CN104343430A - Method for staged fracturing of well cementation casing string and tool for method - Google Patents
Method for staged fracturing of well cementation casing string and tool for method Download PDFInfo
- Publication number
- CN104343430A CN104343430A CN201310341090.6A CN201310341090A CN104343430A CN 104343430 A CN104343430 A CN 104343430A CN 201310341090 A CN201310341090 A CN 201310341090A CN 104343430 A CN104343430 A CN 104343430A
- Authority
- CN
- China
- Prior art keywords
- ball seat
- well
- sliding sleeve
- pressure break
- casing string
- 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
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000004568 cement Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 19
- 208000034656 Contusions Diseases 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241001656951 Protheca Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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)
- Earth Drilling (AREA)
Abstract
The invention discloses a method for staged fracturing of a well cementation casing string and a tool for the method. The method and the tool are particularly suitable for implementation of staged fracturing and matched well completion after well cementation in oil-gas well engineering. The method is characterized in that hydraulic reducing ball seat sleeve sliding sleeve switch tools (3) are connected in series in a casing string (2) to descend a well, when the tools go down to the designed depth, cement paste is pumped into the well for well cementation, a sleeve is fixed in a ground layer (1), after well cementation, the sealing sleeves of all the hydraulic reducing ball seat sleeve sliding sleeve switch tools (3) are opened in sequence by colliding rubber plugs, cement paste on the inner wall of the casing string is removed, the pressure is built, the hydraulic reducing ball seat sleeve sliding sleeve switch tools (3) seal ball seats for diameter change, and the diameters of the ball seats are increased from the bottom of the well to the top in sequence, so that ball throwing staged fracturing operation can be carried out. Compared with a similar technology, the method and the tool have the benefits that before colliding, the casing string has a drift diameter which is the same in diameter so as to ensure that the well cementation colliding rubber plugs descend smoothly; cement takes the place of cement paste in the clean casing string, so that the success rate of colliding is high.
Description
Technical field
The present invention relates to a kind of method and instrument thereof of tubing string classification pressure break of cementing the well, be particularly applicable in Oil-Gas Well Engineering, after well cementation, implement the supporting completion construction of classification pressure break.
Technical background
For unconventionaloil pool such as Low permeable oil and gas reservoirs, shale oil gas, well cementation pressure break is a kind of tender budget of the most common most important completion, and mode is varied: perforation integral hydraulic fracturing, lower interior pipe classification pressure break, high-pressure water jet fixed point pressure break, pumping bridging plug connection seat pressure break etc.Integral hydraulic fracturing effect does not have hierarchical segmented fracturing effect good, and lower interior pipe classification pressure break, pumping bridging plug connection seat pressure break equal segments classification pressure break mode operating procedure is loaded down with trivial details.Present with the immediate a kind of well-cementing staged-fracturing technical method of the present invention is: ball seat sliding sleeve switch of directly connecting on the position casing string needing pressure break, ball seat latus rectum is the order diminished successively from top to bottom, normal procedure is cemented the well, then pitching pressure break orlop section, throw secondary large ball pressure break time interval again, repetition like this, completes the classification pressure break of each section.Problems existing is, ball seat diameter is constant, diminishes successively from top to bottom, makes cementing plug be difficult to replace the whole cement pastes in clean casing string, there is sliding sleeve by the risk of cement paste cementation, and cause staged fracturing to construct unsuccessfully.
Summary of the invention
The object of this invention is to provide a kind of method and instrument thereof of tubing string classification pressure break of cementing the well, during well cementation, the diameter of pitching ball seat is identical with casing diameter, the cement paste of pipe string internal wall can be scraped totally by cementing plug, avoid sliding sleeve to be clung by cement paste, thus improve the success rate of the rear classification pressing crack construction of well cementation.
The present invention is achieved in that the method for its well cementation tubing string classification pressure break is: a, determine to implement the interval that well needs pressure break according to design, determines quantity and the position of the hydraulic variable diameter ball seat sliding sleeve of bushing switching tools needed; B, order from shaft bottom to well head, by the sequential arrangement hydraulic variable diameter ball seat sliding sleeve of bushing switching tools from small to large of diameter after ball seat undergauge; C, hydraulic variable diameter ball seat sliding sleeve of bushing switching tools is serially connected in casing string by design and goes into the well; D, when under sleeve pipe to projected depth time, in well, squeeze into cement paste carry out well cementing operation, by solid for sleeve pipe in stratum, after well cementation, bruising plug opens the sealing shroud of all hydraulic reducing ball seat sliding sleeve of bushing switching tools successively, remove pipe string internal wall cement paste, build the pressure, hydraulic variable diameter ball seat sliding sleeve of bushing switching tools sealed ball seat reducing, ball seat diameter upwards increases successively from shaft bottom.E, enforcement fracturing work, first build the pressure during pressure break, open the fluid power switch of foot, implement first order pressure break; After f, one-level pressure break, pitching, pitching, on the ball seat of the hydraulic variable diameter ball seat sliding sleeve of bushing switching tools of foot, opens secondary pressure break passage, implements second level pressure break, repeats pitching, fracturing step, complete the pressing crack constructions at different levels on stratum after secondary pressure break.
A kind of special tool-hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) of the method for tubing string classification pressure break of cementing the well, it is made up of body, sliding sleeve, ball seat, at body built with a liquid cylinder, a sealing shroud is equipped with in liquid cylinder bottom, sealing shroud and liquid cylinder junction are provided with a liquid flow hole, at liquid cylinder built with piston, upper piston area is provided with a ball seat, at body upper part, sliding sleeve is housed, sliding sleeve is connected with ball seat, ball seat is reducing ball seat, and sliding sleeve place body has pressure break passage.Its operating principle is: when cementing slurry replace hand over plug descending encounter sealing shroud time, sealing shroud is descending, opens liquid flow hole, when building the pressure in sleeve pipe, fluid pressure promotes piston driving ball seat by liquid flow hole and reduces reducing, during pressure break, pitching in sleeve pipe, the ball seat after pitching and reducing seals, under action of hydraulic force, it is descending that ball seat drives sliding sleeve to cut off pin, exposes the pressure break passage on body, and then implement the fracturing work on stratum.
The present invention compares with similar technique, and beneficial effect is: bruising protheca tubing string is the latus rectum that a diameter is identical, and well cementing impact pressure plug is smoothly descending, the cleaning that cement replaces, and bruising success rate is high; The present invention is that well cementation completion staged fracturing provides a kind of new technique, and relative to similar technique method, the invention process technique simplifies, cost is reasonable, reliability is high.
Accompanying drawing explanation
Fig. 1 is that the present invention constructs schematic diagram;
Fig. 2 is hydraulic variable diameter ball seat sliding sleeve of bushing switching tools schematic diagram.
Detailed description of the invention
Describe the present invention below in conjunction with accompanying drawing: the method for well cementation tubing string classification pressure break is: a, determine to implement the interval that well needs pressure break according to design, determine quantity and the position of hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) needed; B, order from shaft bottom to well head, by sequential arrangement hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) from small to large of diameter after ball seat undergauge; C, hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) is serially connected in casing string (2) by design and goes into the well; D, when under sleeve pipe to projected depth time, in well, squeeze into cement paste carry out well cementing operation, by solid for sleeve pipe in stratum (1), after well cementation, bruising plug opens the sealing shroud of all hydraulic reducing ball seat sliding sleeve of bushing switching tools (3) successively, remove pipe string internal wall cement paste, build the pressure, hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) sealed ball seat reducing, ball seat diameter upwards increases successively from shaft bottom.E, enforcement fracturing work, first build the pressure during pressure break, open the fluid power switch of foot, implement first order pressure break; After f, one-level pressure break, pitching, pitching is on the ball seat of hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) of foot, open secondary pressure break passage, implement second level pressure break, repeat pitching, fracturing step after secondary pressure break, complete the pressing crack constructions at different levels on stratum (1).
A kind of special tool-hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) of the method for tubing string classification pressure break of cementing the well, it is by body (3.1), sliding sleeve (3.7), ball seat (3.6) forms, at body (3.1) built with a liquid cylinder (3.4), a sealing shroud (3.2) is equipped with in liquid cylinder (3.4) bottom, sealing shroud (3.2) and liquid cylinder (3.4) junction are provided with a liquid flow hole (3.3), at liquid cylinder (3.4) built with piston (3.5), piston (3.5) top is provided with a ball seat (3.6), on body (3.1) top, sliding sleeve (3.7) is housed, sliding sleeve (3.7) is connected with ball seat (3.6), ball seat (3.6) is reducing ball seat, sliding sleeve (3.7) place body has pressure break passage (3.8).Its operating principle is: when cementing slurry replace hand over plug descending encounter sealing shroud (3.2) time, sealing shroud (3.2) is descending, open liquid flow hole (3.3), when building the pressure in sleeve pipe, fluid pressure promotes piston (3.5) by liquid flow hole (3.3) and drives ball seat (3.6) to reduce reducing, during pressure break, pitching in sleeve pipe, ball seat (3.6) after pitching and reducing seals, under action of hydraulic force, it is descending that ball seat (3.6) drives sliding sleeve (3.7) to cut off pin (3.9), expose the pressure break passage (3.8) on body, and then implement the fracturing work on stratum.
Claims (2)
1. a method for tubing string classification pressure break of cementing the well, is characterized in that: according to design, a. determines that enforcement well needs the interval of pressure break, determine quantity and the position of hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) needed; B. the order from shaft bottom to well head, by sequential arrangement hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) from small to large of diameter after ball seat undergauge; C. hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) is serially connected in casing string (2) by design and goes into the well; D. when arriving projected depth under sleeve pipe; in well, squeeze into cement paste carry out well cementing operation; by solid for sleeve pipe in stratum (1); after well cementation, bruising plug opens the sealing shroud of all hydraulic reducing ball seat sliding sleeve of bushing switching tools (3) successively; remove pipe string internal wall cement paste; build the pressure, hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) sealed ball seat reducing, ball seat diameter upwards increases successively from shaft bottom; E. implement fracturing work, first build the pressure during pressure break, open the fluid power switch of foot, implement first order pressure break; F. after one-level pressure break, pitching, pitching is on the ball seat of hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) of foot, open secondary pressure break passage, implement second level pressure break, repeat pitching, fracturing step after secondary pressure break, complete the pressing crack constructions at different levels on stratum.
2. special tool-hydraulic variable diameter ball seat sliding sleeve of bushing switching tools (3) of a kind of method for tubing string classification pressure break of cementing the well according to claim 1, it is by body (3.1), sliding sleeve (3.7), ball seat (3.6) forms, it is characterized in that at body (3.1) built with a liquid cylinder (3.4), a sealing shroud (3.2) is equipped with in liquid cylinder (3.4) bottom, sealing shroud (3.2) and liquid cylinder (3.4) junction are provided with a liquid flow hole (3.3), at liquid cylinder (3.4) built with piston (3.5), piston (3.5) top is provided with a ball seat (3.6), on body (3.1) top, sliding sleeve (3.7) is housed, sliding sleeve (3.7) is connected with ball seat (3.6), ball seat (3.6) is reducing ball seat, sliding sleeve (3.7) place body has pressure break passage (3.8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310341090.6A CN104343430A (en) | 2013-08-07 | 2013-08-07 | Method for staged fracturing of well cementation casing string and tool for method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310341090.6A CN104343430A (en) | 2013-08-07 | 2013-08-07 | Method for staged fracturing of well cementation casing string and tool for method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104343430A true CN104343430A (en) | 2015-02-11 |
Family
ID=52499816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310341090.6A Pending CN104343430A (en) | 2013-08-07 | 2013-08-07 | Method for staged fracturing of well cementation casing string and tool for method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104343430A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005628A (en) * | 2017-11-28 | 2018-05-08 | 中国石油集团渤海钻探工程有限公司 | Well cementation, pressure break, production integration tubing string and construction method |
| CN109707358A (en) * | 2017-10-25 | 2019-05-03 | 中海石油(中国)有限公司上海分公司 | Fracturing string and its fracturing process |
| CN113719256A (en) * | 2021-09-17 | 2021-11-30 | 西南石油大学 | Variable-diameter ball seat well cementation sliding sleeve for infinite-stage fracturing of horizontal well |
| CN116084904A (en) * | 2023-01-09 | 2023-05-09 | 新疆敦华绿碳技术股份有限公司 | CO capable of multiple linkage protection 2 Auxiliary pressurizing device and method for fracturing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030183391A1 (en) * | 2002-04-02 | 2003-10-02 | Hriscu Iosif J. | Multiple zones frac tool |
| CN201714364U (en) * | 2010-07-02 | 2011-01-19 | 中国石油集团川庆钻探工程有限公司 | Tubular column for horizontal well barefoot well completion staged fracturing acidizing tool |
| 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 |
| CN102345452A (en) * | 2010-08-05 | 2012-02-08 | 新疆华油油气工程有限公司 | Self-formed ball seat sliding sleeve |
| CN202157793U (en) * | 2011-07-08 | 2012-03-07 | 中国石油天然气股份有限公司 | Hydraulic ejecting tubular column for fracture acidizing |
| CN102979495A (en) * | 2012-12-28 | 2013-03-20 | 中国石油集团渤海钻探工程有限公司 | Multi-cluster current limiting fracturing string of open hole horizontal well and fracturing method thereof |
| CN203383784U (en) * | 2013-08-07 | 2014-01-08 | 胜利油田胜机石油装备有限公司 | Hydraulic reducing ball seat casing pipe sliding sleeve switching tool for staged fracturing |
-
2013
- 2013-08-07 CN CN201310341090.6A patent/CN104343430A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030183391A1 (en) * | 2002-04-02 | 2003-10-02 | Hriscu Iosif J. | Multiple zones frac tool |
| CN201714364U (en) * | 2010-07-02 | 2011-01-19 | 中国石油集团川庆钻探工程有限公司 | Tubular column for horizontal well barefoot well completion staged fracturing acidizing tool |
| CN102345452A (en) * | 2010-08-05 | 2012-02-08 | 新疆华油油气工程有限公司 | Self-formed ball seat sliding sleeve |
| CN202157793U (en) * | 2011-07-08 | 2012-03-07 | 中国石油天然气股份有限公司 | Hydraulic ejecting tubular column for fracture acidizing |
| 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 |
| CN102979495A (en) * | 2012-12-28 | 2013-03-20 | 中国石油集团渤海钻探工程有限公司 | Multi-cluster current limiting fracturing string of open hole horizontal well and fracturing method thereof |
| CN203383784U (en) * | 2013-08-07 | 2014-01-08 | 胜利油田胜机石油装备有限公司 | Hydraulic reducing ball seat casing pipe sliding sleeve switching tool for staged fracturing |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707358A (en) * | 2017-10-25 | 2019-05-03 | 中海石油(中国)有限公司上海分公司 | Fracturing string and its fracturing process |
| CN109707358B (en) * | 2017-10-25 | 2023-09-05 | 中海石油(中国)有限公司上海分公司 | Fracturing string and fracturing method thereof |
| CN108005628A (en) * | 2017-11-28 | 2018-05-08 | 中国石油集团渤海钻探工程有限公司 | Well cementation, pressure break, production integration tubing string and construction method |
| CN113719256A (en) * | 2021-09-17 | 2021-11-30 | 西南石油大学 | Variable-diameter ball seat well cementation sliding sleeve for infinite-stage fracturing of horizontal well |
| CN116084904A (en) * | 2023-01-09 | 2023-05-09 | 新疆敦华绿碳技术股份有限公司 | CO capable of multiple linkage protection 2 Auxiliary pressurizing device and method for fracturing |
| CN116084904B (en) * | 2023-01-09 | 2024-05-31 | 新疆敦华绿碳技术股份有限公司 | CO capable of multiple linkage protection2Auxiliary pressurizing device and method for fracturing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105178947B (en) | A kind of horizontal well looks for water blockoff integral method | |
| WO2016033983A1 (en) | Coiled tubing fracturing multistage tool string and utilization method | |
| CN105484719A (en) | Method for improving multi-cluster crack initiation effectiveness by blocking seams through multi-scale soluble balls | |
| CN103867177A (en) | Horizontal well fracturing method | |
| CN104343430A (en) | Method for staged fracturing of well cementation casing string and tool for method | |
| CN104564003A (en) | Drilling-plug-free pumping-in hydraulic bridge plug staged fracturing method | |
| CN100538003C (en) | The expansion sieve tube hanging method | |
| CN104179485A (en) | Cementation and fracture technique string and cementation and fracture technique process | |
| CN104695923A (en) | Method for realizing sectional multi-cluster fracture of horizontal well by adopting soluble balls | |
| CN104653136A (en) | General tubing downhole composite bridge plug drilling and grinding method | |
| CN203383784U (en) | Hydraulic reducing ball seat casing pipe sliding sleeve switching tool for staged fracturing | |
| CN207004498U (en) | Infinite stages switching sliding sleeve fracturing tool | |
| CN202990953U (en) | Blowout preventing mechanical anchor of screw pump | |
| CN204252929U (en) | Oil recovery water plugging string | |
| CN204175273U (en) | Pressure break sucker rod pump integrated pipe column | |
| DK2518263T3 (en) | Downhole cleaning system | |
| CN204492783U (en) | A kind of well cementation fracturing technology tubing string | |
| CN103790529A (en) | Coalbed methane drainage extraction and backwashing device and method | |
| CN203879424U (en) | Novel continuous sand removal device for oil and water well | |
| CN207598200U (en) | A kind of expansion tube section construction hydraulic oil cylinder device | |
| CN205297515U (en) | Coiled tubing drags hydraulic jet fracturing device | |
| CN204920866U (en) | Bore hole anchoring formula of washing ware of giving up | |
| CN105089554A (en) | Oil field horizontal well under-pressure dragging fracturing modification operation valve and reverse well-flushing unfreezing method | |
| CN110578507B (en) | Reusable sand blower for fracturing stratum of oil field | |
| CN204703869U (en) | Recover the oil with reacting cycle continuous flushing tubing string |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20150211 |