CN-117027724-B - Electric control radial opening and closing underground safety valve

CN117027724BCN 117027724 BCN117027724 BCN 117027724BCN-117027724-B

Abstract

The invention discloses an electric control radial opening and closing underground safety valve, which comprises an upper joint, a central tube, a hollow shaft motor, a rotary sleeve, a spiral sleeve, a connecting cylinder, a valve plate sealing piece mounting substrate, a lower joint, a return spring, a sealing cover, a valve shell, a valve plate opening and closing control disc, a valve plate sealing piece I, a valve plate sealing piece II, a rotary disc and a fixed block. The invention realizes radial opening and closing of the underground safety valve under the electric control drive, solves the problem that the valve plate is damaged and deformed due to uneven stress of the valve plate caused by the impact of underground high-pressure high-speed fluid, realizes automatic closing of the underground safety valve under the condition of motor failure, solves the problem that the existing electric control type underground safety valve does not have a failure protection mechanism, realizes synchronous response of opening and closing of the underground safety valve and a driving device, and solves the problem of slow response speed of the opening and closing process of the existing underground safety valve. The invention has the characteristics of better adaptability, faster response speed and higher operation safety.

Inventors

WANG GUORONG
GAO XIANG
WU JIE
LI ZELIANG
ZHAO PENG
ZHU SHUDI
TANG YANG
ZHOU MINGHAI
XIAO XIAO
ZHANG YULIN
YUAN GUANGJIE
YUAN GUOHAI
WANG JINZHONG

Assignees

西南石油大学

Dates

Publication Date: 20260505
Application Date: 20230811

Claims (5)

1. An electric control radial opening and closing underground safety valve is characterized by comprising an upper joint (1), a central tube (2), a hollow shaft motor (3), a rotary sleeve (4), a spiral sleeve (5), a connecting cylinder (6), a valve plate sealing piece mounting substrate (7), a lower joint (8), a return spring (9), a sealing cover (10), a valve shell (11), a valve plate opening and closing control disc (12), a valve plate sealing piece I (13), a valve plate sealing piece II (14), a rotary disc (15) and a fixed block (16), wherein the central tube (2) is provided with two cylindrical bosses I (201), External screw thread (202), rotary sleeve (4) are equipped with straight flute (401), and lower extreme circumference equipartition is equipped with through-hole I (402), spiral sleeve (5) are equipped with spout (501), the spiral angle of rise of spout (501) is greater than equivalent friction angle, rotary disk (15) are equipped with internal screw thread (1502), and upper end circumference equipartition is equipped with transmission recess (1501), valve plate opening and closing control dish (12) are equipped with seal groove IV (1204), and upper end circumference equipartition is equipped with transmission lug (1201), and the middle-end equipartition is equipped with angle spacing groove (1202), and the lower extreme equipartition is equipped with cylinder boss II (1203), valve plate sealing piece I (13) are equipped with seal groove V (1301), remove boss I (1302), sealed protruding I (1303), remove groove I (1304) and keep off and flow protruding (1305), valve plate sealing piece II (14) are equipped with seal groove VI (1401), remove boss II (1402), sealed protruding II (1403) and remove groove II (1404), valve plate sealing piece mounting substrate (7) are equipped with seal groove III (705), and upper end circumference equipartition is equipped with valve plate sealing piece guide way (701), The upper joint (1) is connected with the connecting cylinder (6) through threads, the hollow shaft motor (3) is arranged in the upper joint (1), the rotating sleeve (4) is connected with the hollow shaft motor (3) through bolts, the spiral sleeve (5) is arranged outside the rotating sleeve (4), the central tube (2) is arranged in the rotating sleeve (4), the cylindrical boss I (201) penetrates through the straight groove (401) and is matched with the sliding groove (501) so as to drive the cylindrical boss I (201) to move along the sliding groove (501) when the rotating sleeve (4) rotates, thereby enabling the central tube (2) to perform compound movement of rotation and axial displacement, the internal threads (1502) on the rotating disc (15) are connected with the external threads (202) on the central tube (2), the transmission lug (1201) is arranged in the transmission groove (1501) on the rotating disc (15), the angle limiting groove (1202) is used for installing the control disc (12) and further limiting the sealing disc (12) to be installed between the sealing disc (13) and the sealing disc (13) which are alternately installed, the cylinder boss II (1203) is installed in the removal groove I (1304) of valve plate sealing piece I (13) and the removal groove II (1404) of valve plate sealing piece II (14), remove boss I (1302) and remove boss II (1402) and install in valve plate sealing piece guide way (701), seal protruding I (1303) are installed in seal groove VI (1401), seal protruding II (1403) are installed in seal groove V (1301), fixed block (16) are connected with screw hole III (704) on stem (702), are connected valve plate opening and closing control disc (12) and valve plate sealing piece mounting substrate (7), valve housing (11) are installed in connecting cylinder (6), reset spring (9) are installed outside valve housing (11), lower clutch (8) are connected with connecting cylinder (6) through the screw thread.
2. The electronic control radial opening and closing underground safety valve according to claim 1, wherein the upper joint (1) is provided with a motor mounting groove (101), a sealing groove I (102) and a cable connecting channel (103), and the motor mounting groove (101) is used for mounting a hollow shaft motor (3).
3. An electrically controlled radial on-off downhole safety valve according to claim 1, wherein the central tube (2) is provided with an upper tube wall (203) and a lower tube wall (204), the upper tube wall (203) being thicker than the lower tube wall (204).
4. The electronic control radial opening and closing underground safety valve according to claim 1, wherein the connecting cylinder (6) is provided with a sealing piece mounting groove (601), a step I (602), a step II (603), a sealing groove II (604) and a rectangular groove (605), the sealing cover (10) is embedded and mounted in the sealing piece mounting groove (601), and the valve housing (11) is mounted between the step I (602) and the step II (603).
5. The electronic control radial opening and closing underground safety valve according to claim 1, wherein the lower end of the valve shell (11) is provided with a circumferential projection (1101), the middle end of the valve shell is provided with through holes II (1102) uniformly distributed in the circumferential direction, the circumferential projection (1101) is arranged in the rectangular groove (605), and the valve plate sealing piece mounting substrate (7) is connected with the valve shell (11) through screws.

Description

Electric control radial opening and closing underground safety valve Technical Field The invention relates to the fields of petroleum and natural gas engineering and gas storage, in particular to an electric control radial opening and closing underground safety valve. Background The subsurface safety valve is a key device widely applied to oil and gas exploitation and gas storage operation. The main function of the underground safety valve is to monitor and control the pressure of underground oil gas flow at the wellhead, and when abnormal conditions occur, such as wellhead pressure exceeding a normal range, underground equipment failure and the like, the underground safety valve can be rapidly closed to stop wellhead yield, ensure wellhead safety and prevent abnormal conditions. The existing underground safety valves are classified from control modes, and mainly comprise a hydraulic control type and an electric control type. Through investigation, the existing downhole safety valve still has a plurality of problems in use, mainly as follows: (1) The traditional underground safety valve adopts hydraulic drive, but the hydraulic drive has a series of problems of high cost, difficult maintenance, limited running depth and the like, and the traditional electric control safety valve has the problems of huge volume, high energy consumption and the like due to the fact that a large number of mechanical and electronic components are required. (2) The existing underground safety valve is opened and closed by the descending and ascending driving valve plates of the central tube, and the central tube cannot return under the pushing of the reset spring when the motor is invalid due to the fact that the central tube is driven by the motor to drive the ball screw to descend and ascend, so that the problem that the existing underground safety valve does not have a failure protection mechanism exists. (3) When the existing underground safety valve is closed, the valve plate can be damaged and deformed due to the impact of underground high-pressure high-speed fluid, so that the function of high-pressure blocking of the underground safety valve is lost. (4) The existing underground safety valve is opened and closed by driving the valve plate through the central pipe, but the central pipe needs a certain time for descending and ascending, so that the opening and closing response speed of the underground safety valve is slower, and accidents such as well kick, blowout and the like are caused in millisecond time when disasters occur. (5) The central tube of the existing underground safety valve has the defects of large diameter, large gravity and the like, and vibration and impact load can be caused when the central tube retreats in the closing process of the underground safety valve, so that the abrasion and damage of components in the valve are accelerated, the service life of the safety valve is shortened, and the maintenance and replacement frequency and cost are increased. In summary, it is highly desirable to provide an electronically controlled radial opening and closing downhole safety valve, so as to solve the above problems existing in the use process of the existing hydraulically controlled and electronically controlled downhole safety valve, and thus effectively improve the adaptability, responsiveness and safety of the downhole safety valve. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides an electric control radial opening and closing underground safety valve. The invention adopts the hollow shaft motor, realizes the pure electric control of the underground safety valve, solves a series of problems of high cost, difficult maintenance, limited in depth of insertion and the like of the existing hydraulic control type underground safety valve, and solves the problems of huge volume, high energy consumption and the like of the existing electric control type underground safety valve due to the fact that a large number of mechanical and electronic components are required; according to the invention, the central tube is driven to slide on the sliding groove of the spiral sleeve by adopting the rotary sleeve, so that the central tube is pushed out in a rotating way, and the central tube can reversely rotate and retract under the indirect pushing of the reset spring under the condition of motor failure, thereby realizing the automatic closing of the underground safety valve under the condition of motor failure and solving the problem that the existing electric control type underground safety valve does not have a failure protection mechanism; the invention adopts the rotary disk, and the rotary disk is arranged on the central pipe and axially connected with the valve plate opening and closing control disk, so that the motor power can be immediately transmitted to the valve plate opening and closing control disk through the rotary disk on the central pipe, the synchronous res