CN211549644U - Gas drainage well drilling is with footpath sleeve pipe well cementation and is sealed stagnant water connecting device - Google Patents
Gas drainage well drilling is with footpath sleeve pipe well cementation and is sealed stagnant water connecting device Download PDFInfo
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- CN211549644U CN211549644U CN202020062951.2U CN202020062951U CN211549644U CN 211549644 U CN211549644 U CN 211549644U CN 202020062951 U CN202020062951 U CN 202020062951U CN 211549644 U CN211549644 U CN 211549644U
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Abstract
The utility model discloses a gas drainage drilling is with footpath sleeve pipe well cementation seals stagnant water connecting device, including vertical setting and for the body of pipe, the body is by the last connection interface section that sets gradually from the top down, the whirl section, fill the section and connect the interface section down, go up the connection interface section and be used for connecting rather than the real pipeline section of coaxial setting, the equipartition has a plurality of whirl holes that run through its lateral wall in the whirl section periphery, it is filled with the cement stopper to fill section internal seal, be equipped with on its periphery and be used for meeting water from sealed the counterbalance of the back and the wall of a well after expanding and block the supporting component of fluid downward flow, connect the interface section down and be used for connecting rather than the coaxial screen pipe that sets up. The advantages are that: the casing can be well ensured to be put down to a designated position, the quality of sealing and water stopping of the casing well cementing of the same-diameter casing is ensured, the strength of the casing pipe in the well drilling is further increased, the well drilling or well repairing is convenient and quick, the casing pipe lowering, well cementing and sealing and water stopping operation of the same-diameter casing can be completed at one time, and the well completion of the mine gas extraction well drilling is put into use as soon as possible.
Description
Technical Field
The utility model relates to a well drilling technical field, in particular to gas drainage well drilling is with footpath sleeve pipe well cementation sealing water connecting device.
Background
With the gradual advance of the state to the work of removing capacity and inventory in the coal industry, a large amount of coal mines are shut down and abandoned, but some high-gas mines adopt ground construction drilling to extract gas for power generation, key technologies and processes for comprehensively treating the gas in the abandoned mines are explored and established, so that the method has the advantages of improving the coal mine safety, protecting the atmospheric environment, increasing new economic growth points, realizing multiple economic and social benefits of new energy development and utilization, energy conservation and emission reduction and the like.
At present, gas extraction wells are completed in a conventional multipath multistage sleeve mode, after a waste high-gas mine extracts gas for a period of time, due to the ground subsidence induced by a goaf and the action of formation pressure, a drilling inner sleeve is extruded, deformed, bent, dislocated and broken, after the sleeve is broken, an upper water-bearing layer enters the well, the gas concentration is reduced, the drilling cannot be used and scrapped, the drilling service time is short, and the well repairing cost is high; drilling wells which cannot be repaired after being scrapped must be constructed again, so that the input cost is high; more abandoned drilled wells are reduced, the number of the drilled wells is reduced, particularly in winter, the gas concentration is lower, and the equipment cannot normally run to generate electricity, so that great economic loss is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a gas drainage well drilling is with footpath sleeve pipe well cementation seals stagnant water connecting device is provided, the effectual defect of overcoming prior art.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
the utility model provides a gas drainage drilling is with footpath sleeve pipe well cementation seals stagnant water connecting device, including vertical setting and the body that is the pipe, above-mentioned body is by the last connection interface section, whirl section, fill section and the lower connection interface section that set gradually from top to bottom, above-mentioned last connection interface section is used for connecting rather than coaxial real pipeline section that sets up, the equipartition has a plurality of whirl holes that run through its lateral wall on the above-mentioned whirl section periphery, above-mentioned fill section internal seal and pack with the cement stopper, be equipped with on its periphery and be used for meeting water to seal the supporting component who offsets and block fluid downward flow with the wall of a well after expanding certainly, above-mentioned lower connection interface section is used for connecting rather than coaxial screen pipe that sets up.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the inner wall of the upper connecting interface section is provided with a thread female screw.
Further, the periphery of the lower connecting interface section is provided with a thread male screw.
Furthermore, the swirl holes are provided with a plurality of layers, each layer is provided with a plurality of swirl holes, the swirl holes are uniformly distributed at intervals along the circumferential direction of the swirl section, and the swirl holes of two adjacent layers are arranged in a staggered manner.
