Cable grey injection device

Abstract

This invention relates to the field of wellbore plugging technology, specifically a quick-injection device for cable slurry filling. It includes a short section body with an axial flow channel and a plugging block. The short section body has a through-hole for the plugging block installation on its right side. This invention features a reasonable and compact structure and is easy to use. First, a quick connector is inserted into the slurry injection port. Then, the quick connector is quickly and reliably fixed to the short section body using U-bolts and locking nuts. Next, the quick connector and the slurry injection pump are connected via an injection pipeline. Starting the slurry injection pump fills the slurry cylinder short section with slurry. Stopping the pump and removing the quick connector, along with the plugging plate, seals the slurry injection port. The slurry filling operation can be performed by a single person, effectively saving labor costs, reducing the labor intensity of operators, improving work efficiency, and saving time. This device allows for slurry filling of the slurry cylinder short section from the ground, eliminating the need for a dedicated slurry dumping platform, effectively saving operating costs and improving efficiency.

Description

Technical Field

[0001] This invention relates to the field of wellbore plugging technology and is a cable-operated ash injection device. Background Technology

[0002] In oilfield exploration and development, permanent formation sealing operations require sealing techniques such as cement plugs, bridge plugs, and cable grouting. Cable grouting is widely used in formation sealing technologies across major oilfields in China due to its advantages of short construction cycles, accurate grout volume, precise positioning, and low cost. In existing cable grouting systems, the grouting cylinder is suspended at the wellhead, and at least three workers manually pour grout into the cylinder multiple times through a pouring port located at the top.

[0003] Chinese patent document CN202767940U discloses a self-service mud injection device, which mainly consists of a cylinder, an inlet hole, an outlet hole, a one-way valve, a retaining ring, an air inlet screw, a magnetic piston, an electromagnetic chuck, and electrical components. The cylinder is a detachable structure with an inlet hole at the top and an outlet hole on the lower side wall. The cylinder has a cavity structure, and an electromagnetic chuck is engaged with the bottom of the cavity via a retaining ring. Electrical components are electrically connected below the electromagnetic chuck. A magnetic piston is positioned above the electromagnetic chuck, adhering closely to the inner wall of the cylinder. When the magnetic piston moves to the upper position under the magnetic force of the electromagnetic chuck, it aligns with the outlet hole, sealing it. The bottom inner wall of the cylinder has stepped protrusions, creating a gap between the magnetic piston and the electromagnetic chuck when the piston moves to the lower position. An air inlet screw and a one-way valve are located on the side wall of the cylinder within this gap. During the mud injection process, the device automatically activates according to the designed time, without the need for external force.

[0004] Therefore, the existing mortar filling method used in cable ash discharge cylinders has the following shortcomings in actual use: during mortar filling operations, the mortar pouring platform must be higher than the mortar filling port of the discharge cylinder, otherwise mortar cannot be filled; usually, at least 3 people are required to manually pour and fill the mortar in multiple times, which results in long operation time, low operation efficiency, high labor intensity, and high operation cost. Summary of the Invention

[0005] This invention provides a quick mortar injection device for cables, which overcomes the shortcomings of the prior art. It can effectively solve the problems in the existing mortar injection process, such as the mortar pouring operation platform needing to be higher than the mortar injection port of the mortar injection cylinder, otherwise mortar cannot be injected; usually, at least 3 people are needed to manually pour and inject mortar in multiple times, which results in long operation time, low operation efficiency, high labor intensity, and high operation cost.

