sop iii-300 r00

Issued Date August 1, 2005

SOP No. III-300

VOLUME III USED DRILL PIPE Revision 0 Page No. 1 of 13 STANDARD OPERATING PROCEDURE

(Company Confidential) SV3 Electromagnetic Inspection

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

STANDARD OPERATING PROCEDURE

FOR

SV3 ELECTROMAGNETIC INSPECTION 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


SOP No. III-300




INTRODUCTION

This document establishes the minimum requirements for inspection of Used Drill Pipe using the SV3 Inspection System. In addition, it contains information pertaining to unit set up and standardization. Adherence to these requirements are mandatory unless Customer Specifications dictate otherwise, in which case, the customer specifications must be documented on the inspection report.


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TABLE OF CONTENTS 1.0 Scope............................................................................................................................................ 4 2.0 Personnel Requirements.............................................................................................................. 5 3.0 Equipment Requirements............................................................................................................. 5 3.1 SV3 Inspection Desk.......................................................................................................... 5 3.4 Equipment Calibration........................................................................................................ 5 4.0 Initial Setup ................................................................................................................................... 5 4.1 Instrument Truck and Jack Positioning.............................................................................. 5 4.2 Applying Power to the Inspection System ......................................................................... 6 4.3 Buggy Assembly and/or Adjustment.................................................................................. 6 5.0 Tuboscope Reference Standards ...........................................................................................6 5.1 Eight (8) Hole Flux Leakage Standard ..........................................................................6 5.2 Wall Thickness Standard ..............................................................................................6 6.0 Standardization............................................................................................................................. 7 6.3 Preliminary Desk Adjustments ........................................................................................... 7 6.4 Positioning the Drill Pipe Standard .................................................................................... 8 6.4.1 Buggy Speed Adjustment..................................................................................... 8 6.5 Chart Speed Adjustment.................................................................................................... 9 6.6 Standardizing the SONOSCOPE Channels ................................................................... 9 6.6.5 Setting Pit Lights to Trigger .................................................................................. 9 6.6.6 Signal Conditioning System Adjustment .............................................................. 9 6.7 Wall Monitor Standardization ........................................................................................... 10 6.7.11 Setting Wall Monitor Flaw Lights to Trigger ....................................................... 10 6.8 Periodic Checks ............................................................................................................... 10 7.0 Inspection Procedures................................................................................................................ 11 8.0 Acceptance Criteria .................................................................................................................... 13 9.0 Post Inspection Procedures ....................................................................................................... 13


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1.0 SCOPE 1.1 This procedure establishes the minimum requirements related to

electromagnetic flux leakage inspection (EMI) utilizing a Tuboscope SV3 drill pipe inspection unit (buggy). This procedure is applicable to used ferromagnetic drill pipe.

1.2 This procedure only covers the pipe body, from upset taper to upset taper. The

upsets and tool joints are not a part of this inspection. 1.3 The techniques utilized in this inspection include a longitudinal magnetic field,

flux leakage inspection to detect transversely oriented imperfections (SONOSCOPE) and a specialized Hall-element wall thickness measurement inspection.

1.4 This Tubsocope document is the controlling document whenever any other like

kind prior-dated Tubsocope 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. 1.5.10 SV3 Unit Operation Manual.


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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 on the SV3 EMI Unit (code 73) in accordance with 4.0 of SOP III-001.

3.0 EQUIPMENT REQUIREMENTS 3.1 SV3 Inspection Desk. The inspection desk contains the thermal strip chart

recorder and the gain controls to establish the threshold of each individual channel.

3.2 Flux leakage detector housings shall be checked to ensure that they are set

properly against the pipe surface. 3.2.1 All detector housings shall have a curved wear surface and shall be the

required size for the pipe being inspected. 3.2.2 Hall element detectors are used with the SV3 inspection system. 3.3 The applicable equipment for investigation prove-up of indications as described

in SOP III-002. 3.4 Equipment Calibration. Equipment calibration/verification shall be in accordance

with 9.1 of SOP I-001. 3.4.1 The magnetizing source ammeter 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.

3.5 A jack system to effectively position the drill pipe above the rack and allow the

buggy to traverse the entire length of the pipe without obstruction. 4.0 INITIAL SETUP 4.1 Instrument Truck and Jack Positioning Establish an appropriate placement for the instrument truck, equipment and jacks at

the pipe rack inspection area. When an ideal set-up position is not possible, the Operator should use good judgment to establish an alternate position that maintains good operational efficiency and safety.


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The following items should be used as a guide in choosing a position for unit operation:

4.1.1 The operator should have a clear view of both jacks, and as much of the

inspection area as possible. NOTE: The operator has the option of positioning the desk inside or outside the

instrument truck. Positioning the desk outside the truck allows greater visibility and accessibility to the pipe.

4.1.2 The chosen location should not block off a road or cause inconvenience at

the pipe yard or drilling location. 4.1.3 Ensure the pipe rack is stable to an extent whereby pipe can be moved

safely and that adequate space is available for rolling the pipe. 4.2 Applying Power to the Inspection System. A sequential application of power

should include steps to prevent potentially hazardous power surges. 4.3 Buggy Assembly and/or Adjustment. The assembly and/or adjustment process

involves: an examination of the eight (8) shoes to ensure free movement; examining centralizer rollers to verify free movement and good condition; clamping the assembly on the pipe to verify the latch is working properly; and rotation of the electric drive motors in both the forward and backward direction also examine the drive wheels to assure they are in good working condition.

5.0 TUBOSCOPE REFERENCE STANDARDS

5.1 Eight (8) Hole Flux Leakage Standard. Only Tuboscope manufactured eight (8) hole reference standards shall be used to standardize the SV3 inspection system as specified in SOP III-001. These reference standards are available from the warehouse.

NOTE: Each NDT Systems buggy inspection system comes with its own eight (8) hole

SONOSCOPE standard. It has been determined after extensive testing by the QTS that when standardizing with the NDT Systems eight (8) hole standard, the inspection system will be set at a lower sensitivity level than when standardizing with the Tuboscope eight (8) hole standard. To obtain proper sensitivity a Tuboscope eight (8) hole Drill Pipe Standard shall be used.

5.2 Wall Thickness Standard. Only Tuboscope manufactured wall reference

standards shall be used to standardize the SV3 inspection system as specified in SOP III-001. These reference standards are available from the warehouse.


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6.0 STANDARDIZATION 6.1 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 supply shall be left off during this time.

6.2 Standardization will involve a POSITIVE MASTER GAIN adjustment, a NEGATIVE

MASTER GAIN adjustment and also a SIGNAL CONDITIONER SYSTEM (SCS) GAIN plus individual shoe CHANNEL GAIN adjustment. Overall SYSTEM GAIN is controlled by use of the POSITIVE AND NEGATIVE MASTER GAIN circuit. In conjunction with adjustment of the MASTER GAIN circuit, uniform electronic sensitivity is maintained through adjustment of the individual shoe CHANNEL GAIN controls.

6.3 Preliminary Desk Adjustments 6.3.1 Positive Master Gain - Set turn pot to 5.0. 6.3.2 Negative Master Gain - Set turn pot to 5.0. 6.3.3 SCS Gain - Set turn pot to 5.0. 6.3.4 SONOSCOPE Shoe Indicator Gains - Set all eight (8) turn pots to 2.0 6.3.5 Switch all eight (8) SONOSCOPE Channels to their OFF position. 6.3.6 Turn the Frequency Response switch to the LOW FREQUENCY or the

(DOWN) position. WARNING: DO NOT INSPECT PIPE WITH THE FREQUENCY RESPONSE SWITCH

IN THE HIGH OR UP POSITION - DEFECTS COULD BE MISSED! 6.3.7 Run strip chart recorder. Adjust the POSITIVE MASTER OFFSET turn pot

until the baseline trace on the top graph is adjusted until slight signal movement is detected from the bottom of the graph (positive indication on strip chart).

NOTE: Each horizontal line on the strip chart represents 5 mm. 6.3.8 Run strip chart recorder. Adjust the NEGATIVE MASTER OFFSET turn

pot until the baseline trace on the second from the top graph signal (negative indication on strip chart) produces a slight baseline signal movement from the top of the graph.


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6.3.9 Run strip chart recorder. Adjust the SCS OFFSET turn pot until the baseline trace on the third from the top graph signal is adjusted until slight baseline signal movement is detected from the bottom of the graph.

6.4 Positioning the Drill Pipe Reference Standard

6.4.1 To accommodate adjustment of the individual shoe channel gains, utilization of the Tuboscope Drill Pipe 8-Hole Standard" is required.

6.4.2 Buggy Speed Adjustment. The recommended buggy speed is 60 fpm

(18,3 mpm) with some slight adjustments required depending upon pipe conditions. Prior to standardizing, measure and mark with chalk a 15 foot (4,6 m) distance on a length of pipe to be inspected. Run and time the buggy assembly, making adjustments until it travels 15 feet (4,6 m) in 15 seconds for a speed of 60 fpm (18,3 mpm).

