CHANGES BETWEEN EDITION-3 & EDITION-4(VOL-3) OF DS-1

1) DS-1 Edt-3 (Jan-2004) divided in to 2 volumes (Vol-3 & Vol-4) in Edt-4. A) Drill string equipment consisting of single piece with no component like drill pipe , drill collar , subs & pup joints etc. covered in Vol-3B) Drill string equipment consisting of assembled from 2 or more components like motors , jars , MWD/LWD tools , underreamers & safety valves are covered in Vol-4 (Edt-4).2) IN TABLE 2.2 (Recommended Inspection Programs For Drill Pipe)A) In Tool joint Cat-5 & HDLS heat checking included in Edt-4.B) EMI 1 & EMI 2 replaced with EMI in Edt-4 and FLUT is recommended for drill pipe wall thickness is greater than 0.400.C) Drill pipe tube Cat-5 U.T wall thickness is added in Edt-4.D) Post inspection marking is included in Edt-4.

3) IN TABLE 2.3 (Recommended Inspection Programs for Other Components)A) For HWDP heat checking inspection in Cat-3to5 added in Edt-4.B) Drill collars & HWDP marking (Post inspection marking) included in Edt-4.C) Safety valves , IBOPS , jars, motors & other not covered in Edt-4 vol-3,these are separated & covered in vol-4.D) Pup joints included in Edt-4.

4) INTABLE 2.4 (Recommended Beginning Inspection Frequency).A) Safety valves , IBOPS , jars, motors & other not covered in Edt-4 vol-3,these are separated & covered in vol-4.5) Conversion factors & fraction tables 2.5 & 2.6 added in Edt-4.6) Inspection Program figures 2.7 to 2.12 included in new edition.7) New Procedures like EMI(same as EMI 2 in Edt-3) , heat checking , wet visible contrast inspection , connection phosphating , hard band re-application , tool joint rebuilding ,pup joint 1 , pup joint 2 , de-magnetization & post inspection marking procedures added in Edt-4. In all procedures calibrated light meter for illumination checking is added in this Edt-4, and minimum intensity is 50 ft-candles given.8) VISUAL TUBE INSPECTIONA) In scope only drill pipe tube coverd in Edt-3 , where as in Edt-4 drill pipe & HWDP tube also covered.B) In Procedure & acceptance criteria(3.4.4.a) 80% of adjacent wall thickness for HWDP shall be cause for rejection , added in new edition.C) Tube crooked dimension does not given in Edt-3 , but in Edt-4 3 in overall length & 0.5 in first 5 mentioned . Straightened area 2ft either side MPI to be done in Edt-4.

9) ULTRASONIC WALL THICKNESS INSPECTION A) The field reference standard mentioned in Edt-3 is Steel , where as in Edt-4 is same acoustic properties. B) Thin and thick section values included in Table 3.6.1 & 3.6.2 in Edt-4.10) EMI (Electromagnetic Inspection) A) In Edt-3 EMI 1 , EMI 2 separate procedures given , where as in Edt-4 only EMI given which is similar to EMI 2.B) In Edt-3 standard pipe (holes) calibration not mentioned , but in Edt-4 drill hole standard shall be certified annually.C) In Edt-4 requirements for wall thickness equipment (3.7.6) wall monitoring equipment may be used after an agreement between the vendor & the customer mentioned.11) MPI SLIP/UPSET INSPECTIONA) In Scope (3.9.1) A.C field only mentioned in Edt-3 , But in Edt-4 A.C field or wet fluorescent magnetic particle technique with an D.C field.B) Area of inspection in box side 48 mentioned in Edt-3 , Where as in Edt-4 box side 48,then the are where the additional slip cuts are located ,including 6 on either side of the location shall also inspected.C) HWDP Centre Pad : In Edt-3 36 either side of centre upsets given. In Edt-4 12 either side of centre upsets mentioned.D) Minimum A.C yoke leg distance 2 mentioned in Edt-4,where as it is not given in Edt-3.E) 3.9.4.d in Edt-4 the intensity of ambient visible light measured at the inspection surface during wet fluorescent magnetic particle inspection shall not exceed 2 ft-candles required . But in Edt-3 is not mentioned.12) UT SLIP/UPSET AREA INSPECTIONA) In Scope (3.10.1) :In Edt-4 HWDP not covered but in Edt-3 36 either side of centre upsets covered. And in drill pipes 6 either side of slip cuts beyond 48 covered in Edt-4 , but in Edt-3 it is not covered.B) Ultrasonic notched standard shall recertified annually included in Edt-4. C) Field reference standard tolerances not given in Edt-3, but in Edt-4 tolerances given.D) The ultrasonic inspection for scanning shall generate a permanent record for inspection & standardization mentioned in Edt-4 , but in Edt-3 permanent record not mentioned.13) VISUAL CONNECTION INSPECTION A) In scope (3.11.1) Hard facing requirements apply to tool joints ,drill collars & HWDP center upsets included in Edt-4B) Inspection Apparatus : A calibrated light meter to verify illumination & angle gauges added in Edt-4C) Profile gages & angle gages calibration frequency 3 years mentioned in Edt-4.D) Box Taper & Shoulder Squareness : inspection added in Edt-4 . But in Edt-3 its is not covered.E) Pitting in pin ID inspection added in Edt-4 . Pin ID pitting visually estimated 1/8 shall cause for rejection.F) Shoulder flatness inspection included in Edt-4. In Edt-3 it was covered in Dimensional 2 & 3 inspections.G) New connections (Vam , NKDSTJ , Hilong ) procedures added in Edt-4. 14) DIMENSIONAL -2 INSPECTIONA) Profile gage calibration ( Every 3 years) included in Edt-4.B) Box seal width deleted in Edt-4 ,Where as in Edt-3 (3.13.4.h) it was covered & minimum values given.C) Shoulder flatness : it was covered in Edt-3 , where as in Edt-4 it was shifted to visual connection.D) New connections ( VAM , NKDSTH , HILONG ) procedures & acceptance criteria added in Edt-4.

15) DIMENSIONAL 3 INSPECTIONA) Profile gage calibration ( Every 3 years) included in Edt-4.B) Pin length (3.14.4.i) in Edt-3 mentioned for drill collars , where as in Edt-4 it was included to HWDP (Tab-3.9.1).C) Shoulder flatness : it was covered in Edt-3 , where as in Edt-4 it was shifted to visual connection.D) In HDWP Center Upset : eccentric rejection (height difference 1/8 and above ) mentioned in Edt-3 , but in Edt-4 rejection criteria including Edt-3 with height of center upset is less than 1/8 also.In Edt-3 center pad OD values covered in table-3.9.1 , but in Edt-4 center pad OD values not given.E) Vam connections procedure included in Edt-4.

16) BLACK LIGHT CONNECTION INSPECTIONA) SCOPE (3.15.1) : In Edt-4 only connections black light covered , but in Edt-3 connections black light and also heat checking on box tool joints using black light technique or the dry magnetic particle technique covered.But in Edt-4 heat checking (3.8) separate procedure given. B) Black light source rate 100 watts mentioned in Edt-3(3.15.2.b) , but in Edt-4 it is not mentioned.C) In Edt-4 the intensity of ambient visible light measured at the inspection surface during wet fluorescent magnetic particle inspection shall not exceed 2 ft-candles required . But in Edt-3 is not mentioned.

17) UT CONNECTION INSPECTION Sensitivity reference standard (Para 3.16.4.C) : In Edt-3 box connection or tube with a minimum wall thickness of given , but in Edt-4 only box connection given.

18) LIQUID PENETRANT INSPECTIONA) A calibrated light meter is required to verify illumination is added in Edt-4B) Intensity light source is required for visible technique (50 Ft-Candles) is added in Edt-4C) In Edt-3 magnifying mirror required for examination of box threads & pin ID , but in Edt-4 only inspection mirror mentioned.D) In Edt-4 the intensity of ambient visible light measured at the inspection surface during fluorescent penetrant inspection shall not exceed 2 ft-candles required . But in Edt-3 is not mentioned.

19) STABILIZER INSPECTIONA) APPARATUS : calibrated light meter & calibrated internal micro meter ( calibration frequency-6months) added in Edt-4B) 3.24.4 NOTES ( special purpose stabilizers like near bit stabilizers do not require bore back box when the box connection directly connects to the bit or the stabilizer require inside dia that do not accommodate a bore box .When this occurs , specific stabilizer manufacturer shall apply) added in Edt-4. C) In Edt-4 near bit stabilizers bit bevel diameters values mentioned in 3.25.6.d (Subs Procedure).D) Fish neck length & tong length values changed in Edt-4. CONNECTION ODMIN FISH NECK LENGTHMIN TONG SPACEOD 3 1273 < OD 8157OD > 8187E) RING GAGE BLADE INSPECTION : Ring gage dimensions ( min thickness & min width ) is added in Edt-4.Gage ID tolerance values also changed +0.005,-0.000.(In Edt-3 +0.000,-1/32) 20) SUBS INSPECTIONA) Calibrated light meter is added in apparatus (Edt-4)B) Corner radius inspection is covered in Edt-3 , but in Edt-4 it is not covered.C) Type B subs min neck length is 18 in Edt-3 , but in Edt-4 min neck length values changed (3.24.6.c). ( Stabilizer neck length values applied).D) For float bore values separate table (3.10) given in Edt-4

21) INSPECTION PERSONNEL QUALIFICATION In 3.28.5.c Recertification 3 years intervals with same employer given in Edt-3 , where as in Edt-4 5 years given.

22) SHOP INSPECTION OF FISHING TOOLS In Edt-4 fishing tools that consists of single piece no component pieces (Except weld section) like wash pipe , junk mills etc covered in VOL-3 . Fishing tools that are two or more components or sub-tools like over shots , spear pack-off etc are covered in VOL-4.

23) SHOP REPAIR & GAGING OF RSCIn Edt-3 API spec 7 mentioned , where as in Edt-4 API 7-2 given Inspection & gaging of refaced connections procedure included in Edt-4 (3.33.6)

24) DEMAGNETIZATIONA) New procedure added in Edt-4. Residual field should not exceed 3 Gs any where in the piece .Residual field up to 10 Gs my be acceptable after an agreement between the vendor and the customer.

25) POST INSPECTION MARKINGS OF DRILL STEM COMPONENTS A) New procedure added in Edt-4.B) Pipe classification bands distance changed to 18 in Edt-4 , where as in Edt-3 it is 36.

26) TABLESA) Table 3.5.3 criteria for used pup joints added in Edt-4B) In tables 3.6.1 & 3.6.2 nominal wall & U.T field reference standards columns added in Edt-4.C) In table 3.7.1 minimum seal values removed & minimum bevel dia values added in Edt-4 & Few of values changed like 5 FH , 6 5/8 FH Cbore maximum limits & minimum tong space values changed in Edt-4.D) In table 3.8 also some values changed (For Ex: 6 5/8 Reg Max CBore in Edt-4 is 6 1/8 ,where as in Edt-3 it is 6 3/32). Some of bevel diameter values also changed.E) In table 3.9.1 maximum pin length column included & center pad OD column deleted Edt-4.