Self-locking type oil and gas well open hole section packing well completion device

Abstract

The invention relates to a self-locking type oil and gas well open hole section packing well completion device which comprises an upper connector, a mandrel and a lower connector; the upper connector and the mandrel are connected through threads; the mandrel is sleeved with a piston; the outer side of the piston is sleeved with an upper piston outer cylinder; the upper piston outer cylinder and the upper connector are connected through threads; a locking ring is arranged on the outer side of the piston; a locking ring outer cylinder is arranged on the outer side of the locking ring; the locking ring outer cylinder is connected with the piston outer cylinder through threads; the locking ring outer cylinder is connected with a lower piston outer cylinder through threads; the lower portion of the lower piston outer cylinder is connected with a rubber cylinder through threads; the lower portion of the rubber cylinder is connected with a sealing sleeve through threads; the mandrel is sleeved with the sealing sleeve; the mandrel is in threaded connection with the lower connector; and a first shear pin and a second shear pin are arranged between the upper piston outer cylinder and the piston. According to the self-locking type oil and gas well open hole section packing well completion device, the open hole section of an oil and gas well can be effectively packed, the reservoir transformation efficiency is improved, and a powerful guarantee is provided for efficient exploration and development of ultra-deep oil and gas reservoirs.

Description

technical field [0001] The invention relates to the technical field of oil and gas wells, in particular to a self-locking oil and gas well open-hole section isolation completion device. Background technique [0002] In the deepening exploration and development of ultra-deep oil and gas reservoirs in the Tarim Basin, ultra-deep horizontal wells are an important means to improve single well productivity and realize efficient development of oil and gas reservoirs. If high yield cannot be obtained, it is often necessary to obtain the ideal yield through reservoir transformation. At present, the open hole completion of ultra-deep horizontal wells mainly adopts the domestically developed expansion open hole packer. Although it can effectively achieve the effect of segmental reconstruction of the open hole of horizontal wells, it has the disadvantage of continuous fluid inflow expansion and easy loss of seal after setting; reservoir stimulation Disadvantages such as failure of the...

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Problems solved by technology

[0002] In the deepening exploration and development of ultra-deep oil and gas reservoirs in the Tarim Basin, ultra-deep horizontal wells are an important means to increase single well productivity and realize efficient development of oil and gas reservoirs, but for heterogeneous and tight unconventional formations, most of them are drilled only by a single horizontal well. Unable to obtain high yield, it is often necessary to transform the reservoir to obtain the ideal yield

At present, the open hole completion of ultra-deep horizontal wells mainly adopts the domestically developed expansion open hole packer. Although it can effectively achieve the effect of segmental reconstruction of the open hole of horizontal wells, it has the disadvantage of continuous fluid inflow expansion and easy loss of seal after setting; reservoir stimulation Disadvantages such as failure of the rubber cartridge after the string is depressurized

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