Anti-slide single-rubber-barrel downhole throttling device

Abstract

The invention discloses an anti-slide single-rubber-barrel downhole throttling device which is designed for achieving the purposes of improving sealing performance of a throttling device, prolonging the service life of the throttling device, stabilizing the throttling device and preventing the throttling device from sliding. The anti-slide single-rubber-barrel downhole throttling device mainly comprises a locking sleeve connecting a putting device and a body, a fishing head arranged on the body in a sleeved mode, a slips, a slips supporting sleeve, a down seal plunger barrel arranged under the locking sleeve, a slips supporting sleeve arranged on a middle supporting sleeve in a sleeved mode, a rubber barrel supporting sleeve, a rubber barrel, a cylinder sleeve, an air cock arranged at the bottom end of the down seal plunger barrel, an air cock base arranged at the bottom end of the base seal plunger barrel, a sand preventing hood connecting the cylinder sleeve and an outer supporting sleeve, anti-slide claws connected with a connection sleeve, and the like. When the anti-slide single-rubber-barrel downhole throttling device is mounted, the device is easy to seal in a down seal mode, after mounting, the rubber barrel and an oil pipe are good in sealing performance, service life is stable, in fishing, a fishing pin is sheared, the body and the slips supporting sleeve move upwards and are separated from the rubber barrel, and the rubber barrel can effectively contract, so that fishing is easy. The anti-slide claws can well prevent the device from sliding, and the device is prevented from sliding down into a well bottom. The anti-slide single-rubber-barrel downhole throttling device is good in sealing performance and stable in service life.

Description

technical field [0001] The invention relates to an anti-sliding single rubber barrel downhole throttling device, which belongs to the technical field of oilfield gas recovery. Background technique [0002] The downhole throttling technology relies on the downhole throttling device to achieve wellbore throttling and pressure reduction, and uses ground temperature heating to restore the gas flow temperature at the wellhead after throttling to the temperature before throttling, so as to solve many technical problems in the wellbore and the ground during the gas well production process. . [0003] In the Sulige Gas Field, the application of downhole throttling technology has evolved from preventing the formation of natural gas hydrates to reducing the pressure of the wellhead and surface gathering and transportation systems, optimizing the surface process, and becoming a key technology for the development of the Sulige Gas Field. [0004] The high-pressure production period of ...

AI Technical Summary

Problems solved by technology

[0005] The choke currently used is prone to permanent deformation due to the long service time, so that it cannot be effectively retracted during the fishing process. Moreover, when the wellbore fluid is above the choke, in order to conduct the oil casing pressure, it is often The phenomenon that the choke device fell to the bottom of the well made it impossible for the gas well to carry out the subsequent gas recovery process test

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