CN103375159B - A kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string - Google Patents
A kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string Download PDFInfo
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- CN103375159B CN103375159B CN201210113663.5A CN201210113663A CN103375159B CN 103375159 B CN103375159 B CN 103375159B CN 201210113663 A CN201210113663 A CN 201210113663A CN 103375159 B CN103375159 B CN 103375159B
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Abstract
The invention provides a kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string, belong to exploitation of oil-gas field apparatus field.Described many flowing holes sliding sleeve comprise overcoat and be arranged in overcoat with the inner sliding sleeve of its coaxial line; Described inner sliding sleeve is cylinder, has at least two flowing holes thereon, the axis of all flowing holes all with the axis being parallel of inner sliding sleeve, and extend through the other end from one end of inner sliding sleeve.Described horizontal well multistage fracturing sliding bush tubing string comprises at least many flowing holes sliding sleeve described in one-level.The present invention is applicable to horizontal well multistage fracturing work, by increasing sliding sleeve hop count, adding fracturing sliding bush hop count, enhancing fracturing effect, ensure that fluid by frictional resistance during sliding sleeve accepting in zone of reasonableness simultaneously, improves pressing crack construction Technical and economical level.Utilize the present invention without the need to transforming existing well head and running string, significant to raising fracturing effect, have broad application prospects.
Description
Technical field
The invention belongs to exploitation of oil-gas field apparatus field, be specifically related to a kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string.
Background technology
Along with going deep into of oilfield prospecting developing, hypotonic, special hypotonic fine and close oil gas field is found in a large number and develops, one of horizontal well multistage pressure break production technique becoming most critical, and horizontal section length and pressure break hop count present the situation that increases substantially.Multistage sliding sleeve fracturing is the leading technique of fractured horizontal well, but how to increase sliding sleeve hop count, raising one-stop operation efficiency, is the bottleneck of fractured horizontal well technology.
At present, multistage pitching sliding sleeve is all throw a ball sealer step by step, opens one-level sliding sleeve, pressure break one-level, again throws the ball sealer of a slightly large level, opens upper level sliding sleeve, pressure break upper level, open sliding sleeve at different levels so step by step, realize horizontal well multistage pressure break.Due to the restriction by underground sliding sleeve overcurrent frictional resistance, sliding sleeve internal diameter can not be very little.The note discharge capacity of surface pump is 2.5-3m
3, calculated by frictional resistance model, when sliding sleeve internal diameter is less than 30mm, the frictional resistance of single sliding sleeve strengthens rapidly, in addition upper strata sliding sleeve frictional resistance and well friction drag, and accumulative frictional resistance is comparatively large, and practice of construction is unacceptable.Therefore, limit by overcurrent frictional resistance, sliding sleeve progression can not continue to increase.
Summary of the invention
The object of the invention is to solve the difficult problem existed in above-mentioned prior art, a kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string are provided, increase sliding sleeve hop count, increase single pressure break hop count, improve fracturing effect, improve input-output ratio.
The present invention is achieved by the following technical solutions:
A kind of many flowing holes sliding sleeve, comprise overcoat 2 and be arranged in overcoat 2 with the inner sliding sleeve of its coaxial line;
Described inner sliding sleeve is cylinder, has at least two flowing holes thereon, the axis of all flowing holes all with the axis being parallel of inner sliding sleeve, and extend through the other end from one end of inner sliding sleeve.
The number of the flowing hole on described inner sliding sleeve is 2-4; The diameter of all flowing holes on same inner sliding sleeve is identical, and all flowing holes on cross section on same inner sliding sleeve are uniformly distributed in the circumferential relative to the center of circle of inner sliding sleeve.
What have 2 flowing holes is diplopore inner sliding sleeve, and what have 3 flowing holes is three hole inner sliding sleeves, and what have 4 flowing holes is four hole inner sliding sleeves.
Each flowing hole on described inner sliding sleeve is furnished with a ball sealer; The diameter of described ball sealer is greater than the internal diameter with the flowing hole of its pairing;
One end of described inner sliding sleeve is provided with the face that is sealed and matched for accepting described ball sealer, sealing fitting face and ball sealer suitable.
The number of the flowing hole on described inner sliding sleeve is more, and the diameter of its flowing hole is less, and the diameter of corresponding ball sealer is also less.
The external surface of described inner sliding sleeve and the inner surface of described overcoat 2 are slidably matched in the axial direction, are provided with shear pin 9 in both cooperation places, and inner sliding sleeve is fixed on the inside of overcoat 2 by described shear pin 9;
The external surface of described inner sliding sleeve is provided with seal groove 8, O type circle is installed in described seal groove 8 and seals with the hole realized between inner sliding sleeve and overcoat 2;
Described overcoat 2 is provided with one group of sandblasting hole 10, and described sandblasting hole 10 is circumferentially uniform described overcoat 2, and corresponding with described inner sliding sleeve; Before described inner sliding sleeve slides, described sandblasting hole 10 is blocked by inner sliding sleeve;
One end of described overcoat 2 is full-bore, and the other end is provided with convex step, and described inner sliding sleeve slides to move down and is finally stuck in this convex step place;
The wall of described overcoat 2 is designed with screw hole 7, and described inner sliding sleeve is fixed through described screw hole 7 by described shear pin 9.
A kind of horizontal well multistage fracturing sliding bush tubing string, comprises at least many flowing holes sliding sleeve described in one-level; When more than one-level, many flowing holes sliding sleeve at different levels is arranged in series, between adjacent two-stage many flowing holes sliding sleeve, be also connected with packer 402 and oil pipe 403 in turn by box cupling;
Every grade of many flowing holes sliding sleeve, all between two adjacent reservoir, forms relatively independent fracturing section, to realize staged fracturing.
When described horizontal well multistage fracturing sliding bush tubing string only includes one-level many flowing holes sliding sleeve, the upper end of this many flowing holes sliding sleeve connects single hole multistage fracturing sliding bush tubing string by box cupling 1, and lower end connects full open type sliding sleeve tubing string by box cupling;
When described horizontal well multistage fracturing sliding bush tubing string comprises many flowing holes sliding sleeve of more than two-stage or two-stage, the upper end of many flowing holes sliding sleeve of head end connects single hole multistage fracturing sliding bush tubing string by box cupling, and the lower end of many flowing holes sliding sleeve of tail end connects full open type sliding sleeve tubing string by box cupling.
The size of the overcoat 2 of many flowing holes sliding sleeve at different levels is identical, and the outside dimension of the inner sliding sleeve of many flowing holes sliding sleeve at different levels is identical, but the quantity of flowing hole on the inner sliding sleeve of many flowing holes sliding sleeve at different levels is not identical with the internal diameter of flowing hole;
The diameter of the flowing hole on the inner sliding sleeve of every grade of many flowing holes sliding sleeve is less than the diameter of the flowing hole on the inner sliding sleeve of its upper level many flowing holes sliding sleeve, and is greater than the diameter of the flowing hole on the inner sliding sleeve of its next stage many flowing holes sliding sleeve; Accordingly, the external diameter of the ball sealer that the inner sliding sleeve of every grade of many flowing holes sliding sleeve is joined is less than the internal diameter of the flowing hole of the inner sliding sleeve of upper level many flowing holes sliding sleeve, and be greater than the internal diameter of the flowing hole of the inner sliding sleeve of many flowing holes sliding sleeve at the corresponding levels, so that ball sealer passes through from the flowing hole of upper level many flowing holes sliding sleeve, and shutoff is on the flowing hole of the corresponding levels many flowing holes sliding sleeve; Described upper level refers to head end or near head end, and described next stage refers to tail end or near tail end.
The inner sliding sleeve of every grade of many flowing holes sliding sleeve is furnished with one group of ball sealer, and the number of ball sealer is equal with the number of the flowing hole of this grade of inner sliding sleeve; The number of the flowing hole on inner sliding sleeve is more, and the diameter of its flowing hole is less, and the diameter of corresponding ball sealer is also less.Determining on sliding sleeve at the corresponding levels after flowing hole number, when sliding sleeve intensity allows, allow flowing hole diameter become large, because sliding sleeve external diameter is identical, flowing hole number is more, and flowing hole internal diameter is less as far as possible.
Described horizontal well multistage fracturing sliding bush tubing string can be comprise one-level many flowing holes sliding sleeve, has diplopore inner sliding sleeve in this many flowing holes sliding sleeve.
Described horizontal well multistage fracturing sliding bush tubing string also can be comprise two-stage many flowing holes sliding sleeve, and wherein one-level flowing hole sliding sleeve is with diplopore inner sliding sleeve, and another grade of flowing hole sliding sleeve is with four hole inner sliding sleeves or with three hole inner sliding sleeves.
