CN204266988U - A kind of pilot-controlled switch sliding sleeve - Google Patents

A kind of pilot-controlled switch sliding sleeve Download PDF

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Publication number
CN204266988U
CN204266988U CN201420451659.4U CN201420451659U CN204266988U CN 204266988 U CN204266988 U CN 204266988U CN 201420451659 U CN201420451659 U CN 201420451659U CN 204266988 U CN204266988 U CN 204266988U
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China
Prior art keywords
sliding sleeve
piston
pilot
controlled switch
hydraulic
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CN201420451659.4U
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Inventor
段友智
侯倩
何祖清
岳慧
王玉娟
孔博
邓继文
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
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Abstract

The utility model provides a kind of pilot-controlled switch sliding sleeve, belongs to the completion field of Oil/gas Well.This device comprises hydraulic power executing agency, hydraulic control is injected and output mechanism, fluid flow controlling organization; Hydraulic power executing agency comprises upper bush, lower sleeve and is positioned at piston end cap between the two, and the inner space of three forms piston/cylinder, and piston can move back and forth vertically in described piston/cylinder; Piston is connected with piston rod; The hydraulic line that described hydraulic control is injected and output mechanism comprises two input adapters and is connected with this input adapter, two input adapters lay respectively on described upper bush and cover with described piston end; Described fluid flow controlling organization comprises the inner sliding sleeve be positioned at below piston end cap and the outer sliding sleeve be enclosed within outside inner sliding sleeve, and outer sliding sleeve is connected with described piston rod; Described inner sliding sleeve has at least one throttle orifice; When outer sliding sleeve moves back and forth in the axial direction with piston, the throttle orifice on inner sliding sleeve can be opened or closed.

Description

A kind of pilot-controlled switch sliding sleeve
Technical field
The utility model belongs to the completion field of Oil/gas Well, is specifically related to a kind of pilot-controlled switch sliding sleeve, realizes motionless flow string control downhole fluid production and injection from well head for horizontal well, many productive series well and multilateral well.
Background technology
Downhole fluid control tool is the control tool that downhole fluid is produced and injected, and comprises switching sliding sleeve (control valve), multidigit throttling sliding (control valve) etc.This instrument may be used for subsection water injection, staged fracturing and subsection acidizing etc., closes high aquifer formation and carries out controlling aquatic product.By reasonably configuring the Liquid output of each segmentation, controlling water gas coning, delaying the oil well water breakthrough gas time, improve the overall efficiency of oil well.Downhole fluid control valve and packer with the use of, horizontal well horizontal segment or multiple-limb packing segmentation are closed and adopts, overcome the uncertainty of reservoir modeling and look for the unfavorable factors such as water blockoff difficulty is large, the production of different interval is adjusted in real time by ground, and the well stimulations such as repetition de-plugging, pressure break can be carried out when not taking work measure, thus increase substantially exploitation rate and the ultimate recovery of oil-gas reservoir.
Current downhole fluid control tool may be used for subsection water injection, staged fracturing and subsection acidizing etc., close high aquifer formation to carry out controlling aquatic product, namely control the instrument of downhole production and injection fluid, comprise switching sliding sleeve (control valve), multidigit throttling sliding (control valve) etc., and the throttling nozzle type of ground prefabricated, throat type fluid control device etc.The object of above-mentioned downhole tool is the Liquid output by reasonably configuring each segmentation, controls water gas coning, delays the oil well water breakthrough gas time, improves the overall efficiency of oil well.Downhole fluid control valve and packer with the use of, horizontal well horizontal segment or multiple-limb packing segmentation are closed and adopts, overcome the uncertainty of reservoir modeling and look for the unfavorable factors such as water blockoff difficulty is large, the production of different interval is adjusted in real time by ground, and the well stimulations such as repetition de-plugging, pressure break can be carried out when not taking work measure, thus increase substantially exploitation rate and the ultimate recovery of oil-gas reservoir.
After Oil/gas Well carries out multiple-limb and horizontal well in segments completion by switching sliding sleeve, in process of production, carry out opening or closing operation from measures such as traditional wire rope launch-work switch or coiled tubing switching operations at the switching sliding sleeve of down-hole, utilize corresponding seating nipple to implement operation, the Internal periphery of seating nipple and the outline of shifting tool match.Mechanical sliding sleeve is simple, cheap, but needs mechanism and carry out action, namely must in well lower cable or coiled tubing, or open by upper and lower jarring, close.Steel wire launch-work sliding sleeve, by wire rope operation, can be avoided tripping out and flow string under lower going-into-well, but still need to carry out underground work.
Control valve for fluids mainly contains on/off-type and throttle-type two class.Wherein, the ON/OFF sliding sleeve of on/off-type control valve for fluids can only in standard-sized sheet or closed positions work.Usually close formation fluid because economic cause is applied to or closes exhausted stratum or the too many stratum of aquifer yield; At multilayered reservoir well, be applied to regulation and control certain layer and produce or close certain layer.Current switching sliding sleeve open and closing control mode mainly comprises Electric control and hydraulic control mode, wherein hydraulic control mode have control reliably, by well depth restriction and the advantage such as control moment is large.
Utility model content
The purpose of this utility model is to solve the difficult problem existed in above-mentioned prior art, a kind of pilot-controlled switch sliding sleeve is provided, on the one hand, fixed tubular column and when not stopping production, realize the real-time control to downhole production fluid, realize controlling Ge Jingduan stratum, down-hole production fluid, close high aquifer formation to carry out controlling aquatic product, effective alleviation oil reservoir pneumatic jack or edge and basal water, reduce water ratio in oil well, overcome because the non-homogeneity of oil-gas reservoir and exhausted oil-gas Layer are to the adverse effect of this Oil/gas Well overall yield; On the other hand, the fluid that can realize the well stimulations such as subsection water injection, staged fracturing and subsection acidizing de-plugging injects and controls.By development pilot-controlled switch sliding sleeve, other completion tool supporting, adjust the production of different interval in real time by ground and repeat well stimulation, reduce lower tubular column and repeated the work measure such as completion, reduce and close down well number of times and time, thus significantly reduce operation and producing cost, improve the monocrystalline output of Oil/gas Well, thus increase substantially exploitation rate and the ultimate recovery of oil-gas reservoir.
The utility model is achieved through the following technical solutions:
A kind of pilot-controlled switch sliding sleeve, comprises hydraulic power executing agency, hydraulic control is injected and output mechanism, fluid flow controlling organization;
Described hydraulic power executing agency comprises upper bush, lower sleeve and is positioned at piston end cap between the two, and the inner space of three forms piston/cylinder, and piston can move back and forth vertically in described piston/cylinder; Piston is connected with piston rod;
The hydraulic line that described hydraulic control is injected and output mechanism comprises two input adapters and is connected with this input adapter, two input adapters lay respectively on described upper bush and cover with described piston end;
Described fluid flow controlling organization comprises the inner sliding sleeve be positioned at below piston end cap and the outer sliding sleeve be enclosed within outside inner sliding sleeve, and outer sliding sleeve is connected with described piston rod;
Described inner sliding sleeve has at least one throttle orifice; When outer sliding sleeve moves back and forth in the axial direction with piston, the throttle orifice on inner sliding sleeve can be opened or closed.
When described inner sliding sleeve having 2 and above throttle orifice, throttle orifice is axially uniformly distributed along inner sliding sleeve, also can adopt other arrangement mode.
Described outer sliding sleeve is connected with described piston end cap by described lower sleeve, is provided with O type circle between outer sliding sleeve and lower sleeve.
Described input adapter is 1/4 " NPT or card sheath button.
Described hydraulic line is controlled by the gauge tap on ground, and the hydraulic line be connected with piston end cap, piston/cylinder, the hydraulic line be connected with upper bush form U-shaped connection.
The connector position of described hydraulic line has draw-in groove, mutually clamps with the clip on input adapter.
Piston is provided with O type circle, to ensure the sealing between piston and piston/cylinder;
Cover at piston end and be provided with O type circle, to ensure the sealing between piston end cap and piston;
O type circle is provided with between outer sliding sleeve and lower sleeve.
Be connected with lower contact below described inner sliding sleeve, be provided with O type circle between.
Described upper bush is connected with top connection.
Compared with prior art, the beneficial effects of the utility model are:
Control valve for fluids is the core tool of downhole fluid control system, and at the circumstance complication of underground work, the needs of carry out recovering the oil, control according to fixed tubular column after the sectional well completion measures such as water, water filling and acidifying, must make this instrument simple and reliable as far as possible.Control valve for fluids has 2 inlet openings in the end of upper cylinder body, one is that control valve opens inlet opening, another is the public inlet opening that control valve is closed, and " metal sealing joint such as NPT joint or ferrule fitting connects, easy to connect, reliable, be convenient to site operation by 1/4.Reciprocating motion of the pistons is promoted by the injection back and forth of piston two ends hydraulic pressure, connecting rod simultaneously by connecting outer sliding sleeve drives outer sliding sleeve to realize being communicated with of hydraulic pressure hole and the instrument external world and airtight, realize opening and closing of switching sliding sleeve, hydraulic pressure transfer moment is large, overcome the complex situations such as downhole scaling and corrosion, manipulation safely, reliably.
This pilot-controlled switch sliding sleeve, when using pilot-controlled switch sliding sleeve to carry out segmentation exploitation to oil well, design can be optimized in conjunction with reservoir numerical simulation result to the perforate size of throttle orifice on pilot-controlled switch sliding sleeve, the chock pressure difference of every interval can be optimized, thus adjustment horizontal well production profile.
Produce and inject orifice size and the chock pressure difference in flow restriction hole, can be optimized according to the reservoir modeling result of concrete producing well, can be made up of single hole, also can be made up of porous, the object of porous is when reducing or avoid single hole throttle, and downhole production or injection fluid are to the local erosion of throttle orifice.
By development pilot-controlled switch sliding sleeve, other completion tool supporting, adjust the production of different interval in real time by ground and repeat well stimulation, reduce lower tubular column and repeated the work measure such as completion, reduce and close down well number of times and time, thus significantly reduce operation and producing cost, improve the monocrystalline output of Oil/gas Well, thus increase substantially exploitation rate and the ultimate recovery of oil-gas reservoir.
Petroleum exploration in China exploitation is through the development in more than 50 years, and oil field, various places enters mid-later development phase all, moisturely significantly rises, and interlayer contradiction is aggravated, and development effectiveness worse and worse.In order to increase yield, realize water and oil control, progressively promoted zonal water plugging, the technological measures such as Production through Water Plugging are looked in sectional well completion segmentation, to improve waterflooding development effect.In layering, segmentation oil production technology are produced, its key technology is exactly separate the downhole flow by-pass valve control switch of each layer.By development pilot-controlled switch sliding sleeve, other completion tool supporting, adjust the production of different interval in real time by ground and repeat well stimulation, reduce lower tubular column and repeated the work measure such as completion, reduce and close down well number of times and time, thus significantly reduce operation and producing cost, improve the well yield of Oil/gas Well, domestic and international conventional sandstone oil-gas reservoir, offshore oil gas reservoir, carbonate and fine and close oil gas etc. can be widely used in, exploitation rate and the ultimate recovery of oil-gas reservoir can be increased substantially.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
1, lower contact, 2, O type circle, 3, inner sliding sleeve, 4, throttle orifice, 5, outer sliding sleeve, 6, lower sleeve, 7, O type circle, 8, piston rod, 9, O type circle, 10, piston end cap, 11, O type circle, 12, piston, 13 upper bushes.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Underground switch slide bushing or control valve for fluids are the advanced technologies realizing individual well high yield, improve recovery ratio, Efficient Development oil gas field.The utility model is mainly in order to meet the demand of oil field at home exploration and development, development one can in well head or Long-distance Control, structure and simple to operate, that cost is low, reliability is high switching sliding sleeve (control valve for fluids), thus the completion tool that realization is produced at motionless downhole production tubing string, in real time ACTIVE CONTROL downhole fluid and injected, can be used for oil well segmentation extraction, segmentation is injected, stepping controlled switching sliding sleeve.
As shown in Figure 1, the structure composition of pilot-controlled switch sliding sleeve of the present utility model mainly comprises hydraulic power executing agency, downhole production or injects flow control mechanism, hydraulic control injection and output mechanism three parts, and top connection 13, lower contact 1 are connected by tubing thread with top and bottom flow string respectively.The summary of the invention such as each mechanism composition and function are as described below:
Hydraulic power executing agency: form piston/cylinder by top inner sliding sleeve 3, outer sliding sleeve 5 and piston 12, the hydraulic-driven that piston 12 is injected by two ends in piston/cylinder can move back and forth in the axial direction;
Hydraulic control is injected and output mechanism: primarily of 1 on control valve for fluids upper bush 13 1/4 " on NPT (or card sheath button) interface and piston end cap 10 1/4 " NPT (or card sheath button) interface, and " steel hydraulic line forms to connect 1/4 with corresponding connection button-type respectively.
Fluid flow controlling organization: primarily of perforate and fixing inner sliding sleeve 3 (inner sliding sleeve 3 is connected with lower contact 1) and can forming (being that hole axle coordinates between interior outer sliding sleeve) by outer sliding sleeve 5 in axial sliding, by hydraulic power executing agency drive link together piston 12, piston rod 8 and with outer sliding sleeve 5 (piston rod 8 and outer sliding sleeve 5 directly link and connect), realize in the axial direction moving up and down, realize opening or closing of the different opening of Valve with sliding bush.
By hydraulic line by hydraulic power sources such as hydraulic pumps to injecting liquid in piston/cylinder, realize the control to piston 12 in sliding sleeve controlling organization, piston rod 8 and outer sliding sleeve 5 is driven to move up and down, thus realize inner sliding sleeve 3 different opening and (control according to piston stroke, open and close and be parked in the upper bottom dead centre of plunger shaft respectively) control, finally realize the control of fluid flow;
The orifice size of the throttle orifice 4 of production and injection fluid and chock pressure difference, can be optimized according to the reservoir modeling result of concrete producing well, can be made up of single hole, also can be made up of porous, the object of porous is when reducing or avoid single hole throttle, and downhole production or injection fluid are to the local erosion of throttle orifice.
By two hydraulic lines and the piston end cap 10 (1# interface) of pilot-controlled switch sliding sleeve, 1/4 of upper bush 13 (2# interface) " NPT (or card sheath button) interface is connected 1# and 2# hydraulic line; hydraulic line is connected to ground, installs gauge tap respectively; Thus, namely the plunger shaft of 1# hydraulic line, switching sliding sleeve and 2# hydraulic line form U-shaped connection;
(1) when needing to open switching sliding sleeve, 1# and 2# hydraulic line switch is opened on ground, control liquid to be pumped into by 1# hydraulic line by ground hydraulic pump, plunger shaft lower end is entered from the piston end cap 10 of switching sliding sleeve, promote piston axially upwardly to move, drive piston rod 8 and outer sliding sleeve 5 axially upwardly to move, the throttle orifice 4 on inner sliding sleeve 3 is communicated with tool exterior, close 1# hydraulic line floor switches, stay open position to make throttle orifice 4;
(2) when needing closing switch sliding sleeve, 1# hydraulic line switch is opened on ground, control liquid to be pumped into from 2# hydraulic line by hydraulic pump, plunger shaft upper end is entered from upper bush 13 hydraulic joint of switching sliding sleeve, promote piston 12 axially-movable downwards, drive piston rod 8 and outer sliding sleeve 5 axially-movable downwards, the throttle orifice 4 on inner sliding sleeve 3 was closed with being communicated with of tool exterior, close the switch that 2# hydraulic line is positioned at ground, keep throttle orifice position to remain on closed condition.
When connecting hydraulic control lines, hydraulic control lines connector position is made into several draw-in groove and clamps for clip.Connect hydraulic control lines 1/4 " NPT joint carries hydraulic line clip and hydraulic line clamps and seals by sealing ring.In addition, piston 12 is provided with O type circle 11, to ensure the sealing between piston and cylinder body, between piston end cap 10 and piston 12, is provided with O type circle 9, between inner sliding sleeve 3 and lower contact 1, is provided with O type circle 2, between outer sliding sleeve 5 and lower sleeve 6, be provided with O type circle 7.
For in multilateral well and horizontal well development, produce full well water that the reason such as pressure drop funnel causes the factor such as horizontal well bottom water coning, the moisture rising of Multilateral Wells Zhong Dan branch to cause during non-homogeneity and exploitation due to reservoir and the unfavorable factor affecting Oil/gas Well output such as to flood.The present invention have developed a kind of hydraulic switch sliding bush, this switching sliding sleeve be by with the kits such as interval packing with the use of, sectional well completion is carried out to horizontal well in segments or multilateral well, pilot-controlled switch slides over each segmented layer position, prefabricated throttle orifice orifice size can be carried out according to reservoir modeling result, to produce different chock pressure differences at each interval, adjustment industry section, the balanced discharge opeing realizing producing well is produced.Meanwhile, also can any interval of horizontal well and multilateral well be in High water cut produce or exhausted time, the pass well operations of this interval can be carried out at ground fixed tubular column.In addition, this pilot-controlled switch sliding sleeve can also, when not carrying out removing flow string, realize carrying out the well stimulations such as repeated pressure break, acid fracturing, water filling and transfer drive to any interval or well.This switching sliding sleeve mainly comprises, the driving mechanism of upper bush, piston inner cylinder body, piston rod and piston composition, the downhole fluid controlling organization of inner sliding sleeve, outer sliding sleeve and throttle orifice composition, by hydraulic channel from diverse location injection liquid pressure, realize the axially-movable of driving mechanism, carry fluid controlling organization realizes the switch of switching sliding sleeve.By development pilot-controlled switch sliding sleeve, other completion tool supporting, adjust the production of different interval in real time by ground and repeat well stimulation, reduce lower tubular column and repeated the work measure such as completion, reduce and close down well number of times and time, thus significantly reduce operation and producing cost, improve the monocrystalline output of Oil/gas Well, thus increase substantially exploitation rate and the ultimate recovery of oil-gas reservoir.
Technique scheme is a kind of embodiment of the present utility model, for those skilled in the art, on the basis that the utility model discloses principle, be easy to make various types of improvement or distortion, and the structure be not limited only to described by the above-mentioned specific embodiment of the utility model, therefore previously described just preferred, and not there is restrictive meaning.

Claims (9)

1. a pilot-controlled switch sliding sleeve, is characterized in that: described pilot-controlled switch sliding sleeve comprises hydraulic power executing agency, hydraulic control is injected and output mechanism, fluid flow controlling organization;
Described hydraulic power executing agency comprises upper bush, lower sleeve and is positioned at piston end cap between the two, and the inner space of three forms piston/cylinder, and piston can move back and forth vertically in described piston/cylinder; Piston is connected with piston rod;
The hydraulic line that described hydraulic control is injected and output mechanism comprises two input adapters and is connected with this input adapter, two input adapters lay respectively on described upper bush and cover with described piston end;
Described fluid flow controlling organization comprises the inner sliding sleeve be positioned at below piston end cap and the outer sliding sleeve be enclosed within outside inner sliding sleeve, and outer sliding sleeve is connected with described piston rod;
Described inner sliding sleeve has at least one throttle orifice; When outer sliding sleeve moves back and forth in the axial direction with piston, the throttle orifice on inner sliding sleeve can be opened or closed.
2. pilot-controlled switch sliding sleeve according to claim 1, is characterized in that: when described inner sliding sleeve having 2 and above throttle orifice, and throttle orifice is axially uniformly distributed along inner sliding sleeve.
3. pilot-controlled switch sliding sleeve according to claim 1 and 2, is characterized in that: described outer sliding sleeve is connected with described piston end cap by described lower sleeve, is provided with O type circle between outer sliding sleeve and lower sleeve.
4. pilot-controlled switch sliding sleeve according to claim 3, is characterized in that: described input adapter is 1/4 " NPT or card sheath button.
5. pilot-controlled switch sliding sleeve according to claim 1, is characterized in that: described hydraulic line is controlled by the gauge tap on ground, the hydraulic line be connected with piston end cap, piston/cylinder, the hydraulic line be connected with upper bush form U-shaped connection.
6. pilot-controlled switch sliding sleeve according to claim 5, is characterized in that: the connector position of described hydraulic line has draw-in groove, mutually clamps with the clip on input adapter.
7. pilot-controlled switch sliding sleeve according to claim 1, is characterized in that: on piston, be provided with O type circle, to ensure the sealing between piston and piston/cylinder;
Cover at piston end and be provided with O type circle, to ensure the sealing between piston end cap and piston;
O type circle is provided with between outer sliding sleeve and lower sleeve.
8. pilot-controlled switch sliding sleeve according to claim 1, is characterized in that: be connected with lower contact below described inner sliding sleeve, is provided with O type circle between.
9. pilot-controlled switch sliding sleeve according to claim 1, is characterized in that: described upper bush is connected with top connection.
CN201420451659.4U 2014-08-12 2014-08-12 A kind of pilot-controlled switch sliding sleeve Active CN204266988U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106368654A (en) * 2016-09-05 2017-02-01 中国石油化工股份有限公司 Oil extraction control tubular column and method of multilateral well
CN108798613A (en) * 2018-06-28 2018-11-13 中国海洋石油集团有限公司 A kind of sealing structure for Intelligent well underground flow controller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106368654A (en) * 2016-09-05 2017-02-01 中国石油化工股份有限公司 Oil extraction control tubular column and method of multilateral well
CN106368654B (en) * 2016-09-05 2021-04-23 中国石油化工股份有限公司 Multi-branch well control oil production pipe column and method
CN108798613A (en) * 2018-06-28 2018-11-13 中国海洋石油集团有限公司 A kind of sealing structure for Intelligent well underground flow controller
CN108798613B (en) * 2018-06-28 2020-11-24 中国海洋石油集团有限公司 Sealing structure for intelligent underground flow controller

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