SU1357547A1 - Cutoff valve for gas well - Google Patents

Abstract

The invention relates to oil and gas equipment and m. B. used in the gas industry to prevent and eliminate accidents. The purpose of the invention is to increase reliability by simplifying control. The valve includes a housing (K) 1 with a saddle 2, a shut-off element 3, its control unit, including a piston 4 with an axial channel for the passage of gas. The piston 4 is installed in K 1 with the possibility of axial movement and interacts with the organ 3 and forms an annular chamber 5 with K 1. The latter is hydraulically connected to the channel for iipo-gas flow. The organ 3 has a reload assembly, including a spring-loaded rod (W) 6 with an axial channel. Installed in K 1 and interleaves along its axis Ш 6, which forms with K 1 an annular cavity 7 for accommodating a power agent controlling the displacement 111 6. The reloading unit is designed as a telescopically mounted inside piston 4 and Ш 6 with the possibility of axial displacement and interaction with them a protective sleeve 9 with radial channels. The latter forms, with K 1, the piston 4 and Ш 6, the annular space AND associated with the open position of the organ 3 with the gas passage channel. Body control unit 3 (L with SP SP 4 "V)

Description

made in the form installed with a gap of 12 in 1 K 1 of a glass of 13, which houses the check valve. The body 3 closes the axial channel and stops the access of gas to the wellhead. The gap 12 in the invention of oil and gas equipment, in particular to intra-equipment, and can be used in the gas industry for the prevention and elimination of emergency situations.

The aim of the invention is to improve the reliability of the valve by simplifying control.

The drawing shows the valve-shutoff gas wells, a General view.

The shut-off valve includes a housing 1 with a saddle 2 and a shut-off body 3 in a form that does not have a valve. In the lower part of the housing 1, there is a control unit for the locking member, which includes a piston 4 with an axial channel for the passage of gas, which is installed in the root with the possibility of axial displacement and interaction with the locking member 3 and forms with the housing an annular chamber 5 connected hydraulically to the channel for the passage of gas. In the upper part of the body there is a reloading unit of the locking member, including a spring-loaded rod 6 with an axial channel, mounted in the body with the possibility of axial movement and forming an annular cavity 7 with the body to accommodate a power agent controlling the shaft 6 through the pulse tube 8. the piston 4 and the stem 6; 1; the copy sleeve 9 is mounted with the possibility of axial movement and interaction with the piston and LHTOKOM with radial channels 10 forming the housing 1, the piston 4 and the stem 6; 11, which in the open position of the closure member 3 is hydraulically connected to the axial channel for the passage of gas. Above the saddle 2 in the body of the shut-off valve is installed with a gap of 12 cup 13, in which is placed the check valve 14.

To open the valve body 3, a pump or an: a compressor is connected to the pulse tube 8 and the pressure of the power agent is created, which, acting through the pulse tube 8 and the annular cavity 7 on the spring-loaded rod 6, moves the protective sleeve 9 and the piston 4 to the lowest position, In this case, the gas is found to instantly release gas from chamber 5 into the axial channel. Sleeve 9 serves to protect the chamber from the well fluid when the valve is lowered into the plugged well. 1 il.

which is in the axial channel, through the holes 15 and 16, the gap between the cup and the body 1 and the check valve 14 fills the annular chamber 5.

Thereafter, the pressure in the annular cavity 7 is released to return the spring-loaded rod to the extreme upper position.

The gap 12 between the cup 13 and the housing 1 ensures that the pressure in the annular chamber 5 is equalized with respect to the gas pressure in the axial channel in the mode of automatic tracking of changes in the mode of operation of the well.

With a different decrease in pressure (due to an emergency), a pressure drop occurs between the annular chamber 5 and the annular space 11 in the axial channel and annular space 11, under the influence of which the piston 4 with the protective sleeve 9 moves upward, freeing the spring-loaded The rotary body 3, which sits on the saddle 2 and closes the axial channel, stopping the access of gas to the wellhead.

The gap 12 between the cup 13 and the housing 1 in this case serves as throttles, preventing the instantaneous release of gas from the annular chamber 5 into the axial channel.

Protective sleeve 9 serves to protect

the annular chamber 5 from the borehole fluid during the descent of the valve-shut-off valve into the dead well.

Claims (1)

Invention Formula A gas well cut-off valve, comprising a housing with a saddle, a locking member, a locking member control unit, including a piston with an axial m channel for the passage of gas, mounted in the housing with axial movement and interaction with the locking member and forming an annular chamber with the housing, hydraulically connected to the channel for the passage of gas, and the reloading unit of the closure member, including a spring-loaded swab with an axial channel, mounted in the housing with the possibility of axial 31357547 displacement and forming with the case a col and stem of the protective sleeve with a radial cavity for accommodating by force-bearing channels forming with the body an agent controlling the stem, which differs by force and dust, with the aim of increasing the cadech tied in the open position of the valve shut-off by simplifying the organ with the gas passage channel, control, the reloading unit is made, and the control unit of the shut-off member is telescopically mounted inside as installed with a gap in cor- porschn and the rod with the possibility osevogopuse cup, which accommodates the reciprocal movement and interaction with porshnemny valve.