CN204703804U - A kind of horizontal well negative pressure takes out sand device - Google Patents
A kind of horizontal well negative pressure takes out sand device Download PDFInfo
- Publication number
- CN204703804U CN204703804U CN201520301204.9U CN201520301204U CN204703804U CN 204703804 U CN204703804 U CN 204703804U CN 201520301204 U CN201520301204 U CN 201520301204U CN 204703804 U CN204703804 U CN 204703804U
- Authority
- CN
- China
- Prior art keywords
- connector
- out sand
- negative pressure
- horizontal well
- central tube
- 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.)
- Expired - Fee Related
Links
- 239000004576 sand Substances 0.000 title claims abstract description 85
- 238000007789 sealing Methods 0.000 claims description 18
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 abstract description 15
- 239000004568 cement Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 18
- 239000007788 liquid Substances 0.000 description 15
- 238000010276 construction Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 239000003978 infusion fluid Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Nozzles (AREA)
Abstract
The utility model specifically provides a kind of horizontal well negative pressure and takes out sand device, comprise urceolus, trunnion, central tube, nozzle, connector and baffle plate head, connector top to be inserted in urceolus and to be threaded with it, connector lower end surface is connected with baffle plate head, connector front end outer wall is connected with central tube lower end, connector front end endoporus is connected with trunnion lower end, trunnion passes central tube upper surface from central tube inside, nozzle is placed in the endoporus of trunnion bottom, nozzle lower surface to be against in connector front end on hole end surface, outer tube inner wall and form annular space between central tube and connector front end outer wall.This utility model realizes continuous negative pressure and takes out sand in horizontal segment pit shaft, has the function of snaking in sleeve pipe, broken cement simultaneously, solve discontinuous in horizontal well sand washing process, miss serious problem.
Description
Technical field
The utility model belongs to oil extraction in oil field technical field, is specifically related to a kind of horizontal well negative pressure and takes out sand device.
Background technology
Along with the progress of horizontal well development technology, horizontal section length, transformation hop count and pressure break scale increase year by year, especially the sizable application of horizontal well " volume fracturing " (" thousand side's sand, incomparably liquid ", segmentation many bunches), see in horizontal well pit shaft that sand cycle short, sand production rate is large, to miss the problem such as serious day by day serious, have impact on effective performance of production capacity and carrying out smoothly of later stage measure, sand-flushing operation need be carried out in time and ensure pit shaft smoothness.
At present, " conventional nib+instrument oil pipe " sand washing process is still the main process that each elephant horizontal well adopts, and this process matching is simple, cost is low, strong adaptability, is widely used in the horizontal well that horizontal segment is shorter, wastage is less.
But on-the-spot application shows, " conventional nib+instrument oil pipe " sand washing process of present employing also exist sand washing discontinuous cause the high and mesolow oil reservoir of length consuming time, cost to enter ground liquid measure is large, the row of returning leads the problems such as low, formation produces and to a certain degree injures simultaneously, have impact on horizontal well development effect.
Attempt having carried out improving improving or have developed new sand flushing tool based on conventional nib for above problem oil field at home, as Chinese patent CN203394393U discloses a kind of sand-washing pen point, this sand-washing pen point comprises a tubular configured joint, the upper and lower end of this tubular configured joint is respectively equipped with internal thread, and the inwall of this tubular configured joint is provided with annular boss; One spray nozzle plate is by being resisted against this annular boss on the downside of annular boss; One tubulose nib is connected to tubular configured joint lower end by the internal thread of tubular configured joint lower end, and the upper end of this tubulose nib is resisted against the downside of spray nozzle plate; Described spray nozzle plate is provided with three up big and down small shoulder holes, is fixedly installed a nozzle in each shoulder hole; Described nozzle bottom protrudes from the bottom surface of spray nozzle plate, and the anti-blocking cap of a copper is connected to the bottom of nozzle.This patent increases the flow velocity of sand cleaning fluid, improves sand washing effect, shortens sand washing time and labour intensity.
