CN202954964U - Reversal valve of hydraulic piston pump - Google Patents
Reversal valve of hydraulic piston pump Download PDFInfo
- Publication number
- CN202954964U CN202954964U CN 201220683603 CN201220683603U CN202954964U CN 202954964 U CN202954964 U CN 202954964U CN 201220683603 CN201220683603 CN 201220683603 CN 201220683603 U CN201220683603 U CN 201220683603U CN 202954964 U CN202954964 U CN 202954964U
- Authority
- CN
- China
- Prior art keywords
- piston pump
- hydraulic piston
- seal
- reversal valve
- selector valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model discloses a reversal valve of a hydraulic piston pump, wherein a kinematic pair in the reversal valve of the hydraulic piston pump is provided with a combination sealing element. The technical characteristics of the reversal valve provided by the utility model is as follows: all the moving fitting pieces of the reversal valve of the hydraulic piston pump all adopt the combined seal of glyd ring and step seal to seal. The reversal valve provided by the utility model solves the problem of dynamic seal when the hydraulic piston pump uses water as a motive power media, the power media utilized by the hydraulic piston pump is diversified, the operation of the reversal valve is stable, and the dynamic seal effect is more reliable. The advantage of a water-related affair piston pump is fully displayed, the reversal valve is widely applied to an oil field so as to replace the walking beam pumping unit, and the service life of the sealing element of the reversal valve is greatly prolonged.
Description
Technical field
The kinematic pair that the utility model relates to a kind of selector valve of hydraulic piston pump, particularly a kind of selector valve adopts dynamic seal (packing), is applied to the pump hydraulic piston pump selector valve that uses water as power fluid of operation of oil field.
Background technique
Hydraulic pump system is a kind of hydraulicdriven without bar pumping equipment, a kind of for the equipment from underground deep hole extraction oil, it is by the Surface power drive pump power fluid supercharging to be pumped into the down-hole by oil pipe or designated lane to drive piston and selector valve in the oil cylinder, the realization hydraulic motor is done and is pumped, carrying out the pump of swabbing operation by the down-hole plunger pump, is a kind of special equipment of deeply taking out.Hydraulic pump system is comprised of down-hole part, above ground portion and intermediate portion, and wherein intermediate portion refers to the power fluid pipeline and by the liquid of pumping and weary power fluid conveyance conduit; Above ground portion is comprised of kinetic pump, control valve and power fluid processing equipment, is used for supplying with and processing power fluid; Down-hole part hydraulic piston pump is the main body of hydraulic pump system, and the utility model relates to hydraulic piston pump key element selector valve.
The hydraulic piston pump oil pumping is one of major way of oil extraction in oil field use, says on its working method stricti jurise to belong to the hydraulic applications field that the pressure of its working medium is up to tens MPa.The hydraulic power of hydraulic piston pump is on ground, the working end of hydraulic piston pump is then in the down-hole of several kms, the hydraulic piston pump structure is with hydraulic drive hydraulic reciprocating motor, the oil pumping of realization plunger pump, hydraulic reciprocating motor core component is selector valve, it uses hydraulic drive, the to-and-fro motion of control hydraulic reciprocating motor.Selector valve control high low pressure liquid flows in order, and selector valve frequent flexible motion when work remains on that moving surface can not have leakage under the high pressure conditions while again.The selector valve of prior art hydraulic piston pump is the clearance seal that adopts rigidity, namely between kinematic pair, keep suitable gap, to guarantee that it can flexible motion, avoid simultaneously dynamic medium to leak from movement clearance, under the high pressure conditions selector valve pair clearance there is extremely strict requirement.Because common hydraulic system is with the oil medium that is used as power, the viscosity of hydraulic oil is large, and greasy property is good, can satisfy under condition of high voltage can normal flexible motion simultaneously moving surface leak very little usage requirement.Simultaneously, because frequently moving selector valve for a long time, the lubrication protection effect of oil film do not produce undue wear.For example the matching gap by relevant demand of technical standard hydraulic piston pump is 0.005mm, and this is a matching gap that requirement on machining accuracy is high.Can ensure the normal operation of hydraulic piston pump selector valve when in the prior art with oil as working medium being fully.But hydraulic piston pump selector valve traditional when using water as dynamic medium can not satisfy real requirement, because the viscosity of