String Book - Logan Oil Tools
String Book - Logan Oil Tools
String Book - Logan Oil Tools
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6<br />
recommenDeD proceDUre for maKing Up<br />
DriLL coLLarS With neW jointS<br />
Connector Sub or Drill Collar<br />
Suggested Marking<br />
1. Thoroughly clean with distillate, pin and box threads and shoulder. After cleaning, the joint must<br />
be dried before lubricant is applied.<br />
2. Coat all areas of the pin and box threads and shoulders with a thin even coat of a good grade<br />
lubricant from a covered or newly opened can. A molydisulfide lubricant is recommended.<br />
3. Extreme care should be used when stabbing the joints to avoid stabbing wounds. If drill collar<br />
connecting subs are used, it is preferred that the subs be applied by hand rather than with lifting<br />
equipment.<br />
4. Make up joints manually with chain tongs as far as possible and then use cathead to the full<br />
recommended torque as shown on attached chart.<br />
5. Scribe vertical chalk line across joint make-up line of box and pin faces.<br />
6. Break joint, clean and dry threads. Inspect the threads and joint faces carefully for evidence<br />
of galling or “hair like” slivers of steel. Stone or file all rough spots and remove slivers. Be careful<br />
not to remove chalk line across joint face.<br />
7. Again make up joints manually with chain tongs as far as possible and then with cathead using<br />
full recommended torque. The joint must make up to the chalk mark or father. If the joint does not<br />
make up to this line, again break the joint, dry and clean. Inspect the threads and joint faces care-<br />
fully and in general proceed as under 6 above.<br />
8. If the joints make up to the chalk line or farther, a center punch mark shall be made on both the<br />
box and pin halves, adjacent to the shoulder, as permanent inspection mark. After each run, these<br />
match making spots should be inspected and as long as there is no creep between the two marks,<br />
the joints should be left unbroken if possible (nonworking joints). As the drill collars wear, it is<br />
recommended that the center punch marks be deepened so that they will always be in evidence.<br />
When it is noted that creep has occurred on the nonworking joints, they should be broken apart,<br />
inspected and if necessary recut.
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