CN112682094A - Support device for coal seam gas extraction drilling and use method thereof - Google Patents
Support device for coal seam gas extraction drilling and use method thereof Download PDFInfo
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- CN112682094A CN112682094A CN202110208779.6A CN202110208779A CN112682094A CN 112682094 A CN112682094 A CN 112682094A CN 202110208779 A CN202110208779 A CN 202110208779A CN 112682094 A CN112682094 A CN 112682094A
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Abstract
The invention discloses a supporting device for coal bed gas extraction drilling and a use method thereof, wherein the supporting device for coal bed gas extraction drilling comprises a bracket main body and an elastic supporting leg mechanism, the elastic supporting leg mechanism comprises at least two supporting legs hinged on the bracket main body, the bracket main body is provided with an accommodating groove for accommodating the supporting legs, and each supporting leg is provided with an elastic piece for controlling the supporting leg to pop out the accommodating groove to support drilling and a non-return assembly for preventing the supporting leg from retracting into the accommodating groove after popping out; the use method of the support device for the coal seam gas extraction drill hole comprises the following steps: the stabilizer blade is contracted in accomodating the inslot, promotes the support main part and advances to make the support main part by open closed drill bit in going down to drilling in, the stabilizer blade outwards pops out the support drilling by accomodating the groove, and the non return subassembly is arranged in and is accomodate the groove outside. The invention can effectively support the drilled hole and prevent hole collapse. The support drill hole is suitable for being used in coal seam gas extraction drill holes and used for supporting the drill holes.
Description
Technical Field
The invention belongs to the technical field of coal seam gas extraction drilling, and particularly relates to a supporting device for a coal seam gas extraction drilling hole and a using method thereof.
Background
Unstable gas extraction drill hole of the high-gas soft coal seam is one of the difficult problems restricting the high-efficiency gas extraction. In a high gas soft coal bed with the characteristics of soft coal quality, broken coal rock, poor coal bed air permeability and the like, the phenomena of unqualified drilling depth of a gas extraction drill hole, unstable hole forming, easy hole shrinkage deformation and even hole collapse of the drill hole and the like often occur, the gas extraction rate is greatly reduced, the engineering progress is severely limited, the gas treatment effect is not obvious, and the safety production of a coal mine is seriously influenced.
The mode that often adopts full-length screen pipe guard hole among the prior art improves the stability that drilling supported, and this kind of structure includes sets up in the screen pipe front end and hangs the body, hangs to be equipped with on the body and hangs the fin, hangs the fin and sets up for two relatively and can outwards pop out and retract from hanging the body. When the drilling operation is carried out, go into the screen pipe that is connected and hang the body in open and close formula drill bit under, hang the fin this moment and be in the contraction state because the spacing of cover tube inner wall, when putting to the drill bit position down, push up the three "petal" shape of drill bit central authorities under the effect of axial thrust, the drilling bottom is put under the interior through-hole of gas drainage screen pipe through the drill bit, the screen pipe drives and hangs the body and transfer to the hole bottom, hang the fin alright open and go out certain support to the drilling in the card income pore wall. Although this kind of mode can realize the support location to drilling to a certain extent, but at in-service use, because hang the fin and utilize torsional spring coupling to hang popping out and retracting in order to realize hanging the fin in the body usually, make to pop out the back and hang the fin and hang the holding power in drilling limited, make the original suspension fin that is in the pop-up state shrink back and hang this internal under the torsional spring elastic force effect because of the deformation of drilling easily, can't play effectual supporting role in drilling, cause the hole phenomenon of collapsing, influence gas drainage work.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a supporting device for a coal bed gas extraction drill hole and a using method thereof, so as to achieve the purposes of effectively supporting the drill hole and preventing hole collapse.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a soft coal seam gas is taken out and is adopted strutting arrangement, includes support subject and elasticity stabilizer blade mechanism, and elasticity stabilizer blade mechanism includes that at least two articulate the stabilizer blade in support subject, offers the groove of accomodating that is used for holding the stabilizer blade in the support subject, is equipped with on every stabilizer blade to be used for controlling the stabilizer blade to pop out the elastic component who accomodates the groove support drilling and be used for preventing to pop out the back return subassembly that the groove was accomodate in the foot retraction.
As the limitation of the invention, each support leg is provided with a check hole for accommodating the check assembly, and the check assembly comprises a first connecting rod and a second connecting rod which are fixedly connected through a spring.
As another limitation of the present invention, the elastic member is a spring plate, and two support legs symmetrically arranged along the circumferential direction are connected through the spring plate.
As a further limitation of the invention, at least one group of elastic support leg mechanisms are sequentially arranged at intervals along the axial direction of the bracket main body, and each group of elastic support leg mechanisms comprises a plurality of support legs which are symmetrically arranged along the circumferential direction.
As still further limitation of the present invention, the legs of the adjacent sets of resilient leg mechanisms are circumferentially staggered with respect to the stent body.
As a further limitation of the present invention, the front end of the holder body is a boss, and the rear end is a groove.
The invention also provides a use method of the support device for the coal seam gas extraction borehole, which is realized by using the support device for the coal seam gas extraction borehole, and the technical scheme is as follows: a use method of a support device for soft coal seam gas extraction is realized by matching the support device for soft coal seam gas extraction with an open-close type drill bit, and comprises the following steps: the stabilizer blade is contracted in accomodating the inslot, promotes the support main part and advances to make the support main part by open closed drill bit in going down to drilling in, the stabilizer blade outwards pops out the support drilling by accomodating the groove, and the non return subassembly is arranged in and is accomodate the groove outside.
As the limitation of the invention, the support legs are contracted in the accommodating grooves, the non-return assemblies are contracted in the non-return holes, the support main body is pushed to move in the opening-closing type drill bit to enable the support main body to be lowered into the drill hole from the opening-closing type drill bit, the spring pieces drive the support legs to outwards pop out of the accommodating grooves to support the drill hole, and the non-return assemblies pop out of the non-return holes and are arranged outside the accommodating grooves.
Due to the adoption of the technical scheme, compared with the prior art, the use method of the support device for the coal seam gas extraction drill hole has the following beneficial effects:
(1) according to the support, the non-return assembly is arranged on the support main body, when the support leg is popped out and supported in the drill hole, the non-return assembly is in an open state and is arranged between the support leg and the support main body, when the support leg rotates towards the accommodating groove, the support leg is limited by the non-return assembly to be clamped outside the accommodating groove, the support leg supported in the drill hole is effectively prevented from shrinking and recovering the accommodating groove, the support leg is effectively supported in the drill hole, the drill hole is prevented from collapsing, and the smooth gas extraction work is ensured.
(2) The structure of the non-return assembly can ensure that the non-return assembly is also stored in the support leg in a contraction state when the support leg is contracted in the storage groove, and can ensure that the non-return assembly is in an opening state and is arranged outside the storage groove when the support leg is in a popup state to support drilling, thereby ensuring the use reliability of the whole structure.
(3) According to the invention, the elastic support leg mechanisms are arranged at intervals along the axis, and the supporting effect of the support legs can be improved by combining the mode that the adjacent elastic support leg mechanisms are arranged in a staggered manner in the circumferential direction, so that the hole collapse phenomenon is effectively prevented.
The support drill hole is suitable for being used in coal seam gas extraction drill holes and used for supporting the drill holes.
Drawings
The invention is described in further detail below with reference to the figures and the embodiments.
Fig. 1 is a schematic structural view of a supporting leg retracted in a receiving groove according to embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of the embodiment 1 of the present invention when the supporting leg is ejected;
FIG. 3 is a schematic structural view of a check assembly according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of the check assembly of example 2 of the present invention in a retracted position;
fig. 5 is a schematic view of the check assembly of example 2 of the present invention in an open position.
In the figure: 1. a stent body; 2. a support leg; 3. a receiving groove; 4. a spring plate; 5. a non-return hole; 6. a spring; 7. a first link; 8. a second link; 9. an open-close type drill.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the description of the preferred embodiment is only for purposes of illustration and understanding, and is not intended to limit the invention.
This embodiment is through setting up the non return subassembly on stabilizer blade 2, when stabilizer blade 2 pops out the drilling and supports, can prevent effectively that stabilizer blade 2 from contracting to retrieve and accomodate groove 3, fixes the support position of stabilizer blade 2 to play effectual supporting role to the drilling.
As shown in fig. 1 to 3, the present embodiment includes a bracket body 1, an elastic leg mechanism and a check assembly.
Support main part 1 is the cylinder, and the preceding tip of support main part 1 is equipped with round platform shape boss, and support main part 1 rear end is seted up flutedly to the transportation and the transfer of support main part 1 are convenient for. The support main body 1 is provided with at least one group of elastic support leg mechanisms at intervals along the axial direction in sequence, and two groups of elastic support leg mechanisms are arranged along the axial direction of the support main body 1 in the embodiment.
The resilient leg mechanism is used to control the ejection and retraction of the legs 2. Each group of elastic support leg mechanisms comprises support legs 2 and elastic pieces. Every group elasticity stabilizer blade mechanism is equipped with at least two along 1 circumference symmetry settings of support main part, articulate stabilizer blade 2 on support main part 1, and every group elasticity stabilizer blade mechanism includes four stabilizer blades 2 along 1 circumference symmetry settings of support main part in this embodiment, and stabilizer blade 2 sets up in 1 circumference of support main part in the adjacent group elasticity stabilizer blade mechanism is crisscross. Correspond every stabilizer blade 2 on the support main part 1 and have all seted up and have accomodate groove 3, accomodate groove 3 and be used for accomodating the stabilizer blade 2 that is in the contraction state. Each support leg 2 is provided with an elastic part for controlling the support leg 2 to pop out of the accommodating groove 3 to support the drilling hole, the elastic part is a spring piece 4 in the embodiment, and the two support legs 2 symmetrically arranged along the circumferential direction of the bracket main body 1 are connected through the spring piece 4.
All be equipped with the non return hole 5 that is used for holding the non return subassembly on every stabilizer blade 2, be equipped with in the non return hole 5 and be used for preventing to pop out the back stabilizer blade 2 shrink and retrieve the non return subassembly of accepting groove 3. The non return subassembly includes first connecting rod 7, the second connecting rod 8 through the fixed linking to each other of spring 6, and the one end of spring 6 links to each other with first connecting rod 7 is fixed promptly, and the other end of spring 6 links to each other with second connecting rod 8 is fixed, and the axis of first connecting rod 7, spring 6 and second connecting rod 8 is coaxial with non return hole 5. The retracted position of the non-return assembly corresponds to the retracted position of the foot 2 and the open position of the non-return assembly corresponds to the ejected position of the foot 2.
The method of use of this example is shown in example 2.
The embodiment is implemented by using the supporting device for coal seam gas extraction drilling in embodiment 1 in cooperation with an open-close type drill bit, and includes the following steps:
as shown in fig. 4, the support device for coal seam gas extraction drilling is placed into an open-close type drill bit 9, and the support legs 2 are retracted into the accommodating grooves 3 in the support main body 1 under the restriction of the inner wall of the open-close type drill bit 9; and limited by the receiving groove 3, the check assembly spring 6 is in a contracted state, so that the first connecting rod 7, the spring 6 and the second connecting rod 8 are limited in the check hole 5 of the supporting leg 2, i.e. the contracted position of the check assembly corresponds to the contracted position of the supporting leg 2.
The holder body 1 is pushed to advance toward the front end of the open/close type drill bit 9 in the open/close type drill bit 9, and the holder body 1 pushes the front end of the open/close type drill bit 9 open, so that the holder body 1 is separated from the open/close type drill bit 9 and is lowered into the drilled hole, as shown in fig. 5. Under the effect of the spring piece 4, the support leg 2 is driven to outwards pop out of the accommodating groove 3 to support the drill hole, meanwhile, the spring 6 of the check assembly is separated from the limit of the accommodating groove 3 to restore the free state, so that the total length of the first connecting rod 7, the spring 6 and the second connecting rod 8 is greater than the axial length of the check hole 5, the first connecting rod 7 and the second connecting rod 8 extend outwards of the check hole 5 and are arranged outside the accommodating groove 3, and the check assembly is located at the opening position at the moment. When stabilizer blade 2 when receiving groove 3 shrink, the non return subassembly is placed stabilizer blade 2 card in and is received groove 3 outsides, and the rotation of stabilizer blade 2 is limited, prevents that stabilizer blade 2 shrink from retrieving and receiving in the groove 3.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a soft coal seam gas is taken out and is adopted supporting device which characterized in that: including support subject and elasticity stabilizer blade mechanism, elasticity stabilizer blade mechanism includes that at least two articulate the stabilizer blade in support subject, offers the groove of accomodating that is used for holding the stabilizer blade in the support subject, is equipped with on every stabilizer blade to be used for controlling the stabilizer blade to pop out the elastic component who accomodates the groove support drilling and be used for preventing to pop out the back return subassembly that the groove was accomodate in the foot retraction.
2. The soft coal seam gas pumping support device according to claim 1, characterized in that: a check hole used for containing the check assembly is formed in each support leg, and the check assembly comprises a first connecting rod and a second connecting rod which are fixedly connected through springs.
3. The support device for gas extraction in the soft coal seam according to claim 1 or 2, characterized in that: the elastic component is a spring piece, and the two support legs symmetrically arranged along the circumferential direction are connected through the spring piece.
4. The soft coal seam gas pumping support device according to claim 3, characterized in that: at least one group of elastic support leg mechanisms are sequentially arranged along the axial direction of the support main body at intervals, and each group of elastic support leg mechanisms comprises a plurality of support legs which are symmetrically arranged along the circumferential direction.
5. The soft coal seam gas pumping support device according to claim 4, characterized in that: the supporting legs in the adjacent groups of elastic supporting leg mechanisms are arranged in a staggered mode in the circumferential direction of the support main body.
6. The support device for gas extraction in the soft coal seam according to claim 4 or 5, characterized in that: the front end part of the bracket main body is a boss, and the rear end part is a groove.
7. A use method of a support device for gas drainage of a soft coal seam is characterized by comprising the following steps: the method is realized by using the soft coal seam gas extraction device of claims 1-6 and matching a support device with an open-close type drill bit, and comprises the following steps: the stabilizer blade is contracted in accomodating the inslot, promotes the support main part and advances to make the support main part by open closed drill bit in going down to drilling in, the stabilizer blade outwards pops out the support drilling by accomodating the groove, and the non return subassembly is arranged in and is accomodate the groove outside.
8. The use method of the support device for gas extraction in the soft coal seam according to claim 7, characterized by comprising the following steps: the stabilizer blade is contracted in accomodating the inslot, and the non return subassembly is contracted in the non return downthehole, promotes the support main part and advances to making the support main part by switching formula drill bit in to drilling, and the spring leaf drives the stabilizer blade and outwards pops out the support drilling by accomodating the groove, and the non return subassembly pops out the non return hole and places in and accomodate the groove outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110208779.6A CN112682094A (en) | 2021-02-25 | 2021-02-25 | Support device for coal seam gas extraction drilling and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110208779.6A CN112682094A (en) | 2021-02-25 | 2021-02-25 | Support device for coal seam gas extraction drilling and use method thereof |
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| Publication Number | Publication Date |
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| CN112682094A true CN112682094A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110208779.6A Pending CN112682094A (en) | 2021-02-25 | 2021-02-25 | Support device for coal seam gas extraction drilling and use method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123755A (en) * | 2021-05-10 | 2021-07-16 | 盐城市崇达石化机械有限公司 | Double-acting packer for oil well pipeline |
| CN113279706A (en) * | 2021-07-12 | 2021-08-20 | 中原工学院 | Branch wall pipe for coal seam drilling and coal seam gas extraction system using same |
| CN116066169A (en) * | 2023-03-10 | 2023-05-05 | 国家能源集团乌海能源有限责任公司 | Gas extraction device and gas extraction method |
-
2021
- 2021-02-25 CN CN202110208779.6A patent/CN112682094A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123755A (en) * | 2021-05-10 | 2021-07-16 | 盐城市崇达石化机械有限公司 | Double-acting packer for oil well pipeline |
| CN113279706A (en) * | 2021-07-12 | 2021-08-20 | 中原工学院 | Branch wall pipe for coal seam drilling and coal seam gas extraction system using same |
| CN113279706B (en) * | 2021-07-12 | 2023-09-22 | 中原工学院 | Supporting wall pipe for coal bed drilling and coal bed gas extraction system using same |
| CN116066169A (en) * | 2023-03-10 | 2023-05-05 | 国家能源集团乌海能源有限责任公司 | Gas extraction device and gas extraction method |
| CN116066169B (en) * | 2023-03-10 | 2024-03-26 | 国家能源集团乌海能源有限责任公司 | Gas extraction device and gas extraction method |
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