CN213269822U

CN213269822U - Hydraulic control system capable of remotely controlling setting of liner hanger

Info

Publication number: CN213269822U
Application number: CN202022191124.6U
Authority: CN
Inventors: 冯建宇; 杨勇
Original assignee: BEIJING LIUHE GREATNESS TECHNOLOGY CO LTD
Current assignee: BEIJING LIUHE GREATNESS TECHNOLOGY CO LTD
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-05-25
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a but hydraulic control system of remote control liner hanger seat seal, including shell body, drilling tool and taper sleeve, the drilling tool is installed in shell body inner chamber, and the taper sleeve is installed in the drilling tool outside, equipartition slips between taper sleeve outer wall and the shell body inner wall, and pneumatic cylinder and battery pack are installed respectively to the taper sleeve bottom, and the pneumatic cylinder is connected with the hydraulic control unit, and battery pack and circuit unit electrical connection, circuit unit and hydraulic control unit are connected, the utility model discloses the theory of operation is simple, but adopts the hydraulic control system of remote control liner hanger seat seal, passes work order through opening and shutting the pump sequence on ground down, can realize realizing liner hanger safety seat seal under different well depths, temperature and pressure, has avoided throwing the ball to suppress all kinds of problems that the seat seal brought simultaneously.

Description

Hydraulic control system capable of remotely controlling setting of liner hanger

Technical Field

The utility model relates to an oil drilling technical field specifically is a but hydraulic control system of remote control liner hanger seat seal.

Background

Chinese patent CN111173466A "a liner hanger and its using method" discloses a liner hanger and its using method, the liner hanger includes a load transfer mechanism for transferring torque and axial force, a hanging mechanism for hanging liner, and a connecting mechanism for connecting the load transfer mechanism and the hanging mechanism. The linkage of all parts is controlled by adopting the spring, the traditional hydraulic driving mode for realizing tail pipe hanging is replaced, the problem of hanging in advance can not occur, and the use performance is excellent; in addition, through the design that adopts the spline and can fall back the round pin axle, make the liner hanger possess good moment of torsion load and axial force transfer function to utilize threaded connection structure and control moment of torsion direction, make the seat hang the mechanism and can be through rotatory and autosegregation, greatly made things convenient for the release of tail pipe, also made the overall structure of liner hanger become exquisite, easily control.

The tail pipe hanger adopts a ball-throwing pressure-building mode to realize sitting and hanging. When in use, the tail pipe hanger and the tail pipe are put into the well to the designed depth by matching with a special feeding tool. And (3) throwing the ball, when the ball reaches the ball seat, suppressing pressure, transmitting the pressure into the hydraulic cylinder through a pressure transmission hole on the hanger body, shearing a shear pin of the hydraulic cylinder, pushing the piston, the hydraulic cylinder, the push rod support sleeve and the slip to go upwards, expanding the slip along the conical surface, wedging the slip into an annular gap between a hanger cone (the C-shaped body is a taper sleeve) and an upper casing pipe, and when the drilling tool is lowered, supporting the weight of the tail pipe on the upper casing pipe. And continuing to pressurize, closing the ball seat and establishing normal circulation. And then carrying out back-off, cementing and replacing slurry operations. And finally, lifting the feeding tool and the sealing core away from the hanger, circulating redundant cement paste, and taking out the drill and waiting for setting.

In practice, the liner hanger has several problems as follows: due to the abrasion or deformation of the upper casing; the cone and the slips are damaged or the mechanism is unreasonably designed; a hydraulic cylinder failure; solid-phase particles of the high-density drilling fluid block the pressure transmission holes, so that the pressure cannot be transmitted to the hydraulic cylinder; solid phase particles block the pressure transfer holes to cause the failure of the sitting and hanging; depositing sand or solid phase around the screw thread; the selection of the neutralization point is inaccurate; the tail pipe hanger has poor material quality and rough machining process to cause the back-off failure of the tail pipe; short circuiting due to seal cartridge damage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but hydraulic control system of remote control liner hanger seat seal to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a hydraulic control system that can remote control liner hanger setting, includes shell body, drilling tool and taper sleeve, the drilling tool is installed in the shell body inner chamber, the taper sleeve is installed in the drilling tool outside, the equipartition slips between taper sleeve outer wall and the shell body inner wall, pneumatic cylinder and battery pack are installed respectively to the taper sleeve bottom, the pneumatic cylinder is connected with the hydraulic control unit, battery pack and circuit unit electrical connection, the circuit unit is connected with the hydraulic control unit.

Preferably, the hydraulic control unit comprises a balance piston, a valve assembly, an oil pump and a motor, wherein the oil pump is connected with the balance piston through the valve assembly, and the oil pump is connected with the motor.

Preferably, the valve module includes overflow valve and relief valve, the oil pump passes through pipeline and oil tank intercommunication, the oil pump is connected with differential pressure sensor, differential pressure sensor is connected with speed controller, speed controller is connected with the motor, set up the pipeline between differential pressure sensor and the oil tank, just overflow valve and relief valve are all installed in the pipeline.

Preferably, a vibration sensor is installed in the circuit unit.

