High pressure oil and gas well hydraulic oil pipe anchoring device and work method thereof

Abstract

The invention relates to a high pressure oil and gas well hydraulic oil pipe anchoring device and a work method thereof. The high pressure oil and gas well hydraulic oil pipe anchoring device comprises a central pipe. The outer side of the central pipe is provided with an upper connector, a cylinder barrel, a spring seat, an upper cone, slips, a lower cone and a lower connector which are sequentially connected. A piston is arranged between the central pipe and the cylinder barrel. A compression spring is arranged between the piston and the spring seat. The slips are connected with a reset spring. A slip sleeve is arranged outside the slips. The piston is connected with the central pipe through a first shearing pin. The slip sleeve is connected with the upper cone through a second shearingpin. Compared with an existing anchoring tool, the high pressure oil and gas well hydraulic oil pipe anchoring device has the characteristics of being simple in structure, low in sealing part quantity, high in anchoring force, low in cost, reliable in anchoring and easy in anchoring release.

Description

technical field [0001] The invention relates to the field of oil testing and well completion engineering, and more specifically relates to a hydraulic tubing anchoring device for a high-pressure oil and gas well and a working method thereof. Background technique [0002] Reservoir stimulation is one of the most effective steps to improve the development of oil and gas fields. During the process of reservoir stimulation, due to the increase of wellhead pressure and the pumping of low-temperature fluid into the wellbore, the deformation of the production test string will affect the stable sealing of the packer. , leading to construction failure. At present, the anchoring device is mainly used to suppress the pressure inside the oil pipe. The slips of the anchoring device protrude outward under the action of the liquid pressure, and clamp the inner wall of the casing to realize the anchoring action, which plays the role of anchoring the pipe string and reduces the sealing capac...

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Problems solved by technology

[0002] Reservoir stimulation is one of the most effective steps to improve the development of oil and gas fields. During the process of reservoir stimulation, due to the increase of wellhead pressure and the pumping of low-temperature fluid into the wellbore, the deformation of the production test string will affect the stable sealing of the packer. , leading to construction failure

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