Described horizontal well multistage fracturing sliding bush tubing string can also be comprise flowing hole sliding sleeve more than three grades, and wherein first order flowing hole sliding sleeve is with diplopore inner sliding sleeve, and middle one-level flowing hole sliding sleeve is with three hole inner sliding sleeves, and afterbody flowing hole sliding sleeve is with four hole inner sliding sleeves.In porous sliding sleeve section with regard to three grades, these three grades is exactly than additional three grades of current existing fracturing sliding bush tubing string, connects for existing single flowing hole sliding sleeve tubing string in actual use, connect these three grades below, form new fracturing string above tubing string.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention is designed with 2-4 flowing hole on inner sliding sleeve, ensure that fluid by frictional resistance during sliding sleeve in acceptable zone of reasonableness; Need the ball number that administration hole count is identical when carrying out fracturing work, ball sealer number is identical with hole count at every turn, to block flowing holes all on inner sliding sleeve at the corresponding levels;
(2) the invention solves fracturing sliding bush because being subject to the problem that hole diameter size and circulation frictional resistance limit and sliding sleeve hop count is limited, overcome the bottleneck that sliding sleeve internal diameter can not be less than 30mm usually, because each hole is less than 30mm, but because hole count becomes many, the area of passage of porous is just comparatively large, and Value of Friction Loss just can accept;
(3) the present invention is improved by structure and adds fracturing sliding bush hop count, thus adds fractured horizontal well hop count, decreases disposable input, improves fracturing reform effect and input-output ratio, improve pressing crack construction Technical and economical level;
(4) structure of the present invention is simple, is easy to execute-in-place, without the need to transforming existing well head and running string, significant to raising fracturing effect, has broad application prospects.
Accompanying drawing explanation
Fig. 1-1 is the structural representation of the embodiment that the series connection of the present invention's many flowing holes sliding sleeve uses, and is now the state after setting.
Fig. 1-2 is the structural representation of the embodiment that the series connection of the present invention's many flowing holes sliding sleeve uses, and is now the state before setting.
Wherein, 1 is box cupling, and 2 is overcoat, and 3 is large ball sealer, and 4 is diplopore inner sliding sleeve, and 5 is little ball sealer, and 6 is four hole inner sliding sleeves, and 7 is screw hole, and 8 is seal groove, and 9 is shear pin.
Fig. 2-1 is the schematic perspective view of the diplopore inner sliding sleeve 4 in the present invention's many flowing holes sliding sleeve, is now the state after setting.
Fig. 2-2 is schematic perspective views of four hole inner sliding sleeves 6 in the present invention's many flowing holes sliding sleeve, is now the state after setting.
Fig. 3-1 be in the present invention's many flowing holes sliding sleeve ball sealer set before the schematic perspective view of diplopore inner sliding sleeve 4.
Fig. 3-2 be in the present invention's many flowing holes sliding sleeve ball sealer set before the schematic perspective view of four hole inner sliding sleeves 6.
The structural representation of Fig. 4 horizontal well multistage of the present invention fracturing sliding bush tubing string.Wherein, 401 is many flowing holes sliding sleeve, and 402 is packer, and 403 is oil pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
What Fig. 1 provided is the embodiment that the series connection of the present invention's many flowing holes sliding sleeve uses, it use two-stage sliding sleeve, i.e. two overcoats 2 and corresponding flowing hole sliding sleeve more than two, flowing hole sliding sleeve more than two is equipped with diplopore inner sliding sleeve 4 (as shown in figure 3-1) and four hole inner sliding sleeves 6 (as shown in figure 3-2) respectively, what match with described diplopore inner sliding sleeve 4 is large ball sealer 3, and what match with described four hole inner sliding sleeves 6 is little ball sealer 5, the diameter of described little ball sealer 5 is less than the diameter of large ball sealer 3, Fig. 1 is an embodiment, during actual use, to can will have diplopore inner sliding sleeve as required, three hole inner sliding sleeves, the sliding sleeve of four hole inner sliding sleeves with the use of, also can be used alone (such as, if certain mouthful of well design pressure break needs 10 sections, but single flowing hole fracturing sliding bush ripe at present, owing to reducing the reason that frictional resistance increases by sliding sleeve endoporus, be 9 sections to the maximum, at this moment one can just singly be added with diplopore inner sliding sleeve or with three hole inner sliding sleeves or the sliding sleeve with four hole inner sliding sleeves) or use with diplopore inner sliding sleeve with the sliding bush combination of three hole inner sliding sleeves, the sliding sleeve that ordinary priority selects hole count few, select sliding sleeve that hole count is many (such as again when the sliding sleeve that hole count is few is inadequate, above for the example of 10 sections in, current single hole only have 9 sections, preferred diplopore inner sliding sleeve, instead of three hole inner sliding sleeve or four hole inner sliding sleeves, if need 11 sections, just need increase by 2 sections, generally preferred diplopore inner sliding sleeve+three hole inner sliding sleeve, and do not select three hole inner sliding sleeve+four hole inner sliding sleeves).According to actual service condition and hole diameter dimension modifying, for large scale well (namely the diameter of well is large), one-level three hole inner sliding sleeve can be added between diplopore inner sliding sleeve embodiment illustrated in fig. 1 and four hole inner sliding sleeves, also will increase the oil pipe of a packer and one section of design length simultaneously.
The size of overcoat 2 at different levels is identical, according to the requirement determination pressure break hop count of FRACTURING DESIGN, the difference of each section of sliding sleeve is distinguished by inner sliding sleeve, the outside dimension of inner sliding sleeve at different levels is identical, the overcurrent hole count of inner sliding sleeve at different levels and the internal diameter in hole are different, Fig. 3-1 is diplopore inner sliding sleeve 4, Fig. 3-2 is four hole inner sliding sleeves 6, diplopore inner sliding sleeve 4 there are two flowing holes, four hole inner sliding sleeves 6 have 4 flowing holes, the diameter of the flowing hole of diplopore inner sliding sleeve 4 is greater than the diameter of the flowing hole of four hole inner sliding sleeves 6.On an inner sliding sleeve, when flowing hole and flowing hole compartment intensity enough, flowing hole will be tried one's best greatly, and flowing hole diameter on same inner sliding sleeve is identical.
Before pressure break, the ball sealer of all inner sliding sleeves is all placed in well head ball injector; Be connected by shear pin 9 between inner sliding sleeve with overcoat 2, shear pin 9 is arranged in the screw hole 7 on overcoat 2, and now inner sliding sleeve blocks the sandblasting hole 10 on overcoat 2; Inner sliding sleeve external surface is designed with 4 seal grooves 8 (as shown in Figures 2 and 3, each two seal grooves up and down), O type circle is installed in seal groove 8 and seals with the hole realized between inner sliding sleeve and overcoat 2.Before each section of fracturing work, (now the state of inner sliding sleeve as shown in Figure 3, there is no ball sealer above), start the pitching of well head ball injector, then turn on pump pumping ball sealer, when ball sealer all sets the sealed end at inner sliding sleeve, (now the state of inner sliding sleeve as shown in Figure 2, sealed end has set ball sealer.), fluid cannot flow out, and pressure starts to raise, until cut off shear pin 9, inner sliding sleeve slides into the position shown in Fig. 1-1 by the position shown in Fig. 1-2, and now sandblasting hole 10 is opened, and then starts fracturing work.
The structure of Fig. 1 just in order to this many flowing holes sliding sleeve is described, when reality uses, possibility interval 70-80m between pressure break two ends, also packing is carried out with packer between every two sections, in using because actual, sliding sleeve length is also with regard to about 1 meter, and the spacing of two packers can be several meters, tens meters or longer, therefore needs between sliding sleeve with packer to be connected with oil pipe.Specifically, (Fig. 4 comprises flowing hole sliding sleeve more than three grades as shown in Figure 4 to use the horizontal well multistage fracturing sliding bush tubing string of described many flowing holes sliding sleeve, also more than three grades or three grades can be less than), packer 402 is added by box cupling 1 in the centre of two-stage many flowing holes sliding sleeve 401 of Fig. 1, and the oil pipe 403 of length is needed according to distance join between two sections, if more than two-stage, then all to add packer and oil pipe 403 by box cupling between adjacent two-stage, each overcoat 2 is between two adjacent reservoir, form relatively independent fracturing section, to realize staged fracturing.If only need flowing hole sliding sleeve more than, then this sliding sleeve upper end connects the single hole multistage fracturing sliding bush tubing string of development comparative maturity at present by box cupling, lower end connects not containing the full open type sliding sleeve tubing string of inner sliding sleeve by box cupling, comprehensive composition fracturing sliding bush tubing string, if two or more many flowing holes sliding sleeve, then the sliding sleeve upper end of head end connects single hole multistage fracturing sliding bush tubing string by box cupling, and the lower end of the sliding sleeve of tail end connects full open type sliding sleeve tubing string by box cupling, comprehensive composition fracturing sliding bush tubing string.
The present invention is applicable to horizontal well multistage fracturing work, that it changes traditional design thinking and scheme, in the larger situation of single flowing hole inner sliding sleeve overcurrent frictional resistance, inner sliding sleeve designs 2-4 flowing hole, reduces frictional resistance during fracturing fluid overcurrent.Add sliding sleeve progression by improvement of the present invention, thus add fractured horizontal well hop count, improve fracturing reform effect, improve fractured horizontal well transformation Technical and economical level.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses application process and principle, be easy to make various types of improvement or distortion, and the method be not limited only to described by the above-mentioned detailed description of the invention of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (8)
1. the sliding sleeve of flowing hole more than, is characterized in that: described many flowing holes sliding sleeve comprise overcoat (2) and be arranged in overcoat (2) with the inner sliding sleeve of its coaxial line;
Described inner sliding sleeve is cylinder, has at least two flowing holes thereon, the axis of all flowing holes all with the axis being parallel of inner sliding sleeve, and extend through the other end from one end of inner sliding sleeve, and
The external surface of described inner sliding sleeve and the inner surface of described overcoat (2) are slidably matched in the axial direction, be provided with shear pin (9) in both cooperation places, inner sliding sleeve is fixed on the inside of overcoat (2) by described shear pin (9);
The external surface of described inner sliding sleeve is provided with seal groove (8), O type circle is installed in described seal groove (8);
Described overcoat (2) is provided with one group of sandblasting hole (10), circumferentially uniform at described overcoat (2) of described sandblasting hole (10), and corresponding with described inner sliding sleeve; Before described inner sliding sleeve slides, described sandblasting hole (10) is blocked by inner sliding sleeve;
One end of described overcoat (2) is full-bore, and the other end is provided with convex step, and described inner sliding sleeve slides to move down and is finally stuck in this convex step place;
The wall of described overcoat (2) is designed with screw hole (7), and described inner sliding sleeve is fixed through described screw hole (7) by described shear pin (9).
2. many flowing holes sliding sleeve according to claim 1, is characterized in that: the number of the flowing hole on described inner sliding sleeve is 2-4; The diameter of all flowing holes on same inner sliding sleeve is identical, and all flowing holes on cross section on same inner sliding sleeve are uniformly distributed in the circumferential relative to the center of circle of inner sliding sleeve.
3. many flowing holes sliding sleeve according to claim 2, is characterized in that: what have 2 flowing holes is diplopore inner sliding sleeve, and what have 3 flowing holes is three hole inner sliding sleeves, and what have 4 flowing holes is four hole inner sliding sleeves.
4. the many flowing holes sliding sleeve according to Claims 2 or 3, is characterized in that: each flowing hole on described inner sliding sleeve is furnished with a ball sealer; The diameter of described ball sealer is greater than the internal diameter with the flowing hole of its pairing;
One end of described inner sliding sleeve is provided with the face that is sealed and matched for accepting described ball sealer, sealing fitting face and ball sealer suitable.
5. many flowing holes sliding sleeve according to claim 4, it is characterized in that: the number of the flowing hole on described inner sliding sleeve is more, the diameter of its flowing hole is less, and the diameter of corresponding ball sealer is also less.
6. a horizontal well multistage fracturing sliding bush tubing string for many flowing holes sliding sleeve described in claim 1 is housed, it is characterized in that: described horizontal well multistage fracturing sliding bush tubing string comprises at least many flowing holes sliding sleeve described in one-level; When more than one-level, many flowing holes sliding sleeve at different levels is arranged in series, between adjacent two-stage many flowing holes sliding sleeve, be also connected with packer (402) and oil pipe (403) in turn by box cupling;
Every grade of described many flowing holes sliding sleeve is all between two adjacent reservoir.
