CN102619495A - Multi-section delaminated fracturing tool string for vertical shaft immovable pipe column - Google Patents
Multi-section delaminated fracturing tool string for vertical shaft immovable pipe column Download PDFInfo
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- CN102619495A CN102619495A CN2012101156041A CN201210115604A CN102619495A CN 102619495 A CN102619495 A CN 102619495A CN 2012101156041 A CN2012101156041 A CN 2012101156041A CN 201210115604 A CN201210115604 A CN 201210115604A CN 102619495 A CN102619495 A CN 102619495A
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Abstract
The invention discloses a multi-section delaminated fracturing tool string for a vertical shaft immovable pipe column. The multi-section delaminated fracturing tool string comprises a casing pipe, an oil pipe, a safety joint, a top packer, steel balls and at least four impulse sand blasting anchored packers, wherein the top packer, the safety joint, the steel balls and at least four impulse sand blasting anchored packers are respectively positioned in the casing pipe; one end of the casing pipe is a fracturing end; the other end of the casing pipe is a connecting end of the oil pipe; the fracturing ends of the impulse sand blasting anchored packers align with the fracturing end of the casing pipe and are sequentially connected; one steel ball is arranged between two adjacent impulse sand blasting anchored packers; the impulse sand blasting anchored packer furthest to the fracturing end of the casing pipe is connected with the top packer; and one steel ball is arranged between the impulse sand blasting anchored packer furthest to the fracturing end of the casing pipe and the top packer. According to the multi-section delaminated fracturing tool string disclosed by the invention, a pretreatment layer level can be forced to be segmented; the fracturing lower than six layer sections of pipe columns can be realized by the immovable pipe column, and thus the fracturing development effect is greatly improved; secondary pollution from an oil-gas reservoir can be effectively prevented, the work efficiency is increased, the construction cost is saved and the construction work period is shortened; and meanwhile, the safety performance of a fracturing process is also improved.
Description
Technical field
The present invention relates to oil recovery technique field, oil field, relate in particular to a kind of straight well fixed tubular column multistage separate stratum fracfturing tool string.
Background technology
Along with the development that deepens continuously of oil field prospecting development, the reserves of hyposmosis, unconventional oil-gas reservoir are more and more, and reserves are effectively employed and development difficulty continues to increase, and stimulation technology constantly is faced with new challenges.When multiple fracturing, need be lowered to many times fracturing string repeatedly usually, not only time-consuming but also require great effort, also reservoir is damaged.Domestic existing straight well fracturing tool string fracturing without pulling string can be pressed four layers at most, can't satisfy the needs of oil field development.
Summary of the invention
The objective of the invention is to design a kind of novel straight well fixed tubular column multistage separate stratum fracfturing tool string, address the above problem.
To achieve these goals, the technical scheme of the present invention's employing is following:
A kind of straight well fixed tubular column multistage separate stratum fracfturing tool string; Comprise sleeve pipe, oil pipe, safety joint, top packer, steel ball and at least four pilot sandblast anchoring packers, said top packer, said safety joint, said steel ball and said pilot sandblast anchoring packer all are positioned at said sleeve pipe; One end of said sleeve pipe is made as the pressure break end, and the other end is made as the link of said oil pipe; The pressure break end of said pilot sandblast anchoring packer is aimed at the pressure break end of said sleeve pipe and is connected successively, faces mutually between two said pilot sandblast anchoring packers a steel ball is set; The pressure break end said pilot sandblast anchoring packer farthest of the said sleeve pipe of distance links to each other with said top packer and a said steel ball also is set between the two.
Said top packer links to each other with said oil pipe through said safety joint.
The flow nipple internal diameter of all said pilot sandblast anchoring packers is Φ 40.5mm.
Said pilot sandblast anchoring packer is six.
Said pilot sandblast anchoring packer is the device of one for collection pilot, sealing and grappling.
Said pilot sandblast anchoring packer is a K344 type pilot sandblast anchoring packer.
The so-called K344 type of the present invention pilot sandblast anchoring packer is meant my on 01 12nd, 2012 described pilot sandblast anchoring packers of utility model patent " the pilot sandblast anchoring packer that a kind of fracturing without pulling string multilayer is used " (application number 201220011867.3) to the application of China national Patent Office of company.Its flow nipple and flow nipple seat because of having used wear-resisting wolfram steel material makes the classification of steel ball increase, and fixed tubular column can be pressed six layers, even more than six layers.
Beneficial effect of the present invention can be summed up as follows:
1; The present invention utilizes the top packer and pilot sandblast anchoring packer and supporting downhole tool can be to pretreatment layer position fragment-force; Through the mode that pitching (steel ball) is skidded and overlapped, fixed tubular column can be realized the pressure break below six intervals, thereby has improved the effect of fracturing developing greatly.
2, tool string of the present invention is compared with conventional fracturing tool string, can effectively prevent the secondary pollution of oil-gas reservoir, has improved operating efficiency, practices thrift construction cost and shortens construction period, has also improved the security performance of fracturing technology simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Among the figure: 1-oil pipe, 2-sleeve pipe, 3-safety joint, 4-top packer, 5-Pyatyi steel ball; 6-Pyatyi pilot sandblast anchoring packer, 7-level Four steel ball; 8-level Four pilot sandblast anchoring packer, 9-grade III steel ball; Three grades of pilot sandblasts of 10-anchoring packer, 11-secondary steel ball, 12-secondary pilot sandblast anchoring packer, 13-one-level steel ball, 14-one-level pilot sandblast anchoring packer.
The specific embodiment
Clearer for technical problem, technical scheme and beneficial effect that the present invention is solved, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The invention discloses a kind of straight well fixed tubular column multistage separate stratum fracfturing tool string; Comprise oil pipe 1, sleeve pipe 2, safety joint 3, top packer 4, steel ball and at least four pilot sandblast anchoring packers, said top packer 4, said safety joint 3, said steel ball and said pilot sandblast anchoring packer all are positioned at said sleeve pipe 2; One end of said sleeve pipe 2 is made as the pressure break end, and the other end is made as the link of said oil pipe 1; The pressure break end of said pilot sandblast anchoring packer is aimed at the pressure break end of said sleeve pipe and is connected successively, faces mutually between two said pilot sandblast anchoring packers a steel ball is set; The pressure break end said pilot sandblast anchoring packer farthest of the said sleeve pipe 2 of distance links to each other with said top packer 4 and a said steel ball also is set between the two; Said top packer 4 connects 3 through said safety and links to each other with said oil pipe 1.In the embodiment that is more preferably, said pilot sandblast anchoring packer is six, and the flow nipple internal diameter of all said pilot sandblast anchoring packers is Φ 40.5mm; Said pilot sandblast anchoring packer is a K344 type pilot sandblast anchoring packer, for collection pilot, sealing and grappling are the device of one.
In the specific embodiment as shown in Figure 1; A kind of straight well fixed tubular column multistage separate stratum fracfturing tool string, it comprises oil pipe 1, sleeve pipe 2, safety joint 3, top packer 4, Pyatyi steel ball 5, Pyatyi pilot sandblast anchoring packer 6, level Four steel ball 7; Level Four pilot sandblast anchoring packer 8, grade III steel ball 9; Three grades of pilot sandblast anchoring packers 10, secondary steel ball 11, secondary pilot sandblast anchoring packer 12, one-level steel ball 13, one-level pilot sandblast anchoring packer 14; Safety joint is connected with an oil pipe with top packer; The flow nipple internal diameter of all packers is Φ 40.5mm, and a plurality of pilot sandblast anchoring packer collection pilots, sealing, grappling are integrated, and packers at different levels are K344 and pull.Connect with oil pipe or oil pipe short circuit between each pilot sandblast anchoring packer, it mainly is used in the multiple fracturing of oil field straight well section, has the construction cost of saving and shortens construction period, advantages such as the security performance of raising fracturing technology and fracturing developing effect.
On-the-spot kit oil scraper pipe 1, safety joint 3, top packer 4, Pyatyi steel ball 5 that pressure break is six layers; Pyatyi pilot sandblast anchoring packer 6, level Four steel ball 7; Dead level pilot sandblast anchoring packer 8, grade III steel ball 9; Three grades of pilot sandblast anchoring packers 10, secondary steel ball 11, secondary pilot sandblast anchoring packer 12, one-level steel ball 13, one-level pilot sandblast anchoring packer 14.Oil pipe of safety joint 2 and top packer 4 usefulness is connected, and connects with oil pipe or oil pipe short circuit between top packer 4, the pilot sandblast anchoring packer at different levels.
During site operation, at first will block the interior above-mentioned on-the-spot instrument of distance on ground and connect, said on-the-spot instrument needs the scraping drifting before going into the well, connect with oil pipe 1 then, is lowered into and presets the replacing fracture well head, the beginning pressure break.The pressure break reservoir without pitching (promptly throw and establish said steel ball), and only carries out normal pressure break for the moment; After reservoir one has been pressed, throw one-level steel ball 13 to well head, ball finally drops on the one-level pilot sandblast anchoring packer 14, and said steel ball 13 is suppressed the sliding sleeve on the said one-level pilot sandblast anchoring packer 14, and it is opened, and simultaneously the passage in the oil pipe of bottom is blocked; Improve discharge capacity then, and normal pressure break reservoir two; Reservoir two has pressed the back to throw secondary steel ball 11 to well head, and ball finally drops on the secondary pilot sandblast anchoring packer 12, suppresses the sliding sleeve on the secondary pilot sandblast packer 12 is opened, and simultaneously bottom oil pipe internal channel is blocked, and improves the normal pressure break reservoir three of discharge capacity; Reservoir three has pressed the back well head to throw grade III steel ball 9, and ball finally drops on three grades of pilot sandblast anchoring packers 10, suppresses the sliding sleeve on three grades of pilot sandblast anchoring packers 10 is opened, and simultaneously bottom oil pipe internal channel is blocked, and improves the normal pressure break reservoir four of discharge capacity; Reservoir four has pressed the back well head to throw level Four steel ball 7, and ball finally drops on the level Four pilot sandblast anchoring packer 8, suppresses the sliding sleeve on the level Four pilot sandblast anchoring packer 8 is opened, and simultaneously bottom oil pipe internal channel is blocked, and improves the normal pressure break reservoir five of discharge capacity; Reservoir five has pressed the back well head to throw Pyatyi steel ball 5, and ball finally drops on the Pyatyi pilot sandblast anchoring packer 6, suppresses the sliding sleeve on the Pyatyi pilot sandblast anchoring packer 6 is opened, and simultaneously bottom oil pipe internal channel is blocked, and improves the normal pressure break reservoir six of discharge capacity.Steel ball can chase after ball with the discharge capacity that is not more than 0.8m3/min after going into well during each layer of pressure break, and the time that chases after ball is confirmed according to the volume of the oil pipe of ball seat position.After putting in place, ball has a tangible pressure display on the pressure break curve.
More than through the detailed description of concrete and preferred embodiment the present invention; But those skilled in the art should be understood that; The present invention is not limited to the above embodiment; All within spirit of the present invention and principle, any modification of being done, be equal to replacement etc., all should be included within protection scope of the present invention.
Claims (6)
1. straight well fixed tubular column multistage separate stratum fracfturing tool string; It is characterized in that: comprise sleeve pipe, oil pipe, safety joint, top packer, steel ball and at least four pilot sandblast anchoring packers, said top packer, said safety joint, said steel ball and said pilot sandblast anchoring packer all are positioned at said sleeve pipe; One end of said sleeve pipe is made as the pressure break end, and the other end is made as the link of said oil pipe; The pressure break end of said pilot sandblast anchoring packer is aimed at the pressure break end of said sleeve pipe and is connected successively, faces mutually between two said pilot sandblast anchoring packers a steel ball is set; The pressure break end said pilot sandblast anchoring packer farthest of the said sleeve pipe of distance links to each other with said top packer and a said steel ball also is set between the two.
2. straight well fixed tubular column multistage separate stratum fracfturing tool string according to claim 1, it is characterized in that: said top packer links to each other with said oil pipe through said safety joint.
3. straight well fixed tubular column multistage separate stratum fracfturing tool string according to claim 1 and 2, it is characterized in that: the flow nipple internal diameter of all said pilot sandblast anchoring packers is Φ 40.5mm.
4. straight well fixed tubular column multistage separate stratum fracfturing tool string according to claim 1 and 2, it is characterized in that: said pilot sandblast anchoring packer is six.
