Fluid end opening and closing device for screw drill

Abstract

The utility model discloses a fluid end opening and closing device for a screw drill, which relates to the technical field of petroleum drilling and comprises a valve body and a movable cavity, a first differential pressure transducer is arranged at an inlet of the valve body, and the movable cavity is arranged above the inside of the valve body. The adjusting assembly comprises a reset spring, a lifting plate, a pressure sensor, a three-way pipe, a first pressure conveying pipeline, a second pressure conveying pipeline, a first ball valve and a second ball valve, and the pressure sensor is placed below the lifting plate. According to the hydraulic end opening and closing device for the screw drill, when the first ball valve is closed and the second ball valve is opened, liquid enters the three-way pipe along the second pressure conveying pipeline, and then pressure is formed above the lifting plate, so that the lifting plate overcomes the elastic force of the reset spring to move downwards to be in contact with the pressure sensor; at the moment, the pressure sensor generates induction and collects received pressure data, the control module converts received electric signals into corresponding control signals so as to control the hydraulic cylinder to work, and closing of the valve body is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to a hydraulic end opening and closing device for a screw drill. Background Art

[0002] Hydraulic end opening and closing devices are widely used in screw drilling tools. For example, the bypass valves in LZ and L-type screw drilling tools utilize hydraulic opening and closing. Hydraulic force acts as the driving force to control the opening and closing of the bypass valve. When the hydraulic force changes, the internal structure of the bypass valve reacts accordingly, opening or closing the channel. This helps effectively control the flow path of the drilling fluid during drilling, ensuring normal drilling operations, improving drilling efficiency, and preventing contaminants in the wellbore from entering areas such as the drilling platform.

[0003] For example, the utility model application number CN202110419425.6 discloses a hydraulic end opening and closing device for a plunger pump. This device disperses the impact force of the liquid through at least two flow channels and enhances the sealing performance of the valve disc through elastic components, thereby extending the service life of the valve seat and disc, thereby improving operating efficiency and the pumping efficiency of the plunger pump. However, sealing solely through the combination of pressure and springs can lead to incomplete sealing over time, resulting in liquid leakage.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a hydraulic end opening and closing device for screw drilling tools is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a hydraulic end opening and closing device for a screw drill to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a hydraulic end opening and closing device for a screw drill, comprising a valve body and an active chamber, a pressure differential sensor 1 being provided at the inlet of the valve body, and a pressure differential sensor 2 being provided at the outlet of the valve body, the active chamber being provided above the interior of the valve body, and an adjusting component being provided in the active chamber, the adjusting component comprising a reset spring, a lifting plate, a pressure sensor, a tee pipe, a pressure delivery pipeline 1, a pressure delivery pipeline 2, a ball valve 1 and a ball valve 2, and a lifting plate being provided on the top of the reset spring, a pressure sensor being placed under the lifting plate, a tee pipe being provided through the top of the valve body, and two ends of the tee pipe being connected to a pressure delivery pipeline 1 and a pressure delivery pipeline 2 respectively, a ball valve 1 being installed on the pressure delivery pipeline 1, a ball valve 2 being installed on the pressure delivery pipeline 2, a hydraulic cylinder being installed inside the valve body, and a valve disc being provided at the output end of the hydraulic cylinder.

[0007] Furthermore, the differential pressure sensor 1 and the differential pressure sensor 2 are both electrically connected to the control module, and the control module is electrically connected to the hydraulic cylinder.

[0008] Furthermore, the pressure sensor is disposed inside the active cavity, and the pressure sensor is electrically connected to the control module.

[0009] Furthermore, two return springs are provided, and the lifting plate is elastically connected to the valve body through the return springs.

[0010] Furthermore, the two detection ends of the pressure difference sensor 1 are respectively arranged at the inlet of the valve body and in the active cavity, and the two detection ends of the pressure difference sensor 2 are respectively arranged at the outlet of the valve body and in the active cavity.

[0011] Furthermore, the lifting plate is located at one end of the tee away from the pressure delivery pipeline 1 and the pressure delivery pipeline 2, and the end of the pressure delivery pipeline 1 away from the tee is fixedly connected to the valve body.

[0012] The utility model provides a hydraulic end opening and closing device for a screw drill, which has the following beneficial effects:

[0013] 1. When the utility model closes ball valve one and opens ball valve two, the liquid will enter the tee along pressure delivery pipeline two, and then form pressure above the lifting plate, causing the lifting plate to overcome the elastic force of the return spring and move downward to contact the pressure sensor. At this time, the pressure sensor generates induction and collects the received pressure data. The control module converts the received electrical signal into a corresponding control signal to control the operation of the hydraulic cylinder and complete the closure of the valve body.

[0014] 2. In this utility model, when the pressure of the medium acts on the inlet and the active chamber of the valve body, the differential pressure sensor will sense the pressure difference between the two chambers and convert it into an electrical signal output. The control module will convert the received electrical signal into a corresponding control signal to control the operation of the hydraulic cylinder, thereby realizing automatic adjustment of flow or pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of a valve body of a hydraulic end opening and closing device for a screw drill according to the present invention;

[0016] Figure 2 The utility model is a hydraulic end opening and closing device for a screw drill Figure 1 A in the middle is an enlarged structural diagram;

[0017] Figure 3 The utility model is a schematic diagram of the circuit principle of a hydraulic end opening and closing device for a screw drill.

[0018] In the figure: 1. Valve body; 2. Pressure differential sensor 1; 3. Pressure differential sensor 2; 4. Active chamber; 5. Adjustment assembly; 501. Return spring; 502. Lifting plate; 503. Pressure sensor; 504. Tee; 505. Pressure delivery pipeline 1; 506. Pressure delivery pipeline 2; 507. Ball valve 1; 508. Ball valve 2; 6. Hydraulic cylinder; 7. Valve disc. DETAILED DESCRIPTION

[0019] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] like Figures 1 to 3 As shown, a hydraulic end opening and closing device for a screw drill comprises a valve body 1 and an active chamber 4. The active chamber 4 is arranged above the interior of the valve body 1, and an adjusting component 5 is arranged in the active chamber 4. The adjusting component 5 comprises a reset spring 501, a lifting plate 502, a pressure sensor 503, a tee 504, a pressure delivery pipeline 1 505, a pressure delivery pipeline 2 506, a ball valve 1 507 and a ball valve 2 508. A lifting plate 502 is arranged on the top of the reset spring 501, and a pressure sensor 503 is placed below the lifting plate 502. A tee 504 is arranged on the top of the valve body 1, and both ends of the tee 504 are connected to pressure regulators 501 and 502. Force delivery pipeline 1 505 and pressure delivery pipeline 2 506, ball valve 1 507 is installed on pressure delivery pipeline 1 505, ball valve 2 508 is installed on pressure delivery pipeline 2 506, the pressure sensor 503 is arranged inside the active chamber 4, and the pressure sensor 503 is electrically connected to the control module, two reset springs 501 are provided, and the lifting plate 502 is elastically connected to the valve body 1 through the reset spring 501, the lifting plate 502 is located at one end of the tee pipe 504 away from the pressure delivery pipeline 1 505 and the pressure delivery pipeline 2 506, and the end of the pressure delivery pipeline 1 505 away from the tee pipe 504 is fixedly connected to the valve body 1.

[0021] The specific operation is as follows: when ball valve 1 507 is closed and ball valve 2 508 is opened, the liquid will enter the tee pipe 504 along the pressure delivery pipeline 2 506, and then form pressure above the lifting plate 502, so that the lifting plate 502 overcomes the elastic force of the return spring 501 and moves downward to contact the pressure sensor 503. At this time, the pressure sensor 503 generates induction and collects the received pressure data. The control module converts the received electrical signal into a corresponding control signal to control the operation of the hydraulic cylinder 6 and complete the closing of the valve body 1.

[0022] like Figure 1 and Figure 3As shown, a differential pressure sensor 1 2 is provided at the inlet of the valve body 1, and a differential pressure sensor 2 3 is provided at the outlet of the valve body 1. A hydraulic cylinder 6 is installed inside the valve body 1, and a valve disc 7 is provided at the output end of the hydraulic cylinder 6. The differential pressure sensor 1 2 and the differential pressure sensor 2 3 are both electrically connected to the control module, and the control module is electrically connected to the hydraulic cylinder 6. The two detection ends of the differential pressure sensor 1 2 are respectively provided at the inlet of the valve body 1 and in the active cavity 4, and the two detection ends of the differential pressure sensor 2 3 are respectively provided at the outlet of the valve body 1 and in the active cavity 4.

[0023] The specific operation is as follows: when the pressure of the medium acts on the inlet of the valve body 1 and the active chamber 4, the differential pressure sensor 2 will sense the pressure difference between the two chambers and convert it into an electrical signal output. The control module will convert the received electrical signal into a corresponding control signal to control the operation of the hydraulic cylinder 6, thereby realizing automatic adjustment of flow or pressure.

[0024] In summary, when the hydraulic end opening and closing device for the screw drill is used, first, the differential pressure sensor 1 2, the differential pressure sensor 2 3, and the pressure sensor 503 are all electrically connected to the control module. When the ball valve 1 507 is closed and the ball valve 2 508 is opened, the liquid will enter the tee pipe 504 along the pressure delivery pipeline 2 506. Since the tee pipe 504 and the active chamber 4 are interconnected, the lifting plate 502 is subjected to the pressure of the liquid and overcomes the rebound of the return spring 501 to move downward until the pressure sensor 503 generates a sense and collects the pressure data.

[0025] At the same time, the pressure of the medium acts on the inlet of the valve body 1 and the active chamber 4. The differential pressure sensor 2 will sense the pressure difference between the two chambers and convert it into an electrical signal output. When the pressure data is greater than the threshold or the pressure difference between the two chambers is large, the control module will convert the received electrical signal into a corresponding control signal to control the operation of the hydraulic cylinder 6. The hydraulic cylinder 6 drives the valve disc 7 to move, so that the valve disc 7 completes the closure of the valve body 1. Since the power is provided by the hydraulic cylinder 6, it ensures that the valve disc 7 completely closes the valve body 1 to avoid liquid leakage in the closed state.

[0026] When ball valve 1 507 is opened and ball valve 2 508 is closed, the pressure of the medium acts on the outlet of valve body 1 and active chamber 4. Differential pressure sensor 2 3 senses the pressure difference between the two chambers and converts it into an electrical signal output. The control module converts the received electrical signal into a corresponding control signal to control the operation of hydraulic cylinder 6, thereby driving valve disc 7 to move through hydraulic cylinder 6, so that valve disc 7 completes the opening of valve body 1.

[0027] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A hydraulic end opening and closing device for a screw drill, comprising a valve body (1) and a movable chamber (4), characterized in that: A differential pressure sensor (2) is provided at the inlet of the valve body (1), and a differential pressure sensor (3) is provided at the outlet of the valve body (1). The movable chamber (4) is provided above the interior of the valve body (1), and an adjusting assembly (5) is provided in the movable chamber (4). The adjusting assembly (5) includes a reset spring (501), a lifting plate (502), a pressure sensor (503), a three-way pipe (504), a pressure delivery pipeline (505), a pressure delivery pipeline (506), a ball valve (507) and a ball valve (508). The top of the reset spring (501) is provided with a pressure sensor (507). There is a lifting plate (502), a pressure sensor (503) is placed below the lifting plate (502), a three-way pipe (504) is provided through the top of the valve body (1), and the two ends of the three-way pipe (504) are respectively connected to a pressure delivery pipeline 1 (505) and a pressure delivery pipeline 2 (506), a ball valve 1 (507) is installed on the pressure delivery pipeline 1 (505), and a ball valve 2 (508) is installed on the pressure delivery pipeline 2 (506), a hydraulic cylinder (6) is installed inside the valve body (1), and a valve disc (7) is provided at the output end of the hydraulic cylinder (6).

2. The hydraulic end opening and closing device for a screw drill according to claim 1, characterized in that: The differential pressure sensor 1 (2) and the differential pressure sensor 2 (3) are both electrically connected to the control module, and the control module is electrically connected to the hydraulic cylinder (6).

3. The hydraulic end opening and closing device for a screw drill according to claim 1, characterized in that: The pressure sensor (503) is arranged inside the active chamber (4), and the pressure sensor (503) is electrically connected to the control module.

4. The hydraulic end opening and closing device for a screw drill according to claim 1, characterized in that: Two return springs (501) are provided, and the lifting plate (502) is elastically connected to the valve body (1) via the return springs (501).

5. The hydraulic end opening and closing device for a screw drill according to claim 1, characterized in that: The two detection ends of the pressure differential sensor 1 (2) are respectively arranged at the inlet of the valve body (1) and in the active cavity (4), and the two detection ends of the pressure differential sensor 2 (3) are respectively arranged at the outlet of the valve body (1) and in the active cavity (4).

6. The hydraulic end opening and closing device for a screw drill according to claim 1, characterized in that: The lifting plate (502) is located at one end of the three-way pipe (504) away from the pressure delivery pipeline 1 (505) and the pressure delivery pipeline 2 (506), and the end of the pressure delivery pipeline 1 (505) away from the three-way pipe (504) is fixedly connected to the valve body (1).

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