API RP 7G-2003 pdf download.Recommended Practice for Drill Stem Design and Operating Limits.
14 Special Processes 14.1 DRILL STEM SPECIAL PROCESSES 14.1.1 Usually the materials used in the manufacture of down hole drilling equipment (tool joints, drill collars, stabilizers and subs) are AISI–4135, 4137, 4140, or 4145 steels. 14.1.2 These are alloy steels and are normally in the heat treated state, these materials are not weldable unless proper proce- dures are used to prevent cracking and to recondition the sections where welding has been performed. 14.1.3 It should be emphasized that areas welded can only be reconditioned and cannot be restored to their original state free of metallurgical change unless a complete heat treatment is performed after welding, which cannot be done in the field. 14.2 CONNECTION BREAK-IN Based on field experience, it has been observed that used rotary shouldered connections are less likely to gall than new connec- tions. It is believed that this is due to work hardening the connection surfaces. The process of Connection Break-In is a make-up and break-out of the connection under controlled conditions in order to provide surface work hardening prior to use. Connection Break-In may be done on the rig, as an optional manufacturing step, or at a service facility. Since many factors effect connection galling, Connection Break-In does not eliminate the possibility of galling. 14.2.1 Preparation for Connection Break-In Remove any storage or rust preventative coatings. Make sure that the connections are free of dirt or other debris. Thoroughly coat the threads and shoulders of both pin and box connections with a thread compound suitable for rotary shouldered connec- tions. Determine the recommended make-up torque of the connection. Make note of the friction factor of the thread compound and any adjustment required to the applied make up torque. See API Specification 7, Appendix G and API Recommended Practice 7A1 for further information on thread compounds and friction factor. 14.2.2 Connection Break-In at the Rig Taking care to align the connection, stab and make1. Page 2, Section 3.36: Replace the word ÒseatingÓ with ÒsealingÓ. 2. Pages 11 and 12, Table 8: Replace with attached Table 8. Note: Three values in column 10 have changed and most of the values in Column 12 have changed. All changes are marked by a vertical bar. 3. Pages 13 and 14, Table 9: Replace with attached Table 9. Note: Most of the values in Column 12 have changed. All changes are marked by a vertical bar. 4. Page 16, Table 10, Column 13: For 4 1 / 2 in., 16.60 lb/ft, IEU X-95 drill pipe with a 4 1 / 2 H-90 tool joint connection, the Make-up Torque for Class 2 (Column 13) should read Ò13,013Ó. 5. Page 17, Table 10, Column 6: For 4 1 / 2 in., 20.00 lb/ft, EU-S135 drill pipe with an NC50 tool joint connection, the New ID (Column 6) should read Ò3Ó. 6. Page 17, Table 10, Column 7: For 5 1 / 2 in., 21.90 lb/ft IEU S-135 drill pipe with a 5 1 / 2 FH tool joint connection, the Make-up Torque (Column 7) should read Ò52,302Ó. 7. Page 17, Table 10, Note 6: Replace Òp =Ó with ÒP =Ó. 8. Page 19, Table 12: Remove ” (inch designations) from entire table. Replace ÒV-0.038 radÓ with ÒV-0.038RÓ throughout table. 9. Pages 20Ð32, Figures 1 through 25: The units for Torsional yield strength and Recom- mended Make-up Torque should read Òft-lbÓ. 10. Pages 35Ð38, Table 14: Replace with attached Table 14. Note: The drill collar bore sizes in the heading have been corrected. Any other change to the table is marked with a vertical bar. 11. Page 49, Table 17, headings for Columns (8), (9), and (10): Replace Òft/lbÓ with Òft-lbÓ. 12. Page 53, Section 8.1: Remove Ò(see 11.2)Ó. 13. Page 54, Equation 20: Replace Ò2000Ó with Ò20,000Ó. 14. Page 59, Section 9.2, Þrst sentence: Replace Òfactor bÓ with Ò9.1.2Ó. 15 Page 93, Figure 73b, Heading: Replace Ò10.47Ó with Ò10.4Ó. 16. Page 98, Section 11.6, Equation legend: For variable x , replace ÒD.1Ó with Ò0.1Ó. 17. Page 101, Section 11.6.2: Replace Ò18,850Ó with Ò18,840Ó. 18. Page 101, Section 12.1: Section should be attributed to reference Ò26