CN1936267B - Pressure-controlled bridging system - Google Patents
Pressure-controlled bridging system Download PDFInfo
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- CN1936267B CN1936267B CN200610152425XA CN200610152425A CN1936267B CN 1936267 B CN1936267 B CN 1936267B CN 200610152425X A CN200610152425X A CN 200610152425XA CN 200610152425 A CN200610152425 A CN 200610152425A CN 1936267 B CN1936267 B CN 1936267B
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Abstract
The invention relates to a pressure controlling plug-in unit that includes column and arc shape or bevel edge planer. It also relates to a pressure control valve that includes a valve and pressure head that is set in valve cavity, which sets an interval channel. The interval channel passes through valve cavity. Plural outflow holes are set on the pressure head. Spring that could reset pressure head is set between pressure head and valve cavity. The invention also relates to a pressure control pipe and pressure control sieve tube and a pressure control distribution system. The invention is convenient to install and could be used in strait well, as well as horizontal well.
Description
Technical field
The invention belongs to technical field of petroleum extraction, especially a kind of when being applied to underground mining, the pressure-controlled bridging system that the voltage-controlled valve that is arranged on voltage-controlled pipe or voltage-controlled each section of screen casing is carried out the fluid access and exit control by voltage-controlled plug-in unit.
Background technology
In the oil and gas exploitation field, usually need be below the face of land very dark position squeeze into the oil gas well and carry out exploitation work, structure under the deep layer of the face of land as shown in Figure 1, for the stratum (oil-gas Layer) of good penetrability and not the infiltrative stratum of tool alternately constitute, wherein oil gas lies in the good stratum of infiltration, and the stratum of poor permeability is permeated good stratum with these and is closed up and down.Stratum B, D are oil-producing formation, and stratum A, C, E are impervious interlayer or interlayer, thereby stratum B, D become the oil-gas Layer of mutual isolation.
When oil-gas mining, need squeeze into water injection well in the both sides of oil gas well, the oil gas that will lie in oil-gas Layer by water filling is driven to the oil gas well, its principle such as Fig. 2, after oil gas is under pressure, because each layer all be up and down very poor interlayer of permeability and interlayer, so oil gas can only flow in the layer of place, is pooled to the oil gas well.When water filling, the stratum that has can shift to an earlier date water outlet, therefore when exploitation work, needs segmentation to exploit.
Referring to Fig. 3, be provided with the stay pipe 1 (sleeve pipe) of higher-strength and rigidity at the outer wall of oil gas well, in stay pipe 1, insert central tube 2, be provided with several packers 4 corresponding to the relatively poor stratum 8 of permeability on central tube 2, these packers 4 are divided into the cavity between stay pipe 1 and the central tube 2 in the space 7 of a plurality of mutual sealings.Stay pipe 1 is provided with several oil permeable holes 5, and central tube is provided with several stream sockets 6, and the oil gas in the oil-gas Layer 9 can enter into space 7 by these oil permeable holes 5 owing to be subjected to the pressure of water, enters the center-aisle of central tube 2 again from stream socket 6.These oil gas that enter into the oil gas well are drawn into the face of land by central tube 2 at last.
In the process of displacement of reservoir oil by filling water, because the oil-gas Layer poor permeability that has, the good penetrability that has, the oil gas water content that the oil-gas Layer that may have enters into central tube is very big, what have is then very little, therefore need close on the stratum that fuel-displaced moisture content is high,, improve the oil gas field recovery ratio to reduce moisture content.Way commonly used now is in the central tube 2 of oil gas well sliding sleeve switch 3 to be set, come the switching of the stream socket 6 on control centre's pipe 2 by the slip of sliding sleeve switch 3, the hook instrument that angles that need utilize wire rope to connect when practical operation hooks sliding sleeve switch 3, puies forward realizing the switching process of sliding sleeve switch 3 up and down.
Because the frictional force of sliding sleeve switch and central tube is bigger, use very dumbly, higher switch success rate can't be guaranteed, but also the disconnected accident of taking off of steel wire may be occurred.In addition, because the sliding sleeve switch that this wire rope connects needs gravity hook could be dropped to the position of the switch by the instrument that angles, therefore in horizontal well, can't use.Secondly, the work operations amount for the well of need Multi-band switch operation can be very big.
Summary of the invention
The objective of the invention is to propose a kind of pressure-controlled bridging system at all kinds of defective of sliding sleeve switch as the down-hole block switch, the fluid to the down-hole that can be convenient, flexible carries out block switch, and can use at horizontal well.
For achieving the above object, the invention provides a kind of voltage-controlled plug-in unit, voltage-controlled insert body is a cylinder.
In technique scheme, these voltage-controlled plug-in unit two ends are provided with arc or chamfer.
Further, voltage-controlled insert body inside is provided with the hollow channel that is used for fluid flow.
Voltage-controlled plug-in unit can move up and down in voltage-controlled pipe or voltage-controlled screen casing, the chamfering that its two ends are provided with can slip over the pressure head of voltage-controlled valve easily, can when sliding, do not stopped, and the inner hollow channel that is provided with of voltage-controlled plug-in unit can make fluid pass through smoothly by the pressure head of voltage-controlled valve.
Voltage-controlled plug-in unit can the monomer setting, promptly be provided with in the down-hole one or several mutually unconnected voltage-controlled plug-in units carry out block switch control; The setting of also can connecting promptly is provided with in the down-hole by one or several thick sections and one or several thin segments along body shaft to the voltage-controlled plug-in unit that is composed in series.
Further, also can between described thin segment and thick section, be provided with changeover portion.
Thick section can be closed voltage-controlled valve by the extruding to the pressure head of voltage-controlled valve open in usual; And thin segment does not contact with voltage-controlled valve, and perhaps the extruding to the pressure head of voltage-controlled valve is not enough to cause closing of voltage-controlled valve.
Be pressed onto voltage-controlled valve and cause voltage-controlled valve closing in order to make thin segment be unlikely to mistake, can on thin segment, be installed with one or several and make the radial axis centralizer placed in the middle of described thin segment.Centralizer body can be set to cylindrical or blade shaped, and two ends are provided with arc or chamfered transition.
For oil gas is exploited more easily, also be provided with one or several through holes that communicate with described hollow channel at described thin segment.
In addition, can also connect one on voltage-controlled insert body is used to keep and a borehole wall fixator of external borehole wall relative position.Borehole wall fixator can be the magnetic block of fixing by the magnetic force that attracts each other with the described borehole wall; Perhaps for by and the described borehole wall between the elastic friction block fixed of frictional force; Perhaps be widely used hanger, described voltage-controlled insert body is connected with described hanger by screw thread.
To achieve these goals, the invention provides a kind of voltage-controlled valve, comprise a valve body and a pressure head, described pressure head partly is arranged at body cavity, be provided with one in the described valve body for the mobile runner of fluid, this runner is by body cavity, and described pressure head is provided with several tap holes that is connected with described runner, is provided with the spring that pressure head is resetted between described pressure head and body cavity.
Described pressure head adopts hard wear-resistant material with the body cavity that contacts with pressure head.During underground mining, the voltage-controlled valve gate open often will be born very big pressure, friction and erosion effect, therefore needs employing carbide alloy or the wear-resistant ceramic material as pressure head and inner chamber.
In such scheme, can a groove be set in described pressure head, described elastic component is located between described groove and the body cavity.
Further, described valve body also can be made of the plunger bushing that metallic sheath and high-abrasive material are made, described plunger bushing is located at described metallic sheath inwall by cementing agent is sticking, and described metallic sheath outer surface is provided with screw thread, is provided with the bayonet socket that makes things convenient for fastened tools on described valve body.Screw thread is used for being fastenedly connected with the stream socket of central tube or screen casing (claiming anti-sandpipe again).For easy for installation, therefore the bayonet socket that makes things convenient for fastened tools is set on valve body.
In voltage-controlled valve, the switching of fluid can select to control by described pressure head side and body cavity sliding-contact the switching of described runner, perhaps controls the switching of described runner by the cooperation of ball valve base and valve ball.Because ball valve base and valve ball will bear very big pressure and frequent friction, so ball valve base and valve ball all need to adopt hard wear-resistant material, and for example carbide alloy or wear-resistant ceramic are as material.The ball valve base is arranged on body cavity, is provided with the fluid issuing that is communicated with runner on the ball valve base, and valve ball is arranged between elastic component and the ball valve base, the switching of control fluid issuing.
According to actual conditions, voltage-controlled valve also can adopt the normally closed type valve except adopting valve open in usual.
For achieving the above object, the invention provides a kind of voltage-controlled pipe, comprise a central tube and one or several voltage-controlled valves, the stream socket on described central tube is installed with described voltage-controlled valve, is used to control fluid flow.
In such scheme, voltage-controlled valve can be bonding or welding or be threaded in the stream socket of central tube, also can be integrally manufactured with central tube during fabrication.
For achieving the above object, the present invention also provides a kind of voltage-controlled screen casing, comprises a screen casing and one or several voltage-controlled valves, and the stream socket on described screen casing is installed with described voltage-controlled valve, is used to control fluid flow.
In such scheme, voltage-controlled valve can be bonding or welding or be threaded in the stream socket of screen casing, also can be integrally manufactured with screen casing during fabrication.
To achieve these goals, the invention provides a kind of pressure-controlled bridging system, comprising:
One voltage-controlled pipe or voltage-controlled screen casing, described voltage-controlled pipe comprises central tube and one or several voltage-controlled valves, stream socket on the described central tube is installed with described voltage-controlled valve, be used to control fluid flow, described voltage-controlled screen casing comprises screen casing and one or several voltage-controlled valves, stream socket on the described screen casing is installed with described voltage-controlled valve, is used to control fluid flow; Described voltage-controlled valve comprises a valve body and a pressure head that matches with voltage-controlled plug main body shape, described pressure head partly is arranged at body cavity, be provided with one in the described valve body for the mobile runner of fluid, this runner passes through body cavity, described pressure head is provided with several tap holes that is connected with described runner, is provided with the spring that pressure head is resetted between described pressure head and body cavity;
Voltage-controlled plug-in unit, described voltage-controlled insert body by the thick section of or several and one or several thin segments along body shaft to being composed in series, and described thick section by to the extruding occlusion pressure keyholed back plate of the pressure head of voltage-controlled valve open in usual or the voltage-controlled valve on the voltage-controlled screen casing, described thin segment does not contact with described voltage-controlled valve, perhaps the extruding to the pressure head of described voltage-controlled valve is not enough to cause closing of described voltage-controlled valve, and described voltage-controlled plug-in unit is used for coming in and going out by fluid is controlled in the extruding of the pressure head of described voltage-controlled valve;
One is located at the packing device between described voltage-controlled pipe or the voltage-controlled screen casing and the borehole wall.
In technique scheme, described packing device is that one or several are sheathed on the packer of described voltage-controlled pipe, perhaps is that one or several are sheathed on the packer of described voltage-controlled screen casing.Packer can make the fluid in the different sections on Different Strata or same stratum can not circulate.
Described packing device also can be for being sheathed on the excluder ring that is formed by solid particle of described voltage-controlled screen casing outer surface.Owing between the voltage-controlled pipe in down-hole and the borehole wall, have some spaces, can or utilize the accumulation campaign of reservoir sand to form this excluder ring by artificial filling.The axial seepage flow of this excluder ring cross section is with respect to radially the seepage flow cross section is very little, and therefore on the direction parallel with the screen casing axis, fluid permeability is difficulty relatively, has therefore also reached the effect of each section sealing to a certain extent.
Description of drawings
Fig. 1 is the organigram of subterranean oil gas-bearing formation.
Fig. 2 is the principle schematic of oil gas water flooding recovery.
Fig. 3 is the existing structural representation that is used for the separate system of oil-gas mining.
Fig. 4 is the structural representation of the embodiment one of pressure-controlled bridging system of the present invention.
Fig. 5 is the structural representation of an embodiment of the voltage-controlled valve of the present invention.
Fig. 6 is the structural representation of another embodiment of the voltage-controlled valve of the present invention.
Fig. 7 is the structural representation of an embodiment again of the voltage-controlled valve of the present invention.
Fig. 8 is the structural representation of the embodiment two of pressure-controlled bridging system of the present invention.
Fig. 9 is the structural representation of an embodiment of the voltage-controlled plug-in unit of the present invention.
Figure 10 is the structural representation of another embodiment of the voltage-controlled plug-in unit of the present invention.
Figure 11 is the structural representation of an embodiment of the voltage-controlled pipe of the present invention.
Figure 12 is the structural representation of the embodiment three of pressure-controlled bridging system of the present invention.
Figure 13 is the structural representation of an embodiment of the voltage-controlled screen casing of the present invention.
Figure 14 is the structural representation of the embodiment four of pressure-controlled bridging system of the present invention.
The specific embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The present invention is provided with voltage-controlled valve in the voltage-controlled pipe of down-hole or voltage-controlled screen casing, utilize voltage-controlled plug-in unit to carry out switch control.Voltage-controlled plug-in unit can and be settled according to the assembling of down-hole situation.
As shown in Figure 4, structural representation for the embodiment one of pressure-controlled bridging system of the present invention, voltage-controlled pipe 14 is set in the stay pipe or the borehole wall 1, and on central tube 14 sheathed several packers 4, packer 4 is divided into stay pipe or the borehole wall 1 and voltage-controlled pipe 14 with multistage and exploits corresponding space 7, voltage-controlled valve 11 is set on the stream socket 6 of central tube 2, can controls the circulation of fluid, fluid can only can flow into central tube 2 by voltage-controlled valve 11.
Voltage-controlled valve 11 can adopt voltage-controlled valve open in usual, and as shown in Figure 5, the structural representation for an embodiment of the voltage-controlled valve of the present invention comprises valve body 111 and pressure head 112, and pressure head 112 is arranged at the inner chamber of valve body 111, and can slide in valve body 111 inner chambers.Be provided with one in the valve body 111 for the mobile runner 113 of fluid, runner 113 is communicated with the water conservancy diversion layer 16 of voltage-controlled screen casing or the stream socket 6 of voltage-controlled pipe, and pass the inner chamber of valve body 111, on pressure head 112, be provided with the access hole 115 that several communicate with runner 113, fluid can be by the water conservancy diversion layer 16 of voltage-controlled screen casing or the stream socket 6 of voltage-controlled pipe, through valve body 111 inner chambers, again by the voltage-controlled valve of these access hole 115 turnover.
During underground mining, the voltage-controlled valve gate open often will be born very big pressure, friction and erosion effect, and in order to increase the application life of voltage-controlled valve, the inner chamber of pressure head 112 and valve body 111 can adopt hard wear-resistant material, for example carbide alloy or wear-resistant ceramic.In addition, except using voltage-controlled valve open in usual, the voltage-controlled valve of normally closed type also can according to circumstances use.
Between pressure head 112 and body cavity, also be provided with the spring 114 that pressure head is resetted, in the present embodiment, spring 114 is arranged on the pressure head outward flange, when pressure head 112 is squeezed, pressure head 112 is subjected to displacement towards the direction of body cavity, when pressure reaches certain numerical value, the sidewall of pressure head 112 can block runner 113, fluid can't be passed in and out, deformation can take place in spring 114 simultaneously, when being applied to the pressure disappearance on the pressure head 112 or being reduced to a certain degree, the elastic force of spring 114 can make pressure head 112 return to initial position.
Voltage-controlled valve 11 can weld or be bonding or be threaded on the inwall of central tube 2, also can be integrally manufactured with central tube 2.When employing was threaded, the outside of valve body 111 needed to be provided with screw thread 116, and the bayonet socket 117 that makes things convenient for fastened tools is set on the base of valve body 111 simultaneously.
As shown in Figure 6, structural representation for another embodiment of the voltage-controlled valve of the present invention, compare with a last embodiment, present embodiment has valve body and pressure head 112 ' equally, pressure head 112 ' is provided with several access holes 115 ' that communicates with runner 113 ', runner 113 ' is by the inner chamber of valve body, and is communicated with the water conservancy diversion layer 16 of voltage-controlled screen casing or the stream socket 6 of central tube 2.But the spring 114 ' in the present embodiment is arranged in the inner groove of pressure head 112 ' and realizes resetting, valve body is made of high-abrasive material plunger bushing 111a that makes and the metallic sheath 111b that is enclosed within plunger bushing 111a outside simultaneously, be provided with screw thread 116 ' on metallic sheath 111b, the bottom of plunger bushing 111a is provided with the bayonet socket 117 ' that makes things convenient for fastened tools.Bonding between metallic sheath 111b and the plunger bushing 111a by bonding agent.
As shown in Figure 7, the structural representation of an embodiment again for the voltage-controlled valve of the present invention, pressure head 112 in the present embodiment " be provided with an inner chamber; at pressure head 112 " on have several access holes 115 "; tap hole 115 " communicate with the inner chamber of valve body 111a ', the inner chamber of valve body 111a ' is provided with a ball valve base 118, has on ball valve base 118 and runner 113 " passage that links to each other, and be communicated with the water conservancy diversion layer 16 of voltage-controlled screen casing or the stream socket 6 of voltage-controlled pipe.Spring 114 " be pressed in pressure head 112 " inner chamber in, the other end contacts with the valve ball 119 that is located at ball valve base 118 passwaies.When pressure head 112 " when being squeezed, spring 114 " be compressed, to the pressure increase of valve ball 119, when this pressure greater than the inner fluid passage of ball valve base 118 during to the pressure of valve ball 119, valve ball 119 can be pressed on this passway, and fluid can't be flowed out, thereby reaches the effect of valve-off.
In the embodiment of this voltage-controlled valve, the outside of valve cavity 111a ' is also sticking to be provided with metallic sheath 111b ', and metallic sheath 111b ' is provided with screw thread, can be connected with the parent tube of central tube or screen casing.
In the voltage-controlled system of shunting, realize switch control, also need in central tube 2, plug voltage-controlled plug-in unit 10, when needs are closed certain voltage-controlled valve, the pressure head that voltage-controlled plug-in unit 10 sides is pushed this valve just can reach the effect of valve-off to a certain degree.Because the pressure head of voltage-controlled valve 11 is outwards outstanding, therefore inclined-plane or circular arc chamfering need be set in the end of voltage-controlled plug-in unit 10, stopped by pressure head preventing.When the multilayer oil-gas Layer is arranged, can adopt the voltage-controlled plug-in unit 10 ' of several monomer-types to carry out switch control respectively when underground, also can adopt the voltage-controlled plug-in unit 10 of tandem.
As shown in Figure 8, be the structural representation of the embodiment two of pressure-controlled bridging system of the present invention, adopt the voltage-controlled plug-in unit of monomer-type,, can use the voltage-controlled plug-in unit 10 ' of a plurality of monomer-types according to each section situation if be applied to the multistage exploitation.As shown in Figure 9, structural representation for an embodiment of the voltage-controlled plug-in unit of the present invention, voltage-controlled plug-in unit 10 ' is the voltage-controlled plug-in unit of monomer-type, its body is a cylinder, the end is provided with inclined-plane or circular arc chamfering, when voltage-controlled plug-in unit 10 ' is installed, because the existence of chamfering can prevent that the pressure head that voltage-controlled valve 11 stretches out from stopping voltage-controlled plug-in unit.When the side of voltage-controlled plug-in unit 10 ' moves to the pressure head of voltage-controlled valve 11, can cause to a certain degree extruding to pressure head, realize closing of voltage-controlled valve 11.
In order to make the fluid of exploiting out can passage be set in the centre of voltage-controlled plug-in unit than more smoothly by voltage-controlled plug-in unit.
As shown in figure 10, structural representation for another embodiment of the voltage-controlled plug-in unit of the present invention, present embodiment adopts the voltage-controlled plug-in unit 10 of tandem, it comprises that 101 and one of the thick sections of or several or several thin segments 102 are composed in series, in use, according to the position of settling, thick section 101 can be depressed the pressure head of voltage-controlled valve 11, thereby the fluid of closing this section is come in and gone out; And thin segment 102 can be to the pressure head generation effect of voltage-controlled valve 11, and the voltage-controlled valve 11 corresponding with thin segment 102 opened, and fluid can flow into central tubes 2 by voltage-controlled valve 11.
In order to prevent to be blocked, also be provided with changeover portion 103 in thick section 101 and thin segment 102 junctions by the pressure head of voltage-controlled valve 11.Need prevent that in use thin segment 102 is pressed onto the pressure head of voltage-controlled valve 11, and cause not right valve closing, centralizer 104 can also be set on thin segment, make the radial axis of thin segment placed in the middle.
For fixing voltage-controlled plug-in unit, on voltage-controlled insert body, can also connect one and be used to keep and a borehole wall fixator 106 of external borehole wall relative position.Borehole wall fixator 106 can be the magnetic block of fixing by the magnetic force that attracts each other with the borehole wall; Perhaps for by and the borehole wall between the elastic friction block fixed of frictional force; Perhaps be hanger general on the engineering, voltage-controlled insert body is connected with hanger by screw thread.
As shown in figure 11, be the structural representation of an embodiment of the voltage-controlled pipe of the present invention, voltage-controlled pipe 14 comprises central tube 2 and voltage-controlled valve 11, and voltage-controlled valve 11 can connect by screw, mode bonding or welding is installed in the stream socket 6 on central tube 2 inwalls.In addition, voltage-controlled valve can also be assembled with the central tube one, and central tube and voltage-controlled valve are connected in series, and the pressure head of voltage-controlled valve stretches out from central tube.
The invention provides a kind of pressure-controlled bridging system at sand output well, as shown in figure 12, structural representation for the embodiment three of pressure-controlled bridging system of the present invention, pressure-controlled bridging system is by voltage-controlled screen casing 15 and voltage-controlled plug-in unit 10 in the present embodiment, and several packers 4 formations, packer 4 is set in voltage-controlled screen casing 15.As shown in figure 13, structural representation for an embodiment of the voltage-controlled screen casing of the present invention, voltage-controlled screen casing 15 comprises screen casing and voltage-controlled valve, wherein screen casing is made of parent tube 12 and the filtration beds 17 that is wrapped on the parent tube 12, between parent tube 12 and filtration beds 17, has water conservancy diversion layer 16, the water conservancy diversion layer can also can be the gap between parent tube 12 and the filtration beds 17 by the medium with ducting capacity.Voltage-controlled valve 11 is installed on the stream socket of screen casing, and the runner of voltage-controlled valve 11 needs to be communicated with the water conservancy diversion layer 16 of screen casing.
For fear of voltage-controlled valve 11 is not high with the quality of connection of screen casing in use, also can screen casing 12 and voltage-controlled valve 11 is integrally manufactured.
The pressure-controlled bridging system that the present invention also provides another kind to utilize voltage-controlled screen casing referring to Figure 14, is covered with the excluder ring 13 that solid particle forms on screen casing 12.Owing between the voltage-controlled pipe in down-hole and the borehole wall, have some spaces, can or utilize the accumulation campaign of reservoir sand to form this excluder ring by artificial filling.The axial seepage flow of this excluder ring cross section is less relatively, and therefore on the direction parallel with the screen casing axis, fluid seepage flow is difficulty relatively, has therefore also reached the effect of each section sealing to a certain extent.
If the local sand control inefficacy of anti-sandpipe causes shake out, can push down the pressure head of voltage-controlled valve, close the sand control exhaustion phase, the oil gas well is returned to normal production with voltage-controlled plug-in unit.
The present invention can be applicable to the block switch that oil and gas well drives when exploitation, also can directly apply to water injection well, each section of water injection well is carried out switch control.And both can be used for straight well, also can be applicable to horizontal well.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (4)
1. a pressure-controlled bridging system is characterized in that, comprising:
One voltage-controlled pipe or voltage-controlled screen casing, described voltage-controlled pipe comprises central tube and one or several voltage-controlled valves, stream socket on the described central tube is installed with described voltage-controlled valve, be used to control fluid flow, described voltage-controlled screen casing comprises screen casing and one or several voltage-controlled valves, stream socket on the described screen casing is installed with described voltage-controlled valve, is used to control fluid flow; Described voltage-controlled valve comprises a valve body and a pressure head that matches with voltage-controlled plug main body shape, described pressure head partly is arranged at body cavity, be provided with one in the described valve body for the mobile runner of fluid, this runner passes through body cavity, described pressure head is provided with several tap holes that is connected with described runner, is provided with the spring that pressure head is resetted between described pressure head and body cavity;
Voltage-controlled plug-in unit, described voltage-controlled insert body by the thick section of or several and one or several thin segments along body shaft to being composed in series, and described thick section by to the extruding occlusion pressure keyholed back plate of the pressure head of voltage-controlled valve open in usual or the voltage-controlled valve on the voltage-controlled screen casing, described thin segment does not contact with described voltage-controlled valve, perhaps the extruding to the pressure head of described voltage-controlled valve is not enough to cause closing of described voltage-controlled valve, and described voltage-controlled plug-in unit is used for coming in and going out by fluid is controlled in the extruding of the pressure head of described voltage-controlled valve;
One is located at the packing device between described voltage-controlled pipe or the voltage-controlled screen casing and the borehole wall.
2. pressure-controlled bridging system according to claim 1 is characterized in that, described packing device is that one or several are sheathed on the packer of described voltage-controlled pipe.
3. pressure-controlled bridging system according to claim 1 is characterized in that, described packing device is that one or several are sheathed on the packer of described voltage-controlled screen casing.
4. pressure-controlled bridging system according to claim 1 is characterized in that, described packing device is the excluder ring that is formed by solid particle that is sheathed on described voltage-controlled screen casing outer surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610152425XA CN1936267B (en) | 2006-09-29 | 2006-09-29 | Pressure-controlled bridging system |
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| CN200610152425XA CN1936267B (en) | 2006-09-29 | 2006-09-29 | Pressure-controlled bridging system |
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| CN1936267A CN1936267A (en) | 2007-03-28 |
| CN1936267B true CN1936267B (en) | 2011-10-12 |
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| CN101476456B (en) * | 2008-01-04 | 2012-04-25 | 安东石油技术（集团）有限公司 | Filling water-control sieve tube and its laying method |
| CN101476455B (en) * | 2008-01-04 | 2012-04-25 | 安东石油技术（集团）有限公司 | Filling water-control sieve tube and its laying method |
| CN111878035B (en) * | 2020-08-04 | 2021-05-18 | 西南石油大学 | Mechanical underground slurry diversion tool and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596006Y (en) * | 2002-12-23 | 2003-12-31 | 北京海能海特石油科技发展有限公司 | Sieve tube having flow-rate control device |
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2006
- 2006-09-29 CN CN200610152425XA patent/CN1936267B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596006Y (en) * | 2002-12-23 | 2003-12-31 | 北京海能海特石油科技发展有限公司 | Sieve tube having flow-rate control device |
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| Publication number | Publication date |
|---|---|
| CN1936267A (en) | 2007-03-28 |
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