6.4.3 Place the buggy and mag coil onto the Tuboscope eight (8) hole standard,

with standard's arrow stamp in the direction of buggy travel. Make certain the buggy position is at the beginning of the pipe (end with stamped arrow). The eight (8) hole standards grove shall be positioned at 3:00 o'clock. Due to the shoe orientation on all NDT Systems drill pipe buggy's, shoe 8 will appear first on the strip chart and shoe 1 will appear last (8, 7, 6, 5, 4, 3, 2, 1).

NOTE: During the inspection always place the mag coil in the same position on

the pipe (plug to left) as when standardizing with the eight (8) hole standard. If the mag coil position is reversed (plug to right) the magnetic polarity changes causing the transverse signals to now be displayed on the negative (opposite) side of the strip chart.

6.4.4 Turn all eight (8) SONOSCOPE Channels to their ON position.

6.4.5 Turn the Drill Pipe coil switch to the ON position, then adjust the mag coil current to read approximate 3.8 amps (3.8 amps X 2,000 coil turns = 7600 amp turns) for the following sizes; 6-5/8 inch (168,3 mm), 5-1/2 inch (139,7 mm), 5 inch (127,0 mm), 4-1/2 inch (114,3 mm), 4 inch (101,6 mm).

CAUTION: When inspecting pipe sizes 3-1/2 inch (88,9 mm), 2-7/8 inch (73,0

mm) and 2-3/8 inch (60,3 mm), if amp settings above 3.0, body wall indications will not appear on the strip chart due to the magnetic saturation of the body wall Hall probes.


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6.5 Chart Speed Adjustment. Adjust the chart speed (to setting 3) so that a full length of drill pipe is displayed before the paper enters the paper take-up assembly. Approximately, 18 inches (46 cm) of paper is recommended for a 30 foot (9,1 m) length of drill pipe.

6.6 Standardizing the SONOSCOPE Channels 6.6.1 Instruct a member of the crew to be prepared to guide the buggy along the

Tuboscope eight (8) hole standard once the drive switch is engaged. 6.6.2 Start the buggy by turning the Buggy switch to the forward position. 6.6.3 As the buggy travels over the Tuboscope eight (8) hole standard, eight (8)

signal peaks should be displayed on the strip chart recorder, in order 8-1. 6.6.4 Adjust the individual channel GAINS as necessary to achieve a 15 mm

signal, 1 mm from each channel. 6.6.5 Setting Pit Lights to Trigger. Run the strip chart recorder and hold the

View Threshold switch in the down position then adjust the Threshold turn pot until the trace on the Positive graph reaches a minimum of 20 mm or max. Any signal which registers half (10 mm) will now trigger the appropriate pit light which is located right above the SONOSCOPE Gain Turn Pots. Readjust the pit light threshold level to suit the particular characteristics of the pipe being inspected or the flaw or defect under investigation.

NOTE: If the Master Gain is set too high (above 5.0) the pit light threshold will not be linear!

6.6.6 Signal Conditioner System Adjustment. Run the strip chart recorder and

hold the SCS View Level switch in the down position then adjust the SCS Level turn pot until the trace on the positive graph reaches 6 mm. Now any signal > 6 mm will appear on the SCS graph (third from the TOP). The height of the signal on the SCS graph can be controlled by adjusting the SCS Gain turn pot. During the actual inspection, the SCS level shall be adjusted clockwise only as far as necessary to make the chart readable. When the View Level switch is held in the down position adjust it above any baseline noise level. By setting the level just above the grass line (noise level), the SCS trace will display only signals of particular interest to the operator.

NOTE: No attempt should be made to standardize the SCS trace.


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6.7 Wall Monitor Standardization 6.7.1 Wall Indicator Master Gain - Set turn pot to 5.0. 6.7.2 Wall Indicator Gain - Set all 8 turn pots to 2.0. 6.7.3 Switch all Wall Monitor Channels to their OFF position. 6.7.4 Run Paper Strip Chart Recorder. Adjust the Wall Indicator Master Offset

pot until the bottom graph (wall indicator graph) is in the desired position, baseline from the top of the graph.

6.7.5 Place the drill pipe buggy and coil on the Tuboscope Wall Reduction

Standard, facing in either direction at one (1) end of the pipe. 6.7.6 Adjust the Coil Current turn pot until the current meter reads 3.8 amps for

pipe sizes 6-5/8, 5-1/2, 5, 4-1/2 and 4. For pipe sizes 3-1/2, 2-7/8 and 2-3/8, a current meter amp setting of 3 to 2.5 must be used.

6.7.7 Turn Channel 1 to the ON position, switch the remaining 7 switches OFF. 6.7.8 Start buggy drive by placing the buggy switch to the FORWARD position. 6.7.9 After the buggy passes the wall reduction area, an indication should occur

on the chart. The indication from a wall reduction will occur in a downward direction on the bottom graph trace. If the indication is less than 12 mm, turn the Gain pot clockwise and repeat the buggy run until a 12 mm indication has been established.

6.7.10 Turn Channel 1 OFF and repeat 6.7.6 through 6.7.10 for each remaining

channels, 2-8. 6.7.11 Setting Wall Monitor Flaw Lights to Trigger. Hold the View Threshold

switch in the down position and adjust the Threshold. Adjust Turn pot until the trace on the Wall Indicator Graph reaches 10 mm from the top of the graph. Any signal > 10 mm will trigger the appropriate light above the Wall Indicator Gain turn pots.

NOTE: The Wall Monitor Flaw Light settings must be further adjusted once prove-

up results indicate it necessary. 6.8 Periodic Checks. The reference standard shall be re-run periodically as follows:


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6.8.1 Upon completion of inspection of 24-26 lengths of pipe. 6.8.2 At the beginning and ending of each inspection shift and after meal

break. 6.8.3 A minimum of once every four (4) hours of operation. 6.8.4 After any power interruption. 6.8.5 Prior to equipment shutdown during or at the end of the inspection job. 6.8.6 Prior to resuming operation after repair or change to a system

component that would affect standardization. 6.8.7 An unacceptable check shall require correction to achieve the sensitivity

levels of the original standardization. Acceptable pipe inspected since the last acceptable check shall be re-inspected.

7.0 INSPECTION PROCEDURES 7.1 Pipe identification shall be in accordance with the applicable requirements of

SOP III-001. 7.2 Thick spots of external coating, such as sags or bumps or any other foreign

material attached to the external surface of the pipe, shall be removed prior to inspection. False indications or detector lift-off caused by such objects shall be further investigated in accordance with 7.11 after removal.

7.2.1 Additionally, when inspecting newly coated pipe, visually examine all

detectors for coating build up after inspecting the first five (5) lengths of the order. If coating build up is detected, perform a standardization run prior to removing the coating build up from the detectors. If the standardization run is successful, clean the coating from the detectors and repeat this step after 10 lengths are inspected. Determine the optimum frequency in which the detectors should be cleaned and maintain this throughout the order.

a. If the standardization run is unsuccessful, the customer shall be

notified that the coating must cure further before a successful inspection can be performed.

7.3 After proper standardization procedures are completed the mag coil is placed on


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the first length to be inspected. The length is then placed over the jacks on each end and raised off of the pipe rack.

7.4 At the starting end, place the buggy on the tube, approximately 3 feet (0,9 m)

from the upset taper, facing the upset. Slide the coil onto the holding arms of the buggy. Raise the jacks. Turn on the chart and run the buggy into the upset.

7.5 Turn OFF the chart and lower the jacks. 7.6 The buggy is then placed around the pipe facing the opposite end. Slide the coil

onto the holding arms of the buggy. Pull the assembly as far back against the tool joint as possible. Raise the jacks. Turn on the chart and traverse the assembly down the length.

7.7 Repeat 7.3 through 7.6 for each length to be inspected. 7.8 Inspection speed shall meet the same requirements as for standardization.

7.9 Imperfections located such as fatigue cracks or corrosion pitting will be identified by a signal displayed on the inspection system "strip-chart" and approximately located by the "flaw-light" system.

7.10 The inspection of each length of pipe by use of the inspection system must be

recorded on a strip-chart. The joint number, minimum wall thickness and final classification shall also be recorded on the strip-chart.

7.11 Any indication that appears on the strip chart exceeding 10 mm shall be backed

up and re-run to determine if the indication is repeatable. If the indication repeats, the indication shall be investigated in accordance with 7.0 of SOP III-002.

7.12 Any wall thickness indication that appears on the strip chart below 85% FSH

threshold shall be backed up and re-run to determine if the indication is repeatable. If the indication repeats, the indication shall be investigated in accordance with 6.2 of SOP III-403.

7.13 The actual area where the detector was riding shall be evaluated for a distance of 8 inches (20 cm).

7.14 The Operator shall make a notation on the chart next to the indication to signify

that the indication was investigated and the results of the evaluation. 7.15 If the imperfection identified by the unit is cause to down-grade the pipe, the


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results of the evaluation shall also be documented in the Remarks column of the Drill Pipe Inspection Report by length number.

7.16 After completion of buggy inspection, it is mandatory to inspect the upset runout

area with magnetic particles. See 14.0 in SOP III-200. 8.0 ACCEPTANCE CRITERIA

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 III-002.

9.0 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 shall be retained in accordance with QSP-42-02.

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