water is very little, mobile fine, its surface tension sharply reduces under the high temperature condition of down-hole, the mobile reinforcement, so that seepage is serious under condition of high voltage.In addition, when adopting water as the hydraulic piston pump working medium, under the moving condition that commutates frequently, the greasy property of water is very limited, cause selector valve fitting surface serious wear, during actual motion when seal clearance increases to 0.1 millimeter because of wearing and tearing selector valve cisco unity malfunction just.The operating life of selector valve is very short when take water as working medium, just can't not satisfy for a long time the condition of Spielpassung in operation.Still do not reach real requirement after having used various anti abrasive processing methods in the prior art.Therefore common hydraulic piston pump can't make the water liquid that is used as power.The oil that the hydraulic piston pump of practical application adopts the down-hole to draw up to come the more liquid that is used as power perhaps uses additivated water base power fluid to make hydraulic piston pump high voltage power medium, has increased substantially the equipment operating cost with these dynamic mediums.In addition, the critical component selector valve of hydraulic piston pump oil well small-medium size, high pressure, lubricating condition is bad and frequent moving condition under rate of fault high, the life-span short, under tens MPa high pressure, require the selector valve no leakage high dynamic fit gap to be arranged at a plurality of Spielpassung faces, to machining and the high requirement of wear-resistant proposition, therefore cause the characteristics that equipment price is high, operating cost is high, the life-span is short, greatly limited the application of hydraulic piston pump.Recover the oil regional hydraulic piston oil well pump because specific service condition wishes that all water is as dynamic medium, but this need to solve the problem that hydraulic piston pump uses water as movingly face sealing of power fluid, should solve the motive sealing of water under the condition of high voltage, will under the prerequisite of motive sealing, make simultaneously motive sealing that certain wear-resistant ability is arranged.The various technology that adopt on the hydraulic piston pump oil production equipment up to now still can't address these problems.
The hydraulic piston oil well pump is a kind of desirable oil-pumping equipment in oil field from the principle, has the efficient height, the pumping degree of depth is dark, saves sucker rod, is suitable for the series of advantages such as horizontal well, deflecting well oil withdrawal.But the hydraulic piston pumping unit exists, and price is high, operating cost is high, the short deficiency of the normal service life of equipment, and these problems have limited the application of hydraulic piston pump in the oil pumping in oil fields operation greatly.As enter 21 century, the most of oil field of China has been in development late stage, the oil field fluid supply capacity is obviously not enough, water content constantly increases in the production fluid, it is bad that the operating mode of the hydraulic piston pump take oil as power fluid becomes, with hydraulic piston pump recover the oil to become more difficult, finally hydraulic piston pump withdraws from normal use at home.
Under the Exploitation Depth and the continuous situation about enlarging of range in oil field, oil exploration equipment is had higher requirement.Pumping unit performance and people's expected value have than big difference at present, improving the pumping unit performance is global scientific research task, the working principle and methods for using them of pumping unit does not have large breakthrough in considerable time in the past, technical performance is only at the subrange improvement and perfection, domestic pumping unit mainly is the imitated external product that improves of enterprise, because enterprise is numerous, lack main product, with external product larger gap is arranged still.Oil production equipment commonly used is still the conventional low beam pumping unit of pumping efficiency at present, although taked various measures, but still can't solve the problem of conventional beam-pumping unit inefficiency, this kind equipment occupies main status in field of petroleum exploitation, statistics shows that sucker rod pumping method proportion in the petroleum production of China is 90%-97%.
For many years expert call solves the deficiency of hydraulic piston pump technically, gives full play to the advantage of hydraulic piston pump high technology performance to adapt to the demand of oil field development.Although the expert proposes a lot of solutions, water is best solution as hydraulic piston pump operation power medium directly, finds the technology that can directly use water as the selector valve of power fluid, is present stage to be badly in need of a technical solution difficult problem.
Summary of the invention
The utility model provides a kind of can overcome the prior art deficiency, can improve hydraulic piston pump kinematic pair sealing effect, can reduce hydraulic piston pump requirement on machining accuracy, material requirement, can satisfy simultaneously under the condition of high voltage water as the hydraulic piston pump selector valve of power fluid.
The method of carrying out dynamic seal (packing) between the kinematic pair of the hydraulic piston pump selector valve that uses water as power fluid of the present utility model is that all of selector valve are all adopted combination seal movingly between part, namely adopts and selects lattice to enclose or/and this special this class combination seal of envelope seals.
Combination seal to the axle motive sealing between the kinematic pair of hydraulic piston pump selector valve of the present utility model is this special envelope, and the combination seal that is used for the hole motive sealing is that lattice enclose; The combination seal that perhaps is used for the axle motive sealing is that axle encloses with lattice, and the combination seal that is used for the hole motive sealing is that the hole is enclosed with lattice.
Adopt method hydraulic piston pump selector valve of the present utility model, comprise: guiding valve, valve pocket, piston, the piston rod that reversing groove is arranged up and down is equipped with all at all movingly faces of the movingly face of movingly face, guiding valve and the piston rod of guiding valve and valve pocket in the hydraulic piston pump selector valve of the present utility model that lattice enclose or seal combination Sealing of this special envelope.
Hydraulic piston pump selector valve of the present utility model, comprise: guiding valve, valve pocket, piston, the piston rod that reversing groove is arranged up and down, and be installed in combination seal on guiding valve and the valve pocket, and it is characterized in that being arranged at the combination seal that is used for the axle motive sealing on piston, guiding valve and the valve pocket and be this special envelope, be used for enclosing for lattice of hole motive sealing.
Hydraulic piston pump selector valve of the present utility model, comprise: guiding valve, valve pocket, piston, the piston rod that reversing groove is arranged up and down, hydraulic piston pump selector valve of the present utility model is that axle encloses with lattice at the combination seal that piston, guiding valve and valve pocket are used for the axle motive sealing, and the combination seal that is used for the hole motive sealing is that the hole is enclosed with lattice.
Above-mentioned hydraulic piston pump selector valve of the present utility model can directly improve on existing hydraulic piston pump structure of reversing valve basis and realize, also can realize at the selector valve that is designed to new structure.
The utility model well solves the professional difficult problem that prior art exists from working principle, practical structures to the actual tests effect, make water and directly made the high-performance waterpower piston oil pumping complete sets of equipment of high voltage power liquid, realized hydraulic piston pump truly.The utility model method can solve under the condition of high voltage effectively with the problem of water as the secondary sealing of dynamic medium hydraulic system kinetic friction, the secondary wearing and tearing of kinetic friction and life problems, and these are the hydraulic piston pump prior art midium or long term problem that is difficult to solve just.
Crucial part of the present utility model is that all motive sealings of traditional hydraulic piston pump selector valve are changed into the contact sealing of flexible structure by the clearance seal of rigid construction, is also referred to as material seal.Concrete technological scheme is exactly that the combination seal-lattice that install the motive sealing superior performance additional enclose or this special combination seal that seals class.
