1 May API RP 5C1 (R). Recommended Practice for Care and Use of Casing and Tubing. standard by American Petroleum Institute, 05/01/ 24 Sep API RP 5C – Care and Use of Casing and Tubing_自然科学_专业资料。 Recommended Practice for Care and Use of Casing and Tubing. 29 Jun API tubing is inspected at the mill in accordance with API Spec. 5CT. . Torque values listed in API RP 5C1 apply to tubing with zinc-plated or.
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In general, all new areas should be considered as being potentially corrosive and investigations should be initiated early in the life of a field, and repeated periodically, to detect and localize corrosion before it has done destructive damage. The authorized user is perm itted to print one single copy for personal reference use only.
Those found damaged, even slightly, should be laid aside unless satisfactory means are available for correcting thread damage.
When H2S is present in the well fluids, casing of high yield strength may be subject to sulfide corrosion cracking. Tubing reconditioning should be done only in accordance with API specifications.
For transportation, slightly different procedures are needed to prevent damage depending on whether shipped by water, rail, or truck. Tubing should be handled at all times on racks or on wooden or metal surfaces free of rocks, sand, or dirt other than normal drilling mud. Literature on sulfide corrosion or persons competent in this field should be consulted.
The use of pipe wrenches is not recommended. There should be no excessive heat, approximately two turns beyond the hand-tight position with all threads buried.
Despite all the American Petroleum Institute API specifications and testing, some tubing defects are still found after delivery; thus, some operators do further inspection of new tubing on critical wells.
The actual length under tension in the hole can be obtained by consulting graphs that are prepared for this purpose and are available in most pipe handbooks. Tubing can be damaged during shipment, at the wellsite, and during running and pulling.
When lengths of tubing are inadvertently dragged in the dirt, the threads should be recleaned and ser- viced again as outlined in 5. Check each coupling for makeup.
Tong dies should fit properly and conform to the curvature of the tubing.
Tubing inspection and handling
Loose couplings should be removed, the thread thoroughly cleaned, fresh compound applied. Use of power tongs is necessary to obtain consistent makeup torque. To establish the correct torque for API tubing threads, make up the first few joints to the recommended values and examine the connection.
In flowing wells, packing the annulus with fresh water or low-salinity alkaline muds. Ordinarily, pumping wells should be tubed as close to bot- tom as practical, regardless of the position of the pump, to minimize the damage to the casing from corrosive fluids. Several thread protectors may be cleaned and used repeatedly for this operation.
The placement of thread compound at the root of the rounded API threads with the bearing pressure on the thread flanks the interference fit, power tight makeup apk the 5×1 mechanism.
If needed, adjust torque and repeat. Check apj slips to ensure they will not damage the tubing body.
This article provides an overview of inspection and handling considerations for tubing. For specialty connections, consult with the manufacturer on the proper thread compound. The thread compound also provides the lubrication to deter galling.
API RP 5C1 Archives – Production Technology
International standards for tubing. For additional appi or licensing options, contact Techstreet, Inc. No further reproduction is perm itted. Properly maintained, installed, and calibrated tongs are essential. If the stand-off is abnor- mally great, check the coupling for tightness. It may be preferable in some flowing wells to depend upon inhibitors to protect the inside of the casing and the tubing.
The color 5c11 should consist of a paint band of the appropriate color approximately 2 in. The common methods of inspecting the tubing currently in use in field operation are:.