Ground jet flow blocking removal test device and working method thereof

Abstract

The invention belongs to the technical field of downhole tools, and relates to a ground jet flow blocking removal test device and a working method thereof. Comprising an upper outer cylinder, the upper outer cylinder is detachably connected with a lower outer cylinder, a nozzle assembly is embedded in the end of the upper outer cylinder, the nozzle assembly is used for forming high-pressure jet flow and achieving cutting of the plug face of a sand scale plug pipe, and a hand-cranking push rod is used for adjusting the position of the sand scale plug pipe before an experiment, and the sand scale plug pipe and the hand-cranking push rod are movably embedded in the lower outer cylinder. The sand scale plug pipe is located between the hand-cranking push rod and the nozzle assembly, a pressure gauge, an electric control valve and a Y-shaped filter are arranged on the upper outer cylinder and all communicated with the interior of the upper outer cylinder, and the pressure gauge and the electric control valve are both connected with a pressure control box. The pressure control box is used for controlling the electric adjusting valve so as to adjust and control the internal pressure of the upper outer cylinder. The device can realize a ground pressure jet flow unblocking test, is used for simulating the jet flow unblocking operation of the coiled tubing in a well, and can observe the unblocking effect after the jet flow unblocking is completed.

Description

Technical Field

[0001] The invention belongs to the technical field of downhole tools, and relates to a ground jet plugging removal test device and a working method thereof. Background Art

[0002] During the oil and gas production process, wax deposition, scale formation, sand production, etc. often occur in oil and gas production wells. Wax and scale deposition cause serious blockage of the wellbore and prevent normal gas production, and even lead to well shut-in and production suspension. Sand production easily causes wear of the tubing string in the well, and more seriously, it will cause sand sticking. At present, the mainstream means of wax and scale removal are chemical and thermal wax removal combined with mechanical wax removal. The process is relatively complex, and formation pollution will be caused if there is leakage. At the same time, as the oil and gas wells are continuously deepened, the well conditions are more difficult to observe, resulting in incomplete plugging removal operations. Therefore, the conventional wax and scale removal means have greater risks to formation environmental protection, and the complex construction procedures lead to increased costs. It has gradually been unable to meet the requirements of on-site construction, and the construction effect is difficult to evaluate. Summary of the Invention

[0003] In order to overcome the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a ground jet plugging removal test device and a working method thereof. The present invention can realize a ground pressure jet plugging removal test, be used to simulate the jet plugging removal operation of coiled tubing in the well, and be able to observe the plugging removal effect after the jet plugging removal is completed.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The present invention discloses a ground jet plugging removal test device, which includes an upper outer cylinder. The upper outer cylinder is detachably connected to a lower outer cylinder. A nozzle assembly is embedded at the end of the upper outer cylinder. A sand and scale plugging tube and a hand-operated push rod are movably embedded inside the lower outer cylinder. The sand and scale plugging tube is located between the hand-operated push rod and the nozzle assembly. A pressure gauge, an electric control valve and a Y-type filter are arranged on the upper outer cylinder. The pressure gauge, the electric control valve and the Y-type filter are all communicated with the inside of the upper outer cylinder. The pressure gauge and the electric control valve are both connected to a pressure control box.

[0006] Furthermore, the upper outer cylinder, the lower outer cylinder and the Y-type filter are all arranged on a device support frame. A slideway is opened on the device support frame. The lower outer cylinder is connected to the slideway through a fixed clamp.

[0007] Furthermore, the upper outer cylinder and the lower outer cylinder are connected by a union.

[0008] Furthermore, an upper joint is embedded at the end of the upper outer cylinder. The upper joint is connected to the nozzle assembly. The nozzle assembly is located inside the cavity of the upper outer cylinder.

[0009] Furthermore, an O-ring seal is provided between the upper joint and the upper outer cylinder.

[0010] Further, a lower joint is embedded at the end of the lower outer cylinder. A manual push rod is inserted into the lower joint, and the manual push rod is connected to an installation baffle, and the installation baffle is located in the inner cavity of the lower outer cylinder.

[0011] Further, an O-ring seal is provided between the lower outer cylinder and the lower joint.

[0012] Further, the manual push rod is threadedly connected to the lower joint, and a manual handle is provided on the manual push rod.

[0013] Further, both the electric control valve and the Y-type filter are connected to the water outlet.

[0014] Based on the above structure, the present invention also discloses a working method of a ground jet plugging removal test device, including the following steps:

[0015] Install the nozzle assembly at the end of the upper outer cylinder, place the sand and scale plugging pipe inside the lower outer cylinder, adjust the sand and scale plugging pipe to an appropriate position through the manual push rod, and connect the upper outer cylinder and the lower outer cylinder;

[0016] Connect the nozzle assembly to the pump with a high-pressure pipeline, start the pump to pressurize, and the liquid sprays out from the nozzle assembly to form a high-pressure jet, which cuts the plugging surface of the sand and scale plugging pipe. After cutting, the debris enters the Y-type filter from the upper outer cylinder to filter the debris; monitor the internal pressure of the upper outer cylinder through the pressure gauge and transmit it to the pressure control box, and control the electric control valve through the pressure control box to further regulate the internal pressure of the upper outer cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention includes an upper outer cylinder, which is detachably connected to a lower outer cylinder. The upper outer cylinder and the lower outer cylinder are used to jointly form a jet plugging removal test space. The nozzle assembly is used to form a high-pressure jet to realize the cutting of the plugging surface of the sand and scale plugging pipe. The manual push rod is used to adjust the position of the sand and scale plugging pipe before the experiment. The pressure gauge is used to monitor the internal pressure of the upper outer cylinder and transmit it to the pressure control box, and the pressure control box is used to control the electric control valve to further regulate the internal pressure of the upper outer cylinder to ensure the normal progress of the experiment. The present invention can realize a ground jet plugging removal test, be used to simulate the jet plugging removal operation of coiled tubing in a well, and can observe the plugging removal effect after the jet plugging removal is completed.

[0019] In the method of the present invention, the nozzle assembly 103 is installed at the end of the upper outer cylinder 102, the sand scale plug tube 104 is placed inside the lower outer cylinder 105, the sand scale plug tube 104 is adjusted to an appropriate position by manually shaking the push rod, and the upper outer cylinder 102 and the lower outer cylinder 105 are connected. A high-pressure pipeline is used to connect the nozzle assembly 103 with the pump. The pump is started to pressurize, and the liquid sprays out from the nozzle assembly 103 to form a high-pressure jet, so as to cut the plug surface of the sand scale plug tube 104. After cutting, the debris enters the Y-shaped filter 113 from the upper outer cylinder 102 to filter the debris; the internal pressure of the upper outer cylinder 102 is monitored by the pressure gauge 109 and transmitted to the pressure control box 110. The electric control valve 112 is controlled by the pressure control box 110 to further regulate the internal pressure of the upper outer cylinder 102. When the internal pressure of the upper outer cylinder 102 exceeds the set value, the pressure control box 110 controls the electric control valve 112 to release the internal pressure of the upper outer cylinder 102 to maintain the pressure stability. The present invention can realize the ground pressure jet plugging removal test, be used to simulate the coiled tubing jet plugging removal operation in the well, and can observe the plugging removal effect after the jet plugging removal is completed. Description of the Drawings

[0020] Figure 1 is the front view of the device of the present invention;

[0021] Figure 2 is the left view of the device of the present invention;

[0022] Figure 3 is the sectional view after the plug tube of the present invention is pushed forward.

[0023] Wherein: 101, upper joint; 102, upper outer cylinder; 103, nozzle assembly; 104, sand scale plug tube; 105, lower outer cylinder; 106, lower joint; 107, manual push rod; 108, union; 109, pressure gauge; 110, pressure control box; 111, device support frame; 112, electric control valve; 113, Y-shaped filter; 114, slideway. Detailed Embodiments

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings:

[0027] See Figure 1 , the present invention discloses a ground jet plugging removal test device, which includes an upper outer cylinder 102. The upper outer cylinder 102 is detachably connected to a lower outer cylinder 105. The upper outer cylinder 102 and the lower outer cylinder 105 are used to jointly form a jet plugging removal test space. A nozzle assembly 103 is embedded at the end of the upper outer cylinder 102. A sand and scale plugging tube 104 and a hand-operated push rod 107 are movably embedded inside the lower outer cylinder 105. The sand and scale plugging tube 104 is located between the hand-operated push rod 107 and the nozzle assembly 103. The nozzle assembly 103 is used to form a high-pressure jet to cut the plugging surface of the sand and scale plugging tube 104. The hand-operated push rod 107 is used to adjust the position of the sand and scale plugging tube 104 before the experiment. A pressure gauge 109, an electric control valve 112 and a Y-type filter 113 are arranged on the upper outer cylinder 102. The pressure gauge 109, the electric control valve 112 and the Y-type filter 113 are all communicated with the inside of the upper outer cylinder 102. The pressure gauge 109 and the electric control valve 112 are both connected to a pressure control box 110. The pressure gauge 109 is used to monitor the internal pressure of the upper outer cylinder 102 and transmit it to the pressure control box 110. The pressure control box 110 is used to control the electric control valve 112 and then regulate the internal pressure of the upper outer cylinder 102 to ensure the normal progress of the experiment. The present invention can realize a ground jet plugging removal test under pressure, be used to simulate the continuous tubing jet plugging removal operation in a well, and can observe the plugging removal effect after the jet plugging removal is completed.

[0028] See Figure 1, in another feasible embodiment of the present invention, the following is adaptively modified according to the situation. It includes an upper outer cylinder 102, the upper outer cylinder 102 is detachably connected to the lower outer cylinder 105, a nozzle assembly 103 is embedded at the end of the upper outer cylinder 102, a sand and scale plugging tube 104 and a hand-operated push rod 107 are movably embedded inside the lower outer cylinder 105, the sand and scale plugging tube 104 is located between the hand-operated push rod 107 and the nozzle assembly 103, a pressure gauge 109, an electric control valve 112 and a Y-type filter 113 are arranged on the upper outer cylinder 102, the pressure gauge 109, the electric control valve 112 and the Y-type filter 113 are all communicated with the inside of the upper outer cylinder 102, and the pressure gauge 109 and the electric control valve 112 are both connected to a pressure control box 110.

[0029] During the jet plugging removal test, first install the nozzle assembly 103 at the end of the upper outer cylinder 102, place the sand and scale plugging tube 104 inside the lower outer cylinder 105, adjust the sand and scale plugging tube 104 to an appropriate position through the hand-operated push rod 107, and then connect the upper outer cylinder 102 and the lower outer cylinder 105 to complete the assembly of the device.

[0030] After the device assembly is completed, connect the nozzle assembly 103 to the pump with a high-pressure pipeline, start the pump to pressurize, and the liquid sprays out from the nozzle assembly 103 to form a high-pressure jet. The high-pressure jet cuts the plugging surface of the sand and scale plugging tube 104, and the cut debris and the liquid enter the Y-type filter 113 from the upper outer cylinder 102 for debris filtration. During the jet plugging removal test, the internal pressure of the upper outer cylinder 102 is monitored by the pressure gauge 109 and transmitted to the pressure control box 110. The electric control valve 112 is controlled by the pressure control box 110 to further regulate the internal pressure of the upper outer cylinder 102. The pressure control box 110 is used to display the pressure value monitored by the pressure gauge 109. At the same time, the electric control valve 112 can be adjusted according to the monitored pressure value.

