Find the most up-to-date version of API RP 5C1 at Engineering API RP 5C1 specifies color-coding to indicate thickness. The color coding should consist of a paint band of the appropriate color approximately. TORQUE TABLE REVIEW 8 RD THREAD CASING Group Discussions Options: Reinstate Min. & Max. Torque Values with References to section Remove.

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With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed.

Tubing inspection and handling

Where external casing corrosion is known to occur or stray electrical current surveys indicate that relatively high currents are entering the well, the following practices can be employed: Corrosion on the outside of casing can be caused by corrosive? If other values are chosen, the minimum torque should be not less than 75 percent of the value selected.

In arriving at the proper tension and landing procedure, consideration should be given to all factors, such as well temperature and pressure, temperature developed due to cement hydration, mud temperature, and changes of temperature during producing operations. Torque values higher than those listed above may be considered under certain conditions, providing box swelling does not occur.

Place spacing strips at right angles to pipe and directly above the lower strips and supports to prevent bending of pipe.

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

Cracking may require aids, such as magnetic powder, for detection. The base of the triangle will aid in locating the thread vanish point for basic power-tight zpi however, the position of the coupling with respect to the base of the triangle shall not be a basis for acceptance or rejection of the product.

The damage is generally in the form of pitting, box wear, stress-corrosion cracking, and sul? On round-thread gp, this position is to the plane of the vanish point on the pipe; on buttress-thread casing, this position is to the base of the triangle stamp on the pipe; and on extreme line casing, this position is to the shoulder on the externally threaded end. Also on repeated makeup, 5v1 threads make up more each time and interference occurs.


There is no standard method for calculating performance properties of used tubing. Do not jump tubing out of the coupling.

Field-end threads and the mating coupling threads should have thread compound applied just before stabbing. Internal casing- caliper surveys indicate the extent, location, and severity of corrosion.

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

Those found damaged, even slightly, should be laid aside unless satisfactory means are available for correcting thread damage. In view of this practice, it is suggested that the individual user: Use of power tongs is necessary to obtain consistent makeup torque.

This condition may penalize joint strength, leak resistance, and in severe cases, lead to abutment of pin ends near the center of the coupling in the made-up connection. This document was produced under API standardization procedures that ensure appropri- ate notification and participation in the developmental process and is designated as an API standard.

The length of the backup line should be such as to cause minimum bending stresses on the casing and to allow full stroke movement of the makeup tong. Protection criteria for casing differ somewhat from the criteria used for line pipe.

Tighten any loose couplings after thoroughly cleaning the threads and applying fresh compound over entire thread surfaces, and before pulling the pipe into the derrick. Tap lightly near the middle and completely around the coupling, never near the end nor on 51 sides only. Power tubing tongs are dp for high-pressure or condensate wells to ensure uniform makeup and tight joints.


This publication will no longer be in effect five years after its publication date as an operative API standard or, where an extension has been granted, upon republication. Since corrosion may result from many causes and in? Compounds other than Rpp modi? API is not undertaking to meet the duties of employers, manufacturers, or suppliers to warn and properly train and equip their employees, and others exposed, concerning health and safety risks and precautions, nor undertaking their obligations under local, state, or federal laws.

Stab vertically, preferably with the assistance of a man on the stabbing board. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent. API standards are published to facilitate the broad availability of proven, sound engineering and operating practices. Call toll-free oror fax to discover more. Particular attention should r given to mitigation of corrosion where the probable life of subsurface equipment is less than the time expected to deplete a well.

When lengths of casing are inadvertently dragged in the dirt, the threads should be recleaned and serviced again as outlined in 4. The function of the second pass is to temper or anneal the underlying weld and adjacent metal. If a mixed string is to be run, check to 51 that appropriate casing will be accessible on the pipe rack when required r; to program. Inhibitor effectiveness can also be checked by means of coupons, caliper surveys, and visual examinations of readily accessible pieces of equipment.

This purpose is defeated if the second pass extends onto the casing.