CN103615207A - Shaft bottom washing device for coal-bed gas well - Google Patents
Shaft bottom washing device for coal-bed gas well Download PDFInfo
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- CN103615207A CN103615207A CN201310652209.1A CN201310652209A CN103615207A CN 103615207 A CN103615207 A CN 103615207A CN 201310652209 A CN201310652209 A CN 201310652209A CN 103615207 A CN103615207 A CN 103615207A
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- shaft bottom
- bed gas
- mud
- silt
- gas well
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Abstract
The invention relates to a shaft bottom washing device for a coal-bed gas well. The shaft bottom washing device for the coal-bed gas well is composed of an outer oil tube, a diffusion tube, a connecting tube, a nozzle, a spray head and a mud dredger. The mud dredger is composed of mud loosening sheets, guide sheets and a cone-shaped body. The mud dredger is characterized in that the guide sheets are distributed around the cone-shaped body of the mud dredger; the mud loosening sheets are evenly installed on the cone-shaped body; in the process of placing down the oil tube through a wellhead workover rig, the guide sheets make contact with silt to make a rotary head rotate; in the process of going deep into a silt layer of the mud dredger, the mud loosening sheets are folded upwards under the resistance of the silt; in the process of lifting the oil tube through the wellhead workover rig, the bevel edges of the mud loosening sheets are unfolded naturally under the resistance of the silt layer, so that the effect of loosening the silt is achieved. The spray head is characterized in that the periphery of the spray head is provided with spray holes in an annular distribution mode, the spray head acts together with a jet pump master piece to make liquid delivery reach dynamic balance, and therefore it can be guaranteed that the amount of the liquid at the shaft bottom does not change and the pressure at the shaft bottom of the coal-bed gas well does not change either; meanwhile, the spray head coordinates with the mud dredger to make hydraulic washing be combined with mechanical loosening of the silt layer by the mud dredger. The shaft bottom washing device for the coal-bed gas well is reliable in operation process, and capable of effectively improving coal-bed gas well washing efficiency.
Description
Technical field
The present invention relates to a kind of coal bed gas well shaft bottom well washing apparatus, belong to petroleum machinery field.
Background technology
In the process of producing in coal bed gas, the solid particle in coal seam can enter shaft bottom along with output water, after husky mud deposition, can stop up the preforation tunnel of producing zone, causes gas production to decline.According to the needs of engineering, need to carry out well-flushing work.Well washing apparatus is in the past in washing well process, because flushing fluid is to return to ground by the annular space between oil pipe and sleeve pipe, shaft bottom producing fluid level can uprise, cause bottom pressure to increase, it is excessive that coal bed gas well requires bottom pressure not change in washing well process, so well washing apparatus is in the past undesirable.In addition well washing apparatus relies on merely jetting in the past, and the silt of flushing manhole bottom sediments digs husky efficiency not high.
Summary of the invention
The present invention overcomes original well washing apparatus can increase bottom pressure and the simple deficiency that relies on jetting well-flushing efficiency, a kind of coal bed gas well shaft bottom well washing apparatus is provided, this device has machinery and digs function husky and that waterpower is dug husky cooperative work, and can keep shaft bottom producing fluid level constant, realization is in the process of well-flushing, the effect that bottom pressure remains unchanged, has higher efficiency and better applicability.For realizing the above function, the technical solution adopted in the present invention is:
The present invention is a kind of coal bed gas well shaft bottom well washing apparatus, it is characterized in that: well washing apparatus is from top to bottom connected in sequence by outer oil pipe, anemostat, connecting piece, nozzle, shower nozzle, bolt, loose slice, prerotation vane and bullet.Outer oil pipe is connected in connecting piece outside, and anemostat is arranged on outer oil pipe center; Anemostat is connected in connecting piece inside; Nozzle is fixed on connecting piece with bolt, is positioned at anemostat below; Shower nozzle is loaded on connecting piece bottom, sealing connecting piece, and with its formation cavity; Mud dredger consists of loose slice, prerotation vane and bullet, is arranged under shower nozzle, is positioned at the bottommost of well washing apparatus, and mud dredger and shower nozzle can relatively rotate.Bullet is around the prerotation vane that distributing, loose slice is evenly installed on bullet, transferring in Tubing During Running of well head workover rig, prerotation vane contacts with silt and impels bullet to rotate, mud dredger gos deep in silt layer process, and loose slice is upwards packed up under silt resistance, the mentioning in Tubing During Running of well head workover rig, pine slice hypotenuse is opened by the effect of silt layer resistance naturally, plays loosening studies on sediment; Ejecting device surrounding annular spread spray-hole; Connecting piece middle part hoop has circular intake.
Compare with existing equipment, the present invention, owing to adopting above technological means, has the following advantages: the liquid measure 1, being sprayed by shower nozzle is identical with the liquid measure that connecting piece intake sucks, and makes shaft bottom liquid measure reach dynamic equilibrium, realize shaft bottom amount of liquid and remain unchanged, thereby guarantee that bottom pressure is constant.2, shower nozzle hydrodynamic cleaning and mud dredger the machinery loosening acting in conjunction of silt layer, more Rapid Cleaning shaft bottom silt.
Accompanying drawing explanation
Fig. 1 is coal bed gas well of the present invention shaft bottom well washing apparatus structural representation;
Fig. 2 is coal bed gas well of the present invention shaft bottom well washing apparatus operating principle schematic diagram;
Fig. 3 is the structural representation of Figure 1A-A section;
Fig. 4 is the partial enlarged drawing of prerotation vane in Fig. 1;
In figure: 1. outer oil pipe, 2. anemostat, 3. connecting piece, 4. nozzle, 5. shower nozzle, 6. loose slice, 7. prerotation vane, 8. bullet, 9. intake, 10. bolt, 11. spray-holes, 12. kidney type through holes.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described further:
As shown in Figure 1, the present invention relates to a kind of coal bed gas well shaft bottom well washing apparatus, it consists of outer oil pipe 1, anemostat 2, connecting piece 3, nozzle 4, shower nozzle 5, loose slice 6, prerotation vane 7, bullet 8.
As shown in Figure 2, hollow arrow is working fluid trend, filled arrows is mixed soil sand drift body trend after well-flushing, coal bed gas well shaft bottom well washing apparatus flow path of the liquid is: working fluid (hollow arrow) from the annular space chamber of outer tube and central tube flow into by the toroidal cavity I that forms of oil pipe 1 and anemostat 2, the kidney type through hole 12 of connecting piece 3 annular spread of flowing through again, enters into the cavity II that connecting piece 3 and shower nozzle 5 form.Hydraulic fluid is divided into the two-way flow direction after entering cavity II, one road fluid is through a plurality of spray-holes 11 of shower nozzle 5 annular spread, with high velocity jet, impact the silt in shaft bottom, another road is through jet pump nozzle 4 upwards ejection at a high speed, working fluid produces negative pressure when nozzle sprays, the solid-liquid fluid-mixing of cavity III between well washing apparatus and the borehole wall is sucked through intake 9, finally by anemostat 2, central tube, return to ground.Fluid between well washing apparatus and the borehole wall is by shower nozzle 5 ejection working fluids, is being mingled with the earth and the grains of sand (filled arrows) that rinse.
As shown in Figure 2, Figure 4 shows, mud dredger, in the continual conveying of liquid, is driven and is pumped by outer tube by well head workover rig.When bullet 8 is drilled in silt layer downwards, due to the bullet 8 external surfaces prerotation vane 7 angled with vertical direction that distributing, impel whole mud dredger in piercing process, to be rotated counterclockwise certain angle, the loose slice 6 of bullet 8 tops is under the resistance of silt layer simultaneously, upwards draw in (as Fig. 1), reduced the resistance that mud dredger is moved downward.Mud dredger is drilled into after silt layer certain depth, well washing apparatus upwards lifts, pine slice 6 is under the resistance of silt, be rotated down 90 ° and become open configuration (Fig. 2), mud dredger is due to 6 one-tenth open configurations of loose slice simultaneously, and rotational resistance is large especially, in the process of moving upward, can not produce and rotatablely move, in motion up and down repeatedly, mud dredger just can complete the rotation of 360 °, completes the loose sand industry of 360 °.Loosening silt, under the effect of shower nozzle 5 high-velocity fluids, forms silt fluid-mixing, by intake 9, enters into anemostat 2, upwards by central tube, finally sprays go back to ground.
As shown in Figure 1, Figure 3 and Figure 4, the spout of nozzle 4 upward, anemostat 2 heavy caliber ends upward, prerotation vane 7 is distributed in bullet 8 external surfaces, quantity can change according to demand, between nozzle 4 and anemostat 2, by 4 bolts 10, connected, connecting piece 3 inner shafts are to being uniformly distributed 4 kidney type through holes 12, and connecting piece 3 middle parts are radially uniformly distributed four intakes 9.
Claims (4)
1. a coal bed gas well shaft bottom well washing apparatus, is characterized in that: coal bed gas well shaft bottom well washing apparatus is from top to bottom connected in sequence by outer oil pipe (1), anemostat (2), connecting piece (3), nozzle (4), shower nozzle (5), bolt (10), loose slice (6), prerotation vane (7) and bullet (8).Outer oil pipe (1) is connected in connecting piece (3) outside, and anemostat (2) is arranged on outer oil pipe (1) center; Anemostat (2) is connected in connecting piece (3) inside; It is upper that nozzle (4) is fixed on connecting piece (3) with bolt (10), is positioned at anemostat (2) below; Shower nozzle (5) is loaded on connecting piece (3) bottom, sealing connecting piece (3), and with its formation cavity; Mud dredger consists of loose slice (6), prerotation vane (7) and bullet (8), is arranged under shower nozzle (5), is positioned at the bottommost of coal bed gas well shaft bottom well washing apparatus, and mud dredger and shower nozzle (5) can relatively rotate.
2. coal bed gas well according to claim 1 shaft bottom well washing apparatus, it is characterized in that: bullet (8) is around the prerotation vane that distributing (7), the upper loose slice (6) of evenly installing of bullet (8), transferring in Tubing During Running of well head workover rig, prerotation vane (7) contacts with silt and impels bullet (8) to rotate, mud dredger gos deep in silt layer process, pine slice (6) is upwards packed up under silt resistance, mentioning in Tubing During Running of well head workover rig, pine slice (6) hypotenuse is opened by the effect of silt layer resistance naturally, plays loosening studies on sediment.
3. coal bed gas well according to claim 1 shaft bottom well washing apparatus, it is characterized in that: described shower nozzle (5) surrounding annular spread spray-hole (11), described connecting piece (3) middle part has annular intake (9), the liquid measure liquid measure that intake (9) sucks in connecting piece (3) by shower nozzle (5) ejection is identical, make shaft bottom liquid measure reach dynamic equilibrium, realize shaft bottom amount of liquid and remain unchanged, thereby guarantee that bottom pressure is constant.
4. coal bed gas well according to claim 1 shaft bottom well washing apparatus, is characterized in that: the hydrodynamic cleaning of shower nozzle (5) and mud dredger the machinery loosening acting in conjunction of silt layer, more Rapid Cleaning shaft bottom silt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652209.1A CN103615207B (en) | 2013-12-03 | 2013-12-03 | A kind of coal bed gas well shaft bottom well washing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652209.1A CN103615207B (en) | 2013-12-03 | 2013-12-03 | A kind of coal bed gas well shaft bottom well washing apparatus |
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| CN103615207A true CN103615207A (en) | 2014-03-05 |
| CN103615207B CN103615207B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310652209.1A Expired - Fee Related CN103615207B (en) | 2013-12-03 | 2013-12-03 | A kind of coal bed gas well shaft bottom well washing apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967435A (en) * | 2014-05-21 | 2014-08-06 | 西南石油大学 | Coal-bed gas well bottom sand removing device |
| CN109178285A (en) * | 2018-01-25 | 2019-01-11 | 西南石油大学 | A kind of propulsion device and underwater robot for underwater robot |
| CN111335846A (en) * | 2020-04-26 | 2020-06-26 | 罗林峰 | Coal bed gas exploitation well-flushing equipment |
| CN114320195A (en) * | 2022-01-07 | 2022-04-12 | 西安石油大学 | Reversing connector for continuous sand washing and well washing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3993146A (en) * | 1973-08-29 | 1976-11-23 | Continental Oil Company | Apparatus for mining coal using vertical bore hole and fluid |
| CN201567983U (en) * | 2009-12-09 | 2010-09-01 | 中国石油天然气股份有限公司 | Coal bed gas-well bridge type non-pollution continuous coal ash flushing technological pipe column |
| CN202157766U (en) * | 2011-07-28 | 2012-03-07 | 天津市万众科技发展有限公司 | Horizontal well turbine sand removal device |
| CN103388465A (en) * | 2012-05-10 | 2013-11-13 | 中国石油大学(华东) | Downhole device using hydraulic jets of parallel tubes to flush pulverized coal |
| CN103388466A (en) * | 2012-05-10 | 2013-11-13 | 中国石油大学(华东) | Concentric pipe hydraulic jet coal dust washing downhole device |
-
2013
- 2013-12-03 CN CN201310652209.1A patent/CN103615207B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3993146A (en) * | 1973-08-29 | 1976-11-23 | Continental Oil Company | Apparatus for mining coal using vertical bore hole and fluid |
| CN201567983U (en) * | 2009-12-09 | 2010-09-01 | 中国石油天然气股份有限公司 | Coal bed gas-well bridge type non-pollution continuous coal ash flushing technological pipe column |
| CN202157766U (en) * | 2011-07-28 | 2012-03-07 | 天津市万众科技发展有限公司 | Horizontal well turbine sand removal device |
| CN103388465A (en) * | 2012-05-10 | 2013-11-13 | 中国石油大学(华东) | Downhole device using hydraulic jets of parallel tubes to flush pulverized coal |
| CN103388466A (en) * | 2012-05-10 | 2013-11-13 | 中国石油大学(华东) | Concentric pipe hydraulic jet coal dust washing downhole device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967435A (en) * | 2014-05-21 | 2014-08-06 | 西南石油大学 | Coal-bed gas well bottom sand removing device |
| CN109178285A (en) * | 2018-01-25 | 2019-01-11 | 西南石油大学 | A kind of propulsion device and underwater robot for underwater robot |
| CN111335846A (en) * | 2020-04-26 | 2020-06-26 | 罗林峰 | Coal bed gas exploitation well-flushing equipment |
| CN111335846B (en) * | 2020-04-26 | 2022-10-25 | 贵阳鑫睿材料科技有限公司 | Coal bed gas exploitation well-flushing equipment |
| CN114320195A (en) * | 2022-01-07 | 2022-04-12 | 西安石油大学 | Reversing connector for continuous sand washing and well washing |
| CN114320195B (en) * | 2022-01-07 | 2023-08-22 | 西安石油大学 | Reversing joint for continuous sand flushing and well flushing |
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| Publication number | Publication date |
|---|---|
| CN103615207B (en) | 2016-04-20 |
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Granted publication date: 20160420 Termination date: 20161203 |
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