Furthermore, the support components are provided with a plurality of groups and are arranged on the periphery of the filling section at intervals along the axial direction.
Further, each group of the supporting components comprises a plurality of water-absorbing expansion rubber rings and a supporting piece, the supporting pieces are fixed on the periphery of the filling section, the water-absorbing expansion rubber rings are of an upward flaring umbrella-shaped structure, and the plurality of water-absorbing expansion rubber rings are sleeved on the periphery of the filling section in an up-and-down overlapped mode and supported at the upper end of the supporting pieces.
Further, the supporting member is a reinforcing ring and is fixedly sleeved on the periphery of the filling section.
The utility model has the advantages that: the casing pipe sealing and water stopping device has the advantages that the structural design is reasonable, the casing pipe can be well guaranteed to be placed at a specified position, the quality of a sealed water stopping solid pipe section for well cementation of the casing pipe with the same diameter is guaranteed, the strength of the casing pipe in a drilling well is further improved, the drilling well or the well repairing is convenient and rapid, the pipe placing, well cementation and water stopping operation of the casing pipe with the same diameter can be completed at one time, and the well completion of the gas extraction drilling.
Drawings
FIG. 1 is a schematic structural view of the gas extraction well drilling same-diameter casing cementing closed water-stop connecting device of the utility model;
fig. 2 is the utility model discloses a gas drainage well drilling is with footpath sleeve pipe well cementation seals the schematic structure of stagnant water connecting device when using.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a pipe body, 2, a solid pipe section, 3, a sieve pipe, 11, an upper connecting interface section, 12, a cyclone section, 13, a filling section, 14, a lower connecting interface section, 121, a cyclone hole, 131, a cement plug, 132, a support assembly, 1321, a water-absorbing expansion rubber ring, 1322 and a support.
Detailed Description
The principles and features of the present invention are described below, with the examples being given only for the purpose of illustration and not for the purpose of limiting the scope of the invention.
Example (b): as shown in fig. 1 and 2, the gas extraction drilling same-diameter casing cementing closed water-stop connection device of the embodiment includes a vertically arranged pipe body 1 which is a circular pipe, the pipe body 1 includes an upper connection interface section 11, a cyclone section 12, a packing section 13 and a lower connection interface section 14 which are sequentially arranged from top to bottom, the upper connection interface section 11 is used for connecting a solid pipe section 2 which is coaxially arranged with the upper connection interface section 11, a plurality of cyclone holes 121 which penetrate through the side wall of the cyclone section 12 are uniformly distributed on the periphery of the cyclone section 12, a cement plug 131 is hermetically filled in the packing section 13, a support component 132 which is used for sealing and abutting against the well wall after self-expansion when encountering water and blocking the downward flow of fluid is arranged on the periphery of the packing section 13, and the lower connection interface section 14 is used for connecting a sieve pipe 3 which is coaxially arranged with the.
When in use, as shown in fig. 2, the following is concrete:
the first step is as follows: a same-diameter steel pipe (the diameter of the casing pipe is generally phi 177.8 multiplied by 8.05mm or other types of petroleum casing pipes can be selected, and the specific length is determined according to the well diameter of a drilling well) is taken to be 2500 mm;
the second step is that: the lower half part (filling section 13) in the steel pipe (namely the pipe body 1) is poured with cement paste (a prefabricated cement plug 131) in advance, and the cement plug 131 is reinforced after waiting for setting for at least more than 48 hours;
the third step: spirally cutting a plurality of circular holes (spiral flow holes 121) with the diameter of 20mm along the steel pipe body on the upper half part of the steel pipe (pipe body 1);
the fourth step: and assembling a supporting component 132 at the lower half part of the outer part of the steel pipe, and finishing the manufacturing of the device.
