Cable injection and recovery system

Abstract

The invention discloses a cable injection and recovery system, comprising a cable drum and a coiled tubing drum, wherein the cable drum is provided with a cable, and the coiled tubing drum is wound with a coiled tubing. The cable injection and recovery system is characterized in that an injection device is arranged between the cable drum and the coiled tubing drum, an injection cavity is arranged in the injection device and is provided with a cable leading-out port communicated to the outside, a cable injection port and a fluid inlet, the cable leading-out port is provided with a connector, and the abutting end of the coiled tubing is communicated to the injection cavity through the connector. According to the cable injection and recovery system, the cable can be injected and recovered without releasing the coiled tubing from the coiled tubing drum to be flattened, and in addition, a pressure consumption pipe and an overflowing pipe are arranged in the injection device, so that the friction resistance between a sealing ring in a sealing pipe and the surface of the cable is greatly reduced, accordingly, the feed-in and the pull-out of the cable can be realized through smaller feed-in force and smaller pull-out force, the structure is simple, and the operation is convenient and fast.

Description

technical field [0001] The invention relates to the field of oil drilling and production equipment, in particular to a cable injection recovery system in which a coiled tubing can be injected into a cable without flattening. Background technique [0002] With the continuous development of coiled tubing related technologies, coiled tubing and related equipment have been increasingly used in drilling and logging of horizontal wells and directional wells. Since coiled tubing is a continuous section of thin-walled circular tube, compared with conventional Rod, in the process of operation, does not need to be connected with joints, and constitutes a continuous channel connecting ground equipment and downhole tools. Therefore, through the penetration of cables in coiled tubing to build downhole power and signal channels, the electrical drilling and logging work is more efficient than in Electric drilling and logging under conventional drill pipe has higher feasibility and better a...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to pass the cable into the coiled tubing, the following two methods are often used to inject the cable from the cable drum into the coiled tubing, or to retract the cable from the coiled tubing on the drum to the cable drum : One is to fully release the coiled tubing from the reel, extend it into a well drilled vertical well, and then use gravity to insert the cable into the coiled tubing; the other is to flatten the coiled tubing on the ground to form a very For long straight pipes, the cable is inserted into the continuous pipe by using the crawling mechanism or the principle of the hydraulic cylinder piston rod. The disadvantage of the above two methods is that the continuous pipe must be released from the reel to form a straight After the tube, use the crawling mechanism or piston-like mechanism to inject the cable, and the cable cannot be injected directly into the continuous tube wound on the reel. It is precisely because of this limitation that the actual operation is very inconvenient and requires a lot of manpower and material resources. , and also affects the life of coiled tubing

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