CN101469700A - External valve type hydraulic self-sealing plunger oil-well pump - Google Patents
External valve type hydraulic self-sealing plunger oil-well pump Download PDFInfo
- Publication number
- CN101469700A CN101469700A CNA2007103039747A CN200710303974A CN101469700A CN 101469700 A CN101469700 A CN 101469700A CN A2007103039747 A CNA2007103039747 A CN A2007103039747A CN 200710303974 A CN200710303974 A CN 200710303974A CN 101469700 A CN101469700 A CN 101469700A
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- Prior art keywords
- valve
- pump
- plunger
- pump barrel
- type hydraulic
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- 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.)
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- 238000007789 sealing Methods 0.000 title claims abstract description 28
- 239000003129 oil well Substances 0.000 title claims description 34
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 238000011010 flushing procedure Methods 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 230000002262 irrigation Effects 0.000 description 3
- 238000003973 irrigation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1207—Machines, pumps, or pumping installations having flexible working members having peristaltic action the actuating element being a swash plate
Abstract
The present invention provides a external valve hydraulic pressure self-sealing plunger piston traveling valve oil pump, which mainly includes a traveling valve, a plunger piston, a pump barrel and a fixed valve, wherein the fixed valve is fixedly mounted on the lower part of the pump barrel; the traveling valve id disposed on the upper part of the external part of the plunger piston, and the fixed valve on the lower part of the pump barrel connects with a fixed locking support that inserted into a locking support seat; a lift-up mechanism can pull the pump out of the well; a sub-cavity bridge connector and a backwash valve are set to form two private channel of oil pumping and cleaning so as to make pump detection and cleaning operation more convenient, and reduces production cost. The pump is provided with high efficiency, small diameter and friction, long service life, convenient operation and no pollution.
Description
Technical field:
The invention belongs to petroleum production machinery lifting field, be specifically related to the plunger oil-well pump of pumping unit, but be a kind of small plunger footpath, hydraulic plunger oil well pump with self-styled function.
Background technique:
At present, it is one of traditional artificial lifting way of World Oil Industry that the oil pumping of bar plunger pump is arranged, and also is prevailing up to now artificial lift mode.The phase I of sucker-rod pumping technical development is the bush type plunger pump, and second stage is whole cartridge type plunger pump, a large amount of at present these modes that adopt.And the conventional plunger pump exists problems such as frictional resistance is big, efficient is low, operation complexity, the straightness accuracy that its main cause is a metal plunger with pump barrel exists causes with ellipticity error and cooperates interference, especially pump is used to contain conflux body, viscous crude and contains solid phase particle and have bigger surface friction drag more for a long time, along with gap smaller and polymer concentration become big, it is big that axial pressure becomes, produce lateral force, cause bar, canal curvature, effective stroke shortening, the pump efficiency of pump are reduced, finally cause bar, pipe to rub partially to break and leak harmful effects such as pump overhaul period shortening.Can only trip out roofbolt or tubing string by operation when fixing a breakdown, increase the cost of oil extraction.
On the other hand, the present plunger pump that generally uses, travelling valve (valve) are by being threaded in the plunger, and with the plunger one relative pump barrel motion in the pump barrel that coexists, so pump is directly bigger, is not suitable for the hole condition in minor diameter, little discharge capacity.
Summary of the invention:
The purpose of this invention is to provide a kind of external valve type hydraulic self-sealing plunger oil-well pump, make in its well that is applicable to minor diameter, little discharge capacity, and can solve problems such as conventional plunger pump frictional resistance is big, the big efficient of Theoretical flowing capacity is low, operation complexity.
External valve type hydraulic self-sealing plunger oil-well pump of the present invention mainly comprises travelling valve, plunger, pump barrel and standing valve, and wherein: described standing valve is fixedly connected on the bottom of pump barrel, and travelling valve places the plunger exterior upper.
Above-described external valve type hydraulic self-sealing plunger oil-well pump, wherein, the standing valve of described pump barrel bottom connects fixing and locking supporting, and described fixing and locking supporting is plugged in the locking supporting base.
Described pump barrel upper end is provided with one group of scalable boss, and the bottom of plunger is provided with the groove that stretches into for scalable boss, and the in good time joint of the two has formed the shift mechanism of pump being pulled out ground.
Above-described external valve type hydraulic self-sealing plunger oil-well pump, wherein, if an outer coaxial tube is sheathed on outside travelling valve, plunger, pump barrel, standing valve or fixing and locking supporting and the locking supporting base, and connect one fen chamber gap bridge joint under described standing valve or locking supporting base, it establishes perforate in described outer tube outside and be communicated with fixing and locking supporting, standing valve, pump barrel, plunger, travelling valve and form the passage of pumping.
Above-described external valve type hydraulic self-sealing plunger oil-well pump, wherein, inside, described outer tube lower end is installed with a backwash valve, the fixedly connected outer tube wall of the valve seat of backwash valve, the bottom through-hole of valve seat is communicated with the outer tube bottommost, and the top through hole of valve seat is communicated with the flushing chamber of outer tube and the formation of branch chamber gap bridge joint and the cavity between outer tube and the pump barrel and forms the flushing designated lane.
Above-described external valve type hydraulic self-sealing plunger oil-well pump, wherein, described pump barrel is established seal section, but seal section is provided with the seal section shell of conducting pressure, and an elastic telescopic cover is housed in the shell, and closed assembly has a plurality of wear-resisting seal rings in elastic telescopic cover the inside.
Adopt above design, oil well pump of the present invention is external with valve (valve), has reduced the pump footpath effectively, makes this new pump be applicable to that more small hole diameter, the output of borehole size between Φ 34.9mm to Φ 50.8mm is 0.5m
3/ d to 1m
3The hole condition of the little discharge capacity of/d.The standing valve of the pump barrel of this pump and pump barrel bottom is plugged in the locking supporting base by the fixing and locking supporting, by the to-and-fro motion of plunger in pump barrel (but also non-movable piston as required, make the pump barrel to-and-fro motion) realize the variation of pump volume, thus carry out imbibition and discharge opeing.By housing, elastic sleeve, three layers of pump barrel seal section that constitutes of seal ring, utilize the function of its hydraulic pressure self-sealing, make the up stroke of pump not have leakage, down stroke does not have frictional resistance.The joint of the scalable boss that groove that pump plunger is provided with and pump barrel are provided with can be implemented the inspection pump in the ground of pulling out that oil well pump is convenient and reliable.Be provided with a branch chamber gap bridge joint in the bottom of oil well pump, make pump form oil pumping, two designated lanes of flushing, this design makes the flushing operation totally thorough, has effectively prolonged the oil well pump inaction interval, has reduced cost for oil production.
Description of drawings:
Fig. 1 is external valve type hydraulic self-sealing plunger pump structure figure of the present invention;
Fig. 2 is the partial enlarged drawing of seal section pump barrel among Fig. 1;
Fig. 3 is an external valve type hydraulic self-sealing plunger oil-well pump work schematic representation of the present invention;
Among the figure: 1. sucker rod, 2. travelling valve (valve), 34. plunger grooves, 3. plunger, 4. pump barrel seal section, 41. seal section housings, 42. elastic telescopic covers, 43. seal rings, 44. scalable boss, 5. pump barrel, 6. standing valve (valve), 7. fixing and locking supporting, 8. locking supporting base, 9. minute chamber gap bridge joint, 91. horizontal holes, 92. upright openings, 10. backwash valve, 11. outer tubes, 12. sleeve pipes.
Embodiment:
By shown in Figure 1, similar with existing oil well pump, external valve type hydraulic self-sealing plunger oil-well pump of the present invention is equipped with sucker rod 1, travelling valve 2 from top to bottom successively and places plunger 3 in the pump barrel 5; Different with existing oil well pump is:
A seal section 4 is established on pump barrel 5 tops, fixedly connected standing valve 6 in bottom and fixing and locking supporting 7, and fixing and locking supporting 7 is plugged in 8 li of locking supporting bases, establishes the passage that communicates with standing valve 6 in the middle of the fixing and locking supporting 7;
The fixedly connected one minute chamber gap bridge joint 9 in locking supporting base 8 lower ends, branch chamber gap bridge joint 9 has horizontal hole 91 and the upright opening 92 that is interconnected, and upright opening 92 supports 7 middle channel connections with fixing and locking;
If an outer tube 11 is as cleaning hose or oil pipe, this outer tube 11 is set in outside the above each parts, and connects with a minute side of chamber gap bridge joint 9, and outer tube 11 sidewalls are offered a through hole with horizontal hole 91 relative positions of branch chamber gap bridge joint 9; Outer tube 11 and other are sheathed on and leave the gap between wherein the parts and form irrigation channel; The bottom of outer tube 11 is installed with a backwash valve 10, valve seat 13 fixedly connected outer tube 11 sidewalls of backwash valve 10, and the bottom through-hole of valve seat 13 is communicated with outer tube 11 bottommosts, and the top through hole of valve seat 13 is communicated with outer tube 11 and the flushing chamber of dividing chamber gap bridge joint 9 to form.
Adopt above the design, the present invention places standing valve (valve) 6 outside reciprocating plunger 3, the pump barrel 5, can subtract small pump diameter effectively.
In optimized project of the present invention, for reaching the hydraulic pressure self-sealing function of oil well pump, the seal section 4 of pump barrel 5 has adopted optimal design, and referring to shown in Figure 2, but seal section 4 is provided with the seal section shell 41 of conducting pressure, an elastic telescopic cover 42 is housed in the shell, closed assembly has several wear-resisting seal rings 43 in elastic telescopic cover the inside, because the effect of seal section 4 inside and outside differential pressures, pump is when upstroke, sealing section 4 forms driving fit with plunger 3, realizes zero leakage; Then there is the gap during down stroke, no frictional resistance with plunger 3.Seal section 4 parts also can be referring to the design of describing in another patent 200520112641.2 of inventor.
In another optimized project of the present invention, for being pulled out ground, overhauls by oil well pump, as shown in Figure 1, pump barrel seal section 4 is provided with one group of scalable boss 44, and the bottom of plunger 3 is provided with the groove 34 that stretches into for scalable boss 44, when sucker rod 1 lifts plunger 3 upwards the time, groove 34 walks to scalable boss 44 positions and telescope tab 44 is inserted in the groove 34, thereby plunger 3 is connected with pump barrel 5, draw sucker rod 1 in the reinforcing this moment again, the fixing and locking supporting 7 of fixedlying connected with pump barrel 5 is thrown off from locking supporting base 8, thereby the oil well pump upper component is pulled out ground.
Go back in the optimized project in the present invention, set up oil pumping passage and flushing channel separately.Referring to shown in Figure 3, an axial more sheathed sleeve pipe 12 outside outer tube (being cleaning hose/oil pipe) 11, sleeve pipe 12 leaves the gap with outer tube 11 and forms the well-flushing passage.The horizontal hole 91 of set minute chamber gap bridge joint 9 and upright opening 92 upwards are communicated with fixing and locking successively and support 7 passages, standing valve 6, pump barrel 5, plunger 3, travelling valve 2 and form an oil pumping passage; And the cavity of the periphery of well-flushing passage, backwash valve 10, branch chamber gap bridge joint 9 and outer tube 11, outer tube 11 and the wherein inner cavity of installing between the parts (as pump barrel 5) are connected to form irrigation channel.During oil pumping, backwash valve 10 cuts out, and then liquid is promoted to ground by the oil pumping passage; During well-flushing, highly pressurised liquid injects the down-hole and enters the chamber, the end of outer tube 11 through the well-flushing passage, backs down flushing valve 10 and enters irrigation channel, and the heavy what thing in the oil well pump is washed, and after outer tube 11 returns ground, finishes the flushing operation.
More than multiple optimal design can be used in combination or use separately, therefore, oil well pump of the present invention can be made the variation of multiple enforcement, does not enumerate one by one for this reason at this.
Adopt above design, the present invention reaches following useful effect:
This external valve type hydraulic self-sealing plunger oil-well pump adopts such scheme, first standing valve (valve) is placed outside reciprocating plunger, the pump barrel, can effectively subtract small pump diameter, make oil well pump of the present invention be applicable to that more little hole diameter, the output of well size between Φ 34.9mm to Φ 50.8mm is 0.5m3/ d to 1m3The hole condition of the little discharge capacity of/d. The new pump that has realized at present directly is domestic and international small pump diameter, and this technology reaches To domestic and international top standard.
Establish the sealing section on the pump barrel, high pressure outside the upstroke pump barrel chamber, elasticity shape takes place in the elastic telescopic cover of sealing section Become, form good sealing, wastage is tending towards zero, and lower stroke elastic telescopic cover recovers original state, gap gradually Become big, frictional resistance is tending towards zero, and the friction that upstroke is born is effective friction of bearing load, and it is right to have reduced The wearing and tearing of pump barrel, the service life that Special wear-resistant sealing ring has improved pump. Effectively stroke increase under the square one, Lower stroke does not have frictional resistance, reduces rod sag, increases effective stroke, and pump efficiency significantly improves.
During the inspection pump, groove, boss shift mechanism by plunger, pump barrel are provided with can draw oil well pump smoothly Go out ground, operation is convenient and strength-saving, pollution-free (when playing pump, but pump automatic leakage oil), reduce cost for oil production.
During well-flushing, inject high pressure liquid in sleeve pipe, high pressure liquid backs down backwash valve through the shaft bottom, Enter outer tube, return ground by outer tube, finish the flushing operation. The single-minded passage washing technology of this kind is clean Thoroughly, can reduce the operation number of times.
Claims (8)
1, a kind of external valve type hydraulic self-sealing plunger oil-well pump mainly comprises travelling valve, plunger, pump barrel and standing valve, it is characterized in that: described standing valve is fixedly connected on the bottom of pump barrel, and travelling valve places the plunger exterior upper.
2, external valve type hydraulic self-sealing plunger oil-well pump according to claim 1 is characterized in that: the standing valve of described pump barrel bottom connects fixing and locking supporting, and described fixing and locking supporting is plugged in the locking supporting base.
3, external valve type hydraulic self-sealing plunger oil-well pump according to claim 2, it is characterized in that: described pump barrel upper end is provided with one group of scalable boss, and the bottom of plunger is provided with the groove that stretches into for scalable boss, and the in good time joint of the two has formed the shift mechanism of pump being pulled out ground.
4, external valve type hydraulic self-sealing plunger oil-well pump according to claim 1, it is characterized in that: establish an outer coaxial tube and be sheathed on outside travelling valve, plunger, pump barrel, the standing valve, standing valve connects down one fen chamber gap bridge joint, and it establishes perforate in described outer tube outside and be communicated with outer fixing valve, pump barrel, plunger, travelling valve and form the passage of pumping.
5, external valve type hydraulic self-sealing plunger oil-well pump according to claim 3, it is characterized in that: establish an outer coaxial tube and be sheathed on outside travelling valve, plunger, pump barrel, standing valve, fixing and locking supporting and the locking supporting base, and described locking supporting base connects down one fen chamber gap bridge joint, and it establishes perforate in described outer tube outside and be communicated with fixing and locking supporting, standing valve, pump barrel, plunger, travelling valve and form the passage of pumping.
6, according to claim 4 or 5 described external valve type hydraulic self-sealing plunger oil-well pumps, it is characterized in that: inside, described outer tube lower end is installed with a backwash valve, the fixedly connected outer tube wall of the valve seat of backwash valve, the bottom through-hole of valve seat is communicated with the outer tube bottommost, and the top through hole of valve seat is communicated with the flushing chamber of outer tube and the formation of branch chamber gap bridge joint and the cavity between outer tube and the pump barrel and forms the flushing designated lane.
7, according to the arbitrary described external valve type hydraulic self-sealing plunger oil-well pump of claim 1 to 5, it is characterized in that: described pump barrel is established seal section, but seal section is provided with the seal section shell of conducting pressure, an elastic telescopic cover is housed in the shell, and closed assembly has a plurality of wear-resisting seal rings in elastic telescopic cover the inside.
8, external valve type hydraulic self-sealing plunger oil-well pump according to claim 6, it is characterized in that: described pump barrel is established seal section, but seal section is provided with the seal section shell of conducting pressure, and an elastic telescopic cover is housed in the shell, and closed assembly has a plurality of wear-resisting seal rings in elastic telescopic cover the inside.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103039747A CN101469700A (en) | 2007-12-24 | 2007-12-24 | External valve type hydraulic self-sealing plunger oil-well pump |
| PCT/CN2008/002045 WO2009092189A1 (en) | 2007-12-24 | 2008-12-23 | External valve type hydraulic self-sealing piston oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103039747A CN101469700A (en) | 2007-12-24 | 2007-12-24 | External valve type hydraulic self-sealing plunger oil-well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101469700A true CN101469700A (en) | 2009-07-01 |
Family
ID=40827446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103039747A Pending CN101469700A (en) | 2007-12-24 | 2007-12-24 | External valve type hydraulic self-sealing plunger oil-well pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101469700A (en) |
| WO (1) | WO2009092189A1 (en) |
Cited By (2)
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| CN103334921A (en) * | 2013-06-14 | 2013-10-02 | 西安石油大学 | Piston-type low diameter oil pump with external dual valves |
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Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86209054U (en) * | 1986-11-04 | 1987-12-05 | 胜利油田采油工艺研究院 | Anti-sand oil pump |
| CN2048906U (en) * | 1989-04-26 | 1989-12-06 | 武光生 | Tubular oil-well pump |
| US5048604A (en) * | 1990-11-07 | 1991-09-17 | Intevep, S.A. | Sucker rod actuated intake valve assembly for insert subsurface reciprocating pumps |
| US5141416A (en) * | 1991-02-14 | 1992-08-25 | Dover Resources, Inc. | Plunger for a downhole reciprocating oil well pump and the method of manufacture thereof |
| CN2290709Y (en) * | 1996-09-19 | 1998-09-09 | 辽河油田钻采机械厂 | Strong sealing oil pump |
| CN2366583Y (en) * | 1999-04-12 | 2000-03-01 | 宋德福 | Solid plunger oil pump |
| CN2367797Y (en) * | 1999-05-19 | 2000-03-08 | 马东 | Tubelike integral oil-pump without jointing hoop |
| CN2434448Y (en) * | 2000-01-01 | 2001-06-13 | 郝云鹏 | Rotary plunger oil-well pump |
| CN100335794C (en) * | 2003-04-07 | 2007-09-05 | 于海涛 | Clean hole screw rod pump against sand block |
| CN2654902Y (en) * | 2003-09-19 | 2004-11-10 | 马保中 | Oil pump with external oil inlet and outlet valve |
| CN100385120C (en) * | 2005-07-06 | 2008-04-30 | 大庆油田有限责任公司 | Hydraulic self-sealed plunger oil-well pump |
| CN2811599Y (en) * | 2005-07-07 | 2006-08-30 | 大庆油田有限责任公司 | Hydraulic self-sealing plunger oil-well pump |
| CN1851267A (en) * | 2006-05-15 | 2006-10-25 | 闻本良 | Rod type ceramic oil-pump |
| CN200955490Y (en) * | 2006-09-14 | 2007-10-03 | 大庆油田有限责任公司 | Efficient bionical-face sealing valve oil pump |
| CN201155448Y (en) * | 2007-12-24 | 2008-11-26 | 黑龙江省嘉信石化机械有限公司 | External valve type hydraulic self-sealing plunger oil pump |
-
2007
- 2007-12-24 CN CNA2007103039747A patent/CN101469700A/en active Pending
-
2008
- 2008-12-23 WO PCT/CN2008/002045 patent/WO2009092189A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769271B (en) * | 2010-01-14 | 2012-11-21 | 韩克楚 | Deep-well oil-extraction external flow-channel direct and reverse circulation freely-throwing jet injector oil production method and device |
| CN103334921A (en) * | 2013-06-14 | 2013-10-02 | 西安石油大学 | Piston-type low diameter oil pump with external dual valves |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009092189A1 (en) | 2009-07-30 |
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Application publication date: 20090701 |