SOP III-306 R00

VOLUME III – USED DRILL PIPE

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 1 of 23

STANDARD OPERATING PROCEDURE (Company Confidential)

NDT Systems EMI Unit

STANDARD OPERATING PROCEDURE FOR NDT SYSTEMS EMI UNIT

NOTE: This document is considered COMPANY CONFIDENTIAL and is not to be distributed in whole or in part outside the Company, without the express, written consent of the undersigned authority.

PROCEDURE APPROVAL: ___________________________ DATE: _____________ Vice President Inspection & Coating Product Line

PROCEDURE APPROVAL: ___________________________ DATE: ______________ Director Quality & Technical Services

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 2 of 23

NDT Systems EMI Unit

INTRODUCTION The intent of this document is to serve as a general operating guide for the NDT Systems Electromagnetic Inspection System. Accuracy in adherence to these minimum requirements for preparation, standardization and operation of the inspection system will provide for detection of linear and/or nonlinear imperfections and evaluation of wall thickness on used drill pipe. The SONOSCOPE® station employs the electromagnetic method for detection of linear and/or nonlinear imperfections and the ISOLOG® wall thickness station uses the Gamma Ray method for measurement of wall thickness.

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 3 of 23

NDT Systems EMI Unit

TABLE OF CONTENTS 1.0 2.0 3.0 4.0

Scope............................................................................................................................................ 4 Personnel Requirements.............................................................................................................. 5 Radiation Requirements............................................................................................................... 5 Equipment Requirements............................................................................................................. 5 4.3 SONOSCOPE® Head ....................................................................................................... 5 4.6 Equipment Calibration........................................................................................................ 6 5.0 Initial Setup ................................................................................................................................... 6 5.1.1 SONOSCOPE® Detector Size Change ...........................................................6 5.1.2 ISOLOG® - 5700..............................................................................................6 5.1.3 ISOLOG® - 6000 Modified ...............................................................................6 5.2 Rotating Head and Pipe Speeds ...................................................................................7 5.3 Gamma Ray System High Voltage and V-blocks Settings............................................8 5.3.2 High Voltage.....................................................................................................8 5.3.3 V-block Adjustment ..........................................................................................8 6.0 Reference Standards ................................................................................................................... 8 6.1 Flux-leakage Reference Standard ..................................................................................... 8 6.2 Gamma Ray Wall Thickness Reference Standard............................................................ 9 7.0 Static Flux-Leakage Inspection Standardization.......................................................................... 9 7.2 SONOSCOPE® Sensor Standardization.......................................................................... 9 8.0 Gamma Ray Wall Thickness Standardization ........................................................................... 10 8.1 Sensitivity Adjustment ...................................................................................................... 10 9.0 Dynamic Standardization ........................................................................................................... 11 10.0 Periodic Checks.......................................................................................................................... 12 11.0 Inspection Procedures................................................................................................................ 13 11.9 Non-computerized Units................................................................................................... 15 12.0 Acceptance Criteria .................................................................................................................... 15 13.0 Post Inspection Procedures ....................................................................................................... 16 Table 5.2.1 – Rotating Head Speed..................................................................................................... 16 Table 5.2.2.a-1 – 6000 Conveyor Roller Reading Conversion ............................................................ 17 Table 5.2.2.a-2 – 6000 Modified Conveyor Roller Reading Conversion ............................................. 18 Table 5.2.2.a-3 – 5700 and 5700 Modified Conveyor Roller Reading Conversion............................. 19 Table 5.2.2.a-4 – 3500 and 5500 Conveyor Roller Reading Conversion............................................ 20 Table 5.3.2 – High Voltage Power Supply Values ............................................................................... 21 Figure 8.1-a – Thru-Wall....................................................................................................................... 22 Figure 8.1-b – Chord Wall .................................................................................................................... 23

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 4 of 23

STANDARD OPERATING PROCEDURE (Company Confidential)

1.0

NDT Systems EMI Unit

SCOPE 1.1

This procedure establishes the minimum requirements related to electromagnetic flux leakage inspection (EMI) and wall thickness inspections, utilizing an NDT Systems EMI unit. This procedure is applicable to used ferromagnetic drill pipe.

1.2

The techniques utilized in this inspection include: 1.2.1

SONOSCOPE®. Longitudinal magnetic field, flux leakage inspection to detect transversely oriented defects (Stationary Head).

1.2.2

ISOLOG®. Gamma Ray wall thickness inspection to detect thin or eccentric wall in the pipe body.

1.3

The minimum pipe length capability is 14 feet (4,3 m).

1.4

This Tuboscope document is the controlling document whenever any other like kind prior-dated Tuboscope inspection procedures are in conflict.

1.5

The latest revision of the following documents were used as references for establishing this procedure: 1.5.1

A.P.I. Specification 5D - Drill Pipe.

1.5.2

A.P.I. Recommended Practice 7G - Recommended Practice for Drill Stem Design and Operating Limits.

1.5.3

A.S.T.M. E 570 - Standard Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products.

1.5.4

Standard DS-1, Drill Stem Design and Inspection.

1.5.5

NS-2 – North Sea Drillstring Inspection Standard.

1.5.6

SOP III-001 - General Requirements.

1.5.7

SOP III-002 - Evaluation of Pipe Body Imperfections.

1.5.8

SOP III-200 – Magnetic Particle Inspection.

1.5.9

SOP III-403 - Manual Ultrasonic Thickness Gauging. Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

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NDT Systems EMI Unit

1.5.10 NDT Systems EMI Unit Operation Manual. 1.5.11 Quality System Procedure, QSP-42-02 – Control of Records. 2.0

PERSONNEL REQUIREMENTS Personnel performing the inspection techniques outlined in this procedure shall be certified in Magnetic Flux Leakage Testing (code 50) and qualified in NDT Systems EMI Unit (code 21) and Radiation Safety (code 98) in accordance with 4.0 of SOP III001.

3.0

RADIATION REQUIREMENTS Operators and/or inspectors charged with responsibility for the NDT Systems EMI Unit must be thoroughly familiar with the information contained in the Tuboscope Radiation Safety Standard Operating Procedures (SOPs) outlined in 5.0 of SOP III-001.

4.0

EQUIPMENT REQUIREMENTS 4.1

Some units are equipped with a computerized data acquisition system which provides a computer screen analog display (stored on cassette tape) for each piece inspected and a hard copy Flag Report summary list of all flux-leakage indications exceeding a selected threshold. The Flag Report provides the longitudinal location, relative amplitude and relative orientation of each indication.

4.2

Units not equipped with the computerized data acquisition system will have either a mechanical or thermal strip chart recorder. 4.2.1

For mechanical chart recorders, the stylus pressure shall be verified whenever they are not inking properly and after replacement or repair. a. Stylus pressure shall be between 18 and 23 grams.

4.3

SONOSCOPE® Head. Flux leakage detector housings shall be checked to ensure that they are set properly against the pipe surface. 4.3.1

All stationary detector housings shall have a curved wear surface and shall be the required size for the pipe being inspected.

4.3.2

Rotating head flux leakage detectors shall be removed or backed off beyond the diameter of the tool joint to prevent damage and contact with Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 6 of 23

NDT Systems EMI Unit

tool joints. 4.3.3

5.0

Magnetizing pole pieces shall be removed from the rotating head.

4.4

The applicable equipment for investigation prove-up of indications as described in SOP III-002.

4.5

A radiation survey meter for monitoring radiation levels around the radioactive source at the required intervals.

4.6

Equipment Calibration. Equipment calibration/verification shall be in accordance with 9.1 of SOP III-001. 4.6.1

Magnetizing source ammeters, the magnetic pulser, radiation survey meter and RPM and FPM meters (for displaying rotating head and conveyor speeds) shall be calibrated when repaired, whenever an erratic response is indicated and after any repairs and at the frequency specified in Table 9.1 in SOP III-001.

4.6.2

If used for pipe measurement, the encoder wheel accuracy for measuring pipe length shall be verified after any repairs, replacement and at the frequency specified in Table 9.1 in SOP III-001.

INITIAL SETUP 5.1

Ensure that the following mechanical adjustments have been made to the equipment to accommodate the pipe size to be inspected and that these adjustments are in accordance with the applicable equipment operation manual. 5.1.1

SONOSCOPE® Detector Size Change. For units with air actuated transverse detectors, the air pressure should be set at approximately 60 psi (414 kPa).

5.1.2

ISOLOG® - 5700. For all 5700 units, the position of the gamma ray detector shall be positioned for thru-wall inspection only on 2-3/8 inch (60,3 mm), 2-7/8 inch (73,0 mm) and 3-½ inch (88,9 mm) material. For all other sizes, the gamma ray detector shall be positioned for chord inspection.

5.1.3

ISOLOG® - 6000 Modified. For all 6000 Modified units, the position of the gamma ray detector shall be positioned for thru-wall inspection only on 2-3/8 inch (60,3 mm), 2-7/8 inch (73,0 mm), 3-½ inch (88,9 mm) Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 7 of 23

NDT Systems EMI Unit

and 4.0 inch (101,6mm) material. All other sizes will have both the Chord and Thru-wall inspection simultaneous. 5.1.4

The pipe shall be centered in the rotating head so that it is level with the center section of the unit. The pipe handling equipment shall function in a smooth and controlled manner during the inspection process.

5.1.5

Conveyor speed adjustment.

5.1.6

Photoelectric cell timing (for automatic pinch roller opening/closing).

5.1.7

For 5700 and 6000 Modified units, the pinch roller sleeves shall be installed if inspecting sizes below 2-3/8 inch (60,3 mm) on the 5700 unit and below 4-1/2 (114,3 mm) on the 6000 unit.

NOTE: For modified units with the larger size pinch roll installed, the sleeves are not required. 5.1.8

For computerized units, complete all the required data entries on the "Select Job" option from the main menu. a. Set the LEADING and TRAILING MASK for each system at the lowest value which does not cause excessive prove-up.

5.2

Rotating Head and Pipe Speeds. 5.2.1

The RPM of the rotating head shall be set in accordance with Table 5.2.1.

NOTE: The rotating head speed values in Table 5.2.1 are not hard numbers. Deviation is permitted to the extent required to comply with 7.2.5.a. 5.2.2

The linear speed of the pipe through the unit shall not be less than 45 feet per minute (FPM) (13,7 mpm) nor greater than 75 FPM (22,9 MPM). a. For non-computerized systems, refer to the conveyor roller reading conversion tables for the applicable unit, Tables 5.2.2.a - 1 through 5.2.2.a - 4, to determine the FPM value for the applicable pipe size.

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

5.3

Effective Date August 1, 2005

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NDT Systems EMI Unit

Gamma Ray System High Voltage and V-block Settings 5.3.1

Personnel working in close proximity to the radiation source shall observe the required safety precautions. Only personnel which are certified in radiation safety shall perform the actual static gamma ray standardization.

5.3.2

High Voltage. The high voltage power supply must be reset, for each pipe size inspected, in accordance with 5.3.2.a through 5.3.2.c. The following steps shall be performed for the thru-wall system and the chord system (if applicable). a. The source should still be closed at this point. Fully open the Vblocks on the source. Open the source. Set meter control switch to the STD position. b. Rotate the head until the source is on the bottom. Place the 1.0 x 0.90 inch (25,4 x 22,9 mm) steel reference block over the source port with the 1.0 inch (25,4 mm) thick portion covering the source. c. Adjust the high voltage to the value specified in Table 5.3.2 for each system being adjusted. Remove steel reference block, when completed.

NOTE: The source should always be left closed when not inspecting pipe to maximize the life of the crystal in the detector(s). 5.3.3

V-block Adjustment. Set meter control switch to the RAD position and close V-blocks. Very slowly pull out each V-block until the appropriate meter reads 0.6, carefully tighten each set screw and re-check the meter setting.

NOTE: It is possible, while pulling the V-block out, for the meter to go past the 0.6 reading and then come back. This condition is known as "Foldover". Stop when the meter first reaches the 0.6 reading. a. Repeat 5.3.3 for the chord system (if applicable). 6.0

REFERENCE STANDARDS 6.1

Flux-leakage Reference Standard Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 9 of 23

STANDARD OPERATING PROCEDURE (Company Confidential)

6.2

NDT Systems EMI Unit

6.1.1

The reference standard used to standardize flux-leakage inspections shall be prepared from a length of pipe of the same specified diameter as the material to be inspected.

6.1.2

Holes and notches shall be manufactured and controlled in accordance with the applicable requirements of SOP III-600.

6.1.3

The reference standard shall be clearly marked as such and made accessible for periodic checks after its use for standardization.

Gamma Ray Wall Thickness Reference Standard 6.2.1

The flux-leakage standard is normally used for standardization of the wall thickness inspection, unless specified otherwise by the customer.

6.2.2

Ultrasonic thickness measurements shall be made around the reference standard to locate an eccentric area to be used to standardize the gamma ray wall thickness instrumentation.

6.2.3

Once located, take one (1) wall thickness measurement every inch (25,4 mm), for the entire circumference of the pipe. All measurements shall be taken in the same circumferential plane. Note the high and low reading for standardization of the chart, to be performed later. Mark the high and low readings on the pipe surface. A suitable paint marker shall be used to ensure the information is retained for subsequent periodic checks. a. The thinnest and thickest wall readings shall be recorded on an inspection worksheet and maintained for reference throughout the job.

7.0

STATIC FLUX-LEAKAGE INSPECTION STANDARDIZATION 7.1

Prior to standardization, all instrumentation shall be turned on and allowed to warm-up for a minimum of 30 minutes. Power to the mag coil power supplies shall be left off during this time and the radiation source shall be kept closed and locked.

NOTE: Ensure that the longitudinal mag coil power supply is not ON at anytime during the inspection of used drill pipe. 7.2

SONOSCOPE® Sensor Standardization. For pipe sizes 5-1/2 inch (139,7 mm) and smaller on 6000 Modified units and 2-7/8 inch (73,0 mm) and smaller on Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 10 of 23

NDT Systems EMI Unit

3500 and 5500 units, jumper wires shall be placed across unused terminals. Place the INPUT MODE switch to the proper position for the number of detectors utilized. Each transverse sensor shall be standardized independently of each other using the magnetic pulser. All sensors shall be within " 10% of each other at the completion of this standardization. This shall be accomplished as follows.

8.0

7.2.1

Ensure that the transverse mag coil power is OFF.

7.2.2

Ensure that the pulser power switch is ON. Place pulser head against one (1) of the transverse detectors such that the Allen bolt is in direct contact with the middle of the sensor. Move the pulser head around slightly to obtain the maximum response from that sensor. Adjust the gain of the sensor to 20 mm, minimum.

7.2.3

Repeat step 7.2.2 for the other channels in the transverse system.

7.2.4

This process shall be repeated at the beginning of each shift as part of the periodic standardization checks.

ISOLOG® GAMMA RAY WALL THICKNESS STANDARDIZATION 8.1

Sensitivity Adjustment (Refer to Figure 8.1-a and 8.1-b). Ensure that the gamma ray head assembly is rotating at the correct RPM as specified in 5.2. Place the section of material marked with the known wall thickness under the rotating source. Place the meter control switch to the CAL/RUN position. 8.1.1

The GALVO RESPONSE selector switch, shall be set on position #1, unless the inspection trace becomes too distorted (noisy). In this case position #2 may be used. Use of positions #3 and #4 are prohibited due to loss of sensitivity.

8.1.2

Press the AUTO-ZERO button to restore the meter and trace baselines. The top of the displayed swing represents the high wall thickness measurement. The bottom of the displayed swing represents the low wall thickness measurement.

8.1.3

Adjust the PEN CENTERING control to position the portion of the trace which represent specified wall at center scale of the chart width.

8.1.4

Adjustment of the SENSITIVITY control will narrow or increase the amount of galvo swing. Adjust the SENSITIVITY control for the ThruCopyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

Effective Date August 1, 2005

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NDT Systems EMI Unit

wall until the trace deflection represents 2%/mm of specified wall thickness, as specified in Table 5.2.1 and as shown in Figure 8.1-a. Adjust the SENSITIVITY control for the Chord until the trace deflection represents 1%/mm of specified wall thickness, as specified in Table 5.2.1 and as shown in Figure 8.1-b. a. When a thermal chart recorder is used and the reference standard wall thickness values obtained in 6.2.3 show eccentricity > 5%, the chord SENSITIVITY control may be adjusted until the trace deflection represents 2%/mm of specified wall thickness.

9.0

8.2

The threshold for each wall thickness trace shall be at 85% of the specified wall thickness (also specified in Table 5.2.1). For non-computerized units, that places the Thru-wall threshold at 5 mm, as shown in Figure 8.1-a and the Chord at 10 mm, as shown in Figure 8.1-b, below the center of the chart, respectively.

8.3

Subsequent passes of the reference standard through the inspection sequence shall produce wall readings, at the location of the ultrasonic measurements, that do not vary from the initial standardization readings by more than " 0.010 inch (" 0,25 mm).

DYNAMIC STANDARDIZATION 9.1

Ensure that the rotating head is rotating at the correct RPM and the conveyor speed is the correct FPM as determined in 5.2.

9.2

Ensure that the longitudinal mag coil power supply is turned OFF.

9.3

Adjust the transverse mag coil power supply to obtain a minimum response from the reference indicator (holes or notches) of 15 mm or at least to the value required to obtain a three (3) to one (1) signal-to-noise ratio.

9.4

If notches are used instead of drilled holes, place the notch at 12:00 o'clock, pass the reference standard through the complete inspection sequence of the EMI unit.

9.5

Repeat 9.4 three (3) additional times, with the notch at the 3, 6 and 9 o'clock positions.

9.6

A strip chart recording or computer image of each pass shall be retained for record. Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

9.7

Effective Date August 1, 2005

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NDT Systems EMI Unit

The lowest reference signal amplitude from a reference indicator shall be more than 70% of its highest signal amplitude for all passes.

10.0 PERIODIC CHECKS 10.1 For each length of pipe inspected the magnetization current shall not be less than 90% of its original value used for standardization, excluding current variations at the pipe ends. 10.2 A minimum of once every 50 pieces of pipe inspected assure that: 10.2.1 All pinch rolls are clamping on the pipe with the required pressure. 10.2.2 The rotating head speed is not less than 95% nor more than 110% of its original value used for standardization. 10.2.3 The pipe speed is not less than 90% nor more than 105% of its original value used for standardization, when the pinch rolls are clamping on the pipe. 10.2.4 Each detector wear surface shall be contacting the pipe surface. 10.3 Additionally, once every 50 pieces inspected, the reference standard shall be inspected (and the recordings and image traces retained for storage) with reference indicators placed at the o’clock position which produced the weakest response during the initial dynamic standardization. 10.4 The reference standard shall be inspected at all four (4) o'clock positions stated in 9.5 as follows: 10.4.1 At the beginning and ending of each inspection shift and after meal break. 10.4.2 A minimum of once every four (4) hours of operation. 10.4.3 After any power interruption. 10.4.4 Prior to equipment shutdown during or at the end of the inspection job. 10.4.5 Prior to resuming operation after repair or change to a system Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

Effective Date August 1, 2005

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NDT Systems EMI Unit

component that would affect standardization. NOTE: The primary purpose of a periodic check is to assure that a consistent equipment response is being maintained throughout the inspection job; therefore the signals used to monitor repeatability do not have to meet specific classification threshold requirements. 10.5 An unacceptable check shall require correction to achieve the sensitivity levels of the original standardization for the affected inspection technique. Acceptable pipe inspected since the last acceptable check shall be re-inspected if one (1) or more of the following conditions exist: 10.5.1 One (1) or more of the flux-leakage detectors is not contacting the pipe surface. 10.5.2 The current for the longitudinal or transverse magnetic field has dropped below the minimum requirement stated in 10.1. 10.5.3 Any dynamic standardization run which produces a signal height below the threshold. This condition requires re-standardization. 10.5.4 The minimum gamma ray chord and average thru-wall reading do not meet the requirements of 8.3. 10.5.5 During the inspection process the rotating head speed is less than the requirement of 10.2.2 or the pipe speed is more than the requirement of 10.2.3. 10.6 The transverse flux-leakage detectors shall be checked with the magnetic pulser (in accordance with 7.2) a minimum of once each shift and whenever a detector is replaced, an associated electronic circuit has been altered, an associated cable has been reconnected or associated power has been interrupted. 10.7 The Gamma High Voltage and V-block Settings shall be checked (in accordance with 5.3) a minimum of once each shift. 11.0 INSPECTION PROCEDURES 11.1 Pipe identification shall be in accordance with the applicable requirements of SOP III-001. 11.2 The external surface of the pipe shall be cleaned as needed to prevent visible Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

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pipe slippage in the drive rollers of the unit and to assure that all flux-leakage detectors contact the pipe surface during inspection. False indications or detector lift-off caused by such objects shall be further investigated in accordance 11.6 or 11.7, as applicable, after removal. 11.3 If applicable, chart recorder paper speed shall be adjusted such that 2 feet (61 cm) of pipe is equal to approximately ½ inch (1,3 cm) of chart paper. 11.4 Each pipe shall be passed through the EMI unit for its entire length. Inspection speed shall meet the same requirements as for standardization. 11.5 If holes are used, the preliminary threshold shall be set at 70% of the lowest hole signal (also specified in Table 5.2.1). If notches are used, the preliminary threshold shall be set at 70% of the lowest notch signal (from the 4 quadrant passes in 9.5) for the flux leakage channel (also specified in Table 5.2.1). Indication amplitudes lower than the threshold may be evaluated at the discretion of the operator. The preliminary threshold level may be adjusted after sufficient prove-up has determined a decrease in sensitivity is warranted. 11.6 For computerized units, flux-leakage and wall thickness indications that show on the data acquisition display, breaking their respective pre-established thresholds are summarized on a Flag Report and automatically paint sprayed on the pipe’s external surface. The Flag Report is printed out for use by the evaluation personnel. 11.6.1 Indications which are manually flagged must be manually measured from the pipe end to determine their location. 11.7 For non-computerized units, any indication that appears on any flux leakage channel of the recording system exceeding the pre-determined threshold shall be backed up and re-run to determine if the indication is repeatable. If the indication repeats, the location of the indication shall be marked on the pipe's external surface next to the inspection station which identified the imperfection. 11.7.1 Gamma ray wall thickness indications below the 85% threshold level shall be marked for evaluation on the pipe's external surface next to the wall thickness inspection station. a. Gamma ray wall thickness indications which appear to have irregular patterns to their swing such as a flat crest and valley to the saw tooth pattern may indicate a thinner area than the trace indicates. This type of indication shall be investigated to ensure they are acceptable. Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

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11.7.2 The Operator shall make a notation on the chart next to the indication to signify that the indication will be investigated. 11.7.3 The location and type of imperfection identified by the EMI unit shall be recorded on the run sheet by length number. The evaluation personnel shall use the run sheet as a checklist to assure prove-up of all indications. 11.8

For computerized units, the Flag Report shall be used to identify the type of indication to be evaluated at each paint marked location. All indications shall be evaluated for a distance of 4 inches (10 cm) on each side of the paint mark for the entire circumference of the pipe.

