Downhole cement injection delivery tool
By designing a downhole ash delivery tool including a conveying device and a material storage device, the problem of easy solidification and blockage of underground mortar and high safety risks of gunpowder-driven reverse ash is solved, effectively isolating and transporting the mortar, and operating efficiency and safety are improved.
Patent Information
- Application Number
- CN202311729046.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2025-06-17
AI Technical Summary
In the construction of underground pipelines, the prior art is prone to blockage due to reaction and solidification of the mortar and underground liquid. The success rate of gunpowder-driven ash is low, the operation risk is high, and the residue may remain underground.
A downhole ash delivery tool is provided, including a conveying device and a material storage device. The conveying device moves downward through a motor drive plug, causing the mortar to flow from the lower part of the storage device to the bottom of the well, and the mortar is stirred through the spiral blades to prevent solidification. The material storage device has a plug and a push rod, which is connected to the conveying device through an intermediate joint to achieve isolation and effective conveying of the mortar.
It effectively avoids the reaction and solidification of the mortar and the well fluid, improves operating efficiency, reduces operational risks, and avoids the remnants of detonator residues underground.
Smart Images
Figure CN120159341A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of tubing and casing tools, and particularly to a downhole ash injection and delivery tool. Background Art
[0002] During the construction of downhole pipelines, it is often necessary to pour ash into the well. The existing technologies are mainly divided into mechanical ash pouring and gunpowder-driven ash pouring. During the process of pouring ash into the well using the existing technologies, the mortar is prone to react with calcium carbonate in the downhole liquid under the action of high temperature to produce solidification, resulting in the mortar not flowing out of the container; the success rate of gunpowder driving is low, the procedures before construction are complex, the operation risk is high, and the residues of detonators will remain in the well after detonation.
[0003] In summary, the existing technologies have problems of easy blockage and high safety risks. Summary of the Invention
[0004] The existing technologies have problems of easy blockage and high safety risks.
[0005] In order to alleviate the above technical problems, the technical solution provided by the present invention is as follows:
[0006] The present invention provides a downhole ash injection and delivery tool, including a conveying device and a material storage device; the conveying device includes a first casing, a motor, a lead screw connected to the output shaft of the motor, a nut seat sleeved on the lead screw, and a thrust rod fixedly connected to the lower part of the nut seat; the motor is fixedly connected to the inner wall of the first casing through a motor seat; the material storage device includes a second casing, a plug arranged at the lower part of the second casing, and a push rod connected to the upper part of the plug; the first casing and the second casing are connected through an intermediate joint; the thrust rod is threadedly connected to the push rod; the material storage device has a first state and a second state; in the first state, the conveying device drives the plug to move upward, so that the second casing is fixedly connected to the plug; in the second state, the conveying device drives the plug to move downward, so that the second casing is separated from the plug.
[0007] Furthermore, the material storage device further includes a power sub, and a spiral blade sleeved on the push rod; the power sub can drive the spiral blade to rotate, so that the spiral blade stirs the mortar in the second casing.
[0008] Furthermore, an opening is arranged on the side wall of the second casing.
[0009] Furthermore, a sliding sleeve is sleeved in the second casing; the sliding sleeve is arranged at the opening; a screw is arranged on the side wall of the sliding sleeve; a retaining ring is arranged at the corresponding position of the push rod; the screw is clamped with the upper surface of the retaining ring.
[0010] Furthermore, the conveying device further includes a guide cylinder and a guide block slidably connected to the guide cylinder; the upper part of the guide cylinder abuts against the motor seat, and the lower part is sleeved on the intermediate joint; the guide block is arranged at the lower part of the nut seat and is sleeved on the thrust rod.
[0011] Furthermore, a limit switch is provided on the inner wall of the guide tube.
[0012] Furthermore, it further includes an upper joint; the upper joint is arranged at the upper part of the first sleeve; a conductor is arranged at the upper part of the upper joint; the lower part of the conductor is connected to the motor.
[0013] Furthermore, a sealing seat is also arranged at the lower part of the intermediate joint; the inner wall of the sealing seat is movably connected to the thrust rod; the sealing seat is threadedly connected to the intermediate joint.
[0014] Furthermore, multiple groups of sealing rings are arranged at each connection part of the device.
[0015] The beneficial effects of the present invention are analyzed as follows:
[0016] The present invention provides a downhole cement injection and delivery tool, which includes a conveying device and a material storage device; the conveying device includes a first sleeve, a motor, a lead screw connected to the output shaft of the motor, a nut seat sleeved on the lead screw, and a thrust rod fixedly connected to the lower part of the nut seat; the motor is fixedly connected to the inner wall of the first sleeve through a motor seat; the material storage device includes a second sleeve, a plug arranged at the lower part of the second sleeve, and a push rod connected to the upper part of the plug; the first sleeve and the second sleeve are connected through an intermediate joint; the thrust rod is threadedly connected to the push rod; the material storage device has a first state and a second state; in the first state, the conveying device drives the plug to move upward, so that the second sleeve is fixedly connected to the plug; in the second state, the conveying device drives the plug to move downward, so that the second sleeve is separated from the plug.
[0017] After this equipment is lowered into the well, the motor in the conveying device drives the plug to move downward, so that the cement slurry flows into the bottom of the well from the lower part of the material storage device. This equipment can isolate the cement slurry from the liquid in the well, avoid the cement slurry being polluted by the well fluid and thus causing abnormal phenomena such as solidification, and improve the operation efficiency. Brief Description of the Drawings
[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0019] Figure 1 It is a cross-sectional schematic diagram of the present invention;
[0020] Figure 2 is Figure 1 a partial enlarged view of A in
[0021] Figure 3 isFigure 1 Partial enlarged view of B therein;
[0022] Figure 4 is Figure 1 Partial enlarged view of C therein.
[0023] Icon:
[0024] 100 - First sleeve;
[0025] 200 - Conveying device; 210 - Motor; 220 - Lead screw; 230 - Nut seat; 240 - Thrust rod; 250 - Guide cylinder; 260 - Guide block;
[0026] 300 - Second sleeve; 310 - Sliding sleeve; 311 - Screw; 312 - Retaining ring;
[0027] 400 - Storage device; 410 - Plug; 420 - Push rod; 430 - Power sub - section; 440 - Spiral blade;
[0028] 500 - Intermediate joint; 510 - Sealing seat;
[0029] 600 - Upper joint; 610 - Conductor. Detailed implementation manners
[0030] In the prior art, mechanical ash dumping or gunpowder - driven ash dumping is often adopted. During the process of mechanically dumping ash into the well, the mortar is likely to react with calcium carbonate in the downhole liquid under the action of high temperature to produce solidification, resulting in the mortar being unable to flow out of the container; while the success rate of gunpowder - driven is low, the procedures before construction are complex, the operation risk is high, and the residues of detonators will remain in the well after detonation.
[0031] In view of this, the present invention provides a downhole ash injection and delivery tool, including a conveying device 200 and a storage device 400; the conveying device 200 includes a first sleeve 100, a motor 210, a lead screw 220 connected to the output shaft of the motor 210, a nut seat 230 sleeved on the lead screw 220, and a thrust rod 240 fixedly connected to the lower part of the nut seat 230; the motor 210 is fixedly connected to the inner wall of the first sleeve 100 through a motor seat; the storage device 400 includes a second sleeve 300, a plug 410 arranged at the lower part of the second sleeve 300, and a push rod 420 connected to the upper part of the plug 410; the first sleeve 100 is connected to the second sleeve 300 through an intermediate joint 500; the thrust rod 240 is threadedly connected to the push rod 420; the storage device 400 has a first state and a second state; in the first state, the conveying device 200 drives the plug 410 to move upward, so that the second sleeve 300 is fixedly connected to the plug 410; in the second state, the conveying device 200 drives the plug 410 to move downward, so that the second sleeve 300 is separated from the plug 410.
[0032] After this device is lowered into the well, the motor 210 in the conveying device 200 drives the plug 410 to move downward, allowing the mortar to flow into the bottom of the well from the lower part of the storage device 400. This device can isolate the mortar from the liquid in the well, avoid the pollution of the mortar by the well fluid and the occurrence of abnormal phenomena such as solidification, and improve the operation efficiency.
