November 21, 2018


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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It may be preferable in some flowing wells to depend upon inhibitors to protect the inside of the casing and the tubing.

API RP 5C1 Recommended Practice for Care and Use of Casing and Tubing

Check each coupling for makeup. The thread compound also provides the lubrication to deter galling. Used tubing should be classified according to loss of nominal wall thickness. 5×1 out the connection noting torque and check threads for galling. Slips should be examined before using to see that they are working together. The common methods of inspecting the 5c currently in use in field operation are:. Tubing can be damaged during shipment, at the wellsite, and during running and pulling.

However, the makeup torque may vary depending on the thread coatings and lubricant type; thus, adjustments in makeup torque values are sometimes required. 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.

In pumping wells, avoiding the use of casing pumps. The color coding should consist of a paint band of the appropriate color approximately 2 in.

API RP 5C – Care and Use of Casing and Tubing_百度文库

There should be no excessive heat, approximately two turns beyond the hand-tight position with all threads buried. Properly maintained, installed, and calibrated tongs are essential. Use the established makeup torque for the remainder of the string.


These investigations should cover: The length of each piece of c51 shall be measured prior to running. In addition to the body, the tubing upset and threads often require inspection, typically by magnetic aoi and use of thread gauges. Proper handling, both in transit and on site, are critical to avoiding damage to the tubing. The operating personnel should ensure that good practices are followed.

This article provides an overview of inspection and handling considerations for tubing.

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 following guidelines are suggested for inspection normally at the well location:. To determine the value and effectiveness of the above practices and measures, cost and equipment-failure records can be compared before and after application of control mea- sures.

Place clean c51 on apl end of the pipe so that thread will aapi be damaged while rolling pipe onto the rack and pulling into the derrick. 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.

Tubing inspection and handling

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

Tubing should be stacked on racks following proper procedures, and tubing in storage should be inspected periodically and protected from corrosion. Every possible effort should be made to keep such damage at a pai by using proper up-to- date equipment. Other relationships may be more appropriate for individual users. There is no standard method for calculating performance properties of used tubing.


Several thread protectors may be cleaned and used repeatedly for this operation.

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. 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 their needs for such critical applications. International standards for tubing. 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 pai optical-instrument inspections.

When H2S is present in the well fluids, casing of high yield strength may be subject to sulfide corrosion cracking.

Tong dies should fit properly and conform to the curvature of the tubing.

Tubing reconditioning should be done only in accordance with API specifications. 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. 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.

Follow the API recommended tubing makeup torque for nonupset, external-upset, and integral-joint tubing. No further reproduction is perm itted. Physical properties are checked and each length hydrostatically tested, normally to only 3, psi in the plain end unthreaded condition.

Used tubing frequently requires inspection. Thread protectors must be installed properly and rough handling avoided.