API RP 5C1 PDF
1 May API RP 5C1 (R). Recommended Practice for Care and Use of Casing and Tubing. standard by American Petroleum Institute, 05/01/ 26 Jul API/PETRO RP 5C1-ENGL Recommended Practice for Care and Use of Casing and Tubing. Upstream Segment. 10 Oct GB Tubulars has developed this Recommended Practice for Casing on API RP 5C1 – “Recommended Practice for Care and Use of Casing.
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Where conditions favorable to corrosion exist, a qualified corrosion engineer should be con- sulted. Literature on sulfide corrosion or persons competent in this field should be consulted. API-modified thread compound generally has been accepted for a wide range of service conditions over many years.
Check each coupling for makeup. Use this section to list papers in OnePetro that a reader who wants to learn more should definitely read. To establish the correct torque for API tubing threads, make up the first few joints to the recommended values and examine the connection. Inspection of tubing when received and following use are important to ensure that defects or wear do not prevent the tubing from performing as designed.
API RP 5C1 Recommended Practice for Care and Use of Casing and Tubing
In pumping wells, avoiding the use of casing pumps. Several thread protectors may be cleaned and used repeatedly for this operation. Follow the API recommended tubing makeup torque for nonupset, external-upset, and integral-joint tubing.
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. Use this section to provide links to relevant material on websites other than PetroWiki and OnePetro. Where internal corrosion is known to exist, the following practices can be employed: Class IV connections are intended for the most severe application, and Class I connections are intended for the least severe application.
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 use of pipe wrenches is not recommended. Care must be taken in unloading and storage. The color coding should consist of a paint band of the appropriate color approximately 2 in.
However, the makeup torque may vary depending on the thread coatings and lubricant type; thus, adjustments in makeup torque values are sometimes required. In 5v1, 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.
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.
Using inhibitors to protect the inside of the casing against corrosion. A properly designed cathodic protection system simi- lar to that used for line pipe, which can alleviate external casing corrosion. For transportation, slightly different procedures are needed to prevent damage depending on whether shipped by water, rail, or truck.
This article provides an overview of inspection and handling considerations for tubing. Apply a good thread compound but avoid excessive amounts.
Tubing inspection and handling
Immediately before running, remove protectors from both field end and coupling end and clean threads thoroughly, repeating as additional rows become uncovered. Use the established makeup torque for the remainder of the string.
Protection criteria for casing differ somewhat from the criteria used for line pipe. 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 produces the sealing mechanism.
Tong dies should fit properly and conform to the curvature of the tubing. It may be preferable in some flowing wells to depend upon inhibitors to protect the inside of the casing and the tubing. Used tubing frequently requires inspection. Numerous factors must be considered when running and pulling tubing. Loose couplings should be removed, the thread thoroughly cleaned, fresh compound applied.
Download API RP 5C1 – pdf
Tubing should be handled at apj times on racks or on wooden or metal surfaces free of rocks, sand, or dirt other than normal drilling spi. Tubing should be stacked on racks following proper procedures, and tubing in storage should be inspected periodically and protected from corrosion. There are several types of tubing inspection methods that may be beneficial. 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.
When lengths of tubing are inadvertently dragged in the dirt, the threads should be recleaned and ser- viced again as outlined in 5. In flowing pai, packing the annulus with fresh water or low-salinity alkaline muds. In view of this practice, it is suggested that the individual user: The mea- surement should be made from the outermost face of the coupling or box to the position on the externally threaded end where the coupling or the box stops when the joint is made up power tight.
There should be no excessive heat, approximately two turns beyond the hand-tight position rrp all threads buried. The concentration of H2S necessary to cause cracking in dif- ferent strength materials is not yet well defined. Due to the permissible tolerance on aoi outside diameter immediately behind the tubing upset, the user is cau- tioned that difficulties may occur when wrap-around seal-type hangers are installed on tubing manufactured on the gp 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.
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Collar-type tubing elevators are adequate for API nonbeveled couplings; however, slip-type elevators are recommended when running tubing with beveled couplings, special clearance couplings, and integral joint tubing. Some users have found that, for a limited number of critical well wpi, these procedures do not result in tubing suffi- ciently free of defects to meet their needs for such critical applications.
There is no standard method for calculating performance properties of used tubing.