Lattice enclose the hydraulic seal device that occurs for the later stage in last century with this special envelope, and they are by formed the O shape circle that elastomer is wherein generally made with the nitrile rubber of standard, or the seal ring of the seal ring of X-shaped or rectangle by elastomer and packing ring combination; Seal ring then is to have adopted to be filled with the fluoroplastic that bronze or molybdenum disulfide or graphite or charcoal fiber etc. mix, and the tubular blank after fixed is shaped through machining again.Seal ring is a kind of material of very antifriction, has under extremely harsh condition, still can keep high rigidity, and have the ability that resists all chemical substances, and its moisture absorption is less than 0.01%, and friction factor is low, static friction coefficient and the coefficient of kinetic friction are very approaching, are difficult for occuring creeping phenomenon in the use.The O shape circle with favorable elasticity, with the packing ring combination of excellence together, consist of combination seal, the most frequently used form of combination seal is that lattice enclose and this special envelope.O shape circle wherein also applies radial equipartition pressure to seal ring except the effect of performance static seal, make seal ring bring into play its excellent seal action; Seal ring has then been born the motive sealing effect.Like this, combined seal ring make above-mentioned both maximize favourable factors and minimize unfavourable ones, formed best collocation, bring into play separately its advantage.Lattice enclose the general sealing that is used for cylinder hole and piston space, are two way sealeds; And this special envelope is multiplex in piston rod, is one-way sealing, for further improving its sealing effect, so be designed to stepped shaft more; Two lattice of tandem arrangement enclose or during this special envelope, can realize zero leakage.Foremost business registration name is called Te Kang in the seal ring.
The utility model encloses with this special envelope the pump line in the hydraulic piston pump and piston space with lattice, between valve pocket and guiding valve, dynamic seal (packing) is carried out in gap between guiding valve and piston rod, employed seal ring can use the bronze powder that good lubrication is arranged under the aqueous medium environment, the composite material of carbon fiber and fluoroplastic, this can guarantee that hydraulic piston pump is can work well under the condition of power fluid at water, simultaneously because adopt lattice to enclose or/and this special stuffing box packing of this special envelope, can make between the kinematic pair of hydraulic piston pump larger movement clearance is arranged, like this can the decrease manufacture difficulty, reduce manufacture cost, can fully realize again simultaneously the zero leakage between kinematic pair, everything is that prior art can't realize fully.
Advantage of the present utility model:
1, hydraulic piston pump adopts hydraulic principle work; selector valve frequently switches the high low pressure path; pressure reduction is up to tens MPa; sealing is kept in annular space gap with valve pocket and guiding valve; usually the axial length of annular space is very little; make leakage rate satisfy usage requirement; seal clearance must be very little; with hydraulic oil or the oil liquid that is used as power; because power fluid viscosity and greasy property are good; can form oil film in seal clearance, the friction pair of protection selector valve is not directly contact friction mutually, as long as guarantee that certain seal clearance just can satisfy usage requirement.It is just different to use the water liquid situation that is used as power instead, and water viscosity small flow is good, requires less gap just can make the leakage of high low pressure satisfy usage requirement.Also has the another one problem; water can not form complete film protection selector valve friction pair; greasy property is poor, will cause the direct contact friction of selector valve friction pair, and the wearing and tearing that form under kinetic friction frequently will strengthen seal clearance; the gap is arrived to a certain degree greatly; the viscous resistance that is formed by water surface tension will reduce, and high pressure will make leakage rate sharply increase, and the current that leak simultaneously at a high speed are with the erosion corrosion valve body that commutates; wearing clearance is further strengthened, form vicious circle.Using water as power fluid under the high pressure conditions, adopt gap sealed structure of reversing valve, also is very difficult even if modern technologies implement.
The utility model has solved the problem of dynamic seal (packing) when hydraulic piston pump makes water be used as power medium, having jumped out traditional hydraulic piston pump selector valve improves machining accuracy, restructures, selects the mill material under rigidity clearance seal condition, the vicious circle that structure changes more complicated and more complicated can increase substantially the practicability of hydraulic piston pump.The method designs simplification makes the simple of processing change, cost decrease.Designs simplification is so that working procedure is more rational, and rate of fault reduces the life-span increase.Designs simplification is so that maintenance is convenient in easy installation and removal.
2, the utility model selector valve operating mechanism is reliable and stable, on using, the selector valve life-span will be far above piston life, because both the combination seal lattice with the motive sealing superior performance enclose as sealing means, selector valve and piston be repeatedly commutation motion all, but the distance of selector valve operation and time are more than the weak point of piston, so the selector valve life-span is more than what grow with piston.Tradition hydraulic piston pump piston also adopts the mode of contact sealing because sealing surface is short, and the life-span of piston generally is not problem, and the utility model selector valve life problems should more not be problem thus.Moreover combination seal is the low value standard piece, and replacement cost is very low, and it is convenient especially again that the on-the-spot landing pump housing is changed, so fundamentally overcome the crucial not enough of traditional hydraulic piston pump.
3, many dynamic mediums use, the utility model uses the dynamic medium diversification, bring great convenience to use, just can be used as high voltage power liquid behind the ordinary water filtering particle impurity, and this power fluid preparation cost is very low, down-hole sewage, surface water simple filtration all can directly be used, seawater and the strong water of other corrosivity can be desalinated rear application, desalinating cost is very low at present, moreover selector valve is through simple process, such as ways such as edge titanium alloy covers, just can increase substantially anti-corrosion capacity, even can be directly with the seawater liquid that is used as power.Be used as power liquid with the liquid generated underground simple process can decrease operating cost, improves practicability.
4, at present the main flow pumping unit in oil field is the pumping unit of slide beam, and the pumping unit of slide beam exists that efficient is low, equipment is heavy, poor controllability, be not suitable for a series of deficiencies such as inclined shaft and horizontal well oil pumping, restricted by working principle, and is can room for improvement little.The hydraulic piston pump efficiency is high in contrast, and lightweight, the pumping degree of depth is dark, can take out viscous crude in horizontal well, inclined shaft, ocean environment oil pumping, and controllability is good, and basic mechanical design feature is superior.But there is the deficiency that price is high, rate of fault is high, the life-span is short, operating cost is high, limited being widely used.Reason mainly is the selector valve restraining factors, but the cost of the utility model decrease hydraulic piston pump increase the service life, reduce operating cost, fundamentally break the bottleneck that hydraulic piston pump uses.The utility model satisfies the oil field to the demand of high-performance pumping equipment, will promote from many aspects the pumping unit technical order, meets domestic and international technology trends, wades out a new road for improving the oil pumping in oil fields effect.
Respond well according to the hydraulic piston pump sample ground experiment that the utility model principle is made, it is reliable to operate steadily, and is used as power with water and tests under the environment of liquid, moves more than 100 hour, the be invisible to the naked eye vestige of wearing and tearing of selector valve Sealing.
Description of drawings
Accompanying drawing 1 is a kind of existing hydraulic piston pump structural representation that has adopted method of the present utility model.Accompanying drawing 2 is I part partial enlarged drawing among Fig. 1.
Among the figure:
1, is the upper piston upper cylinder half; 2, upper piston; 3, cylinder under the upper piston; 4, the hydraulic piston pump housing and oil well casing annular space; 5, upper pumping cylinder inflow pipeline; 6, upper reversing groove; 7, hole; 8, selector valve; 9, combination seal (Ge Laiquan); 10, hole; 11, hole; 12, lower reversing groove; 13, lower piston; 14, cylinder under the lower piston; 15, lower piston upper cylinder half; 16, seal ring; 17, this special envelope; 18, spool; 19, hole; 20, hole; 21, hole.
Embodiment
The utility model is below in conjunction with description of drawings.
Accompanying drawing 1 is a kind of schematic representation of hydraulic piston pump structure of reversing valve commonly used, the E type hydraulic piston pump of U.S. KEBO company adopts this structure, the producer of domestic unique production hydraulic piston pump, the hydraulic piston pump selector valve that Shengli Oil Field rodless pump Co., Ltd produces all is this type.All be separated by with the gap between each parts that mutually move in its structure in the prior art.Structure of the present utility model is unlike the prior art, is provided with this special envelope or lattice between each parts that mutually move and encloses the part that namely represents with the black lattice in the structure that Fig. 1 shows.
