CN202250014U - Dual-packing single-clamping staged fracturing tool - Google Patents
Dual-packing single-clamping staged fracturing tool Download PDFInfo
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- CN202250014U CN202250014U CN2011203787773U CN201120378777U CN202250014U CN 202250014 U CN202250014 U CN 202250014U CN 2011203787773 U CN2011203787773 U CN 2011203787773U CN 201120378777 U CN201120378777 U CN 201120378777U CN 202250014 U CN202250014 U CN 202250014U
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- pressure guide
- fracturing
- centralizer
- sand blaster
- packer
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Abstract
The utility model discloses a dual-packing single-clamping staged fracturing tool. A hydraulic anchor is arranged at the lower end of an upper centralizer. An upper packer is arranged at the lower end of the hydraulic anchor. A lower centralizer is arranged at the lower end of the upper packer. A pressure guide sand blaster is arranged at the lower end of the lower centralizer. A lower packer is arranged at the lower end of the pressure guide sand blaster. A screwed plug is arranged at the lower end of the lower packer. The pressure guide sand blaster has the following structure: a downwards-convergent pipeline is arranged on an upper part in the pressure guide sand blaster; a cylindrical pipeline is arranged on a middle part in the pressure guide sand blaster; a downwards-convergent pipeline is arranged at a lower end in the pressure guide sand blaster; the upper end of the cylindrical pipeline is hemispherical, and is communicated with the convergent pipeline; and one to three sand blasting holes are axially machined on the sidewall of the pressure guide sand blaster. The fracturing tool has high construction efficiency, namely one trip of a pipe string can finish eight stages of fracturing per day, and a horizontal well can be fractured in a staged way, so that efficiency is improved, and the construction cost is greatly decreased. The fracturing tool has the advantages of rational design, simple structure, high fracturing efficiency, low fracturing cost and the like, and can be popularized and used for straight wells and horizontal oil-gas wells.
Description
Technical field
The utility model belongs to producing oil, gas, water from well; Solubility maybe can be dissolved the method or the equipment technical field of material or slurry of mineral, is specifically related to a kind of two envelope single deck tape-recorder staged fracturing tool.
Background technology
Horizontal well technology is emerging at home in recent years DP technology technology, and it can increase the contact area of well and oil reservoir, strengthens drainage area, reduces filtrational resistance, improves the whole development effect in oil field.Horizontal well production, gas technology have special superiority and obtain increasingly extensive application.But, in the horizontal well production technical application, also run into the technical problem that some are eager to solve.
Because oil reservoirs of horizontal well section span is longer, there is big non-homogeneity in oil reservoir, and quite a few horizontal well horizontal segment employing sieve tube completion technology, has brought sizable difficulty so just for the horizontal well staged fracturing.Fractured horizontal well generally adopts general current limliting staged fracturing, mechanical packer and can drag for bridging plug and carry out staged fracturing, jetting staged fracturing, these staged fracturing equipment, and the engineering time is long, and segmentation is few, and cost is high.And because the horizontal well self structure exists inclination section and horizontal segment; Fracturing string, stressed and sand setting situation and straight well differ greatly; Existing fracturing tool string can only descend the straight well section; There is the restive shortcoming in crack in the general limited entry fracture treatment of carrying out horizontal well, and the use of conventional fracturing tool is restricted.
The utility model content
The utility model technical problem to be solved is to overcome the shortcoming of above-mentioned fracturing tool, and two envelope single deck tape-recorder staged fracturing tools that a kind of simple in structure, pressure break efficient is high, the pressure break cost is low are provided.
Solving the problems of the technologies described above the technical scheme that is adopted is: in the lower end of last centralizer hydraulic anchor is set; The lower end of hydraulic anchor is provided with upper packer; The upper packer lower end is provided with down centralizer; The lower end of following centralizer is provided with the pilot sandblaster, and the lower end of pilot sandblaster is provided with lower packet, and the lower end of lower packet is provided with plug.Above-mentioned pilot sandblaster is: pilot sandblaster internal upper part is contracted channel from top to bottom for contracted channel, middle part from top to bottom are cylindrical pipe, lower end; The cylindrical pipe upper end links for hemispherical and with contracted channel, axially is processed with 1～3 sandblast hole b on the sidewall of pilot sandblaster.
The sandblast hole b of the utility model is shaped as rectangle, and rectangular length is 40～90mm, the wide 10～30mm of being.
The small end internal diameter of the pilot sandblaster internal upper part contracted channel of the utility model is 8～20mm.
The utility model adopts between the minor diameter twin packer pilot sandblaster is set; Be processed with sand jet outlet on the pilot sandblaster; Sand inlet is a contracted channel; Sand is got into by sand inlet, from sand jet outlet ejection target zone is carried out pressure break, then through backwash, on put forward the pressure break mode that realizes a plurality of intervals of one-trip string pressure break.This fracturing tool, efficiency of construction is high, and one-trip string can be accomplished 6～8 laminations and split, and saves the engineering time, has reduced the labour intensity of operating worker, has improved efficient greatly, has reduced the pressure break cost.The utlity model has that reasonable in design, simple in structure, pressure break efficient is high, the pressure break low cost and other advantages, can at straight well and horizontal oil gas is aboveground promote the use of.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model.
Fig. 2 is the structural representation of pilot sandblaster 5 among Fig. 1.
The specific embodiment
To the utility model further explain, but the utility model is not limited to these embodiment below in conjunction with accompanying drawing and embodiment.
Embodiment 1
In Fig. 1, two envelope single deck tape-recorder staged fracturing tools of present embodiment are by last centralizer 1, hydraulic anchor 2, upper packer 3, centralizer 4, pilot sandblaster 5, lower packet 6, plug 7 connect and constitute down.
Lower end at last centralizer 1 connects with the upper end of hydraulic anchor 2 through screw thread; Hydraulic anchor 2 is used for the utility model and in well, the utility model is fixed on well casing during operation, and the lower end of hydraulic anchor 2 connects with the upper end of upper packer 3 through screw thread, and upper packer 3 lower ends are passed through screw thread and connected with the upper end of following centralizer 4; Last centralizer 1 is used for the utility model with following centralizer 4 and when going into the well, sets upright; Prevent swing, following centralizer 4 connects with the upper end of pilot sandblaster 5 through screw thread, and the lower end of pilot sandblaster 5 connects with the upper end of lower packet 6 through screw thread; Upper packer 3 is used for the utility model when the downhole perforation pressure break with lower packet 6; The sand that prevents 5 ejections of pilot sandblaster makes progress, flows downward, and concentrates perforating and fracturing, and two packers can be controlled each interval perforating and fracturing scale.The lower end of lower packet 6 connects with the upper end of plug 7 through screw thread.
Fig. 2 has provided the structural representation of pilot sandblaster 5 among Fig. 1.In Fig. 2, be processed with internal thread in the upper end of pilot sandblaster 5, be used for passing through thread connection with the lower end of following centralizer 4, be processed with external screw thread outside the lower end of pilot sandblaster 5, be used for passing through thread connection with the upper end of lower packet 6.Pilot sandblaster 5 internal upper part internal threads are down contracted channel from top to bottom; The small end internal diameter of contracted channel is 14mm, and the middle part is a cylindrical pipe in the pilot sandblaster 5, and cylindrical pipe and contracted channel link; The cylindrical pipe upper end is a hemispherical; The lower end of cylindrical pipe is contracted channel from top to bottom, and to being processed with 2 sandblast hole b, 2 sandblast hole b are uniformly distributed with and are arranged in pilot sandblaster 5 axial medium positions at the side-wall shaft of pilot sandblaster 5; Sandblast hole b is shaped as rectangle, and the length of sandblast hole b is 65mm, widely is 20mm.
Two envelope single deck tape-recorder staged fracturing tools of this structure are during use, after the one section formation fracturing in down-hole is intact; Carry out pressure break again with mentioning another section oil reservoir on the utility model; One-trip string can be accomplished 6～8 laminations and split, and saves the engineering time, has reduced the labour intensity of operating worker; Improve efficient greatly, reduced the pressure break cost.
In the present embodiment, be processed with internal thread in the upper end of pilot sandblaster 5, be processed with external screw thread outside the lower end of pilot sandblaster 5; Pilot sandblaster 5 internal upper part internal threads are down contracted channel from top to bottom; The small end internal diameter of contracted channel is 8mm, and the middle part is a cylindrical pipe in the pilot sandblaster 5, and cylindrical pipe and contracted channel link; The cylindrical pipe upper end is a hemispherical; The lower end of cylindrical pipe is contracted channel from top to bottom, and to being processed with 2 sandblast hole b, 2 sandblast hole b are uniformly distributed with and are arranged in pilot sandblaster 5 axial medium positions at the side-wall shaft of pilot sandblaster 5; Sandblast hole b is shaped as rectangle, and the length of sandblast hole b is 40mm, widely is 10mm.The connecting relation of other component and component is identical with embodiment 1.
In the present embodiment, be processed with internal thread in the upper end of pilot sandblaster 5, be processed with external screw thread outside the lower end of pilot sandblaster 5; Pilot sandblaster 5 internal upper part internal threads are down contracted channel from top to bottom; The small end internal diameter of contracted channel is 20mm, and the middle part is a cylindrical pipe in the pilot sandblaster 5, and cylindrical pipe and contracted channel link; The cylindrical pipe upper end is a hemispherical; The lower end of cylindrical pipe is contracted channel from top to bottom, and to being processed with 2 sandblast hole b, 2 sandblast hole b are uniformly distributed with and are arranged in pilot sandblaster 5 axial medium positions at the side-wall shaft of pilot sandblaster 5; Sandblast hole b is shaped as rectangle, and the length of sandblast hole b is 90mm, widely is 30mm.The connecting relation of other component and component is identical with embodiment 1.
In above embodiment 1～3; At the side-wall shaft of pilot sandblaster 5 to being processed with 1 sandblast hole b; Sandblast hole b is shaped as rectangle, and the geometry of sandblast hole b is identical with respective embodiments, and the geometry at other position of pilot sandblaster 5 is identical with respective embodiments.The connecting relation of other component and component is identical with embodiment 1.
In above embodiment 1～3; Side-wall shaft at pilot sandblaster 5 is processed with 3 sandblast hole b to being uniformly distributed with; Sandblast hole b is shaped as rectangle; Angle between the center line of the center line of a sandblast hole b and an adjacent sandblast hole b is 120 °, and the geometry of sandblast hole b is identical with respective embodiments, and the geometry at its position of other of pilot sandblaster 5 is identical with respective embodiments.The connecting relation of other component and component is identical with embodiment 1.
According to above-mentioned principle, also can design two envelope single deck tape-recorder staged fracturing tools of other a kind of concrete structure, but all within the protection domain of the utility model.
Claims (3)
1. one kind pair is sealed the single deck tape-recorder staged fracturing tool; In the lower end of last centralizer (1) hydraulic anchor (2) is set; The lower end of hydraulic anchor (2) is provided with upper packer (3); Upper packer (3) lower end is provided with down centralizer (4), and the lower end of following centralizer (4) is provided with pilot sandblaster (5), and the lower end of pilot sandblaster (5) is provided with lower packet (6); The lower end of lower packet (6) is provided with plug (7); It is characterized in that described pilot sandblaster (5) is: pilot sandblaster (5) internal upper part is contracted channel from top to bottom for contracted channel, middle part from top to bottom are cylindrical pipe, lower end, and the cylindrical pipe upper end links for hemispherical and with contracted channel, axially is processed with 1～3 sandblast hole (b) on the sidewall of pilot sandblaster (5).
2. according to the described two envelope single deck tape-recorder staged fracturing tools of claim 1, it is characterized in that: described sandblast hole (b) be shaped as rectangle, rectangular length is 40～90mm, the wide 10～30mm of being.
3. according to the described two envelope single deck tape-recorder staged fracturing tools of claim 1, it is characterized in that: the small end internal diameter of described pilot sandblaster (5) internal upper part contracted channel is 8～20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203787773U CN202250014U (en) | 2011-10-08 | 2011-10-08 | Dual-packing single-clamping staged fracturing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203787773U CN202250014U (en) | 2011-10-08 | 2011-10-08 | Dual-packing single-clamping staged fracturing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202250014U true CN202250014U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203787773U Expired - Lifetime CN202250014U (en) | 2011-10-08 | 2011-10-08 | Dual-packing single-clamping staged fracturing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202250014U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213894A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Selective repeated fracturing process technology for old well of oil field |
| CN104213893A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Perforation and fracturing integrated tubular column for selectively and repeatedly reforming old well of oil field and working method thereof |
| CN105221094A (en) * | 2015-09-23 | 2016-01-06 | 中国石油天然气股份有限公司 | Horizontal well double-sealing single-clamp blowout prevention process |
-
2011
- 2011-10-08 CN CN2011203787773U patent/CN202250014U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213894A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Selective repeated fracturing process technology for old well of oil field |
| CN104213893A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Perforation and fracturing integrated tubular column for selectively and repeatedly reforming old well of oil field and working method thereof |
| CN104213893B (en) * | 2013-06-05 | 2016-08-10 | 中国石油天然气股份有限公司 | Perforation and fracturing integrated tubular column for selectively and repeatedly reforming old well of oil field and working method thereof |
| CN104213894B (en) * | 2013-06-05 | 2016-09-07 | 中国石油天然气股份有限公司 | Selective repeated fracturing process for old well of oil field |
| CN105221094A (en) * | 2015-09-23 | 2016-01-06 | 中国石油天然气股份有限公司 | Horizontal well double-sealing single-clamp blowout prevention process |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |