Testing equipment for bridge plug pumping

Abstract

The utility model discloses bridge plug pumping test equipment which is used for simulating the bridge plug pumping process and evaluating the equivalent displacement of a pumping ring so as to meet the development requirement of the pumping ring. The device comprises a pump body, a liquid storage tank, a pumping pipe and a flow meter, the liquid storage tank is communicated with the two ends of the pumping pipe, the pump body and the flow meter are arranged on the pumping pipe, and the pump body is used for controlling fluid in the liquid storage tank to flow in the pumping pipe; a test tube is arranged on the pumping tube, the test tube is used for accommodating a test bridge plug, a resistance measurer is arranged in the test tube, and the resistance measurer is connected with the test bridge plug so as to measure the resistance of the test bridge plug under fluid; a detachable pumping ring is arranged in the middle of the test bridge plug, and when the pumping ring is used, the skirt edge of the pumping ring can be opened under the impact of fluid.

Description

Technical Field

[0001] This application relates to the technical field of oil and gas development tests, and particularly to a test device for bridge plug pumping. Background Art

[0002] At present, staged fracturing of horizontal wells is the main means for the development of unconventional oil and gas resources. As a downhole isolation tool, the bridge plug can prevent the cross-flow of fracturing fluid between sections and is an essential downhole tool in staged fracturing construction.

[0003] In on-site construction, the displacement required for bridge plugs of different diameters is different. Generally, the larger the diameter of the bridge plug, the smaller the required displacement. However, in complex downhole conditions such as casing deformation on site, large-diameter bridge plugs cannot be used, and only small-diameter bridge plugs can pass. During the lowering process of small-diameter bridge plugs, there are situations where the pumping speed is low and the pumping displacement requirement is high, resulting in low pumping efficiency and high pumping cost. Therefore, one way to solve the cost problem is to pump small-diameter bridge plugs with a small displacement. In the prior art, the pumping ring technology has emerged. The pumping ring is assembled on a small-diameter bridge plug. When the pumping ring expands, it can be equivalent to a large-diameter bridge plug. In on-site applications, the pumping ring can achieve good results. With the pumping ring, the required displacement during pumping is small, and the pumping speed is relatively fast.

[0004] However, during on-site construction, it is impossible to know at what displacement the pumping ring starts to take effect and impossible to know the quantitative description after the pumping ring reaches the best effect. Based on this, a test device and test method for simulating the bridge plug pumping condition in a laboratory are needed to evaluate the pumping ring to meet the development requirements of the pumping ring, so as to achieve the purpose of guiding on-site construction operations. Summary of the Utility Model

[0005] To solve the above technical problems, this application provides a test device for bridge plug pumping, which can simulate the bridge plug pumping process and evaluate the equivalent displacement of the pumping ring, so as to meet the development requirements of the pumping ring.

[0006] A test device for bridge plug pumping provided by this application includes:

[0007] A pump body, a liquid storage tank, a pumping pipe, and a flow meter;

[0008] The liquid storage tank is communicated with both ends of the pumping pipe. The pump body and the flow meter are respectively arranged on the pumping pipe. The pump body is used to control the flow of the fluid in the liquid storage tank in the pumping pipe.

[0009] A test pipe is provided on the pumping pipe. The test pipe is used to accommodate a test bridge plug. A resistance measurer is provided inside the test pipe. The resistance measurer is connected to the test bridge plug to measure the resistance of the test bridge plug under fluid.

[0010] A detachable pumping ring is provided in the middle of the test bridge plug. When the pumping ring is used, the skirt of the pumping ring can be opened by the impact of the fluid.

[0011] Optionally, the resistance measurer is a tensiometer. A cross bar is provided at the front end of the test pipe. One end of the tensiometer is fixed on the cross bar, and the other end is connected to the test bridge plug.

[0012] Optionally, the resistance measurer is a pressure sensor. A fixing frame is provided at the rear end of the test pipe. The pressure sensor is arranged at the central position of the fixing frame, so that the test bridge plug is embedded in the fixing frame and abuts against the pressure sensor.

[0013] Optionally, the middle part of the test pipe is made of a transparent material.

[0014] Optionally, a protection pipe is provided on the pumping pipe. The protection pipe is arranged in parallel with the test pipe. A safety valve is provided on the protection pipe.

[0015] Optionally, a filter screen is provided on the pumping pipe. The filter screen is located between the water return port of the liquid storage tank and the test pipe.

