A two-way slip sealing oil pipe coupling clamping device and its construction method

Abstract

The invention relates to a two-way slip sealing oil pipe collar clamping device and a construction method thereof, which relate to the technical field of oil and natural gas exploitation. The locking device provided by the present invention mainly includes a collar locking device and a gas lift buffer positioner, and the coupling locking device includes a central tube a, a limit stop ring and a locking device claw. When the coupling retainer enters the well, the retainer claws move to both sides along the ring groove under the action of the jar, the limit stop ring prevents the retainer claws from continuing to move downward, and the retainer claws open, Clamp into the gap between the couplings to realize the positioning of the clamping device; the setting tool pushes the gas-lift buffer positioner until the cylinder sticks to the central pipe a, and due to the inertia, the parts in the cylinder press against it tightly To the inner wall of the gas well to complete the setting; the split type of the device solves the problem that the integral tool cannot pass through the wellhead, encounters resistance at the wellhead and hangs in advance, and cannot go down to a place with a large well inclination, and can be stably locked. The device of the invention has simple structure and reliable method.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas exploitation, in particular to a two-way slip sealing oil pipe collar clamping device and a construction method thereof. Background technique [0002] When the shale gas well production enters the middle and late stages, due to the reduction of formation pressure and production reduction, the gas well may be flooded, causing the gas well to stop production. Therefore, the plunger drainage process is required. When using the plunger process, it is necessary to lower The plunger retainer or work cylinder ensures that the plunger operates within an effective range, and plays the role of drainage and gas recovery. [0003] At present, the integral one-way locking device is usually used in the field. Because the integral tool is too long, it is easy to cause the tool to fail to pass through the entrance, to be blocked at the wellhead in advance, and to be unable to go down to a place with a...

AI Technical Summary

Problems solved by technology

[0003] At present, the integral one-way locking device is usually used in the field. Because the integral tool is too long, it is easy to cause the tool to fail to pass through the entrance, to be blocked at the wellhead in advance, and to be unable to go down to a place with a large well inclination. The tool will cause vibration when the gas and liquid pass through, which will easily cause the tool to fail, rise to the wellhead or descend to the bottom of the well, and block the production channel

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