CN204082115U - Based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure - Google Patents
Based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure Download PDFInfo
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- CN204082115U CN204082115U CN201420482761.0U CN201420482761U CN204082115U CN 204082115 U CN204082115 U CN 204082115U CN 201420482761 U CN201420482761 U CN 201420482761U CN 204082115 U CN204082115 U CN 204082115U
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- volume fracturing
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Abstract
The utility model belongs to super-low permeability reservoir renovation technique field, for oil well horizontal well volume fracturing technique, be specifically related to a kind of horizontal well volume fracturing plumber skill post based on the dragging with pressure of conventional oil pipe, adopt conventional tubing transmission, packer packing is every construction layer, hydraulic jet perforation is carried out by hydraulic sand blasting, tie surface annular preventer combination fracturing tree belt pressure drags tubing string and realizes oil, gas well horizontal well contiguous segmentation volume fracturing is constructed, solve in existing volume fracturing construction technological process, need just can carry out the operation of dragging tubing string by open flow release strata pressure, extend the engineering time, increase the problem of construction cost, shorten the engineering time, improve efficiency of construction, reduce construction cost.
Description
Technical field
The utility model belongs to super-low permeability reservoir renovation technique field, for oil well horizontal well volume fracturing technique, is specifically related to a kind of horizontal well volume fracturing plumber skill post based on the dragging with pressure of conventional oil pipe.
Background technology
Along with the further exploitation in oil field, horizontal well volume fracturing process as a kind of efficient reforming mode using the major alterations mode as extra-low-permeability reservoir.Volume fracturing technology has the feature of large liquid measure, huge discharge, large sand amount, does not reach design displacement requirements by infusion in oil pipe, needs to inject with oil jacket annular space in oil pipe simultaneously.At present, the construction of some oilfield horizontal well volume fracturings is a large amount of to be adopted " packer packing is every construction layer; hydraulic jet perforation, oil jacket are with note; drag tubing string and realize from bottom to top successively volume fracturing construction ", but adopt the method execute man-hour requirement by open flow release strata pressure just can carry out the operation of dragging tubing string, extend the engineering time, increase construction cost.
Utility model content
The purpose of this utility model overcomes in existing volume fracturing construction technological process, needs just can carry out the operation of dragging tubing string by open flow release strata pressure, extends the engineering time, increase the problem of construction cost.
For this reason, the utility model provides a kind of horizontal well volume fracturing tubing string based on the dragging with pressure of conventional oil pipe, comprise oil pipe, the horizontal segment of oil pipe is connected with in turn can closing type hydrajet tool, pressure reduction controlled circulation valve, packer and righting-oriented device, and described hydrajet tool, pressure reduction controlled circulation valve, connected mode between packer and righting-oriented device are screwed connection.
Described hydrajet tool is that mechanical type can close waterpower spray gun.
Described packer is mechanical compression type packer.
Described pressure reduction controlled circulation valve comprises top connection, spool and lower contact, and the head of lower contact is sleeved on the afterbody of top connection and is fixed by stopping screw;
It is inner that spool is positioned at top connection and lower contact, and spool and top connection, be provided with O RunddichtringO between lower contact;
The sidewall of top connection and the sidewall cross-under of spool have same shear pin, and the bottom near shear pin on the sidewall of top connection offers through hole.
Described pressure reduction controlled circulation valve is normally close valve.
The beneficial effects of the utility model: this horizontal well volume fracturing plumber skill post based on the dragging with pressure of conventional oil pipe of the present utility model and fracturing process, adopt conventional tubing transmission, packer packing is every construction layer, hydraulic jet perforation is carried out by hydraulic sand blasting, tie surface annular preventer combination fracturing tree belt pressure drags tubing string and realizes oil, the construction of gas well horizontal well contiguous segmentation volume fracturing, shortens the engineering time, improves efficiency of construction, reduces construction cost.
Below with reference to accompanying drawing, the utility model is described in further details.
Accompanying drawing explanation
Fig. 1 is tubular column structure schematic diagram of the present utility model.
Fig. 2 is pressure reduction controlled circulation valve arrangement figure.
Description of reference numerals: 1, fracture well head; 2, annular preventer; 3, well head big four; 4, hydrajet tool; 5, pressure reduction controlled circulation valve; 6, packer; 7, righting-oriented device; 8, oil pipe; 9, oil jacket annular space; 10, top connection; 11, spool; 12, lower contact; 13, stopping screw; 14, shear pin; 15, through hole.
Detailed description of the invention
In order to overcome in existing volume fracturing construction technological process, just need carry out the operation of dragging tubing string by open flow release strata pressure, extend the engineering time, increase the problem of construction cost.Present embodiments provide a kind of horizontal well volume fracturing tubing string based on the dragging with pressure of conventional oil pipe, as shown in Figure 1, comprise oil pipe 8, the horizontal segment of oil pipe 8 is connected with in turn can closing type hydrajet tool 4, pressure reduction controlled circulation valve 5, packer 6 and righting-oriented device 7, described hydrajet tool 4, pressure reduction controlled circulation valve 5, connected mode between packer 6 and righting-oriented device 7 are screwed connection, hydrajet tool 4 can close waterpower spray gun for mechanical type, and packer 6 is mechanical compression type packer.
Waterpower spray gun can be closed, mechanical compression type packer is applied in oil field hydraulic jet perforation very extensive on, here its structure be not particularly limited to and illustrate, the requirement that routine can close waterpower spray gun, mechanical compression type packer can meet this tool string.
The tubular column structure of this structure, jointly will drag with fracture well head 1 when pressing crack construction, and use under the cooperation of annular preventer 2, realize dragging with pressure, avoid open flow to discharge strata pressure and just can carry out the operation of dragging tubing string, save the time, reduce construction cost.
Pressure reduction controlled circulation valve 5 is normally close valve, as shown in Figure 2, comprises top connection 10, spool 11 and lower contact 12, and the head of lower contact 12 is sleeved on the afterbody of top connection 10 and is fixed by stopping screw 13; It is inner that spool 11 is positioned at top connection 10 and lower contact 12, and spool 11 and top connection 10, be provided with O RunddichtringO between lower contact 12; The sidewall of top connection 10 and the sidewall cross-under of spool 11 have same shear pin 14, and the bottom near shear pin 14 on the sidewall of top connection 10 offers through hole 15.
For pressure reduction controlled circulation valve 5, be mainly used in packer 6 in work progress to lose efficacy, to such an extent as to spray gun uses when normally cannot open abrasive perforating, be normally off time conventional, when tubing string internal pressure is higher than o exterior pressure, with reference to Fig. 2, internal high pressure produces downward hydraulic action to spool 11, this hydraulic action cuts off shear pin 14, spool 11 moves down, liquid now inside and outside tubing string can be linked up by the through hole 15 above top connection 10, and then can realize the inside and outside circulation of tubing string, and safety pulls out of hole and changes drilling tool.
Utilize the fracturing process of the above-mentioned horizontal well volume fracturing tubing string based on the dragging with pressure of conventional oil pipe, comprise the steps,
1) bore under fastening means string:
Fracture well head 1 installs well head big four 3, annular preventer 2 from bottom to top successively;
Fastening means string successively, is from bottom to top: righting-oriented device 7+ packer 6+ pressure reduction controlled circulation valve 5+ can close hydrajet tool 4;
After boring under tool string, the hanger of well head lower flange is connected with oil pipe.
2) set: transfer to design attitude until tool string, by put-on and delegated tubing string, mechanical compression type packer selected here by packer 6, the slips anchoring of mechanical compression type packer is on internal surface of sleeve pipe, apply the packing element of certain the pressure of the drill compression packer 6, set packer 6, packer 6 tubing string while setting is subject to axial compressive force, hydrajet tool 4(selects mechanical type can close waterpower spray gun here) compress in the effect of this axial compressive force, open nozzle fluid hole, the inside and outside nozzle by hydrajet tool of tubing string is communicated with;
3) perforation: infusion load fluid in oil pipe 8, load fluid stream is formed at the nozzle of spray gun and takes sand jet at a high speed, penetrates out sleeve pipe, cementing concrete ring and stratum.During hydraulic jet perforation, the chock pressure difference produced when liquid stream flows through nozzle is less than the opening pressure of pressure reduction controlled circulation valve 5, now pressure differential cycles valve 5 fluid closed condition;
4) pressure break: after perforation terminates, infusion liquid in oil pipe 8, forces stratum crack initiation, after the crack initiation of stratum, injects fracturing fluid carry out pressing crack construction in oil pipe 8 with oil jacket annular space 9 huge discharge;
5) deblocking packer with pressure: after pressing crack construction, close annular preventer 2, fracture well head 1 and all gates of well head big four 3, lay down the connecting bolt between fracture well head 1 and annular preventer 2, tubing string is carried together with on fracture well head 1, deblocking packer 6, closes hydrajet tool 4; Now as follows with the well control state of oil jacket annular space in oil pipe: annular preventer 2 Seal Oil cover annular space 9, and oil jacket annular space 9 movable sealing can be realized.Derrick traveling system is carried together with on tubing string in well, now due to fracture well head 1 connected pipes 8, fluid course in oil pipe 8 is by the gate combined closing of fracture well head 2, liquid stream now in tubing string can not flow out, when fracture well head 1 is together with when tubing string in well is carried, the tubing string axial compressive force that packer 6 applies when setting disappears, spray gun again cuts out under the effect of reset itself spring simultaneously, close oil, cover liquid stream interface channel, it is inner that the liquid now in oil jacket annular space 9 can not enter oil pipe 8.When above carrying to certain altitude (being greater than the deblocking height of packer 6), packer 6 deblocking, transfers the flange face of well head to annular preventer 2, now can open the gate of fracture well head 1, if lost returns liquid in oil pipe, illustrated that down-hole mechanical can be closed spray gun and be closed.Now can carry out unloading well head, tubing string operation is moved in dragging with pressure.
Due to conventional oil pipe rising, lower brill time tubing string have the action of transferring, machinery can the unlatching compressive force of closing type spray gun much larger than the frictional force of mechanical compression type packer and casing wall, when dynamic tubing string, waterpower spray gun can not be opened.
6) dragging tubing string with pressure: do not have well control risk at the moment with oil jacket annular space 9 in oil pipe 8, now can carry out dragging tubing string with pressure operation, adjustment tubing string is to next design and construction position;
7) again set: after tubing string adjustment, well mouth oil pipe 8 is connected all closing gates of fracture well head 1(fracture well head 1 again), by put-on and delegated tubing string set packer 6, packer 6 machinery while setting can be opened by closing type spray gun, connect the connecting bolt of fracture well head and annular preventer, open annular preventer 2;
8) repeat perforation, pressure break: repeat step 3), 4), 5), 6), 7) until all construction location all pressure break complete.Testing seal about packer failure, pulls out of hole and changes tool string.
After in above-mentioned step 7), packer 6 has set again, infusion liquid in oil pipe 8, completed by measurement fluid pressure and envelope operation is tested to packer 6, if testing seal about packer did not lose efficacy, then continue next step construction operation, if testing seal about packer lost efficacy, then carried out construction operation again after needing trip-out to change tool string.
In tool string, be connected with pressure reduction controlled circulation valve 5, when mechanical compression type packer slip mechanism lost efficacy, namely tubing string can not grappling time, now tubing string does not have the strong point as fulcrum to compress tubing string, and then machinery can cannot be opened by closing type spray gun, tubing string is inside and outside carries out open flow or circulation kill-job in oil pipe without interface channel, and now lift pipe string exists risk.Now suppress high pressure in oil pipe, starting differential pressure controlled circulation valve 5, carries out open flow in circulation kill-job or tubing string, pulls out of hole and changes drilling tool.
This fracturing string of the present utility model and fracturing process, adopt conventional tubing transmission, packer packing is every construction layer, hydraulic jet perforation is carried out by hydraulic sand blasting, tie surface annular preventer combination fracturing tree belt pressure drags tubing string and realizes oil, the construction of gas well horizontal well contiguous segmentation volume fracturing, shortens the engineering time, improves efficiency of construction, reduces construction cost.
More than exemplifying is only illustrate of the present utility model, does not form the restriction to protection domain of the present utility model, everyly all belongs within protection domain of the present utility model with the same or analogous design of the utility model.
Claims (5)
1. based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure, comprise oil pipe (8), it is characterized in that: being connected with in turn on the horizontal segment of oil pipe (8) can closing type hydrajet tool (4), pressure reduction controlled circulation valve (5), packer (6) and righting-oriented device (7), described hydrajet tool (4), pressure reduction controlled circulation valve (5), connected mode between packer (6) and righting-oriented device (7) are screwed connection.
2. as claimed in claim 1 based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure, it is characterized in that: described hydrajet tool (4) can close waterpower spray gun for mechanical type.
3., as claimed in claim 1 based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure, it is characterized in that: described packer (6) is mechanical compression type packer.
4. as claimed in claim 1 based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure, it is characterized in that: described pressure reduction controlled circulation valve (5) comprises top connection (10), spool (11) and lower contact (12), the head of lower contact (12) is sleeved on the afterbody of top connection (10) and is fixed by stopping screw (13);
Spool (11) is positioned at top connection (10) and lower contact (12) is inner, and spool (11) and top connection (10), lower contact are provided with O RunddichtringO between (12);
The sidewall of top connection (10) and the sidewall cross-under of spool (11) have same shear pin (14), and the bottom near shear pin (14) on the sidewall of top connection (10) offers through hole (15).
5., as claimed in claim 4 based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure, it is characterized in that: described pressure reduction controlled circulation valve (5) is normally close valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420482761.0U CN204082115U (en) | 2014-08-26 | 2014-08-26 | Based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure |
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| CN201420482761.0U CN204082115U (en) | 2014-08-26 | 2014-08-26 | Based on the horizontal well volume fracturing tubing string of conventional oil pipe dragging with pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153753A (en) * | 2014-08-26 | 2014-11-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Horizontal well volume fracturing tubular column and method based on conventional oil tube pressure dragging |
| CN109751018A (en) * | 2017-11-01 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of construction method for normal pressure shale gas volume fracturing |
| CN111395964A (en) * | 2020-03-27 | 2020-07-10 | 中国石油大学(北京) | Horizontal section cave-making spray gun, tubular column and cave-making method for coal bed gas horizontal well |
-
2014
- 2014-08-26 CN CN201420482761.0U patent/CN204082115U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153753A (en) * | 2014-08-26 | 2014-11-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Horizontal well volume fracturing tubular column and method based on conventional oil tube pressure dragging |
| CN104153753B (en) * | 2014-08-26 | 2017-04-19 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Horizontal well volume fracturing tubular column and method based on conventional oil tube pressure dragging |
| CN109751018A (en) * | 2017-11-01 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of construction method for normal pressure shale gas volume fracturing |
| CN111395964A (en) * | 2020-03-27 | 2020-07-10 | 中国石油大学(北京) | Horizontal section cave-making spray gun, tubular column and cave-making method for coal bed gas horizontal well |
| CN111395964B (en) * | 2020-03-27 | 2021-03-23 | 中国石油大学(北京) | Horizontal section cave-making spray gun, tubular column and cave-making method for coal bed gas horizontal well |
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