[0033] Next, the shape and structure of the downhole grouting delivery tool will be described in detail in conjunction with Figures 1 to 4 :
[0034] As Figure 1 shown, the present invention provides a downhole grouting delivery tool, including a conveying device 200 and a storage device 400; the conveying device 200 includes a first casing 100, a motor 210, a lead screw 220 connected to the output shaft of the motor 210, a nut seat 230 sleeved on the lead screw 220, and a thrust rod 240 fixedly connected to the lower part of the nut seat 230; the motor 210 is fixedly connected to the inner wall of the first casing 100 through a motor seat; the storage device 400 includes a second casing 300, a plug 410 arranged at the lower part of the second casing 300, and a push rod 420 connected to the upper part of the plug 410; the first casing 100 is connected to the second casing 300 through an intermediate joint 500; the thrust rod 240 is threadedly connected to the push rod 420; the storage device 400 has a first state and a second state; in the first state, the conveying device 200 drives the plug 410 to move upward, so that the second casing 300 is fixedly connected to the plug 410; in the second state, the conveying device 200 drives the plug 410 to move downward, so that the second casing 300 is separated from the plug 410.
[0035] Specifically, the lower part of the second casing 300 is provided with an opening that gradually expands outward from top to bottom, and the upper part of the plug 410 is a conical structure that gradually expands outward from top to bottom; in the first state, the inclined surface of the plug 410 is in close contact with the opening of the second casing 300, so that the bottom of the storage device 400 is closed; in the second state, the plug 410 moves downward, so that the bottom of the storage device 400 is opened.
[0036] As Figure 4 shown, the storage device 400 further includes a power sub-section 430 and a spiral blade 440 sleeved on the push rod 420; the power sub-section 430 can drive the spiral blade 440 to rotate, so that the spiral blade 440 stirs the mortar in the second casing 300.
[0037] Specifically, a small motor is arranged in the power sub-section 430. During the process of this tool entering the well, the small motor is in a working state and will drive the spiral blade 440 to rotate continuously, thereby stirring the mortar in the storage device 400 and avoiding the caking and solidification of the mortar during the process of entering the well.
[0038] Regarding the method of grouting, asFigure 1 and Figure 3 as shown in
[0039] An opening is provided on the side wall of the second sleeve 300; a sliding sleeve 310 is sleeved inside the second sleeve 300; the sliding sleeve 310 is arranged at the opening; a screw 311 is provided on the side wall of the sliding sleeve 310; a retaining ring 312 is provided at the corresponding position of the push rod 420 and the screw 311; the screw 311 is clamped with the upper surface of the retaining ring 312.
[0040] Specifically, when grouting mortar, the screw 311 is removed. At this time, the sliding sleeve 310 will move downward, so that the opening on the side wall of the second sleeve 300 is exposed, and the mortar is poured into the storage device 400 through an external grouting device; after the grouting is completed, the sliding sleeve 310 is lifted, and the screw 311 is screwed in until the end of the screw 311 is clamped with the upper surface of the retaining ring 312, so as to close the opening of the storage device 400.
[0041] As Figure 1 and Figure 2 as shown in, the conveying device 200 further includes a guiding cylinder 250 and a guiding block 260 slidably connected to the guiding cylinder 250; the upper part of the guiding cylinder 250 abuts against the base of the motor 210, and the lower part is sleeved with the intermediate joint 500; the guiding block 260 is arranged below the nut seat 230 and sleeved with the thrust rod 240.
[0042] Specifically, due to the large size of this tool, the accuracy of controlling the movement of the push rod 420 by the cooperation of the lead screw 220 and the nut seat 230 alone cannot be guaranteed, and the push rod 420 may be inclined, and the bottom of the storage device 400 is not tightly sealed. Therefore, the guiding cylinder 250 and the guiding block 260 are arranged in the conveying device 200. With the cooperation of the guiding cylinder 250 and the guiding block 260, the movement accuracy of the nut seat 230 is improved, so that the plug 410 is more tightly connected to the second sleeve 300.
[0043] Preferably, a limit switch is provided on the inner wall of the guiding cylinder 250.
[0044] Specifically, since this tool is applied at the bottom of the well and it is impossible to observe whether the storage device 400 is opened and the motor 210 is turned off in time, a limit switch is provided on the inner wall of the guiding cylinder 250. The position of the limit switch is set according to the stroke required for the plug 410 to be completely separated from the second sleeve 300. When the guiding block 260 moves downward with the nut seat to the corresponding position, it will touch the limit switch, and the limit switch will turn off the motor 210.
[0045] As Figure 1 as shown in, it further includes an upper joint 600; the upper joint 600 is arranged on the upper part of the first sleeve 100; a conductor 610 is provided on the upper part of the upper joint 600; the lower part of the conductor 610 is connected to the motor 210.
