Downhole integrated pressure measurement device

Abstract

The utility model discloses an integrated pressure measuring equipment in pit, including two probe pressure gauge body and the supporting cylinder of being used in pairs, and the supporting cylinder is the cylindrical structure of small two ends and big middle, and the middle section of supporting cylinder is connected through the conical transition portion between the two ends of supporting cylinder, and the pressure gauge installation slot is seted up on the side surface of the middle section of supporting cylinder, and the both ends of pressure gauge installation slot all extend to the corresponding conical transition portion outward, and the two probe pressure gauge body is placed in pressure gauge installation slot, the measuring end of two probe pressure gauge body is located one side of pressure gauge installation slot, and the measuring end one side forms the measuring internal pressure probe of oil jacket annular space pressure, and the other side downwardly explores into the inside pressure measuring external pressure probe of the inside of the supporting cylinder, satisfies the demand of measuring the pressure of oil pipe internal pressure and oil jacket annular space simultaneously, and can be directly connected on the pipe coupling, and the installation is convenient.

Description

Technical Field

[0001] This utility model relates to an integrated downhole pressure measurement device. Background Technology

[0002] Downhole pressure testing of tubing is conducted to determine the fluid flow patterns inside and outside the tubing, as well as the integrity of the wellbore structure, in order to prevent tubing rupture and leakage. Downhole pressure testing of tubing typically uses a tubing pressure gauge, which usually consists of a pressure sensor and a measuring circuit. The gauge converts the measured internal pressure of the tubing into an electrical signal, which is then transmitted to the surface via a cable. The use of a tubing pressure gauge facilitates pressure data monitoring and recording by surface personnel.

[0003] The traditional downhole pressure testing equipment used today involves placing a tubing pressure gauge inside a pressure testing cylinder, which is then lowered into the well along with the tubing during oil well operations.

[0004] However, this traditional pressure measuring device has some problems: 1. Traditional tubing pressure gauges are usually single-probe and can only measure the pressure at one point. Since the pressure measuring cylinder is usually welded and installed outside the tubing, the tubing pressure gauge can only test the pressure from the outside of the tubing to the inside of the casing, and cannot simultaneously test the pressure inside the tubing.

[0005] 2. Traditional pressure gauges also have some problems with poor sealing performance, which can easily lead to leakage.

[0006] 3. In traditional downhole pressure gauges using welding technology, if there is strong downhole vibration and frequent impacts between the support and casing, the welded parts are easily cracked, leading to damage and failure of the pressure gauge. In highly corrosive downhole environments, the welded parts are easily corroded and detached, resulting in downhole failures or even requiring well workover operations. Utility Model Content

[0007] To address the aforementioned problems, the purpose of this invention is to provide an integrated downhole pressure measurement device that can solve the problem of poor reliability of the support tube under harsh downhole conditions in oil and gas wells.

[0008] The technical solution for realizing this utility model is as follows:

[0009] The downhole integrated pressure measuring device includes a dual-probe pressure gauge body and a matching support. The support is a cylindrical structure that is smaller at both ends and larger in the middle. The middle section of the support is connected to the two ends of the support through a conical transition section. A pressure gauge mounting slot is opened on the side of the middle section of the support. Both ends of the pressure gauge mounting slot extend outward to the corresponding conical transition section. The dual-probe pressure gauge body is placed in the pressure gauge mounting slot. The measuring end of the dual-probe pressure gauge body is located on one side of the pressure gauge mounting slot. One side of the measuring end forms an internal pressure probe for measuring the annular pressure of the oil casing, and the other side extends downward into the support to measure the internal pressure of the oil pipe.

[0010] The pressure measuring inner probe and pressure measuring outer probe of the dual-probe pressure gauge body are placed at one end of the pressure gauge mounting slot and connected to the pressure gauge body via an adapter.

[0011] The external pressure probe has a first opening on its straight section, and the internal pressure probe has a second opening on its protrusion.

[0012] The pressure gauge has protruding bosses on all sides along its length within the mounting slot.

[0013] The pressure gauge body is placed between two protrusions, which are connected by a clamp.

[0014] Both ends of the support are provided with threads to form threaded portions.

[0015] The internal pressure probe is equipped with a secondary sealing ring on its bottom surface.

[0016] By adopting the above technical solution, this application is easy to install and can simultaneously detect the internal pressure of the oil pipe and the annular pressure of the oil casing; by combining the matching oil pipe support with dual pressure gauges (simultaneously measuring internal and external pressure), the requirement for simultaneous detection of dual pressures can be achieved.

[0017] The dual-probe pressure gauge body is installed in the slot to avoid direct impact; for oil and gas wells with different corrosiveness such as H2S, CO2, and chloride ions, the materials of the integrated support and pressure gauge can be selected from corrosion-resistant high-strength metals such as martensitic stainless steel, duplex stainless steel, and nickel-based alloys. The integrated processing of the support and pressure gauge not only meets the corrosion resistance requirements of multiple scenarios, but also reasonably controls costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the grooved structure for installing the pressure gauge of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal pressure measuring probe structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the internal pressure measuring probe of this utility model;

[0022] Figure 5 This is a schematic cross-sectional view of the structural adapter of this utility model;

[0023] In the attached diagram, 1 is the body of the dual-probe pressure gauge, 2 is the support cylinder, 3 is the conical transition section, 4 is the pressure gauge mounting slot, 5 is the measuring end, 6 is the internal pressure probe, 7 is the external pressure probe, 9 is the adapter, 10 is the first opening, 11 is the second opening, 12 is the boss, 13 is the clamp, 14 is the threaded part, and 15 is the secondary sealing ring. Detailed Implementation

[0024] The downhole integrated pressure measuring device includes a dual-probe pressure gauge body 1 and a matching support cylinder 2. The support cylinder has a cylindrical structure that is smaller at both ends and larger in the middle. The middle section of the support cylinder is connected to the two ends of the support cylinder through a conical transition part 3. A pressure gauge mounting slot 4 is opened on the side of the middle section of the support cylinder. Both ends of the pressure gauge mounting slot extend outward to the corresponding conical transition part. The dual-probe pressure gauge body is placed in the pressure gauge mounting slot. The measuring end 5 of the dual-probe pressure gauge body is located on one side of the pressure gauge mounting slot. One side of the measuring end forms an internal pressure probe 6 for measuring the annular pressure of the oil casing, and the other side extends downward into the support cylinder to measure the internal pressure of the oil pipe for measuring the external pressure. A dual-probe pressure gauge is installed in the mounting slot on the side of the support. One end of the dual-probe pressure gauge is flat to measure the pressure of the annulus of the oil casing, and the other end extends downward into the support to measure the pressure inside the oil pipe. The two ends are connected by an adapter to form an integrated pressure gauge. If only a single pressure needs to be measured, the other probe can be removed for direct use. Furthermore, due to the use of an integrated support, it has high mechanical strength and is impact-resistant. At the same time, the dual-probe pressure gauge body is protected by being installed in the mounting slot and will not be directly impacted. For oil and gas wells with different corrosiveness (H2S, CO2, chloride ions, etc.), the integrated support and pressure gauge are manufactured by selecting corresponding corrosion-resistant high-strength metal materials (such as martensitic stainless steel, duplex stainless steel, nickel-based alloys, etc.), which not only meets the corrosion resistance requirements of different scenarios, but also keeps the cost within a reasonable range.

[0025] The pressure measuring inner probe and pressure measuring outer probe of the dual-probe pressure gauge body are placed at one end of the pressure gauge mounting slot and connected to the pressure gauge body via an adapter 8.

[0026] The external pressure probe has a first opening 10 on its straight section, and the internal pressure probe has a second opening 11 on its protrusion. The direct opening on the straight section of the probe is used to transmit pressure to the sensor for measurement. The groove surface of the support sleeve is designed with a second protrusion, through which the probe for measuring the internal pressure of the oil pipe extends to test the pressure.

[0027] The pressure gauge is provided with protruding bosses 12 on the sides along its length in the mounting slot. The two rows of long protruding bosses in the pressure mounting slot are used to install the subsequent clamps. The pressure gauge is pressed onto the mounting slot of the support cylinder by the clamps section by section.

[0028] The pressure gauge body is positioned between two protrusions, which are connected by a clamping ring 13. The pressure gauge is fixed to the groove surface by screws installed on the probe and subsequent clamping rings pressing against the support cylinder.

[0029] Both ends of the support are provided with threaded portions 14. The threads at both ends of the support can be connected to standard couplings for easy subsequent installation.

[0030] The internal pressure probe is equipped with a secondary sealing ring 15 on its bottom surface. Two sealing rings are installed on the probe for sealing. The downward-facing pressure probe of the oil pipe pressure measuring head is equipped with two sealing rings for sealing. A hole is made at the top of the pressure measuring head, and screws are used to install and position it in the mounting groove. The secondary sealing rings improve sealing performance and prevent leakage.

Claims

1. An integrated downhole pressure measurement device, characterized in that, The device includes a dual-probe pressure gauge body and a matching support. The support is a cylindrical structure that is smaller at both ends and larger in the middle. The middle section of the support is connected to the two ends of the support through a tapered transition section. A pressure gauge mounting slot is opened on the side of the middle section of the support. Both ends of the pressure gauge mounting slot extend outward to the corresponding tapered transition section. The dual-probe pressure gauge body is placed in the pressure gauge mounting slot. The measuring end of the dual-probe pressure gauge body is located on one side of the pressure gauge mounting slot. One side of the measuring end forms an internal pressure probe for measuring the annular pressure of the oil sleeve, and the other side extends downward into the support to measure the internal pressure of the oil pipe.

2. The integrated downhole pressure measuring device according to claim 1, characterized in that, The pressure measuring inner probe and pressure measuring outer probe of the dual-probe pressure gauge body are placed at one end of the pressure gauge mounting slot and connected to the pressure gauge body via an adapter.

3. The integrated downhole pressure measuring device according to claim 1, characterized in that, The external pressure probe has a first opening on its straight section, and the internal pressure probe has a second opening on its protrusion.

4. The downhole integrated pressure measuring device according to claim 1, characterized in that, The pressure gauge has protruding bosses on all sides along its length within the mounting slot.

5. The integrated downhole pressure measuring device according to claim 4, characterized in that, The pressure gauge body is placed between two protrusions, which are connected by a clamp.

6. The integrated downhole pressure measuring device according to claim 1, characterized in that, Both ends of the support are provided with threads to form threaded portions.

7. The downhole integrated pressure measuring device according to claim 1, characterized in that, The internal pressure probe is equipped with a secondary sealing ring on its bottom surface.

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