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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Tubing inspection and handling –
A properly designed cathodic protection system simi- lar to that used for line pipe, which can alleviate external casing corrosion. In view of 5c practice, it is suggested that the individual user: Properly maintained, installed, and calibrated tongs are essential.
Various nondestructive inspection services have been employed by users to ensure that the desired quality of tubing is being run. Tubing should be handled at all times on racks or on wooden or metal surfaces free spi rocks, sand, or dirt other than normal drilling mud. If needed, adjust torque and repeat.
API RP 5C – Care and Use of Casing and Tubing_百度文库
There are several types of tubing inspection methods that may be beneficial. When H2S is present in the well fluids, casing of high yield strength may be subject to sulfide corrosion cracking. Enviado por Wagner flag Denunciar. Tubing can be damaged during shipment, at the wellsite, and during running and pulling.
Used tubing should be classified according to loss of nominal wall thickness. However, the makeup torque may vary depending on the thread coatings and lubricant type; thus, adjustments in makeup torque values are sometimes required. Check spider slips to ensure they will not damage the tubing body. It may be preferable in some flowing wells to depend upon inhibitors to protect the inside of the casing and the tubing.
In pumping wells, avoiding the use of casing pumps.
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. The following are also checked:.
API RP 5C1 Recommended Practice for Care and Use of Casing and Tubing
The length of each piece of tubing shall be measured prior to running. The total of the individual lengths so measured will represent the unloaded length of the tubing string. The color coding should consist of a paint band of the appropriate color approximately 2 in.
The common methods of inspecting the tubing currently in use in field operation are:. Numerous factors must be considered when running and pulling tubing. Carefully inspect the threads.
The authorized user is perm itted to print one single copy for personal reference use only. Thread protectors must be installed properly and rough handling avoided. 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. API-modified thread compound generally has been accepted for a wide range of service conditions over many years.
Tong dies should fit properly and conform to the curvature of the tubing. 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. Use of power tongs is necessary to obtain consistent makeup torque. The thread compound also provides the lubrication to deter galling.
Slips should be examined before using to see that they are working together. Loose couplings should be removed, the thread thoroughly cleaned, fresh compound applied. Physical properties are checked and each length hydrostatically tested, normally to only 3, psi in the plain end unthreaded condition.
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.
Where conditions favorable to corrosion exist, a qualified corrosion engineer should be con- sulted. Literature on sulfide corrosion or persons competent in this a;i should be consulted.