Hydraulic fracturing temporary plugging agent slotted screen pipe trafficability evaluation device and system

Abstract

The invention discloses a hydraulic fracturing temporary plugging agent slotted screen pipe trafficability evaluation device which comprises a sleeve and further comprises a slotted screen pipe, the slotted screen pipe is arranged in the sleeve in a sleeved mode, the outer circumferential wall of the slotted screen pipe abuts against the inner circumferential wall of the sleeve, and a plurality of first slots are formed in the circumferential wall of the slotted screen pipe in the circumferential direction of the slotted screen pipe at intervals. Each first kerf has a length, the length direction is parallel to the axial direction of the slotted screen pipe, a plurality of second kerfs corresponding to the first kerfs in a one-to-one mode are formed in the circumferential wall of the sleeve pipe, and the slotted screen pipe and the sleeve pipe are arranged in a mutually-rotating mode and are arranged in a mutually-sliding mode in the axial direction of the slotted screen pipe and the sleeve pipe. And the corresponding first kerfs and second kerfs form a plurality of overlapped forms. The pressure borne by the test screen pipe can be adjusted in a large range, and the slotted screen pipe can meet the technical requirements of oil and gas well completion in practical application.

Description

Technical Field

[0001] The invention relates to the technical field of slotted screen pipes, and in particular to a hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device and system. Background Art

[0002] During the oil production process, the slotted screen can prevent the wellbore from collapsing, maintain the stability of the oil well, and ensure the smooth progress of the subsequent development process. There are many types of completion methods in my country. There are almost no major technical difficulties in the horizontal well completion of conventional oil and gas reservoirs. In addition, horizontal wells, branch wells and small wellbores have been promoted and used. Completion technologies under complex geological conditions, high-sulfur gas field completion technologies, high-temperature and high-pressure well completion technologies, and underbalanced completion technologies have gradually matured in research. Shengli Oilfield Production Technology Research Institute has successfully developed the horizontal well screen completion integrated technology in China, which has initially formed a relatively complete completion technology. This technology is widely used in the development of Shengli, Jidong and other oilfields, but there are still shortcomings such as insufficient screen strength and the inability of the screen to adapt to complex geological structures. It is necessary to carry out the introduction, absorption and independent innovation of completion tools, realize the independent intellectual property rights of tools, and accelerate the research and development of self-owned completion technologies to meet the urgent needs of oil and gas development for completion technologies. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device and system, which is intended to evaluate and optimize the slotted screen pipe to meet the production sand control and prevention of wellbore collapse, while also meeting the implementation of temporary plugging acid fracturing and other production increase measures. The evaluation system has the advantages of simple structure, convenient operation, and flexible assembly. It can achieve a wide range of adjustment of the test screen pipe's pressure resistance, so that the slotted screen pipe can meet the technical requirements of oil and gas well completion in practical applications.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device, comprising a casing with openings at both ends, one end of the two ends being an upstream end and the other end being a downstream end, and also comprising a slotted screen pipe, which is sleeved in the casing and whose outer circumferential wall abuts against the inner circumferential wall of the casing and whose axis coincides with the axis of the casing, a plurality of first slots arranged at intervals are provided on the circumferential wall of the slotted screen pipe along its circumferential direction, each of the slots has a length and the length direction is parallel to the axial direction of the slotted screen pipe, a plurality of second slots corresponding to the plurality of first slots are provided on the circumferential wall of the casing, one end of the slotted screen pipe is an outer end and the other end is an inner end, the inner end is adjacent to the downstream end and a closed structure is formed at the inner end, the slotted screen pipe and the casing are arranged to rotate with each other and slide with each other along the axial direction of the two, so that the corresponding first slots and second slots form a plurality of overlapping forms.

[0006] Preferably, it further comprises a cylinder coupled to the inner end of the slotted screen pipe, the inner end being open, the axial direction of the cylinder coinciding with the axial direction of the slotted screen pipe, the inner wall surface of the slotted screen pipe at the inner end being provided with an internal thread, the circumferential surface of the cylinder corresponding to the inner end being provided with an external thread matching the internal thread, the cylinder being coupled to the inner end through a threaded connection between the internal thread and the external thread to form the closed structure, the circumferential surface of the cylinder being provided with a guide groove extending along its axial direction, the inner wall position of the sleeve corresponding to the guide groove being provided with a guide protrusion matching the guide groove.

[0007] Preferably, the slotted screen tube includes two screen tubes, namely a first screen tube and a second screen tube, wherein one end of the first screen tube close to the second screen tube is a first connecting end, and one end of the second screen tube close to the first screen tube is a second connecting end, the first connecting end and the second connecting end are fixedly connected, the other end of the first screen tube opposite to the first connecting end is the inner end, and the other end of the second screen tube opposite to the second connecting end is the outer end, and a plurality of the first slots are provided on the first screen tube and the second screen tube.

[0008] Preferably, a fixing groove is provided on the inner wall of the first sieve tube at the first connection end, and a fixing protrusion matching the fixing groove is provided on the outer peripheral wall of the second sieve tube at the second connection end, and the fixing protrusion is embedded in the fixing groove so that the first sieve tube is fixedly connected to the second sieve tube.

[0009] Preferably, a plurality of the first slits are arranged at even intervals along the circumferential direction.

[0010] Technical effects:

[0011] The evaluation device has the advantages of simple structure, convenient operation, and flexible assembly. It can adjust the pressure of the slotted screen in a wide range, so that the slotted screen can meet the technical requirements of oil and gas well completion in practical applications. The slotted screen and the casing can rotate and slide relative to each other, and the slotting parameters can be adjusted in a wide range. The slots of the casing correspond to the slotted screen one by one, and all the slots of the slotted screen can be adjusted at the same time, so that the slots on the slotted screen can be fully opened and closed, which improves the efficiency and accuracy of the control test.

[0012] The slotted screen pipe and the cylinder are connected by threads, the casing and the cylinder are connected by fixed grooves and fixed protrusions, the axial relative sliding and relative rotational movements of the slotted screen pipe and the casing do not interfere with each other, and the slotting parameters can be adjusted within the maximum range.

[0013] The present invention also provides a hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation system, comprising the hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device as described above, and also comprising a container placed in a vertical direction and having an open lower end, the hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device is placed in the container with its upstream end located at the top and the downstream end located at the bottom, and also comprising an inlet pressure gauge and an outlet pressure gauge, the inlet pressure gauge is installed on the liquid input pipeline connected to the outer end of the slotted screen pipe, and the outlet pressure gauge is installed at the second slot of the sleeve to detect the pressure of the liquid flowing out of the second slot.

[0014] The system has the same technical effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device proposed by the present invention;

[0016] Figure 2 This is a structural exploded view of a hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device proposed by the present invention;

[0017] Figure 3 It is a schematic diagram of the slit moving along the axial direction in the present invention being fully opened and closed;

[0018] Figure 4 A schematic diagram of the fully opened and closed slit along the rotational motion in the present invention;

[0019] Figure 5 It is a structural schematic diagram of the slotted screen pipe passability evaluation system in the present invention.

[0020] Figure 1-5 The accompanying drawings are denoted as follows:

[0021] 1 casing, 2 upstream end, 3 downstream end, 4 first slit, 5 second slit, 6 outer end, 7 inner end, 8 cylinder, 9 guide groove, 10 first screen tube, 11 second screen tube, 12 fixing groove, 13 fixing convex part, 14 container, 15 inlet pressure gauge, 16 outlet pressure gauge, 17 pump, 18 valve. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below.

[0023] The present invention will be described in more detail below with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown, and it should be understood that those skilled in the art can modify the present invention described herein and still achieve the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art, and not as a limitation of the present invention.

[0024] For the sake of clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not described in detail because they would obscure the present invention with unnecessary details. It should be recognized that in the development of any actual embodiment, a large number of implementation details must be made to achieve the specific goals of the developer.

