A pressure acquisition device for a cementing job site

Abstract

The utility model discloses a kind of well cementing operation site pressure acquisition devices, including tee pipe, pressure acquisition end, plugging mechanism, connecting pipe assembly, pressure rod and pressure sensor, by being provided with plugging mechanism, plugging ball is provided in plugging mechanism, and by design telescopic rod assembly and connecting rod, pressure rod's mechanical linkage mechanism, operator only needs to rotate knob to control pressure rod to press down or rise, after installing connecting pipe assembly, by controlling pressure rod to press down plugging ball, after pressure sensor is installed, it can detect well pressure, when not installing connecting pipe assembly, well pressure can promote plugging ball automatic plugging and the through-hole of upper shell and lower shell, realize the automatic sealing of pressure acquisition end, effectively prevent well fluid leakage, reduce operation safety risk, simultaneously, safely install or disassemble entire connecting pipe assembly and pressure sensor under pressure state, need not stop pump pressure relief, improve the continuity and overall operation efficiency of well cementing operation.

Description

Technical Field

[0001] This utility model relates to the field of cementing operation technology, specifically to a cementing operation site pressure acquisition device. Background Technology

[0002] In oil and gas drilling cementing operations, real-time and accurate monitoring of wellhead pressure is crucial for ensuring operational safety and assessing cementing quality. Currently, pressure data is typically acquired by directly installing pressure sensors at the pressure acquisition ports of high-pressure manifolds (such as tees and crosses). However, this traditional method has significant drawbacks:

[0003] When installing, replacing, or removing pressure sensors, the pump must be stopped and the pressure of the entire manifold system released, resulting in work interruption and low efficiency. Furthermore, after removing the sensor, the pressure acquisition port is left open, posing a risk of accidental ejection of high-pressure fluid from the well, which seriously threatens the safety of personnel and equipment.

[0004] Therefore, there is an urgent need for a cementing operation site pressure acquisition device that can automatically seal the pressure port after disassembly to ensure the continuity and safety of the operation. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a pressure acquisition device for cementing operations, which solves the aforementioned problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a cementing operation site pressure acquisition device, including a three-way pipe, a pressure acquisition end, a plugging mechanism, a connecting pipe assembly, a pressure rod, and a pressure sensor. The plugging mechanism is disposed at the pressure acquisition end of the three-way pipe, and a connecting pipe assembly is installed on the top of the plugging mechanism, and a pressure sensor is installed on the top of the connecting pipe assembly.

[0009] The sealing mechanism includes a lower shell, an upper shell, a limiting cavity, and a sealing ball. The top edge of the lower shell is fixedly connected to the upper shell, and a limiting cavity is formed between the lower shell and the upper shell. The sealing ball is disposed in the limiting cavity. The lower shell is connected to the pressure acquisition end of the three-way pipe, and the top of the upper shell is connected to the connecting pipe assembly. The connecting pipe assembly, the limiting cavity, and the pressure acquisition end of the three-way pipe are interconnected. A pressure rod is provided at the bottom of the inner part of the connecting pipe assembly.

[0010] Preferably, the inner diameters of the through holes at the bottom of the lower shell and the top of the upper shell are both smaller than the diameter of the sealing ball.

[0011] Preferably, the connecting pipe assembly includes a straight pipe, a channel, a limiting ring, a connecting rod, and a telescopic rod assembly. The straight pipe has a channel in its inner middle, and a limiting ring is fixed at the bottom of the inner wall of the channel. The pressure rod vertically passes through the limiting ring, and the top end of the pressure rod is rotatably connected to one end of the connecting rod via a rotating shaft. The other end of the connecting rod is rotatably connected to the telescopic rod assembly via a rotating shaft. The telescopic rod assembly is located on the side of the straight pipe. The bottom edge of the straight pipe is threaded to the upper shell, and the top end of the straight pipe is fixedly connected to the pressure sensor.