5. straight well fixed tubular column multistage separate stratum fracfturing tool string according to claim 1 and 2 is characterized in that: said pilot sandblast anchoring packer is the device of one for collection pilot, sealing and grappling.
6. straight well fixed tubular column multistage separate stratum fracfturing tool string according to claim 1 and 2 is characterized in that: said pilot sandblast anchoring packer is a K344 type pilot sandblast anchoring packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101156041A CN102619495A (en) | 2012-04-19 | 2012-04-19 | Multi-section delaminated fracturing tool string for vertical shaft immovable pipe column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101156041A CN102619495A (en) | 2012-04-19 | 2012-04-19 | Multi-section delaminated fracturing tool string for vertical shaft immovable pipe column |
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| CN102619495A true CN102619495A (en) | 2012-08-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852504A (en) * | 2012-09-13 | 2013-01-02 | 中国石油天然气股份有限公司 | Immobile pipe column multi-layer fracturing tool string for vertical shaft |
| CN103195402A (en) * | 2013-04-12 | 2013-07-10 | 中联煤层气国家工程研究中心有限责任公司 | Staged fracturing system and staged fracturing method of coal-bed gas well |
| CN103883300A (en) * | 2014-03-25 | 2014-06-25 | 中国石油集团渤海钻探工程有限公司 | Multistage fracturing and exploitation control method |
| CN103912257A (en) * | 2014-04-28 | 2014-07-09 | 中国石油集团渤海钻探工程有限公司 | Pressure dragging layering fracturing device |
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| CN201372774Y (en) * | 2009-02-23 | 2009-12-30 | 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 | Multistage hydraulic jetting and fracturing technological tubular column |
| CN201513162U (en) * | 2009-08-20 | 2010-06-23 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Multilayer-section fracturing device of releasing tubular column |
| CN201574721U (en) * | 2009-12-18 | 2010-09-08 | 沈阳大华测控技术有限公司 | Horizontal well and vertical well fracture packer |
| EP2295715A2 (en) * | 2009-07-27 | 2011-03-16 | BJ Services Company LLC | Bottom hole assembly with ported completion and methods of fracturing therewith |
| US20120048559A1 (en) * | 2010-08-31 | 2012-03-01 | Schlumberger Technology Corporation | Methods for completing multi-zone production wells using sliding sleeve valve assembly |
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2012
- 2012-04-19 CN CN2012101156041A patent/CN102619495A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201372774Y (en) * | 2009-02-23 | 2009-12-30 | 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 | Multistage hydraulic jetting and fracturing technological tubular column |
| EP2295715A2 (en) * | 2009-07-27 | 2011-03-16 | BJ Services Company LLC | Bottom hole assembly with ported completion and methods of fracturing therewith |
| CN201513162U (en) * | 2009-08-20 | 2010-06-23 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Multilayer-section fracturing device of releasing tubular column |
| CN201574721U (en) * | 2009-12-18 | 2010-09-08 | 沈阳大华测控技术有限公司 | Horizontal well and vertical well fracture packer |
| US20120048559A1 (en) * | 2010-08-31 | 2012-03-01 | Schlumberger Technology Corporation | Methods for completing multi-zone production wells using sliding sleeve valve assembly |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852504A (en) * | 2012-09-13 | 2013-01-02 | 中国石油天然气股份有限公司 | Immobile pipe column multi-layer fracturing tool string for vertical shaft |
| CN103195402A (en) * | 2013-04-12 | 2013-07-10 | 中联煤层气国家工程研究中心有限责任公司 | Staged fracturing system and staged fracturing method of coal-bed gas well |
| CN103195402B (en) * | 2013-04-12 | 2015-12-09 | 中联煤层气国家工程研究中心有限责任公司 | A kind of system and method for staged fracturing of coal bed gas well |
| CN103883300A (en) * | 2014-03-25 | 2014-06-25 | 中国石油集团渤海钻探工程有限公司 | Multistage fracturing and exploitation control method |
| CN103912257A (en) * | 2014-04-28 | 2014-07-09 | 中国石油集团渤海钻探工程有限公司 | Pressure dragging layering fracturing device |
| CN103912257B (en) * | 2014-04-28 | 2016-04-06 | 中国石油集团渤海钻探工程有限公司 | A kind of dragging multiple fracturing device with pressure |
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Application publication date: 20120801 |