[0016] Optionally, the test pipe and the pumping pipe are fixedly connected by bolts.

[0017] Optionally, a detachable bridge plug tooling is provided on the test bridge plug. The bridge plug tooling is used to increase the diameter of the test bridge plug.

[0018] Optionally, the test equipment further includes a data control system. The data control system is electrically connected to the resistance measurer, the flow meter and the pump body respectively. The data control system is used to collect the values of the resistance measurer and the flow meter, and control the operation of the pump body.

[0019] It can be seen from the above technical solutions that the present application has the following effects:

[0020] This application controls the circulation of fluid in the pumping pipe through a pump body, changes the power of the pump body to achieve the effect of changing the fluid flow rate / discharge, places the test bridge plug in the test pipe inside the pumping pipe and connects it to a resistance measuring device, can simulate the process of the bridge plug being lowered into the well, obtains the equivalent displacement of the test bridge plug through the resistance measuring device and the flow meter, and guides the displacement used during on-site construction based on this equivalent displacement, which plays a guiding role in on-site construction and avoids problems such as poor pumping effect caused by insufficient displacement or waste of resources caused by excessive displacement. In addition, it can simulate the on-site bridge plug pumping process in the laboratory, and guide on-site construction from the evaluation of the pumping effect of the pumping ring in the laboratory, which is convenient for on-site construction to determine the equivalent displacement and the diameter size of the equivalent bridge plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a test device for bridge plug pumping in this application;

[0023] Figure 2 It is a schematic diagram of the cooperation between the test bridge plug and the tensiometer in a test device for bridge plug pumping in this application;

[0024] Figure 3 It is a schematic diagram of the cooperation between the fixing frame and the test bridge plug in a test device for bridge plug pumping in this application;

[0025] Figure 4 It is a schematic diagram of the pressure sensor in a test device for bridge plug pumping in this application;

[0026] Figure 5 It is a schematic diagram of the cooperation between the bridge plug tooling and the test bridge plug in a test device for bridge plug pumping in this application;

[0027] Figure 6 It is a schematic diagram of the cooperation between the bridge plug tooling and the pumping ring in a test device for bridge plug pumping in this application;

[0028] Wherein, pump body 01, liquid storage tank 02, pumping pipe 03, flow meter 04, test pipe 05, test bridge plug 06, pumping ring 07, bridge plug tooling 08, tensiometer 09, cross bar 10, fixing frame 11, pressure sensor 12, protection pipe 13, safety valve 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In the present utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings, and is only used to illustrate the relative positional relationship between each component or component part, and does not particularly limit the specific installation orientation of each component or component part.

[0030] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0031] In addition, the terms "installation", "setting", "provided with", "connection", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can also be internal communication between two devices, components or component parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In addition, the structures, proportions, sizes, etc. drawn in the drawings in this application are only used to cooperate with the content disclosed in the specification for those of ordinary skill in the art to understand and read, and are not used to limit the implementable limiting conditions of this application. Therefore, they do not have technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0033] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

[0034] This application provides a test device for bridge plug pumping, which is used to simulate the bridge plug pumping process and evaluate the equivalent displacement of the pumping ring, so as to meet the development requirements of the pumping ring. The specific implementation process of this application is described as follows.

[0035] Please refer to Figures 1 to 6 , Figure 1 in which the arrow direction is the flow direction of the fluid. A test device for bridge plug pumping provided by this application includes:

[0036] A pump body 01, a liquid storage tank 02, a pumping pipe 03 and a flowmeter 04; the liquid storage tank 02 is communicated with both ends of the pumping pipe 03, the pump body 01 and the flowmeter 04 are respectively arranged on the pumping pipe 03, and the pump body 01 is used to control the flow of the fluid in the liquid storage tank 02 in the pumping pipe 03; a test pipe 05 is arranged on the pumping pipe 03, the test pipe 05 is used to accommodate a test bridge plug 06, a resistance measurer is arranged in the test pipe 05, and the resistance measurer is connected with the test bridge plug 06 to measure the resistance of the test bridge plug 06 under the fluid; a detachable pumping ring 07 is arranged in the middle of the test bridge plug 06, and when the pumping ring 07 is used, the skirt of the pumping ring 07 can be opened by the impact of the fluid.

[0037] The pump body 01 is the power source of the whole system. The pump body 01 is electrically connected with the data control system. The pumping power of the pump body 01 can be controlled through the data control system, so as to change the flow rate of the fluid. The pump body 01 is responsible for providing a stable fluid pressure to drive the fluid (the fluid can be water or simulated well fluid) in the liquid storage tank 02 to flow through the pumping pipe 03. A frequency converter or a speed regulating device can be equipped on the pump body 01 to realize precise adjustment of the flow rate; at the same time, a pressure gauge and a pressure sensor 12 can also be equipped to monitor and adjust the pumping pressure in real time to meet different test requirements.

[0038] The liquid storage tank 02, as a storage and supply container of the fluid, can ensure the continuous supply of the fluid during the test. In actual use, the material of the liquid storage tank 02 is corrosion-resistant and easy to clean and maintain. A liquid level gauge or a liquid level sensor is also arranged on the liquid storage tank 02 to monitor the fluid inventory.

[0039] The pumping pipe 03, as a channel for providing fluid flow, both ends of the pumping pipe 03 are connected with the liquid storage tank 02. The pump body 01 is arranged on the pumping pipe 03 and communicated with the pumping pipe 03. The pump body 01 drives the fluid to circulate along the pumping pipe 03 channel. The pumping pipe 03 is made of high-strength and corrosion-resistant materials to withstand the impact of high-pressure and high-speed fluids.

[0040] The flowmeter 04 is arranged in the pumping pipe 03 to accurately measure the fluid flow rate passing through the pumping pipe 03 and provide key data for evaluating the bridge plug resistance. The flowmeter 04 can adopt an electromagnetic flowmeter, a turbine flowmeter or an ultrasonic flowmeter 04 to adapt to different fluid characteristics and flow ranges. Further, the flowmeter 04 can also be provided with a digital display screen or a data transmission interface for facilitating real-time reading and recording of data. The flowmeter 04 is electrically connected with the data control system through the data transmission interface to facilitate uploading the real-time flow rate to the data control system for analysis.

[0041] The test tube 05 is a pipeline for accommodating and fixing the test bridge plug 06. The test tube 05 is connected to the pumping tube 03, and the connection between the test tube 05 and the pumping tube 03 is detachable, which is convenient for replacing the test bridge plug 06 in the test tube 05. When installing the test bridge plug 06, first separate the test tube 05 from the pumping tube 03, then place the test bridge plug 06 into the test tube 05, fixedly connect it through the end of the test tube 05 and the test bridge plug 06, and finally seal the connection between the test tube 05 and the pumping tube 03. Keep the test bridge plug 06 stationary, and simulate the on-site construction conditions by changing the fluid flow rate and the resistance received by the test bridge plug 06.

[0042] The resistance measuring device is directly connected to the test bridge plug 06 to measure and record the resistance generated by the test bridge plug 06 during fluid flow. The resistance measuring device has high precision and fast response capabilities to capture the resistance change at the moment when the pumping ring 07 on the test bridge plug 06 unfolds. The resistance measuring device is equipped with a data processing unit that can automatically calculate and display the resistance value. In actual use, the resistance measuring device is electrically connected to the data control system and can transmit the real-time obtained resistance value to the data control system for analysis.

[0043] The test bridge plug 06 is a test tool designed to simulate the on-site bridge plug. A pumping ring 07 can be sleeved in the middle of the test bridge plug 06, and the connection between the pumping ring 07 and the test bridge plug is detachable and is installed when a pumping ring test is required. To realize the simulation of the test bridge plug 06 and the on-site bridge plug, test bridge plugs 06 of various sizes can be set, or detachable bridge plug tooling 08 can be set on the test bridge plug 06. The sizes of multiple bridge plug toolings 08 are respectively similar to the sizes of various on-site bridge plugs. During the actual simulation test process, first, the pumping ring 07 is not assembled on the test bridge plug 06. After connecting the test bridge plug 06 with bridge plug toolings 08 of different diameter sizes, simulate the test respectively, and record the test data corresponding to each bridge plug tooling 08 with a diameter size. Then, configure the smallest diameter size bridge plug tooling 08 and the pumping ring 07 on the test bridge plug 06 at the same time for simulation testing, and record the test data at this time. The bridge plug toolings 08 of different diameter sizes are tools designed according to the sizes of the on-site bridge plugs actually used in construction. After the bridge plug tooling 08 and the test bridge plug 06 are matched, they can be equivalent to the corresponding bridge plugs in on-site construction. For example, the common bridge plug sizes in on-site construction are 98mm, 102mm, 106mm, and 110mm. The outer diameter sizes of the bridge plug toolings 08 are the same as the above sizes. Simulate the test for the 98mm size bridge plug tooling, 102mm size bridge plug tooling, 106mm size bridge plug tooling, and 110mm size bridge plug tooling respectively. After obtaining the test data of each group, assemble the 98mm size bridge plug tooling and the pumping ring 07 on the test bridge plug 06 at the same time for simulation testing to obtain the test data at this time.

[0044] Alternatively, test bridge plugs 06 with different direct dimensions are respectively subjected to simulation tests, and the test data corresponding to each test bridge plug 06 with a diameter dimension are respectively recorded. Then, the pumping ring 07 is assembled to the test bridge plug 06 with the smallest diameter dimension for simulation testing, and the test data at this time are recorded.

[0045] The pumping ring 07 can open under fluid impact to simulate the deployment behavior of the bridge plug during downhole pumping; the material of the pumping ring 07 can be natural rubber material or H rubber material.

[0046] In an alternative embodiment, the resistance measurer is a tensiometer 09. A cross bar 10 is provided at the front end of the test tube 05. One end of the tensiometer 09 is fixed to the cross bar 10, and the other end is connected to the test bridge plug 06. In this embodiment, one end of the tensiometer 09 is supported and fixed by the cross bar 10 to ensure that the tensiometer 09 remains stable during the measurement process. One end of the tensiometer 09 is firmly fixed to the cross bar 10 by means of a clamp, screw or other fastening device. The other end is connected to the test bridge plug 06 through a connecting member such as a hook or a rope. The connecting member is strong enough to withstand the maximum tensile force that may be generated during the test. During the measurement process, when the pump body 01 drives the fluid to enter the test tube 05 through the pumping tube 03 and pushes the test bridge plug 06 to move, the resistance received by the bridge plug is converted into a tensile force on the tensiometer 09, and the spring or strain gauge inside the tensiometer 09 will deform accordingly. This deformation is converted into a readable resistance value by electronic or mechanical means.

[0047] In another alternative embodiment, the resistance measurer is a pressure sensor 12. A fixing frame 11 is provided at the rear end of the test tube 05. The pressure sensor 12 is arranged at the central position of the fixing frame 11, so that the test bridge plug 06 is embedded in the fixing frame 11 and abuts against the pressure sensor 12. In this embodiment, the fixing frame 11 is arranged at the rear end of the test tube 05 along the fluid flow direction. The fixing frame 11 can stably support the test bridge plug 06 and allow the bridge plug to have a certain movement space when being subjected to the fluid thrust.

[0048] The pressure sensor 12 is installed at the central position of the fixing frame 11, usually fixed to the fixing frame 11 by bolts or other fastening means. The sensing surface of the sensor is kept parallel and in close contact with the contact surface of the test bridge plug 06 to ensure accurate measurement of the pressure received by the bridge plug. During the measurement process, when the fluid pushes the test bridge plug 06 towards the fixing frame 11, the end of the bridge plug will press against the sensing surface of the pressure sensor 12, and the resistance received by the bridge plug is converted into a pressure on the pressure sensor 12. The sensitive element (such as a piezoresistive element, a capacitive diaphragm, etc.) inside the pressure sensor 12 will deform or the electrical parameters will change accordingly, and this change is converted into a readable resistance value through an electronic circuit.

[0049] In an alternative embodiment, the middle part of the test tube 05 is made of a transparent material. In this embodiment, the selection of the transparent material ensures that the fluid movement state inside the test tube 05, the opening of the test bridge plug 06 and the pumping ring 07 can be clearly observed during the test. Common transparent materials include glass, advanced polymers such as polymethyl methacrylate (PMMA, commonly known as acrylic), polycarbonate (PC), etc.

[0050] In an alternative embodiment, a protective tube 13 is provided on the pumping tube 03. The two ends of the protective tube 13 are respectively communicated with the pumping tube 03. The protective tube 13 is arranged in parallel with the test tube 05, and a safety valve 14 is provided on the protective tube 13. The two ends of the protective tube 13 are firmly connected to the pumping tube 03 through special connectors or flanges to ensure no leakage between the two. The test tube 05 is the first channel of the pumping tube 03, and the protective tube 13 is the second channel in the pumping tube 03. That is, when the protective tube 13 is closed, the pumping tube 03 is communicated with the test tube 05. When the protective tube 13 is opened, a part of the fluid in the pumping tube 03 flows through the test tube 05, and the other part flows through the protective tube 13. By installing the safety valve 14 on the protective tube 13, it can be set that the valve will automatically or manually open under specific conditions (such as too high pressure, abnormal flow rate, etc.) to release the internal pressure, playing a protective role for the pumping tube 03. The position of the safety valve 14 is usually carefully calculated to ensure a rapid response in case of an emergency.

[0051] In an alternative embodiment, a filter screen is provided on the pumping tube 03, and the filter screen is located between the water return port of the liquid storage tank 02 and the test tube 05. The filter screen is installed on the section of the pumping tube 03 between the water return port of the liquid storage tank 02 and the test tube 05, so that impurities, particulate matters or suspended matters in the fluid can be filtered out. The aperture size of the filter screen is determined according to actual requirements, which can effectively intercept impurities without overly affecting the smoothness of fluid flow. The filter screen material is usually corrosion-resistant and easy-to-clean stainless steel or nylon mesh, etc.

[0052] In an alternative embodiment, the test tube 05 and the pumping tube 03 are fixedly connected by bolts. In this embodiment, special flanges or connection plates are designed at the connection of the test tube 05 and the pumping tube 03, and through holes matching the bolts are provided on the flanges or connection plates. By inserting bolts into the through holes and tightening the nuts, the tight connection between the test tube 05 and the pumping tube 03 can be achieved. In addition, in order to ensure the sealing performance of the connection, sealing gaskets such as rubber gaskets and asbestos gaskets are usually padded between the flanges or connection plates. These gaskets can effectively prevent medium leakage and ensure the normal operation of the system.

[0053] When it is necessary to disassemble or install the test tube 05, it can be easily completed by simply loosening the bolts. This connection method greatly simplifies the maintenance process of the system, improves work efficiency, and also greatly enhances the efficiency of replacing different test bridge plugs 06. At the same time, since the connection between the test bridge plug 06 and the bridge plug tooling 08 is relatively simple, it also reduces the manufacturing and installation costs.

[0054] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test device for bridge plug pumping, characterized in that: include: Pump body, liquid storage tank, pumping pipe and flow meter; The liquid storage tank is connected to both ends of the pumping pipe, the pump body and the flow meter are respectively arranged on the pumping pipe, and the pump body is used to control the fluid in the liquid storage tank to flow in the pumping pipe; The pumping pipe is provided with a test pipe, the test pipe is used to accommodate a test bridge plug, a resistance measuring device is provided in the test pipe, and the resistance measuring device is connected to the test bridge plug, so as to measure the resistance of the test bridge plug under fluid; A detachable pumping ring is arranged in the middle of the test bridge plug. When the pumping ring is used, the skirt of the pumping ring can be opened by the impact of fluid.

2. The test device according to claim 1, characterized in that The resistance measuring device is a dynamometer. A cross bar is provided at the front end of the test tube. One end of the dynamometer is fixed on the cross bar, and the other end is connected to the test bridge plug.

3. The test device according to claim 1, characterized in that: The resistance measuring device is a pressure sensor. A fixing frame is provided at the rear end of the test tube. The pressure sensor is arranged at the center of the fixing frame, so that the test bridge plug is embedded in the fixing frame and abuts against the pressure sensor.

4. The test device according to any one of claims 1 to 3, characterized in that The middle part of the test tube is made of transparent material.

5. The test device according to any one of claims 1 to 3, characterized in that A protection tube is arranged on the pumping tube, the protection tube is arranged in parallel with the test tube, and a safety valve is arranged on the protection tube.

6. The test device according to any one of claims 1 to 3, characterized in that The pumping pipe is provided with a filter screen, and the filter screen is located between the water return port of the liquid storage tank and the test pipe.

7. The test device according to any one of claims 1 to 3, characterized in that The test pipe and the pumping pipe are fixedly connected by bolts.

8. The test device according to any one of claims 1 to 3, characterized in that The test bridge plug is provided with a detachable bridge plug tool, and the bridge plug tool is used to increase the diameter of the test bridge plug.

9. The test device according to any one of claims 1 to 3, characterized in that The test equipment also includes a data control system, which is electrically connected to the resistance measuring device, the flow meter and the pump body respectively, and is used to collect the values ​​of the resistance measuring device and the flow meter, and control the operation of the pump body.

Images