After the device is manufactured, no matter re-drilling or well repairing is carried out, after an extraction well is drilled to the bottom of a hole, a sieve tube 3 (which has the same diameter as the device and is used for extracting gas well sections) is firstly put in, after the sieve tube 3 with the same diameter is put in, the lower connecting interface section 14 is connected, the upper connecting interface section 11 is connected with a solid pipe section with the same diameter, after the pipe body 1 is put at the bottom of the hole, a hole opening is connected with a grouting pump for injecting a certain amount of cement slurry (ensuring that annular clearance cement between the outer wall of the sleeve and the wall of the hole or the sleeve is completely filled), the slurry enters from the pipe body 1, the slurry is pumped to the prefabricated cement plug 131 of the device by the grouting pump and is uniformly pressed to the outer wall of the pipe body 1 through a swirl hole 121, the outer wall of the device is provided with a support component 132 for supporting (preventing the cement slurry from flowing downwards to a goaf and a coal seam and blocking a gas passage on the outer, and (3) returning the cement slurry out of the wellhead from the outer wall of the pipe body 1, removing the wellhead grouting device when the grouting pump is suppressed for hours (stopping waiting for initial setting of the cement slurry) or no pressure, drilling down and completely sweeping the device to prefabricate the cement plug 131 after well cementation and waiting for setting for 72 hours, completing the drilling construction, and installing the wellhead device to perform gas extraction operation.
In a preferred embodiment, the inner wall of the upper connection interface section 11 is provided with a female thread.
In this embodiment, the length of the screw nut is 200-250mm, preferably 230mm, which facilitates the quick screw connection with the solid pipe section 2, and of course, the screw nut can be directly welded and fixed with the solid pipe section 2.
In a preferred embodiment, the lower connection interface section 14 is provided with a thread male thread on its outer circumference.
In this embodiment, the thread length of the thread is 200-250mm, preferably 230mm, which facilitates quick thread connection with the screen pipe 3, but of course, the thread length can also be directly welded and fixed with the screen pipe 3.
More specifically, the cement plug 131 is disposed in the lower half (upper portion of the lower connection interface section 14) of the interior of the pipe body 1 within a range of 1000mm in length, and has a length of 800-1200 mm.
In a preferred embodiment, the swirl holes 121 are provided in multiple layers, each layer is provided with a plurality of swirl holes, and the swirl holes 121 of two adjacent layers are arranged in a staggered manner.
In this embodiment, the swirl holes 121 are circular holes having a diameter of about 20 to 25mm, and the number of the circular holes is about 8 to 12, which are arranged in a triangular shape on the pipe body 1 (the cement slurry can flow uniformly under pressure).
In a preferred embodiment, the supporting members 132 are provided in a plurality of sets and are axially spaced apart from each other on the outer periphery of the packing section 13.
In this embodiment, the design of multiunit supporting component 132 makes whole device meet water in the well after can closely with the wall of a well cooperation, plays better jam and cuts off, supporting role, and during the use, supporting component 132 is the best with installing more than three groups.
In a preferred embodiment, each of the support assemblies 132 includes a plurality of water-absorbing expansion rubber rings 1321 and a support member 1322, the support member 1322 is fixed to the outer periphery of the packing section 13, the water-absorbing expansion rubber ring 1321 has an upwardly flared umbrella-shaped structure, and the plurality of water-absorbing expansion rubber rings 1321 are vertically overlapped and sleeved on the outer periphery of the packing section 13 and supported at the upper end of the support member 1322.
In this embodiment, the water-swelling rubber ring 1321 is sized according to the borehole diameter and the outer diameter of the pipe body 1, the water-swelling rubber ring 1321 generally has an inner diameter of 89-190mm, an outer diameter of 110-273mm and a thickness of 5-8mm, and has stretching and swelling functions, and each group of support members 132 comprises 3-5 water-swelling rubber rings 1321; the water-absorbing expansion rubber ring 1321 naturally expands after meeting water in the well drilling, and forms strong frictional resistance with the well wall or the inner wall of the sleeve, so that the supporting force is stronger.
In a preferred embodiment, the supporting member 1322 is a steel ring and is fixedly fitted on the outer circumference of the packing section 13.
In the embodiment, the reinforcing rings are solid round steel bars with the diameter of 8-12mm, are welded, wound and fixed on the steel pipes and are used for fixing the water-swelling rubber rings 1321, and the reinforcing rings are high in structural strength and firm in fixation.
