Bi-directional limiting expanding locking type continuous oil pipe combined connector

Abstract

A bi-directional limiting expanding locking type continuous oil pipe combined connector comprises a continuous oil pipe. An expanding sleeve with the positioning effect is arranged at one end of the continuous oil pipe, and a lower expanding sleeve is mounted at the other end of the continuous oil pipe. The expanding sleeve and the lower expanding sleeve are symmetrically arranged, conical sleeves are symmetrically arranged on the outer sides of the expanding sleeve and the lower expanding sleeve, and the lower expanding sleeve is connected with a lower connector body through a connecting pipe body. An upper expanding sleeve in an upper connector body of the combined connector is positioned on the proper position of the continuous oil pipe through set screws firstly, secondly the conical sleeves are mounted in the continuous oil pipe, the lower expanding sleeve is mounted in the continuous oil pipe along the continuous oil pipe, finally the lower connector body is connected with the lower expanding sleeve through the connecting pipe body, matched down-hole tools are connected to the lower connector body, and mounting actions are completed; and when the tools are dismounted, through a special tonger, the connecting pipe body is rotated to dismount the lower connector body, and finally the lower connector body is rotated to achieve the separation action of the lower connector body and the down-hole tools. The bi-directional limiting expanding locking type continuous oil pipe combined connector has the characteristics that connecting is reliable, and falling-off and tensile failure are not prone to occurring.

Description

technical field [0001] The invention relates to the technical field of joints between coiled tubing and downhole tool strings in the petroleum industry, in particular to a two-way limit expansion and locking coiled tubing combination joint. Background technique [0002] Coiled tubing operation equipment is widely used in drilling, completion, logging, workover and other operations in oil and gas fields, so it is called "universal operation equipment". Various construction operations of coiled tubing are inseparable from the matching downhole tools. Therefore, to a certain extent, the development level of downhole tools for coiled tubing restricts the development and application of coiled tubing. Coiled tubing joints are mainly used to reliably connect coiled tubing with matching downhole tools, and the reliable operation of coiled tubing joints is a key factor for the success of coiled tubing construction. Therefore, it is an urgent need for coiled tubing construction to d...

AI Technical Summary

Problems solved by technology

Three types of connectors are mostly used in the construction of coiled tubing, and different structural types of connectors are selected according to different job requirements. These connectors can withstand certain tension and torque, but the tensile strength of the three structural types Neither the capacity nor the torsion resistance can meet the needs of coiled tubing drilling construction.

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