Working principle of the present utility model is: when selector valve 8 was in upper limit position, high voltage power liquid entered the upper-end surface of lower piston, and the piston group is descending, and upper pump end sucks, and lower pump end is discharged; When the piston group runs to the limit inferior position, upper reversing groove on the piston pulling rod is communicated with hole 11 and hole 10, the low pressure in hole 11 is connected to the bottom of selector valve by hole 10, and this moment, high pressure was born on the selector valve top, and selector valve moves to the lower position under the effect of difference force.This moment, high voltage power liquid entered cylinder under the upper piston by hole 7, and the commutation of piston group is up, did the lean liquor of merit in the lower piston upper cylinder half and discharged by hole 20, and upper pump end begins to discharge, and lower pump end sucks.In this course when the piston group moves upward near the limes superiors position, high voltage power liquid is communicated to the selector valve bottom by lower reversing groove, the hole 10 of pull bar bottom with high voltage power liquid, selector valve top and bottom while this moment elevated pressure, but the top and bottom sectional area is different large, the bottom is large, pressure reduction will make selector valve move to the limes superiors position, the piston group begins again downward movement, iterative cycles like this, the hydraulic reciprocating motor that forms the up and down stratum production fluid of pump end is alternately shifted pump, sleeve pipe annular space successively onto, and transports to ground through well head.
Motive sealing sealability and application life problem when the purpose of this utility model is to solve selector valve and uses water as dynamic medium, therefore select the most common structure of reversing valve, clearance seal with rigidity is changed to flexible material contact sealing on its basis, method be exactly on therein the motive sealing fitting surface fluting install combination seal additional, can see that on figure three fitting surfaces of selector valve have loaded onto Ge Laiquan, two fitting surfaces are contained on the selector valve, and another fitting surface is contained on the spool.Also installed in addition this special envelope on the movingly face of piston rod additional, same purpose also is in order to strengthen the motive sealing performance, and piston movingly face installs Ge Laiquan usually additional.
Lattice enclose, this special envelope is two kinds of forms of combination seal, and typical running parameter is:
Nominal Maximum operating pressure: 63MPa;
Applicable working medium: oil, emulsified liquid, water;
Highest movement speed: 6M/ second
Operating temperature :-30---200C
O
The combination seal form is a lot, also have axle with lattice enclose, right-angle array sealing, pin shape combination seal, C shape combination seal, Y shape combination seal, hat combination seal, triangle combination sealing, V-arrangement combination seal, general plug seal (tetrafluoro is spring sealed), profile of tooth combination seal, stepped shaft combination seal etc.Be applicable to respectively different application targets, strengthen the using effect of some technical orders.Filling-modified teflon has super antiwear characteristic as the contact sealing material, and friction factor is little, and suitable water is lubricated.Difference according to filling-modified material can be applied to oil, emulsified liquid, water medium, or be specifically applied to oil or water Single Medium.O shape circle under the condition that plays the static seal effect, also to teflon inner face transmission of pressure, guarantees the sealing effect of motive sealing face as the static seal member.
Document announcement is arranged, enclose under the condition of 150 kilometers of operations with lattice, lattice enclose the sealability that also keeps good, the every commutation of hydraulic piston pump selector valve of the utility model design 2cm that once moves, commutation in per 4 seconds once, by this calculating, 1 year range ability of selector valve work of the present utility model is about 150 kilometers, that is to say and adopt the hydraulic piston pump selector valve of the utility model method can normally move more than 1 year at least, and the domestic existing hydraulic piston pump that uses is normally changed the average time of easily damaged parts only as about January.
The utility model is take the hydraulic piston pump selector valve of maturation as example, solve water conservancy project and make selector valve motive sealing performance under the ambient condition, purpose is the popularity in order to illustrate that this method is applicable, if redesign hydraulic piston pump, on the basis of this technology, can make design convenient effectively, further promote the overall technique performance index of hydraulic piston pump, such as many many pumping cylinders of hydraulic motor structures, make oil recovery technique obtain large breakthrough.
Claims (3)
1. hydraulic piston pump selector valve, comprise: guiding valve, valve pocket, piston, the piston rod that reversing groove is arranged up and down is characterized in that all movingly faces at the movingly face of movingly face, guiding valve and the piston rod of guiding valve and valve pocket are equipped with all that lattice enclose or seal combination Sealing of this special envelope.
2. hydraulic piston pump selector valve according to claim 1 is characterized in that being arranged at the combination seal that is used for the axle motive sealing on piston, guiding valve and the valve pocket and is this special envelope, is used for enclosing for lattice of hole motive sealing.
3. adopt the hydraulic piston pump selector valve of the described method of claim 2, comprise: guiding valve, valve pocket, piston, the piston rod that reversing groove is arranged up and down, it is characterized in that being arranged at the combination seal that is used for the axle motive sealing on piston, guiding valve and the valve pocket is that axle encloses with lattice, and the combination seal that is used for the hole motive sealing is that the hole is enclosed with lattice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220683603 CN202954964U (en) | 2012-12-12 | 2012-12-12 | Reversal valve of hydraulic piston pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220683603 CN202954964U (en) | 2012-12-12 | 2012-12-12 | Reversal valve of hydraulic piston pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202954964U true CN202954964U (en) | 2013-05-29 |
Family
ID=48460540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220683603 Expired - Fee Related CN202954964U (en) | 2012-12-12 | 2012-12-12 | Reversal valve of hydraulic piston pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202954964U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593834A (en) * | 2016-12-13 | 2017-04-26 | 大连凯泓科技有限公司 | Fluid sealed pump used for oil treatment |
-
2012
- 2012-12-12 CN CN 201220683603 patent/CN202954964U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593834A (en) * | 2016-12-13 | 2017-04-26 | 大连凯泓科技有限公司 | Fluid sealed pump used for oil treatment |
| CN106593834B (en) * | 2016-12-13 | 2018-05-22 | 大连凯泓科技有限公司 | It is pumped for the Fluid Sealing of oil processing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103615385B (en) | A kind of detachable hydraulic swash plate pump plunger piston slippery boots assembly | |
| CN108625783B (en) | Auxiliary rock breaking tool for underground pressurization | |
| CN102979716A (en) | Reversing valve of hydraulic piston pump | |
| CN101526079A (en) | Multifunctional oil-extraction and gas-injection integrated oil well pump for sanding heavy crude oil well | |
| CN201896729U (en) | Gas-proof load-reducing deep well defueling pump | |
| CN202954964U (en) | Reversal valve of hydraulic piston pump | |
| CN203214284U (en) | Tubing liner pump for scraping sand and pumping heavy oil | |
| CN208718914U (en) | Reciprocating rotation screw pump based on the driving of sucker rod pumping bar | |
| CN204419560U (en) | Long-plunger note adopts integral type antiscale pump | |
| CN2811599Y (en) | Hydraulic self-sealing plunger oil-well pump | |
| CN100385120C (en) | Hydraulic self-sealed plunger oil-well pump | |
| CN202467782U (en) | Electromagnetic anti-wax oil production device | |
| CN202251956U (en) | Floating gap seal with high speed, high frequency and high abrasion resistance | |
| CN1056436C (en) | Multiple-range oil-well pump | |
| CN201184171Y (en) | Bias-wearing-proof pumping unit | |
| CN102425396A (en) | Sucker-rod pump oil extraction system for oil well | |
| CN206477989U (en) | Oil well, which recovers the oil, lifts double-acting vane pump | |
| CN201228628Y (en) | Anti-blocking low friction resistance seal pumping effect booster | |
| CN104935104A (en) | Pressure compensation type submersible motor system | |
| CN206655858U (en) | A kind of low abrasion hydraulic transmission | |
| CN201165969Y (en) | PG pump hydraulic end leakage-free packer | |
| CN203499965U (en) | Double-layer self-sealing overlength stroke oil well pump | |
| CN2391027Y (en) | Efficient sandproof barrel oil well pump plunger | |
| CN201155448Y (en) | External valve type hydraulic self-sealing plunger oil pump | |
| CN204366860U (en) | Plunger displacement pump Quick-disassembling tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20151212 |
|
| EXPY | Termination of patent right or utility model |