Large-target-distance hydraulic sand blasting perforation experimental device

Abstract

The utility model discloses a large-target-distance hydraulic sand blasting perforation experimental device which comprises a connecting pipe, a continuous oil pipe, a spraying gun, a nozzle, a reciprocating motion mechanism, a spraying disc and a supporting frame. The connecting pipe is connected to the inlet end of the continuous oil pipe, the spray gun is arranged at the outlet end of the continuous oil pipe, the spray nozzle is fixed on the spray gun, the connecting pipe is connected with the reciprocating motion mechanism, the spray disc is arranged at the outlet of the spray nozzle, and the spray disc is fixed on the support frame; and the reciprocating motion mechanism drives the connecting pipe to move so as to adjust the distance between the nozzle and the spraying disc. According to the utility model, the reciprocating motion mechanism drives the connecting pipe to move forwards or backwards, so that the distance between the nozzle and the jet disc can be adjusted, and the target distance can be accurately controlled to verify the sand blasting perforation capacity under different jet target distances.

Description

Technical Field

[0001] The utility model relates to the technical field of casing change well repair in oil and gas field development, in particular to a large-target-distance hydraulic sandblasting perforation experimental device. Background Art

[0002] High-pressure water jet is a technology that uses water as an energy carrier, pressurizes the water flow through a liquid booster device, passes through a high-pressure hose, and forms a high-energy beam through the contraction surface at the nozzle. According to the jet form, high-pressure water jet nozzles can be divided into pure water jet nozzles, abrasive water jet nozzles, pulsed water jet nozzles, and cavitation water jet nozzles. A large number of practices have proved that adding a certain amount of abrasive particles to the pure water jet can improve the cutting effect and work efficiency of the water jet, and change the stagnant dynamic pressure erosion of the water quality in the original pure water jet into the impact dynamic pressure erosion of the abrasive, thereby enhancing the grinding and impact effects on the target material, which in turn leads to a larger cutting depth of the abrasive jet, improves the quality and efficiency of the jet, and makes efficient cutting of steel possible.

[0003] In the process of shale gas development, casing is often used for staged fracturing. The inner diameter of the casing itself is relatively large. Due to formation slippage, creep and other reasons, some wellbore casings are deformed, resulting in a decrease in casing strength and a reduction in inner diameter, which makes it difficult to lower the subsequent perforating tools. In wells with severe casing deformation, the inner diameter is less than half of the original inner diameter, and conventional gunpowder perforating tools cannot be lowered, resulting in the inability to implement reservoir fracturing.

[0004] In view of this situation, a coiled tubing with a small-diameter hydraulic jet tool can be used to perform hydraulic sandblasting perforation on the target well section of the fracturing well through the severely deformed casing section to form a fracturing fluid flow channel and realize the fracturing transformation of the reservoir. However, the injection target distance of the small-diameter hydraulic jet tool is larger than that of the conventional large-diameter jet tool. The design of the jet tool and the optimization of the construction parameters need to be studied through indoor large-target-distance jet tests to study the relationship between the target distance and the nozzle diameter, provide a basis for the design, and verify the hydraulic jet perforation capability of the designed tool. Therefore, it is necessary to design a hydraulic sandblasting perforating device under large target distance to guide tool design and verify tool performance.

[0005] In view of this, this patent application is filed. Utility Model Content

[0006] The utility model aims to provide a large target distance hydraulic sandblasting perforation experimental device to solve the above-mentioned technical problem that there is no device for hydraulic sandblasting perforation verification under large target distance.

[0007] The utility model is realized by the following technical solutions:

[0008] A large-target-distance hydraulic sandblasting perforation experimental device comprises a connecting pipe, a continuous oil pipe, a spray gun, a nozzle, a reciprocating mechanism, a spray disc, and a support frame;

[0009] The connecting pipe is connected to the inlet end of the coiled tubing, the spray gun is arranged at the outlet end of the coiled tubing, the nozzle is fixed on the spray gun, the connecting pipe is connected to the reciprocating mechanism, the spray disc is arranged at the outlet of the nozzle, and the spray disc is fixed on the support frame;

[0010] The reciprocating mechanism drives the connecting pipe to move so as to adjust the distance between the nozzle and the spray disk.

[0011] In an optional embodiment, the connecting pipe is made of a hard material.

[0012] In an optional embodiment, the inlet end of the connecting tube is connected to a buffer tube, the buffer tube is made of a soft material, and the inlet end of the buffer tube is connected to an abrasive water jet generating system.

[0013] In an optional embodiment, the abrasive water jet generating system is connected to the buffer tube via a first adapter, the connecting tube is connected to the buffer tube via a second adapter, and the connecting tube is connected to the coiled tubing via a third adapter.

[0014] In an optional embodiment, the coiled tubing passes through the jet chamber to reach the jet disk, and the jet disk and the support frame are both arranged inside the jet chamber.

[0015] In an optional embodiment, a sleeve is provided on the support frame, the sleeve has two open ends, a sealing cover is provided at one open end of the sleeve to close the opening, the injection disc is fixed on the sealing cover, and the continuous oil pipe is inserted into the sleeve to reach the injection disc.

[0016] In an optional embodiment, the injection disc and the blocking cover are connected by bolts, and the injection disc is located inside the sleeve.

[0017] In an optional embodiment, a buckle is provided on the support frame, one end of the fixing chain is fixedly connected to the support frame, and the other end is wrapped around the sleeve and buckled with the buckle.

[0018] In an optional embodiment, the reciprocating mechanism is fixed on a support platform, and the reciprocating mechanism includes a motor, a screw rod, a support tube, a support column, a screw sleeve, and a moving block. The motor, screw rod, support tube and screw sleeve are all arranged inside the support platform, the power output end of the motor is connected to the screw rod, the screw sleeve is threadedly sleeved on the outside of the screw rod, the moving block is fixed on the screw sleeve and extends to the outside of the support platform, a moving track groove is provided on the support platform, both ends of the screw rod are passed through the support tube and are rotatably connected to the support tube, and the support column is supported on the support tube.

[0019] In an optional embodiment, a support rod is provided on the support platform, a pulley is fixed on the support rod, and the buffer tube is placed in the track of the pulley.

[0020] The advantages and beneficial effects of the utility model compared to the prior art are:

[0021] The utility model provides a large target distance hydraulic sandblasting perforation experimental device, which utilizes a reciprocating mechanism to move a connecting pipe forward or backward, and can adjust the distance between the nozzle and the jet disk, thereby achieving precise control of the target distance and verifying the sandblasting perforation capability under different jet target distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0023] Figure 1 A schematic structural diagram of a large-target-distance hydraulic sandblasting perforating experimental device provided in an embodiment of the utility model.

[0024] Figure 2 A schematic structural diagram of a spray gun and a nozzle of a large-target-distance hydraulic sandblasting perforating experimental device provided in an embodiment of the utility model.

[0025] Figure 3 A schematic structural diagram of a reciprocating mechanism of a large-target-distance hydraulic sandblasting perforating experimental device provided in an embodiment of the utility model.

[0026] Marks and corresponding parts names in the attached drawings:

[0027] 1-first adapter, 2-second adapter, 3-third adapter, 4-pulley, 5-support platform, 6-buffer tube, 7-connecting tube, 8-jet chamber, 9-sleeve, 10-continuous oil pipe, 11-fixed chain, 12-spray gun, 13-nozzle, 14-injection disc, 15-sealing cover, 16-support frame, 17-buckle, 18-motor, 19-screw, 20-support cylinder, 21-support column, 22-screw sleeve, 23-moving block. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0029] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, in order to avoid confusing the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0030] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0032] like Figures 1-2As shown in the figure, a large target distance hydraulic sandblasting perforating experimental device includes a connecting pipe 7, a continuous oil pipe 10, a spray gun 12, a nozzle 13, a reciprocating mechanism, a spray disc 14, and a support frame 16.

[0033] The connecting pipe 7 is connected to the inlet end of the continuous oil tubing 10 and is located at the front end of the continuous oil tubing 10, while the spray gun 12 is arranged at the outlet end of the continuous oil tubing 10 and is located at the rear end of the continuous oil tubing 10. The nozzle 13 is fixed on the spray gun 12. The connecting pipe 7 is connected to the reciprocating movement mechanism. The injection disk 14 is arranged at the outlet of the nozzle 13, and the injection disk 14 is fixed on the support frame 16.

[0034] The reciprocating mechanism can reciprocate and move forward or backward with the connecting pipe 7, so that the spray gun 12 and the nozzle 13 can be moved forward and backward, and the distance between the nozzle 13 and the spray plate 14 can be adjusted to achieve accurate control of the target distance, so as to verify the sandblasting perforation capability under different spray target distances. The upper end of the spray gun 12 is a buckle-type AMMT buckle commonly used in the operation of the continuous oil pipe 10, and the outlet of the spray gun 12 is connected to the test nozzle 13 by thread; there is a groove on the side of the nozzle 13, which is convenient for screwing it into the spray gun 12.

[0035] When in use, the reciprocating mechanism is controlled to work, and the connecting tube 7 is moved forward or backward a certain distance, and the distance between the nozzle 13 and the jet disk 14 is adjusted to achieve precise control of the target distance. After the experiment, the jet disk 14 is taken out, and the different hole sizes formed on the jet disk 14 are compared, and the target distance corresponding to the largest hole is selected as the optimal target distance.

[0036] Furthermore, the connecting pipe 7 is made of hard material. During the spraying process, due to the large water pressure and spraying force, the connecting pipe 7 will generate large vibrations. The use of hard material increases the service life of the connecting pipe 7.

[0037] Furthermore, the inlet end of the connecting pipe 7 is connected to the buffer pipe 6, which is made of a soft material. The inlet end of the buffer pipe 6 is connected to the abrasive water jet generating system. The abrasive water jet generating system and the buffer pipe 6 are connected through a first adapter 1, the connecting pipe 7 and the buffer pipe 6 are connected through a second adapter 2, and the connecting pipe 7 and the continuous oil pipe 10 are connected through a third adapter 3.

[0038] Since the connecting tube 7 moves back and forth during the experiment, a buffer tube 6 made of soft material is provided to provide a certain deformation space so that the buffer tube 6 can be extended or shortened to adapt to the movement of the connecting tube 7 and adjust the distance between the nozzle 13 and the injection disk 14.

[0039] During the spraying process, splashing is inevitable when the abrasive is sprayed onto the spray disc 14 under increased impact. Therefore, a jet chamber 8 is set up, and the continuous oil pipe 10 passes through the jet chamber 8 to reach the spray disc 14. The spray disc 14 and the support frame 16 are both arranged inside the jet chamber 8, so that splashing occurs in the closed jet chamber 8.

[0040] Furthermore, a sleeve 9 is provided on the support frame 16, and the sleeve 9 has two open ends. A plugging cover 15 is provided at one of the open ends of the sleeve 9 to close the opening, and the injection disc 14 is fixed on the plugging cover 15, while the coiled tubing 10 is inserted through the other open end of the sleeve 9 to reach the injection disc 14. Preferably, the injection disc 14 and the plugging cover 15 are connected by bolts, and the injection disc 14 is also located inside the sleeve 9.

[0041] By providing the sleeve 9 and arranging the jet disc 14 in the sleeve 9, the splashing of the abrasive during the experiment can be further limited to the sleeve 9. When a large amount of abrasive is accumulated in the sleeve 9, only the sleeve 9 needs to be replaced without replacing the jet chamber 8. The jet disc 14 and the blocking cover 15 are detachably fixedly connected, so that the jet disc 14 can be easily removed.

[0042] In order to fix the sleeve 9 well on the support frame 16, a buckle 17 is provided on the support frame 16, one end of the fixing chain 11 is fixedly connected to the support frame 16, and the other end is wrapped around the sleeve 9 and engaged with the buckle 17. The fixing chain 11 is wrapped around the sleeve 9 and engaged with the buckle 17, so that the sleeve 9 can be further stabilized to prevent the sleeve 9 from moving during the strong spraying process.

[0043] Embodiment 2:

[0044] On the basis of Example 1, Figure 3As shown in the figure, the reciprocating mechanism is arranged on the support platform 5, and the reciprocating mechanism includes a motor 18, a screw rod 19, a support tube 20, a support column 21, a screw sleeve 22, and a moving block 23. A cavity is provided inside the support platform 5, and the motor 18, the screw rod 19, the support tube 20 and the screw sleeve 22 are all arranged in the internal cavity of the support platform 5. The power output end of the motor 18 is connected to the screw rod 19 to drive the screw rod 19 to rotate, and the screw sleeve 22 is threadedly sleeved on the outside of the screw rod 19 and matched with the screw rod 19 thread. As the screw rod 19 rotates, the screw sleeve 22 will move along the screw rod 19. Moving back and forth, the moving block 23 is fixed on the screw sleeve 22 and extends to the outside of the support platform 5 and is connected to the connecting pipe 7. As the screw sleeve 22 moves back and forth, the moving block 23 moves back and forth. A moving track groove is provided on the support platform 5 to provide space for the movement of the moving block 23. Both ends of the screw rod 19 are passed through the support tube 20 and are rotatably connected to the support tube 20 as shown. For example, bearings can be provided in the support tube 20. Two support columns 21 connect the support tubes 20 at both ends to support the screw rod 19. The lower end of the support column 21 is fixed on the support platform 5.

[0045] Furthermore, a support rod is provided outside the support platform 5, and the support rod is preferably designed to be L-shaped, and a pulley 4 is fixedly provided at the end of the support rod, and the buffer tube 6 is placed in the track of the pulley 4. The pulley 4 supports the buffer tube 6 so that the buffer tube 6 maintains stability during the experiment.

[0046] When conducting the experiment, the parameters of the abrasive water jet generating device are set according to the experimental conditions. The water flows through the first adapter 1, the buffer tube 6, the second adapter 2, the connecting tube 7, the third adapter 3, the continuous oil pipe 10 in sequence, and finally ejected through the nozzle 13 at the front end of the spray gun 12 to perforate the jet disc 14. During the experiment, the motor 18 is started to move the connecting tube 7 back and forth to achieve precise control of the target distance. During the experiment, the sleeve 9 and the jet chamber 8 can prevent liquid splashing and ensure the safety of the experiment. After the experiment, the jet disc 14 is taken out, and the target distance corresponding to the largest hole is compared, and the target distance corresponding to the largest hole is selected as the optimal target distance.

[0047] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above are only specific implementation methods of the utility model and are not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A large target distance hydraulic sandblasting perforation experimental device, characterized in that: It includes connecting pipe, continuous oil pipe, spray gun, nozzle, reciprocating mechanism, spray disc and support frame; The connecting pipe is connected to the inlet end of the coiled tubing, the spray gun is arranged at the outlet end of the coiled tubing, the nozzle is fixed on the spray gun, the connecting pipe is connected to the reciprocating mechanism, the spray disc is arranged at the outlet of the nozzle, and the spray disc is fixed on the support frame; The reciprocating mechanism drives the connecting pipe to move so as to adjust the distance between the nozzle and the spray disk.

2. The large-target-distance hydraulic sandblasting perforation experimental device according to claim 1 is characterized in that: The connecting pipe is made of hard material.

3. The large target distance hydraulic sandblasting perforation experimental device according to claim 1 is characterized in that: The inlet end of the connecting pipe is connected to a buffer pipe, the buffer pipe is made of a soft material, and the inlet end of the buffer pipe is connected to an abrasive water jet generating system.

4. The large target distance hydraulic sandblasting perforation experimental device according to claim 3 is characterized in that: The abrasive water jet generating system is connected to the buffer tube via a first adapter, the connecting tube is connected to the buffer tube via a second adapter, and the connecting tube is connected to the coiled tubing via a third adapter.

5. The large target distance hydraulic sandblasting perforation experimental device according to claim 4 is characterized in that: The coiled oil pipe passes through the jet chamber to reach the jet disc, and the jet disc and the support frame are both arranged inside the jet chamber.

6. A large target distance hydraulic sandblasting perforation experimental device according to any one of claims 3 to 5, characterized in that: The support frame is provided with a sleeve having two open ends. A blocking cover is provided at one open end of the sleeve to close the opening. The injection disc is fixed on the blocking cover. The continuous oil pipe is inserted into the sleeve to reach the injection disc.

7. The large-target-distance hydraulic sandblasting perforation experimental device according to claim 6 is characterized in that: The injection disc is connected to the blocking cover by bolts, and the injection disc is located inside the sleeve.

8. The large-target-distance hydraulic sandblasting perforation experimental device according to claim 7 is characterized in that: The support frame is provided with a buckle, one end of the fixed chain is fixedly connected to the support frame, and the other end is wound around the sleeve and buckled with the buckle.

9. A large target distance hydraulic sandblasting perforation experimental device according to claim 7 or 8, characterized in that: The reciprocating mechanism is fixed on the support platform, and the reciprocating mechanism includes a motor, a screw rod, a support tube, a support column, a screw sleeve, and a moving block. The motor, screw rod, support tube and screw sleeve are all arranged inside the support platform, the power output end of the motor is connected to the screw rod, the screw sleeve is threaded on the outside of the screw rod, the moving block is fixed on the screw sleeve and extends to the outside of the support platform, the moving block is connected to the connecting pipe, and a moving track groove is provided on the support platform, the two ends of the screw rod are passed through the support tube and are rotatably connected to the support tube, and the support column is supported on the support tube.

10. The large target distance hydraulic sandblasting perforation experimental device according to claim 9, characterized in that: The support platform is provided with a support rod, a pulley is fixedly provided on the support rod, and the buffer tube is placed in the track of the pulley.

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