Oil well casing pressure adjusting device

Abstract

The invention relates to the technical field of petroleum and natural gas extraction, in particular to an oil well casing pressure adjusting device to solve the problems that an existing device cannot adjust oil pressure in real time, and the working intensity of workers is large. The device comprises a pressure regulating assembly and a monitoring assembly, the monitoring assembly comprises a pressure sensor communicated with the Christmas tree; the pressure regulating assembly comprises a pressure reducing valve communicated with the Christmas tree casing pipe; the pressure adjusting assembly can adjust the opening size of the pressure reducing valve according to a signal sent by the pressure sensor. According to the device, through real-time monitoring and automatic adjustment, the stability of oil well production is remarkably improved, the sand production risk caused by pressure fluctuation is reduced, the stratum is protected, and the recovery efficiency is improved. And meanwhile, the automation degree is high, the labor intensity of operators is reduced, and the accuracy and safety of operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas exploitation, and particularly relates to an oil well casing pressure adjusting device. BACKGROUND

[0002] In the process of oil well exploitation, reasonable control of casing pressure has an important influence on stable production of the oil well and recovery rate. At present, a gate valve is mainly used in the casing of the oil well to control casing pressure of the oil well. However, for the well with large gas volume and high casing pressure, when the valve of the gate valve is opened or closed, the pressure fluctuation is large, which leads to unstable production of the oil well, easy sand production of the oil well, influences the recovery rate, and even causes damage to the formation. In order to control the pressure in a reasonable range, the operator needs to frequently open and close the valve. If the valve is opened too large, the pressure is reduced, if the valve is opened too small, the pressure is increased, the control difficulty is large, the labor intensity of the personnel is high, and it is difficult to continuously maintain a reasonable pressure value. SUMMARY

[0003] The present application provides an oil well casing pressure adjusting device to alleviate the problem that the existing device cannot adjust oil pressure in real time and the working intensity of workers is large.

[0004] In order to alleviate the above technical problems, the technical scheme provided by the present application is as follows:

[0005] The present application provides an oil well casing pressure adjusting device, which comprises a pressure regulating assembly and a monitoring assembly.

[0006] The monitoring assembly comprises a pressure sensor in communication with a Christmas tree.

[0007] The pressure regulating assembly comprises a pressure reducing valve in communication with a casing of the Christmas tree.

[0008] The pressure regulating assembly can adjust the opening size of the pressure reducing valve according to the signal sent by the pressure sensor.

[0009] Further,

[0010] The pressure reducing valve comprises a valve stem and a valve body.

[0011] The valve body has an oil and gas flow channel penetrating through both ends and an adjusting channel perpendicular to the oil and gas flow channel.

[0012] The adjusting channel is in communication with the oil and gas flow channel.

[0013] The valve stem is arranged in the adjusting channel.

[0014] Further,

[0015] The valve stem is threadedly connected with the adjusting channel.

[0016] Further,

[0017] The valve rod can rotate in the range of 0° to 90°;

[0018] When the valve rod is in the 0° position, the oil and gas flow channel is completely closed;

[0019] When the valve rod is in the 90° position, the oil and gas flow channel is completely open.

[0020] Further,

[0021] The valve rod comprises a one-key switch;

[0022] The one-key switch is arranged at one end of the valve rod away from the valve body.

[0023] Further,

[0024] The pressure regulating assembly further comprises a controller;

[0025] The controller is arranged on the upper part of the pressure reducing valve;

[0026] The controller comprises a rotating part and a signal receiving unit;

[0027] The rotating part is connected with the one-key switch;

[0028] The signal receiving unit is electrically connected with the rotating part;

[0029] The signal receiving unit can receive the signal of the pressure sensor and control the rotation of the rotating part.

[0030] Further,

[0031] The controller further comprises a manual switch;

[0032] The manual switch is electrically connected with the rotating part.

[0033] The beneficial effects of the present application are as follows:

[0034] The device has the advantages that through real-time monitoring and automatic adjustment, the stability of oil well production is significantly improved, the risk of sand production caused by pressure fluctuation is reduced, the formation is protected, and the recovery efficiency is improved. At the same time, the degree of automation is high, the labor intensity of the operating personnel is reduced, and the accuracy and safety of operation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the specific embodiments or related art, the drawings needed to be used in the specific embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0036] Fig. 1It is a schematic view of the installation structure of the present application;

[0037] Fig. 2 It is a schematic view of the structure of the pressure reducing valve;

[0038] Fig. 3 It is a schematic view of the structure of the controller.

[0039] Icon:

[0040] 100 - pressure regulating assembly; 110 - pressure reducing valve; 111 - valve stem; 112 - valve body; 113 - oil and gas flow channel; 114 - regulating channel; 115 - on-off switch; 120 - controller; 121 - rotating part; 122 - signal receiving unit; 123 - manual switch;

[0041] 200 - monitoring assembly; 210 - pressure sensor;

[0042] 300 - Christmas tree. DETAILED DESCRIPTION

[0043] At present, the main method for controlling the casing pressure of an oil well is to use a gate valve. However, for an oil well with a large amount of gas and a high casing pressure, the pressure fluctuation is large when the valve of the gate valve is opened or closed, which leads to unstable oil well production, easy sand production, and influences the recovery rate, and even causes damage to the formation. In order to control the pressure within a reasonable range, the operator needs to frequently open and close the valve. If the valve is opened too wide, the pressure will be reduced, and if the valve is opened too narrow, the pressure will be increased. Therefore, it is difficult to control, the labor intensity of the personnel is high, and it is difficult to continuously maintain a reasonable pressure value.

[0044] Therefore, the present application provides an oil well casing pressure regulating device, as shown in the accompanying drawings, which comprises a pressure regulating assembly 100 and a monitoring assembly 200. Figs. 1 to 3

[0045] The monitoring assembly 200 comprises a pressure sensor 210 in communication with a Christmas tree 300.

[0046] The pressure regulating assembly 100 comprises a pressure reducing valve 110 in communication with a casing of the Christmas tree 300.

[0047] The pressure regulating assembly 100 can adjust the opening size of the pressure reducing valve 110 according to the signal sent by the pressure sensor 210.

[0048] ​The pressure sensor 210 can set a reasonable pressure range according to the oil well production condition, can monitor the pressure value of the casing in real time after being communicated with the Christmas tree, the pressure reducing valve 110 is communicated with the normally open casing of the Christmas tree, the pressure in the casing can be adjusted in real time by the on-off of the pressure reducing valve 110, the pressure regulating assembly 100 can control the on-off of the pressure reducing valve 110 in time after receiving the signal of the pressure sensor 210, the present scheme realizes real-time monitoring and accurate adjustment of the pressure in the casing, improves the production stability, has high automation degree, reduces the labor intensity of workers, and improves the recovery efficiency of the oil well.

[0049] As shown in Fig. 2 The pressure reducing valve 110 comprises a valve stem 111 and a valve body 112;

[0050] The valve body 112 has an oil and gas flow channel 113 penetrating through two ends and an adjusting channel 114 perpendicular to the oil and gas flow channel 113;

[0051] The adjusting channel 114 is communicated with the oil and gas flow channel 113;

[0052] The valve stem 111 is arranged in the adjusting channel 114;

[0053] The valve stem 111 is threadedly connected with the adjusting channel 114;

[0054] The valve stem 111 can rotate in the range of 0° to 90°;

[0055] When the valve stem 111 is in the 0° position, the oil and gas flow channel 113 is completely closed;

[0056] When the valve stem 111 is in the 90° position, the oil and gas flow channel 113 is completely opened;

[0057] The valve stem 111 comprises a one-word switch 115;

[0058] The one-word switch 115 is arranged at one end of the valve stem 111 away from the valve body 112.

[0059] Specifically, the pressure reducing valve 110 is provided with a clamping groove communicated with the sleeve at both ends, one end is communicated with the sleeve of the oil well Christmas tree, the other end is communicated with the pressure relief sleeve, the oil and gas flow channel 113 has an internal thread matched with the valve stem 111, when the valve stem 111 moves towards the valve body 112 and completely extends into the adjusting channel 114, the oil and gas flow channel 113 will be completely blocked; when the valve stem 111 moves away from the valve body 112, the two ends of the oil and gas flow channel 113 will be gradually communicated, preferably, the bottom of the valve stem 111 has a sharp end made of sealing material, the adjusting channel 114 has a groove matched with the sharp end of the valve stem 111, so as to improve the air tightness when the oil and gas flow channel 113 is completely closed, a plurality of sealing rings can be arranged at the pipe opening of the adjusting channel 114 close to one end of the slider switch 115, so as to improve the air tightness when the oil and gas flow channel 113 is completely opened, the cross section of the slider switch 115 is preferably rectangular, so as to facilitate manual adjustment by workers using tools, avoiding installation and debugging difficulties caused by oil stains, of course, the cross section of the slider switch 115 can also be other shapes such as wrench hexagonal.

[0060] As shown in Fig. 3 the pressure regulating assembly 100 further comprises a controller 120;

[0061] The controller 120 is arranged on the upper part of the pressure reducing valve 110;

[0062] The controller 120 comprises a rotating part 121 and a signal receiving unit 122;

[0063] The rotating part 121 is clamped with the slider switch 115;

[0064] The signal receiving unit 122 is electrically connected with the rotating part 121;

[0065] The signal receiving unit 122 can receive the signal of the pressure sensor 210 and control the rotation of the rotating part 121;

[0066] The controller 120 further comprises a manual switch 123;

[0067] The manual switch 123 is electrically connected with the rotating part 121.

[0068] Specifically, the rotating part 121 has a clamping groove matched with the slider switch 115, the slider switch 115 can rotate with the rotating part 121, the controller 120 is provided with a driving motor, the output shaft of the driving motor is fixedly connected with the rotating part 121, after the signal receiving unit 122 receives the signal of the pressure sensor 210, it will send a signal to the driving motor to control the rotation of the rotating part 121, so as to make the valve stem 111 rise or fall.

[0069] The beneficial effects of the present scheme are as follows:

[0070] The scheme aims at the problem of oil well casing pressure control, and proposes an efficient oil well casing pressure regulating device, which comprises a pressure regulating assembly 100 and a monitoring assembly 200, so as to realize the automatic and accurate control of the oil well casing pressure. The traditional control mode of the gate valve causes large pressure fluctuation and unstable production in wells with large gas volume and high casing pressure due to frequent opening and closing, which easily causes sand production of the oil well, affects the recovery rate, and even damages the formation. In order to maintain a reasonable pressure value, the operator needs to frequently adjust the valve, which is difficult to control and has high labor intensity, and it is difficult to maintain for a long time.

[0071] The monitoring assembly of the scheme comprises a pressure sensor 210 in communication with the Christmas tree, which can monitor the pressure value in the casing in real time, and set a reasonable pressure range according to the production condition of the oil well. The pressure regulating assembly 100 comprises a pressure reducing valve 110 in communication with the casing of the Christmas tree, which can automatically adjust the opening size of the pressure reducing valve 110 according to the signal sent by the pressure sensor 210. The design of the pressure reducing valve 110 ensures that the pressure in the casing can be adjusted in real time after receiving the signal of the pressure sensor 210, realizing the real-time monitoring and accurate adjustment of the pressure in the casing.

[0072] Specifically, the pressure reducing valve 110 comprises a valve stem 111 and a valve body 112, and the valve body 112 has a through oil and gas flow channel 113 and a vertical adjusting channel 114. The valve stem 111 is arranged in the adjusting channel 114 through threaded connection, and can be rotated within the range of 0° to 90°, so as to realize the complete closing or opening of the oil and gas flow channel 113. The pressure regulating assembly 100 further comprises a controller 120, which receives the signal of the pressure sensor 210 through a signal receiving unit 122, and controls the lifting of the valve stem 111 through a rotating part 121, so as to realize the automatic adjustment of the valve. In addition, the controller 120 is also provided with a manual switch 123, which is convenient for the operator to manually adjust.

[0073] The device has the advantages that through real-time monitoring and automatic adjustment, the stability of oil well production is significantly improved, the risk of sand production caused by pressure fluctuation is reduced, the formation is protected, and the recovery efficiency is improved. At the same time, the degree of automation is high, the labor intensity of the operator is reduced, and the accuracy and safety of the operation are improved. Overall, the scheme realizes the efficient control of the casing pressure of the oil well through intelligent design, and optimizes the production process of the oil well.

[0074] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An oil well casing pressure regulating device, characterized in that: comprising a pressure regulating assembly (100) and a monitoring assembly (200); the monitoring assembly (200) comprises a pressure sensor (210) in communication with the Christmas tree (300); the pressure regulating assembly (100) comprises a pressure reducing valve (110) in communication with the Christmas tree (300); the pressure regulating assembly (100) can adjust the opening size of the pressure reducing valve (110) according to the signal sent by the pressure sensor (210).

2. The oil well casing pressure regulating device according to claim 1, characterized in that: the pressure reducing valve (110) comprises a valve stem (111) and a valve body (112); the valve body (112) has an oil and gas flow channel (113) passing through both ends and an adjusting channel (114) perpendicular to the oil and gas flow channel (113); the adjusting channel (114) is in communication with the oil and gas flow channel (113); the valve stem (111) is arranged in the adjusting channel (114).

3. The oil well casing pressure regulating device according to claim 2, characterized in that: the valve stem (111) is threadedly connected with the adjusting channel (114).

4. The oil well casing pressure regulating device according to claim 3, characterized in that: the valve stem (111) can rotate within a range of 0° to 90°; when the valve stem (111) is at 0° position, the oil and gas flow channel (113) is completely closed; when the valve stem (111) is at 90° position, the oil and gas flow channel (113) is completely opened.

5. The oil well casing pressure regulating device according to claim 4, characterized in that: the valve stem (111) comprises a bar switch (115); the bar switch (115) is arranged at one end of the valve stem (111) away from the valve body (112).

6. The oil well casing pressure regulating device according to claim 5, characterized in that: the pressure regulating assembly (100) further comprises a controller (120); the controller (120) is arranged on the upper part of the pressure reducing valve (110); the controller (120) comprises a rotating part (121) and a signal receiving unit (122); the rotating part (121) is clamped with the bar switch (115); the signal receiving unit (122) is electrically connected with the rotating part (121); the signal receiving unit (122) can receive the signal of the pressure sensor (210) and control the rotation of the rotating part (121).

7. The oil well casing pressure regulating device according to claim 6, characterized in that: the controller (120) further comprises a manual switch (123); the manual switch (123) is electrically connected with the rotating part (121). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Images