CN111980621A - Polyurethane foam plugging device - Google Patents
Polyurethane foam plugging device Download PDFInfo
- Publication number
- CN111980621A CN111980621A CN201910426740.4A CN201910426740A CN111980621A CN 111980621 A CN111980621 A CN 111980621A CN 201910426740 A CN201910426740 A CN 201910426740A CN 111980621 A CN111980621 A CN 111980621A
- Authority
- CN
- China
- Prior art keywords
- plugging device
- hole
- polyurethane foam
- top cover
- guide block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920005830 Polyurethane Foam Polymers 0.000 title claims abstract description 24
- 239000011496 polyurethane foam Substances 0.000 title claims abstract description 24
- 229920002635 polyurethane Polymers 0.000 claims abstract description 18
- 239000004814 polyurethane Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000008258 liquid foam Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Catching Or Destruction (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of plugging devices, and particularly relates to a polyurethane foam plugging device which comprises a base cover (1) arranged on a base, wherein a through hole (2) connected with a polyurethane storage tank is arranged in the base cover (1), a pulling type plugging device is arranged at the upper end in the through hole (2), a plugging block (8) is arranged at the lower end, the polyurethane foam plugging device is arranged at the upper end of the polyurethane storage tank arranged at the end part of a drawing hole, because the pressure in the storage tank is greater than the external pressure, when in use, the polyurethane storage tank can be communicated with the outside only by pulling a pull rope, the polyurethane flows to the upper end of the base cover to realize the plugging of the drawing hole, the pull rope can extend to a mining well mouth, the polyurethane foam plugging device is beneficial to remote control, and has strong adaptability to working condition environments such as water jacking operation, rich water hole operation and the like, and meanwhile, the polyurethane foam plugging device, the operation is simple.
Description
Technical Field
The invention belongs to the technical field of plugging devices, and particularly relates to a polyurethane foam plugging device.
Background
The polyurethane foam plugging mechanism is an indispensable device for sealing a pumping hole, a water injection hole and a water discharge hole in the exploitation process of shale gas and gas, the traditional plugging method of the pumping hole is generally combined into two plugging and one injection, namely, the innermost end and the outermost end of the pumping hole are plugged by a method, then cement plugging substances or liquid polyurethane foam are injected into a middle closed annular space for plugging, and along with the increase of exploitation depth, the traditional plugging method has the defects that 1. plugging materials need to be conveyed into the plugged holes, and the consumption of polyurethane raw materials is increased due to long-distance conveying; 2. due to deepening of the mining depth, the plugging operability is poor, and the plugging difficulty of the innermost end of the drainage hole is higher; 3. the plugging effect is poor due to remote plugging, and the adaptability to working conditions such as water-pushing operation, water hole-rich operation and the like is poor, so that the pumping and releasing effects of shale gas, gas and the like are greatly weakened.
Disclosure of Invention
In order to effectively solve the problems in the background art, the invention provides a polyurethane foam plugging device, which has the following specific technical scheme:
a polyurethane foam plugging device comprises a base cover (1) arranged on a base, wherein a through hole (2) connected with a polyurethane storage tank is formed in the base cover (1), a pulling type plugging device is arranged at the upper end in the through hole (2), and a plugging block (8) is arranged at the lower end;
preferably, the pull occlusion device comprises: the device comprises a top cover (3), a spring (4) sleeved at the lower end of the top cover (3), a supporting sheet (5) used for pressing the spring (4), and a pulling structure used for supporting the supporting sheet (5); the drawing structure comprises a pull rope (27) penetrating through the hollow structure and two ejector rods (6) hinged with the end parts of the pull rope (27), the ejector rods (6) are abutted in clamping grooves (7) in the inner wall of the through hole (2), and the two ejector rods (6) are upwardly abutted against the support sheet (5);
preferably, the upper end of the through hole (2) is provided with a thread groove (9), and the top cover (3) is installed on the thread groove (9) in a matching manner;
preferably, a coaming (10) is arranged at the upper end of the base cover (1), and the pulling type plugging device comprises a support rod (11) arranged on the inner side wall of the coaming (10), a gear (12) arranged on the support rod (11), a first guide block (13) and a second guide block (14) which are symmetrically arranged on two sides of the gear (12); one end of the first guide block (13) is provided with a first rack (15) matched with the gear (12), the opposite side end of the first guide block is matched with a first sliding groove (16) arranged on the enclosing plate (10), the top end of the first guide block is provided with a buckle ring (17), and a pull rope is wound on the buckle ring (17);
The lower end and the upper end of the side wall of the second guide block (14) are provided with liquid guide holes (14-1), the interior of the second guide block is of a hollow structure, the second guide block (14) is matched with a second sliding groove (18) arranged on the enclosing plate (10), the side end of the second guide block is provided with a second rack (14-2) matched with the gear (12), and the lower end of the second guide block is connected with the plugging block (8);
preferably, the pulling type plugging device comprises a top cover (3-1), a spring (4-1) sleeved at the lower end of the top cover (3-1) and a support sheet (5-1), wherein two ends of the support sheet (5-1) are connected with a thin rope (19), the thin rope (19) penetrates through the top cover (3-1) and is wound on a turntable (20) arranged at the upper end of the top cover (3-1), the turntable (20) is in rotating fit with the top cover (3-1), the center of the top cover (3-1) and the center of the turntable (20) are connected with a positioning block (21), the positioning block (21) is clamped between the top cover (3-1) and the turntable (20), and the upper end of the positioning block is connected with a pull rope; the center of the support sheet (5-1) is of a hollow structure;
preferably, the pull occlusion device comprises: a cover body (22) arranged at the upper end of the through hole (2), a connecting rod structure (23) which is hinged with each other, a spring (24), a positioning rod (25), a push plate (26) and a pull rope; the upper end of the connecting rod structure (23) is buckled in a clamping groove located on the lower end face of the cover body (22), the lower end of the connecting rod structure (23) is hinged to the push plate (26), the spring (24) is fixed on the side wall of the through hole (2) and connected with the hinged end of the connecting rod structure (23), one end of the positioning rod (25) is propped against the side wall of the through hole (2), the other end of the positioning rod (25) is propped against the hinged end pressing spring (24) of the connecting rod structure (23), a pull rope is wound on the positioning rod (25), and the pull rope penetrates through the cover body (22) and extends to the outer;
Preferably, the push plate (26) is connected with the blocking block (8), and the center of the push plate (26) and the center of the cover body (22) are provided with center holes;
preferably, the cover body (22) is in threaded connection with the through hole;
compared with the prior art, the invention has the beneficial effects that: this dress is installed and is being located the polyurethane holding vessel upper end of taking out hole tip setting, because the pressure in the holding vessel is greater than external pressure, when using, only need stimulate the stay cord, can make polyurethane holding vessel and external UNICOM, polyurethane flows upward and realizes the shutoff of taking out the hole to the base lid upper end, and the stay cord is extendible to the well head of exploitation, do benefit to remote control, strong to the adaptability of operating mode environment such as water-logging operation and rich water hole operation, this device simultaneously, small, light in weight, convenient installation, and is easy and simple to handle.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a partial structural view of embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of embodiment 2 of the present invention;
FIG. 4 is a partial schematic view of the structure of embodiment 2 of the present invention;
FIG. 5 is a schematic structural view of embodiment 3 of the present invention;
FIG. 6 is a partial schematic view of the structure of embodiment 3 of the present invention;
fig. 7 is a partial schematic view of the structure of embodiment 4 of the present invention.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments;
example 1
As shown in fig. 1 and 2, a polyurethane foam plugging device comprises a base cover 1 arranged on a base, wherein a through hole 2 connected with a polyurethane storage tank is arranged in the base cover 1, a pulling type plugging device is arranged at the upper end in the through hole 2, and a plugging block 8 is arranged at the lower end; the pull occlusion device comprises: the device comprises a top cover 3, a spring 4 sleeved at the lower end of the top cover 3, a supporting sheet 5 for pressing the spring 4 and a pulling structure for supporting the supporting sheet 5; the drawing structure comprises a pull rope 27 penetrating through the hollow structure and two ejector rods 6 respectively hinged with the end parts of the pull rope 27, the ejector rods 6 are propped in the clamping grooves 7 in the inner wall of the through hole 2, and the two ejector rods 6 prop the support sheet 5 upwards;
the upper end of the through hole 2 is provided with a thread groove 9, and the top cover 3 is arranged on the thread groove 9 in a matching way;
under normal conditions, the ejector rod 6 is supported in the clamping groove 7, the ejector rod is pressed on the ejector rod through the pressing force of the top cover 3, the spring 4 and the support piece 5 from top to bottom, the pull rope extends to a well head, when the device is used, the pull rope is pulled to lift the ejector rod to remove the clamping groove 7, the pull rope is released, the support piece 5 is rapidly moved downwards through the resilience force of the spring, the blocking block 8 is ejected out of the through hole 2, and because the pressure of the polyurethane storage tank is greater than the outside, polyurethane liquid foam is left outside along the through hole of the top cover 3 to be blocked; when the device is installed, the device is installed from bottom to top, the ejector rod 6 is firstly installed and supported in the clamping groove 7, and the spring 4 and the top cover 3 are installed and are pressed to a proper position through the spiral connection of the top cover 3 and the through hole 2.
Example 2
As shown in fig. 3 and 4, a polyurethane foam plugging device comprises a base cover 1 arranged on a base, a through hole 2 connected with a polyurethane storage tank is arranged in the base cover 1, a pulling type plugging device is arranged at the upper end in the through hole 2, and a plugging block 8 is arranged at the lower end; the upper end of the base cover 1 is provided with a coaming 10, and the pulling type plugging device comprises a support rod 11 arranged on the inner side wall of the coaming 10, a gear 12 arranged on the support rod 11, a first guide block 13 and a second guide block 14 which are symmetrically arranged on the two sides of the gear 12; one end of the first guide block 13 is provided with a first rack 15 matched with the gear 12, the opposite side end of the first guide block is matched with a first chute 16 arranged on the enclosing plate 10, the top end of the first guide block is provided with a retaining ring 17, and a pull rope is wound on the retaining ring 17;
the lower end of the second guide block 14 and the upper end of the side wall are provided with liquid guide holes 14-1, the interior of the second guide block is of a hollow structure, the second guide block 14 is matched with a second sliding groove 18 arranged on the enclosing plate 10, the side end of the second guide block is provided with a second rack 14-2 matched with the gear 12, and the lower end of the second guide block is connected with the plugging block 8;
when the polyurethane plugging device is used, the first guide block 13 moves upwards along the first sliding groove 16 through the pull rope, the first guide block 13 moves upwards to drive the gear 12 to rotate, the second guide block 14 moves downwards along the second sliding groove 18, the second guide block 14 moves downwards to push out the plugging block 8, and polyurethane is reserved outside through the liquid guide hole 14-1 of the second guide block 14.
Example 3
As shown in fig. 5 and 6, a polyurethane foam plugging device comprises a base cover 1 arranged on a base, a through hole 2 connected with a polyurethane storage tank is arranged in the base cover 1, a pulling type plugging device is arranged at the upper end in the through hole 2, and a plugging block 8 is arranged at the lower end; the pulling type plugging device comprises a top cover 3-1, a spring 4-1 sleeved at the lower end of the top cover 3-1 and a support sheet 5-1, wherein two ends of the support sheet 5-1 are connected with a thin rope 19, the thin rope 19 passes through the top cover 3-1 and is wound on a turntable 20 arranged at the upper end of the top cover 3-1, the turntable 20 is in running fit with the top cover 3-1, the center of the top cover 3-1 and the turntable 20 is connected with a mounting positioning block 21, the positioning block 21 is clamped between the top cover 3-1 and the turntable 20, and the upper end of the positioning block is connected with a pull rope; the center of the support sheet 5-1 is of a hollow structure;
the support sheet 5-1 is connected to the rotary disc 20 through the string 19, and the string is tightened by rotating the rotary disc 20, so that the support sheet 5-1 presses the spring 4-1;
when the device is used, the positioning block 21 is moved out of the top cover 3 and the rotary table 20 by pulling the pull rope, and the rotary table 20 rotates to discharge the thin rope 19, so that the supporting sheet 5-1 pushes out the plugging block 8 under the action of the spring;
the stay cord can directly extend out of a well mouth, the positioning block 21 can be moved upwards through artificial pulling, as an optimal mode, the stay cord can be connected with a driving device arranged on a base, the pulling of the stay cord is realized through the driving device, a wireless communication module is arranged in the driving device, the device can be driven through the wireless remote control of an outdoor worker, the driving device is an electric, hydraulic or pneumatic telescopic rod, and the end part of the telescopic rod is connected with the stay cord to pull the stay cord.
Example 4
As shown in fig. 7, a polyurethane foam plugging device comprises a base cover 1 arranged on a base, a through hole 2 connected with a polyurethane storage tank is arranged in the base cover 1, a pulling type plugging device is arranged at the upper end in the through hole 2, and a plugging block 8 is arranged at the lower end; the pull occlusion device comprises: a cover body 22 arranged at the upper end of the through hole 2, a connecting rod structure 23, a spring 24, a positioning rod 25, a push plate 26 and a pull rope, wherein the connecting rod structure 23 is hinged with the cover body; the upper end of the connecting rod structure 23 is buckled in a clamping groove on the lower end face of the cover body 22, the lower end of the connecting rod structure 23 is hinged with the push plate 26, the spring 24 is fixed on the side wall of the through hole 2 and is connected with the hinged end of the connecting rod structure 23, one end of the positioning rod 25 is propped against the side wall of the through hole 2, the other end of the positioning rod 25 is propped against the hinged end of the connecting rod structure 23 to compress the spring 24, a pull rope is wound on the positioning rod 25, and the pull rope penetrates through the cover body 22;
the push plate 26 is connected with the plugging block 8, the push plate 26 and the center of the cover body 22 are provided with center holes, and the cover body 22 is in threaded connection with the through holes;
the link structure 23 compresses the spring 24 by the action of the positioning rod 25, and in use, the positioning rod 25 is removed by pulling the pulling rope, and the pushing plate 26 moves downward to push out the plugging block 8 by the action of the external force of the spring 24, and the cover body 22 and the central hole of the pushing plate 26 are used for extruding the polyurethane foam.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the invention.
Claims (8)
1. A polyurethane foam plugging device is characterized in that: including setting up base lid (1) on the base, be equipped with through-hole (2) that are connected with the polyurethane holding vessel in base lid (1), the upper end is equipped with in through-hole (2) and draws formula plugging device that draws, and the lower extreme is equipped with plugging block (8).
2. The polyurethane foam plugging device of claim 1, wherein the pull plugging device comprises: the device comprises a top cover (3), a spring (4) sleeved at the lower end of the top cover (3), a supporting sheet (5) used for pressing the spring (4), and a pulling structure used for supporting the supporting sheet (5); the structure is characterized in that a hollow structure is arranged between the top cover (3) and the support sheet (5), the pulling structure comprises a pull rope (27) penetrating through the hollow structure and two ejector rods (6) hinged to the end portions of the pull rope (27), the ejector rods (6) are abutted to clamping grooves (7) in the inner wall of the through hole (2), and the two ejector rods (6) are upwardly abutted to the support sheet (5).
3. Polyurethane foam plugging device according to claim 2, wherein the upper end of the through hole (2) is provided with a threaded groove (9), and the top cap (3) is fittingly mounted on the threaded groove (9).
4. Polyurethane foam plugging device according to claim 1, wherein a coaming (10) is provided at the upper end of the base cover (1), and the pulling type plugging device comprises a support rod (11) provided on the inner side wall of the coaming (10), a gear (12) mounted on the support rod (11), a first guide block (13) and a second guide block (14) symmetrically mounted on both sides of the gear (12); one end of the first guide block (13) is provided with a first rack (15) matched with the gear (12), the opposite side end of the first guide block is matched with a first sliding groove (16) arranged on the enclosing plate (10), the top end of the first guide block is provided with a retaining ring (17), and a pull rope is wound on the retaining ring (17);
liquid guide holes (14-1) are formed in the lower end of the second guide block (14) and the upper end of the side wall, the inner portion of the second guide block is of a hollow structure, the second guide block (14) is matched with a second sliding groove (18) formed in the enclosing plate (10), a second rack (14-2) matched with the gear (12) is arranged at the side end of the second guide block, and the lower end of the second guide block is connected with the blocking block (8).
5. The polyurethane foam plugging device according to claim 1, wherein the pulling type plugging device comprises a top cover (3-1), a spring (4-1) sleeved at the lower end of the top cover (3-1), and a support sheet (5-1), wherein a string (19) is connected to both ends of the support sheet (5-1), the string (19) is wound on a turntable (20) arranged at the upper end of the top cover (3-1) through the top cover (3-1), the turntable (20) is rotationally matched at the top cover (3-1), the top cover (3-1) is connected with the center of the turntable (20) through a positioning block (21), the positioning block (21) is clamped between the top cover (3-1) and the turntable (20) and is connected with the upper end of the pulling rope; the center of the support sheet (5-1) is of a hollow structure.
6. The polyurethane foam plugging device of claim 1, wherein the pull plugging device comprises: a cover body (22) arranged at the upper end of the through hole (2), a connecting rod structure (23) which is hinged with each other, a spring (24), a positioning rod (25), a push plate (26) and a pull rope; the upper end lock of connecting rod structure (23) is in the draw-in groove that is located terminal surface under lid (22), and the lower extreme and push pedal (26) of connecting rod structure (23) are articulated, spring (24) are fixed on the lateral wall of through-hole (2), and link to each other with the hinged end of connecting rod structure (23), locating lever (25) one end top is held at through-hole (2) lateral wall, and the hinged end hold-down spring (24) at connecting rod structure (23) is held in the other end top, twines the stay cord on locating lever (25), the stay cord passes lid (22) and stretches to the outer end.
7. Polyurethane foam plugging device according to claim 6, wherein the push plate (26) is connected to the plugging block (8), the push plate (26) and the cover body (22) being centrally provided with a central hole.
8. Polyurethane foam plugging device according to claim 6, wherein the cap (22) is screwed to the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426740.4A CN111980621B (en) | 2019-05-22 | 2019-05-22 | Polyurethane foam plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426740.4A CN111980621B (en) | 2019-05-22 | 2019-05-22 | Polyurethane foam plugging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111980621A true CN111980621A (en) | 2020-11-24 |
| CN111980621B CN111980621B (en) | 2024-10-15 |
Family
ID=73437342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910426740.4A Active CN111980621B (en) | 2019-05-22 | 2019-05-22 | Polyurethane foam plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111980621B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1113512A1 (en) * | 1983-01-12 | 1984-09-15 | Всесоюзный Институт По Проектированию Объектов Газовой Промышленности | Device for sealing well |
| CN2706748Y (en) * | 2004-06-16 | 2005-06-29 | 中国矿业大学 | Device for measuring gaspressure by directly drilling and sealing hole in coal seam |
| RU2286438C1 (en) * | 2005-07-07 | 2006-10-27 | Закрытое акционерное общество "Уралнефтегазпром" | Casing annulus plugging method |
| US20090044958A1 (en) * | 2005-05-26 | 2009-02-19 | Hans Alexandersson | Sealing device |
| CN102052087A (en) * | 2010-06-24 | 2011-05-11 | 阜新库乔聚氨酯发展有限公司 | Polyurethane foaming bag blocked gas drainage hole |
| WO2012065295A1 (en) * | 2010-11-15 | 2012-05-24 | 湖南汉寿中煤科技有限公司 | System and method for gas drainage and outburst prevention in coal seam by drill-cut linkage of long drilling hole and high pressure water jet |
| CN102562133A (en) * | 2012-01-16 | 2012-07-11 | 中国矿业大学 | Device and method for sealing and drilling holes of gas drainage |
| CN102619488A (en) * | 2011-01-26 | 2012-08-01 | 北京天海纵横科技有限责任公司 | Hole sealing method for gas drainage drill |
| CN202882989U (en) * | 2012-11-05 | 2013-04-17 | 焦作市新筑王材料科技有限公司 | Coal site synthesized polyurethane foaming bag |
| US20180305996A1 (en) * | 2017-04-25 | 2018-10-25 | Baker Hughes Incorporated | Packers having controlled swelling and methods of manufacturing thereof |
| CN211058765U (en) * | 2019-05-22 | 2020-07-21 | 西安青果新材料科技开发有限公司 | Polyurethane foam plugging device |
-
2019
- 2019-05-22 CN CN201910426740.4A patent/CN111980621B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1113512A1 (en) * | 1983-01-12 | 1984-09-15 | Всесоюзный Институт По Проектированию Объектов Газовой Промышленности | Device for sealing well |
| CN2706748Y (en) * | 2004-06-16 | 2005-06-29 | 中国矿业大学 | Device for measuring gaspressure by directly drilling and sealing hole in coal seam |
| US20090044958A1 (en) * | 2005-05-26 | 2009-02-19 | Hans Alexandersson | Sealing device |
| RU2286438C1 (en) * | 2005-07-07 | 2006-10-27 | Закрытое акционерное общество "Уралнефтегазпром" | Casing annulus plugging method |
| CN102052087A (en) * | 2010-06-24 | 2011-05-11 | 阜新库乔聚氨酯发展有限公司 | Polyurethane foaming bag blocked gas drainage hole |
| WO2012065295A1 (en) * | 2010-11-15 | 2012-05-24 | 湖南汉寿中煤科技有限公司 | System and method for gas drainage and outburst prevention in coal seam by drill-cut linkage of long drilling hole and high pressure water jet |
| CN102619488A (en) * | 2011-01-26 | 2012-08-01 | 北京天海纵横科技有限责任公司 | Hole sealing method for gas drainage drill |
| CN102562133A (en) * | 2012-01-16 | 2012-07-11 | 中国矿业大学 | Device and method for sealing and drilling holes of gas drainage |
| CN202882989U (en) * | 2012-11-05 | 2013-04-17 | 焦作市新筑王材料科技有限公司 | Coal site synthesized polyurethane foaming bag |
| US20180305996A1 (en) * | 2017-04-25 | 2018-10-25 | Baker Hughes Incorporated | Packers having controlled swelling and methods of manufacturing thereof |
| CN211058765U (en) * | 2019-05-22 | 2020-07-21 | 西安青果新材料科技开发有限公司 | Polyurethane foam plugging device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111980621B (en) | 2024-10-15 |
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