Hydraulic Oil Pipe Self-Sealing Device

Product Introduction

The hydraulic oil pipe self-sealing device developed by our company is a semi-sealing well sealing device with hydraulic control, rapid opening and closing, and closed annulus. It is suitable for use in recoil sand construction operations and daily oil pipe lifting operations. It can also be used in In the case of a buffer accumulator, forced tripping is performed through the chamfered tubing coupling. This self-sealing device not only solves the problem of overflow or intermittent blowout, but also solves the problems of complex equipment and high wellhead.

Structure and Working Principle

The structure of the self-sealing device is mainly composed of an upper shell, a lower shell, a hydraulic annular rubber core, a sealing ring, etc.

This device uses the principle that rubber deforms under pressure and returns to its original shape after pressure relief to achieve the sealing and opening of the annulus.

When it is necessary to seal the well, start the hydraulic oil pump, close the oil return gate, and open the high-pressure oil inlet gate. The high-pressure hydraulic oil enters through the oil inlet hole of the shell and promotes the deformation of the annular rubber core, gradually tightening the oil pipe and other pipe strings to achieve sealing. The purpose of the annulus.

When it is necessary to lift the pipe string and open the closed annulus, close the high-pressure oil inlet gate and open the oil return gate. The high-pressure hydraulic oil enters the high-pressure oil pipeline from the oil inlet hole of the shell and flows back to the hydraulic oil tank. The hydraulic annular rubber The core will return to its original shape, loosen the grip on the tubing string such as the oil pipe, and the annulus will open, allowing the string to be lifted and lowered without any obstacles.

Main Feature

① It is suitable for sand washing operations and oil pipe string lifting operations at oil field operations.

② By adjusting the appropriate pressure on the rubber core, static sealing and dynamic sealing of the lower pipe string can be achieved.

③ It can realize on-board remote hydraulic control system control, with stable operating pressure and uniform oil supply.

④ It is easy to install, operate and replace the rubber core and has a long service life.

The Main Technical Parameter: