GB2112872A - Pumping apparatus for installation in wells - Google Patents
Pumping apparatus for installation in wells Download PDFInfo
- Publication number
- GB2112872A GB2112872A GB08234958A GB8234958A GB2112872A GB 2112872 A GB2112872 A GB 2112872A GB 08234958 A GB08234958 A GB 08234958A GB 8234958 A GB8234958 A GB 8234958A GB 2112872 A GB2112872 A GB 2112872A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pump
- well
- oil
- stator
- reaction core
- 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.)
- Withdrawn
Links
- 238000009434 installation Methods 0.000 title claims description 3
- 238000005086 pumping Methods 0.000 title claims description 3
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000003129 oil well Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
-
- 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
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
An electric pump is suitable for location in a well, e.g. an oil well, to lift liquid in the well has a linear motor, has a stator 5 comprising a winding enclosed within a tubular housing 4 and a reaction core assembly 10 adapted for reciprocating motion in an axial direction within the tubular housing of the stator. The pump is particularly suitable for relatively small production rates and can have a longer stroke than a conventional plunger type pump. <IMAGE>
Description
SPECIFICATION
Apparatus for installation in wells
This invention relates to an electric pump for lifting liquids such as oil or water in wells.
When oil is produced from a well it is usual for the oil initially to flow up the well to the surface as a result of the pressure existing in the oil bearing formation underground. However, during the producing life of the oil field the pressure underground falls and often a point is reached when the pressure is not sufficient to cause the oil to flow to the surface. One way of maintaining the flow of oil has been to install an electric pump in the well, usually at a depth which is near the oil bearing formation typically from 300 to 3,000 metres, and employ the pump to lift the oil to the surface.
The pump is usually of high power, for example, several hundred horsepower, and may be up to 45 metres in length whilst only about 20 cm in diameter.
A new form of downhole electric pump has been devised.
Thus according to the present invention an electric pump suitable for location in a well to lift liquid in the well has a linear motor.
Conveniently the pump is arranged so that its reaction core reciprocates with respect to its stator and preferably is provided with upper and lower non-return valves to prevent well fluids flowing down the well.
The invention is illustrated by reference to the accompanying drawings in which Fig. 1 is a vertical section of the pump installed in a well and supported on production tubing and Fig. 2 is a vertical section of an alternative embodiment of the pump drawn on a larger scale.
The pump indicated generally by numeral 2 is of generally elongate shape and comprises a cylindrical steel housing 4 enclosing a stator 5 of tubular form which comprises a winding 6 enclosed within a metal can 8. Within the stator 5 is a reaction core assembly 10 which in use moves up and down within the stator. The reaction core is provided with a surface to provide a sliding seal 9 against the inside of the stator can 8. At the bottom of the reaction core assembly is a flat valve 12. The seal 9 can be provided by a substance such as polytetrafluoroethylene or by a piston ring. At the top of the pump is a further flap valve 14. Valves 12 and 14 are of known type, for example, as used in piunger type pumps to lift oil in the UK Midlands.The pump is supported by a production tubing 1 6 and supplied with electrical power by cable 18, which terminates in cable box 44. At the bottom of the pump is shown a stop member 20 to limit the travel of the reaction core.
The pump described above has the following advantages:
(i) it is particularly suitable for relatively small production rates, and,
(ii) it can have a longer stroke, e.g. 9 to 12 metres, than a conventional plunger type pump, 0.9 to 1.8 metres.
Referring to Fig. 2 the pump 2 is of generally similar construction to that in Fig. 1 with the exception that means are provided to use the return or downward stroke of the pump to drive oil upwards to the surface. The pump 2 is provided with an annular passage 30 with cylinder liner 32 and delivery and exit valves 34 and 36 respectively arranged so that the underside 35 of the head of the reaction core 10 can be used to force oil through port 42 into the production tubing 1 6 above the upper nonreturn flap valve 14 during the return stroke. The advantage of this feature is that by suitably selecting the dimensions of the passages and valves and mechanical efficiency of the pump can be approximately doubled as compared with a single acting pump.
Claims
1. An electric pump suitable for location in a well to lift liquid in the well, the pump having a linear motor.
2. An electric pump as claimed in claim 1 wherein the stator of the motor comprises a winding enclosed within a tubular housing.
3. An electric pump as claimed in claim 2 wherein the reaction core of the motor is adapted for reciprocating motion in an axial direction within the tubular housing of the stator.
4. A pump as claimed in claim 3 wherein the reaction core constitutes or is provided with a
piston arranged to co-operate with one or more valves to drive oil upwardly in the well on the return stroke of the reaction core.
5. An electric motor as claimed in claim 4 wherein a sliding seal is provided between the
reaction core and stator housing.
6. An electric motor as claimed in any one of claims 1 to 5 comprising one or more valves to prevent well fluids flowing back down the well.
7. An electric pump as claimed in any one of claims 3 to 6 wherein one or more stops are provided to limit the travel of the reaction core.
8. A method of lifting well liquid in a well which comprises pumping the liquid employing a pump having a linear electric motor.
9. An electric pump as hereinbefore described with reference to Figs. 1 or 2 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (9)
1. An electric pump suitable for location in a well to lift liquid in the well, the pump having a linear motor.
2. An electric pump as claimed in claim 1 wherein the stator of the motor comprises a winding enclosed within a tubular housing.
3. An electric pump as claimed in claim 2 wherein the reaction core of the motor is adapted for reciprocating motion in an axial direction within the tubular housing of the stator.
4. A pump as claimed in claim 3 wherein the reaction core constitutes or is provided with a
piston arranged to co-operate with one or more valves to drive oil upwardly in the well on the return stroke of the reaction core.
5. An electric motor as claimed in claim 4 wherein a sliding seal is provided between the
reaction core and stator housing.
6. An electric motor as claimed in any one of claims 1 to 5 comprising one or more valves to prevent well fluids flowing back down the well.
7. An electric pump as claimed in any one of claims 3 to 6 wherein one or more stops are provided to limit the travel of the reaction core.
8. A method of lifting well liquid in a well which comprises pumping the liquid employing a pump having a linear electric motor.
9. An electric pump as hereinbefore described with reference to Figs. 1 or 2 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08234958A GB2112872A (en) | 1981-12-10 | 1982-12-08 | Pumping apparatus for installation in wells |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8137273 | 1981-12-10 | ||
| GB08234958A GB2112872A (en) | 1981-12-10 | 1982-12-08 | Pumping apparatus for installation in wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2112872A true GB2112872A (en) | 1983-07-27 |
Family
ID=26281512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08234958A Withdrawn GB2112872A (en) | 1981-12-10 | 1982-12-08 | Pumping apparatus for installation in wells |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2112872A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0237145A2 (en) * | 1986-01-14 | 1987-09-16 | Framo Developments (U.K.) Limited | Electrically powered pump unit |
| EP0310254A2 (en) * | 1987-09-07 | 1989-04-05 | Framo Developments (U.K.) Limited | Reciprocating pump unit |
| US5620048A (en) * | 1994-09-30 | 1997-04-15 | Elf Aquitaine Production | Oil-well installation fitted with a bottom-well electric pump |
| FR2746858A1 (en) * | 1996-03-29 | 1997-10-03 | Elf Aquitaine | LINEAR MOTOR ELECTRIC PUMP |
| WO2017009591A1 (en) * | 2015-07-15 | 2017-01-19 | Statoil Petroleum As | Pipeline plunger |
| CN106704160A (en) * | 2017-02-08 | 2017-05-24 | 辽宁科技大学 | Downhole oil pumping pump electrical drive device |
| CN109723631A (en) * | 2018-12-27 | 2019-05-07 | 中国海洋石油集团有限公司 | A kind of oil well pump for marine high power oil-submersible linear electric motor |
| CN111255673A (en) * | 2020-02-26 | 2020-06-09 | 江苏华扬液碳有限责任公司 | Reciprocating type variable-frequency deep submersible pump and control method thereof |
-
1982
- 1982-12-08 GB GB08234958A patent/GB2112872A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0237145A2 (en) * | 1986-01-14 | 1987-09-16 | Framo Developments (U.K.) Limited | Electrically powered pump unit |
| EP0237145A3 (en) * | 1986-01-14 | 1988-01-27 | Framo Developments (U.K.) Limited | Electrically powered pump unit |
| EP0310254A2 (en) * | 1987-09-07 | 1989-04-05 | Framo Developments (U.K.) Limited | Reciprocating pump unit |
| EP0310254A3 (en) * | 1987-09-07 | 1990-05-30 | Framo Developments (U.K.) Limited | Reciprocating pump unit |
| US5620048A (en) * | 1994-09-30 | 1997-04-15 | Elf Aquitaine Production | Oil-well installation fitted with a bottom-well electric pump |
| FR2746858A1 (en) * | 1996-03-29 | 1997-10-03 | Elf Aquitaine | LINEAR MOTOR ELECTRIC PUMP |
| WO2017009591A1 (en) * | 2015-07-15 | 2017-01-19 | Statoil Petroleum As | Pipeline plunger |
| CN106704160A (en) * | 2017-02-08 | 2017-05-24 | 辽宁科技大学 | Downhole oil pumping pump electrical drive device |
| CN106704160B (en) * | 2017-02-08 | 2018-09-18 | 辽宁科技大学 | A kind of downhole pump power-driven gear |
| CN109723631A (en) * | 2018-12-27 | 2019-05-07 | 中国海洋石油集团有限公司 | A kind of oil well pump for marine high power oil-submersible linear electric motor |
| CN111255673A (en) * | 2020-02-26 | 2020-06-09 | 江苏华扬液碳有限责任公司 | Reciprocating type variable-frequency deep submersible pump and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5960875A (en) | Electric pump having a linear motor | |
| US6497561B2 (en) | Downstroke sucker rod pump and method of use | |
| WO1983001817A1 (en) | Oilwell pump system and method | |
| CA2934914C (en) | Downhole motor driven reciprocating well pump | |
| GB2112872A (en) | Pumping apparatus for installation in wells | |
| US4350478A (en) | Bottom hole oil well pump | |
| US2748712A (en) | Hydraulic pump | |
| EP0217796A4 (en) | A pump. | |
| US3697199A (en) | Slide valve pump | |
| EP0237145A2 (en) | Electrically powered pump unit | |
| SU521396A1 (en) | Submersible plunger pump | |
| CN113123950B (en) | Submersible electric plunger pump | |
| US11466548B2 (en) | Downhole linear pump system | |
| US8591202B2 (en) | Positive displacement pumping system | |
| CA2373733C (en) | Full flow tubing stationary valve pump apparatus | |
| CN201037457Y (en) | Highly effective linear motor oil extraction pump | |
| RU171485U1 (en) | Installation of a borehole plunger pump with a submersible linear electric drive | |
| US20170314546A1 (en) | Rotary Motor Driven Reciprocating Downhole Pump Assembly | |
| US2517952A (en) | Pump | |
| RU20137U1 (en) | INSTALLATION FOR LIFTING WATER FROM THE ARTESIAN WELL | |
| SU1193269A2 (en) | Deep-well pumping-rod unit | |
| RU2802907C1 (en) | Hydraulic rod drive of a submersible positive displacement pump (embodiments) | |
| US2672815A (en) | Apparatus for pumping viscous crude | |
| RU171538U1 (en) | Borehole Pumping Unit | |
| US3292552A (en) | Pumping apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |