CN211422591U

CN211422591U - Flow-adjustable underground flow control valve

Info

Publication number: CN211422591U
Application number: CN201921469728.3U
Authority: CN
Inventors: 江勇
Original assignee: Tianjin Dafanhua Petroleum Technology Co ltd
Current assignee: Tianjin Dafanhua Petroleum Technology Co ltd
Priority date: 2019-09-08
Filing date: 2019-09-08
Publication date: 2020-09-04
Anticipated expiration: 2029-09-08

Abstract

The utility model provides a flow-adjustable underground flow control valve, which comprises a main shaft, a pushing joint, an upper sealing part, a regulating ring, a middle sealing part, a pressure transmission shaft, a lower sealing part, a sliding sleeve, a reset sleeve, a locking block, a suspension sleeve, a bottom sealing part, a limit sleeve, a door opening and closing part, a float-releasing ring, a throttle valve sleeve, a lower main shaft and a lower joint from top to bottom in sequence; the suspension sleeve is abutted against the lower end of the main shaft, and the bottom of the suspension sleeve is hermetically abutted against the lower end of the suspension sleeve; the limiting sleeve is abutted against the lower end of the bottom seal; the main shaft, the hanging sleeve, the bottom seal and the limiting sleeve are connected through threads; the switch door and the float ring are arranged on the outer side wall of the limiting sleeve; the sliding sleeve can slide up and down along with the movement of the transmission shaft, the reset sleeve is used for resetting the sliding sleeve and the transmission shaft, and the locking block is arranged at the edge part of the reset sleeve and used for locking the reset sleeve.

Description

Flow-adjustable underground flow control valve

Technical Field

The utility model relates to an adjusting control valve, concretely relates to downhole flow control valve with adjustable flow.

Background

Currently in the oil drilling industry, bypass valves are used as one of the main components of downhole power tools, and mainly serve as an annular space for communicating a channel in a drill string with a wellbore. The bypass type mud-free drilling rig has two positions of bypass and closing, and is positioned at the bypass position in the drilling tripping operation process, so that mud in a drilling string circularly bypasses a non-working motor to enter an annular space, and thus the mud does not overflow a well platform in the drilling tripping process. When the mud flow and pressure reach the standard set values, the valve core moves downwards to close the bypass valve hole, and at the moment, the mud flows through the motor to convert the pressure energy into mechanical energy. When the mud flow value is too small or the pump is stopped, the generated pressure is not enough to overcome the spring force and the static friction force, the spring jacks up the valve core, and the bypass valve hole is in the opening position again. In the technologies of layered mining, layered fine water injection, horizontal well water control and plugging and the like, an underground flow control tool is one of key links, and the tool needs to have the function of realizing layered flow regulation according to the change of geological conditions, so that the optimized mining or injection is realized, the water injection effect is further improved, the advanced flooding is prevented, and the recovery ratio is improved. The realization principle of the underground flow control tool is that the opening and closing of the flow control water nozzle and the size adjustment of the flow section are realized by changing the relative position relation of cylindrical parts in the underground tool. However, the drilling fluid contains a large amount of impurities, so that the drilling fluid is easy to form accumulation at the spring, the service life of the spring is greatly shortened, and the valve core and the valve seat are easy to block. In the traditional bypass valve structure, the downward movement of the valve seat is blocked by a clamp spring arranged in an inner hole of the valve seat, and the clamp spring is stressed greatly and is easy to pop out of a clamp groove during working, so that the bypass valve is failed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a flow control valve in pit with adjustable flow, the utility model provides a following technical scheme: a flow-adjustable underground flow control valve sequentially comprises a main shaft, a pushing joint, an upper seal, a regulating ring, a middle seal, a pressure transmission shaft, a lower seal, a sliding sleeve, a reset sleeve, a locking block, a suspension sleeve, a bottom seal, a limiting sleeve, a switch door, a float-releasing ring, a throttle valve sleeve, a lower main shaft and a lower joint from top to bottom; the suspension sleeve is abutted against the lower end of the main shaft, and the bottom of the suspension sleeve is hermetically abutted against the lower end of the suspension sleeve; the limiting sleeve is abutted against the lower end of the bottom seal; the main shaft, the hanging sleeve, the bottom seal and the limiting sleeve are connected through threads; the switch door and the float ring are arranged on the outer side wall of the limiting sleeve; the sliding sleeve can slide up and down along with the movement of the transmission shaft, the reset sleeve is used for resetting the sliding sleeve and the transmission shaft, and the locking block is arranged at the edge part of the reset sleeve and used for locking the reset sleeve.

Furthermore, the throttle valve sleeve comprises a valve port, the throttle valve sleeve is movably arranged in the limiting sleeve, an opening is formed in the limiting sleeve, when the throttle valve sleeve moves downwards, the valve port of the throttle valve sleeve crosses the bottom for sealing, the opening is opened, and the valve port and the opening form a liquid circulation channel.

Further, a tubular spring is arranged on the inner side of the lower connector and used for elastically supporting the throttle valve sleeve, and a piston is arranged in a gap on the inner side of the main shaft and used for driving the throttle valve sleeve to move upwards.

