1.Generic2.1.1. 12 Steel Rule graduated in 1/642.1.2. Outside and Inside Diameter Spring Calipers2.1.3. Long Stroke Depth Micrometer

2.1.4. Setting Standards for Depth Micrometer2.1.5. Lead Gage with appropriate contacts

2.2.Acquired through NOV Grant Prideco2.2.1. Thread Profile Gage2.2.2. Lead Gage Setting Standard2.2.3. TurboTorque or TurboTorque-M Connection Field Inspection Dimension Drawing


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Page 2 of 6

3. Preparainspecti

wheel

4. Visual i4.1.Pri

Ins

surpar.

4.1.

4.1.

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New Pin

.1.2.2.shall

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er (Seal): R

ension dra

free of gall.1.2 (below)

that exceed

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refacing

of 1/32 ofotal materia

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emain on tial is remov

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etch below.

h torque shs of the pin

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1/32 in d

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ethods shal

aterial mal removal o

enchmark:in on the b

e pin refacid. See ske

Max Reface

chmarks:e primary s

present. R

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oulders shaland box co

urboTorqu

inology an

hes, fins, o

pth and cro

r shall be r

only remo

be remove1/16 bef

fter refacix refacing

g benchmach below.

Ne

fter refacioulder. Th

threading i

l be cleanednections m

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d shoulder l

other condi

ses more t

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r23-EXT

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air the da

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Page 3 of 6 PC-15.0-2009Apr23-EXT

New Benchmark Single Reface Max Reface(With visible step)

4.2.Secondary Shoulder (Internal Torque Shoulder): The Secondary Shoulder is not a sealingsurface. Damage to this surface is not critical unless the damage interferes with the make-up,

driftability, or torque capacity of the connection. Dents, scratches, and cuts do not affect this

surface unless these exceed 1 in width and cause the connection to be rejected due toshortening of the shoulder-to-shoulder length. Filing may be used to repair material

protrusions, which extend from the face. Connection length readings shall not be taken in

damaged areas.

4.3.15Seal: TurboTorque-M connection contains a 15metal-to-metal sealing surface near thepin and box secondary shoulders. This is the primary sealing surface for the TurboTorque-M

connection. This surface is allowed to contain round pit type defects in the contact area of the

seal surface up to 1/32 in diameter and not exceeding 1/32 in depth. Multiple pits of thistype are acceptable provided there is at least 1 circumferential separation between them.

Circumferential lines or marks are acceptable in this surface provided they cannot be detected

by rubbing a fingernail across the surface. The following Pin Seal and Box Seal diagrams

show areas of the seal that may contain damage exceeding that previously stated in thisprocedure. The area on the pin seal within 0.060 of the minor pin nose diameter is a non-

contact surface and damage in this are does not affect sealing. The area on the pin seal within

0.060 of the major pin nose diameter may also contain damage or pitting (in addition to thearea on the pin seal within 0.060 of the minor pin nose diameter), provided that the balance of

the seal contact surface is without damage. The area on the box seal within 0.188 of the

major box cylinder contains the non-contact portion of the box seal and that portion of the sealthat corresponds to the first 0.060 of the pin seal. Damage or pitting is permitted in this area

of the box seal provided that the balance of the seal contact surface is without damage.


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Box Seal

0.188

4.4.Threads: The stab flank to crest radius of the starting 4 to 5 threads of the pin and boxconnections round off during break-in and normal operation. This condition is normal and

does not affect the service of the connection. The remaining thread flank surfaces shall be freeof damage that exceeds 1/16 in depth or 1/8 in diameter. Thread roots shall be free of

damage that extends below the radius. Thread crest shall be free of damage that would

interfere with make-up. Material that protrudes beyond the thread profile should be removedusing a round cornered triangle hand file or soft buffing wheel.

4.5.Profile: The thread profile shall be verified along the full length of complete threads in two

locations at least 90apart. The profile gage must mesh evenly in the threads and show

normal contact. If the profile gage does not mesh in the threads, lead measurements shall betaken.

4.6.Coating: Threads and shoulders that are repaired by filing or refacing must be protected byphosphate coating or by using copper sulfate.

5. Dimensional Inspection:

5.1.Lead: If the profile gage indicates that thread stretch has occurred, both thread leads shall beverified individually (in lead) and jointly (between leads). Connections failing the below

inspections in par 5.1.1 or 5.1.2 shall be inspected for cracks and if none are found, re-threaded.

5.1.1. Three Threads per Inch (3 TPI)5.1.1.1. The 1stlead shall be measured over 6 threads (2 interval) and shall not exceed

0.006.

5.1.1.2. By advancing one thread, the 2ndthread lead shall be measured over 6 threads

(2 interval) and shall not exceed 0.006.5.1.1.3. Joint thread leads shall be measured over a 5 threads (1-1/2 interval) and shallnot exceed 0.005.

5.1.2. Three and a Half Threads per Inch (3.5 TPI)5.1.2.1. The 1

stlead shall be measured over 4 threads (1 interval) and shall not exceed

0.003.

5.1.2.2. By advancing one thread, the 2ndthread lead shall be measured over 4 threads(1 interval) and shall not exceed 0.003.

0.060

0.060

Pin Seal


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5.1.2.3. Joint thread leads shall be measured over 7 threads (2 interval) and shall notexceed 0.006.

5.2.Box Outside Diameter: The outside diameter of the box shall be measured at a distance of5/8-7/8 from the primary make-up shoulder. Measurements shall be taken around the

circumference to determine the minimum diameter. (Reference the appropriate FieldInspection Drawing)

5.3.Box Counterbore Diameter: The box counterbore diameter shall be verified. This dimensioncan be used to determine box swell and the need to verify connection length.

5.4.Box Counterbore Wall Thickness: The wall thickness between the Box Outside Diameterand Box Counterbore Diameter shall be measured to insure that it exceeds the minimum

dimension. (Reference the appropriate Field Inspection Drawing)

5.5.Box Connection Length: The distance between the primary and secondary shoulders shall be

verified in two locations 180apart. (Reference the appropriate Field Inspection Drawing)

5.5.1. Repair of connection length non-conformances may be accomplished as noted below.5.5.1.1. If the connection length exceeds the specified dimension, repair by refacing the

primary shoulder.5.5.1.2. If the connection length is less than the specified dimension, repair by refacing

the secondary shoulder.

5.5.1.3. Refacing limits are the same as for repair of damaged shoulders.

5.5.2. Repair by Refacing General5.5.2.1. Refacing may be required due to torque shoulder damage and/or connection

length discrepancies. Connection lengths must be held to the specifications on theappropriate Field Inspection Drawing.5.5.2.2. Machine refacing in a lathe is the preferred method.5.5.2.3. Portable field refacing units designed specifically for NOV Grant Prideco

TurboTorque connections are acceptable. A minimum of four measurements shall

be taken when using a portable field refacing unit. The variability of face flatnessand squareness is introduced and should be monitored. Should any measurement be

found to be outside the drawing limits, the connection will be deemed as rejected.

5.6.Pin Nose Diameter: The outside diameter of the pin nose shall be verified. This dimension canbe used to test for pin nose swell and the need to verify connection length.

5.7.Pin Connection Length: The distance between the primary and secondary shoulders shall be

verified in two locations 180apart. (Reference the appropriate Field Inspection Drawing)

5.7.1. Repair of connection length non-conformances may be accomplished as noted below.5.7.1.1. If the connection length exceeds the specified dimension, repair by refacing the

secondary shoulder (pin nose).5.7.1.2. If the connection length is less than the specified dimension, repair by refacing

the primary shoulder.


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5.7.1.3. Refacing limits are the same as for repair of damaged shoulders.

5.7.2. Repair by Refacing See section 5.5.2

5.8.Tong Length: A minimum tong space requirement of 6" for pins and a minimum box tong

space equal to the connection length +1" or 8" minimum, whichever is greater.

6. Shop Redressing of TurboTorque-M Shoulders and Radial Seal: To correct connection length ordamage to sealing surfaces, the TurboTorque-M connection must be redressed by facilities thathave been specifically qualified by NOV Grant Prideco to perform this operation. All three

surfaces (Primary shoulder, Secondary shoulder, and 15Seal) shall be redressed in one operationin accordance withRedressing Thread Drawing. See requirements for refacing benchmark after

machining (Para. 4.1.2. above.)

7. Re-threading: This method shall be used to repair connections that fail to meet the requirementsstipulated in this inspection procedure. Performance of this operation may not require complete

removal of the thread body if sufficient material can be removed to comply with the new productrequirements. The connection does not have to be blanked; however, all torque shoulders, sealsurfaces, and thread elements must be machined to 100% bright metal. This is not necessary for

cylindrical diameters. After completion, the connection must be hot phosphate coated. (Copper

Sulfate is not an acceptable substitute for re-threaded connections.)

7.1.Bevel Diameter: If the tool joint outer diameter falls below the bevel diameter, a 1/32 by 45degree chamfer shall be used. The exact value of the bevel diameter is indicated in theTurboTorque or TurboTorque-M Connection Field Inspection Dimension drawing for

the specified connection. Due to insufficient room to machine the Xmarkbenchmark, the

Xmark shall be replaced with an H-SeriesBenchmark.

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