CN103615207B - A kind of coal bed gas well shaft bottom well washing apparatus - Google Patents
A kind of coal bed gas well shaft bottom well washing apparatus Download PDFInfo
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- CN103615207B CN103615207B CN201310652209.1A CN201310652209A CN103615207B CN 103615207 B CN103615207 B CN 103615207B CN 201310652209 A CN201310652209 A CN 201310652209A CN 103615207 B CN103615207 B CN 103615207B
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- shaft bottom
- well
- coal bed
- bed gas
- shower nozzle
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Abstract
The present invention relates to a kind of coal bed gas well shaft bottom well washing apparatus, it is made up of outer oil pipe, anemostat, connecting piece, nozzle, shower nozzle and mud dredger, and mud dredger is made up of loose slice, prerotation vane and bullet.The feature of described mud dredger is: the bullet of mud dredger is around being dispersed with prerotation vane, bullet evenly installs loose slice, transfer in Tubing During Running at well head workover rig, prerotation vane contacts with silt and impels rotary head to rotate, mud dredger gos deep in silt layer process, and loose slice is upwards packed up under silt resistance, well head workover rig mention in Tubing During Running, pine slice hypotenuse is opened naturally by the effect of silt layer resistance, plays loosening studies on sediment.The feature of affiliated shower nozzle is: surrounding annular spread spray-hole, with the acting in conjunction of jet pump main part, makes liquid transporting reach dynamic equilibrium, can ensure that shaft bottom amount of liquid is constant, and then ensures that coal bed gas well bottom pressure is constant; Simultaneously the cooperating of shower nozzle and mud dredger, causes the mechanical loosening silt layer acting in conjunction of hydrodynamic cleaning and mud dredger.This coal bed gas well shaft bottom well washing apparatus implementation process is reliable, effectively can improve the efficiency to coal bed gas well well-flushing.
Description
Technical field
The present invention relates to a kind of coal bed gas well shaft bottom well washing apparatus, belong to field of petroleum machinery.
Background technology
In the process that coal bed gas is produced, the solid particle in coal seam can enter shaft bottom along with production water, after husky mud deposition, can block the preforation tunnel of producing zone, cause 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 returns to ground by the annular space between oil pipe and sleeve pipe, shaft bottom producing fluid level can uprise, bottom pressure is caused to increase, it is excessive that coal bed gas well requires that in washing well process bottom pressure can not change, so well washing apparatus is in the past undesirable.In addition well washing apparatus relies on jetting merely in the past, the silt of flushing manhole bottom sediments, and it is not high to dig husky efficiency.
Summary of the invention
The present invention overcomes original well washing apparatus can increase bottom pressure and the simple deficiency relying 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 the function that husky and waterpower digs husky cooperative work, and shaft bottom producing fluid level can be kept constant, realize 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 to connecting piece outside, and anemostat is arranged on outer oil pipe center; Anemostat is connected to connecting piece inside; Nozzle is bolted on connecting piece, is positioned at below anemostat; Shower nozzle is loaded on bottom connecting piece, close connecting piece, and with its formation cavity; Mud dredger is made up of loose slice, prerotation vane and bullet, is arranged on immediately below shower nozzle, is positioned at the bottommost of well washing apparatus, and mud dredger and shower nozzle can relatively rotate.Bullet is around being dispersed with prerotation vane, bullet evenly installs loose slice, transfer in Tubing During Running at 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, well head workover rig mention in Tubing During Running, pine slice hypotenuse is opened naturally by the effect of silt layer resistance, plays loosening studies on sediment; Ejecting device surrounding annular spread spray-hole; In the middle part of connecting piece, hoop has circular intake.
Compared with existing equipment, the present invention, owing to adopting above technological means, has the following advantages: the liquid measure 1, 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 to remain unchanged, thus ensure that bottom pressure is constant.2, sprinkler hydraulic rinses and loosens the acting in conjunction of silt layer with mud dredger machinery, can Rapid Cleaning shaft bottom silt more.
Accompanying drawing explanation
Fig. 1 is coal bed gas well shaft bottom of the present invention well washing apparatus structural representation;
Fig. 2 is coal bed gas well shaft bottom of the present invention 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.
Detailed description of the invention
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 is made up 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) flows into the toroidal cavity I formed by outer oil pipe 1 and anemostat 2 from the annular space chamber of outer tube and central tube, flow through the kidney type through hole 12 of connecting piece 3 annular spread again, enter into the cavity II that connecting piece 3 is formed with shower nozzle 5.Hydraulic fluid is divided into two-way to flow to after entering cavity II, one road fluid is through multiple spray-holes 11 of shower nozzle 5 annular spread, the silt in shaft bottom is impacted with high velocity jet, another road upwards sprays at a high speed through jet pump nozzle 4, negative pressure is produced when working fluid sprays from nozzle, the solid-liquid fluid-mixing of cavity III between well washing apparatus and the borehole wall is sucked through intake 9, returns to ground eventually through anemostat 2, central tube.Fluid between well washing apparatus and the borehole wall sprays working fluid by shower nozzle 5, is mingled with earth and the grains of sand (filled arrows) of flushing.
As shown in Figure 2, Figure 4 shows, mud dredger, in the continual conveying of liquid, is pumped by outer tube drive by well head workover rig.When bullet 8 is drilled into downwards in silt layer, because bullet 8 external surface is dispersed with the prerotation vane 7 angled with vertical direction, whole mud dredger is impelled to be rotated counterclockwise certain angle piercing in process, loose slice 6 simultaneously above bullet 8 is under the resistance of silt layer, upwards draw (as Fig. 1) in, decrease the resistance that mud dredger is moved downward.After mud dredger is drilled into 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 loose slice 6 one-tenth open configuration simultaneously, and rotational resistance is large especially, rotary motion can not be produced in the process of moving upward, in motion up and down repeatedly, mud dredger just can complete the rotation of 360 °, completes the loose sand industry of 360 °.The silt loosened, under the effect of shower nozzle 5 high-velocity fluid, forms silt fluid-mixing, enters into anemostat 2, upwards finally spray go back to ground by central tube by intake 9.
As shown in Figure 1, Figure 3 and Figure 4, the spout of nozzle 4 upward, anemostat 2 heavy caliber end upward, prerotation vane 7 is distributed in bullet 8 external surface, quantity can change according to demand, connected by 4 bolts 10 between nozzle 4 and anemostat 2, connecting piece 3 is inner is axially uniformly distributed 4 kidney type through holes 12, and in the middle part of connecting piece 3, radial direction is uniformly distributed four intakes 9.
Claims (3)
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 made up of 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); It is outside that outer oil pipe (1) is connected to connecting piece (3), and anemostat (2) is arranged on outer oil pipe (1) center; It is inner that anemostat (2) is connected to connecting piece (3); Nozzle (4) bolt (10) is fixed on connecting piece (3), is positioned at anemostat (2) below; Shower nozzle (5) be loaded on connecting piece (3) bottom, close connecting piece (3), and with its formation cavity; Mud dredger is made up of loose slice (6), prerotation vane (7) and bullet (8), be arranged on immediately below shower nozzle (5), be positioned at the bottommost of coal bed gas well shaft bottom well washing apparatus, mud dredger and shower nozzle (5) can relatively rotate; Bullet (8) is around being dispersed with prerotation vane (7), bullet (8) is upper evenly installs loose slice (6), transfer in Tubing During Running at 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, well head workover rig mention in Tubing During Running, pine slice (6) hypotenuse is opened naturally by the effect of silt layer resistance, plays loosening studies on sediment.
2. coal bed gas well shaft bottom according to claim 1 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 sprayed by shower nozzle (5) is identical with the liquid measure that annular intake (9) in connecting piece (3) sucks, shaft bottom liquid measure is made to reach dynamic equilibrium, realize shaft bottom amount of liquid to remain unchanged, thus ensure that bottom pressure is constant.
3. coal bed gas well shaft bottom according to claim 1 well washing apparatus, is characterized in that: the hydrodynamic cleaning of shower nozzle (5) and mud dredger machinery loosen the acting in conjunction of silt layer, can Rapid Cleaning shaft bottom silt more.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103615207A CN103615207A (en) | 2014-03-05 |
| CN103615207B true 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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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967435B (en) * | 2014-05-21 | 2016-04-06 | 西南石油大学 | A kind of coal bed gas well shaft bottom fettling installation |
| CN108082436A (en) * | 2018-01-25 | 2018-05-29 | 西南石油大学 | A kind of propulsion device and underwater robot for underwater robot |
| 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 |
| CN114320195B (en) * | 2022-01-07 | 2023-08-22 | 西安石油大学 | Reversing joint for continuous sand flushing and well flushing |
Family Cites Families (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 pollution-free continuous coal ash washing process 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 |
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- 2013-12-03 CN CN201310652209.1A patent/CN103615207B/en not_active Expired - Fee Related
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