[0031] Embodiment 1:

[0032] See Figure 1 , this embodiment discloses a ground jet plugging removal test device, which includes an upper outer cylinder 102, the upper outer cylinder 102 is detachably connected to the lower outer cylinder 105, a nozzle assembly 103 is embedded at the end of the upper outer cylinder 102, a sand and scale plugging tube 104 and a hand-operated push rod 107 are movably embedded inside the lower outer cylinder 105, the sand and scale plugging tube 104 is located between the hand-operated push rod 107 and the nozzle assembly 103, a pressure gauge 109, an electric control valve 112 and a Y-type filter 113 are arranged on the upper outer cylinder 102, the pressure gauge 109, the electric control valve 112 and the Y-type filter 113 are all communicated with the inside of the upper outer cylinder 102, and the pressure gauge 109 and the electric control valve 112 are both connected to a pressure control box 110.

[0033] The upper outer cylinder 102, the lower outer cylinder 105, and the Y-type filter 113 are all arranged on the device support frame 111. A slideway 114 is provided on the device support frame 111, and the lower outer cylinder 105 is connected to the slideway through a fixing clamp. After the fixing clamp clamps the lower outer cylinder 105, it can axially displace on the slideway 114 to adjust the position of the lower outer cylinder.

[0034] The upper outer cylinder 102 and the lower outer cylinder 105 are connected by a union 108. The function of the union 108 is to seal the annulus between the upper outer cylinder 102 and the lower outer cylinder 105, and at the same time squeeze and fix the sand and scale plugging pipe 104 to prevent the sand and scale plugging pipe 104 from moving during the test.

[0035] Embodiment 2:

[0036] See Figure 1 , this embodiment discloses a ground jetting plugging removal test device, including an upper outer cylinder 102, the upper outer cylinder 102 is detachably connected to a lower outer cylinder 105, a nozzle assembly 103 is embedded at the end of the upper outer cylinder 102, a sand and scale plugging pipe 104 and a hand-operated push rod 107 are movably embedded inside the lower outer cylinder 105, the sand and scale plugging pipe 104 is located between the hand-operated push rod 107 and the nozzle assembly 103, a pressure gauge 109, an electric control valve 112, and a Y-type filter 113 are arranged on the upper outer cylinder 102, the pressure gauge 109, the electric control valve 112, and the Y-type filter 113 are all communicated with the inside of the upper outer cylinder 102, and the pressure gauge 109 and the electric control valve 112 are both connected to a pressure control box 110.

[0037] An upper joint 101 is embedded at the end of the upper outer cylinder 102, the upper joint 101 is connected to the nozzle assembly 103, and the nozzle assembly 103 is located inside the cavity of the upper outer cylinder 102.

[0038] An O-ring seal is provided between the upper joint 101 and the upper outer cylinder 102.

[0039] Embodiment 3:

[0040] See Figure 1 , this embodiment discloses a ground jetting plugging removal test device, including an upper outer cylinder 102, the upper outer cylinder 102 is detachably connected to a lower outer cylinder 105, a nozzle assembly 103 is embedded at the end of the upper outer cylinder 102, a sand and scale plugging pipe 104 and a hand-operated push rod 107 are movably embedded inside the lower outer cylinder 105, the sand and scale plugging pipe 104 is located between the hand-operated push rod 107 and the nozzle assembly 103, a pressure gauge 109, an electric control valve 112, and a Y-type filter 113 are arranged on the upper outer cylinder 102, the pressure gauge 109, the electric control valve 112, and the Y-type filter 113 are all communicated with the inside of the upper outer cylinder 102, and the pressure gauge 109 and the electric control valve 112 are both connected to a pressure control box 110.

[0041] The end of the lower outer cylinder 105 is embedded with a lower joint 106. A hand-operated push rod 107 is inserted through the lower joint 106. The hand-operated push rod 107 is connected to an installation baffle, and the installation baffle is located in the inner cavity of the lower outer cylinder 105.

[0042] An O-ring seal is provided between the lower outer cylinder 105 and the lower joint 106.

[0043] The hand-operated push rod 107 is threadedly connected to the lower joint 106, and a hand-operated handle is provided on the hand-operated push rod 107.

[0044] Example 4:

[0045] See Figure 1 , this example discloses a ground jet plugging removal test device, which includes an upper outer cylinder 102. The upper outer cylinder 102 is detachably connected to the lower outer cylinder 105. The end of the upper outer cylinder 102 is embedded with a nozzle assembly 103. A sand and scale plugging tube 104 and a hand-operated push rod 107 are movably embedded inside the lower outer cylinder 105. The sand and scale plugging tube 104 is located between the hand-operated push rod 107 and the nozzle assembly 103. A pressure gauge 109, an electric control valve 112, and a Y-type filter 113 are arranged on the upper outer cylinder 102. The pressure gauge 109, the electric control valve 112, and the Y-type filter 113 are all communicated with the inside of the upper outer cylinder 102. The pressure gauge 109 and the electric control valve 112 are both connected to a pressure control box 110.

[0046] Both the electric control valve 112 and the Y-type filter 113 are connected to the water outlet.

[0047] Example 5:

[0048] See Figure 1 , this example discloses a ground jet plugging removal test device, which includes an upper joint, a nozzle assembly, an upper outer cylinder, a union, a lower outer cylinder, a sand and scale plugging tube, a lower joint, a hand-operated push rod, a pressure gauge, a pressure control box, a slideway, a Y-type filter, and a device support frame;

[0049] The upper joint is threadedly connected to the upper outer cylinder, and the nozzle assembly is installed at the right end of the upper joint; the upper outer cylinder is provided with an open channel for liquid discharge; the sand and scale plugging tube is installed inside the lower outer cylinder; the lower joint is threadedly connected to the lower outer cylinder; the hand-operated push rod is threadedly installed at the right end of the lower joint, and the left end of the hand-operated push rod contacts the right end of the sand and scale plugging tube. The hand-operated push rod can push the sand and scale plugging tube by rotating the hand crank; the upper outer cylinder and the lower outer cylinder are connected by a union;

[0050] The pressure gauge is threadedly installed on the upper outer cylinder and is connected to the pressure control box. The pressure control box can display the value of the pressure gauge; the device support frame is provided with an electric control valve, and the electric control valve is connected to the open channel of the upper outer cylinder; the electric control valve and the pressure gauge are connected to the pressure control box through a control cable. The pressure control box can control the pressure inside the device by controlling the electric control valve after reaching the set pressure;

[0051] Preferably, the slideway and the Y-shaped filter are installed on the device support frame;

[0052] Preferably, the device support frame has a water outlet pipeline, the water outlet pipeline is connected to the opening flow channel of the upper outer cylinder, and the Y-shaped filter is connected to the water outlet pipeline to complete debris filtration;

[0053] Preferably, the lower outer cylinder is connected to the slideway through a fastening clip and can axially slide;

[0054] Preferably, the scale and plugging tube can be filled with different contents to simulate the wax and scale plugging situation in the well;

[0055] Preferably, the union connects the upper outer cylinder and the lower outer cylinder, fixes the scale and plugging tube and forms a seal;

[0056] Example 6:

[0057] See Figure 1 , this embodiment discloses a ground jet plugging removal test device, including an upper joint 101, an upper outer cylinder 102, a nozzle assembly 103, a scale and plugging tube 104, a lower outer cylinder 105, a lower joint 106, a hand-operated push rod 107, a union 108, a pressure gauge 109, a pressure control box 110, a device support frame 111, an electric control valve 112, a Y-shaped filter 113, and a slideway 114.

[0058] As Figure 1 shown, the left end of the upper joint 101 is connected to the high-pressure pipeline through a tapered thread, the right end of the upper joint 101 is installed with the nozzle assembly 103 through a thread, the upper joint 101 is connected to the upper outer cylinder 102 through a surface thread, and the O-ring is used to isolate the internal and external pressures. The lower outer cylinder 105 is connected to the slideway through a fixing clip. After the fixing clip clamps the lower outer cylinder 105, it can axially displace on the slideway 114 to adjust the position of the lower outer cylinder 105. The lower joint 106 is connected to the lower outer cylinder 105 through a thread, and the O-ring is used to isolate the internal and external pressures. The hand-operated push rod 107 is installed at the right end of the lower joint 106 through a thread. The left end of the hand-operated push rod 107 passes through the left end of the lower joint 106 and installs a baffle to prevent the hand-operated push rod 107 from withdrawing from the lower joint 106. The O-ring is used to isolate the internal and external pressures. The baffle at the left end of the hand-operated push rod 107 can axially displace inside the lower outer cylinder 105. The scale and plugging tube 104 is directly installed into the annulus of the lower outer cylinder 105. The right end of the scale and plugging tube 104 contacts the baffle at the left end of the hand-operated push rod 107, and the hand-operated push rod 107 can push the scale and plugging tube 104 to axially displace to the left. The right end of the upper outer cylinder 102 is connected to the left end of the lower outer cylinder 105 through a union 108. The function of the union 108 is to seal the annulus of the upper outer cylinder 102 and the lower outer cylinder 105, and at the same time fix the scale and plugging tube 104 to prevent it from moving during the test.

[0059] As Figure 1 and Figure 2As shown in the figure, the pressure gauge 109 is connected to the upper outer cylinder 102 by means of a thread. Its function is to monitor the confining pressure inside the device. The pressure gauge 109 is connected to the pressure control box 110 through a control cable, and the pressure control box can collect the pressure values displayed by the pressure gauge 109. The electric control valve 112 is connected to the opening flow channel of the upper outer cylinder 102, and the confining pressure inside the upper outer cylinder 102 is controlled by adjusting the cross-sectional area of the water outlet. The electric control valve 112 is connected to the pressure control box 110 through a control cable. When the pressure displayed by the pressure gauge 109 exceeds the set value, the pressure control box 110 controls the electric control valve 112 to adjust the cross-sectional area of the water outlet, so that the pressure inside the upper outer cylinder 102 is maintained at the set value. The Y-type filter 113 is installed on the device support frame 111 and is connected to the opening flow channel of the upper outer cylinder 102 to filter debris through the filter screen.

[0060] As Figure 3 shown, after removing the union 108, the hand-operated push rod 107 can displace leftward by screwing in. The baffle plate at its left end contacts the sand scale plug pipe 104 and pushes the sand scale plug pipe 104 during the screwing-in process. Its main function is to adjust the distance between the nozzle assembly 103 and the left end plug surface of the sand scale plug pipe 104, and the effect of jet plugging removal at different distances can be simulated.

[0061] The present invention can realize ground remote monitoring of the jetting test under pressure, be used to simulate the effect of jet plugging removal in the test well, and greatly reduce the safety risk while observing the plugging removal effect during the ground test.

[0062] The device test provided by the present invention is that the coiled tubing with the nozzle assembly reaches the downhole plug surface, which can directly simulate the jet plugging removal construction and can effectively observe the jet plugging removal operation situation;

[0063] The device provided by the present invention can control the pressure to maintain the design value, does not require personnel operation while simulating the downhole construction situation, realizes remote monitoring of the test, ensures the safety of on-site personnel, and effectively reduces the safety hazards brought by the pressure rise;

[0064] The device provided by the present invention can replace different sand plugging pipes, and different blockages in different situations can be tested by replacing the contents of the plug pipe, realizing the simulation of multiple results by one device, further improving the test efficiency and saving more test costs.

[0065] Based on the above structure, the present invention also discloses a working method of a ground jet plugging removal test device, including the following steps:

[0066] S1. Install the nozzle assembly 103 at the end of the upper outer cylinder 102, place the sand scale plug pipe 104 inside the lower outer cylinder 105, adjust the sand scale plug pipe 104 to an appropriate position through the hand-operated push rod 107, and connect the upper outer cylinder 102 and the lower outer cylinder 105;

[0067] S2. Connect the nozzle assembly 103 to the pump with a high-pressure pipeline, start the pump to pressurize, and the liquid sprays out from the nozzle assembly 103 to form a high-pressure jet, so as to cut the plug surface of the sand scale plugging pipe 104. After cutting, the debris enters the Y-type filter 113 from the upper outer cylinder 102 to filter the debris; monitor the internal pressure of the upper outer cylinder 102 through the pressure gauge 109 and transmit it to the pressure control box 110, and control the electric control valve 112 through the pressure control box 110 to further regulate the internal pressure of the upper outer cylinder 102.

[0068] See Figure 1 , in another feasible embodiment of the present invention, the following is adaptively modified according to the situation. Install the nozzle assembly 103 at the end of the upper outer cylinder 102, place the sand scale plugging pipe 104 inside the lower outer cylinder 105, adjust the sand scale plugging pipe 104 to an appropriate position through the hand-operated push rod 107, and connect the upper outer cylinder 102 and the lower outer cylinder 105. Connect the nozzle assembly 103 to the pump with a high-pressure pipeline, start the pump to pressurize, and the liquid sprays out from the nozzle assembly 103 to form a high-pressure jet, so as to cut the plug surface of the sand scale plugging pipe 104. After cutting, the debris enters the Y-type filter 113 from the upper outer cylinder 102 to filter the debris; monitor the internal pressure of the upper outer cylinder 102 through the pressure gauge 109 and transmit it to the pressure control box 110, and control the electric control valve 112 through the pressure control box 110 to further regulate the internal pressure of the upper outer cylinder 102. When the internal pressure of the upper outer cylinder 102 exceeds the set value, the pressure control box 110 controls the electric control valve 112 to release the internal pressure of the upper outer cylinder 102 to maintain stable pressure. The present invention can realize the ground pressure jet plugging removal test, be used to simulate the coiled tubing jet plugging removal operation in the well, and can observe the plugging removal effect after the jet plugging removal is completed.

[0069] Embodiment VII:

[0070] This embodiment discloses a working method of a ground jet plugging removal test device, and the specific steps are as follows:

[0071] S1. Install the nozzle assembly 103 at the right end of the upper joint 101, and then install the upper joint 101 at the left end of the upper outer cylinder 102.

[0072] S2. Connect the lower outer cylinder 105 to the slideway 114 through a fastening clip, slide it to the right away from the upper outer cylinder, load the sand scale plugging pipe 104 with scale blockage from the left end of the lower outer cylinder 105, and use the hand-operated push rod 107 to push the sand scale plugging pipe 104 to adjust the distance between the left end plug surface and the nozzle assembly 103.

[0073] S3. After adjusting the plug surface position, push the lower outer cylinder 105 and connect the upper outer cylinder 102 and the lower outer cylinder 105 with a union 108.

[0074] S4. Connect the upper joint 101 to the pump with a high-pressure pipeline. Connect the outlet of the device support frame 111 to the outlet pipeline. Start the pump to pressurize. The liquid will be ejected from the nozzle assembly 103 to form a high-pressure jet, realizing the cutting of the plug surface. After cutting, the debris will flow out from the opening flow channel of the upper joint 101 and be filtered by the Y-type filter 113. The internal pressure in the annulus of the upper joint 101 is transmitted to the pressure control box 110 through the pressure gauge 109. When the pressure exceeds the set value, the pressure control box 110 controls the electric control valve 112 to release pressure to maintain stable pressure.

[0075] S5. After completing the jet plugging removal test, stop the pump. After the pressure drops to 0 MPa, remove the union 108 and take out the sand scale plug pipe 104 to observe the jet plugging removal effect. Remove the Y-type filter 113 to collect the debris, and the sand scale plug pipe 104 can be replaced to continue the test.

[0076] S6. After the test, take out the sand scale plug pipe 104, remove the high-pressure pipeline and the outlet pipeline, maintain the ground jet plugging removal test device and wait for the next use.

[0077] The above content is only to illustrate the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A ground jet plugging removal test device, characterized in that, It includes an upper outer cylinder (102), the upper outer cylinder (102) is detachably connected to the lower outer cylinder (105), a nozzle assembly (103) is embedded at the end of the upper outer cylinder (102), a sand and scale plug pipe (104) and a hand-operated push rod (107) are movably embedded inside the lower outer cylinder (105), the sand and scale plug pipe (104) is located between the hand-operated push rod (107) and the nozzle assembly (103), a pressure gauge (109), an electric control valve (112) and a Y-type filter (113) are arranged on the upper outer cylinder (102), the pressure gauge (109), the electric control valve (112) and the Y-type filter (113) are all communicated with the inside of the upper outer cylinder (102), and the pressure gauge (109) and the electric control valve (112) are both connected to a pressure control box (110).

2. The ground jet plugging removal test device according to claim 1, characterized in that, The upper outer cylinder (102), the lower outer cylinder (105) and the Y-type filter (113) are all arranged on a device support frame (111), a slideway (114) is opened on the device support frame (111), and the lower outer cylinder (105) is connected to the slideway through a fixed clamp.

3. The ground jet plugging removal test device according to claim 2, characterized in that, The upper outer cylinder (102) is connected to the lower outer cylinder (105) through a union (108).

4. The ground jet plugging removal test device according to claim 3, characterized in that, An upper joint (101) is embedded at the end of the upper outer cylinder (102), the upper joint (101) is connected to the nozzle assembly (103), and the nozzle assembly (103) is located inside the inner cavity of the upper outer cylinder (102).

5. The ground jet plugging removal test device according to claim 4, characterized in that, An O-ring seal is provided between the upper joint (101) and the upper outer cylinder (102).

6. The ground jet plugging removal test device according to claim 3, characterized in that, A lower joint (106) is embedded at the end of the lower outer cylinder (105), the hand-operated push rod (107) passes through the lower joint (106), and the hand-operated push rod (107) is connected to an installation baffle, and the installation baffle is located inside the inner cavity of the lower outer cylinder (105).

7. The ground jet plugging removal test device according to claim 6, characterized in that, An O-ring seal is provided between the lower outer cylinder (105) and the lower joint (106).

8. The ground jet plugging removal test device according to claim 6, characterized in that, The hand-operated push rod (107) is connected to the lower joint (106) by a thread, and a hand-operated handle is provided on the hand-operated push rod (107).

9. The ground jet plugging removal test device according to claim 1, characterized in that, Both the electric control valve (112) and the Y-type filter (113) are connected to a water outlet.

10. A working method of the ground jet plugging removal test device according to any one of claims 1 to 9, characterized in that, It includes the following steps: Install the nozzle assembly (103) at the end of the upper outer cylinder (102), place the sand and scale plug pipe (104) inside the lower outer cylinder (105), adjust the sand and scale plug pipe (104) to an appropriate position through the hand-operated push rod (107), and connect the upper outer cylinder (102) and the lower outer cylinder (105); Connect the nozzle assembly (103) and the pump with a high-pressure pipeline, start the pump to pressurize, the liquid sprays out from the nozzle assembly (103) to form a high-pressure jet, cut the plug surface of the sand and scale plug pipe (104), the debris after cutting enters the Y-type filter (113) from the upper outer cylinder (102) to filter the debris; monitor the internal pressure of the upper outer cylinder (102) through the pressure gauge (109) and transmit it to the pressure control box (110), and control the electric control valve (112) through the pressure control box (110) to further regulate the internal pressure of the upper outer cylinder (102).

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