CN103470241B - Two bunches of jetting tubing strings and two bunches of jetting annular fracturing methods - Google Patents
Two bunches of jetting tubing strings and two bunches of jetting annular fracturing methods Download PDFInfo
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- CN103470241B CN103470241B CN201310366535.6A CN201310366535A CN103470241B CN 103470241 B CN103470241 B CN 103470241B CN 201310366535 A CN201310366535 A CN 201310366535A CN 103470241 B CN103470241 B CN 103470241B
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- spray gun
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- tubing string
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000003129 oil well Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Two bunch jetting tubing strings provided by the invention and two bunches of jetting annular fracturing methods, because CTY-211 packer carries ball-and-seat device, the formation of the liquid in sliding sleeve spray gun and single-stage spray gun high-speed jet can be made to carry out perforation by increasing the discharge capacity pressure increased in oil pipe.End to be perforated, 1.5 meters, upper lifting pipe post, then transfers, until pressure meter display pressure is changed to 8 ~ 10 tons, prove packer setting, after then sitting well head upper lifting pipe post, sliding sleeve spray gun is in blocked state, injects sand liquid simultaneously carry out pressure break from oil jacket annular space and oil pipe.The sand liquid of oil pipe can only carry out pressure break by single-stage spray gun below and can prevent sand plug, reduces frictional resistance, greatly improves the life-span of nozzle.Oil jacket annular space can carry out the pressure break of huge discharge, improves the efficiency of pressure break, once can bore multiple fracturing down, reduces dangerous generation.Then cleaning tubing and oil jacket annular space is come from oil jacket annular space fluid by injecting liquid from oil pipe after pressure break terminates.
Description
Technical field
The present invention relates to oil well fracturing operation technical field, be specifically related to two bunch jetting tubing strings and two bunches of jetting annular fracturing methods.
Background technology
In the past few years, from " volume fracturing " theory, carried out the two bunch hydraulic jetting fracturing of horizontal well, not only its microseism band formed supplements but also overlapping mutually, can increase the drainage volume of oil well horizontal well.Correctional effect is further improved.Along with increase, the well depth increase of the oil well horizontal well jetting pressing crack construction number of plies, by the impact of packer setting performance and spraycan abrasion-resistance, two bunch spraycan can not farthest be played at present, cause playing lower tubular column frequently in work progress, change drilling tool, add the non-cutting time of construction, and the risk increased in lower tubular column process and environment pollution.
Specifically, in two bunch pressure breaks of current oil well horizontal well, the defect of existence is: 1. the material property of end packer determines that its restting number of times can not be a lot, 2. the jeting effect of spray gun not as above spray gun below, and easily causes sand plug.3. the more risks that can increase accident of the number of times of handling tubing string.4. fracturing fluid enters from oil pipe, and discharge capacity can be restricted.
Summary of the invention
The object of this invention is to provide a kind of two bunch jetting tubing strings and two bunches of jetting annular fracturing methods, lower tubular column is played frequently existing for the two bunch pressure breaks overcoming current oil well horizontal well, change drilling tool, the non-cutting time of construction is long, having a big risk and the defect of environment pollution in lower tubular column process.
For this reason, the invention provides a kind of two bunch jetting tubing string, comprise the packer be arranged in turn on tubing string, single-stage spray gun and sliding sleeve spray gun, and packer is arranged on the end, one end of this tubing string, single-stage spray gun is arranged between packer and sliding sleeve spray gun, it is characterized in that: described packer is the packer carrying ball-and-seat.
Described packer is CTY-211 packer.
A described two bunch jetting tubing string carries out two bunch jetting annular fracturing method, it is characterized in that, comprises the following steps:
1), to tubing string carry out through wash well, well-flushing is consistent to importing and exporting water colour, wellbore pressure test 20Mpa, voltage stabilizing 30min, and pressure drop is no more than 0.7Mpa;
2), packer, single-stage spray gun and sliding sleeve spray gun is connected in turn by tubing string, and packer is arranged on the bottom terminal ends of this tubing string, single-stage spray gun is arranged between packer and sliding sleeve spray gun, complete the assembling of two bunch jetting tubing string, then will assemble a two bunch jetting tubing string to go into the well design attitude, well head and surface line are installed, and pressure testing;
3), make sliding sleeve spray gun in running order, guarantee that packer is in and non-ly set state, pumping liquid in tubing string, make the liquid in sliding sleeve spray gun and single-stage spray gun form high-speed jet and carry out perforation;
4), end to be perforated, 1.5 meters, upper lifting pipe post, then transfers, until pressure meter display pressure is changed to 8 ~ 10 tons, proves packer setting, then sit well head, after upper lifting pipe post, sliding sleeve spray gun (3) is in blocked state, injects sand liquid simultaneously carry out pressure break from oil jacket annular space and oil pipe.
After pressure break terminates, by from oil pipe inject liquid then from oil jacket annular space fluid, come cleaning tubing and oil jacket annular space.
Carrying out through wash well to tubing string in described step 1) is utilize the drift size gauge tool of φ 118mm to carry out drifting to artificial bottom of a well.
The invention has the beneficial effects as follows: the CTY-211 packer of employing has good heat resisting and pressure resisting and restting performance, extend application life, sliding sleeve spray gun normal condition belongs to opening, facilitates perforation, when pressure break is carried out, due to handling tubing string packer setting, sliding sleeve spray gun belongs to closed condition, reduces the possibility of sand plug between single-stage spray gun and sliding sleeve spray gun, reduces frictional resistance, improve discharge capacity, greatly improve the life-span of nozzle; Reduce of the fracturing fluid performance requirement, carried out by annular fracturing and oil pipe pressure break simultaneously, improve the efficiency of pressure break, once can bore multiple fracturing down, reduce dangerous generation.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is two bunch jetting tubular column structure schematic diagrames.
1, packer; 2, single-stage spray gun; 3, sliding sleeve spray gun; 4, tubing string; 5, centralizer.
Detailed description of the invention
In order to overcome current oil well horizontal well two bunch pressure breaks existing for play lower tubular column frequently, change drilling tool, the non-cutting time of construction is long, having a big risk and the defect of environment pollution in a lower tubular column process.
For this reason, the invention provides the two bunch jetting tubing strings shown in a kind of Fig. 1, the outer end comprising the packer 1(packer 1 be arranged in turn on tubing string is provided with centralizer 5), single-stage spray gun 2 and sliding sleeve spray gun 3, and packer 1 is arranged on the end, one end of this tubing string 4, single-stage spray gun 2 is arranged between packer 1 and sliding sleeve spray gun 3, packer 1 is the CTY-211 packer carrying ball-and-seat, and its packing element high temperature high voltage resistant, extends the application life of instrument.
Provide a kind of pair bunch jetting tubing string that utilizes simultaneously and carry out two bunch jetting annular fracturing method, comprise the following steps:
1), to tubing string carry out through wash well, well-flushing is consistent to importing and exporting water colour, wellbore pressure test 20Mpa, voltage stabilizing 30min, and pressure drop is no more than 0.7Mpa;
2), packer 1, single-stage spray gun 2 and sliding sleeve spray gun 3 is connected in turn by tubing string, and packer 1 is arranged on the bottom terminal ends of this tubing string, single-stage spray gun 2 is arranged between packer 1 and sliding sleeve spray gun 3, complete the assembling of two bunch jetting tubing string, then will assemble a two bunch jetting tubing string to go into the well design attitude, well head and surface line are installed, and pressure testing;
3), make sliding sleeve spray gun 3 in running order, guarantee that packer 1 is in and non-ly set state, pumping liquid in tubing string, make the liquid of sliding sleeve spray gun 3 and single-stage spray gun 2 li form high-speed jet and carry out perforation;
4), end to be perforated, 1.5 meters, upper lifting pipe post, then transfers, until pressure meter display pressure is changed to 8 ~ 10 tons, proves that packer 1 sets, then sit well head, after upper lifting pipe post, sliding sleeve spray gun 3 is in blocked state, injects sand liquid simultaneously carry out pressure break from oil jacket annular space and oil pipe.
After pressure break terminates, by from oil pipe inject liquid then from oil jacket annular space fluid, come cleaning tubing and oil jacket annular space (space between oil pipe external diameter and casing inner diameter).
Carrying out through wash well to tubing string in step 1) is utilize the drift size gauge tool of φ 118mm to carry out drifting to artificial bottom of a well.
