Annular pressure measuring device

Abstract

The utility model relates to the technical field of oil and gas field operation tools, and discloses an annulus pressure measuring device which comprises a fixing frame, a winch and a pressure sensor, the winch is fixedly installed on the top of the fixing frame, a lifting rope is wound on the winch, a weight attaching plate is fixedly arranged at the lower end of the lifting rope, and the pressure sensor is arranged on the weight attaching plate. Scale marks are arranged on the surface of the lifting rope, the pressure sensor is fixedly installed on the lower surface of the load-bearing plate, a protection mechanism covering the pressure sensor is arranged on the lower surface of the load-bearing plate, the load-bearing plate is of a hollow structure, and a jacking mechanism extending towards the periphery is arranged in the load-bearing plate. And a wireless controller and a storage battery are fixedly mounted in the weight attaching plate. The device is small in size, convenient to measure and use and capable of accurately measuring the annulus pressure in a well, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas field operation tools, in particular to an annular space pressure measuring device. Background Art

[0002] During the drilling and completion process, in order to separate different geological strata and prevent the wellbore from collapsing due to different formation pressures, one or more layers of casing cementing are required. Each layer of casing is cemented with cement, and the annular space between each layer of casing is filled with annular protection fluid. The pressure of the annular space between each layer of casing is the annular pressure.

[0003] At present, when detecting the annular space pressure inside the well, an annular space pressure measuring device is needed, among which the disclosure (announcement) number is: CN204225872U, a built-in annular space bottom hole pressure measuring device, which includes an outer cylinder, a core shaft, a pressure transmission wire plug and a measuring instrument assembly; the measuring instrument assembly includes a power supply, a pressure sensor and a data storage device; an instrument compartment is provided in the axial interior of the core shaft, an annular protrusion is provided on the upper outer side of the core shaft, and a flow hole is provided in the axial direction of the annular protrusion; at least one first hole is provided in the radial direction of the annular protrusion, and a measuring instrument assembly is installed in the instrument compartment, and the core shaft docking tube is connected to the lower end of the core shaft; a pressure transmission wire plug is fixedly installed on the side wall of the outer cylinder, and the center hole of the pressure transmission wire plug is connected to the first hole.

[0004] In the above-mentioned solution, an outer cylinder is inserted into the well, allowing the pressure sensor to measure the annular pressure within the well. However, in actual use, it was found that the outer cylinder is long and bulky, making measurement time-consuming and labor-intensive. In addition, the pressure sensor's depth within the well is difficult to observe, resulting in low accuracy in annular pressure measurement. To address this issue, an annular pressure measurement device is proposed. Utility Model Content

[0005] The purpose of the utility model is to solve the problems raised in the background technology and to provide an annular space pressure measuring device.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A annular space pressure measuring device includes a fixed frame, a winch and a pressure sensor, the winch is fixedly installed on the top of the fixed frame, a lifting rope is wound on the winch, the lower end of the lifting rope is fixedly provided with an auxiliary weight plate, the surface of the lifting rope is provided with scale lines, the pressure sensor is fixedly installed on the lower surface of the auxiliary weight plate, the lower surface of the auxiliary weight plate is provided with a protective mechanism covering the pressure sensor, the auxiliary weight plate adopts a hollow structure, and the interior of the auxiliary weight plate is provided with a tightening mechanism extending to all sides, and the interior of the auxiliary weight plate is fixedly installed with a wireless controller and a battery.

[0008] Preferably, the protection mechanism includes a protective cover and a first electric cylinder, the protective cover is located outside the pressure sensor, the first electric cylinder is fixedly arranged on both sides of the protective cover, and the base of the first electric cylinder is fixedly connected to the lower surface of the attached weight plate.

[0009] Preferably, the protective cover is a transparent acrylic cover.

[0010] Preferably, the tightening mechanism includes a tightening rod and a second electric cylinder, the tightening rod is movably inserted into the side wall of the attached weight plate, the second electric cylinder is fixedly installed inside the attached weight plate, and the movable end of the second electric cylinder is fixedly connected to one end of the tightening rod.

[0011] Preferably, the end of the tightening rod located outside the weight-attached plate is provided with a pointed end structure.

[0012] Preferably, the lower ends of the four supporting feet at the bottom of the fixing frame are all configured with pointed structures.

[0013] Preferably, the pressure sensor, the protection mechanism and the tightening mechanism are all connected to the wireless controller signal.

[0014] Compared with the prior art, the present invention provides an annular pressure measuring device with the following beneficial effects:

[0015] 1. The annular pressure measuring device is equipped with a fixed frame, a hoist, a lifting rope and an attached weight plate. The fixed frame is first fixed across the wellhead, and then the hoist is controlled to work. The hoist releases the lifting rope to make the attached weight plate move down in the well. At the same time, the pressure sensor on the lower surface of the attached weight plate also moves down in the well. When it moves down to a certain depth, the scale line can be used to know the depth of the pressure sensor in the well, so that the annular pressure in the well can be accurately measured. The value detected by the pressure sensor is sent to the receiving end of the construction personnel through the wireless controller, so that the construction personnel can know the detection value.

[0016] 2. This annular pressure measuring device uses a protective cover and a first electric cylinder installed on the lower surface of the attached weight plate. Due to the complex environment in the well, the first electric cylinder is controlled to retract so that the protective cover covers the pressure sensor to protect the pressure sensor. After the pressure sensor moves down to a certain depth, the protective cover is moved down by the first electric cylinder to expose the pressure sensor.

[0017] 3. This annular pressure measuring device utilizes a jacking rod and a second electric cylinder. When the weight plate and pressure sensor shake within the well, the second electric cylinder is controlled to extend, causing the jacking rod to extend from within the weight plate, allowing the end of the jacking rod to contact the wellbore inner wall, thereby ensuring the weight plate and pressure sensor are stably positioned within the wellbore.

[0018] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model is small in size, convenient to use for measurement, and can accurately measure the annular pressure in the well, thereby improving the efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an annular space pressure measuring device proposed by the utility model.

[0020] Figure 2 for Figure 1 A magnified view of the structure of part A in the middle.

[0021] Figure 3 for Figure 1 Top view of the heavy plate.

[0022] In the figure: 1. Fixed frame; 2. Winch; 3. Pressure sensor; 4. Lifting rope; 5. Scale line; 6. Attached weight plate; 7. Wireless controller; 8. Battery; 9. Protective cover; 10. First electric cylinder; 11. Tightening rod; 12. Second electric cylinder. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] Reference Figure 1-3The pressure sensor 3 is fixed on the upper part of the wellbore 1 and the lower part of the wellbore 2, and the pressure sensor 3 is fixed on the upper part of the wellbore 1.

[0026] During measurement, the fixed frame 1 is first fixed across the wellhead, and then the winch 2 is controlled to work. The winch 2 releases the lifting rope 4 to make the attached weight plate 6 move down in the well. At the same time, the pressure sensor 3 on the lower surface of the attached weight plate 6 also moves down in the well. When it moves down to a certain depth, the depth of the pressure sensor 3 in the well can be known through the scale line 5, so that the annular space pressure in the well can be accurately measured. The value detected by the pressure sensor 3 is sent to the receiving end of the construction personnel through the wireless controller 7, so that the construction personnel can know the detection value.

[0027] Reference Figure 1-2 The protection mechanism includes a protective cover 9 and a first electric cylinder 10. The protective cover 9 is located outside the pressure sensor 3. The first electric cylinder 10 is fixedly arranged on both sides of the protective cover 9, and the base of the first electric cylinder 10 is fixedly connected to the lower surface of the attached weight plate 6. The protective cover 9 adopts an acrylic transparent cover. The acrylic material is not only strong in use, but also has good transparency. Since the environment in the well is relatively complex, the protective cover 9 covers the pressure sensor 3 by controlling the first electric cylinder 10 to retract, so that the pressure sensor 3 can be protected. After the pressure sensor 3 moves down to a certain depth, the protective cover 9 is moved down by the first electric cylinder 10 to expose the pressure sensor 3 for detection.

[0028] Reference Figure 1 and 3The tightening mechanism includes a tightening rod 11 and a second electric cylinder 12. The tightening rod 11 is movably inserted into the side wall of the attached weight plate 6. The second electric cylinder 12 is fixedly installed inside the attached weight plate 6, and the movable end of the second electric cylinder 12 is fixedly connected to one end of the tightening rod 11. The end of the tightening rod 11 located outside the attached weight plate 6 adopts a pointed structure. Since the attached weight plate 6 and the pressure sensor 3 will shake in the well, the second electric cylinder 12 is controlled to extend so that the tightening rod 11 extends from the inside of the attached weight plate 6, so that the end of the tightening rod 11 contacts the inner wall of the well, so that the attached weight plate 6 and the pressure sensor 3 can be stably set in the well, thereby increasing the stability of the detection.

[0029] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An annular space pressure measuring device, comprising a fixed frame (1), a hoist (2) and a pressure sensor (3), characterized in that: The hoist (2) is fixedly mounted on the top of the fixing frame (1), a lifting rope (4) is wound on the hoist (2), a weight-attached plate (6) is fixedly mounted on the lower end of the lifting rope (4), a scale line (5) is provided on the surface of the lifting rope (4), the pressure sensor (3) is fixedly mounted on the lower surface of the weight-attached plate (6), the lower surface of the weight-attached plate (6) is provided with a protective mechanism for covering the pressure sensor (3), the weight-attached plate (6) adopts a hollow structure, and a tightening mechanism extending in all directions is provided inside the weight-attached plate (6), and a wireless controller (7) and a battery (8) are fixedly mounted inside the weight-attached plate (6).

2. The annular space pressure measuring device according to claim 1, characterized in that: The protective mechanism comprises a protective cover (9) and a first electric cylinder (10), wherein the protective cover (9) is located outside the pressure sensor (3), the first electric cylinder (10) is fixedly arranged on both sides of the protective cover (9), and the base of the first electric cylinder (10) is fixedly connected to the lower surface of the attached weight plate (6).

3. The annular space pressure measuring device according to claim 2, characterized in that: The protective cover (9) is made of a transparent acrylic cover.

4. The annular space pressure measuring device according to claim 1, characterized in that: The tightening mechanism comprises a tightening rod (11) and a second electric cylinder (12), wherein the tightening rod (11) is movably plugged into a side wall of the attached weight plate (6), and the second electric cylinder (12) is fixedly installed inside the attached weight plate (6), and the movable end of the second electric cylinder (12) is fixedly connected to one end of the tightening rod (11).

5. The annular space pressure measuring device according to claim 4, characterized in that: One end of the tightening rod (11) located outside the weight-attached plate (6) is provided with a pointed end structure.

6. The annular space pressure measuring device according to claim 1, characterized in that: The lower ends of the four supporting feet at the bottom of the fixing frame (1) are all provided with a pointed structure.

7. The annular space pressure measuring device according to claim 1, characterized in that: The pressure sensor (3), the protection mechanism and the tightening mechanism are all connected to the wireless controller (7) via signals.

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