Release device and release method for oil field underground putting tool

Abstract

The invention discloses a release device for an oil field underground putting tool. The releasing device comprises a releasing short circuit and a driving mechanism, and the releasing short circuit is connected with an underground tool to be put; the underground tool to be put is provided with a fishing head, and the fishing head is inserted into the releasing short circuit; a sliding supporting frame and a ball are arranged in the releasing short circuit; two annular grooves are formed in the inner wall of the releasing short circuit, and radial through holes are formed in the two ends of the sliding supporting frame respectively. According to the release device and release method for the oil field underground putting tool, the problems that the fishing head of an existing releasing device is prone to slipping off from a lock hook, a special tool needs to be used for connecting the underground tool to be put, and a sealing piece of a cable blowout preventer is prone to being damaged are solved. The release device for the oil field underground putting tool is suitable for the underground tool to be put with an outer fishing head and comprises an underground testing tool, a hanger of testing instruments such as an underground temperature and pressure gauge, an underground sampler, a bottom-hole regulator ,a bridge plug tool, a safety valve, a blanking plug, a sliding sleeve, a throttle valve and a manifold oil nozzle. The underground testing tool is used for steel wire operation; the bottom-hole regulator is used for oil extraction production; the bridge plug tool is used for pumping perforation connection; the safety valve, the blanking plug and the sliding sleeve are used for multi-layer fracturing of an immovable string; and testing tools such as the throttle valve, the manifold oil nozzle and the like are matched with a ground metering device for use.

Description

technical field [0001] The invention relates to the field of oilfield downhole operation equipment, in particular to a release device and a release method for an oilfield downhole delivery tool. Background technique [0002] In the process of oilfield development, whether it is drilling, oil test production, logging, oil production or workover operations, all the work carried out in the downhole must be widely used in downhole tools. There are many kinds of downhole tools, some of which are downhole tools that need to stay at a predetermined depth in the well for a period of time or permanently. The anchoring mechanism is stuck on the oil in the well, the casing wall or the well wall to achieve fixation and at the same time realize the disengagement of the delivery tool from the downhole tool. The disengagement of the delivery tool from the downhole tool is performed by the release device of the delivery tool, which is generally activated by mechanical or electric or hydrau...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a release device and a release method for an oil field downhole delivery tool to solve the problem that the existing release device and the fishing head are not securely connected when they are hooked through the hook, and the fishing head is easy to slip from the hook. The operation process is cumbersome when connecting the fishing head, and the hook of the existing release device protrudes from the outer wall of the release device after it is released. When encountering the blowout preventer, it is easy to catch or damage the seal of the blowout preventer.

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