In sum, be not difficult to find out, two bunch jetting tubing strings that the present embodiment provides and two bunches of jetting annular fracturing methods, because CTY-211 packer carries ball-and-seat device, so the formation of the liquid in sliding sleeve spray gun and single-stage spray gun high-speed jet can be made to carry out perforation by increasing the discharge capacity pressure increased in oil pipe.End to be perforated, 1.5 meters, upper lifting pipe post, then transfers, until pressure meter display pressure is changed to 8 ~ 10 tons, prove packer setting, after then sitting well head upper lifting pipe post, sliding sleeve spray gun is in blocked state, injects sand liquid simultaneously carry out pressure break from oil jacket annular space and oil pipe.The sand liquid of oil pipe can only carry out pressure break by single-stage spray gun below and can prevent sand plug, reduces frictional resistance, greatly improves the life-span of nozzle.Oil jacket annular space can carry out the pressure break of huge discharge, improves the efficiency of pressure break, once can bore multiple fracturing down, reduces dangerous generation.Then cleaning tubing and oil jacket annular space (space between oil pipe external diameter and casing inner diameter) is come from oil jacket annular space fluid by injecting liquid from oil pipe after pressure break terminates.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (4)
1. a two bunch jetting tubing string carries out two bunch jetting annular fracturing method, it is characterized in that, comprise the packer (1) be arranged in turn on tubing string, single-stage spray gun (2) and sliding sleeve spray gun (3), and packer (1) is arranged on the end, one end of this tubing string, single-stage spray gun (2) is arranged between packer (1) and sliding sleeve spray gun (3), it is characterized in that: described packer (1) is the packer carrying ball-and-seat;
Comprise the following steps:
1), to tubing string carry out through wash well, well-flushing is consistent to importing and exporting water colour, wellbore pressure test 20Mpa, voltage stabilizing 30min, and pressure drop is no more than 0.7Mpa;
2), packer (1), single-stage spray gun (2) and sliding sleeve spray gun (3) is connected in turn by tubing string, and packer (1) is arranged on the bottom terminal ends of this tubing string, single-stage spray gun (2) is arranged between packer (1) and sliding sleeve spray gun (3), complete the assembling of two bunch jetting tubing string, then will assemble a two bunch jetting tubing string to go into the well design attitude, well head and surface line are installed, and pressure testing;
3), make sliding sleeve spray gun (3) in running order, guarantee that packer (1) is in and non-ly set state, pumping liquid in tubing string, make sliding sleeve spray gun (3) and the inner liquid of single-stage spray gun (2) form high-speed jet and carry out perforation;
4), end to be perforated, 1.5 meters, upper lifting pipe post, then transfer, until pressure meter display pressure is changed to 8 ~ 10 tons, prove that packer (1) sets, then sit well head, after upper lifting pipe post, sliding sleeve spray gun (3) is in blocked state, injects sand liquid simultaneously carry out pressure break from oil jacket annular space and oil pipe.
2. an a kind of two bunch jetting tubing string as claimed in claim 1 carries out two bunch jetting annular fracturing method, it is characterized in that: described packer (1) is CTY-211 packer.
3. bunch jetting annular fracturing method as claimed in claim 1 two, is characterized in that, after pressure break terminates, by inject from oil pipe liquid then from oil jacket annular space fluid, come cleaning tubing and oil jacket annular space.
4. two bunch jetting annular fracturing method as claimed in claim 1, it is characterized in that, carrying out through wash well to tubing string in described step 1) is utilize the drift size gauge tool of φ 118mm to carry out drifting to artificial bottom of a well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310366535.6A CN103470241B (en) | 2013-08-21 | 2013-08-21 | Two bunches of jetting tubing strings and two bunches of jetting annular fracturing methods |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310366535.6A CN103470241B (en) | 2013-08-21 | 2013-08-21 | Two bunches of jetting tubing strings and two bunches of jetting annular fracturing methods |
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| Publication Number | Publication Date |
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| CN103470241A CN103470241A (en) | 2013-12-25 |
| CN103470241B true CN103470241B (en) | 2016-02-03 |
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| CN106761645B (en) * | 2016-12-28 | 2019-06-04 | 北京华晖盛世能源技术股份有限公司 | The structure of oil/gas well prospect pit hydraulic slotted liner technique test technology tubing string |
| CN110685611B (en) * | 2018-07-05 | 2021-06-15 | 中国石油化工股份有限公司 | Pipe column and method for abrasive perforation and soluble bridge plug combined double-cluster fracturing |
| CN111456691A (en) * | 2020-05-27 | 2020-07-28 | 中国石油天然气集团有限公司 | Method and device for single-section double-cluster continuous oil pipe bottom seal dragging fracturing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3270814A (en) * | 1964-01-23 | 1966-09-06 | Halliburton Co | Selective completion cementing packer |
| CN201090188Y (en) * | 2007-09-18 | 2008-07-23 | 中国石油天然气股份有限公司 | Fixed pipe column layering hydraulic jet perforation and fracturing integrated pipe column |
| CN201144683Y (en) * | 2008-01-16 | 2008-11-05 | 中国石油化工股份有限公司西南油气分公司工程技术研究院 | Fracturing sliding bush sandblast |
| CN101270639A (en) * | 2008-04-30 | 2008-09-24 | 中国石油天然气股份有限公司 | Packer packing multilayer hydraulic sand blasting perforation and fracturing integrated process method |
| CN202108493U (en) * | 2011-05-25 | 2012-01-11 | 中国石油天然气股份有限公司 | Horizontal well hydraulic jet multi-cluster staged fracturing string |
| CN203476307U (en) * | 2013-08-21 | 2014-03-12 | 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 | Double-cluster hydraulic jetting string |
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Effective date of registration: 20201106 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1207 Patentee before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING COMPANY LIMITED CHANGQING DOWNHOLE TECHNOLOGY Co. |