[0025] In order to make the purpose and features of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0026] Combination Figure 1-4 The present invention provides a hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device, comprising a casing 1 with two ends being open, one end of the two ends being an upstream end 2 and the other end being a downstream end 3, and a slotted screen pipe, which is sleeved in the casing 1 and whose outer circumferential wall abuts against the inner circumferential wall of the casing 1 and whose axis coincides with the axis of the casing 1, a plurality of first slots 4 arranged at intervals are provided on the circumferential wall of the slotted screen pipe along its circumferential direction, each of the first slots 4 has a length and the length direction is parallel to the axial direction of the slotted screen pipe, a plurality of second slots 5 corresponding to the plurality of first slots 4 are provided on the circumferential wall of the casing 1, one end of the slotted screen pipe is an outer end 6 and the other end is an inner end 7, the inner end 7 is adjacent to the downstream end 3 and a closed structure is formed at the inner end, the slotted screen pipe and the casing 1 are arranged to rotate with each other and slide with each other along the axial direction of the two, so that the corresponding first slots 4 and second slots 5 form a plurality of overlapping forms.

[0027] The evaluation device has the advantages of simple structure, convenient operation, flexible assembly, etc. It can adjust the pressure of the test slotted screen over a wide range, so that the slotted screen can meet the technical requirements of oil and gas well completion in practical applications. The slotted screen and the casing 1 can rotate and slide relative to each other, and the slotting parameters can be adjusted over a wide range. The slots of the casing 1 correspond to the slotted screen one by one, and all the slots of the slotted screen can be adjusted at the same time, so that the slots on the slotted screen are fully opened and closed, which improves the efficiency and accuracy of the control test.

[0028] In a specific embodiment, it also includes a cylinder 8 coupled to the inner end of the slotted screen pipe, the inner end 7 is open, the axial direction of the cylinder 8 coincides with the axial direction of the slotted screen pipe, the inner wall surface of the slotted screen pipe at the inner end 7 is provided with an internal thread, the cylindrical body 8 is provided with an external thread matching the internal thread on the circumferential surface corresponding to the inner end 7, the cylindrical body 8 is coupled to the inner end 7 by threaded connection of the internal thread and the external thread to form the closed structure, the circumferential surface of the cylindrical body 8 is also provided with a guide groove 9 extending along its axial direction, and the casing 1 is provided with a guide protrusion matching the guide groove 9 at the inner wall position corresponding to the guide groove 9.

[0029] The slotted screen pipe and the cylinder 8 are connected by threads, and the casing 1 and the cylinder 8 are connected by guide grooves and guide protrusions. The axial relative sliding and relative rotational movements of the slotted screen pipe and the casing do not interfere with each other, and the slotting parameters can be adjusted within the maximum range.

[0030] Furthermore, the slotted screen tube includes two screen tubes, namely a first screen tube 10 and a second screen tube 11, wherein one end of the first screen tube 10 close to the second screen tube 11 is a first connecting end, and one end of the second screen tube 11 close to the first screen tube 10 is a second connecting end, the first connecting end and the second connecting end are fixedly connected, the other end of the first screen tube 10 opposite to the first connecting end is the inner end 7, and the other end of the second screen tube 11 opposite to the second connecting end is the outer end 6, and a plurality of the first slots 4 are provided on both the first screen tube 10 and the second screen tube 11.

[0031] In this specific embodiment, a fixing groove 12 is provided on the inner wall of the first sieve tube 10 at the first connection end, and a fixing protrusion 13 matching the fixing groove 12 is provided on the outer peripheral wall of the second sieve tube 11 at the second connection end. The fixing protrusion 13 is embedded in the fixing groove 12 so that the first sieve tube 10 is fixedly connected to the second sieve tube 11.

[0032] Furthermore, a plurality of the first slits 4 are arranged at even intervals along the circumferential direction.

[0033] The slotted screen pipe units can rotate relative to each other, the phase angle between the slots can be controlled, and the slotting parameters can be adjusted in a wide range; the slots of the casing 1 correspond to the slotted screen pipe one by one, and all the slots of the slotted screen pipe can be adjusted at the same time, so that the slots on the slotted screen pipe can be fully opened and closed, thereby improving the efficiency and accuracy of the control test.

[0034] The present invention also provides a hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation system, comprising the hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device as described above, and also comprising a container 14 placed in a vertical direction and having an open lower end, the hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device is placed in the container 14 with its upstream end 2 located at the top and the downstream end 3 located at the bottom, and also comprising an inlet pressure gauge 15 and an outlet pressure gauge 16, the inlet pressure gauge 15 is installed on the liquid input pipeline connected to the outer end of the slotted screen pipe, the outlet pressure gauge 16 is installed at the second slot of the sleeve to detect the pressure of the liquid flowing out of the second slot, and a pump 17 and a valve 18 are installed on the liquid input pipeline.

[0035] The hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device is placed in a container with an opening at the bottom. The liquid flows out from the pump 17, passes through the inlet pressure gauge 15, the slot, the outlet pressure gauge 16 in sequence, and finally flows out through the container 14 with an opening at the bottom. The whole process is completed. The evaluation can be performed by measuring the values ​​of the inlet pressure gauge 15 and the outlet pressure gauge 16.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention, so the above is only an embodiment of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention also includes various equivalent changes and improvements, which will fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device, characterized in that: It comprises a casing with openings at both ends, one of which is an upstream end and the other is a downstream end, and also comprises a slotted screen pipe, which is sleeved in the casing and whose outer circumferential wall abuts against the inner circumferential wall of the casing and whose axis coincides with the axis of the casing, a plurality of first slots arranged at intervals are provided on the circumferential wall of the slotted screen pipe along its circumferential direction, each of the slots has a length and the length direction is parallel to the axial direction of the slotted screen pipe, a plurality of second slots corresponding to the plurality of first slots are provided on the circumferential wall of the casing, one end of the slotted screen pipe is an outer end and the other end is an inner end, the inner end is adjacent to the downstream end and a closed structure is formed at the inner end, the slotted screen pipe and the casing are arranged to rotate with each other and slide with each other along the axial direction of the two, so that the corresponding first slots and second slots form a plurality of overlapping forms.

2. The hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device according to claim 1, characterized in that: It also includes a cylinder coupled to the inner end of the slotted screen pipe, the inner end is open, the axial direction of the cylinder coincides with the axial direction of the slotted screen pipe, the inner wall surface of the slotted screen pipe at the inner end is provided with an internal thread, the circumferential surface of the cylinder corresponding to the inner end is provided with an external thread matching the internal thread, the cylinder is coupled to the inner end through the threaded connection of the internal thread and the external thread to form the closed structure, the circumferential surface of the cylinder is also provided with a guide groove extending along its axial direction, and the sleeve is provided with a guide protrusion matching the guide groove at the inner wall position corresponding to the guide groove.

3. The hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device according to claim 2, characterized in that: The slotted screen tube includes two screen tubes, namely a first screen tube and a second screen tube, wherein one end of the first screen tube close to the second screen tube is a first connecting end, and one end of the second screen tube close to the first screen tube is a second connecting end, the first connecting end and the second connecting end are fixedly connected, the other end of the first screen tube opposite to the first connecting end is the inner end, and the other end of the second screen tube opposite to the second connecting end is the outer end, and a plurality of the first slots are provided on the first screen tube and the second screen tube.

4. The hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device according to claim 3, characterized in that: A fixing groove is provided on the inner wall of the first sieve tube at the first connection end, and a fixing protrusion matching the fixing groove is provided on the outer peripheral wall of the second sieve tube at the second connection end. The fixing protrusion is embedded in the fixing groove so that the first sieve tube is fixedly connected to the second sieve tube.

5. The hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation device according to claim 1, characterized in that: A plurality of the first slits are arranged at even intervals along the circumferential direction.

6. A hydraulic fracturing temporary plugging agent slotted screen pipe passability evaluation system, characterized in that: The hydraulic fracturing temporary plugging agent slotted screen pipe permeability evaluation device comprises the hydraulic fracturing temporary plugging agent slotted screen pipe permeability evaluation device according to any one of claims 1 to 5, and also comprises a container placed in the vertical direction and with an open lower end, the hydraulic fracturing temporary plugging agent slotted screen pipe permeability evaluation device is placed in the container with its upstream end located at the top and the downstream end located at the bottom, and also comprises an inlet pressure gauge and an outlet pressure gauge, the inlet pressure gauge is installed on the liquid input pipeline connected to the outer end of the slotted screen pipe, and the outlet pressure gauge is installed at the second slot of the sleeve to detect the pressure of the liquid flowing out of the second slot.

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