Drawings

FIG. 1 is a cross-sectional view of an adjustable flow downhole flow control valve;

FIG. 2 is a schematic diagram of a flow adjustable downhole flow control valve;

reference numerals: the device comprises a main shaft 1, a pushing connector 2, an upper seal 3, a regulating ring 4, a middle seal 5, a pressure transmission shaft 6, a lower seal 7, a sliding sleeve 8, a reset sleeve 9, a locking block 10, a hanging sleeve 11, a bottom seal 12, a limiting sleeve 13, a switch door 14, a release drift ring 15, a throttle valve sleeve 16, a piston 17, a lower main shaft 18, a tubular spring 19, a lower connector 20, a closed pipeline interface 21 and an opened pipeline interface 22;

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

The utility model discloses a flow-adjustable underground flow control valve, which comprises a main shaft 1, a pushing joint 2, an upper seal 3, a regulating ring 4, a middle seal 5, a pressure transmission shaft 6, a lower seal 7, a sliding sleeve 8, a reset sleeve 9, a locking block 10, a hanging sleeve 11, a bottom seal 12, a limit sleeve 13, a switch door 14, a release drift ring 15, a throttle valve sleeve 16, a lower main shaft 18 and a lower joint 20 from top to bottom in sequence; the main shaft device also comprises a closed pipeline interface 21 and an opened pipeline interface 22 which are arranged at the left side and the right side of the top of the main shaft 1; the closing pipeline interface 21 and the opening pipeline interface 22 are fixed on the top of the main shaft 1 through a pressing cap and used for controlling the opening and closing of a flow control valve, and the pushing joint 2 is used for controlling the connection state of the closing pipeline interface 21 and the opening pipeline interface 22; the push joint 2, the upper seal 3, the regulating ring 4, the middle seal 5, the pressure transmission shaft 6, the lower seal 7, the sliding sleeve 8, the reset sleeve 9, the lock block 10 and the throttle valve sleeve 16 are all arranged on the inner side of the main shaft 1, the suspension sleeve 11 is abutted to the lower end of the main shaft 1, and the bottom seal 12 is abutted to the lower end of the suspension sleeve 11; the limiting sleeve 13 is abutted against the lower end of the bottom seal 12; the main shaft 1, the suspension sleeve 11, the bottom seal 12 and the limiting sleeve 13 are connected through threads; the switch door 14 and the float ring 15 are arranged on the outer side wall of the limit sleeve 13; the sliding sleeve 8 can slide up and down along with the movement of the transmission shaft 6, the reset sleeve 9 is used for resetting the sliding sleeve 8 and the transmission shaft 6, and the locking block 10 is arranged at the edge part of the reset sleeve 9 and used for locking the reset sleeve 9; the throttle valve sleeve 16 further comprises a valve port, the throttle valve sleeve 16 is movably disposed in the position-limiting sleeve 13, an opening is disposed on the position-limiting sleeve, when the throttle valve sleeve 16 moves downward, the valve port crosses the bottom seal 12, the opening is opened, the valve port and the opening form a liquid circulation channel, and the liquid becomes larger as the moving distance increases, and finally the liquid flows out from the throttle valve sleeve 16. Conversely, when the throttle sleeve 16 moves upward, the valve port gradually closes and decreases with increasing distance of movement, eventually closing and fluid no longer flows out of the throttle sleeve 16. It can be seen that the opening communicates with or closes off the valve port such that the opening cooperates with the incremental increase or decrease in flow when the valve port is opened or closed. The pressure transmission shaft 6 and the sliding sleeve 8 are filled through a lower seal 7, and the lower seal 7 is a 0-type sealing ring seal, so that the sealing and protection functions are realized. A tubular spring 19 is arranged on the inner side of the lower connector 20 and used for elastically supporting the throttle valve sleeve 16 to play a role in automatic resetting; the piston 17 is arranged in the lower spindle inner space, and the piston 17 is used for driving the throttle valve sleeve 16 to move upwards.

The utility model provides a flow control valve in pit with adjustable flow can regard as the flow control module among intelligent well completion system, intelligent layering water injection system, layering multistage fracturing system or other layering operation systems, through with the cooperation of flow monitoring system in the pit, can realize the accurate regulation of flow under the different pressure differential condition in the pit, provide effectual control instrument for optimizing exploitation and water injection.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a downhole flow control valve with adjustable flow which characterized in that: the device sequentially comprises a main shaft, a pushing joint, an upper seal, a regulating ring, a middle seal, a pressure transmission shaft, a lower seal, a sliding sleeve, a reset sleeve, a locking block, a suspension sleeve, a bottom seal, a limiting sleeve, a switch door, a float releasing ring, a throttle valve sleeve, a lower main shaft and a lower joint from top to bottom; the suspension sleeve is abutted against the lower end of the main shaft, and the bottom of the suspension sleeve is hermetically abutted against the lower end of the suspension sleeve; the limiting sleeve is abutted against the lower end of the bottom seal; the main shaft, the hanging sleeve, the bottom seal and the limiting sleeve are connected through threads; the switch door and the float ring are arranged on the outer side wall of the limiting sleeve; the sliding sleeve slides up and down along with the movement of the transmission shaft, the reset sleeve is used for resetting the sliding sleeve and the transmission shaft, and the locking block is arranged at the edge part of the reset sleeve and used for locking the reset sleeve.

2. A flow adjustable downhole flow control valve according to claim 1, wherein: the throttle valve sleeve comprises a valve port, the throttle valve sleeve is movably arranged in the limiting sleeve, an opening is formed in the limiting sleeve, when the throttle valve sleeve moves downwards, the valve port of the throttle valve sleeve crosses the bottom seal, the opening is opened, and a liquid circulation channel is formed by the valve port and the opening.

3. A flow adjustable downhole flow control valve according to claim 1, wherein: the inner side of the lower joint is provided with a tubular spring for elastically supporting the throttle valve sleeve, and a piston is arranged in a gap on the inner side of the main shaft and used for driving the throttle valve sleeve to move upwards.