CN2700606Y - Ground surface driven screw pump for rodless pumping operation - Google Patents
Ground surface driven screw pump for rodless pumping operation Download PDFInfo
- Publication number
- CN2700606Y CN2700606Y CNU2003201284775U CN200320128477U CN2700606Y CN 2700606 Y CN2700606 Y CN 2700606Y CN U2003201284775 U CNU2003201284775 U CN U2003201284775U CN 200320128477 U CN200320128477 U CN 200320128477U CN 2700606 Y CN2700606 Y CN 2700606Y
- Authority
- CN
- China
- Prior art keywords
- pump
- rotor
- screw pump
- tubing string
- ground
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The utility model discloses a ground surface driven screw pump for rodless pumping operation which not only uses an underground pipe column as the oil producing channel from the well to the ground, but also uses the underground pipe column to replace the anchor bolt to drive a rotor underground. The spiral direction of the screw pump is opposite to the rotating direction of the pipe column. The rotor is manufactured into a hollow structure. A driving device on ground drives the rotating of the pipe column which drives the rotating of the rotor. The well liquid enters a pump chamber from the top of the pump, and then enters the high pressure chamber of the lower end of the pump after the pressure is increased. The well liquid enters the pipe column through an oil outlet connector and the inner bore of the rotor; therefore, the well liquid is lifted to the pipe line on ground. A flex axle and a tension bearing are arranged on the lower end of the pump to prevent the problems that a stator moves downward when the pressure difference acts on the pump in working and the pump group underground can be lifted to the ground with the pipe column when the examination and repair operation is conducted. Owing to the canceling of the anchor bolt, the cost of the screw pump matched device is reduced greatly, and the expense of lifting the lower anchor bolt is also saved. Besides, the eccentric wear of the bar pipe is avoided, the revolution speed of the pump is improved in duplication, and the structure parameter and the manufacturing cost of the pump are reduced by using the utility model.
Description
Technical field: the utility model relates to a kind of screw pump that is used for petroleum production, relates in particular to a kind of sucker rod of having cancelled, with the oil pumping screw pump of tubing string driving.
Background technique: the existing screw pump that is used for oil mining is a rotor of the rotation torque that the well head drive unit produces being passed to underwell pump by the roofbolt of oil pipe inside, thereby well liquid is lifted to ground, and extraction liquid is to be lifted to ground in the annular space between roofbolt and tubing string.This screw pump has been brought into play great role in polymer flooding and thickened oil recovery, and uses the well number to increase year by year in recent years.Yet it still has following shortcoming and defect: the cost height of, installing for the first time, the pump setting depth major part of screw pump is all more than km, therefore need above special-purpose sucker rod of km or special hollow rod, this not only makes individual well increase by 70,000 yuan roofbolt expense, but also to be that special hollow stem is equipped with 3 " above oil pipe (box cupling size restrictions), and former well 21/2 " oil pipe can not get due utilization.Two, roofbolt box cupling and tubing string inwall wear and tear, and this light abrasion then injures the heavy then worn out tube wall of tubing string.Three, limited effective performance of underwell pump group maximum reasonable discharge capacity, the practice of screw pump oil production both at home and abroad shows, subsurface progressive cavity can long-service life high-efficiency below 500rpm work, but because the restriction of roofbolt eccentric wear and transmitting torque ability thereof, the average working speed of domestic oil pumping screw pump is less than 200rpm, particularly change above its actual working speed of pump of discharge capacity 800ml 120rpm is only arranged, rotating speed is limited just, just continually develop macrostructure parameter screw pump to satisfy the needs of big discharge capacity oil well, yet the macrostructure parameter screw pump not only complicated cost height of its manufacturing process and initial torque is big, and mechanical efficiency is low.Four, installation and maintenance operation complexity, roofbolt are not only brought the negative effects such as taking off eccentric wear of breaking, and have almost increased by one times the workload that removes when upkeep operation is installed.
Summary of the invention; The purpose of this utility model is: provide a kind of subsurface progressive cavity to overcome above-mentioned the deficiencies in the prior art, the one, the cancellation drive rod also achieves as oil discharge passage and the dual functions that drives the down-hole rotor with former well casing post, thereby is lowered into the complete equipment cost significantly.The 2nd, prolong the repair cycle thereby exempt the roofbolt eccentric wear.The 3rd, thus the working speed that significantly improves device reduces the structural parameter of underwell pump group at double.Another purpose of the present utility model provides a kind of subsurface progressive cavity that the installation and maintenance operation is simple and expense is cheap that has.