11.9

Non-computerized Units. 11.9.1

For transverse indication areas, the area adjacent to mark representing the actual area where the detector was riding shall be evaluated for a distance of 8 inches (20 cm), for the entire circumference of the pipe.

11.9.2

For wall thickness indication areas, the area adjacent to mark representing the actual area where the gamma ray detector was measuring the wall thickness shall be evaluated for a distance of 6 inches (15 cm), for the entire circumference of the pipe.

11.10 Relevant flux-leakage indications shall be investigated in accordance with 7.0 of SOP III-002. 11.11 Gamma ray wall thickness indications shall be evaluated in accordance with 6.2 of SOP III-403. 11.12 If the imperfection identified by the unit is cause to down-grade the pipe, the results of the evaluation shall also be documented in the Remarks column of the Drill Pipe Inspection Report by length number. 11.13 After completion of the EMI inspection, it is mandatory to inspect the upset runout area with magnetic particles. See 14.0 in SOP III-200. 12.0 ACCEPTANCE CRITERIA Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

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NDT Systems EMI Unit

Unless specified otherwise, acceptance criteria shall be in accordance with the applicable requirements in the applicable Table 7.2.3 – 1 through 7.2.3 - 18 of SOP III002. 13.0 POST INSPECTION PROCEDURES 9.1

Unless specified otherwise by the customer, the applicable requirements of SOP III-001 shall be followed when the last inspection service is completed on each pipe.

9.2

Strip chart recordings and computer electronic media shall be retained in accordance with QSP-42-02. Table 5.2.1 – Rotating Head Speed Pipe Size Head RPM Inches mm 6-5/8 to 7-5/8 152,4 to 177,8 100 4 to 5-1/2 101,6 to 127,0 110 1.315 to 3-1/2 33,4 to 76,2 130

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

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STANDARD OPERATING PROCEDURE (Company Confidential)

NDT Systems EMI Unit

Table 5.2.2.a – 1 – 6000 Conveyor Roller Reading Conversion Pipe Size (inches) Conveyor Reading 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80

4-1/2

5

5-1/2

6-5/8 &7

7-5/8

8-5/8

9-5/8

10-3/4

11-3/4

12-3/4 & 13-3/8

Feet Per Minute (FPM)

46 48 50 52 54 55 57 59 61 63 65 66 68 70 72 74

45 47 49 51 53 54 56 58 60 62 64 66 68 69 71 73 75

46 48 50 51 53 55 57 59 61 63 65 67 69 70 72 74

45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75

46 48 50 52 54 56 58 60 62 64 66 68 70 72 74

46 48 50 52 54 56 58 60 62 64 66 69 71 73 75

47 49 51 53 55 57 59 61 63 66 68 70 72 74

46 48 51 53 55 57 59 62 64 66 68 70 73 75

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

45 48 50 52 55 57 59 61 64 66 68 70 73 75

47 49 51 53 56 58 60 63 65 67 70 72 74

VOLUME III – USED DRILL PIPE

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 18 of 23

STANDARD OPERATING PROCEDURE (Company Confidential)

NDT Systems EMI Unit

Table 5.2.2.a – 2 – 6000 Modified* Conveyor Roller Reading Conversion Pipe Size 2-3/8 2-7/8 3-1/2 4-1/2 5 & &4 5-1/2 (inches)

6-5/8

Conveyor Reading 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66

7& 7-5/8

8-5/8

9-5/8

10-3/4

11-3/4

46 49 52 54 57 60 63 65 68 71 73

47 50 53 56 58 61 64 67 70 72 75

12-3/4

13-3/8

46 49 51 54 57 60 63 66 69 72 74

47 50 53 55 58 61 64 67 70 73 76

Feet Per Minute (FPM)

45 47 49 52 54 56 58 60 63 65 67 69 72 74

46 48 51 53 55 57 60 62 64 67 69 71 74

47 49 51 54 56 59 61 63 66 68 70 73 75

45 48 50 52 55 57 60 62 64 67 69 71 74

46 49 51 54 56 59 61 63 66 68 71 73

45 48 50 53 55 58 60 63 65 68 70 73 75

46 49 51 54 56 59 61 64 67 69 72 74

47 49 52 55 57 60 62 65 68 70 73 75

45 48 51 53 56 59 61 64 67 69 72 74

* - The roller modification to these units is either by a sleeve or a larger than standard roller size.

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 19 of 23

STANDARD OPERATING PROCEDURE (Company Confidential)

NDT Systems EMI Unit

Table 5.2.2.a – 3 – 5700 and 5700 Modified* Conveyor Roller Reading Conversion Pipe Size 1.315, 1.660, (inches) 1.990 & 2.063

2-3/8

Conveyor Reading 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60

2-7/8, 3-1/2 & 4

4-1/2

5 & 5-1/2

6-5/8 & 7

7-5/8

45 47 50 53 56 59 61 64 67 70 73 75

46 49 51 54 57 60 63 66 69 71 74

Feet Per Minute (FPM)

45 48 50 53 55 58 60 63 65 68 70 73 75

46 49 51 54 56 59 62 64 67 69 72 74

45 47 50 53 55 58 61 63 66 68 71 74

45 48 51 53 56 59 61 64 67 69 72 75

46 49 52 55 57 60 63 65 68 71 74

* - The roller modification to these units is either by a sleeve or a larger than standard roller size.

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 20 of 23

STANDARD OPERATING PROCEDURE (Company Confidential)

NDT Systems EMI Unit

Table 5.2.2.a – 4 – 3500 and 5500 Conveyor Roller Reading Conversion Pipe Size (inches)

1.315

1.660 & 2.063 & 1.990 2-3/8

Conveyor Reading 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58

2-7/8

3-1/2 & 4

4-1/2

5 & 51/2

Feet Per Minute (FPM)

46 49 51 54 56 59 62 64 67 69 72 74

45 47 50 53 55 58 61 63 66 68 71 74

46 49 51 54 57 59 62 65 68 70 73

47 50 53 56 58 61 64 67 69 72 75

49 51 54 57 60 63 66 69 71 74

47 50 53 56 59 61 64 67 70 73 76

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

45 48 51 54 57 60 63 66 69 72 75

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 21 of 23

NDT Systems EMI Unit

Table 5.3.2 - High Voltage Power Supply Values 6000 Units Pipe Diameter

Thru-Wall

Chord

114.3

0.73

0.64

5.000

127.0

0.71

0.64

5.500

139.7

0.70

0.64

6.625

168.3

0.65

0.59

7.000

177.8

0.63

0.57

7.625

193.7

0.61

0.54

8.625

219.1

0.56

0.51

9.625

244.5

0.52

0.48

10.750 - 13.375

273.1 - 339.7

0.48

0.44

Inches

mm

4.500

3500, 5500, 5700 and 6000 Units 1.315 - 3.500

33.4 - 88.9

all other sizes

0.65 0.65

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 22 of 23

VOLUME III – USED DRILL PIPE STANDARD OPERATING PROCEDURE (Company Confidential)

NDT Systems EMI Unit

Represents “High” Wall Thickness = 0.376"

1 mm = 2% or 0.007"

Center Scale = Specified Wall Thickness, 0.362"

Represents “Low” Wall Thickness = 0.348"

85% Threshold = 0.308" Actual threshold line = 0.311"

Figure 8.1-a – Thru-Wall

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001

VOLUME III – USED DRILL PIPE

Effective Date August 1, 2005

SOP No. III-306

Revision No. 0

Page No. 23 of 23

STANDARD OPERATING PROCEDURE (Company Confidential)

NDT Systems EMI Unit

Represents “High” Wall Thickness = 0.376"

1 mm = 2% or 0.007"

Center Scale = Specified Wall Thickness, 0.362"

Represents “Low” Wall Thickness = 0.348"

85% Threshold = 0.308" Actual threshold line = 0.311"

Figure 8.1-b – Chord Wall

Copyright © 2005 Tuboscope, P.O. Box 808, Houston, Texas 77001