[0046] Specifically, the upper joint 600 is connected to the upper pipe string, and the conductor 610 is connected to an external control device through a circuit inside the upper pipe string to control the operation of the motor 210.
[0047] In addition, as Figure 3 shown, a sealing seat 510 is further provided below the intermediate joint 500; the inner wall of the sealing seat 510 is movably connected to the thrust rod 240; the sealing seat 510 is threadedly connected to the intermediate joint 500.
[0048] Specifically, the sealing seat 510 is provided below the intermediate joint 500, which can effectively prevent the grout from overflowing outside the second casing 300 and polluting the conveying device 200 during the process of putting this tool into the well.
[0049] Preferably, multiple groups of sealing rings are provided at each connection of this device to improve the sealing performance of the connections, avoiding the pollution of the grout by the well fluid and also preventing the leakage of the grout.
[0050] The present invention has at least the following beneficial effects:
[0051] During the process of lowering this tool into the well, the grout is located in the storage device 400, effectively isolating the pollution of the grout by the well fluid, and the grout is continuously stirred by the spiral blade 440 to prevent the grout from caking and solidifying due to heat; a limit switch is provided in the guide cylinder 250, and when the plug 410 is completely separated from the second casing 300, the motor 210 can be immediately turned off to avoid accidents.
[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. An underground ash injection delivery tool, characterized in that: It includes a conveying device (200) and a storage device (400); The conveying device (200) includes a first sleeve (100), a motor (210), a lead screw (220) connected to the output shaft of the motor (210), a nut seat (230) sleeved on the lead screw (220), and a thrust rod (240) fixedly connected to the lower part of the nut seat (230); The motor (210) is fixedly connected to the inner wall of the first sleeve (100) through a motor base; The storage device (400) includes a second sleeve (300), a plug (410) arranged at the lower part of the second sleeve (300), and a push rod (420) connected to the upper part of the plug (410); The first sleeve (100) is connected to the second sleeve (300) through an intermediate joint (500); The thrust rod (240) is threadedly connected to the push rod (420); The storage device (400) has a first state and a second state; In the first state, the conveying device (200) drives the plug (410) to move upward, so that the second sleeve (300) is fixedly connected to the plug (410); In the second state, the conveying device (200) drives the plug (410) to move downward, so that the second sleeve (300) is separated from the plug (410).
2. The underground ash injection delivery tool according to claim 1, characterized in that: The storage device (400) further includes a power sub-section (430) and a spiral blade (440) sleeved on the push rod (420); The power sub-section (430) can drive the spiral blade (440) to rotate, so that the spiral blade (440) stirs the mortar in the second sleeve (300).
3. The underground ash injection delivery tool according to claim 2, characterized in that: An opening is provided on the side wall of the second sleeve (300).
4. The underground ash injection delivery tool according to claim 3, characterized in that: A sliding sleeve (310) is sleeved inside the second sleeve (300); The sliding sleeve (310) is arranged at the opening; Screws (311) are provided on the side wall of the sliding sleeve (310); A retaining ring (312) is provided at the corresponding position of the push rod (420) and the screws (311); The screws (311) are clamped with the upper surface of the retaining ring (312).
5. The underground ash injection delivery tool according to claim 4, characterized in that: The conveying device (200) further includes a guide cylinder (250) and a guide block (260) slidably connected to the guide cylinder (250); The upper part of the guide cylinder (250) abuts against the motor (210) base, and the lower part is sleeved on the intermediate joint (500); The guide block (260) is arranged at the lower part of the nut seat (230) and is sleeved on the thrust rod (240).
6. The underground ash injection delivery tool according to claim 5, characterized in that: A limit switch is provided on the inner wall of the guide cylinder (250).
7. The underground ash injection delivery tool according to claim 8, characterized in that: It further includes an upper joint (600); The upper joint (600) is arranged at the upper part of the first sleeve (100); A conductor (610) is provided on the upper part of the upper joint (600); The lower part of the conductor (610) is connected to the motor (210).
8. The underground ash injection delivery tool according to claim 7, characterized in that: A sealing seat (510) is further provided at the lower part of the intermediate joint (500); The inner wall of the sealing seat (510) is movably connected to the thrust rod (240); The sealing seat (510) is threadedly connected to the intermediate joint (500).
9. The downhole cement injection and delivery tool according to claim 8, wherein: Multiple sets of sealing rings are provided at each connection of the present device.