CN103375159A - Multi-flowing-hole slide bushing and multistage horizontal well fracturing slide bushing string - Google Patents
Multi-flowing-hole slide bushing and multistage horizontal well fracturing slide bushing string Download PDFInfo
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- CN103375159A CN103375159A CN2012101136635A CN201210113663A CN103375159A CN 103375159 A CN103375159 A CN 103375159A CN 2012101136635 A CN2012101136635 A CN 2012101136635A CN 201210113663 A CN201210113663 A CN 201210113663A CN 103375159 A CN103375159 A CN 103375159A
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Abstract
The invention provides a multi-flowing-hole slide bushing and a multistage horizontal well fracturing slide bushing string, and belongs to the field of oil-gas field exploitation equipment. The multi-flowing-hole slide bushing comprises an outer bushing and an inner slide bushing mounted in the outer bushing and coaxial with the same, the inner slide bushing is a cylinder, at least two flowing holes are formed in the inner slide bushing, axes of the flowing holes are parallel to that of the inner slide bushing, and each flowing hole penetrates from one end of the inner slide bushing to the other end thereof. The multistage horizontal well fracturing slide bushing string comprises at least one stage of the multi-flowing-hole slide bushing. The multi-flowing-hole slide bushing and the multistage horizontal well fracturing slide bushing string are applicable to multistage horizontal well fracturing operation, number of segments of a fracturing slide bushing is increased by increasing number of segments of the slide bushing, a fracturing effect is enhanced, friction is kept within an acceptable reasonable range when fluid passes through the slide bushing, and economic level of a fracturing construction technique is increased. By the aid of the multi-flowing-hole slide bushing and the multistage horizontal well fracturing slide bushing string, existing wellhead and running strings need not to be modified, and the multi-flowing-hole slide bushing and the multistage horizontal well fracturing slide bushing string have significances to fracturing effect improvement and have broad application prospects.
Description
Technical field
The invention belongs to the 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, and horizontal well multistage pressure break becomes one of production technique of most critical, and horizontal section length and pressure break hop count present the situation that increases substantially.The multistage sliding sleeve fracturing is the leading technique of fractured horizontal well, but how to increase sliding sleeve hop count, raising one-stop operation efficient, is the bottleneck of fractured horizontal well technology.
At present, multistage pitching sliding sleeve all is to throw step by step a ball sealer, opens the one-level sliding sleeve, and the pressure break one-level is thrown a slightly ball sealer of large level again, opens the upper level sliding sleeve, and the pressure break upper level is opened sliding sleeves at different levels so step by step, realizes horizontal well multistage pressure break.Because be subjected to the restriction of underground sliding sleeve overcurrent frictional resistance, sliding sleeve internal diameter can not be very little.The notes discharge capacity of surface pump is 2.5-3m
3, calculate by the frictional resistance model, when sliding sleeve internal diameter during less than 30mm, the frictional resistance of single sliding sleeve strengthens rapidly, in addition upper strata sliding sleeve frictional resistance and well friction drag, totally frictional resistance is larger, and practice of construction is unacceptable.Therefore, limited by the overcurrent frictional resistance, sliding sleeve progression can not continue to increase.
Summary of the invention
The object of the invention is to solve a difficult problem that exists in the above-mentioned prior art, a kind of many flowing holes sliding sleeve and horizontal well multistage fracturing sliding bush tubing string are provided, increase the 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 comprises overcoat 2 and is installed in the overcoat 2 and inner sliding sleeve its coaxial line;
Described inner sliding sleeve is cylinder, has at least two flowing holes thereon, and the axis of all flowing holes is all parallel with the axis of inner sliding sleeve, and extends through the other end from an end of inner sliding sleeve.
The number of the flowing hole on the 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 same inner sliding sleeve on the cross section upwards evenly distribute in week with respect to the center of circle of inner sliding sleeve.
What have 2 flowing holes is the 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 the described inner sliding sleeve is furnished with a ball sealer; The diameter of described ball sealer greater than with the internal diameter of the flowing hole of its pairing;
One end of described inner sliding sleeve is provided be used to the face that is sealed and matched of accepting described ball sealer, and sealing fitting face and ball sealer are suitable.
The number of the flowing hole on the described inner sliding sleeve is more, and the diameter of its flowing hole is just less, and the diameter of corresponding ball sealer is also less.
The inner surface of the external surface of described inner sliding sleeve and described overcoat 2 is slidingly matched in the axial direction, is provided with shear pin 9 in both cooperation places, and described shear pin 9 is fixed on inner sliding sleeve the inside of overcoat 2;
External surface at described inner sliding sleeve is provided with seal groove 8, O type circle is installed to realize the hole sealing between inner sliding sleeve and the overcoat 2 in described seal groove 8;
Described overcoat 2 is provided with one group of sandblast hole 10, and described sandblast hole 10 is uniform on the circumference of described overcoat 2, and corresponding with described inner sliding sleeve; Before described inner sliding sleeve slided, described sandblast hole 10 was blocked by inner sliding sleeve;
One end of described overcoat 2 is full-bore, and the other end is provided with the convex step, and described inner sliding sleeve slides to move down and is stuck at last this convex step place;
Wall at described overcoat 2 is designed with screw hole 7, and described shear pin 9 passes described screw hole 7 described inner sliding sleeve is fixed.
A kind of horizontal well multistage fracturing sliding bush tubing string comprises at least described many flowing holes sliding sleeve of one-level; When more than one-level, many flowing holes sliding sleeve series connection at different levels arrange, and also are connected with packer 402 and oil pipe 403 in turn by box cupling between adjacent many flowing holes of two-stage sliding sleeve;
Every grade of many flowing holes sliding sleeve all between two adjacent oil-gas Layer, forms relatively independent fracturing section, to realize staged fracturing.
When described horizontal well multistage fracturing sliding bush tubing string included only many flowing holes of one-level sliding sleeve, the upper end of this many flowing holes sliding sleeve connected single hole multistage fracturing sliding bush tubing string by box cupling 1, and the lower end connects full open type sliding sleeve tubing string by box cupling;
When described horizontal well multistage fracturing sliding bush tubing string comprises two-stage or the sliding sleeve of the many flowing holes more than the 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 sleeves at different levels is identical, and the outside dimension of the inner sliding sleeve of many flowing holes sliding sleeves at different levels is identical, but the quantity of the flowing hole on the inner sliding sleeve of many flowing holes sliding sleeves 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 many flowing holes of upper level sliding sleeve, and greater than the diameter of the flowing hole on the inner sliding sleeve of its many flowing holes of next stage 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 many flowing holes of upper level sliding sleeve, and greater than the internal diameter of the flowing hole of the inner sliding sleeve of many flowing holes of corresponding levels sliding sleeve, so that ball sealer passes through from the flowing hole of many flowing holes of upper level sliding sleeve, and shutoff is on the flowing hole of many flowing holes of corresponding levels 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 equates with the number of the flowing hole of this grade inner sliding sleeve; The number of the flowing hole on the inner sliding sleeve is more, and the diameter of its flowing hole is just less, and the diameter of corresponding ball sealer is also less.Determining on the sliding sleeve at the corresponding levels behind the flowing hole number that in the situation that sliding sleeve intensity allows, allow the flowing hole diameter become large, because the sliding sleeve external diameter is identical, the flowing hole number is more as far as possible, the flowing hole internal diameter is just less.
Described horizontal well multistage fracturing sliding bush tubing string can be to comprise many flowing holes of one-level sliding sleeve, in this many flowing holes sliding sleeve the diplopore inner sliding sleeve is arranged.
Described horizontal well multistage fracturing sliding bush tubing string also can be to comprise many flowing holes of two-stage sliding sleeve, and wherein one-level flowing hole sliding sleeve is with the diplopore inner sliding sleeve, and another grade 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 to comprise flowing hole sliding sleeve more than three grades, and wherein first order flowing hole sliding sleeve is with the 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.With regard to three grades, these three grades is exactly than additional three grades of present existing fracturing sliding bush tubing string, is connected in actual use existing single flowing hole sliding sleeve tubing string above the tubing string in porous sliding sleeve section, and the below connects these three grades, forms new fracturing string.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention is designed with 2-4 flowing hole at inner sliding sleeve, and the frictional resistance when having guaranteed fluid by sliding sleeve is in acceptable zone of reasonableness; Need to throw the nodule number identical with hole count when carrying out fracturing work, the ball sealer number is identical with hole count, in order to block flowing holes all on the inner sliding sleeve at the corresponding levels at every turn;
(2) the invention solves fracturing sliding bush because being subjected to hole diameter size and the limited problem of circulation frictional resistance restriction sliding sleeve hop count, having overcome sliding sleeve internal diameter usually can not be less than the bottleneck of 30mm, because each hole is less than 30mm, but because the hole count change is many, the area of passage of porous is just larger, and Value of Friction Loss just can be accepted;
(3) the present invention has increased the fracturing sliding bush hop count by architecture advances, thereby has increased the fractured horizontal well hop count, has reduced disposable input, has improved fracturing reform effect and input-output ratio, has improved pressing crack construction Technological Economy level;
(4) the present invention is simple in structure, is easy to execute-in-place, need not to transform existing well head and running string, and is significant to improving fracturing effect, has broad application prospects.
Description of drawings
Fig. 1-the 1st, the structural representation of the embodiment that the series connection of many flowing holes of the present invention sliding sleeve is used is the state after setting at this moment.
Fig. 1-2 is the structural representation of an embodiment of many flowing holes of the present invention sliding sleeve series connection use, is the state before setting at this moment.
Wherein, 1 is box cupling, and 2 is overcoat, and 3 is large ball sealer, and 4 is the 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-the 1st, the schematic perspective view of the diplopore inner sliding sleeve 4 in many flowing holes of the present invention sliding sleeve is the state after setting at this moment.
Fig. 2-the 2nd, the schematic perspective view of four hole inner sliding sleeves 6 in many flowing holes of the present invention sliding sleeve is the state after setting at this moment.
Fig. 3-the 1st, the schematic perspective view of the diplopore inner sliding sleeve 4 before ball sealer sets in many flowing holes of the present invention sliding sleeve.
Fig. 3-the 2nd, the schematic perspective view of four hole inner sliding sleeves 6 before ball sealer sets in many flowing holes of the present invention sliding sleeve.
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.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
That Fig. 1 provides is the embodiment that the series connection of many flowing holes of the present invention sliding sleeve is used, it has used the 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 respectively diplopore inner sliding sleeve 4 (shown in Fig. 3-1) and four hole inner sliding sleeves 6 (shown in Fig. 3-2); 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 the use, to can the diplopore inner sliding sleeve will be had as required, three hole inner sliding sleeves, the sliding sleeve of four hole inner sliding sleeves is used, also (for example can use separately, if certain mouthful of well design pressure break needs 10 sections, but present ripe single flowing hole fracturing sliding bush, owing to being subjected to the sliding sleeve endoporus to reduce the reason that frictional resistance increases, be 9 sections to the maximum, at this moment just can singly add one with the diplopore inner sliding sleeve or with three hole inner sliding sleeves or with the sliding sleeve of four hole inner sliding sleeves) or will use with the diplopore inner sliding sleeve with the sliding bush combination of three hole inner sliding sleeves, ordinary priority is selected the few sliding sleeve of hole count, (for example in the inadequate situation of the few sliding sleeve of hole count, select again the many sliding sleeves of hole count, previously for 10 sections example in, single hole only has 9 sections at present, preferred diplopore inner sliding sleeve, rather than three hole inner sliding sleeves or four hole inner sliding sleeves; If need 11 sections, just needing increases by 2 sections, a general preferred diplopore inner sliding sleeve+three hole inner sliding sleeves, and do not select three hole inner sliding sleeves+four hole inner sliding sleeves).According to actual mode of occupation and hole diameter dimension modifying, for large scale well (diameter that is well is large), between diplopore inner sliding sleeve embodiment illustrated in fig. 1 and four hole inner sliding sleeves, can add one-level three hole inner sliding sleeves, also will increase simultaneously the oil pipe of a packer and one section design length.
The size of overcoat 2 at different levels is identical, determine the pressure break hop count according to the requirement of FRACTURING DESIGN, the difference of each section 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 sleeves 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, two flowing holes are arranged on the diplopore inner sliding sleeve 4,4 flowing holes are arranged on the four hole inner sliding sleeves 6, and 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, in the enough situation of flowing hole and flowing hole compartment intensity, flowing hole will be tried one's best greatly, and the flowing hole diameter on the same inner sliding sleeve is identical.
Before pressure break, the ball sealer of all inner sliding sleeves all is placed in the well head ball injector; Be connected by shear pin 9 between inner sliding sleeve and the overcoat 2, shear pin 9 is installed in the screw hole 7 on the overcoat 2, and this moment, inner sliding sleeve was blocked the sandblast hole 10 on the overcoat 2; Be designed with 4 seal grooves 8 (as shown in Figures 2 and 3, up and down each two seal groove) on the inner sliding sleeve external surface, O type circle be installed in the seal groove 8 seal to realize inner sliding sleeve and hole between the overcoat 2.(state of inner sliding sleeve as shown in Figure 3 at this moment before each section fracturing work, the above does not have ball sealer), start the pitching of well head ball injector, then turn on pump pumping ball sealer, when ball sealer all sets sealed end at inner sliding sleeve (this moment inner sliding sleeve state as shown in Figure 2, set ball sealer on the sealed end.), fluid can't flow out, and pressure begins to raise, and 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 this moment, sand jet outlet 10 was opened, and then began fracturing work.
Fig. 1 is just in order to illustrate the structure of this many flowing holes sliding sleeve, when reality is used, possibility interval 70-80m between the pressure break two ends, also to carry out packing with packer between per two sections, because sliding sleeve length is also with regard to about 1 meter in actual the use, and distance can be several meters, tens meters or longer between two packers, so needs to link to each other with oil pipe between sliding sleeve and the packer.Specifically, use the horizontal well multistage fracturing sliding bush tubing string of described many flowing holes sliding sleeve (to comprise flowing hole sliding sleeve more than three grades among Fig. 4, also can or be less than three grades more than three grades as shown in Figure 4.), packer 402 is added by box cupling 1 in centre at many flowing holes of two-stage sliding sleeve 401 of Fig. 1, and according to the oil pipe 403 of distance join needs length between two sections, if more than two-stage, then all to add packer and oil pipe 403 by box cupling between the adjacent two-stage, each overcoat 2 forms relatively independent fracturing section between two adjacent oil-gas Layer, to realize staged fracturing.If only need flowing hole sliding sleeve more than, then this sliding sleeve upper end connects the at present single hole multistage fracturing sliding bush tubing string of development comparative maturity by box cupling, the lower end connects the full open type sliding sleeve tubing string that does not contain inner sliding sleeve by box cupling, the comprehensive fracturing sliding bush tubing string that forms, if two or more many flowing holes sliding sleeves, then the sliding sleeve of head end upper 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, comprehensively forms the fracturing sliding bush tubing string.
The present invention is applicable to horizontal well multistage fracturing work, and it has changed traditional design thinking and scheme, in the larger situation of single flowing hole inner sliding sleeve overcurrent frictional resistance, at 2-4 flowing hole of inner sliding sleeve design, the frictional resistance when reducing the fracturing fluid overcurrent.Increased sliding sleeve progression by improvement of the present invention, thereby increased the fractured horizontal well hop count, improved the fracturing reform effect, improved the Technological Economy level that fractured horizontal well is transformed.
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 be not limited only to the described method of the above-mentioned specific embodiment of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (9)
1. flowing hole sliding sleeve more than a kind is characterized in that: described many flowing holes sliding sleeve comprises overcoat (2) and is installed in the overcoat (2) and inner sliding sleeve its coaxial line;
Described inner sliding sleeve is cylinder, has at least two flowing holes thereon, and the axis of all flowing holes is all parallel with the axis of inner sliding sleeve, and extends through the other end from an end of inner sliding sleeve.
2. many flowing holes sliding sleeve according to claim 1 is characterized in that: the number of the flowing hole on the 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 same inner sliding sleeve on the cross section upwards evenly distribute in week with respect 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 the 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. according to claim 2 or 3 described many flowing holes sliding sleeves, it is characterized in that: each flowing hole on the described inner sliding sleeve is furnished with a ball sealer; The diameter of described ball sealer greater than with the internal diameter of the flowing hole of its pairing;
One end of described inner sliding sleeve is provided be used to the face that is sealed and matched of accepting described ball sealer, and sealing fitting face and ball sealer are suitable.
5. many flowing holes sliding sleeve according to claim 4 is characterized in that: the number of the flowing hole on the described inner sliding sleeve is more, and the diameter of its flowing hole is just less, and the diameter of corresponding ball sealer is also less.
6. many flowing holes sliding sleeve according to claim 5, it is characterized in that: the inner surface of the external surface of described inner sliding sleeve and described overcoat (2) is slidingly matched in the axial direction, be provided with shear pin (9) in both cooperation places, described shear pin (9) is fixed on inner sliding sleeve the inside of overcoat (2);
External surface at described inner sliding sleeve is provided with seal groove (8), and O type circle is installed in described seal groove (8);
Described overcoat (2) is provided with one group of sandblast hole (10), and described sandblast hole (10) is uniform on the circumference of described overcoat (2), and corresponding with described inner sliding sleeve; Before described inner sliding sleeve slided, described sandblast hole (10) was blocked by inner sliding sleeve;
One end of described overcoat (2) is full-bore, and the other end is provided with the convex step, and described inner sliding sleeve slides to move down and is stuck at last this convex step place;
Wall at described overcoat (2) is designed with screw hole (7), and described shear pin (9) passes described screw hole (7) described inner sliding sleeve is fixed.
7. horizontal well multistage fracturing sliding bush tubing string that the described many flowing holes sliding sleeve of claim 6 is housed, it is characterized in that: described horizontal well multistage fracturing sliding bush tubing string comprises at least described many flowing holes sliding sleeve of one-level; When more than one-level, many flowing holes sliding sleeve series connection at different levels arrange, and also are connected with packer (402) and oil pipe (403) in turn by box cupling between adjacent many flowing holes of two-stage sliding sleeve;
Every grade of described many flowing holes sliding sleeve is all between two adjacent oil-gas Layer.
8. horizontal well multistage fracturing sliding bush tubing string according to claim 7, it is characterized in that: when described horizontal well multistage fracturing sliding bush tubing string includes only many flowing holes of one-level 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 the lower end connects full open type sliding sleeve tubing string by box cupling;
When described horizontal well multistage fracturing sliding bush tubing string comprises two-stage or the sliding sleeve of the many flowing holes more than the 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.
9. horizontal well multistage fracturing sliding bush tubing string according to claim 8, it is characterized in that: the size of the overcoat of many flowing holes sliding sleeves at different levels (2) is identical, the outside dimension of the inner sliding sleeve of many flowing holes sliding sleeves at different levels is identical, but the quantity of the flowing hole on the inner sliding sleeve of many flowing holes sliding sleeves 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 many flowing holes of upper level sliding sleeve, and greater than the diameter of the flowing hole on the inner sliding sleeve of its many flowing holes of next stage 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 many flowing holes of upper level sliding sleeve, and greater than the internal diameter of the flowing hole of the inner sliding sleeve of many flowing holes of corresponding levels sliding sleeve.
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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 true CN103375159A (en) | 2013-10-30 |
| CN103375159B 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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| CN113757101A (en) * | 2021-11-08 | 2021-12-07 | 西南石油大学 | Integral type components of a whole that can function independently plunger of adjustable falling speed |
| 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 |
| CN113914832A (en) * | 2021-12-15 | 2022-01-11 | 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 |
| US11933138B2 (en) | 2020-06-12 | 2024-03-19 | China Petroleum & Chemical Corporation | Sliding sleeve device |
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| 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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| US20110240301A1 (en) * | 2010-04-02 | 2011-10-06 | Robison Clark E | Indexing Sleeve for Single-Trip, Multi-Stage Fracing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11933138B2 (en) | 2020-06-12 | 2024-03-19 | China Petroleum & Chemical Corporation | Sliding sleeve device |
| CN113757101A (en) * | 2021-11-08 | 2021-12-07 | 西南石油大学 | Integral type components of a whole that can function independently plunger of adjustable falling speed |
| 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 |
| CN113914832A (en) * | 2021-12-15 | 2022-01-11 | 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 |
| 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 |
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|---|---|
| CN103375159B (en) | 2016-01-13 |
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