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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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There is no standard method for calculating performance properties of used tubing.

Tubing inspection and handling –

These investigations should cover: International standards for tubing. Use of power tongs is necessary to obtain consistent makeup torque. The total of the individual lengths so measured will represent the unloaded length of the tubing string.

Class IV connections are intended for the most severe application, and Class I connections are intended for the least severe application. In addition to the body, the tubing upset and threads often require inspection, typically by magnetic powder and use of thread gauges. Where internal corrosion is known to exist, the following practices can aoi employed: There are several types of tubing inspection methods that may be beneficial.

When lengths of tubing are inadvertently dragged 5c the dirt, the threads should be recleaned and ser- viced again aapi outlined in 5. Numerous factors must be considered when running and pulling tubing. Tubing should be stacked on racks following proper procedures, and tubing in storage should be inspected periodically and protected from corrosion.

Check spider slips to ensure they will not damage the tubing body.

Other relationships may be more appropriate for individual users. Various nondestructive inspection services have been employed by users to ensure that the desired quality of tubing is being run.

Some users have found that, for a limited number of critical well applications, these procedures do not result in tubing suffi- ciently free of defects to meet a;i needs for such critical applications. The color coding should consist of a paint band of the appropriate color approximately 2 in. Use this section to list papers in OnePetro that a reader who wants to learn more should definitely read.


Properly maintained, installed, and calibrated tongs are essential. A;i steel tape calibrated in decimal feet millimeters to the nearest 0. Back out the connection noting torque and check threads for galling. Several thread protectors may be cleaned and used repeatedly for this operation. In view of this practice, it is suggested that the individual user: Tubing can be damaged during shipment, at the wellsite, and during running and pulling.

Adequate thread cleaning is essential for proper connection makeup and pressure-tight strings. Use the established makeup torque for the remainder of the string. Thread protectors must be installed properly and rough handling avoided.

Physical properties are checked and each length hydrostatically tested, normally to only 3, psi in the plain end unthreaded condition. Inhibitor effectiveness may be checked also by means of caliper surveys, visual examinations of readily accessible pieces of equipment, and water analyses for iron content.

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.

In general, the high-strength materials are more susceptible to handling damage. Evaluation procedures for casing and tubing connections tests to aapi performed to determine the galling tendency, sealing performance, and structural integrity of tubular connections, especially for high-pressure application are under study.

Protection criteria for casing differ somewhat from the criteria used for line pipe. Use this section to provide links to relevant 5f1 on websites other than PetroWiki and OnePetro. Used tubing should be classified according to loss of nominal wall thickness.

The placement of thread compound at the root of the qpi API threads with the bearing pressure on the thread flanks the interference fit, power tight makeup produces the sealing mechanism. Coupons may also be helpful in determining whether suffi- cient inhibitor is being used. If needed, adjust torque and repeat.


Follow the API recommended tubing makeup torque for nonupset, external-upset, and integral-joint tubing.

In flowing 51, packing the annulus with fresh water or low-salinity alkaline muds. To establish the correct torque for API tubing threads, make up the first few joints to the recommended values and examine the connection.

Enviado por Wagner flag Denunciar. If the stand-off is abnor- mally great, check the coupling for tightness.

Tubing inspection and handling

The tubing should be handled with thread protectors, which are not removed, until the tubing is ready to stab. Using inhibitors to protect the 5c of the casing against corrosion. Immediately before running, remove protectors from both field end and coupling end and clean threads thoroughly, repeating as zpi rows become uncovered. 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 apj, sand, or dirt other than normal drilling mud. Every possible effort should be made to keep such damage at a minimum by using proper up-to- date equipment.

In pumping wells, avoiding the use of casing pumps.

This article provides an overview of inspection and handling considerations for tubing. Due to the permissible tolerance on the outside diameter immediately behind the tubing upset, the user is cau- tioned that difficulties may occur when 5c11 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.