Preferably, the battery assembly is a lithium battery.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the theory of operation is simple, but adopts the hydraulic control system of remote control liner hanger seat seal, passes the work order through the start-stop pump sequence on ground, can realize realizing liner hanger safety seat seal under different well depths, temperature and pressure, has avoided the bowling to suppress all kinds of problems that the seat seal brought simultaneously.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the hydraulic control unit of the present invention;

FIG. 3 is a schematic diagram of the hydraulic control unit of the present invention;

FIG. 4 is a schematic diagram of a circuit unit according to the present invention;

fig. 5 is a schematic diagram of the pump start/stop sequence on the ground and the number of pulses received on the ground according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the present invention provides a technical solution: a hydraulic control system capable of remotely controlling setting of a liner hanger comprises an outer shell 1, a drilling tool 2 and a taper sleeve 3, wherein the drilling tool 2 is installed in an inner cavity of the outer shell 1, the taper sleeve 3 is installed outside the drilling tool 2, slips 4 are uniformly distributed between the outer wall of the taper sleeve 3 and the inner wall of the outer shell 1, a hydraulic cylinder 5 and a battery pack 6 are respectively installed at the bottom end of the taper sleeve 3, and the battery pack 6 adopts a lithium battery; the hydraulic cylinder 5 is connected with a hydraulic control unit 7, the battery pack 6 is electrically connected with a circuit unit 8, and the circuit unit 8 is connected with the hydraulic control unit 7.

In the utility model, the hydraulic control unit 7 comprises a balance piston 9, a valve component 10, an oil pump 11 and a motor 12, wherein the oil pump 11 is connected with the balance piston 9 through the valve component 10, and the oil pump 11 is connected with the motor 12; the valve assembly 10 comprises an overflow valve 13 and a safety valve 14, the oil pump 11 is communicated with an oil tank 15 through a pipeline, the oil pump 11 is connected with a differential pressure sensor 16, the differential pressure sensor 16 is connected with a rotating speed controller 17, the rotating speed controller 17 is connected with a motor 12, a pipeline is arranged between the differential pressure sensor 16 and the oil tank 15, and the overflow valve 13 and the safety valve 14 are both installed on the pipeline.

The control unit consisting of the motor pump valve can realize the magnitude of underground hydraulic pressure, a required pressure value (as shown in figure 2) is set by controlling the rotating speed of the motor or adopting a closed-loop control mode, a control circuit monitors the hydraulic pressure in real time through a differential pressure sensor, and if the pressure is smaller than a set value, the rotating speed of the motor is increased; if the pressure is greater than the set value, the motor reduces the rotating speed; the pressure generated by the motor pump valve assembly is transmitted to a hydraulic cylinder of the tail pipe hanger through a balance piston, and both ends of the balance piston are filled with silicone oil. The motor pump valve subassembly produces the pressure value when the motor rotates, when pressure risees, can promote balanced piston to the hydraulic cylinder removal of liner hanger to promote the slips and go upward, realize that the hanger sits and hangs.

In order to sense the information of the on-off pump on the ground, a vibration sensor 18 is arranged in the circuit unit 8. Setting a vibration threshold, wherein when the ground is started to pump circulation, the vibration threshold is larger than a set value, and the downhole instrument receives opening information; then stopping the pump, sensing the pump stopping information by the vibration sensor, starting and stopping for three times (or adjusting according to the field) in this way, and starting to execute a motor working command when the underground circuit detects a working signal, so as to drag the oil pump to work, so that the hydraulic system generates pressure and complete subsequent work; in addition, the mud pulse generator and a ground system are adopted for carrying out underground working parameter interaction, in the downloading process, the number of pulses uploaded underground can be detected to see whether the pulses are downloaded in place, and after the pulses are successfully downloaded, the pulse generator can be used for uploading related data to see whether the motor pump valve assembly successfully works.

To sum up, the utility model discloses the theory of operation is simple, but adopts the hydraulic control system of remote control liner hanger seat seal, passes down the operating instruction through the start-stop pump sequence on ground, can realize realizing liner hanger safety seat seal under different well depths, temperature and pressure, has avoided the bowling to suppress all kinds of problems that the seat seal brought simultaneously.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a but hydraulic control system of remote control liner hanger setting, includes shell body (1), drilling tool (2) and taper sleeve (3), its characterized in that: drilling tool (2) are installed in shell body (1) inner chamber, taper sleeve (3) are installed in drilling tool (2) outside, equipartition slips (4) between taper sleeve (3) outer wall and shell body (1) inner wall, pneumatic cylinder (5) and battery pack (6) are installed respectively to taper sleeve (3) bottom, pneumatic cylinder (5) are connected with hydraulic control unit (7), battery pack (6) and circuit unit (8) electrical connection, circuit unit (8) are connected with hydraulic control unit (7).

2. The hydraulic control system of claim 1, wherein the hydraulic control system is configured to remotely control a liner hanger setting, the hydraulic control system comprising: the hydraulic control unit (7) comprises a balance piston (9), a valve assembly (10), an oil pump (11) and a motor (12), wherein the oil pump (11) is connected with the balance piston (9) through the valve assembly (10), and the oil pump (11) is connected with the motor (12).

3. The hydraulic control system of claim 2, wherein the hydraulic control system is configured to remotely control a liner hanger setting, the hydraulic control system comprising: the valve assembly (10) comprises an overflow valve (13) and a safety valve (14), the oil pump (11) is communicated with the oil tank (15) through a pipeline, the oil pump (11) is connected with a differential pressure sensor (16), the differential pressure sensor (16) is connected with a rotating speed controller (17), the rotating speed controller (17) is connected with a motor (12), a pipeline is arranged between the differential pressure sensor (16) and the oil tank (15), and the overflow valve (13) and the safety valve (14) are both installed on the pipeline.

4. The hydraulic control system of claim 1, wherein the hydraulic control system is configured to remotely control a liner hanger setting, the hydraulic control system comprising: a vibration sensor (18) is mounted in the circuit unit (8).

5. The hydraulic control system of claim 1, wherein the hydraulic control system is configured to remotely control a liner hanger setting, the hydraulic control system comprising: the battery component (6) adopts a lithium battery.