CN104060959A - Conventional well-flushing valve, pumping well and well flushing method for pumping well - Google Patents
Conventional well-flushing valve, pumping well and well flushing method for pumping well Download PDFInfo
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- CN104060959A CN104060959A CN201310086211.7A CN201310086211A CN104060959A CN 104060959 A CN104060959 A CN 104060959A CN 201310086211 A CN201310086211 A CN 201310086211A CN 104060959 A CN104060959 A CN 104060959A
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Abstract
The invention discloses a conventional well-flushing valve, a pumping well and a well flushing method for a pumping well, relates to the technical field of oil recovery of an oilfield, and solves the technical problem that the well flushing operation in the prior art is quite difficult. The conventional well-flushing valve comprises a main valve connector, an internal valve part, an external valve part and a fluid flow passage, wherein the fluid flow passage comprises an internal flow passage and an external flow passage; the internal flow passage is arranged on the cylinder wall of the main valve connector; the internal valve part can control the breakover of the internal flow passage; the external flow passage communicated with the internal flow passage is formed between an upper spacing seat and a lower connecting seat; the external valve part can control the breakover of the external flow passage. The pumping well comprises the conventional well-flushing valve provided by the invention. The well flushing method for the pumping well comprises the following steps: opening the conventional well-flushing valve, so as to enable the fluid flow passage on the conventional well-flushing valve, a flow string and an oil sleeve to be all in the communicated state; injecting flushing fluid in the flow string, so as to enable the flushing fluid to flow through the flow string, the fluid flow passage and the oil sleeve in sequence to realize the conventional well-flushing operation for the pumping well. The conventional well-flushing valve, the pumping well and the well flushing method for the pumping well reduce the difficulty of the conventional well-flushing operation for the pumping well.
Description
Technical field
The present invention relates to oil extraction in oil field technical field, be specifically related to a kind of Valve for washing and the pumpingh well of this Valve for washing, the pumping and washing process of this pumpingh well are set.
Background technology
In the development process in oil field, because strata pressure is low, can not blowing produce or along with the raising of recovery percent of reserves in oilfield development process, make whale pressure drop, while losing blowing production capacity, all need the method by artificial lift, to producing well, set up certain producing pressure differential, allow formation fluid can flow in pit shaft, and the stratum production fluid in oil well is given rise to ground, realize the oil recovery of low pressure oil well is produced.Sucker rod pumping technique is most widely used oil production technology in recovering the oil for low pressure oil well both at home and abroad at present.
In oil recovery process, need in oil well, be lowered to flow string as shown in Figure 1 (or claims: oil pipe) 2, lower fashionable oil pump sleeve or the pump seat be with in flow string 2 bottoms, then in flow string 2, being lowered to pumping pipe string (or claims: sucker rod) 1 and oil well pump, in the setting pump seat on flow string 2 of oil well pump, special-purpose oil pumper is installed on ground, utilize moving up and down that oil pumper provides, drive pumping pipe string 1 operation, pumping pipe string 1 pulls oil pumping infusion lower reciprocating motion beyond the Great Wall, realizes take the oil recovery of oil well pump as main artificial lift method.In oil recovery process, the temperature of oil well along with buried depth to lower and on progressively reduce, when formation oil air water flows from bottom to top in flow string 2, along with temperature constantly reduces, asphalitine in formation fluid, wax and colloid are separated out in a large number, precipitate is adsorbed on flow string 2 inwalls and pumping pipe string 1 outer wall under ionization, makes the production passage of flow string 2 more and more less, affects the normal production of oil well.For a long time, oil field solves the method for flow string 2 obstructions and mainly takes two kinds of methods: the one, flow string 2 is tripped out, after cleaning out the obstruction in managing and outside bar, ground is again lowered to operation, the method is commonly referred to as pump detection and workover in field, oil field, and pump detection and workover is that pumping pipe string 1, oil well pump and flow string 2 are tripped out to a kind of technique that pit shaft cleans and checks; The 2nd, take the process of hot clean-up well, with flushing fluid (in Fig. 1, arrow represents the flow direction of flushing fluid), obstruction is cleaned out, the method is commonly referred to as well-flushing in field, oil field, and well-flushing is a kind of by inject flushing fluid in pit shaft, the technique that the foreign material in pit shaft are cleaned up.
Because well-flushing is current most economical effective well maintenance technique, be also to extend the effective method of pump detection period, tired this, become oil field one of most widely used technique in oil recovery process.But, in carrying out washing well process, because oil well pump is positioned at tubing string bottom, be a kind of be equipped with unsteady valve (or claim: travelling valve) 11 and the single-stroke pump of standing valve 12, oil well pump is by valve, to control fluid to flow to top from bottom, and under the condition that can not reflux, realizes its oil pumping function, so, from oil jacket, (or claim: sleeve pipe) 3 while injecting well-flushing, and flushing fluid can flow in flow string 2 by oil well pump, realizes anti-flushing well operation; And while injecting from flow string 2, oil well pump valve has hindered flow channel, can not directly from flow string 2, inject flushing fluid, during positive well-flushing, can only pass through ground lifting means, oil well pump is put forward from pump seat, and flushing fluid flows into oil jacket 3 by the annular space of oil well pump and flow string 2 inner cores, from oil jacket 3, returns to ground and realizes positive well-flushing.In traditional well-flushing side, anti-flushing well operation has advantages of motionless pipe bar, but during anti-flushing well, flushing fluid injects from oil jacket 3, by returning out from flow string 2 after the oil well pump of bottom, in washing well process, flushing fluid is through flowing at oil jacket annular space 30, oil jacket annular space 30 spaces are large, thermal loss is large, while being easier to stop up tubing string section from arriving in flow string 2 column bottom inflow pipes near well head, temperature reduces again, thermal loss is large, the thermal efficiency of well-flushing is low, and weak effect will reach good well washing effect time-consuming with regard to extending duration of well flushing; Simultaneously, because flushing fluid flows into from flow string 2 bottoms, be easy to the sand of stratum output in pit shaft and other obstruction to bring in oil well pump, cause oil well pump valve seal failure or stuck and cannot normally work, if strata pressure is lower, flushing fluid is missed in a large number, not only easily pollutes reservoir, and well-flushing efficiency will be lower.While taking positive well-flushing, flushing fluid, from the interior injection of flow string 2, returns out from oil jacket 3, the flushing fluid flowing space is little, and the thermal efficiency is high, can in a short period of time the wax deposition in flow string 2, colloid and foreign material be cleaned out, flushing fluid, by the pump heart, does not cause damage to oil well pump.But positive well-flushing need to apply in advance workover rig or large-scale crane puts forward to set up circulation canal oil well pump in pump seat, well-flushing is complete also to be needed again pump to be lowered in pump seat and adjusts ginseng to touch pump, meanwhile, repeatedly pump proposed and is lowered to from pump seat, easily causing end seal failure.How effectively to solve the motionless pipe bar of pumpingh well and carry out positive well-flushing, oil extraction in oil field specialty research emphasis for a long time, the inventor finds in research work, in the switch valve research and development that the fixed tubular column of take is front topic condition, can rely on pressure controling mode method to realize.But due in the production of recovering the oil, during operation, flow string 2 is identical with the liquid level in oil jacket 3, flow string 2 internal and external pressure balances, and oil pumping machine oil pumping is after a period of time, along with the continuous output of oil well, stratum fluid supply capacity reduces, oil jacket annular space 3 liquid levels decline larger, caused the serious imbalance of oil jacket 3 pressure, the head of liquid in oil jacket 3 is less than the head of liquid in flow string 2, and the variation of this pressure differential is the process of dynamic change.Under this working condition, to realize pressure control switch and carry out flow string 2 posts entering mode and carrying out clean-out service, control difficulty increases, also do not have up to now the special tool of dependable performance to meet the needs of this process, cause oil field can only apply anti-flushing well operation or carry pump after well-flushing, operation easier is large, cost is high.
Summary of the invention
The object of the invention is to propose a kind of Valve for washing and the pumpingh well of this Valve for washing, the pumping and washing process of this pumpingh well are set, having solved prior art and had the technical problem that well-flushing operation easier is large.In addition, optimal technical scheme provided by the invention also has the plurality of advantages such as cost is low, liquid-saving petroleum, the well-flushing thermal efficiency is high, duration of well flushing is short.
For achieving the above object, the invention provides following technical scheme:
The Valve for washing that the embodiment of the present invention provides, comprises main valve joint, inversion mechanism, interior valve portion, outer valve portion and fluid passage, wherein:
Described fluid passage comprises inner flow passage and outer flow passage, and described main valve joint is on the barrel of tubular and described main valve joint and is provided with described inner flow passage;
Described interior valve portion is arranged on described inner flow passage place, and described interior valve portion can be controlled the whether conducting of described inner flow passage;
On described inner flow passage described main valve joint around, be provided with upper limit seat and the lower connecting base that protrudes described main valve joint outer surface of tube wall, the outer flow passage that between described upper limit seat and described lower connecting base, formation is connected with described inner flow passage;
Described outer valve portion is arranged on described upper limit seat and described lower connecting base, and described outer valve portion can be controlled the whether conducting of described outer flow passage.
At one, preferably or alternatively in embodiment, described interior valve portion comprises spring element and inner valve body, wherein:
Described inner valve body hides the external port of described inner flow passage;
Described spring element is between described inner valve body and described upper limit seat.
At one preferably or alternatively in embodiment, described lower connecting base be ring-type and its around a wherein end that is arranged on described main valve joint, between described inner valve body and described lower connecting base, be provided with inner liquid sealing structure, wherein:
Described inner liquid sealing structure comprises at least one annular groove that is arranged on described lower connecting base, is embedded in the first sealing ring and seal pressure cap in described annular groove, and one end that described inner valve body deviates from described spring element is resisted against on described the first sealing ring;
Described seal pressure cap is set in outside described lower connecting base and described the first sealing ring, and is threaded between described seal pressure cap and described lower connecting base.
At one preferably or alternatively in embodiment, described outer valve portion is hydraulic valve, and described outer valve portion comprises guide holder, outer valve and hydraulic oil control device, and described outer valve inner surface is provided with thrust projection, described guide holder is fixedly connected on a wherein end of described main valve joint, wherein:
Described outer valve is set in outside described main valve joint, and described outer valve can slide into along the axial direction of described main valve joint the position that opens or closes described outer flow passage with respect to described guide holder;
Space between described thrust projection and described outer valve, described guide holder, described main valve joint forms fluid cylinder, is provided with the upper liquid through-hole being connected with described upper fluid cylinder on the barrel of described main valve joint;
Space between described thrust projection and described outer valve, described upper limit seat, described main valve joint forms lower fluid cylinder, on described outer valve, be provided with the lower liquid through-hole being connected with described lower fluid cylinder, the hydraulic oil input/output port of described hydraulic oil control device is connected with described lower liquid through-hole.
At one, preferably or alternatively in embodiment, described outer valve portion also comprises the transposition central spindle tube being fixedly connected with described main valve joint, wherein:
Described guide holder is installed in wherein place, one end of described transposition central spindle tube, and described transposition central spindle tube deviates from the part of described main valve joint and the bottom of top connection is fixedly connected with;
Between described top connection and described outer valve, be provided with inversion mechanism, and described inversion mechanism can slide into along the axial direction of described main valve joint at described outer valve under the state of the position of opening described outer flow passage described outer valve is locked, described inversion mechanism can also again slide into along the axial direction of described main valve joint at described outer valve under the state of the position of opening described outer flow passage and remove the locking to described outer valve.
At one, preferably or alternatively in embodiment, described inversion mechanism comprises elastic body, transposition cover, transposition urceolus and transpositing pin, wherein:
Described transposition cover is set in outside described transposition central spindle tube, and described transposition urceolus is set in outside described transposition cover, and described transposition puts and is provided with at least two transposition grooves, and wherein one end of described transposition urceolus is fixedly connected with described outer valve;
The groove that replaces described in each includes long recess and the short groove interconnecting, and the long recess of the groove that replaces described in each is all connected with the short groove of the described transposition groove being adjacent;
Described long recess deviates from the wall body of described outer valve and is provided with the first wedge angle portion, and described short groove deviates from the wall body of described outer valve and is provided with the second wedge angle portion, on the wall body between described long recess and described short groove, is also provided with tricuspid bight;
Spacing between described short groove and described main valve joint is greater than the spacing between described long recess and described main valve joint;
Described elastomeric one end is connected on the lug boss of described top connection, and the described elastomeric other end is connected on described transposition urceolus;
Described transpositing pin is fixedly connected with described transposition urceolus, the urceolus that replaces described in when described outer valve slides into the position of opening described outer flow passage along the axial direction of described main valve joint can drive described transpositing pin from the inwall of described long recess deviate from and slip over the first wedge angle portion described in one of them, the second wedge angle portion and being articulated in tricuspid bight described in one of them on the inwall of described short groove described in one of them;
The urceolus that replaces described in when described outer valve slides into the position of opening described outer flow passage again along the axial direction of described main valve joint can drive described transpositing pin deviate from and slip on the inwall that is articulated in long recess described in another adjacent with described short groove described in the first wedge angle portion described in described the second wedge angle portion, wherein another and wherein another behind tricuspid bight from the inwall of described short groove.
At one preferably or alternatively in embodiment, described inversion mechanism also comprises and is arranged on the gathering sill in described top connection and is fixedly connected on the guide finger on described transposition urceolus, described guide finger is embedded in described gathering sill, and the length direction of described gathering sill parallels or coincides with described transposition cover axial direction.
At one, preferably or alternatively in embodiment, described outer valve comprises valve urceolus and the lower valve urceolus being fixedly connected with described upper valve urceolus, wherein:
Described thrust projection is arranged on the inner surface of described upper valve urceolus, described transposition urceolus is connected with the partial fixing that described upper valve urceolus deviates from described lower valve urceolus, and described lower valve urceolus can slide into along the axial direction of described main valve joint the position that opens or closes described outer flow passage with respect to described guide holder;
The part that described lower connecting base deviates from described main valve joint is also fixedly connected with lower contact;
Between described outer valve and described lower contact, be also provided with outer, liquid-tight seal structure, described outer, liquid-tight seal structure comprises and is arranged on the annular concave platform on described lower connecting base and is set in baffle ring on described annular concave platform, at least two the second sealing rings, spacer ring, described spacer ring is between two described the second sealing rings, described lower contact is connected to described in one of them on the second sealing ring, when described outer valve slides into the position of closing described outer flow passage, can cover and be pressed on outside described the second sealing ring.
The pumpingh well that the embodiment of the present invention provides, comprises arbitrary Valve for washing that pumping pipe string, flow string, oil jacket and the embodiment of the present invention provide, wherein:
Within described pumping pipe string is positioned at described flow string, within described flow string is positioned at described oil jacket;
On the tube wall of described flow string, be provided with the valve installing port of the tube wall that runs through described flow string, described Valve for washing be arranged on described valve installing port place and with the tube wall of the described flow string at described valve installing port place between liquid sealing be connected;
Described Valve for washing when open mode described in described fluid passage on Valve for washing be connected with described flow string, described oil jacket, described Valve for washing when closed condition described in described fluid passage on Valve for washing close.
The pumping and washing process of arbitrary pumpingh well that the embodiment of the present invention provides, comprises the following steps:
Open described Valve for washing, make fluid passage on described Valve for washing and described flow string, described oil jacket all in connected state;
In described flow string, inject flushing fluid, make described flushing fluid flow through successively described flow string, described fluid passage and described oil jacket to realize the positive well-flushing operation to pumpingh well.
Based on technique scheme, the embodiment of the present invention at least can produce following technique effect:
Because the present invention can open Valve for washing, can realize the positive well-flushing operation to pumpingh well, close Valve for washing, can carry out oil-recovery operations, there is not many defects of anti-flushing well operation, simultaneously, the positive pumping and washing process that adopts positive pumping and washing process provided by the invention that pumpingh well is carried out positive well-flushing operation and provided with prior art is compared, without applying in advance workover rig or large-scale crane, oil well pump is put forward to set up circulation canal in pump seat, well-flushing is complete also without again pump being lowered in pump seat and adjusting ginseng to touch pump, so overcome prior art, provide positive pumping and washing process existing many defects, open the operation of Valve for washing and with workover rig or large-scale crane, oil well pump is compared to operation easier and greatly reduced from putting forward to set up the method for circulation canal in pump seat in prior art, the cost expending also still less, having solved prior art exists well-flushing operation easier large, the technical problem that cost is high.
In addition, optimal technical scheme provided by the invention compared with prior art at least can also obtain following technique effect:
1, the present invention implements positive pumping and washing process on the pumpingh well that is provided with pressure-controlled repeatedly Valve for washing, technology characteristics is that application oil jacket annular pressure control Valve for washing (also can be called: switch flushing valve) and commutation herein, when oil jacket injects fluid, Valve for washing outer flow passage is opened, Valve for washing inner flow passage is not communicated with, thereby while guaranteeing to open outer flow passage, controlled pressure is not affected by inner flow passage.Oil jacket annular space stops after note, flow string internal and external pressure balance, and commutation keeps the unlatching of outer flow passage.Under outer flow passage open mode, while injecting well-flushing fluid from flow string, overpressure is higher than oil jacket annular pressure, and inner flow passage is opened under the effect of overpressure, reaches circulation object.
2, owing to keeping sealing state from the fashionable internal channel of oil jacket annular injection, the liquid that oil jacket annular space injects (for example: flushing fluid) cannot enter in tubing string, when making the present invention realize positive clean-out service, can realize fluid and enter the anti-flushing well technique in pipe from tubing string bottom mistake pump, be convenient to carry out under special circumstances anti-flushing well operation, thereby make the positive technology for washing well method of the motionless rod tube post of the pumpingh well based on pressure-controlled repeatedly Valve for washing of the present invention, the feature not only with positive well-flushing also possesses the process of anti-flushing well simultaneously.
3, low voltage difference is controlled, and transposition flexibility and reliability, can set up direct circulation as required at any time;
4, high resistance presses state compound seal, can effectively prevent seepage after multiple switching;
5, have monodirectional locking design, the outer valve portion that do not unlock there will not be maloperation.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is that available technology adopting anti-flushing well method is carried out the schematic diagram of the process of well-flushing operation to pumpingh well;
Fig. 2 carries out the schematic diagram of the process of positive well-flushing operation for the pumpingh well that the embodiment of the present invention is provided;
Fig. 3 carries out the schematic diagram of the process of anti-flushing well operation for the pumpingh well that the embodiment of the present invention is provided;
The cross-sectional schematic of the pumpingh well that Valve for washing is set that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 is the enlarged diagram of A part in Fig. 4;
Fig. 6 is the enlarged diagram of B part in Fig. 4;
Fig. 7 is the enlarged diagram of C part in Fig. 4;
Fig. 8 is the enlarged diagram of D part in Fig. 4;
The cross-sectional schematic of lower contact in the Valve for washing that Fig. 9 provides for the embodiment of the present invention;
The cross-sectional schematic of main valve joint in the Valve for washing that Figure 10 provides for the embodiment of the present invention;
The cross-sectional schematic of the upper valve urceolus of outer valve in the Valve for washing that Figure 11 provides for the embodiment of the present invention;
The cross-sectional schematic of the lower valve urceolus of outer valve in the Valve for washing that Figure 12 provides for the embodiment of the present invention;
The cross-sectional schematic of central spindle tube replaces in the Valve for washing that Figure 13 provides for the embodiment of the present invention;
Schematic diagram when transposition cover launches in the Valve for washing that Figure 14 provides for the embodiment of the present invention;
The schematic diagram of transposition cover in the Valve for washing that Figure 15 provides for the embodiment of the present invention;
Figure 16 is the cross-sectional schematic along A-A line in Figure 15;
Figure 17 is the cross-sectional schematic along B-B line in Figure 16;
The cross-sectional schematic of urceolus replaces in the Valve for washing that Figure 18 provides for the embodiment of the present invention;
The cross-sectional schematic of top connection in the Valve for washing that Figure 19 provides for the embodiment of the present invention;
Figure 20 is the cross-sectional schematic along C-C line in Figure 19;
The cross-sectional schematic of lower connecting base in the Valve for washing that Figure 21 provides for the embodiment of the present invention;
The cross-sectional schematic of seal pressure cap in the Valve for washing that Figure 22 provides for the embodiment of the present invention;
The cross-sectional schematic of inner valve body in the Valve for washing that Figure 23 provides for the embodiment of the present invention;
The schematic diagram of the Valve for washing elastic force part that Figure 24 provides for the embodiment of the present invention;
The be hit by a bullet schematic diagram of gonosome of the Valve for washing that Figure 25 provides for the embodiment of the present invention;
Reference numeral: 1, pumping pipe string; 11, unsteady valve; 12, standing valve; 2, flow string; 3, oil jacket; 30, oil jacket annular space; 4, fluid passage; 41, inner flow passage; 42, outer flow passage; 5, Valve for washing; 51, main valve joint; 511, upper limit seat; 52, spring element; 53, inner valve body; 541, annular groove; 542, the first sealing ring; 543, seal pressure cap; 55, guide holder; 56, outer valve; 561, thrust projection; 562, upper valve urceolus; 563, lower valve urceolus; 57, upper fluid cylinder; 571, upper liquid through-hole; 58, lower fluid cylinder; 581, lower liquid through-hole; 591, transposition central spindle tube; 592, top connection; 920, lug boss; 921, gathering sill; 593, elastic body; 594, transposition cover; 595, transposition urceolus; 951, guide finger; 596, transpositing pin; 597, transposition groove; 971, long recess; 972, short groove; 973, the first wedge angle portion; 974, the second wedge angle portion; 975, tricuspid bight; 598, lower connecting base; 599, lower contact; 991, annular concave platform; 992, the second sealing ring; 993, baffle ring; 994, spacer ring.
The specific embodiment
Below by accompanying drawing Fig. 2～Figure 25 and the mode of enumerating optional embodiment more of the present invention, technical scheme of the present invention (comprising optimal technical scheme) is described in further detail.It should be noted that: any technical characterictic in the present embodiment, any technical scheme is all the technical characterictic of plurality of optional or one or more in optional technical scheme, cannot exhaustive all alternative technical characterictics of the present invention and alternative technical scheme in order to describe succinct need in presents, also the embodiment that is not easy to each technical characterictic all emphasizes that it is one of optional numerous embodiments, so those skilled in the art should know: any technical characterictic and any technical scheme in the present embodiment all do not limit the scope of the invention, protection scope of the present invention should comprise that those skilled in the art do not pay the thinkable any alternate embodiments of creative work.
The pumpingh well that the embodiment of the present invention not only provides a kind of Valve for washing and Valve for washing is set, a kind of pumping and washing process for oil extraction in oil field technique pumpingh well is also provided, the method is a kind of under the front topic condition of the motionless pipe of pumpingh well (pumping pipe string 1), motionless roofbolt (flow string 2), take, from toward the interior injection flushing fluid of flow string 2 (Fig. 2, Fig. 3 arrow represent the flow direction of flushing fluid), from oil jacket annular space 30, to return out the positive technology for washing well method of flushing fluid.Motionless pipe of the present invention, the positive technology for washing well method of motionless roofbolt are by changing the flow string structure of pumpingh well, in traditional flow string, add and can adopt hydraulic oil to control and reused Valve for washing 5, this valve can be called: pressure-controlled repeatedly Valve for washing, utilize the switch of pressure-controlled repeatedly Valve for washing, realize pumpingh well under the condition of motionless pipe, motionless roofbolt, according to technology for washing well technical requirements, open at any time pressure-controlled repeatedly Valve for washing and carry out positive well-flushing, close pressure-controlled repeatedly Valve for washing and carry out oil producing operation.Thereby overcome under traditional flow string condition, on needing during well-flushing, carry pumping pipe string 1 and oil well pump is proposed to pump seat carry out positive well-flushing or directly from oil jacket annular space 30, inject the coordinating operation equipment that flushing fluid anti-flushing wells exist many, flushing fluid consumption is large, heat wash efficiency low, be prone to the problems such as oil well pump holddown, obstruction.
Below in conjunction with Fig. 2～Figure 25, technical scheme provided by the invention is carried out to more detailed elaboration, the technical scheme of arbitrary technological means provided by the invention being replaced or two or more technological means provided by the invention being combined mutually and obtain all should be within protection scope of the present invention.
As shown in Fig. 2～Figure 25, the Valve for washing 5 that the embodiment of the present invention provides comprises main valve joint 51, interior valve portion and outer valve portion.Outer valve portion is preferably hydraulic valve, wherein:
Fluid passage 4 comprises inner flow passage 41 and outer flow passage 42.Main valve joint 51 is tubular and it is positioned at flow string 2, and is provided with inner flow passage 41 on the barrel of main valve joint 51.
Interior valve portion is arranged on inner flow passage 41 places, and interior valve portion can be controlled whether conducting of inner flow passage 41.
On inner flow passage 41 main valve joint 51 around, be provided with protrude the upper limit seat 511 of main valve joint 51 outer surface of tube wall and lower connecting base (or claim: bottom valve joint) 598, the outer flow passage 42 that between upper limit seat 511 and lower connecting base 598, formation is connected with inner flow passage 41, oil jacket 3.
Outer valve portion is arranged on upper limit seat 511 and lower connecting base 598, and outer valve portion can be controlled whether conducting of outer flow passage 42.
When the present invention carries out well-flushing operation, can first by outer valve portion, open outer flow passage 42, and then partially open inner flow passage 41 by internal valve, with this, set up well-flushing fluid and (or claim: circulation canal flushing fluid).Because the pressure in flow string 2 and in oil jacket 3 is often to change, so coordinating, interior valve portion and outer valve portion control, can greatly improve the reliability of Valve for washing 5 provided by the invention.
As preferably a kind of or embodiment alternatively, interior valve portion comprises spring element 52 and inner valve body 53, wherein: inner valve body 53 hides the external port of inner flow passages 41.Spring element 52 is between inner valve body 53 and upper limit seat 511.Spring element 52 is preferably spring.Can utilize the compression shock of well-flushing fluid self and open inner valve body 53 to set up the circulation canal of well-flushing fluid, and then realize the cleaning to flow string 2 inside.
As preferably a kind of or embodiment alternatively, lower connecting base 598 is ring-type, and it is around a wherein end that is arranged on main valve joint 51, between inner valve body 53 and lower connecting base 598, is provided with inner liquid sealing structure, wherein:
Inner liquid sealing structure comprises at least one annular groove 541 that is arranged on lower connecting base 598, is embedded in the first sealing ring 542 and seal pressure cap 543 in annular groove 541, and one end that inner valve body 53 deviates from spring element 52 is resisted against on the first sealing ring 542.
Seal pressure cap 543 is set in outside lower connecting base 598 and the first sealing ring 542, and is threaded between seal pressure cap 543 and lower connecting base 598.
Inner liquid sealing structure can improve interior valve portion and close inner flow passage liquid sealing performance afterwards, thereby improves the reliability of Valve for washing 5.
As preferably a kind of or embodiment alternatively, outer valve portion comprises guide holder 55, outer valve 56 and hydraulic oil control device, and outer valve 56 inner surfaces are provided with thrust projection 561, and guide holder 55 is fixedly connected on a wherein end of main valve joint 51, wherein:
Outer valve 56 is set in outside main valve joint 51, and outer valve 56 can slide into along the axial direction of main valve joint 51 position that opens or closes outer flow passage 42 with respect to guide holder 55.
Space between thrust projection 561 and outer valve 56, guide holder 55, main valve joint 51 forms fluid cylinder 57, is provided with the upper liquid through-hole 571 being connected with upper fluid cylinder 57 on the barrel of main valve joint 51.
Space between thrust projection 561 and outer valve 56, upper limit seat 511, main valve joint 51 forms lower fluid cylinder 58, is provided with the lower liquid through-hole 581 being connected with lower fluid cylinder 58 on outer valve 56.The hydraulic oil input/output port of hydraulic oil control device is connected with described lower liquid through-hole 581.
Hydraulic oil control device from oil jacket annular space 30 by liquid through-hole 581 when the interior injection liquid force feed of lower fluid cylinder 58 (now also can be described as: control liquid), hydraulic oil can drive outer valves 56 along the axial direction of main valve joint 51, to slide into the position of opening outer flow passage 42 with respect to guide holder 55 by thrust projection 561, in like manner, by upper liquid through-hole 571 for example, when the interior injection of upper fluid cylinder 57 has the liquid (flushing fluid) of pressure, this liquid with pressure can drive outer valves 56 along the axial direction of main valve joint 51, to slide into the position of closing outer flow passage 42 with respect to guide holder 55 by thrust projection 561.
As preferably a kind of or embodiment alternatively, outer valve portion also comprises the transposition central spindle tube 591 being fixedly connected with main valve joint 51, wherein:
Guide holder 55 is installed in wherein place, one end of transposition central spindle tube 591, and the part that transposition central spindle tube 591 deviates from main valve joint 51 is fixedly connected with the bottom of top connection 592.
While applying the present invention on pumpingh well, the top of top connection 592 can be fixedly connected with the bottom of the tube wall of the flow string 2 at valve installing port place.
Between top connection 592 and outer valve 56, be provided with inversion mechanism, and inversion mechanism can slide into along the axial direction of main valve joint 51 at outer valve 56 under the state of the position of opening outer flow passage 42 outer valve 56 is locked, inversion mechanism can also again slide into along the axial direction of main valve joint 51 at outer valve 56 under the state of the position of opening outer flow passage 42 and remove the locking to outer valve 56.
Inversion mechanism can lock outer valve 56 to maintain the conducting state of outer flow passage 42.
A kind of concrete embodiment of detailed explanation inversion mechanism provided by the invention below.Use other inversion mechanisms (for example: the locking mechanism that automatic ball-pen pen core adopts) with the technical scheme that substitutes this embodiment also within protection scope of the present invention.
As preferably a kind of or embodiment alternatively, inversion mechanism comprises that elastic body 593(is preferably spring), transposition cover 594, transposition urceolus 595 and transpositing pin 596, wherein:
Transposition cover 594 is set in outside transposition central spindle tube 591, and on the surface of transposition cover 594, is provided with at least two transposition grooves 597, and wherein one end of transposition urceolus 595 is fixedly connected with outer valve 56, and transposition urceolus 595 is set in outside transposition cover 594.
Each transposition groove 597 includes long recess 971 and the short groove 972 interconnecting, and the long recess 971 of each transposition groove 597 is all connected with the short groove 972 of the transposition groove 597 being adjacent.
Long recess 971 deviates from the wall body of outer valve 56 and is provided with the first wedge angle portion 973, and short groove 972 deviates from the wall body of outer valve 56 and is provided with the second wedge angle portion 974, on the wall body between long recess 971 and short groove 972, is also provided with tricuspid bight 975.
Spacing between short groove 972 and main valve joint 51 is greater than the spacing between long recess 971 and main valve joint 51.One end of elastic body 593 is connected on the lug boss 920 on top connection 592 external surfaces, and the other end of elastic body 593 is connected on transposition urceolus 595.
Transpositing pin 596 is fixedly connected with transposition urceolus 595, outer valve 56 when the axial direction of main valve joint 51 slides into the position of opening outer flow passage 42, replace urceolus 595 can drive transpositing pin 596 from the inwall of long recess 971 deviate from and slip over one of them first wedge angle portion 973, one of them the second wedge angle portion 974 and one of them tricuspid bight 975 be articulated on the inwall of short groove 972.
Outer valve 56 when the axial direction of main valve joint 51 slides into the position of opening outer flow passage 42 again, replace urceolus 595 can drive transpositing pin 596 from the inwall of short groove 972 deviate from and slip over described the second wedge angle portion 974, wherein another the first wedge angle portion 973, wherein behind another tricuspid bight 975, be articulated on the inwall of another another long recess 971 adjacent with short groove 972.
In above-mentioned inversion mechanism transposition process, transpositing pin 596 can promote transposition cover 594 simultaneously and rotate around transposition central spindle tube 591 while slipping over the first wedge angle portion 973, the second wedge angle portion 974 and tricuspid bight 975.
As preferably a kind of or embodiment alternatively, inversion mechanism also comprises the gathering sill 921 being arranged in top connection 592 and is fixedly connected on the guide finger 951 on transposition urceolus 595, guide finger 951 is embedded in gathering sill 921, and the length direction of gathering sill 921 parallels or coincides with transposition cover 594 axial directions.
Gathering sill 921 has played the effect of leading with guide finger 951, can maintain the constant of transposition urceolus 595 and guide finger 951 position glide directions.
As preferably a kind of or embodiment alternatively, outer valve 56 comprises valve urceolus 562 and the lower valve urceolus 563 that is fixedly connected with (be preferably by screw thread and form dismountable being fixedly connected with) with upper valve urceolus 562, thrust projection 561 is arranged on the inner surface of valve urceolus 562, transposition urceolus 595 is connected with the partial fixing that upper valve urceolus 562 deviates from lower valve urceolus 563, and lower valve urceolus 563 can slide into along the axial direction of main valve joint 51 position that opens or closes outer flow passage 42 with respect to guide holder 55.
Manufacture and the installation of outer valve 56 is convenient in this design.
The part that lower connecting base 598 deviates from main valve joint 51 is fixedly connected with the top of lower contact 599.While applying the present invention on pumpingh well, the low side of lower contact 599 can be fixedly connected with the bottom of the tube wall of the flow string 2 at valve installing port place.
Between outer valve 56 and lower contact 599, be also provided with outer, liquid-tight seal structure, outer, liquid-tight seal structure comprises the annular concave platform 991 being arranged on lower connecting base 598 and is set in baffle ring on annular concave platform 991 993, at least two the second sealing rings 992, spacer ring 994, spacer ring 994 is between two the second sealing rings 992, and lower contact 599 is connected on one of them second sealing ring 992.When outer valve 56 slides into the position of closing outer flow passage 42, can cover and be pressed on outside the second sealing ring 992 in lower contact 599.
The second sealing ring 992 be provided with the sealing effectiveness that helps improve outer valve portion.
The pumpingh well that the embodiment of the present invention provides comprises pumping pipe string 1, flow string 2, oil jacket 3 and Valve for washing 5, wherein:
Within pumping pipe string 1 is positioned at flow string 2, within flow string 2 is positioned at oil jacket 3.
On the tube wall of flow string 2, be provided with the valve installing port of the tube wall that runs through described flow string, Valve for washing 5 be arranged on valve installing port place and with the tube wall of the described flow string 2 at described valve installing port place between liquid sealing be connected.
Valve for washing 5 fluid passage on Valve for washing 54 when open mode is connected with flow string 2, oil jacket 3, and Valve for washing 5 fluid passage on Valve for washing 54 when closed condition is closed.
Use in process of the present invention, open Valve for washing 5 and can realize the positive well-flushing operation to pumpingh well, close Valve for washing 5 and can carry out oil-recovery operations, there is not many defects of anti-flushing well operation, simultaneously, adopting the present invention to overcome prior art provides positive pumping and washing process existing many defects, open the operation of Valve for washing 5 and with workover rig or large-scale crane, oil well pump is compared to operation easier and greatly reduced from putting forward to set up the method for circulation canal in pump seat in prior art, the cost expending also still less.
Certainly, the valve that uses other structures should be considered as being equal to replacement with the technical scheme of the Valve for washing 5 that substitutes the invention described above and provide, so also within protection scope of the present invention.
As shown in Fig. 2～Figure 25, the pumping and washing process of the arbitrary pumpingh well providing of the embodiment of the present invention, comprises the following steps:
Open Valve for washing 5, make fluid passage on Valve for washing 54 with flow string 2, oil jacket 3 all in connected state.
At the interior injection flushing fluid of flow string 2, make flushing fluid flow through successively flow string 2, fluid passage and oil jacket 3 to realize the positive well-flushing operation to pumpingh well.
The positive well-flushing operation of the pumpingh well that can adopt said method to realize the embodiment of the present invention is provided.Certainly, the pumpingh well that also can close the method for Valve for washing 5 use anti-flushing wells in needs the embodiment of the present invention is provided carries out well-flushing operation.
Use other valves with the technical scheme of the Valve for washing 5 that substitutes the invention described above and provide also within protection scope of the present invention.
From above-mentioned elaboration: the present invention is overcoming on the in-problem basis of existing pumpingh well technology for washing well, a kind of pressure-controlled repeatedly Valve for washing of invention and the positive pumping and washing process of the motionless rod tube post of the pumpingh well based on pressure-controlled repeatedly Valve for washing.
As shown in Fig. 2～Figure 25, in invention, by research technology for washing well process and technological process, the direction of motion of well-flushing fluid in technology for washing well process and pressure are changed to the impact research on oil tool; based on developing the superiority of the positive technology for washing well of tradition and overcoming the defect that the positive technology for washing well of tradition exists the operation of moving pipe bar, analyze oil jacket 3 annular pressures and flow string 2(abbreviation oil pipe in pumpingh well manufacturing process and in technology for washing well) pressure variation characteristic, applying pressure is controlled to the switch of well-flushing passage, from the flow string 2 positive well-flushing of interior injection flushing fluid and oil recovery manufacturing process tubing pressure, higher than well-flushing passage in the situation of oil jacket pressure, keep closing as basic theme, fully analyze in positive washing well process, flushing fluid is from the glide path of flow string 2 interior injections and the opposition characteristic of the sealing direction after the extraction of manufacturing process annular fluid stream, in invention, handle is divided into the associated control of inside and outside two parts (interior valve portion and outer valve portion) by the pressure channel of the interior injection flushing fluid of flow string 2 with the pressure channel by oil jacket annular space 30 injection liquid force feeds, in having researched and developed, the associated pressure-controlled repeatedly Valve for washing 5 of controlling of outer dual channel, developed the positive technology for washing well method of the motionless rod tube post of pumpingh well based on pressure-controlled repeatedly Valve for washing 5, reached the object that motionless pipe roofbolt carries out the positive well-flushing of pumpingh well.
The positive pumping and washing process of the motionless rod tube post of pumpingh well based on pressure-controlled repeatedly Valve for washing 5 of the present invention, that a kind of redesign by tubular column structure changes, on traditional flow string 2, increase pressure-controlled repeatedly Valve for washing 5, thereby on the flow string more than oil well pump 2, set up positive well-flushing passage, during the lower fluid cylinder 58 injection liquid force feed of formation from oil jacket annular space 30 toward flow string 2, annular pressure is controlled positive well-flushing outer flow passage and is opened, during from the interior injection flushing fluid of flow string 2, flow string 2 internal pressures are controlled positive well-flushing inner flow passage unlatching, reach motionless pipe roofbolt and realize the object of positive well-flushing.The present invention is based on the positive pumping and washing process of pumpingh well of pressure-controlled repeatedly Valve for washing 5, technology characteristics is switch and the commutation that application flow string 2 annular pressures are controlled Valve for washing, in oil jacket annular space 30 down during fluid cylinder 58 injection liquid force feed, Valve for washing 5(also can be described as Valve for washing herein) outer flow passage 42 opens, Valve for washing inner flow passage 41 is not communicated with, thereby while guaranteeing to open outer flow passage 42, controlled pressure is not affected by inner flow passage 41.Oil jacket 3 annular spaces stop after note, oil pipe internal and external pressure balance, and commutation keeps the unlatching of outer flow passage 42.Under outer flow passage 42 open modes, when the interior injection well-flushing of flow string 2 fluid, overpressure is higher than oil jacket 3 annular pressures, and inner flow passage 41 is opened under the effect of overpressure, reaches circulation object.
Simultaneously, owing to keeping sealing state from the fashionable inner flow passage 41 of oil jacket 3 annular injection, annular space injection liquid cannot enter in flow string 2, when making the present invention realize positive clean-out service, can realize fluid and enter the anti-flushing well technique in pipe from tubing string bottom mistake pump, be convenient to carry out under special circumstances anti-flushing well operation, thereby make the positive technology for washing well method of the motionless rod tube post of the pumpingh well based on pressure-controlled repeatedly Valve for washing 5 of the present invention, the feature not only with positive well-flushing also possesses the process of anti-flushing well simultaneously.
Core of the present invention is that pressure-controlled repeatedly Valve for washing 5 has been researched and developed in design in tubular column structure, and the mechanism of action by this special tool(s) has realized the not positive pumping and washing process of lever, fixed tubular column of pumpingh well.Valve spring), inner liquid sealing structure (is called for short: interior sealing), outer, liquid-tight seal structure (is called for short: external seal) and the composition such as lower contact 599 power spring), inversion mechanism, upper fluid cylinder 57, lower fluid cylinder 58, spring element 52(can claim herein the structure of the pressure-controlled repeatedly Valve for washing 5 that embodiment of the present invention preferred embodiment provides is from top to down by top connection 592, and elastic body 593(can claim herein::.The mechanism of action of this Valve for washing is as follows:
During normal production, flow string 2 internal and external pressure balances or overpressure are always greater than oil jacket 3 annular pressures, the active force of upper fluid cylinder 57 is equal to or greater than lower fluid cylinder 58 all the time, outer valve (or claiming valve urceolus) 56 remains on external seal position compression seal, outer valve portion is in closed condition, and fluid cannot pass through, and along with the increase of inside and outside differential pressure, the motive force of 56 pairs of external seals of outer valve is larger, has guaranteed the sealing performance under High Pressure Difference state.While suppressing (injection liquid force feed) from annular space, the active force of upper fluid cylinder 57 is less than lower fluid cylinder 58 active forces, hydraulic coupling overcomes that the promotion valve urceolus of power spring is up, and valve urceolus leaves external seal, and outer valve portion is in an open position, after valve urceolus is up, the transposition of promotion inversion mechanism, after annular pressure discharges, valve urceolus is subject to inversion mechanism spacing, come downwards to 1/3 position locked, outer valve portion remains on opening.During from the interior injection flushing fluid of flow string 2, interior valve portion pressurized overcomes that valve spring power is up leaves interior sealing, and internal valve partially opens, and flushing fluid can flow out and realize positive well-flushing from inner flow passage, outer flow passage successively smoothly.When well-flushing finishes to stop interior injection, tubing string internal and external pressure balance, interior valve portion is descending closing under valve spring power and action of hydraulic force.While injecting control liquid from annular space, the active force of upper fluid cylinder 57 is less than lower fluid cylinder 58 active forces, and hydraulic coupling overcomes power spring power makes valve urceolus up, the transposition of promotion inversion mechanism, after annular pressure discharges, it is descending that power spring promotes valve urceolus, valve urceolus is engaged with external seal, and outer valve portion is closed.
The disclosed arbitrary technical scheme of the invention described above unless otherwise stated, if it discloses number range, so disclosed number range is preferred number range, any it should be appreciated by those skilled in the art: preferred number range is only the obvious or representative numerical value of technique effect in many enforceable numerical value.Because numerical value is more, cannot be exhaustive, so the present invention just discloses part numerical value to illustrate technical scheme of the present invention, and the above-mentioned numerical value of enumerating should not form the restriction to the invention protection domain.
Simultaneously, if the invention described above discloses or has related to component or the structural member of connection fastened to each other, so, unless otherwise stated, be fixedly connected with and can be understood as: can dismantle and be fixedly connected with (for example using bolt or screw to connect), also can be understood as: non-removable being fixedly connected with (for example rivet, weld), certainly, connection fastened to each other also can for example, be replaced (obviously cannot adopt except integrally formed technique) by integral type structure (use casting technique is integrally formed to be created).
In addition, in the disclosed arbitrary technical scheme of the invention described above applied for the term that represents position relationship or shape unless otherwise stated its implication comprise and its approximate, similar or approaching state or shape.Arbitrary parts provided by the invention can be both to be assembled by a plurality of independent ingredients, the produced separate part of the technique that also can be one of the forming.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement the specific embodiment of the present invention; And not departing 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 (10)
1. a Valve for washing, is characterized in that, comprises main valve joint, interior valve portion, outer valve portion and fluid passage, wherein:
Described fluid passage comprises inner flow passage and outer flow passage, and described main valve joint is on the barrel of tubular and described main valve joint and is provided with described inner flow passage;
Described interior valve portion is arranged on described inner flow passage place, and described interior valve portion can be controlled the whether conducting of described inner flow passage;
On described inner flow passage described main valve joint around, be provided with upper limit seat and the lower connecting base that protrudes described main valve joint outer surface of tube wall, the outer flow passage that between described upper limit seat and described lower connecting base, formation is connected with described inner flow passage;
Described outer valve portion is arranged on described upper limit seat and described lower connecting base, and described outer valve portion can be controlled the whether conducting of described outer flow passage.
2. Valve for washing according to claim 1, is characterized in that, described interior valve portion comprises spring element and inner valve body, wherein:
Described inner valve body hides the external port of described inner flow passage;
Described spring element is between described inner valve body and described upper limit seat.
3. Valve for washing according to claim 2, is characterized in that, described lower connecting base be ring-type and its around a wherein end that is arranged on described main valve joint, between described inner valve body and described lower connecting base, be provided with inner liquid sealing structure, wherein:
Described inner liquid sealing structure comprises at least one annular groove that is arranged on described lower connecting base, is embedded in the first sealing ring and seal pressure cap in described annular groove, and one end that described inner valve body deviates from described spring element is resisted against on described the first sealing ring;
Described seal pressure cap is set in outside described lower connecting base and described the first sealing ring, and is threaded between described seal pressure cap and described lower connecting base.
4. according to the Valve for washing described in claim 1 or 2 or 3, it is characterized in that, described outer valve portion is hydraulic valve, described outer valve portion comprises guide holder, outer valve and hydraulic oil control device, described outer valve inner surface is provided with thrust projection, described guide holder is fixedly connected on a wherein end of described main valve joint, wherein:
Described outer valve is set in outside described main valve joint, and described outer valve can slide into along the axial direction of described main valve joint the position that opens or closes described outer flow passage with respect to described guide holder;
Space between described thrust projection and described outer valve, described guide holder, described main valve joint forms fluid cylinder, is provided with the upper liquid through-hole being connected with described upper fluid cylinder on the barrel of described main valve joint;
Space between described thrust projection and described outer valve, described upper limit seat, described main valve joint forms lower fluid cylinder, on described outer valve, be provided with the lower liquid through-hole being connected with described lower fluid cylinder, the hydraulic oil input/output port of described hydraulic oil control device is connected with described lower liquid through-hole.
5. Valve for washing according to claim 4, is characterized in that, described outer valve portion also comprises the transposition central spindle tube being fixedly connected with described main valve joint, wherein:
Described guide holder is installed in wherein place, one end of described transposition central spindle tube, and described transposition central spindle tube deviates from the part of described main valve joint and the bottom of top connection is fixedly connected with;
Between described top connection and described outer valve, be provided with inversion mechanism, and described inversion mechanism can slide into along the axial direction of described main valve joint at described outer valve under the state of the position of opening described outer flow passage described outer valve is locked, described inversion mechanism can also again slide into along the axial direction of described main valve joint at described outer valve under the state of the position of opening described outer flow passage and remove the locking to described outer valve.
6. Valve for washing according to claim 5, is characterized in that, described inversion mechanism comprises elastic body, transposition cover, transposition urceolus and transpositing pin, wherein:
Described transposition cover is set in outside described transposition central spindle tube, and described transposition urceolus is set in outside described transposition cover, and described transposition puts and is provided with at least two transposition grooves, and wherein one end of described transposition urceolus is fixedly connected with described outer valve;
The groove that replaces described in each includes long recess and the short groove interconnecting, and the long recess of the groove that replaces described in each is all connected with the short groove of the described transposition groove being adjacent;
Described long recess deviates from the wall body of described outer valve and is provided with the first wedge angle portion, and described short groove deviates from the wall body of described outer valve and is provided with the second wedge angle portion, on the wall body between described long recess and described short groove, is also provided with tricuspid bight;
Spacing between described short groove and described main valve joint is greater than the spacing between described long recess and described main valve joint;
Described elastomeric one end is connected on the lug boss of described top connection, and the described elastomeric other end is connected on described transposition urceolus;
Described transpositing pin is fixedly connected with described transposition urceolus, the urceolus that replaces described in when described outer valve slides into the position of opening described outer flow passage along the axial direction of described main valve joint can drive described transpositing pin from the inwall of described long recess deviate from and slip over the first wedge angle portion described in one of them, the second wedge angle portion and being articulated in tricuspid bight described in one of them on the inwall of described short groove described in one of them;
The urceolus that replaces described in when described outer valve slides into the position of opening described outer flow passage again along the axial direction of described main valve joint can drive described transpositing pin deviate from and slip on the inwall that is articulated in long recess described in another adjacent with described short groove described in the first wedge angle portion described in described the second wedge angle portion, wherein another and wherein another behind tricuspid bight from the inwall of described short groove.
7. Valve for washing according to claim 6, it is characterized in that, described inversion mechanism also comprises and is arranged on the gathering sill in described top connection and is fixedly connected on the guide finger on described transposition urceolus, described guide finger is embedded in described gathering sill, and the length direction of described gathering sill parallels or coincides with described transposition cover axial direction.
8. Valve for washing according to claim 6, is characterized in that, described outer valve comprises valve urceolus and the lower valve urceolus being fixedly connected with described upper valve urceolus, wherein:
Described thrust projection is arranged on the inner surface of described upper valve urceolus, described transposition urceolus is connected with the partial fixing that described upper valve urceolus deviates from described lower valve urceolus, and described lower valve urceolus can slide into along the axial direction of described main valve joint the position that opens or closes described outer flow passage with respect to described guide holder;
The part that described lower connecting base deviates from described main valve joint is also fixedly connected with lower contact;
Between described outer valve and described lower contact, be also provided with outer, liquid-tight seal structure, described outer, liquid-tight seal structure comprises and is arranged on the annular concave platform on described lower connecting base and is set in baffle ring on described annular concave platform, at least two the second sealing rings, spacer ring, described spacer ring is between two described the second sealing rings, described lower contact is connected to described in one of them on the second sealing ring, when described outer valve slides into the position of closing described outer flow passage, can cover and be pressed on outside described the second sealing ring.
9. a pumpingh well, is characterized in that, comprises the arbitrary described Valve for washing of pumping pipe string, flow string, oil jacket and claim 1-8, wherein:
Within described pumping pipe string is positioned at described flow string, within described flow string is positioned at described oil jacket;
On the tube wall of described flow string, be provided with the valve installing port of the tube wall that runs through described flow string, described Valve for washing be arranged on described valve installing port place and with the tube wall of the described flow string at described valve installing port place between liquid sealing be connected;
Described Valve for washing when open mode described in described fluid passage on Valve for washing be connected with described flow string, described oil jacket, described Valve for washing when closed condition described in described fluid passage on Valve for washing close.
10. a pumping and washing process for pumpingh well described in claim 9, is characterized in that, comprises the following steps:
Open described Valve for washing, make fluid passage on described Valve for washing and described flow string, described oil jacket all in connected state;
In described flow string, inject flushing fluid, make described flushing fluid flow through successively described flow string, described fluid passage and described oil jacket to realize the positive well-flushing operation to pumpingh well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310086211.7A CN104060959A (en) | 2013-03-19 | 2013-03-19 | Conventional well-flushing valve, pumping well and well flushing method for pumping well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310086211.7A CN104060959A (en) | 2013-03-19 | 2013-03-19 | Conventional well-flushing valve, pumping well and well flushing method for pumping well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104060959A true CN104060959A (en) | 2014-09-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310086211.7A Pending CN104060959A (en) | 2013-03-19 | 2013-03-19 | Conventional well-flushing valve, pumping well and well flushing method for pumping well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104060959A (en) |
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| CN104879096A (en) * | 2015-06-05 | 2015-09-02 | 中国石油天然气股份有限公司 | Sidetracked well oil extraction device |
| CN112360370A (en) * | 2020-10-20 | 2021-02-12 | 中国石油大学(北京) | Rotary descaling and blockage removing device |
| CN112916528A (en) * | 2021-02-08 | 2021-06-08 | 宁夏振盐鑫盛通工贸有限公司 | A airtight belt cleaning device for oil-water well is restoreed and is maintained |
| CN113445955A (en) * | 2021-08-09 | 2021-09-28 | 湖北福瑞得能源科技有限公司 | Multifunctional intelligent oil well hot washing stratum protector and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104879096A (en) * | 2015-06-05 | 2015-09-02 | 中国石油天然气股份有限公司 | Sidetracked well oil extraction device |
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| CN112916528A (en) * | 2021-02-08 | 2021-06-08 | 宁夏振盐鑫盛通工贸有限公司 | A airtight belt cleaning device for oil-water well is restoreed and is maintained |
| CN112916528B (en) * | 2021-02-08 | 2023-02-28 | 宁夏振盐鑫盛通工贸有限公司 | A airtight belt cleaning device for oil-water well is restoreed and is maintained |
| CN113445955A (en) * | 2021-08-09 | 2021-09-28 | 湖北福瑞得能源科技有限公司 | Multifunctional intelligent oil well hot washing stratum protector and working method thereof |
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Application publication date: 20140924 |