Tight coupling oil pipe for packer

Abstract

The invention relates to the technical field of oil exploitation equipment and discloses a tight coupling oil pipe for a packer. The tight coupling oil pipe for the packer comprises a coupling oil pipe I, wherein a threaded cutting sleeve is arranged on one side of the outer surface of the coupling oil pipe I; one side of the inner wall of the threaded cutting sleeve is in threaded connection withthe outer surface of the coupling oil pipe I; an annular cutting sleeve is fixedly arranged in the middle of the inner wall of the threaded cutting sleeve; one side of the annular cutting sleeve is contacted with one end of the coupling oil pipe I; the other side of the inner wall of the threaded cutting sleeve is in threaded connection with a coupling oil pipe II. Compared with the existing oilpipe connection technology, the tight coupling oil pipe for the packer has the advantages that the firmness and sealing property of the coupling oil pipe I and the coupling oil pipe II during connection are effectively increased, and leakage does not occur in the oil and gas transportation process. Meanwhile, since the threaded cutting sleeve and threads on the coupling oil pipe I and the couplingoil pipe II are always tightly meshed together, a phenomenon that the oil pipes are released is avoided, and the stability and reliability of the coupling oil pipe are effectively improved.

Description

technical field [0001] The invention relates to the technical field of oil exploitation equipment, in particular to a packer sealing connection oil pipe. Background technique [0002] Connecting tubing mainly refers to the pipeline that transports crude oil or natural gas from the oil and gas layer to the surface after drilling is completed. The length of tubing specified in API is divided into three types: R-1 is 4.88-7.62m, R-2 is 7.62m ~10.36m, R-3 is 10.36m or longer, but the depth of the oil well is tens of kilometers deep, so the ends of the connecting tubing are processed with threads, and then they are connected together with couplings to penetrate deep into the oil and gas layer. [0003] However, in the actual operation process, the threaded connection part of the tubing is its weak link. Under the action of high temperature, high pressure and high mechanical strength in the well, the sticking phenomenon of the threaded connection of the tubing is the most common ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a packer sealingly connected oil pipe, which has the advantages of high stability, good sealing performance, and safety and reliability during use, and solves the problem that the threaded connection part of the oil pipe is a weak link in the actual operation process , under the action of downhole high temperature, high pressure and high mechanical strength, the sticking phenomenon of the threaded connection of the tubing is one of the most common failure forms, which seriously affects the integrity of the tubing connection and the integrity of the seal, resulting in Leakage occurs in the process of oil and gas transportation, and in the case of severe sticking, the tubing may even trip off, which has brought serious consequences to oil and gas extraction operations. A problem that caused huge economic losses

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