And for example Chinese patent CN201513144U discloses a kind of downhole reverse-circulation sand flusher for horizontal wells, a central tube is connected with in top connection lower end, a packing element mandrel is connected with at top connection lower end external screw thread, packing element mandrel wall there is liquid inlet, the outer wall of packing element mandrel is fixed with two V-type packing elements, the lower end of packing element mandrel is connected with nozzle shaft, annular space is formed between nozzle shaft inwall and central tube outer wall, nozzle axial wall there is liquid outlet, nozzle shaft is equipped with nozzle, and the bottom of nozzle shaft is connected with the pressure cap that top is taper.This patent can realize eddy flow sand washing, and the eddy flow mulling liquid of generation is counter fast drains into ground.
But, this type of has carried out improving based on conventional nib and improves or have developed new sand flushing tool and only can improve the sand washing performance of certain aspect or change the direction of partial fluid in pit shaft, still cannot inherently to solve discontinuous in horizontal well sand washing process, miss serious problem.
Utility model content
The purpose of this utility model is to provide a kind of horizontal well negative pressure and takes out sand device, realizes continuous negative pressure and take out sand in horizontal segment pit shaft, has the function of snaking in sleeve pipe, broken cement simultaneously, solve discontinuous in horizontal well sand washing process, miss serious problem.
The technical solution of the utility model there is provided a kind of horizontal well negative pressure and takes out sand device, comprise urceolus, trunnion, central tube, nozzle, connector and baffle plate head, described connector top to be inserted in urceolus and to be threaded with it, described connector lower end surface is connected with baffle plate head, described connector front end outer wall is connected with central tube lower end, connector front end endoporus is connected with trunnion lower end, described trunnion passes central tube upper surface from central tube inside, described nozzle is placed in the endoporus of trunnion bottom, nozzle lower surface to be against in connector front end on hole end surface, described outer tube inner wall and form annular space between central tube and connector front end outer wall, described urceolus is provided with spray-hole, described connector inside is provided with central passage, multiple delivery hole one communicated with urceolus is disposed radially outside central passage, be provided with vertically outside central passage multiple run through connector take out sand hole, connector lower sides is arranged multiple delivery hole two, connector lower inner wall becomes a cavity with baffle plate capitiform, delivery hole two communicates with this cavity, be provided with in the cavity that described connector becomes with baffle plate capitiform and on baffle plate head and multiplely take out sand passage.
Sealing ring one is provided with between above-mentioned central tube and trunnion.
Sealing mat is provided with between above-mentioned central tube and connector.
Sealing ring two is provided with between above-mentioned connector and urceolus.
The axial angle of above-mentioned spray-hole is 30 °, and radial angle is 20 °.
Above-mentioned delivery hole one and take out sand hole and all have 3, and delivery hole one and take out sand hole and be circumferentially in interval alternative distribution in connector.
Said nozzle is the pyramidal structure that the little lower bore of upper bore is large.
For being threaded between above-mentioned connector with baffle plate head.
Above-mentioned connector with between central tube for being threaded.
Above-mentioned connector front end endoporus with between trunnion for being threaded.
The beneficial effects of the utility model:
(1) this horizontal well negative pressure that the utility model provides take out sand device by desanding in pit shaft, snaking, broken cement function i ntegration and realize one-trip string connection do, greatly simplifie working procedure, improve efficiency of construction.
(2) this horizontal well negative pressure that the utility model provides is taken out sand device and is devised the mechanism such as trunnion, nozzle that can produce negative pressure, make that energy to be acted directly on the trunnion of tool interior by Special circulation passage by the power liquid on ground, nozzle place forms negative pressure continuously, by sand washing innovation for negative pressure takes out sand, improve desanding efficiency.
(3) this horizontal well negative pressure that the utility model provides is taken out sand device and is devised spray-hole by the ejection at a high speed of fraction power liquid, complete smoothly and take out sand function also there is cleaning pit shaft encrustation, broken cement function simultaneously effectively stirring sand grains, the flow velocity at spray-hole place also can be controlled according to well head pump delivery, to reach object broken in various degree, improve the compliance to pit shaft, ensure that the smoothness of pit shaft after construction, for looking for water blockoff, survey production profile, repeat the subsequent jobs such as transformation and provide good guarantee.
(4) this horizontal well negative pressure that the utility model provides is taken out sand device and is adopted and concentric oil tubes process pipe string matching operation; three passages are established in horizontal segment; in work progress, circulating fluid does not directly contact with stratum, and available protecting reservoir solves the problem of missing horizontal well desanding process from technique source simultaneously.
Below with reference to accompanying drawing, the utility model is described in further details.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model horizontal well negative pressure takes out sand device.
Fig. 2 is the schematic cross-section along A-A direction in Fig. 1.
Fig. 3 is that the utility model horizontal well negative pressure takes out flow direction schematic diagram in the sand device course of work.
Fig. 4 is that horizontal well continuous negative pressure takes out flow direction schematic diagram in sand process pipe string and work progress.
Description of reference numerals: 1, urceolus; 2, trunnion; 3, sealing ring one; 4, central tube; 5, sealing mat; 6, nozzle; 7, connector; 8, sealing ring two; 9, baffle plate head; 10, spray-hole; 11, delivery hole one; 12, delivery hole two; 13, sand hole is taken out; 14, sand passage is taken out; 15, central passage; 16, horizontal well negative pressure takes out sand device; 17, built-in oil pipe; 18, concentric oil tubes box cupling; 19, sleeve pipe; 20, instrument oil pipe; 21, sealing cup; 22, crossover sub.
Detailed description of the invention
Embodiment 1:
Discontinuous in order to overcome in existing level well sand washing process, miss serious problem, present embodiments provide a kind of as Fig. 1, Fig. 2, horizontal well negative pressure shown in Fig. 3 takes out sand device, comprise urceolus 1, trunnion 2, central tube 4, nozzle 6, connector 7 and baffle plate head 9, described connector 7 top to be inserted in urceolus 1 and to be threaded with it, described connector 7 lower end surface is connected with baffle plate head 9, described connector 7 front end outer wall is connected with central tube 4 lower end, connector 7 front end endoporus is connected with trunnion 2 lower end, described trunnion 2 passes central tube 4 upper surface from central tube 4 inside, described nozzle 6 is placed in the endoporus of trunnion 2 bottom, nozzle 6 lower surface to be against in connector 7 front end on hole end surface, described urceolus 1 inwall and form annular space between central tube 4 and connector 7 front end outer wall, described urceolus 1 is provided with spray-hole 10, described connector 7 inside is provided with central passage 15, multiple delivery hole 1 communicated with urceolus 1 is disposed radially outside central passage 15, be provided with vertically outside central passage 15 multiple run through connector 7 take out sand hole 13, connector 7 lower sides arranges multiple delivery hole 2 12, connector 7 lower inner wall and baffle plate head 9 form a cavity, delivery hole 2 12 communicates with this cavity, be provided with in the cavity that described connector 7 and baffle plate head 9 are formed and on baffle plate head 9 and multiplely take out sand passage 14.
Wherein, sealing ring 1 is provided with between described central tube 4 and trunnion 2; Sealing mat 5 is provided with between described central tube 4 and connector 7; Sealing ring 28 is provided with between described connector 7 and urceolus 1; Described connector 7 with between baffle plate head 9 for being threaded; Described connector 7 with between central tube 4 for being threaded; Described connector 7 front end endoporus with between trunnion 2 for being threaded.
The installation process that horizontal well negative pressure of the present utility model takes out sand device is as follows: as shown in Figure 1, after first nozzle 6 being inserted trunnion 2 bottom endoporus, then be connected with connector 7 front end inner hole thread by trunnion 2, now nozzle 6 lower surface has withstood on hole end surface in connector 7 front end and has been located by nozzle 6; Sealing ring 1 is built in the end of central tube 4, sealing mat 5 overlaps before connector 7 in end slot, with being threaded of connector 7 front end cylindrical after then being inserted from trunnion 2 front end by central tube 4; Sealing ring 28 is inserted in connector 7 peripheral groove, then urceolus 1 is inserted in connector 7 from top and is threaded with it; Baffle plate head 9 is threaded with connector 7 lower end surface.
In addition, as shown in Figure 1, the axial angle of described spray-hole 10 is 30 °, and radial angle is 20 °; Described nozzle 6 is the pyramidal structure that the little lower bore of upper bore is large.As shown in Figure 2, described delivery hole 1 and take out sand hole 13 and all have 3, and delivery hole 1 and take out sand hole 13 and be circumferentially in interval alternative distribution in connector 7.
This horizontal well negative pressure that the utility model provides is taken out sand device and is devised the mechanism such as trunnion 2, nozzle 6 that can produce negative pressure, make that energy to be acted directly on the trunnion 2 of tool interior by Special circulation passage by the power liquid on ground, nozzle 6 place forms negative pressure continuously, by sand washing innovation for negative pressure takes out sand, improve desanding efficiency.Simultaneously, spray-hole 10 is by the ejection at a high speed of fraction power liquid, complete smoothly and take out sand function also there is cleaning pit shaft encrustation, broken cement function simultaneously effectively stirring sand grains, the flow velocity at spray-hole place also can be controlled according to well head pump delivery, to reach object broken in various degree, improve the compliance to pit shaft, ensure that the smoothness of pit shaft after construction, for looking for water blockoff, survey production profile, repeat the subsequent jobs such as transformation and provide good guarantee.
Embodiment 2:
On the basis of embodiment 1, present embodiments provide the utility model horizontal well negative pressure and take out the supporting and work progress of the process pipe string of sand device in construction process:
1, well head is supporting
As shown in Figure 4, before construction, well head is changed to " well head four-way+continuous circulation wellhead assembly ".
2, process pipe string is supporting
First carry out spy sand face and drifting operation, determine position, sand face and ensure the above pit shaft in position, sand face pass through performance; Secondly Joining Technology tubing string, process pipe string is designed to (artesian well is down to well head): horizontal well negative pressure takes out the single concentric oil tubes of sand device 16+ (instrument oil pipe+built-in oil pipe 17+ concentric oil tubes box cupling 18)+sealing cup 21+ crossover sub 22+ instrument oil pipe 20 (design length is relevant to position, sand face) to well head, the distance of Design of length must be greater than the length of horizontal segment, ensures that in work progress, sealing cup 21 is in straight well section all the time.
3, connection surface line, continuous circulation take out sand
Instrument oil pipe 20 exports and connects filter sand tank, and well head four-way connects pump truck; Turn on pump injects liquid, until well head returns liquid normally and set up circulation, now liquid flow direction as shown in Figure 4, adopts thereafter continuous circulation wellhead assembly to carry out the not termination of pumping circulation that makes up a joint continuously and takes out sand to artificial bottom of a well.
It is as follows that horizontal well negative pressure takes out sand device operating principle:
Circulation relies on continuous circulation wellhead assembly can realize not termination of pumping after setting up and makes up a joint, and now to take out sand device internal flow direction in horizontal well negative pressure constant all the time for liquid, as shown in Figure 3.Well head infusion liquid only has only a few to be penetrated (accounting for 4% of infusion total amount) by spray-hole 10, the flow velocity (general control is at 20m/s ~ 30m/s) at spray-hole 10 place now can be controlled according to well head pump delivery, this liquid is directly sprayed onto shaft in wall and carries out snaking and can broken cement, and the sand setting simultaneously horizontal well negative pressure being taken out sand device 16 front end is broken up to have rushed and made it to be in suspended state; Overwhelming majority's (accounting for 96% of infusion total amount) in well head infusion liquid enters nozzle 6 through delivery hole 1 and sprays formation negative pressure, now broken up, broken and the sand grains suspended, dirt, cement sucked and enter trunnion 2 by from taking out sand passage 14 through taking out sand hole 13, circulate together with well head infusion liquid and return out well head.
If arrows direction in Fig. 3 and Fig. 4 is liquid flow direction in the present embodiment.
The present embodiment adopts and concentric oil tubes (2
7/
8〞 instrument oil pipe+1
7/
8〞 built-in oil pipe+concentric oil tubes box cupling) process pipe string matching operation, in horizontal segment, establish three passages, 5
1/
2〞 sleeve pipe 19 and 2
7/
8〞 instrument oil pipe 20,2
7/
8〞 instrument oil pipe 20 and 1
7/
8〞 built-in oil pipe 17 and 1
7/
8〞 built-in oil pipe 17 is inner, early stage, all technique only had inner two passages of sleeve pipe and instrument oil pipe and instrument oil pipe,, in work progress, circulating fluid does not directly contact with stratum, and available protecting reservoir solves the problem of missing horizontal well desanding process from technique source simultaneously; Simultaneously horizontal segment inner cycle channel adopts concentric oil tubes inner loop, reduces to return out channel cross-sectional area and improve flow velocity and prop-carrying capacity, eliminates sand grains and migrates in horizontal segment to straight well section process, again deposit the risk of the process pipe string bit freezing caused.
In sum, this horizontal well negative pressure that the utility model provides take out sand device by desanding in pit shaft, snaking, broken cement function i ntegration and realize one-trip string connection do, greatly simplifie working procedure, improve efficiency of construction.
More than exemplifying is only illustrate of the present utility model, does not form the restriction to protection domain of the present utility model, everyly all belongs within protection domain of the present utility model with the same or analogous design of the utility model.
Claims (10)
1. a horizontal well negative pressure takes out sand device, it is characterized in that: comprise urceolus (1), trunnion (2), central tube (4), nozzle (6), connector (7) and baffle plate head (9), described connector (7) top to be inserted in urceolus (1) and to be threaded with it, described connector (7) lower end surface is connected with baffle plate head (9), described connector (7) front end outer wall is connected with central tube (4) lower end, connector (7) front end endoporus is connected with trunnion (2) lower end, described trunnion (2) passes central tube (4) upper surface from central tube (4) inside, described nozzle (6) is placed in the endoporus of trunnion (2) bottom, nozzle (6) lower surface to be against in connector (7) front end on hole end surface, described urceolus (1) inwall and form annular space between central tube (4) and connector (7) front end outer wall, described urceolus (1) is provided with spray-hole (10), described connector (7) inside is provided with central passage (15), central passage (15) outside is disposed radially multiple delivery hole one (11) communicated with urceolus (1), central passage (15) outside be provided with vertically multiple run through connector (7) take out sand hole (13), connector (7) lower sides is arranged multiple delivery hole two (12), connector (7) lower inner wall and baffle plate head (9) form a cavity, delivery hole two (12) communicates with this cavity, be provided with in the cavity that described connector (7) and baffle plate head (9) are formed and on baffle plate head (9) and multiplely take out sand passage (14).
2. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: be provided with sealing ring one (3) between described central tube (4) and trunnion (2).
3. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: be provided with sealing mat (5) between described central tube (4) and connector (7).
4. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: be provided with sealing ring two (8) between described connector (7) and urceolus (1).
5. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: the axial angle of described spray-hole (10) is 30 °, and radial angle is 20 °.
6. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: described delivery hole one (11) and take out sand hole (13) and all have 3, and delivery hole one (11) and take out sand hole (13) and be circumferentially in interval alternative distribution in connector (7).
7. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: described nozzle (6) is the large pyramidal structure of the little lower bore of upper bore.
8. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: for being threaded between described connector (7) with baffle plate head (9).
9. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: for being threaded between described connector (7) with central tube (4).
10. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: described connector (7) front end endoporus with between trunnion (2) for being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520301204.9U CN204703804U (en) | 2015-05-12 | 2015-05-12 | A kind of horizontal well negative pressure takes out sand device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520301204.9U CN204703804U (en) | 2015-05-12 | 2015-05-12 | A kind of horizontal well negative pressure takes out sand device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204703804U true CN204703804U (en) | 2015-10-14 |
Family
ID=54283429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520301204.9U Expired - Fee Related CN204703804U (en) | 2015-05-12 | 2015-05-12 | A kind of horizontal well negative pressure takes out sand device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204703804U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971541A (en) * | 2016-07-07 | 2016-09-28 | 合力（天津）石油钻采技术服务有限公司 | Vacuum suction pitshaft fishing and cleaning tool |
| CN106285523A (en) * | 2015-05-12 | 2017-01-04 | 中国石油天然气股份有限公司 | A kind of horizontal well negative pressure takes out sand device |
| CN106677727A (en) * | 2016-12-20 | 2017-05-17 | 西安迈克斯石油技术有限公司 | Continuous negative pressure sand washing device and system thereof |
-
2015
- 2015-05-12 CN CN201520301204.9U patent/CN204703804U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285523A (en) * | 2015-05-12 | 2017-01-04 | 中国石油天然气股份有限公司 | A kind of horizontal well negative pressure takes out sand device |
| CN105971541A (en) * | 2016-07-07 | 2016-09-28 | 合力（天津）石油钻采技术服务有限公司 | Vacuum suction pitshaft fishing and cleaning tool |
| CN106677727A (en) * | 2016-12-20 | 2017-05-17 | 西安迈克斯石油技术有限公司 | Continuous negative pressure sand washing device and system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202970550U (en) | Rotational-flow sand washing and deblocking pipe column for horizontal well | |
| CN105178859A (en) | Full-well-section self-suction type reverse circulation gas drilling system for oil and gas drilling | |
| US9850744B2 (en) | Method for extracting coalbed gas through water and coal dust drainage and a device thereof | |
| CN204703804U (en) | A kind of horizontal well negative pressure takes out sand device | |
| CN103388466A (en) | Concentric pipe hydraulic jet coal dust washing downhole device | |
| CN105041243B (en) | A kind of horizontal well concentric oil tubes continuous negative pressure takes out sand process pipe string | |
| CN205036295U (en) | Full well section is from inhaling anti - recycle gas drilling system of formula | |
| CN106285523A (en) | A kind of horizontal well negative pressure takes out sand device | |
| CN102287152B (en) | Rotating spray sand cleaning method | |
| CN205089245U (en) | Side direction efflux formula detritus bed removing tool | |
| CN105178897A (en) | Gas drilling ground manifold connecting structure | |
| CN102877824A (en) | Horizontal well staged and multi-cluster fracturing method by hydraulic jetting | |
| CN201747329U (en) | Sand cleaning tool of large-inclination and large-well diameter absorption well | |
| CN106988693A (en) | Concentric tube double-jet aeration negative pressure sand pumping device and method | |
| CN201513144U (en) | Downhole reverse-circulation sand flusher for horizontal wells | |
| CN102536144A (en) | Coal-seam gas dual-channel well-washing valve | |
| CN205036327U (en) | Gas drilling ground manifold connection structure | |
| CN204782851U (en) | Whirl sand removal device | |
| CN204663435U (en) | Reverse circulation down-hole hammer transformational structure | |
| CN103388465A (en) | Downhole device using hydraulic jets of parallel tubes to flush pulverized coal | |
| CN203603805U (en) | Coiled tubing sand washing and well flushing tool | |
| CN2893131Y (en) | Sand flushing packer | |
| CN204703809U (en) | A kind of water supply well concentric double pipe sand-flushing process pipe string | |
| CN205211283U (en) | Experimental device for two gradient well drillings of efflux under simulation well | |
| CN206987754U (en) | Concentric tube double-jet aeration negative pressure sand pumping device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 |