CN200993001Y - Non-clogging stratified fracturing pipe string and its non-clogging stratified fracturing device - Google Patents
Non-clogging stratified fracturing pipe string and its non-clogging stratified fracturing device Download PDFInfo
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- CN200993001Y CN200993001Y CN 200620176007 CN200620176007U CN200993001Y CN 200993001 Y CN200993001 Y CN 200993001Y CN 200620176007 CN200620176007 CN 200620176007 CN 200620176007 U CN200620176007 U CN 200620176007U CN 200993001 Y CN200993001 Y CN 200993001Y
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- tube
- endoporus
- tubes
- suspended tubes
- separate stratum
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 210000002445 nipple Anatomy 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 31
- 238000012856 packing Methods 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 abstract 2
- 239000004576 sand Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 241000282472 Canis lupus familiaris Species 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A non clogging layered fracturing tube and non clogging layered fracturing device, which relates to the downhole fracturing acidizing operation in oil and nature gas exploitation process. For overcoming the shortage that after the layered fracturing tube operated with layer, the steel ball and the sand spraying slide cover are leaved in the tube to make the tube can not be smooth, the tube with top down connectedly consists of a telescopic compensator, a well washing switch, an oil tube pipe nipple, a safety connector, a packer, a non clogging layered fracturing device, a setting ball seat and an oil tube shoes; the non clogging layered fracturing device is mainly included an outermost fixed tube cover, a middle moveable tubes and an inner setting tubes; among the fixed tubes, the moveable tubes and the setting tubes are clearance fit, the locked block moves the tubes to fixed along the axis direction; a shear pin puts the fixed cover and the sealed slide cover fixed at the moveable tubes. The beneficial effects of the utility model is that: the structure is reasonable, after fracturing operating the oil tube is smooth top to down, and can put the testing apparatus into the well bottom to test injection or output section, and put into continuous oil tube to make well bottom treatment.
Description
Technical field
The utility model relates to underground fracture (acidifying) working string in a kind of oil and gas exploitation process, particularly relates to a kind of nothing and stops up the separate stratum fracfturing tubing string and do not have the separate stratum fracfturing of obstruction device.
Background technology
Pressure break (acidifying) is to improve oil gas well capacity, realization oil gas field stable high yield technical measures.Often two sections oil-gas Layer being carried out the separate stratum fracfturing acidifying as required transforms, separate stratum fracfturing (acidifying) tubing string commonly used is at present formed as shown in Figure 1, be followed successively by telescopic compensator 3 from top to bottom, well-flushing switch 4, tubing nipple 5, safety joint 6, packer I7, sandblast sliding sleeve 8, packer II9, sandblast sleeve base 10, setting ball seat 11, tubing shoe 12, the tubing string of forming by above-mentioned parts be lowered in the sleeve pipe 2 after oil pipe 1 is connected, the sandblast sliding sleeve is positioned at the upper strata that needs pressure break, packer II, the sandblast sleeve base, setting ball seat, tubing shoes etc. are between lower floor that needs pressure break and upper strata.On March 29th, 2006, the tubing string in State Intellectual Property Office's disclosed " gas well separate layer fracturing and producing integrated well completing pipe string and technology " application for a patent for invention is exactly like this.After being hit down by steel ball, the sandblast sliding sleeve that process pipe string is used owing to layering enters in the sandblast sleeve base, play and stop that fracturing fluid enters lower floor's effect, steel ball and sandblast sliding sleeve are stayed in the tubing string all the time, can not be unimpeded up and down in the whole tubing string, influence under the tester and carry out operation trials injection (or output) section, can't descend coiled tubing to carry out the shaft bottom and handle to the shaft bottom.
The utility model content
The purpose of this utility model is for after overcoming existing separate stratum fracfturing tubing string separate stratum fracfturing (acidifying) operation, steel ball and sandblast sliding sleeve are stayed in the tubing string, can not be unimpeded up and down in the whole tubing string, influence under the tester and to carry out operation trials to the shaft bottom and inject (or output) section, can't descend coiled tubing to carry out the deficiency that handle in the shaft bottom, a kind of nothing obstruction separate stratum fracfturing tubing string is provided and not have the separate stratum fracfturing of obstruction device.
In order to achieve the above object, the utility model does not have the separate stratum fracfturing of obstruction tubing string, is followed successively by telescopic compensator, well-flushing switch, tubing nipple, safety joint, packer, nothing obstruction separate stratum fracfturing device, setting ball seat, tubing shoe from top to bottom.Packer is positioned on the upper strata, does not have the separate stratum fracfturing of obstruction device between the upper and lower.
Do not have the nothing of stopping up in the separate stratum fracfturing tubing string and stop up the separate stratum fracfturing device, comprise top connection, steel ball, central tube, blast tube, lower contact, the sandblast hole is arranged on the blast tube, the central tube excircle is equipped with packing element, the central tube lower end is connected with the upper end of lower contact, and the central tube upper end is connected with the lower end of packer short circuit; The endoporus of the endoporus of lower contact and packer short circuit is a stepped hole, with the central tube axial restraint; The upper end of packer short circuit is connected with the blast tube lower end; The internal thread of blast tube upper end is connected with pressure cap, and the external screw thread of blast tube upper end is connected with top connection; The minimum diameter of bore of pressure cap, blast tube, central tube, lower contact is measure-alike; Be connected with suspended tubes from top to bottom in turn, become snapping head, extension pipe, seal head along pressure cap, blast tube, central tube, lower contact endoporus; The sandblast hole is arranged, sandblast hole and the corresponding installation in sandblast hole on the blast tube on the suspended tubes; Between the lower surface of pressure cap and the blast tube upper end internal thread lower step lock dog is installed, lock dog is with the suspended tubes axial location; The lower end of suspended tubes is connected with change snapping head upper end, becomes the middle part that the snapping head is positioned at central tube, becomes snapping head lower end and is connected with extension pipe, and the lower end of extension pipe is connected with seal head, and seal head is positioned at the middle part of lower contact; The minimum endoporus of suspended tubes, the maximum outside diameter that becomes snapping head, extension pipe, seal head and pressure cap, blast tube, central tube, lower contact is matched in clearance; The endoporus that becomes the snapping head is less than the suspended tubes endoporus; The suspended tubes endoporus fixedly mounts fixed cover and sealing sliding sleeve from top to bottom successively, and shear pin II and shear pin I are fixed on fixed cover and sealing sliding sleeve on the suspended tubes endoporus respectively, and the endoporus of sealing sliding sleeve is less than the endoporus of fixed cover; The sealing sliding sleeve is sealed the sandblast hole; Fixed cover is radially fixing with lock dog; Distance between sandblast Kongzui lower end and the change snapping head upper surface is greater than the length of sealing sliding sleeve.
Put when steel ball I sets in sealed sliding, suppress, cut off shear pin I, steel ball I and sealing sliding sleeve glide along suspended tubes, are sitting on the upper surface that becomes the snapping head.
When steel ball II sets on fixed cover, to suppress and cut off shear pin II, steel ball II and fixed cover glide along suspended tubes, are sitting in sealed sliding and put on the end face; Lock dog ejects from suspended tubes, comes off, and suppresses, and steel ball II, fixed cover, sealing sliding sleeve, suspended tubes, change snapping head, extension pipe, seal head shift out and do not have the separate stratum fracfturing of obstruction tubing string to lower slider.
The utility model does not have the beneficial effect that stops up separate stratum fracfturing tubing string and device thereof, rational in infrastructure, be convenient to construction operation, unimpeded up and down in the oil pipe behind the pressing crack construction, tester can be tested injection (or output) section down to the shaft bottom, and coiled tubing carries out the shaft bottom processing down.
Description of drawings
Fig. 1 is known separate stratum fracfturing tubing string schematic diagram.
Fig. 2 is that the utility model does not have the separate stratum fracfturing of obstruction tubing string schematic diagram.
Fig. 3 is that the utility model does not have the separate stratum fracfturing of obstruction apparatus structure schematic diagram.
Fig. 4 is that the utility model does not have and stops up the separate stratum fracfturing device and open sealed sliding cover pressure break upper strata schematic diagram.
Fig. 5 is that the utility model does not have the separate stratum fracfturing of obstruction device lock dog ejection schematic diagram.
Fig. 6 is that the utility model does not have the separate stratum fracfturing of obstruction device stationary pipes string schematic diagram.
Among the figure: 1. oil pipe, 2. sleeve pipe, 3. telescopic compensator, 4. well-flushing switch, 5. tubing nipple, 6. safety joint, 7. packer I, 8. sandblast sliding sleeve, 9. packer II, 10. sandblast sleeve base, 11. setting ball seats, 12. tubing shoe, 13. artificials bottom of a well, 14. lower floors, 15. the upper strata, 28. do not have the separate stratum fracfturing of obstruction device, 31. top connections, 32. pressure cap, 33. lock dogs, 34. fixed covers, 35. blast tube, 36. sealing sliding sleeves, 37. shear pin II, 38. shear pin I, 39. become snapping head, 40. extension pipes, 41. seal head, 42. lower contacts, 43. suspended tubes, 44. steel ball II, 45. steel ball I, 46. central tubes, 47. packing element, 48. packer pipe nipples, 49. sandblast holes, 50. the sandblast hole, 51. through holes, 52. sealing rings.
The specific embodiment
With reference to accompanying drawing, the utility model do not had to stop up the separate stratum fracfturing tubing string and do not have the separate stratum fracfturing of obstruction device be further described.
Fig. 2 does not have the separate stratum fracfturing of obstruction tubing string, stops up separate stratum fracfturing device 28, setting ball seat 11, tubing shoe 12 by telescopic compensator 3, well-flushing switch 4, tubing nipple 5, safety joint 6, packer I7, nothing successively from top to bottom.Packer I7 is positioned on the upper strata 15; There is not the separate stratum fracfturing of obstruction device 28 between the upper strata 15 that needs fracturing work or upper strata 15 and lower floor 14; Setting ball seat 11 and tubing shoe 12 are between upper strata 15 and lower floor 14.
Fig. 3 does not have the schematic diagram that stops up separate stratum fracfturing device 28 among Fig. 2.The utility model does not have the separate stratum fracfturing of obstruction device and mainly comprises three bunch tubes, and outermost layer is the stationary pipes string, and the centre is to move the pipe string, and internal layer is the setting pipe string; Stationary pipes string and move the pipe string, move pipe string and setting pipe string and be matched in clearance between radially, common gap is 0.06～0.12mm, best results when the gap is 0.08～0.10mm.The stationary pipes string mainly comprises (Fig. 6) such as top connection 31, pressure cap 32, blast tube 35, packer short circuit 48, central tube 46, lower contact 42, packing elements 47; Move the pipe string and mainly comprise suspended tubes 43, become snapping head 39, extension pipe 40, seal head 41 etc., will move pipe string axial location by lock dog 33; The setting pipe string mainly comprises fixed cover 34 and sealing sliding sleeve 36, by shear pin II37, shear pin I38 fixed cover 34 and sealing sliding sleeve 36 is fixed on the suspended tubes 43 that moves in the pipe string.
With reference to Fig. 3.Do not have the separate stratum fracfturing of obstruction device and comprise top connection 31, central tube 46, blast tube 35, lower contact 42, sandblast hole 49 is arranged on the blast tube 35, central tube 46 excircles are equipped with packing element 47, central tube 46 lower ends are connected with the upper end of lower contact 42, and central tube 46 upper ends are connected with the lower end of packer short circuit 48; The endoporus of the endoporus of lower contact 42 and packer short circuit 48 is a stepped hole, with central tube (46) axial restraint; The upper end of packer short circuit 48 is connected with blast tube 35 lower ends; The internal thread of blast tube 35 upper ends is connected with pressure cap 32, and the external screw thread of blast tube 35 upper ends is connected with top connection 31.The minimum diameter of bore of pressure cap 32, blast tube 35, central tube 46, lower contact 42 is measure-alike.
Be connected with suspended tubes 43 from top to bottom in turn, become snapping head 39, extension pipe 40, seal head 41 along pressure cap 32, blast tube 35, central tube 46, lower contact 42 endoporus.Sandblast hole 50 is arranged, sandblast hole 49 corresponding installations on sandblast hole 50 and the blast tube 35 on the suspended tubes 43.Between the lower surface of pressure cap 32 and the blast tube 35 upper end internal thread lower step lock dog 33 is installed, lock dog 33 is with suspended tubes 43 axial location.The lower end of suspended tubes 43 is connected with change snapping head 39 upper ends; Become the middle part that snapping head 39 is positioned at central tube 46; Become snapping head 39 lower ends and be connected with extension pipe 40, the lower end of extension pipe 40 is connected with seal head 41; Seal head 41 is positioned at the middle part of lower contact 42.The minimum endoporus of suspended tubes 43, the maximum outside diameter that becomes snapping head 39, extension pipe 40, seal head 41 and pressure cap 32, blast tube 35, central tube 46, lower contact 42 is matched in clearance.The endoporus that becomes snapping head 39 is less than suspended tubes 43 endoporus.Becoming on the snapping head 39 has radial direction through hole 51, and radial direction through hole 51 will become snapping head 39 endoporus and central tube 46 inner surfaces connect, and is used for transmitting pressure to packing element 47.Between seal head 41 and the lower contact 42 sealing ring 52 is installed.
Referring to Fig. 2.Above packer I7 and packing element 47, hydraulic anchor can also be installed.
The utility model carries out the separate stratum fracfturing operation process, at first will not have and stop up the lower end that the separate stratum fracfturing tubing string is connected on oil pipe 1, be lowered in the sleeve pipe 2, to not have stop up separate stratum fracfturing device 28 times between the upper strata 15 that needs fracturing work or upper strata 15 and lower floor 13, setting ball seat 11 and tubing shoe 12 are between upper strata 15 and lower floor 14, begin 14 fracturing works to lower floor, step is as follows:
The first step, packer setting.Pitching in oil pipe 1 after ball is gone into setting ball seat 11, is suppressed to oil pipe, suppresses to certain value, is generally 20MPa, and packer 7 and packing element 47 are set;
In second step, oil pipe continues to boost setting ball seat 11 destroyed and falls into to the artificial bottom of a well 13;
In the 3rd step, carry out lower floor's 14 pressing crack constructions, to the construction end.
To the upper strata fracturing work, step is as follows then:
The first step drops into steel ball I 45 in oil pipe, steel ball I 45 sets on sealing sliding sleeve 36;
In second step, in oil pipe, suppress; When pressure reaches the design load of cutting off shear pin I38, cut off shear pin I38;
In the 3rd step, with reference to Fig. 4, steel ball I45 and sealing sliding sleeve 36 glide along suspended tubes 43, are sitting on the upper surface that becomes snapping head 39, stop that fracturing fluid enters lower floor, open sandblast hole 49 and sandblast hole 50;
In the 4th step, carry out upper strata 15 pressing crack constructions, to the construction end.
Be unimpeded about realizing in the oil pipe at last, step is as follows:
The first step drops into steel ball II44 in oil pipe, steel ball II44 sets on fixed cover 34;
In second step, continue in oil pipe, to suppress; When pressure reaches the design load of cutting off shear pin II37, cut off shear pin II37;
In the 3rd step, steel ball II44 and fixed cover 34 glide along suspended tubes 43, are sitting on sealing sliding sleeve 36 upper surfaces; Lock dog 33 ejects from suspended tubes 43, (with reference to Fig. 5) comes off;
In the 4th step, continue in oil pipe, to suppress; Steel ball II44, fixed cover 34, sealing sliding sleeve 36, suspended tubes 43, change snapping head 39, extension pipe 40, seal head 41 shift out and do not have the separate stratum fracfturing of obstruction tubing string to lower slider, drop down onto artificial bottom of a well 13.
So far, realize not having obstruction separate stratum fracfturing tubing string interior unimpeded (Fig. 6) up and down, tester can be tested injection (or output) section down to the shaft bottom, and coiled tubing carries out the shaft bottom processing down.
The utility model is not only applicable to underground fracture operation in the oil and gas exploitation process, can also be applied to acidizing treatment.
Claims (8)
1. one kind is not had the separate stratum fracfturing of obstruction tubing string, comprise telescopic compensator, well-flushing switch, tubing nipple, safety joint, packer, setting ball seat, tubing shoe, the tubing string that above-mentioned parts is formed be lowered in the sleeve pipe after oil pipe is connected, it is characterized in that: tubing string is followed successively by telescopic compensator (3), well-flushing switch (4), tubing nipple (5), safety joint (6), packer I (7), nothing obstruction separate stratum fracfturing device (28), setting ball seat (11), tubing shoe (12) from top to bottom; Packer I (7) is positioned on the upper strata (15); Not having the separate stratum fracfturing device of obstruction (28) is positioned between upper strata (15) and the lower floor (14).
2. the described nothing of claim 1 is stopped up the separate stratum fracfturing device, comprise top connection, steel ball, central tube, blast tube, lower contact, the sandblast hole is arranged on the blast tube, it is characterized in that: central tube (46) excircle is equipped with packing element (47), central tube (46) lower end is connected with the upper end of lower contact (42), and central tube (46) upper end is connected with the lower end of packer short circuit (48); The endoporus of the endoporus of lower contact (42) and packer short circuit (48) is a stepped hole, with central tube (46) axial restraint; The upper end of packer short circuit (48) is connected with blast tube (35) lower end; The internal thread of blast tube (35) upper end is connected with pressure cap (32), and the external screw thread of blast tube (35) upper end is connected with top connection (31); The minimum diameter of bore of pressure cap (32), blast tube (35), central tube (46), lower contact (42) is measure-alike; Be connected with suspended tubes (43) from top to bottom in turn, become snapping head (39), extension pipe (40), seal head (41) along pressure cap (32), blast tube (35), central tube (46), lower contact (42) endoporus; Sandblast hole (50) is arranged on the suspended tubes (43), and sandblast hole (50) go up the corresponding installation in sandblast hole (49) with blast tube (35); Between the lower surface of pressure cap (32) and blast tube (35) the upper end internal thread lower step lock dog (33) is installed, lock dog (33) is with suspended tubes (43) axial location; The lower end of suspended tubes (43) is connected with change snapping head (39) upper end, become the middle part that snapping head (39) is positioned at central tube (46), becoming snapping head (39) lower end is connected with extension pipe (40), the lower end of extension pipe (40) is connected with seal head (41), and seal head (41) is positioned at the middle part of lower contact (42); The minimum endoporus of suspended tubes (43), the maximum outside diameter that becomes snapping head (39), extension pipe (40), seal head (41) and pressure cap (32), blast tube (35), central tube (46), lower contact (42) is matched in clearance; The endoporus that becomes snapping head (39) is less than suspended tubes (43) endoporus; Suspended tubes (43) endoporus fixedly mounts fixed cover (34) and sealing sliding sleeve (36) from top to bottom successively, shear pin II (37) and shear pin I (38) are fixed on fixed cover (34) and sealing sliding sleeve (36) on suspended tubes (43) endoporus respectively, and the endoporus of sealing sliding sleeve (36) is less than the endoporus of fixed cover (34); Sealing sliding sleeve (36) is sealed sandblast hole (50); Fixed cover (34) is radially fixing with lock dog (33); Sandblast hole (50) bottom and become distance between snapping head (39) upper surface greater than the length of sealing sliding sleeve (36).
3. nothing according to claim 2 is stopped up the separate stratum fracfturing device, it is characterized in that: when steel ball I (45) sets on described sealing sliding sleeve (36), suppress and cut off shear pin I (38), steel ball I (45) and sealing sliding sleeve (36) are sitting on the upper surface that becomes snapping head (39) after gliding along suspended tubes (43).
4. nothing according to claim 3 is stopped up the separate stratum fracfturing device, it is characterized in that: when steel ball II (44) sets on described fixed cover (34), suppress and cut off shear pin II (37), steel ball II (44) and fixed cover (34) glide along suspended tubes (43), are sitting on sealing sliding sleeve (36) upper surface; Lock dog (33) ejects from suspended tubes (43), comes off; Suppress; Steel ball II (44), fixed cover (34), sealing sliding sleeve (36), suspended tubes (43), change snapping head (39), extension pipe (40), seal head (41) shift out and do not have the separate stratum fracfturing of obstruction tubing string to lower slider.
5. nothing according to claim 2 is stopped up the separate stratum fracfturing device, it is characterized in that: the gap between the minimum endoporus of described suspended tubes (43), the maximum outside diameter that becomes snapping head (39), extension pipe (40), seal head (41) and pressure cap (32), blast tube (35), central tube (46), lower contact (42) is 0.06～0.12mm.
6. nothing according to claim 5 is stopped up the separate stratum fracfturing device, it is characterized in that: the gap between the minimum endoporus of described suspended tubes (43), the maximum outside diameter that becomes snapping head (39), extension pipe (40), seal head (41) and pressure cap (32), blast tube (35), central tube (46), lower contact (42) is 0.08～0.10mm.
7. nothing according to claim 6 is stopped up the separate stratum fracfturing device, it is characterized in that: radial direction through hole (51) is arranged on the described change snapping head (39), and radial direction through hole (51) will become snapping head (39) endoporus and central tube (46) inner surface connects.
8. nothing according to claim 7 is stopped up the separate stratum fracfturing device, it is characterized in that: between described seal head (41) and the lower contact (42) sealing ring (52) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620176007 CN200993001Y (en) | 2006-12-29 | 2006-12-29 | Non-clogging stratified fracturing pipe string and its non-clogging stratified fracturing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620176007 CN200993001Y (en) | 2006-12-29 | 2006-12-29 | Non-clogging stratified fracturing pipe string and its non-clogging stratified fracturing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200993001Y true CN200993001Y (en) | 2007-12-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620176007 Expired - Fee Related CN200993001Y (en) | 2006-12-29 | 2006-12-29 | Non-clogging stratified fracturing pipe string and its non-clogging stratified fracturing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200993001Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182438A (en) * | 2011-06-03 | 2011-09-14 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Layered fracturing technology for variable-length graded sliding sleeve |
| CN103498656A (en) * | 2013-10-22 | 2014-01-08 | 中国石油天然气股份有限公司 | Falcon trough equal-diameter multi-layer fracturing string |
| CN104563996A (en) * | 2013-10-29 | 2015-04-29 | 中国石油天然气股份有限公司 | Dragging fracturing string under pressure and its fracturing method |
| CN106939784A (en) * | 2017-01-13 | 2017-07-11 | 上海全泽能源科技有限公司 | The positioning acidizing device of stratified injection well |
| CN110017133A (en) * | 2019-05-23 | 2019-07-16 | 广州海洋地质调查局 | A kind of test of horizontal well production profile and shutoff method and device |
| CN113790050A (en) * | 2021-08-03 | 2021-12-14 | 贵州盘江煤层气开发利用有限责任公司 | Coal seam fracturing equipment and method based on liquid CO2 phase change |
-
2006
- 2006-12-29 CN CN 200620176007 patent/CN200993001Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182438A (en) * | 2011-06-03 | 2011-09-14 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Layered fracturing technology for variable-length graded sliding sleeve |
| CN102182438B (en) * | 2011-06-03 | 2013-07-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Layered fracturing technology for variable-length graded sliding sleeve |
| CN103498656A (en) * | 2013-10-22 | 2014-01-08 | 中国石油天然气股份有限公司 | Falcon trough equal-diameter multi-layer fracturing string |
| CN103498656B (en) * | 2013-10-22 | 2016-09-07 | 中国石油天然气股份有限公司 | Falcon trough equal-diameter multi-layer fracturing string |
| CN104563996A (en) * | 2013-10-29 | 2015-04-29 | 中国石油天然气股份有限公司 | Dragging fracturing string under pressure and its fracturing method |
| CN106939784A (en) * | 2017-01-13 | 2017-07-11 | 上海全泽能源科技有限公司 | The positioning acidizing device of stratified injection well |
| CN110017133A (en) * | 2019-05-23 | 2019-07-16 | 广州海洋地质调查局 | A kind of test of horizontal well production profile and shutoff method and device |
| CN110017133B (en) * | 2019-05-23 | 2024-05-10 | 广州海洋地质调查局 | Method and device for testing output profile of horizontal well and plugging water |
| CN113790050A (en) * | 2021-08-03 | 2021-12-14 | 贵州盘江煤层气开发利用有限责任公司 | Coal seam fracturing equipment and method based on liquid CO2 phase change |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: DAGANG OILFIELD GROUP DRILLING TECHNOLOGY RESEARCH INSTITUTE ¬ |
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| CU01 | Correction of utility model patent |
Correction item: Co-patentee Correct: Drilling Technology Research Institute of Dagang Oilfield Group Number: 51 Page: The title page Volume: 23 |
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| CU03 | Correction of utility model patent gazette |
Correction item: Co-patentee Correct: Drilling Technology Research Institute of Dagang Oilfield Group Number: 51 Volume: 23 |
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| ERR | Gazette correction |
Free format text: CORRECT: CO-PATENTEE; FROM: NONE ¬ TO: DAGANG OILFIELD GROUP DRILLING TECHNOLOGY RESEARCH INSTITUTE ¬ |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20151229 |
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| EXPY | Termination of patent right or utility model |