Anti-scouring packer

Abstract

An anti-scouring packer comprises an unpacking joint, an unpacking ring, a connecting joint, a stopping ring, an upper taper 5, a slip, a leaf spring, a slip cover, a lower taper, an upper pressing cap, a setting pin, a piston, an upper limit ring, a lower limit ring, a locking block, a spindle, a pressure transmitting inner sleeve, a pressure transmitting sleeve, a locking ring, a rubber cylinder protecting cover, a sliding joint, a rubber cylinder and a lower joint, wherein the spindle is mounted and connected between the interior of the unpacking joint and the interior of the lower joint; the unpacking ring, the connecting joint, the upper taper, the slip, the slip cover, the lower taper, the upper pressing cap, the piston, a hydraulic sleeve, the pressure transmitting inner sleeve, the pressure transmitting sleeve, the rubber cylinder protecting cover, the sliding joint and the rubber cylinder are sequentially mounted on and connected with the outer side of the spindle. The anti-scouring packer has the characteristics that eccentric wear damage is not prone to occur when normal-circulation mud displacement or reverse-circulation large-displacement backwashing is performed in a straight well, an inclined well or a horizontal well, and when the rubber cylinder passes through an inclined well section, setting cannot appear in advance during scraping on the well wall; a single hydraulic cylinder structure is adopted, the anti-scouring capacity is high, the service life of the rubber cylinder is long, and the like, therefore, the packer is widely applied to downhole operation processes for oil exploitation.

Description

technical field [0001] The invention belongs to downhole packers for oil development, in particular to an anti-scouring packer. Background technique [0002] Publication number CN201250641Y, a Chinese patent authorized on September 3, 2009, discloses a "horizontal downhole flushing packer" whose structure is a leather bowl structure. The packer with this structure has played a role in oil exploitation, but it also has the following shortcomings or deficiencies: ①Because the cup seal is not heat-resistant, it is not suitable for thermal recovery of horizontal wells; ②There is no anchoring device, during the production process The movement of the sand control string is easy to occur; ③ During the running of the horizontal well sand control string, for the quicksand oil layer, sand washing cannot completely wash away the remaining sand in the horizontal section, and the process of flushing and running must be adopted. It is relatively complex; ④ During the sand washing process...

AI Technical Summary

Problems solved by technology

The packer with this structure has played a role in oil exploitation, but it also has the following shortcomings or deficiencies: ①Because the cup seal is not heat-resistant, it is not suitable for thermal recovery of horizontal wells; ②There is no anchoring device, during the production process The movement of the sand control string is easy to occur; ③ During the running of the horizontal well sand control string, for the quicksand oil layer, sand washing cannot completely wash away the remaining sand in the horizontal section, and the process of flushing and running must be adopted. Relatively complicated; ④In the process of sand washing, it is very easy to set in the middle; ⑤The anti-scouring ability is poor, and it is easy to cause damage to the rubber cartridge and the packer to be set in advance when flushing with a large displacement.

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