7. horizontal well multistage fracturing sliding bush tubing string according to claim 6, it is characterized in that: when described horizontal well multistage fracturing sliding bush tubing string only includes one-level many flowing holes sliding sleeve, the upper end of this many flowing holes sliding sleeve connects single hole multistage fracturing sliding bush tubing string by box cupling, and lower end connects full open type sliding sleeve tubing string by box cupling;
When described horizontal well multistage fracturing sliding bush tubing string comprises many flowing holes sliding sleeve of more than two-stage or two-stage, the upper end of many flowing holes sliding sleeve of head end connects single hole multistage fracturing sliding bush tubing string by box cupling, and the lower end of many flowing holes sliding sleeve of tail end connects full open type sliding sleeve tubing string by box cupling.
8. horizontal well multistage fracturing sliding bush tubing string according to claim 7, it is characterized in that: the size of the overcoat (2) of many flowing holes sliding sleeve at different levels is identical, the outside dimension of the inner sliding sleeve of many flowing holes sliding sleeve at different levels is identical, but the quantity of flowing hole on the inner sliding sleeve of many flowing holes sliding sleeve at different levels is not identical with the internal diameter of flowing hole;
The diameter of the flowing hole on the inner sliding sleeve of every grade of many flowing holes sliding sleeve is less than the diameter of the flowing hole on the inner sliding sleeve of its upper level many flowing holes sliding sleeve, and is greater than the diameter of the flowing hole on the inner sliding sleeve of its next stage many flowing holes sliding sleeve; Accordingly, the external diameter of the ball sealer that the inner sliding sleeve of every grade of many flowing holes sliding sleeve is joined is less than the internal diameter of the flowing hole of the inner sliding sleeve of upper level many flowing holes sliding sleeve, and is greater than the internal diameter of the flowing hole of the inner sliding sleeve of many flowing holes sliding sleeve at the corresponding levels.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210113663.5A CN103375159B (en) | 2012-04-17 | 2012-04-17 | A kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210113663.5A CN103375159B (en) | 2012-04-17 | 2012-04-17 | A kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string |
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| CN103375159A CN103375159A (en) | 2013-10-30 |
| CN103375159B true CN103375159B (en) | 2016-01-13 |
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| CN201210113663.5A Active CN103375159B (en) | 2012-04-17 | 2012-04-17 | A kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11933138B2 (en) | 2020-06-12 | 2024-03-19 | China Petroleum & Chemical Corporation | Sliding sleeve device |
| CN113803021A (en) * | 2020-06-12 | 2021-12-17 | 中国石油化工股份有限公司 | Fracturing nipple and fracturing string comprising same |
| CN113757101B (en) * | 2021-11-08 | 2022-01-11 | 西南石油大学 | Integral type components of a whole that can function independently plunger of adjustable falling speed |
| CN113914832B (en) * | 2021-12-15 | 2022-03-01 | 东营市福利德石油科技开发有限责任公司 | Horizontal well full-drift-diameter infinite-stage fracturing tool |
Citations (4)
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| CN201851071U (en) * | 2010-11-20 | 2011-06-01 | 中国石油集团西部钻探工程有限公司 | Multistage fracturing hole-sealing tool |
| CN201902202U (en) * | 2010-11-25 | 2011-07-20 | 中国石油化工股份有限公司 | Staged fracturing string of oil-gas horizontal well |
| CN202125289U (en) * | 2011-06-22 | 2012-01-25 | 中国石油化工股份有限公司 | Sliding sleeve assembly of selective switch |
| CN102337862A (en) * | 2011-10-17 | 2012-02-01 | 中国石油天然气股份有限公司 | Variable-diameter fracturing valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8403068B2 (en) * | 2010-04-02 | 2013-03-26 | Weatherford/Lamb, Inc. | Indexing sleeve for single-trip, multi-stage fracing |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201851071U (en) * | 2010-11-20 | 2011-06-01 | 中国石油集团西部钻探工程有限公司 | Multistage fracturing hole-sealing tool |
| CN201902202U (en) * | 2010-11-25 | 2011-07-20 | 中国石油化工股份有限公司 | Staged fracturing string of oil-gas horizontal well |
| CN202125289U (en) * | 2011-06-22 | 2012-01-25 | 中国石油化工股份有限公司 | Sliding sleeve assembly of selective switch |
| CN102337862A (en) * | 2011-10-17 | 2012-02-01 | 中国石油天然气股份有限公司 | Variable-diameter fracturing valve |
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