CN104196492B - A kind of dragging down-hole plugging valve with pressure - Google Patents
A kind of dragging down-hole plugging valve with pressure Download PDFInfo
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- CN104196492B CN104196492B CN201410423295.3A CN201410423295A CN104196492B CN 104196492 B CN104196492 B CN 104196492B CN 201410423295 A CN201410423295 A CN 201410423295A CN 104196492 B CN104196492 B CN 104196492B
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Abstract
The present invention relates to oil gas field stimulation technology field, specifically provide a kind of dragging down-hole plugging valve with pressure, including the parts such as outer sleeve body, sliding sleeve, described sliding sleeve outer surface slip cap is connected to outer sleeve body, and outer sleeve body upper end is fixing with top connection to be connected；Outer sleeve body lower end is fixedly connected with the slip pressure head that can slide between sliding sleeve and stroke cylinder sleeve, and the lower end of stroke cylinder sleeve is fixing with lower contact to be connected；Between top connection and sliding sleeve upper end, it is provided with elastic force direction in plugging valve along the axial spring one of plugging valve, and is provided with elastic force direction between lower contact and slip pressure head along the axial spring two of plugging valve；Have nozzle on outer sleeve body, sliding sleeve has liquid outlet.This plugging valve overcomes horizontal well volume fracturing in prior art and has constructed and need after one layer open flow release strata pressure could drag tubing string, the supreme construction section in adjustment drilling tool position carry out constructing caused can not cause the problem that construction period is long, whole efficiency is the highest by dragging tubing string with pressure.
Description
Technical field
The present invention relates to oil gas field stimulation technology field, be one of underground operation tool important in petroleum-gas fiedl pressure break, acidizing treatment operation, a kind of dragging down-hole plugging valve with pressure.
Background technology
In recent years, the construction of the horizontal well volume fracturing such as Changqing oilfields is a large amount of uses " conventional tubing transmission, uses packer packing every construction layer, utilize hydraulic jet perforation, and oil jacket splits, and drags tubing string and realizes the most successively volume fracturing construction " with injection pressure.But by this process, constructed and needed open flow release strata pressure could drag tubing string after one layer, the supreme construction section in adjustment drilling tool position is constructed.Cause that construction period is long, whole efficiency is the highest.
The major alterations mode of Changqing oilfields extra-low-permeability reservoir changes to horizontal well volume fracturing process at present, and it is the direction that a kind of efficient reforming mode is just guiding following oil field development.Conventional levels well volume fracturing simultaneously uses single underseal to seal construction interval, oil jacket pumps into stratum with note, its huge discharge, big liquid measure, the feature of large sand amount require construct needs after one layer open flow backwash thoroughly to construct another interval by activity tubing string, period to reduce efficiency of construction through between the stopping times such as longer open flow.
In order to improve efficiency of construction, need in the case of not open flow, drag tubing string and adjust drilling tool position, dragging the most with pressure.The pattern of current dragging construction operation with pressure mainly has two kinds:
One, use coiled tubing to carry out dragging construction operation with pressure: continuous oil pipe device relies on advanced foreign technology support the most mostly, and the main equipment such as Operation Tubing Aggregate is difficult to drive into well site long celebrating on the mountain roads such as block.
Two, conventional oil pipe is used to carry out dragging construction operation with pressure: to apply special calker in wellhead blowout preventer and oil pipe, realize the closure in oil jacket annular space and oil pipe, carry out adjustment drilling tool with pressure, but use the method to need from well head input, salvage blanking plug, complex procedures, efficiency is low.
In order to realize quick dragging with pressure, need a kind of Operating Pressure down-hole plugging valve of design so that it is realize, with the use of wellhead blowout preventer, the horizontal well contiguous segmentation volume fracturing that conventional oil pipe racks pressure drags.
Summary of the invention
It is an object of the invention to overcome horizontal well volume fracturing in prior art to construct after one layer needs open flow release strata pressure could drag tubing string, the supreme construction section in adjustment drilling tool position carry out constructing caused can not cause the problem that construction period is long, whole efficiency is the highest by dragging tubing string with pressure.
For this, the invention provides a kind of dragging down-hole plugging valve with pressure, including top connection, spring one, spring two, outer sleeve body, nozzle, sliding sleeve, slip pressure head, stroke steel bushing and lower contact, sliding sleeve outer surface slip cap is connected to outer sleeve body, threadeds with top connection in outer sleeve body upper end；Outer sleeve body lower end is threaded connection the slip pressure head that can slide between sliding sleeve and stroke cylinder sleeve, threadeds with lower contact in the lower end of stroke cylinder sleeve；Between top connection and sliding sleeve upper end, it is provided with elastic force direction in plugging valve along the axial spring one of plugging valve, and is provided with elastic force direction between lower contact and slip pressure head along the axial spring two of plugging valve；Having nozzle on outer sleeve body, sliding sleeve has liquid outlet, when nozzle and liquid outlet are staggered like state, plugging valve is closed, and when nozzle and liquid outlet are identical state, plugging valve is in opening.
The outer surface of above-mentioned sliding sleeve upper end is provided with along the axial chute of plugging valve, and the upper end of outer sleeve body is fixed with the slide block that can slide in chute.
Multiple-sealed circle it is provided with between above-mentioned outer sleeve body and sliding sleeve.
The junction of above-mentioned top connection and the junction of outer sleeve body, slip pressure head and outer sleeve body is equipped with sealing ring and screw is buckled in anti-back.
Above-mentioned stroke steel bushing is provided with anti-back button screw with the junction of lower contact.
Beneficial effects of the present invention: the present invention is directed to conventional oil pipe racks pressure and drag the dragging down-hole plugging valve this with pressure of construction operation design, it is that a kind of machinery can repeat plugging valve by closing type, its indoor design has slider mechanism, spring, slide block mechanism, can ensure that plugging valve realizes repeatedly open and close exactly.This plugging valve coordinates packer at the bottom of compression to carry out construction operation, well head uses annular preventer to seal oil jacket annular space, when applying certain the pressure of the drill set packer, spring in compression plugging valve, outer sleeve body and sliding sleeve is promoted to produce relative displacement, after reaching certain stroke, the liquid outlet on sliding sleeve matches with the nozzle on plugging valve outer sleeve body thus opens plugging valve liquid outlet, and stratum is carried out perforation, sand fracturing.Construct rear upper lifting pipe post, removing seal for packer, plugging valve is closed simultaneously, oil pipe no longer connects with oil jacket annular space, and annulus fluid is blocked by the annular preventer at well head, now instrument can be dragged to lift pipe string next construction interval without open flow, the pressure on stratum will not enter oil pipe and produce overflow or blowout.Can construct next section with set packer the most again, save the time that open flow etc. stops in the middle of this, substantially increase work efficiency.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1, plugging valve closed mode overall structure schematic diagram；
Fig. 2, plugging valve opening overall structure schematic diagram；
Nozzle and press the close-up schematic view near slippery fellow under Fig. 3, plugging valve closed mode；
Nozzle and press the close-up schematic view near slippery fellow under Fig. 4, plugging valve opening；
Fig. 5, tubular column structure and wellhead blowout preventer schematic diagram.
Description of reference numerals: 1, top connection；2, spring one；3, slide block；4, outer sleeve body；5, nozzle；6, sliding sleeve；7, slip pressure head；8, stroke steel bushing；9, spring two；10, lower contact；11, liquid outlet；12, chute；13, O RunddichtringO；14, fracture well head；15, annular preventer；16, well head big four；17, down-hole plugging valve；18, pressure reduction controls circulating valve；19, mechanical packer；20, righting-oriented device；21, oil pipe；22, casing annulus.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, the invention provides a kind of dragging down-hole plugging valve with pressure, including top connection 1, spring 1, spring 29, outer sleeve body 4, nozzle 5, sliding sleeve 6, slip pressure head 7, stroke steel bushing 8 and lower contact 10, sliding sleeve 6 outer surface slip cap is connected to outer sleeve body 4, threadeds with top connection 1 in outer sleeve body 4 upper end；Outer sleeve body 4 lower end is threaded connection the slip pressure head 7 that can slide between sliding sleeve 6 and stroke cylinder sleeve 8, threadeds with lower contact 10 in the lower end of described stroke cylinder sleeve 8；Between top connection 1 and sliding sleeve 6 upper end, it is provided with elastic force direction in plugging valve along the axial spring 1 of plugging valve, and is provided with elastic force direction between lower contact 10 and slip pressure head 7 along the axial spring 29 of plugging valve；Having nozzle 5 on described outer sleeve body 4, sliding sleeve has liquid outlet 11, when nozzle 5 and liquid outlet 11 are staggered like state, plugging valve is closed, partial enlarged drawing the most as shown in Figure 3.When nozzle 5 and liquid outlet 11 are in identical state, plugging valve is in opening, as shown in Figure 2.
Embodiment 2
On the basis of embodiment 1, the outer surface of described sliding sleeve 6 upper end is provided with along the axial chute 12 of plugging valve, and the upper end of described outer sleeve body 4 is fixed with the slide block 3 that can slide in chute 12.Being provided with multiple-sealed circle between described outer sleeve body 4 and sliding sleeve 6, multiple-sealed circle can guarantee that have good sealing effectiveness in the case of movable sealing all the time.Top connection 1 and the junction of outer sleeve body 4, the junction of slip pressure head 7 and outer sleeve body 4 is equipped with sealing ring and screw is buckled in anti-back, and sealing ring forms sealing function, anti-back is buckled screw and played and prevent screw thread from moving back the effect buckled.Described stroke steel bushing 8 also is provided with anti-back button screw with the junction of lower contact 10, but does not has sealing ring, and anti-back button screw prevents from screw thread from moving back buckleing, which ensure that plugging valve close after its sealing property on the whole and bonding strength.The Jian Kuai mechanism of design on this plugging valve sliding sleeve 6, i.e. slide block and the assembly of chute, its liquid outlet that can ensure that on sliding sleeve 6 all the time can be the most corresponding with the nozzle on outer sleeve body 4.Described Jian Kuai mechanism concrete structure is: one end of slide block is put in inside chute, and outer sleeve body 4 has the osculum of fixing slide block 3, and slide block 3 is withstood in the opening on outer sleeve body 4 by step surface in top connection 1 all the time.When compressing plugging valve; top connection 1 promotes slide block 3 to slide together in chute; slide block 3 is fixed relative to top connection 1 and outer sleeve body 4; during sliding; slide block 3 can ensure that sliding sleeve 6 relative to outer sleeve body 4 without axial rotation; when the most each plugging valve fully opens, sliding sleeve 6 upper liquid outlet can completely corresponding with the nozzle on outer sleeve body 4 coincide, and plugging valve liquid outlet size is not produced impact.
The concrete principle of the present invention and work process: be designed with slider mechanism in this plugging valve to realize the open and close of plugging valve.When this plugging valve in use, sliding sleeve 6 can slide in plugging valve outer sleeve body 4, liquid outlet 11 it is drilled with on sliding sleeve 6, when sliding sleeve 6 slides into one end, liquid outlet on sliding sleeve 6 is just corresponding with the nozzle 5 on outer sleeve body 4 to coincide, then plugging valve is in fully opened, when sliding sleeve 6 slides to the other end, nozzle and liquid outlet relative misalignment, then plugging valve is in the completely closed state；Back-moving spring 1 and spring 29 it is also devised with in plugging valve two ends, two springs are compression spring, certain precompression is had after installing, relying on the elastic force of spring that the liquid outlet 11 of sliding sleeve 6 is mutually staggered with the nozzle 5 on outer sleeve body 4 during free state or dragging tubing string, plugging valve is closed；When applying certain force to plugging valve two ends when, plugging valve can be opened, and when discharging this power, plugging valve then can be closed.Two ends top connection 1 at plugging valve applies certain power with lower contact 10, spring 1 and spring 29 can be compressed, slip pressure head 7 can slide in stroke steel bushing 8 simultaneously, plugging valve outer sleeve body 4 is driven to slide relative to sliding sleeve 6 together, when pressure reaches certain value, slip pressure head 7 slide put in place, sliding sleeve 6 liquid outlet with the nozzle of outer sleeve body 4 completely to upper, plugging valve liquid outlet channel is opened, the most as shown in Figure 4.After this pressure that release applies, at spring 1 and spring 29 under its restoring force effect, can produce again reverse relative slip between plugging valve outer sleeve body 4 with sliding sleeve 6, the liquid outlet on sliding sleeve 6 mutually staggers until plugging valve liquid outlet channel completely closes with the nozzle 5 on outer sleeve body 4；Owing to being designed with Jian Kuai mechanism on plugging valve sliding sleeve 6, it is ensured that the liquid outlet on sliding sleeve 6 all the time can be the most corresponding with the nozzle on outer sleeve body 4.This Jian Kuai mechanism is: sliding sleeve one end is milled with the chute of similar keyway; put slide block 3 inside; when compressing plugging valve; top connection 1 promotes slide block 3 to move together in chute; slide block 3 is fixed relative to top connection 1 and outer sleeve body 4, during sliding, slide block 3 can ensure that sliding sleeve 6 relative to outer sleeve body 4 without axial rotation; when the most each plugging valve fully opens, sliding sleeve 6 upper liquid outlet 11 can the most corresponding with the nozzle 5 on outer sleeve body 4 coincide, and plugging valve liquid outlet size is not produced impact.
To sum up, the present invention is directed to conventional oil pipe racks pressure and drag the dragging down-hole plugging valve this with pressure of construction operation design, it is that a kind of machinery can repeat plugging valve by closing type, and its indoor design has slider mechanism, spring, slide block mechanism, can ensure that plugging valve realizes repeatedly open and close exactly.This plugging valve coordinates packer at the bottom of compression to carry out construction operation, well head uses annular preventer to seal oil jacket annular space, when applying certain the pressure of the drill set packer, spring in compression plugging valve, outer sleeve body and sliding sleeve is promoted to produce relative displacement, after reaching certain stroke, the liquid outlet on sliding sleeve matches with the nozzle on plugging valve outer sleeve body thus opens plugging valve liquid outlet, and stratum is carried out perforation, sand fracturing.Construct rear upper lifting pipe post, removing seal for packer, plugging valve is closed simultaneously, oil pipe no longer connects with oil jacket annular space, and annulus fluid is blocked by the annular preventer at well head, now instrument can be dragged to lift pipe string next construction interval without open flow, the pressure on stratum will not enter oil pipe and produce overflow or blowout.Can construct next section with set packer the most again, save the time that open flow etc. stops in the middle of this, substantially increase work efficiency.
Application example below in conjunction with dragging down-hole plugging valve with pressure is illustrated by:
As it is shown in figure 5, each several part is respectively as follows: fracture well head 14, annular preventer 15, well head big four 16, down-hole plugging valve 17, pressure reduction control circulating valve 18, mechanical packer 19, righting-oriented device 20, oil pipe 21 and casing annulus 22 in figure.
Underground work process is as follows:
(1) bore under: bore under fastening means string.During lower brill, spring one (2) and the spring two (9) of down-hole plugging valve have certain pretightning force, and its size be enough to overcome plugging valve with the frictional force between lower tubular column and casing wall, and in going down process, plugging valve is closed；
(2) set packer instrument: transfer to design attitude until tool string, set mechanical packer.Meanwhile, tubing string is by axial compression stress while setting for mechanical packer, and down-hole plugging valve compresses under the effect of this axial compressive force, opens nozzle liquid outlet, and the inside and outside nozzle by hydrajet tool of tubing string connects；
(3) hydraulic jet perforation operation: infusion load fluid in oil pipe, load fluid stream takes sand jet, when penetrating out sleeve pipe, cementing concrete ring and stratum hydraulic jet perforation at a high speed in the nozzle formation of down-hole plugging valve；
(4) formation fracturing test: after perforation terminates, closes pipe box gate, infusion liquid in oil pipe, forces stratum crack initiation；
(5) pressure break: after formation fracturing test success, injects carry out pressing crack construction with oil jacket annular space huge discharge in oil pipe；
(6) with pressure dragging adjusts drilling tool: after pressing crack construction, closes annular preventer, closes all shaft collars, lay down the connecting bolt between fracture well head and annular preventer, together with fracture well head upper lifting pipe post.Now interior and oil jacket annular space the well control state of oil pipe is as follows:
One, oil jacket annular one's intention as revealed in what one says danger: annular preventer Seal Oil set annular space, and movable sealing can be realized；
Two, well head risk in oil pipe:
Derrick traveling system is together with carrying fracture well head on tubing string in well, now due to fracture well head connected pipes, the fluid course in oil pipe is by the gate combined closing of fracture well head, and now the liquid stream in tubing string will not flow out.When carrying on tubing string in fracture well head is together with well, the tubing string axial compressive force that packer applies when setting disappears, and down-hole plugging valve is re-closing off under the effect of reset itself spring simultaneously, closes oil, set liquid stream interface channel.Now the liquid in oil jacket annular space can not enter inside oil pipe.When above carrying to certain altitude (more than the deblocking height of packer), removing seal for packer, transfer well head to annular preventer flange face, now can opening the gate of fracture well head, if loseing returns liquid in oil pipe, illustrating that down-hole mechanical can be closed spray gun and is turned off.Now can carry out unloading well head, tubing string operation is moved in dragging with pressure.
Due to conventional oil pipe rising, lower bore time tubing string have the action transferred, the unlatchings compression stress of down-hole plugging valve is much larger than packer and the frictional force of casing wall, and dynamic tubing string when, waterpower spray gun will not be opened.Now, in oil pipe, do not have well control risk with oil jacket annular space, now can carry out dragging tubing string operation with pressure, adjust the supreme construction section of tubing string；
(7) again set: after tubing string adjusts, well mouth oil pipe connects fracture well head (all closing gates of fracture well head), by put-on and delegated tubing string set packer, packer down-hole plugging valve while setting is opened, and connects the connecting bolt of fracture well head and annular preventer；
(8) testing seal about packer: after packer setting, in oil pipe, envelope operation tested by packer by infusion liquid；
(9) perforation, pressure break: repetition step (3), (4), (5), (6), (7), until testing seal about packer failure, pull out of hole and change tool string.
The part that the present embodiment describes the most in detail belongs to the known conventional means of the industry, describes the most one by one.Exemplified as above is only the illustration to the present invention, is not intended that the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention belongs to protection scope of the present invention.
Claims (6)
1. a dragging down-hole plugging valve with pressure, including top connection (1), spring one (2), spring two (9), outer sleeve body (4), nozzle (5), sliding sleeve (6), slip pressure head (7), stroke cylinder sleeve (8) and lower contact (10), it is characterized in that: described sliding sleeve (6) outer surface slip cap is connected to outer sleeve body (4), threadeds with top connection (1) in outer sleeve body (4) upper end；Outer sleeve body (4) lower end is threaded connection the slip pressure head (7) that can slide between sliding sleeve (6) and stroke cylinder sleeve (8), threadeds with lower contact (10) in the lower end of described stroke cylinder sleeve (8)；It is positioned in plugging valve between top connection (1) and sliding sleeve (6) upper end and is provided with elastic force direction along the axial spring one (2) of plugging valve, and be provided with elastic force direction between lower contact (10) and slip pressure head (7) along the axial spring two (9) of plugging valve；Nozzle (5) is had on described outer sleeve body (4), having liquid outlet (11) on sliding sleeve, when nozzle (5) and liquid outlet (11) are staggered like state, plugging valve is closed, when nozzle (5) and liquid outlet (11) are in identical state, plugging valve is in opening.
A kind of dragging down-hole plugging valve with pressure the most as claimed in claim 1, it is characterized in that: the outer surface of described sliding sleeve (6) upper end is provided with along the axial chute (12) of plugging valve, and the upper end of described outer sleeve body (4) is fixed with the slide block (3) that can slide in chute (12).
A kind of dragging down-hole plugging valve with pressure the most as claimed in claim 1, it is characterised in that: it is provided with multiple-sealed circle between described outer sleeve body (4) and sliding sleeve (6).
A kind of dragging down-hole plugging valve with pressure the most as claimed in claim 1, it is characterised in that: the junction of top connection (1) and outer sleeve body (4) is provided with sealing ring and screw is buckled in anti-back.
A kind of dragging down-hole plugging valve with pressure the most as claimed in claim 1, it is characterised in that: the junction of slip pressure head (7) and outer sleeve body (4) is provided with sealing ring and screw is buckled in anti-back.
A kind of dragging down-hole plugging valve with pressure the most as claimed in claim 1, it is characterised in that: described stroke cylinder sleeve (8) is provided with anti-back button screw with the junction of lower contact (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410423295.3A CN104196492B (en) | 2014-08-26 | 2014-08-26 | A kind of dragging down-hole plugging valve with pressure |
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| CN201410423295.3A CN104196492B (en) | 2014-08-26 | 2014-08-26 | A kind of dragging down-hole plugging valve with pressure |
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| CN104196492B true CN104196492B (en) | 2016-08-17 |
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Families Citing this family (5)
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| CN107366522B (en) * | 2017-08-01 | 2023-08-18 | 中国石油天然气集团有限公司 | Sliding sleeve opening tool with variable length and sleeve sliding sleeve thereof |
| CN109339725B (en) * | 2018-11-05 | 2021-11-02 | 中国海洋石油总公司 | Releasing device |
| CA3104454A1 (en) * | 2019-01-24 | 2020-07-30 | The Wellboss Company, Inc. | Downhole sleeve tool |
| CN110500084A (en) * | 2019-08-30 | 2019-11-26 | 中国石油集团川庆钻探工程有限公司 | A kind of formation testing completion integral method |
| CN117684941A (en) * | 2024-02-02 | 2024-03-12 | 新疆石油管理局有限公司 | Double-seal repeated transformation device and method for horizontal well with pressurized combined tubular column |
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