CA2644277A1 - Flush-by system - Google Patents
Flush-by system Download PDFInfo
- Publication number
- CA2644277A1 CA2644277A1 CA002644277A CA2644277A CA2644277A1 CA 2644277 A1 CA2644277 A1 CA 2644277A1 CA 002644277 A CA002644277 A CA 002644277A CA 2644277 A CA2644277 A CA 2644277A CA 2644277 A1 CA2644277 A1 CA 2644277A1
- Authority
- CA
- Canada
- Prior art keywords
- lifting device
- stator
- rotor
- flushing apparatus
- flushing
- 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.)
- Abandoned
Links
- 238000011010 flushing procedure Methods 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- 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
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
-
- 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
-
- 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
- F04C2230/00—Manufacture
- F04C2230/80—Repairing methods
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A flushing apparatus for flushing a downhole pump having a rotor and a stator includes a lifting device forming part of a wellhead assembly. The lifting device is attached to the rotor, such that when activated, the lifting device applies a lifting force to lift the rotor out of the stator. There is a fluid connection on the wellhead assembly for flushing fluid through the stator once the rotor has been removed from the stator.
Description
TITLE
[0001 ] Flush-by system FIELI) [0002] The present invention relates to a system for performing a flush-by of a pump, and a rnethod of performing the same.
BACKGROUND
[0001 ] Flush-by system FIELI) [0002] The present invention relates to a system for performing a flush-by of a pump, and a rnethod of performing the same.
BACKGROUND
[0003] When pumps, such as downhole pumps, become sanded-in, waxed-in or otherwise clogged, a flush-by truck must be called onsite to remove the rotor from the stator and then flush diluent through the stator to clear the blockage.
SUMMARY
SUMMARY
[0004] A flushing apparatus for flushing a downhole pump having a rotor and a stator comprises a lifting device forming part of a wellhead assembly. The lifting device is attached to the rotor, such that when activated, the lifting device applies a lifting force to lift the rotor out of the stator. There is a fluid connection on the wellhead assembly for flushing fluid through the stator once the rotor has been removed from the stator.
BRIEF DESCRIPTION OF THE DRAWINGS [0005] These and other features will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to be in any way limiting, wherein:
FIG. 1 is a schematic view in partial cross-section of the flushby system.
FIG. 2 is a schematic view in partial cross-section of the flushby system with the rotor lifted from the stator.
FIG. 3 is a schematic view in partial cross-section of the flushby system with an alternative lifting device.
DETAILED DESCRIPTION
[0006] A flush-by system generally identified by reference numeral 10, will now be clescribed with reference to FIG.1 through 3.
[0007] Structure and Relationship of Parts:
[0008] Referring to FIG. 1, a progressive cavity pump 12, such as a progressive cavity pump, having a rotor 14 and stator 16 is driven by a drive head 18 at surface.
Referring to FIG. 2, when resistance against the movement of rotor 14 within stator 16 increases, such as by sand, wax, or other substances, a lifting device 20 associated with drive head 18 is used to lift rotor 14 out of stator 16. An on-site tank of fluid 22, or other convenience source of fluid, is then used to flush the stator using any suitable flushing fluid through a connection 23 on the wellhead assembly 26 that is known in the art. Tank of fluid 22 may be a tank that is currently used to keep a small flow of fluid down to pump 12, in which case, a modification must be made to allow for a greater flow of fluid from tank 22 to attain the necessary flow rate and pressure of the fluid being used to flush pump 12.
[0009] Lifting device 20 may be a multi-stage hydraulic ram 24 as shown, or other type of piston, such as mechanical or electric. Referring to FIG. 3, the mechanical means may include a gear box 28 that, when engaged, causes rotor 14 to lift out of stator 16. For size considerations, a multistage ram is preferred, however it will be understood that any suitable extendable design could be used, such as a single ram 30 as shown in FIG. 3.
Lifting device forms part of a wellhead assembly 26 in which it may be directly mounted to the wellhead, 20 or indirectly through other wellhead equipment, such as drive head 18 as shown. In each of these examples, lifting device 20 rotates or allows rotor 14 to rotate in order to allow it to be removed from stator 16.
[0010] Lifting device 20 and fluid flow from tank 22 may each be controlled by a controller (not shown), which may be operated manually, automatically, locally or remotely. The operation of lifting device 20 and fluid flow from tank 22 may be initiated by: high torque, low ef~iciency or flow rate from the wellhead, base solids and water, a certain period of time, completion of coil tubing work, or completion of well maintenance. These indicators may be sensecl using sensors or input manually into the controller, either remotely or locally.
[0011] In this patent document, the word "comprising" is used in its non-limiting sense to rnean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
[0012] The following claims are to be understood to include what is specifically illustrated and described above, what is conceptually equivalent, and what can be obviously substituted.
Those skilled in the art will appreciate that various adaptations and modifications of the described embodiments can be configured without departing from the scope of the claims.
The illustrated embodiments have been set forth only as examples and should not be taken as limitirig the invention. It is to be understood that, within the scope of the following claims, the invention may be practiced other than as specifically illustrated and described.
BRIEF DESCRIPTION OF THE DRAWINGS [0005] These and other features will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to be in any way limiting, wherein:
FIG. 1 is a schematic view in partial cross-section of the flushby system.
FIG. 2 is a schematic view in partial cross-section of the flushby system with the rotor lifted from the stator.
FIG. 3 is a schematic view in partial cross-section of the flushby system with an alternative lifting device.
DETAILED DESCRIPTION
[0006] A flush-by system generally identified by reference numeral 10, will now be clescribed with reference to FIG.1 through 3.
[0007] Structure and Relationship of Parts:
[0008] Referring to FIG. 1, a progressive cavity pump 12, such as a progressive cavity pump, having a rotor 14 and stator 16 is driven by a drive head 18 at surface.
Referring to FIG. 2, when resistance against the movement of rotor 14 within stator 16 increases, such as by sand, wax, or other substances, a lifting device 20 associated with drive head 18 is used to lift rotor 14 out of stator 16. An on-site tank of fluid 22, or other convenience source of fluid, is then used to flush the stator using any suitable flushing fluid through a connection 23 on the wellhead assembly 26 that is known in the art. Tank of fluid 22 may be a tank that is currently used to keep a small flow of fluid down to pump 12, in which case, a modification must be made to allow for a greater flow of fluid from tank 22 to attain the necessary flow rate and pressure of the fluid being used to flush pump 12.
[0009] Lifting device 20 may be a multi-stage hydraulic ram 24 as shown, or other type of piston, such as mechanical or electric. Referring to FIG. 3, the mechanical means may include a gear box 28 that, when engaged, causes rotor 14 to lift out of stator 16. For size considerations, a multistage ram is preferred, however it will be understood that any suitable extendable design could be used, such as a single ram 30 as shown in FIG. 3.
Lifting device forms part of a wellhead assembly 26 in which it may be directly mounted to the wellhead, 20 or indirectly through other wellhead equipment, such as drive head 18 as shown. In each of these examples, lifting device 20 rotates or allows rotor 14 to rotate in order to allow it to be removed from stator 16.
[0010] Lifting device 20 and fluid flow from tank 22 may each be controlled by a controller (not shown), which may be operated manually, automatically, locally or remotely. The operation of lifting device 20 and fluid flow from tank 22 may be initiated by: high torque, low ef~iciency or flow rate from the wellhead, base solids and water, a certain period of time, completion of coil tubing work, or completion of well maintenance. These indicators may be sensecl using sensors or input manually into the controller, either remotely or locally.
[0011] In this patent document, the word "comprising" is used in its non-limiting sense to rnean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
[0012] The following claims are to be understood to include what is specifically illustrated and described above, what is conceptually equivalent, and what can be obviously substituted.
Those skilled in the art will appreciate that various adaptations and modifications of the described embodiments can be configured without departing from the scope of the claims.
The illustrated embodiments have been set forth only as examples and should not be taken as limitirig the invention. It is to be understood that, within the scope of the following claims, the invention may be practiced other than as specifically illustrated and described.
Claims (8)
1. A flushing apparatus for flushing a downhole pump having a rotor and a stator, the flushing apparatus comprising:
a lifting device forming part of a wellhead assembly, the lifting device being attached to the rotor, such that when activated, the lifting device applies a lifting force to lift the rotor out of the stator; and a fluid connection on the wellhead assembly for flushing fluid through the stator once the rotor has been removed from the stator.
a lifting device forming part of a wellhead assembly, the lifting device being attached to the rotor, such that when activated, the lifting device applies a lifting force to lift the rotor out of the stator; and a fluid connection on the wellhead assembly for flushing fluid through the stator once the rotor has been removed from the stator.
2. The flushing apparatus of claim 1, wherein the lifting device and the source of fluid are controlled by a controller.
3. The flushing apparatus of claim 2, wherein the controller is activated manually.
4. The flushing apparatus of claim 2, wherein the controller is activated in response to an input signal, the input signal being generated by a condition of high torque, low efficiency, low flow rate, base solids and water, time, completion of coil tubing work, or completion of well maintenance.
5. The flushing apparatus of claim 2, wherein the controller receives input signals locally or by a remote input.
6. The flushing apparatus of claim 1, wherein the lifting device is a telescopic ram.
7. The flushing apparatus of claim 1, wherein the lifting device is hydraulically driven.
8. The flushing apparatus of claim 1, wherein the lifting device is gear driven.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US98631307P | 2007-11-08 | 2007-11-08 | |
| US60/986,313 | 2007-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2644277A1 true CA2644277A1 (en) | 2009-05-08 |
Family
ID=40620921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002644277A Abandoned CA2644277A1 (en) | 2007-11-08 | 2008-11-10 | Flush-by system |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20090126924A1 (en) |
| CA (1) | CA2644277A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653129B (en) * | 2013-11-19 | 2017-11-10 | 中国石油天然气股份有限公司 | Method for washing screw pump oil well |
| US9670757B2 (en) | 2015-02-10 | 2017-06-06 | Warren WESSEL | Downhole pump flushing system and method of use |
| US11499549B2 (en) * | 2016-06-10 | 2022-11-15 | Activate Artificial Lift Inc. | Progressing cavity pump and methods of operation |
| US20180347337A1 (en) * | 2017-06-01 | 2018-12-06 | Michael C. Romer | Progressive Cavity Pump Tubing Tester |
| US11788383B2 (en) * | 2018-10-02 | 2023-10-17 | Klx Energy Services Llc | Apparatus and method for removing debris from a wellbore |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5143153A (en) * | 1991-07-31 | 1992-09-01 | Bach Ronald L | Rotary oil well pump and sucker rod lift |
| US5772396A (en) * | 1996-05-15 | 1998-06-30 | Environamics Corporation | Pump having flush system for seal arrangement |
| CA2248484A1 (en) * | 1998-09-25 | 2000-03-25 | Lloyd L. Walker | Back spin swivelling device for a progressive cavity pump |
| US6648072B1 (en) * | 1999-07-20 | 2003-11-18 | Smith International, Inc. | Method and apparatus for delivery of treatment chemicals to subterranean wells |
| US6358027B1 (en) * | 2000-06-23 | 2002-03-19 | Weatherford/Lamb, Inc. | Adjustable fit progressive cavity pump/motor apparatus and method |
| CA2452696C (en) * | 2003-12-19 | 2006-02-14 | Jackie I. Baycroft | Universal pressure protector for a polish rod |
| CA2490846C (en) * | 2004-12-22 | 2006-12-19 | Sabre Machining Ltd. | Eccentric wellhead hyrdraulic drive unit |
| US7419007B2 (en) * | 2005-10-12 | 2008-09-02 | Robbins & Myers Energy Systems, L.P. | Retrievable downhole pumping system |
| CA2662055C (en) * | 2006-09-08 | 2013-03-12 | National Oilwell Varco, L.P. | Systems and methods to retard rod string backspin |
-
2008
- 2008-11-10 CA CA002644277A patent/CA2644277A1/en not_active Abandoned
- 2008-11-10 US US12/267,865 patent/US20090126924A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20090126924A1 (en) | 2009-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |