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In the use of TPCO production of API 5CT N80, downhole operation should be performed according to the API RP 5C1 API 5CT N80, do the preparatory work before the use and inspection, prepared with thread compound API BUL 5A2 requirements and with torque control system of the tongs. The specific operation requirements are as follows. Preparation and inspection well before the API 5CT N80
(1) the new delivery of the API 5CT N80 should be harmful defect check whether API SPEC5 CT stated, inspection methods and operating range and should be limited to the standard.
(2) all of the API 5CT N80, whether it's new, or used or repaired, the thread should always take care of silk. Any time, API 5CT N80 should be placed in the no stone, sand or mud (except the normal drilling mud) bench, board face or metal surface. If they put API 5CT N80 into the soil, should be re cleaning thread, and in accordance with article (6) requirements for processing before
And then.
(3) for the long API 5CT N80 column, recommend the use of slip elevator. Chuck and slip should be maintained in a clean, no damage, and with appropriate. The API 5CT N80 column, using long Kauwa, and chuck must remain horizontal.
(4) if you use the collar elevators, should carefully check the bearing surface is uneven wear, because can lead to increased wear the collar side, there is danger coupling prolapse; when the load on the bearing surface, the load should be evenly distributed.
(5) slip check chuck and the elevator, and make them down. Otherwise, may make the pipe pressure concave or spondylolisthesis.
(6) API 5CT N80 well, the thread of the preparatory work should take the following measures:
The API 5CT N80, API 5CT N80 should be unloaded end and coupling end protection wire, thoroughly clean threaded.
② carefully check thread. If the thread is damaged, even if it is slightly damage, should also be singled out, unless there is a measure of good repair thread. In particular, should check whether the deformation coupling, even slight deformation, should be removed without.
The API 5CT N80, API 5CT N80 should be measured per root length. Measurements should be used when the 10 hexadecimal metric scales, precision steel tape 1mm, from the coupling (or joint) the outer end surface measurement to the external thread connector end position, the position is immediately head coupling (or joint) to terminate the place. In API 5CT N80 round thread joint, this position is to flat pipe thread disappeared; in the buttress thread API 5CT N80, this position is to the triangle mark line. So, the total length of each API 5CT N80 measurements represent the natural length API 5CT N80 column (no load length).
④ should check whether each hoop tightening. If the close distance is very big, it should check whether the locking collar. To thoroughly clean threaded and the thread surface coated with the new thread fat, and before the pipe to the derrick, collar should be singled out and tighten all loose.
In tube to buckle, all internal and external threads, the surface shall be fully coated with thread compound. Recommend the use of API BUL 5A2 "thread compound bulletin" in the latest versions of improved high thread fat, but in exceptional circumstances under harsh conditions, recommend high-pressure silicone thread compound provisions for the use of API BUL 5A2.
We should be in API 5CT N80 end of the threaded parts wear clean thread protector, lest the tube in tube frame rolling and ascension to the thread damage on the derrick. The protection wire to clean operation process should, in order to use repeatedly.
(7) of each API 5CT N80 well, should be full path analysis, the path planning should be consistent with the latest edition of the API SPEC5CT API 5CT N80 "specification" requirements and tubing. Path test failed API 5CT N80 must not be used.
(8) of each API 5CT N80 should be careful to underground or scroll to go on stage, not throwing. To avoid any part of the API 5CT N80 collision derrick or other equipment, a buffer rope should be at the gate of the derrick.
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