[0006] The technical solution of the present invention is achieved through the following measures: a cable ash injection quick injection device includes a short section body with an axial flow channel and a sealing block. The middle right side of the short section body is provided with a sealing block mounting hole that runs through both the inside and outside. A sealing block is provided in the sealing block mounting hole. The lower part of the sealing block is provided with an ash injection port that runs through both the left and right sides. A quick connector with its right end located on the right side of the short section body is detachably installed in the ash injection port. The rear end of the quick connector is provided with a U-shaped notch that opens backward and runs through both the left and right sides. The front end of the quick connector is hinged with a U-shaped bolt whose other end is located in the U-shaped notch and whose left inner side abuts against the outer side of the middle part of the short section body. The other outer side of the U-shaped bolt is provided with a locking nut whose left end abuts against the right side of the rear end of the quick connector. The middle part of the sealing block is provided with a rectangular hole that runs through both the top and bottom. A sealing plate that can seal the ash injection port is provided in the rectangular hole.

[0007] The following are further optimizations and / or improvements to the above-mentioned technical solution: The above may also include an upper connecting block, a lower connecting block, an upper fixing seat, and a lower fixing seat. An upper connecting block and a lower connecting block are respectively provided on the inner side of the upper end and the inner side of the lower end of the rectangular hole. An upper fixing seat and a lower fixing seat, which are fixedly installed together with the corresponding position of the inner side of the short section body on the right side, are respectively fixedly installed on the upper end of the upper connecting block and the lower end of the lower connecting block.

[0008] The above may also include a wrench sleeve, wherein the right side of the sealing block above the ash injection port is provided with a sleeve notch whose left end is connected to the rectangular hole and opens to the right, and the sleeve notch is provided with a wrench sleeve whose left end is fixedly installed together with the upper right side of the sealing plate.

[0009] The above may also include a protective sleeve, a first sealing ring, a second sealing ring, and a wire retaining ring. A protective sleeve that can slide up and down is fitted on the upper outer side of the short section body. At least one first sealing ring is provided between the short section body and the protective sleeve at the position above the sealing block mounting hole, and at least one second sealing ring is provided between the short section body and the protective sleeve at the position below the sealing block mounting hole. An outer ring retaining ring groove is provided on the outer side of the short section body at the position above the first sealing ring, and a wire retaining ring with its lower side abutting against the upper end of the protective sleeve is provided in the outer ring retaining ring groove. An outer ring retaining platform with its upper end abutting against the lower side of the protective sleeve is provided on the outer side of the short section body at the position below the second sealing ring.

[0010] The above may also include a connector sleeve, with the connector sleeve being threadedly connected to the outer side of the upper end of the short section body. The outer side of the upper end of the connector sleeve is provided with an outer ring groove, and the outer ring groove is provided with threads.

[0011] This invention features a reasonable and compact structure, and is easy to use. First, the quick connector is inserted into the ash injection port. Then, the quick connector is quickly and reliably installed and fixed to the short section body using U-bolts and locking nuts. Next, the quick connector and the ash injection pump are connected via the injection pipeline. Starting the ash injection pump allows ash to be injected into the ash cylinder short section. Stopping the pump and removing the quick connector, along with the sealing plate, seals the ash injection port. The ash injection operation can be performed by a single person, effectively saving labor costs, reducing the labor intensity of operators, improving work efficiency, and saving work time. This device allows for ash injection into the ash cylinder short section from the ground, eliminating the need for a dedicated ash pouring platform, effectively saving operating costs and improving efficiency. The protective sleeve and sealing ring effectively prevent ash from overflowing from the gap between the ash injection port and the sealing plate, thus preventing ash injection operations from being affected. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the main sectional view of the ash injection port in the open state of Embodiments 1-5 of the present invention.

[0013] Appendix Figure 2 For the appendix Figure 1 A magnified schematic diagram of the AA cross-section structure.

[0014] Appendix Figure 3 This is a schematic diagram of the main sectional view of the ash injection port in the closed state of Embodiments 1-5 of the present invention.

[0015] Appendix Figure 4 For the appendix Figure 3 A magnified schematic diagram of the BB cross-section structure.

[0016] Appendix Figure 5 This is a scaled-down front view of the structure in the usage state of Embodiments 1-5 of the present invention.

[0017] The codes in the attached diagram are as follows: 1 is the short section body, 2 is the sealing block, 3 is the ash injection port, 4 is the quick connector, 5 is the U-shaped notch, 6 is the U-bolt, 7 is the lock nut, 8 is the rectangular hole, 9 is the sealing plate, 10 is the upper connecting block, 11 is the lower connecting block, 12 is the upper fixing seat, 13 is the lower fixing seat, 14 is the wrench sleeve, 15 is the protective sleeve, 16 is the first sealing ring, 17 is the second sealing ring, 18 is the wire retaining ring, 19 is the outer ring retaining ring groove, 20 is the outer ring retaining platform, 21 is the connector sleeve, 22 is the outer ring groove, 23 is the cable connector, 24 is the ash cylinder short section, 25 is the ash injection short section, 26 is the ash discharge port, 27 is the observation hole, 28 is the axial flow channel, and 29 is the sleeve notch. Detailed Implementation

[0018] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0019] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0020] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 , 2 As shown in Figures 3, 4, and 5, the cable ash injection quick injection device includes a short section body 1 with an axial flow channel 28 and a sealing block 2. The middle right side of the short section body 1 has a sealing block mounting hole that runs through both the inside and outside. The sealing block 2 is installed in the sealing block mounting hole. The lower part of the sealing block 2 has an ash injection port 3 that runs through both the left and right sides. A quick connector 4 with its right end located on the right side of the short section body 1 is detachably installed in the ash injection port 3. The rear end of the quick connector 4 has a U-shaped notch 5 that opens backward and runs through both the left and right sides. The front end of the quick connector 4 is hinged to a U-shaped bolt 6 with its other end located in the U-shaped notch 5 and its left inner side abutting against the outer side of the middle part of the short section body 1. The other outer side of the U-shaped bolt 6 has a locking nut 7 with its left end abutting against the right side of the rear end of the quick connector 4. The middle part of the sealing block 2 has a rectangular hole 8 that runs through both the top and bottom. The rectangular hole 8 has a sealing plate 9 that can seal the ash injection port 3.

[0021] This device was shipped in the following condition: Figure 3As shown, at this time, the sealing plate 9 will close the ash injection port 3 under the action of gravity. In use, connect the cable on the cable winch to the cable connector 23 (in this embodiment, this can be achieved through a cable auger), then install several ash cylinder short sections 24 at the lower end of the cable connector 23, then connect the upper end of the short section body 1 to the inner side of the lower end of the last ash cylinder short section 24 (in this embodiment, this can be achieved through a threaded connection), then connect the ash injection short section 25 to the lower end of the short section body 1, then connect the control end and power end of the ash injection short section 25 to the power supply and the ground control unit respectively through cables, then start the cable winch to suspend the assembled ash injection device above the wellhead. The suspension height can be referenced to the chest and abdomen position of the ash injection port 3 relative to the operator's standing position; then push the sealing plate upward from the ash injection port 3. 9. Open the ash injection port 3, then insert the left part of the quick connector 4 into the ash injection port 3. Then rotate the U-bolt 6 backward to lock the short section body 1 into the U-bolt 6. At this time, the other end of the U-bolt 6 will naturally slide into the U-shaped notch 5. Then, put the locking nut 7 on the outside of the other end of the U-bolt 6 and tighten the locking nut so that its left end is locked against the right side of the rear end of the quick connector 4, thereby preventing the quick connector 4 from falling off. Then, connect the right end of the quick connector 4 to the outlet of the ash injection pump through the injection pipeline, turn on the ash injection pump to start injecting ash into the ash cylinder short section 24. When all the ash cylinder short sections 24 are filled, turn off the mud pump to complete the ash injection. Then, after unscrewing the locking nut 7, rotate the U-bolt 6 in the opposite direction to open it, pull out the quick connector 4, and then push the sealing plate 9 down to seal the ash injection port 3.

[0022] According to requirements, based on the thread type of the upper end of the ash-feeding short section 25 and the lower end of the ash cylinder short section 24, the upper and lower ends of the short section body 1 are respectively provided with matching threads. The ash-feeding short section 25 and the ash cylinder short section 24 can be realized by a cylindrical ash cylinder capable of holding ash slurry and an ash-feeding device capable of implementing cable ash-feeding process downhole, which are known in the art. The ash-feeding short section 25 is provided with an ash discharge port 26 to discharge the ash slurry in the ash cylinder short section 24. To observe whether the ash slurry has filled all the ash cylinder short sections 24, the upper part of the first ash cylinder short section 24 is provided with a ash discharge port 26. The mortar injection pump can be manually started and stopped by a transparent observation window or an observation hole 27 at the top of the first mortar cylinder section 24 (the hole can be drilled on-site; when mortar flows out of the observation hole 27, it can be confirmed that all mortar cylinder sections 24 have been filled with mortar). Alternatively, the pump can be automatically controlled by a level gauge in conjunction with a ground control unit, as is available in existing technologies. Furthermore, the ground control unit can automatically calculate and control the mortar injection capacity based on the number and capacity of the mortar cylinder sections 24, the volume of residual mortar in the injection pipeline, and the pump discharge rate. The ground control unit can... The existing known technologies include single-chip microcomputers, single-board computers, PLCs, DSPs, computers, or workstations. Additionally, the surface control unit is used to control the action of the ash-feeding sub 25 underground. The quick connector 4 can be connected to a connecting plate mounted on the outer right side of the pipe connector using existing known technologies (male or female). One end of the connecting plate can be hinged to one end of the U-bolt 6, and the other end of the connecting plate has a U-shaped notch 5. Installation between the pipe connector and the pipe connector mounting hole can be achieved through nuts, welding, bonding, or interference fit. Alternatively, the above structure can be integrally formed using existing known technologies such as machining, casting, or injection molding; to facilitate the movement of the sealing plate 9, a wrench hole with an opening to the right can be provided on the lower right side of the sealing plate 9; the installation method between the sealing block 2 and the short section body 1 can be achieved by welding, bonding, riveting, or interference fit; to facilitate quick disassembly of the U-bolt 6 without tools, the locking nut 7 can be achieved using existing known technologies such as knurled hand-tightening nuts, wing nuts, handwheel nuts, T-handle nuts, or slotted hand-tightening nuts.

[0023] This invention features a reasonable and compact structure and is easy to use. First, the left end of the quick connector 4 is inserted into the ash injection port 3. Then, the quick connector 4 can be quickly and reliably installed and fixed onto the short section body 1 using the U-bolt 6 and locking nut 7. Next, the quick connector 4 and the ash injection pump can be connected through the injection pipeline. Starting the ash injection pump allows ash to be injected into the ash cylinder short section 24. Stopping the pump and pulling out the quick connector 4, followed by removing the sealing plate 9, seals the ash injection port 3. The ash injection operation can be performed by a single person, effectively saving labor costs, reducing the labor intensity of operators, improving work efficiency, and saving work time. This device allows for ash injection into the ash cylinder short section 24 from the ground, eliminating the need for a dedicated ash dumping platform, effectively saving operating costs and improving work efficiency.

[0024] The above-mentioned cable ash injection device can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached document Figure 1 , 3 As shown, it also includes an upper connecting block 10, a lower connecting block 11, an upper fixing seat 12, and a lower fixing seat 13. The upper connecting block 10 and the lower connecting block 11 are respectively provided on the inner sides of the upper and lower ends of the rectangular hole 8. The upper fixing seat 12 and the lower fixing seat 13, which are fixedly installed on the right side corresponding to the inner side of the short section body 1, are respectively fixedly installed on the upper end of the upper connecting block 10 and the lower end of the lower connecting block 11. This arrangement effectively strengthens the connection between the sealing block 2 and the short section body 1, preventing the sealing block 2 from falling off under mortar pressure. Depending on the requirements, the upper connecting block 10 and the lower connecting block 11 can be connected to the sealing block 2, and the upper fixing seat 12 and the lower fixing seat 13 can be connected to the short section body 1 by riveting, welding, or bonding.