The utility model discloses a gas drainage well drilling is with footpath sleeve pipe well cementation seals stagnant water connecting device has following beneficial effect: 1) the damage of ground subsidence and formation pressure to the well drilling is effectively relieved, and the service life of the well drilling is prolonged; 2) the device avoids the difficulty of repairing the well, and can quickly and conveniently process accident well drilling; 3) the sealing agent can be processed by local materials on the construction site, is simple and easy to implement, and has good sealing, cementing and water stopping effects; 4) the drilling task can be quickly completed, the production is put into operation, the cost is saved, and the benefit is created.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. The utility model provides a gas drainage drilling is with footpath sleeve pipe well cementation seals stagnant water connecting device which characterized in that: including vertical setting and be body (1) of pipe, body (1) is by last connection interface section (11), whirl section (12), packing section (13) and lower connection interface section (14) that set gradually from the top down, go up connection interface section (11) and be used for connecting real pipe section (2) rather than coaxial setting, the equipartition has a plurality of whirl holes (121) that run through its lateral wall in whirl section (12) periphery, packing section (13) inside seal is filled with cement stopper (131), is equipped with on its periphery to be used for meeting water from sealed counterbalance and block fluid downwardly flowing's supporting component (132) with the wall of a well after the inflation, connection interface section (14) are used for connecting rather than coaxial setting sieve pipe (3).
2. The gas extraction drilling same-diameter casing cementing closed water-stop connecting device according to claim 1, characterized in that: and a threaded female thread is arranged on the inner wall of the upper connecting interface section (11).
3. The gas extraction drilling same-diameter casing cementing closed water-stop connecting device according to claim 1, characterized in that: the periphery of the lower connecting interface section (14) is provided with a thread male screw.
4. The gas extraction drilling same-diameter casing cementing closed water-stop connecting device according to claim 1, characterized in that: the swirl holes (121) are provided with a plurality of layers, each layer is provided with a plurality of swirl holes, the swirl holes are uniformly distributed at intervals along the circumferential direction of the swirl section (12), and the swirl holes (121) on two adjacent layers are arranged in a staggered manner.
5. The gas extraction drilling same-diameter casing cementing closed water-stop connecting device according to any one of claims 1 to 4, characterized in that: the support assemblies (132) are provided with a plurality of groups and are arranged on the periphery of the filling section (13) at intervals along the axial direction.
6. The gas extraction drilling same-diameter casing cementing closed water-stop connecting device according to claim 5, characterized in that: each group of support assembly (132) comprises a plurality of water-absorbing expansion rubber rings (1321) and a support member (1322), the support member (1322) is fixed on the periphery of the stuffing section (13), the water-absorbing expansion rubber rings (1321) are of an upward flaring umbrella-shaped structure, and the plurality of water-absorbing expansion rubber rings (1321) are vertically overlapped and sleeved on the periphery of the stuffing section (13) and are supported at the upper end of the support member (1322).
7. The gas extraction drilling same-diameter casing cementing closed water-stop connecting device according to claim 6, characterized in that: the supporting piece (1322) is a steel bar ring and is fixedly sleeved on the periphery of the filling section (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020062951.2U CN211549644U (en) | 2020-01-13 | 2020-01-13 | Gas drainage well drilling is with footpath sleeve pipe well cementation and is sealed stagnant water connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020062951.2U CN211549644U (en) | 2020-01-13 | 2020-01-13 | Gas drainage well drilling is with footpath sleeve pipe well cementation and is sealed stagnant water connecting device |
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| Publication Number | Publication Date |
|---|---|
| CN211549644U true CN211549644U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020062951.2U Expired - Fee Related CN211549644U (en) | 2020-01-13 | 2020-01-13 | Gas drainage well drilling is with footpath sleeve pipe well cementation and is sealed stagnant water connecting device |
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| CN (1) | CN211549644U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771302A (en) * | 2023-08-17 | 2023-09-19 | 太原科技大学 | Umbrella-shaped expansion type bridge plug with plugging structure |
-
2020
- 2020-01-13 CN CN202020062951.2U patent/CN211549644U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771302A (en) * | 2023-08-17 | 2023-09-19 | 太原科技大学 | Umbrella-shaped expansion type bridge plug with plugging structure |
| CN116771302B (en) * | 2023-08-17 | 2023-10-27 | 太原科技大学 | Umbrella-shaped expansion type bridge plug with plugging structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200922 Termination date: 20220113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |