CN108194071A - 3 very little half sidetracking slim hole staged fracturing string - Google Patents
3 very little half sidetracking slim hole staged fracturing string Download PDFInfo
- Publication number
- CN108194071A CN108194071A CN201711365509.6A CN201711365509A CN108194071A CN 108194071 A CN108194071 A CN 108194071A CN 201711365509 A CN201711365509 A CN 201711365509A CN 108194071 A CN108194071 A CN 108194071A
- Authority
- CN
- China
- Prior art keywords
- cun
- pipe
- packer
- sidetracking
- bridge plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004576 sand Substances 0.000 claims abstract description 13
- 210000002445 nipple Anatomy 0.000 claims description 17
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000011001 backwashing Methods 0.000 abstract 3
- 230000003014 reinforcing effect Effects 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a 3-inch half sidetracking slim hole staged fracturing string which comprises an oil pipe, a reinforcing short section, a hydraulic anchor, a backwashing valve, a packer, a setting ball seat, a sand blaster, a ball receiving basket, a 3-inch half sidetracking slim sleeve and an original sleeve; drilling a small hole by windowing in an original casing, cementing and completing the well by using a 3-inch half-side drilling small casing, wherein a reinforcing short section, a hydraulic anchor, a backwashing valve, a packer, a setting ball seat, a sand sprayer and a ball receiving basket are all positioned in the 3-inch half-side drilling small casing, an oil pipe, a variable-buckle short section and a safe release are all positioned in the original casing, and the oil pipe, the safe release, the variable-buckle short section, the reinforcing short section, the hydraulic anchor, the backwashing valve, the packer, the setting ball seat, the sand sprayer and the ball receiving basket are sequentially communicated from top to bottom; the firepower perforation is implemented from bottom to top in the 3 cun half side bores the little sleeve pipe in proper order and is mended hole, fracturing, adopts and fills in sand or bridge plug shutoff down, until accomplishing all intervals fracturing, wherein, the perforation section is located the below of receiving the ball basket, and staged fracturing can be realized to this tubular column to the sticking of tool risk is less.
Description
Technical field
The present invention relates to a kind of fracturing strings, and in particular to a kind of 3 cun of half side tracked slim hole fracturing strings.
Background technology
As most domestic oil reservoir progresses into mid-later development phase, stratum remaining oil is effectively employed, fully excavates oil reservoir
Potentiality, low cost keep old area stable yields to seem particularly urgent, consider reduce drilling well input, land expropriation cost, ground installation into
The factors such as this are paid more and more attention in the former old new wellbore of well section sidetracking as a kind of effective technology.For series of strata
More reservoir, development side tracked slim hole staged fracturing is significant for fully excavating reservoir potentiality, and Kazakhstan etc. is spat in the long celebrating in the country
Oil field starts to explore the technology, but there has been no the reports of side tracked slim hole staged fracturing transformation.
Conventional small-well cracking is primarily present following deficiency：Individual layer pressure break or multi-layer pressured is usually taken, can not realize
Effective staged fracturing；Bit freezing risk is big, and intractability is big, and supporting technology is immature.
Invention content
The shortcomings that it is an object of the invention to overcome the above-mentioned prior art, provides a kind of 3 cun of half side tracked slim hole segmentation
Fracturing string, which can realize staged fracturing, and bit freezing risk is smaller.
In order to achieve the above objectives, 3 cun of half side tracked slim hole fracturing strings of the present invention are short including oil pipe, reinforcement
Section, hydraulic anchor, backwash valve, packer, setting ball seat, sanding machine, basket of receiving, 3 cun of half sidetracking small casing and tunica pipe；
Slim-hole is opened, then by using 3 cun of half sidetracking small casing well cementation completion, strengthen pipe nipple, water in tunica pipe inwardly opened window brill
Power anchor, backwash valve, packer, setting ball seat, sanding machine and basket of receiving are respectively positioned in 3 cun of half sidetracking small casing, and oil pipe, variable buckle are short
Section and safety are given up and are respectively positioned in tunica pipe, and oil pipe, safety are given up, variable buckle pipe nipple, strengthen pipe nipple, hydraulic anchor, backwash valve, packing
Device, setting ball seat, sanding machine and basket of receiving are sequentially connected logical from top to bottom；
Implement firepower perforation perforations adding, pressure break in 3 cun of half sidetracking small casing successively from bottom to top, using back-up sand or lower bridge plug
It blocks, until completing the pressure break of 3 cun of half all interval of side tracked slim hole.
3 cun of half sidetracking small casing upper end is sealed by hanger and tunica inside pipe wall.
The block section can fill sand grains.
The block section can descend bridge plug.
The bridge plug is retrievable bridge plug, can bore bridge plug or dissolvable bridge plug.
The packer is Y341 packers.
The invention has the advantages that：
3 cun of half side tracked slim hole fracturing strings of the present invention are in concrete operations, to well head pitching, when ball is fallen
After on to setting ball seat, pit shaft builds the pressure, and so as to make the pressure rise in pit shaft, and then packer is caused to complete packing, Ran Houji
The continuous pressure improved in pit shaft, to cut the shear pin in setting ball seat, receives so as to fall into ball in basket, you can normally enter pressure
It splits program, after pressure break, then open flow, backwash and above carries deblocking packer, recur out fracturing string, and tripping in bridge plug suppresses seat
Envelope or back-up sand insulate lower part with fractured interval, and the pressure break of remaining section layer, subsection efect are finally sequentially completed further according to above-mentioned steps
It is good, and the potentiality of reservoir can be fully excavated, bit freezing risk is smaller.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 for basket of receiving, 2 it is sanding machine, 3 be setting ball seat, 4 be packer, 5 be backwash valve, 6 is hydraulic anchor, 7
For strengthen pipe nipple, 8 be variable buckle pipe nipple, 9 be to give up safely.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
With reference to figure 1,3 cun of half side tracked slim hole fracturing strings of the present invention include oil pipe, strengthen pipe nipple 7, water
Power anchor 6, backwash valve 5, packer 4, setting ball seat 3, sanding machine 2, receive 1,3 cun of half sidetracking small casing of basket and tunica pipe；In original
Somewhere is bored using specific purpose tool windowing and opens slim-hole in casing, then is cemented the well completion with 3 cun of half sidetracking small casing, strengthens pipe nipple 7, water
Power anchor 6, backwash valve 5, packer 4, setting ball seat 3, sanding machine 2 and basket 1 of receiving are respectively positioned in 3 cun of half sidetracking small casing, oil pipe,
Variable buckle pipe nipple 8 and safety are given up and 9 are respectively positioned in tunica pipe, oil pipe, safety give up 9, variable buckle pipe nipple 8, strengthen pipe nipple 7, hydraulic anchor
6th, backwash valve 5, packer 4, setting ball seat 3, sanding machine 2 and basket 1 of receiving are sequentially connected logical from top to bottom；The 3 cun of half small set of sidetracking
Implement firepower perforation perforations adding, pressure break in pipe successively from bottom to top, using back-up sand or lower bridge plugging, until 3 cun of completion is half side
The pressure break of all intervals of feel ahead.
The outer wall of 3 cun of half sidetracking small casing upper end is hung on by hanger on the inner wall of tunica pipe；The block section can
Fill sand grains or lower bridge plug；Bridge plug is retrievable bridge plug, can bore bridge plug or dissolvable bridge plug；Packer 4 is Y341 packers.
The present invention specific operation process be：
Formation testing team completes to lead to as requested, clean-out service, then tripping in perforating gun implements first segment perforation, then by pressure break pipe
In 3 cun of half side tracked slim hole of column tripping in, wherein, fracturing string needs to accurately measure and records oil pipe and well during tripping in
The length of lower tool when suspending weight decline 2-3 ton hours, then judges variable buckle pipe nipple 8 whether at the position of hanger, when variable buckle is short
When section 8 is at the position of hanger, then tubing string is above carried to 0.5 meter, to avoid damage hanger, then adjust packer 4 and set
Position, the position that adjustment pipe nipple adjusts tool, then turn on pump direct circulation, and to well head pitching, when ball is fallen are increased and decreased by well head
To after setting ball seat 3, pit shaft builds the pressure, so as to make the pressure rise in pit shaft, and cause packer 4 complete packing, when 3 cun it is half side
When brill small casing does not return liquid, then packer 4 is normally set, and then proceedes to improve the pressure in pit shaft, to cut in setting ball seat 3
Shear pin, receive in basket 1 so as to fall into ball, oil pipe is connected by sanding machine 2 with 3 cun of half side tracked slim hole, at this time
Into fracturing procedures, after pressure break, then carry out open flow, backwash, above carry deblocking packer 4, recur out fracturing string, tripping in bridge
Plug suppress set or directly back-up sand insulate lower part with fractured interval, then implement the pressure of remaining interval successively according to above step
It splits, until all sections of layers have been pressed；
After last tripping in specific purpose tool salvaging, brill mill bridge plug or waiting bridge plug dissolving, then carry out sand washing, well-flushing and operation.
Claims (6)
1. a kind of 3 cun of half side tracked slim hole fracturing strings, which is characterized in that including oil pipe, strengthen pipe nipple (7), hydraulic anchor
(6), backwash valve (5), packer (4), setting ball seat (3), sanding machine (2), basket of receiving (1), 3 cun of half sidetracking small casing and tunica
Pipe；
Slim-hole is opened, then by using 3 cun of half sidetracking small casing well cementation completion, strengthen pipe nipple (7), waterpower in tunica pipe inwardly opened window brill
Anchor (6), backwash valve (5), packer (4), setting ball seat (3), sanding machine (2) and basket of receiving (1) are respectively positioned on the 3 cun of half small set of sidetracking
In pipe, oil pipe, variable buckle pipe nipple (8) and safe give up (9) are respectively positioned in tunica pipe, oil pipe, safe give up (9), variable buckle pipe nipple
(8), strengthen pipe nipple (7), hydraulic anchor (6), backwash valve (5), packer (4), setting ball seat (3), sanding machine (2) and basket of receiving
(1) it is sequentially connected from top to bottom logical；
Implement firepower perforation perforations adding, pressure break successively from bottom to top in 3 cun of half sidetracking small casing, sealed using back-up sand or lower bridge plug
It is stifled, until completing the pressure break of 3 cun of half all interval of side tracked slim hole.
2. 3 cun of half side tracked slim hole fracturing strings according to claim 1, which is characterized in that the 3 cun of half small set of sidetracking
Pipe upper end passes through hanger and the inner wall sealing of tunica pipe.
3. 3 cun of half side tracked slim hole fracturing strings according to claim 1, which is characterized in that the block section energy
Enough fill sand grains.
4. 3 cun of half side tracked slim hole fracturing strings according to claim 1, which is characterized in that the block section energy
Enough descend bridge plug.
5. 3 cun of half side tracked slim hole fracturing strings according to claim 4, which is characterized in that the bridge plug is can
Fishing formula bridge plug can bore bridge plug or dissolvable bridge plug.
6. 3 cun of half side tracked slim hole fracturing strings according to claim 1, which is characterized in that the packer (4)
For Y341 packers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711365509.6A CN108194071A (en) | 2017-12-18 | 2017-12-18 | 3 very little half sidetracking slim hole staged fracturing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711365509.6A CN108194071A (en) | 2017-12-18 | 2017-12-18 | 3 very little half sidetracking slim hole staged fracturing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108194071A true CN108194071A (en) | 2018-06-22 |
Family
ID=62574367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711365509.6A Pending CN108194071A (en) | 2017-12-18 | 2017-12-18 | 3 very little half sidetracking slim hole staged fracturing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108194071A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403943A (en) * | 2018-09-26 | 2019-03-01 | 中国石油天然气股份有限公司 | Staged fracturing method for 3-inch half sidetracking horizontal well |
| CN111219177A (en) * | 2020-03-03 | 2020-06-02 | 中国石油天然气股份有限公司 | Fracturing method for 3-inch half-slim well of ultra-low permeability sandstone reservoir sidetracking horizontal well |
| CN112267866A (en) * | 2020-11-05 | 2021-01-26 | 中国石油天然气股份有限公司 | Small-diameter pipe staged fracturing production pipe column and method for side drilling well and small-hole well |
| CN112282718A (en) * | 2020-11-05 | 2021-01-29 | 中国石油天然气股份有限公司 | Combined pipe string for sidetracking well and slim hole well and use method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624904A (en) * | 2009-08-14 | 2010-01-13 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Open hole completion well sand resistant pipe string of sidetracking branch well and inserting type acid cleaning filling inner pipe string thereof |
-
2017
- 2017-12-18 CN CN201711365509.6A patent/CN108194071A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624904A (en) * | 2009-08-14 | 2010-01-13 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Open hole completion well sand resistant pipe string of sidetracking branch well and inserting type acid cleaning filling inner pipe string thereof |
Non-Patent Citations (2)
| Title |
|---|
| 李军: "Φ89mm套管小井眼压裂技术研究", 《吐哈油气》 * |
| 马勇: "分层压裂管柱技术在吐哈油田的应用", 《石油矿场机械》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403943A (en) * | 2018-09-26 | 2019-03-01 | 中国石油天然气股份有限公司 | Staged fracturing method for 3-inch half sidetracking horizontal well |
| CN111219177A (en) * | 2020-03-03 | 2020-06-02 | 中国石油天然气股份有限公司 | Fracturing method for 3-inch half-slim well of ultra-low permeability sandstone reservoir sidetracking horizontal well |
| CN111219177B (en) * | 2020-03-03 | 2022-05-10 | 中国石油天然气股份有限公司 | 3-inch and half-small-borehole fracturing method for sidetracking horizontal well of ultra-low permeability sandstone reservoir |
| CN112267866A (en) * | 2020-11-05 | 2021-01-26 | 中国石油天然气股份有限公司 | Small-diameter pipe staged fracturing production pipe column and method for side drilling well and small-hole well |
| CN112282718A (en) * | 2020-11-05 | 2021-01-29 | 中国石油天然气股份有限公司 | Combined pipe string for sidetracking well and slim hole well and use method |
| CN112267866B (en) * | 2020-11-05 | 2022-11-04 | 中国石油天然气股份有限公司 | Small-diameter pipe staged fracturing production pipe column and method for side drilling well and small-hole well |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180622 |