[0025] Example 3: As shown in the attached document Figure 1 , 3 As shown, it also includes a wrench sleeve 14. A sleeve notch 29 is provided on the right side of the sealing block 2 above the ash inlet 3, with its left end connected to the rectangular hole 8 and opening to the right. The sleeve notch 29 contains a wrench sleeve 14, whose left end is fixedly installed to the upper right side of the sealing plate 9. This design guides the wrench sleeve 14; in use, inserting a wrench into the inside of the right end of the wrench sleeve 14 allows for easy and quick up-and-down movement of the sealing plate 9 to open or close the ash inlet 3.

[0026] Example 4: As shown in the appendix Figure 1 , 3As shown in Figure 5, the system also includes a protective sleeve 15, a first sealing ring 16, a second sealing ring 17, and a wire retaining ring 18. The upper outer side of the short section body 1 is fitted with a protective sleeve 15 that can slide up and down. At least one first sealing ring 16 is provided between the short section body 1 and the protective sleeve 15 at the position above the sealing block mounting hole, and at least one second sealing ring 17 is provided between the short section body 1 and the protective sleeve 15 at the position below the sealing block mounting hole. An outer ring retaining ring groove 19 is provided on the outer side of the short section body 1 at the position above the first sealing ring 16. A wire retaining ring 18 is provided in the outer ring retaining ring groove 19, with its lower side abutting against the upper end of the protective sleeve 15. An outer ring retaining platform 20 is provided on the outer side of the short section body 1 at the position below the second sealing ring 17, with its upper end abutting against the lower side of the protective sleeve 15. With this configuration, sliding the protective sleeve 15 upwards exposes the mortar inlet 3, while sliding it downwards covers the sealing block 2, effectively preventing the sealing block 2 from falling off under mortar pressure. The first sealing ring 16 and the second sealing ring 17 effectively prevent mortar from overflowing from the gap between the short section body 1 and the protective sleeve 15, affecting subsequent mortar injection operations. Depending on the requirements, the protective sleeve 15 can be a flexible or rigid sleeve. The outer ring baffle 20 acts as a limit to prevent the protective sleeve 15 from continuing to slide down, while the wire retaining ring 18 effectively prevents the protective sleeve 15 from moving upwards. The wire retaining ring 18 is removed before mortar injection and reinstalled into the outer ring retaining ring groove 19 after the protective sleeve 15 is slid down after mortar injection. Alternatively, the wire retaining ring 18 can also be achieved through a split retaining ring or a shaft retaining ring. To prevent the sealing block 2 from obstructing the vertical sliding of the protective sleeve 15, the shape and size of the right end of the sealing block 2 match the shape and size of the inner side of the protective sleeve 15.

[0027] Example 5: As shown in the attached document Figure 1 , 3 As shown in Figure 5, it also includes a connector sleeve 21. The connector sleeve 21 is threadedly connected to the outer side of the upper end of the short section body 1. The outer side of the upper end of the connector sleeve 21 is provided with an outer annular groove 22, and the outer annular groove 22 is provided with threads. With this configuration, the connector sleeve can be more easily and quickly connected to the standard ash cylinder short section in the prior art, avoiding modification of the standard ash cylinder short section size and saving costs. At the same time, the lower end of the connector sleeve can also limit the upward sliding stroke of the protective sleeve 15. In addition, the connector sleeve can also be used for connection between ash cylinder short sections 24 and between the short section body 1 and the ash feeding short section 25.

[0028] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A cable ash injection quick-release device, characterized in that... The device includes a short section body with an axial flow channel and a sealing block. The middle right side of the short section body has a sealing block mounting hole that runs through both the inside and outside. A sealing block is installed in the sealing block mounting hole. The lower part of the sealing block has a mortar injection port that runs through both the left and right sides. A quick connector with its right end located on the right side of the short section body can be detachably installed in the mortar injection port. The rear end of the quick connector has a U-shaped notch that opens backward and runs through both the left and right sides. The front end of the quick connector is hinged to a U-shaped bolt with its other end located in the U-shaped notch and its left inner side abutting against the outer side of the middle part of the short section body. The other outer side of the U-shaped bolt has a locking nut with its left end abutting against the right side of the rear end of the quick connector. The middle of the sealing block has a rectangular hole that runs through both the top and bottom. A sealing plate that can block the mortar injection port is installed in the rectangular hole.

2. The cable ash injection device according to claim 1, characterized in that... It also includes an upper connecting block, a lower connecting block, an upper fixing seat, and a lower fixing seat. The upper connecting block and the lower connecting block are respectively provided on the inner side of the upper end and the inner side of the lower end of the rectangular hole. The upper fixing seat and the lower fixing seat, which are fixedly installed together with the corresponding positions on the right side of the inner side of the short section body, are respectively fixedly installed on the upper end of the upper connecting block and the lower connecting block.

3. The cable ash injection device according to claim 1 or 2, characterized in that... It also includes a wrench sleeve, which has a sleeve notch on the right side of the sealing block above the ash injection port, with its left end connected to the rectangular hole and opening to the right. The sleeve notch contains a wrench sleeve with its left end fixedly installed together with the upper right side of the sealing plate.

4. The cable ash injection device according to claim 1 or 2, characterized in that... It also includes a protective sleeve, a first sealing ring, a second sealing ring, and a wire retaining ring. The upper outer side of the short section body is fitted with a protective sleeve that can slide up and down. At least one first sealing ring is provided between the short section body and the protective sleeve at the position above the sealing block mounting hole, and at least one second sealing ring is provided between the short section body and the protective sleeve at the position below the sealing block mounting hole. An outer ring retaining ring groove is provided on the outer side of the short section body at the position above the first sealing ring, and a wire retaining ring is provided in the outer ring retaining ring groove, the lower side of which abuts against the upper end of the protective sleeve. An outer ring retaining platform is provided on the outer side of the short section body at the position below the second sealing ring, the upper end of which abuts against the lower side of the protective sleeve.

5. The cable ash injection device according to claim 3, characterized in that... It also includes a protective sleeve, a first sealing ring, a second sealing ring, and a wire retaining ring. The upper outer side of the short section body is fitted with a protective sleeve that can slide up and down. At least one first sealing ring is provided between the short section body and the protective sleeve at the position above the sealing block mounting hole, and at least one second sealing ring is provided between the short section body and the protective sleeve at the position below the sealing block mounting hole. An outer ring retaining ring groove is provided on the outer side of the short section body at the position above the first sealing ring, and a wire retaining ring is provided in the outer ring retaining ring groove, the lower side of which abuts against the upper end of the protective sleeve. An outer ring retaining platform is provided on the outer side of the short section body at the position below the second sealing ring, the upper end of which abuts against the lower side of the protective sleeve.

6. The cable ash injection device according to claim 1, 2, or 5, characterized in that... It also includes a connector sleeve. The upper outer side of the short section body is connected to the connector sleeve by threads. The upper outer side of the connector sleeve is provided with an outer ring groove, and the outer ring groove is provided with threads.

7. The cable ash injection device according to claim 3, characterized in that... It also includes a connector sleeve. The upper outer side of the short section body is connected to the connector sleeve by threads. The upper outer side of the connector sleeve is provided with an outer ring groove, and the outer ring groove is provided with threads.

8. The cable ash injection device according to claim 4, characterized in that... It also includes a connector sleeve. The upper outer side of the short section body is connected to the connector sleeve by threads. The upper outer side of the connector sleeve is provided with an outer ring groove, and the outer ring groove is provided with threads.

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