The purpose of this utility model is by providing a kind of subsurface progressive cavity and fixture thereof with following structure to realize that this screw pump and match equipment thereof comprise: down-hole string, stator centralizer, pump stator, sleeve rotor, delivery connection, flexible shaft (or flexible joint), tension bearing, following one-way valve and stator anchor.Described down-hole string promptly also replaces roofbolt driving down-hole rotor as the oil discharge passage on down-hole to ground, the purpose one of scratching axle and tension bearing is set in the lower end of pump is and prevent that pump from scurrying under the pressure difference effect stator at work, the 2nd, but underwell pump group Sui Guanzhu is played ground together during upkeep operation.Tension bearing is designed to the static-pressure sliding bearing structure, utilizes the rotating ring of the pressure official post bearing in pump discharge and the oil jacket annular space to be in quick condition work, thereby can unrestrictedly prolong bearing working life.The purpose that one-way valve is set down is that screw pump well liquid in the process of going into the well can be entered in the tubing string, thereby avoids well liquid driven pump rotation in the process of going into the well.The Hand of spiral of subsurface progressive cavity is opposite with the tubing string sense of rotation, that is: if tubing string is dextrorotation, screw pump is then made left-handed pump, if tubing string is left-handed, screw pump is then made the dextrorotation pump.Rotor is made hollow-core construction.Surface drive drives the rotation of tubing string dextrad, tubing string drive rotor also do the dextrad rotation (from well head to downhole to), well liquid enters in the pump chamber from the upper end of pump, enter the high-pressure chamber of pump lower end after the supercharging, endoporus through delivery connection and rotor enters in the tubing string again, is lifted to surface line at last.
The effect of stator anti-rotation anchor is to prevent pump stator Sui rotor rotation at work.
The main shaft of well head drive unit is made hollow-core construction and is made the screw thread that is connected with tubing string in the lower end of main shaft, and the upper end of main shaft is provided with delivery connection.
Adopt the subsurface progressive cavity and the match equipment thereof of said structure, owing to cancelled the cost that roofbolt has reduced a whole set of oil rig.Saved the operating cost that removes this roofbolt simultaneously.Another benefit of cancellation roofbolt is an eccentric wear of having avoided rod tube, thereby can significantly improve the working speed of screw pump.Thereby another benefit of cancellation roofbolt is to have increased the interior area of passage of pipe to prolong period of removing the wax significantly.
Description of drawings:
Fig. 1 is the structure sectional view of the utility model ground surface driving rodless pumping operation screw pump and match equipment thereof.
Fig. 2 is the A---A cross-sectional view of the utility model Fig. 1.
Embodiment: the utility model is described in further detail below in conjunction with drawings and embodiments.
Fig. 1 is the typical structure schematic representation of screw pump of the present utility model and match equipment thereof, it by down-hole string 1, stator centralizer 2, pump stator 5, sleeve rotor 6, delivery connection 7, scratch axle 4, tension bearing pedestal 23, down one-way valve 27 and stator anti-rotation anchor etc. are formed.The hollow spindle 16 and tubing string 1 screwed connection of well head drive unit 12, tubing string 1 is connected with the upper end of sleeve rotor 6 bottom, end is connected with delivery connection 7 under the rotor 6, the lower end of described joint 7 with scratch the axle 4 upper ends be connected, scratching axle 4 lower end passes from the center hole of tension bearing pedestal 23, scratch axle 4 bearing rotating ring 30 is housed bottom, described rotating ring 30 is fixed on by key 29 and nut 31 and scratches on the axle 4, pressure isolation cover 32 is equipped with in the lower end of bearing base 23, by communication passage 26 chamber 25 is communicated with ring-like space 34, the upper and lower end of the frame of bearing base 23 is connected with the upper connection 35 of pump case lower contact 33 and one-way valve 27 respectively, one-way valve 27 lower ends are connected with stator anti-rotation anchor 28 center tubes, centralizer positioning joint 3 is equipped with in the stator case upper end, centralizer 2 is enclosed within on the positioning joint 3, at 10 to 30 meters, centralizer 2 upper ends one-way valve 11 is installed, oil drain valve 9 is equipped with at an oil pipe place thereon, in each tubing coupling 10 abrasionproof device 8 is housed
Described down-hole string promptly also replaces roofbolt driving down-hole rotor as the oil discharge passage on down-hole to ground.The Hand of spiral of subsurface progressive cavity is opposite with the tubing string sense of rotation, that is: if tubing string is dextrorotation, screw pump is then made left-handed pump, if tubing string is left-handed, screw pump is then made the dextrorotation pump.Rotor is made hollow-core construction.Well head drive unit 12 drives the rotation of tubing string 1 dextrad, tubing string 1 drives rotor 6 and also does the dextrad rotation simultaneously, pass axial passage (not shown) that annular space that anchor 28 and sleeve pipe 13 form rise and pass centralizer 2 from the well liquid of oil reservoir this moment, flow downward then, after entering the pump chamber supercharging, process chamber 19 enters high-pressure chamber 18, one-way valve 27 is closed, enter the internal channel 15 of tubing string 1 again through the mesopore 20 of through hole 14 on the delivery connection 7 and rotor 6, be lifted to well head by one-way valve 11 again, enter petroleum pipeline by well head SEALING FITTING 17.
The purpose one of scratching axle and tension bearing is set in the lower end of pump is and prevent that pump from scurrying under the pressure difference effect stator at work, the 2nd, but underwell pump group Sui Guanzhu is played ground together during upkeep operation.Tension bearing is designed to the static-pressure sliding bearing structure, utilizes the rotating ring of the pressure official post bearing in pump discharge and the oil jacket annular space to be in quick condition work, thereby can unrestrictedly prolong bearing working life.In the screw pump rotating process, high-pressure liquids in the chamber 18 have a very little very little part and pass gap 22 and flow to bearing rotating ring 30, flow into chamber 25 through gap 24 again, because chamber 25 is communicated with low pressure area 34, the upper-end surface of bearing rotating ring 30 is subjected to a downward axial force and forms fluid cushion continuously between friction pair, so bearing can not wear and tear.
The purpose that one-way valve is set down is that screw pump well liquid in the process of going into the well can be entered in the tubing string, thereby avoids well liquid driven pump rotation in the process of going into the well.Well liquid enters tubing string inner chamber 15 by center tube (not shown), one-way valve 27, through hole 21, intercommunicating pore 14, the rotor inner hole 20 of anti-rotation anchor 28 in the process of going into the well.
The effect of stator anchor is to prevent pump stator Sui rotor rotation at work.
The sand setting holddown is provided with one-way valve 11 when preventing to shut down, and the sand grains that is suspended in when shutting down in the well liquid will be to deposit, and is isolated on the one-way valve 11, has avoided obstruction rotor inner hole 20 and chamber 18.The sand setting that is deposited on when the pump group starts once more on the one-way valve 11 will be re-suspended in the well liquid under pump function.
Well liquid when having prevented pump in the tubing string pollutes the well site, is provided with oil drain valve 9, need only before the pump to drop into iron staff from ground it is pounded to break can make in the liquid inflow sleeve pipe in the tubing string and can not pollute the well site in tubing string.
Abrasionproof device 8 all is housed above each tubing coupling, and its effect is that the inwall of its box cupling 10 and sleeve pipe 13 rubs when preventing that tubing string from rotating.Abrasionproof device 8 is to be made by selflubricating, elastomer that anti-friction is wear-resisting.For not influencing the test of producing fluid level, the external diameter of abrasionproof device 8 the most very much not should surpass 107mm.
According to design philosophy of the present utility model; this oil pumping screw pump and each parts thereof structurally also can have multiple changes and improvements; for example cancel one-way valve 27 and its passage is blocked; make tension bearing into hydraulic bearing or rolling bearing structure etc., such conversion and the variation structurally of each parts all drop within the protection domain of the present utility model.
Claims (4)
1, ground surface driving rodless pumping operation screw pump, by the well head drive unit, down-hole string, pump stator, rotor and stator anti-rotation anchor are formed, it is characterized in that: down-hole string (1) promptly also replaces roofbolt driving down-hole rotor as the oil discharge passage on down-hole to ground, the hollow spindle (16) of well head drive unit (12) and tubing string (1) screwed connection, tubing string (1) is connected with the upper end of sleeve rotor (6) bottom, end is connected with delivery connection (7) under the rotor (6), the lower end of described joint (7) with scratch the axle (4) upper end be connected, scratching the lower end of axle (4) passes from the center hole of tension bearing pedestal (23), axle (4) is equipped with bearing rotating ring (30) bottom, described rotating ring (30) is to be fixed on by key (29) and nut (31) to scratch on the axle (4), pressure isolation cover (32) is equipped with in the lower end of bearing base (23), by communication passage (26) chamber (25) is communicated with ring-like space (34), the upper and lower end of bearing base (23) frame is connected with the upper connection (35) of pump case lower contact (33) and one-way valve (27) respectively, one-way valve (27) lower end is connected with stator anti-rotation anchor (28) center tube, centralizer positioning joint (3) is equipped with in the stator case upper end, centralizer (2) is enclosed within on the positioning joint (3), at 10 to 30 meters, centralizer (2) upper end one-way valve (11) is installed, thereon on oil pipe, eduction valve (9) is housed, abrasionproof device (8) is housed in each tubing coupling (10).
2, according to the described rodless pumping operation screw pump of claim 1, it is characterized in that: the Hand of spiral of screw pump is opposite with the tubing string sense of rotation, and tubing string is dextrorotation, and screw pump is then made left-handed pump, and tubing string is left-handed, and screw pump is then made the dextrorotation pump.
3, according to the described rodless pumping operation screw pump of claim 1, it is characterized in that: rotor (6) is made hollow-core construction.
4, according to the described rodless pumping operation screw pump of claim 1, it is characterized in that: described tension bearing is a static-pressure sliding bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201284775U CN2700606Y (en) | 2003-12-03 | 2003-12-03 | Ground surface driven screw pump for rodless pumping operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201284775U CN2700606Y (en) | 2003-12-03 | 2003-12-03 | Ground surface driven screw pump for rodless pumping operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2700606Y true CN2700606Y (en) | 2005-05-18 |
Family
ID=34762875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201284775U Expired - Fee Related CN2700606Y (en) | 2003-12-03 | 2003-12-03 | Ground surface driven screw pump for rodless pumping operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2700606Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481463A (en) * | 2014-11-24 | 2015-04-01 | 马琳琳 | Rotating tube driving screw pump oil production device and application method |
| CN104937270A (en) * | 2013-01-17 | 2015-09-23 | 耐驰泵及***有限公司 | Rotor for screw pumps and/or eccentric screw pumps, and a screw pump or eccentric screw pump |
| CN106151061A (en) * | 2016-07-29 | 2016-11-23 | 中国石油天然气股份有限公司 | Combined threaded rod pump and without bar hoisting system |
| CN108223331A (en) * | 2018-01-06 | 2018-06-29 | 西南石油大学 | A kind of rod pumping pump and ground driving screw pump combined type oil pumping system |
| CN109578270A (en) * | 2018-12-05 | 2019-04-05 | 盐城世宏石油装备有限公司 | All-metal bridge type screw pump |
| CN114542024A (en) * | 2020-11-10 | 2022-05-27 | 中国石油天然气股份有限公司 | Oil production system |
-
2003
- 2003-12-03 CN CNU2003201284775U patent/CN2700606Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104937270A (en) * | 2013-01-17 | 2015-09-23 | 耐驰泵及***有限公司 | Rotor for screw pumps and/or eccentric screw pumps, and a screw pump or eccentric screw pump |
| CN104481463A (en) * | 2014-11-24 | 2015-04-01 | 马琳琳 | Rotating tube driving screw pump oil production device and application method |
| CN106151061A (en) * | 2016-07-29 | 2016-11-23 | 中国石油天然气股份有限公司 | Combined threaded rod pump and without bar hoisting system |
| CN108223331A (en) * | 2018-01-06 | 2018-06-29 | 西南石油大学 | A kind of rod pumping pump and ground driving screw pump combined type oil pumping system |
| CN108223331B (en) * | 2018-01-06 | 2023-12-26 | 西南石油大学 | Combined oil pumping system of rod oil pump and ground driving screw pump |
| CN109578270A (en) * | 2018-12-05 | 2019-04-05 | 盐城世宏石油装备有限公司 | All-metal bridge type screw pump |
| CN109578270B (en) * | 2018-12-05 | 2023-10-31 | 盐城世宏石油装备有限公司 | All-metal gap bridge type screw pump |
| CN114542024A (en) * | 2020-11-10 | 2022-05-27 | 中国石油天然气股份有限公司 | Oil production system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |