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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Used tubing frequently requires inspection. 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.
Tubing can be damaged during shipment, at the wellsite, and during running and pulling. The color coding should consist of a paint band of the appropriate color approximately 2 in.
Tubing inspection and handling
If needed, adjust torque and repeat. Adequate thread cleaning is spi for proper connection makeup and pressure-tight strings. Typical defects are outside and inside pits and longitudinal cuts, transverse laps, and mechanical wear and erosion. In addition to the body, the tubing upset and threads often require inspection, typically by magnetic powder and 55c1 of thread gauges.
The authorized user is perm itted to print one single copy for personal reference use only. Due to the xpi tolerance on the outside diameter immediately behind the tubing upset, the user is cau- ali that difficulties may occur when wrap-around seal-type hangers are installed on tubing manufactured on the high side of the tolerance; therefore, it is recommended that the user select the joint of tubing to be installed at the top of the string.
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. When lacking previous experience with any of the above measures, they should be used cautiously and on a limited scale until appraised for the particular operating conditions.
Those found damaged, even slightly, should be laid aside unless satisfactory means are available for correcting thread damage.
Several thread protectors may be cleaned and used repeatedly for this operation. Slip and tong marks are injurious. The tubing should be handled with thread protectors, which are not removed, until the tubing is ready to stab. Particular attention should be given to mitigation of corrosion where the probable life of subsurface equipment is less than the time expected to deplete a well.
An analysis of the pro- duced gas for carbon dioxide and hydrogen sulfide is also desirable; 2 corrosion rate tests by using coupons of the same materials as in the well; and 3 the use of caliper or optical-instrument inspections. 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. Carefully inspect the threads.
API RP 5C1 Recommended Practice for Care and Use of Casing and Tubing
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 5v1 the sealing mechanism. The operating personnel should ensure that good practices are followed. The compound is a mixture of metallic and graphite powders uniformly dispersed in a grease base.
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. To determine the value spi effectiveness of the above practices and measures, cost and equipment-failure records can be compared before and after application of control mea- sures.
Tubing inspection and handling –
It may be preferable in some flowing wells to depend upon inhibitors to protect the inside of the casing and the tubing. In general, the high-strength materials are more susceptible to handling damage. Enviado por Wagner flag Denunciar. The thread compound also provides the lubrication to deter galling. To establish the correct torque for API tubing threads, make up qpi first few joints to the recommended values and examine the connection.
For additional copies or licensing options, contact Techstreet, Inc. The following are also checked:. Use this section to list papers in OnePetro that a reader who wants to learn more should definitely read.
If the qpi is abnor- mally great, check the coupling for tightness. Place clean protectors on field end of the pipe so that thread will not be damaged while rolling pipe onto the rack and pulling into the derrick.
Follow the API recommended tubing makeup torque for nonupset, external-upset, and integral-joint tubing. Protection criteria for casing differ somewhat from the criteria used for line pipe.
There is no standard method for calculating performance properties of used tubing. The following guidelines are suggested for inspection normally at the well location:.
Literature on external casing corrosion or persons competent in this field should be consulted for proper protection criteria. Apply 5×1 good thread compound but avoid excessive amounts.
Care must be taken in unloading and storage. The concentration of H2S necessary to cause cracking in dif- ferent strength materials is not yet well defined. Use this section to provide links to relevant material on websites other than PetroWiki and OnePetro. 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.
There are several types of tubing inspection methods that may be beneficial.