TAILIEUCHUNG - IADC Drilling Manual Part 3

Tham khảo tài liệu 'iadc drilling manual part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter B Drill String 1. Before unloading make sure that the thread protectors are tightly in place. Use slings to load pipe. See Figure B3-45. Figure B3-45 Use of Slings to Load Drill Pipe Figure B3-45. Use proper handling procedures when loading drill pipe utilizing hooks slings etc. 2. Do not unload pipe by dropping. Avoid rough handling which might ding or dent the body of the pipe. Out-ofroundness will reduce collapse strength greatly. 3. When roiling down skids pull pipe parallel to the stack and do not allow pipe to gather momentum or to strike ends because even with protectors in place there is danger of damaging the threads. 4. Stop each length before it reaches preceding length then push together by hand. XI. Storage The following precautions are recommended for pipe storage A. Do not pile pipe directly on ground rails steel or concrete floors. The first tier of pipe should be no less than 12 inches from the ground to keep moisture and dirt away from pipe. B. Pipe should rest on supports properly spaced to prevent bending of the pipe or damage to the threads. The stringers should lie in the same plane and be reasonably level and should be supported by piers adequate to carry the full stack without settling. C. Provide wooden strips as separators between successive layers of pipe so that no weight rests on the tool joint. Use at least three spacing strips. D. Place spacing strips at right angles to pipe and directly above the lower strips and supports to prevent bending of the pipe. International Association of Drilling Contractors B-95 IADC Drilling Manual - Eleventh Edition E. Stagger adjoining lengths of pipe in the tiers an amount approximately the length of the tool joint or collars. F. Block pipe by nailing 1 by 2 by 2 wooden blocks at both ends of the spacing strips. Plastic chocks are now available which will do a better job of blocking. G. When pipe is to be stored the bore should be washed out with clean fresh water and the bore coated with oil

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