[0012] Preferably, the telescopic rod assembly includes a threaded tube, a knob, a push block, a movable rod, a fixing ring, a pin, and a socket. The outer wall of the threaded tube is threadedly connected to the knob. The push block is fixed inside the knob and embedded inside the threaded tube. One end of the movable rod is connected to the push block, and the other end of the movable rod is rotatably connected to a connecting rod via a rotating shaft. A fixing ring is provided on the outer wall of the knob near the straight tube. The threaded tube is located on the outer wall of the straight tube, and a socket corresponding to the fixing ring is opened on the outer wall of the straight tube. The pin passes through the fixing ring and is inserted into the socket.

[0013] Preferably, the movable rod is arranged in a horizontal direction.

[0014] Preferably, the limiting ring includes an outer ring, a connecting rod, and an inner ring. The outer ring and the inner ring are concentrically arranged and connected by the connecting rod. The outer ring is embedded in the bottom end of the inner wall of the straight pipe and is fixedly connected to the straight pipe by bolts.

[0015] Preferably, the pressure rod vertically penetrates the inner ring, and the inner wall of the inner ring is in contact with the pressure rod.

[0016] (III) Beneficial Effects

[0017] This utility model provides a pressure acquisition device for cementing operations. It offers the following advantages: By incorporating a sealing mechanism with a sealing ball, and through a mechanical linkage between the telescopic rod assembly, connecting rod, and pressure rod, the operator can control the pressure rod's downward or upward movement simply by rotating a knob. After installing the connecting pipe assembly, controlling the pressure rod to press down the sealing ball prevents it from blocking the channel, allowing the pressure sensor to detect well pressure. When the connecting pipe assembly is not installed, the well pressure can push the sealing ball to automatically seal the through-holes between the upper and lower shells, achieving automatic sealing of the pressure acquisition end, effectively preventing well fluid leakage, and reducing operational safety risks. Furthermore, it allows for safe installation or removal of the entire connecting pipe assembly and pressure sensor under pressure without stopping the pump to release pressure, significantly reducing non-productive time and improving the continuity and overall efficiency of cementing operations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the sealing mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the connecting pipe assembly in this utility model;

[0021] Figure 4 This utility model Figure 3 A magnified view of a portion of area A;

[0022] Figure 5 This is a bottom view of the limiting ring assembly structure in this utility model.

[0023] In the diagram: 1. Tee-connector - 2. Pressure acquisition end - 3. Sealing mechanism - 4. Connecting pipe assembly - 5. Pressure rod - 6. Pressure sensor;

[0024] Lower shell-31, upper shell-32, limiting cavity-33, sealing ball-34;

[0025] Straight pipe-41, channel-42, limit ring-43, connecting rod-44, telescopic rod assembly-45;

[0026] Outer ring-431, connecting rod-432, inner ring-433;

[0027] Threaded pipe-451, knob-452, push block-453, movable rod-454, retaining ring-455, pin-456, insertion hole-457. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0029] Example 1: A pressure acquisition device for cementing operations, referring to... Figure 1 It includes a three-way pipe 1, a pressure acquisition end 2, a sealing mechanism 3, a connecting pipe assembly 4, a pressure rod 5, and a pressure sensor 6. The sealing mechanism 3 is located at the pressure acquisition end 2 of the three-way pipe 1. The connecting pipe assembly 4 is installed on the top of the sealing mechanism 3, and the pressure sensor 6 is installed on the top of the connecting pipe assembly 4.

[0030] Reference Figure 2The sealing mechanism 3 includes a lower shell 31, an upper shell 32, a limiting cavity 33, and a sealing ball 34. The top edge of the lower shell 31 is fixedly connected to the upper shell 32. A limiting cavity 33 is formed between the lower shell 31 and the upper shell 32. The sealing ball 34 is disposed in the limiting cavity 33. The lower shell 31 is connected to the pressure acquisition end 2 of the three-way pipe 1. The top of the upper shell 32 is connected to the connecting pipe assembly 4. The connecting pipe assembly 4, the limiting cavity 33, and the pressure acquisition end 2 of the three-way pipe 1 are interconnected. A pressure rod 5 is provided at the bottom of the connecting pipe assembly 4. The pressure rod 5 is used to limit the upward movement of the sealing ball 34. The lower shell 31 and the pressure acquisition end 2 of the three-way pipe 1 are integrally formed.

[0031] The inner diameters of the through holes at the bottom of the lower shell 31 and the top of the upper shell 32 are both smaller than the diameter of the sealing ball 34. When the connecting pipe assembly 4 is not installed, the internal pressure of the tee pipe 1 acts on the sealing ball 34, and the sealing ball 34 moves upward to block the through hole between the lower shell 31 and the upper shell 32, thereby achieving the effect of automatically blocking the pressure acquisition end 2 of the tee pipe 1.

[0032] Reference Figure 3 The connecting pipe assembly 4 includes a straight pipe 41, a channel 42, a limiting ring 43, a connecting rod 44, and a telescopic rod assembly 45. The straight pipe 41 has a channel 42 in its inner middle. The limiting ring 43 is fixed at the bottom of the inner wall of the channel 42. The pressure rod 5 passes vertically through the limiting ring 43. The top end of the pressure rod 5 is rotatably connected to one end of the connecting rod 44 through a rotating shaft. The other end of the connecting rod 44 is rotatably connected to the telescopic rod assembly 45 through a rotating shaft. The telescopic rod assembly 45 is located on the side of the straight pipe 41. The bottom edge of the straight pipe 41 is threadedly connected to the upper shell 32. The top end of the straight pipe 41 is fixedly connected to the pressure sensor 6.

[0033] The sensing probe of the pressure sensor 6 is located at the top of the channel 42. Sealing rings are provided at the connection between the straight tube 41 and the upper shell 32 and the pressure sensor 6. A sealing ring is also provided between the upper shell 32 and the lower shell 31 to ensure the sealing effect in the pressure detection channel. The pressure sensor 6 is a mature existing technology, and its working principle will not be described in detail.

[0034] Reference Figure 5 The limiting ring 43 includes an outer ring 431, a connecting rod 432, and an inner ring 433. The outer ring 431 and the inner ring 433 are concentrically arranged and connected by the connecting rod 432. The outer ring 431 is embedded into the bottom of the inner wall of the channel 42 of the straight pipe 41 and is fixedly connected to the straight pipe 41 by bolts. The connecting rod 432 connects the outer ring 431 and the inner ring 433 to avoid sealing the bottom of the channel 42. The pressure rod 5 vertically penetrates the inner ring 433 and the inner wall of the inner ring 433 fits against the pressure rod 5. The inner ring 433 restricts the movement trajectory of the pressure rod 5.

[0035] The implementation principle of this application embodiment is as follows:

[0036] The pressure acquisition device at the cementing operation site, through the cooperation of the sealing mechanism 3 and the connecting pipe assembly 4, realizes the automatic sealing and pressure acquisition functions of the pressure acquisition end 2 of the three-way pipe 1. When the connecting pipe assembly 4 is not installed, the pressure inside the three-way pipe 1 acts on the sealing ball 34, pushing it upward. The sealing ball 34 moves upward in the limiting cavity 33 and seals the through hole between the upper shell 32 and the lower shell 31, thereby automatically sealing the pressure acquisition end 2 and preventing well fluid leakage.

[0037] After the connecting pipe assembly 4 is installed, the pressure rod 5 extends downward and abuts against the sealing ball 34, restricting its upward movement. This allows the pressure inside the tee pipe 1 to be transmitted to the pressure sensor 6 through the limiting cavity 33 and the channel 42, enabling real-time acquisition of pressure data. The limiting ring 43 guides and restricts the movement trajectory of the pressure rod 5 through the inner ring 433, ensuring its smooth and accurate movement. Each connection is equipped with a sealing ring to ensure the sealing of the entire pressure transmission channel, thereby improving measurement accuracy and reliability.

[0038] Example 2: A pressure acquisition device for cementing operations, referring to... Figure 4 The telescopic rod assembly 45 includes a threaded tube 451, a knob 452, a push block 453, a movable rod 454, a fixing ring 455, a pin 456, and a socket 457. The outer wall of the threaded tube 451 is threadedly connected to the knob 452. The push block 453 is fixed inside the knob 452 and is embedded inside the threaded tube 451. One end of the movable rod 454 is connected to the push block 453, and the other end of the movable rod 454 is rotatably connected to the connecting rod 44 through a rotating shaft. A fixing ring 455 is provided on the outer wall of the knob 452 near the straight tube 41. The threaded tube 451 is provided on the outer wall of the straight tube 41. A socket 457 corresponding to the fixing ring 455 is opened on the outer wall of the straight tube 41. The pin 456 passes through the fixing ring 455 and is inserted into the socket 457.

[0039] The movable rod 454 and the push block 453 are connected by a bearing, and the inner and outer walls of the bearing are fixed to the movable rod 454 and the push block 453 respectively, so as to prevent the movable rod 454 from rotating when the push block 453 rotates, and to drive the movable rod 454 to move synchronously when the push block 453 moves.

[0040] The insertion hole 457 is circumferentially opened on the outside of the threaded tube 451, and the fixing ring 455 has a through hole for the pin 456 to pass through, so that the pin 456 passes through the fixing ring 455 and is inserted into the insertion hole 457, which restricts the rotation of the knob 452, thereby restricting the upward movement of the pressure rod 5. The bottom end of the pressure rod 5 abuts against the sealing ball 34, so that the sealing ball 34 cannot move upward to seal the space between the upper shell 32 and the channel 42.

[0041] Since the downward pressure distance of the pressure rod 5 on the sealing ball 34 is allowed to have a certain error, the through hole of the fixing ring 455 can be rotated to align with the insertion hole 457, so that the pin 456 can pass through the fixing ring 455 and be inserted into the insertion hole 457.

[0042] The movable rod 454 is set horizontally, and the outer wall of the movable rod 454 is in contact with the straight tube 41. A sealing ring is provided between the straight tube 41 and the movable rod 454. The connecting rod 44 is inclined downward from the outside to the inside. When the movable rod 454 moves inward, it pushes the pressure rod 5 downward through the connecting rod 44. When the movable rod 454 moves outward, it pulls the pressure rod 5 upward through the connecting rod 44.

[0043] Based on Example 1, this embodiment uses the telescopic rod assembly 45 to achieve adjustable and fixed positions of the pressure rod 5, further ensuring the stability of pressure acquisition. The core principle is as follows:

[0044] Rotating the knob 452 causes the push block 453 to move, which in turn causes the movable rod 454 to move horizontally inward or outward. The movable rod 454 drives the pressure rod 5 to move up and down through the connecting rod 44, thereby pressing or releasing the blocking ball 34.

[0045] When pressure needs to be collected, rotate the knob 452 to move the movable rod 454 inward, push the pressure rod 5 down to press down the sealing ball 34, open the pressure channel, and then insert the pin 456 into the fixing ring 455 and the insertion hole 457 to lock the position of the knob 452 to prevent it from rotating back, ensuring that the pressure rod 5 remains in the pressed state, and the pressure sensor 6 can stably collect pressure data.

[0046] When disassembly or collection needs to be stopped, pull out the pin 456, rotate the knob 452 in the opposite direction, and the movable rod 454 moves outward. Through the connecting rod 44, the pressure rod 5 is pulled upward, releasing the pressure on the plugging ball 34. Under the action of well pressure, the plugging ball 34 automatically moves upward to block the channel, realizing a fast and safe plugging function.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure acquisition device for cementing operations, characterized in that: It includes a three-way pipe (1), a pressure acquisition end (2), a sealing mechanism (3), a connecting pipe assembly (4), a pressure rod (5), and a pressure sensor (6). The sealing mechanism (3) is located at the pressure acquisition end (2) of the three-way pipe (1). The connecting pipe assembly (4) is installed on the top of the sealing mechanism (3), and the pressure sensor (6) is installed on the top of the connecting pipe assembly (4). The sealing mechanism (3) includes a lower shell (31), an upper shell (32), a limiting cavity (33), and a sealing ball (34). The top edge of the lower shell (31) is fixedly connected to the upper shell (32). A limiting cavity (33) is formed between the lower shell (31) and the upper shell (32). The sealing ball (34) is disposed in the limiting cavity (33). The lower shell (31) is connected to the pressure acquisition end (2) of the three-way pipe (1). The top of the upper shell (32) is connected to the connecting pipe assembly (4). The connecting pipe assembly (4), the limiting cavity (33), and the pressure acquisition end (2) of the three-way pipe (1) are interconnected. A pressure rod (5) is provided at the bottom of the inner part of the connecting pipe assembly (4).

2. The cementing operation site pressure acquisition device according to claim 1, characterized in that: The inner diameters of the through holes at the bottom of the lower shell (31) and the top of the upper shell (32) are both smaller than the diameter of the sealing ball (34).

3. The cementing operation site pressure acquisition device according to claim 1, characterized in that: The connecting pipe assembly (4) includes a straight pipe (41), a channel (42), a limiting ring (43), a connecting rod (44), and a telescopic rod assembly (45). The straight pipe (41) has a channel (42) in its inner middle. The bottom of the inner wall of the channel (42) is fixed with a limiting ring (43). The pressure rod (5) passes vertically through the limiting ring (43). The top end of the pressure rod (5) is rotatably connected to one end of the connecting rod (44) through a rotating shaft. The other end of the connecting rod (44) is rotatably connected to the telescopic rod assembly (45) through a rotating shaft. The telescopic rod assembly (45) is located on the side of the straight pipe (41). The bottom edge of the straight pipe (41) is threaded to the upper shell (32). The top end of the straight pipe (41) is fixedly connected to the pressure sensor (6).

4. The cementing operation site pressure acquisition device according to claim 3, characterized in that: The telescopic rod assembly (45) includes a threaded tube (451), a knob (452), a push block (453), a movable rod (454), a retaining ring (455), a pin (456), and a socket (457). The outer wall of the threaded tube (451) is threadedly connected to the knob (452). The push block (453) is fixed inside the knob (452), and the push block (453) is embedded inside the threaded tube (451). One end of the movable rod (454) The other end of the movable rod (454) is connected to the push block (453) and rotated to the connecting rod (44) via a rotating shaft. A fixing ring (455) is provided on the outer wall of the knob (452) near the straight tube (41). The threaded tube (451) is provided on the outer wall of the straight tube (41). The outer wall of the straight tube (41) is provided with a socket (457) corresponding to the fixing ring (455). The pin (456) passes through the fixing ring (455) and is inserted into the socket (457).

5. A cementing operation site pressure acquisition device according to claim 4, characterized in that: The movable rod (454) is arranged in a horizontal direction.

6. A cementing operation site pressure acquisition device according to claim 3, characterized in that: The limiting ring (43) includes an outer ring (431), a connecting rod (432) and an inner ring (433). The outer ring (431) and the inner ring (433) are concentrically arranged and connected by the connecting rod (432). The outer ring (431) is embedded into the bottom end of the inner wall of the channel (42) of the straight pipe (41) and is fixedly connected to the straight pipe (41) by bolts.

7. A cementing operation site pressure acquisition device according to claim 1, characterized in that: The pressure rod (5) vertically penetrates the inner ring (433), and the inner wall of the inner ring (433) is in contact with the pressure rod (5).

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