GB2254656A - A pump system for downhole use. - Google Patents

A pump system for downhole use. Download PDF

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Publication number
GB2254656A
GB2254656A GB9127435A GB9127435A GB2254656A GB 2254656 A GB2254656 A GB 2254656A GB 9127435 A GB9127435 A GB 9127435A GB 9127435 A GB9127435 A GB 9127435A GB 2254656 A GB2254656 A GB 2254656A
Authority
GB
United Kingdom
Prior art keywords
pump
pump system
pumps
tubing
conduit
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.)
Granted
Application number
GB9127435A
Other versions
GB9127435D0 (en
GB2254656B (en
Inventor
Paul Shotter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCOTIA ENGINEERING Ltd
Original Assignee
SCOTIA ENGINEERING Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SCOTIA ENGINEERING Ltd filed Critical SCOTIA ENGINEERING Ltd
Publication of GB9127435D0 publication Critical patent/GB9127435D0/en
Publication of GB2254656A publication Critical patent/GB2254656A/en
Application granted granted Critical
Publication of GB2254656B publication Critical patent/GB2254656B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/029—Stopping of pumps, or operating valves, on occurrence of unwanted conditions for pumps operating in parallel
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps

Abstract

The system comprises a first pump (16) and a second pump (46) connected in tandem parallel relationship, each pump having its own electric motor arrangement for independent operation. During normal use only one pump functions but in the event of its malfunction an isolation valve 22 may be actuated and the second pump is actuated to take over pumping operations. <IMAGE>

Description

A PUMP SYSTEM This invention relates to a tandem system for downhole use.
In oil production the crude oil is generally lifted to the surface by means of a downhole pump driven by an electric motor. Through time the pump can develop faults which render it inoperable, and in such cases the pump and its associated equipment has to be raised to the surface and repaired or replaced. This causes expensive discontinuation of the oil recovery and withdrawal from the drill hole of great lengths of equipment.
According to the present invention there is provided a pump system for downhole use, comprising first and second pumps coupled to a conduit, the pumps being independently actuable.
The invention is also a completion assembly for downhole use including a pump system as defined in the immediately preceding paragraph.
Preferably, the pumps are coupled to the conduit in parallel.
The invention is of especial use in a Y-tool configuration in which each of the pumps is disposed in side-by-side relationship with bypass tubing for wireline use. The bypass tubing adjacent the pumps may be unidirectional and interconnected by a coupling member to provide a straight passageway for a wireline past both pumps.
Preferably, each Y-tool includes a valve which permits each bypass tubing to be opened or closed. Typically, the valve may be an isolation valve which may comprise an isolation sleeve, blanking plug or logging plug to close the bypass tubing. Removal of the isolation sleeve, blanking plug or logging plug opens the bypass tubing.
Preferably, the first pump is located above the second pump.
Typically, the pump system also includes a support device to support at least a portion of the weight of the pump system. Typically, the support is coupled to the upper pump and helps support the weight of the lower pump.
Preferably each of the pumps is driven by a respective motor, and preferably each of the pumps is included in a respective assembly of the pump and its associated motor. More than one motor may be drivingly connected with each pump.
Preferably also each of the pumps is actuable through an electrical supply from the surface which is independent of the supply to the other pump.
It is conceivable that more than two pumps may be provided, each with its own remotely actuable power supply.
By virtue of the invention, failure of the first downhole pump need not necessitate lifting of the pump and its associated equipment to the surface, as the second pump can then be actuated remotely to continue the operation. The first and second pumps may be actuated simultaneously if required to increase the pumping effect.
Preferably, the pump system is coupled to and below a packer. The packer in turn is typically coupled to and below a tubing hanger and tubing bonnet. Typically, the packer, tubing hanger and tubing bonnet have dual penetrators to permit independent power supplies to each pump.
An embodiment of the present invention will now be described by way pf example with reference to the accompanying drawings, in which: Figs. l(a) to (e) provide a sequenced side view of an ESP completion assembly having a tandem pump arrangement in accordance with the invention; and, Fig. 2 is a schematic view of a packer, tubing hanger and tubing bonnet to which the apparatus of Fig.1 is coupled.
Referring to the drawings, the completion assembly of this embodiment of the invention has at an upper end portion a submersible pump packer 2, conduits 4, 6 and a 4 inch (100mm) diameter main mandrel 8 which provides production tubing for upward passage of crude oil to the surface. Above the packer 2, the mandrel 8 and conduits 4, 6 extend up to and through a tubing hanger 51 and a tubing bonnet 52, as shown in Fig.2.
Below the packer 2 the mandrel 8 enters a 4.5 inch (114mm) diameter Wrynose twin cable cross-coupling cable protector 10 which leads to a Wrynose tandem ESP bypass tool 12 in which the passageway for oil extends in side-by-side relationship with 2.875 inch (73mm) diameter bypass tubing 14. The bypass tubing 14 provides a passageway for a wireline and is in straight-line communication with the passage through the production tubing above it.
The passageway for oil is in the form of a first assembly 16 comprising a pump 18 of conventional design whose outlet 20 communicates with the production tubing above the bypass tubing 14 through a Wrynose isolation valve 22. The isolation valve 22 may include an isolation sleeve, blanking plug or logging plug which acts as the valve member. The pump 18 is drivingly connected to a pair of conventional downhole electric motors 24, 26 through an equalisation device 28 for equalising the fluid pressure in the motors 24, 26.
The combination of the assembly 16 and the bypass tubing 14 is a Y-tool as in current use downhole.
The bypass tubing 14 continues below the assembly 16 as 2.875 inch (73mm) production tubing 30 and enters a 4.5 x 2.875 inch (114 x 73mm) cross-over 32 which itself is connected to a Wrynose ESP bypass tool 34 fitted with a reduced-diameter no-go nipple. In the tool 34 the oil passageway extends side-by-side with 2.375/2.875 inch (60 x 73mm) bypass tubing 36 for wireline use. The tubing 36 is in straight-line communication with the production tubing 30.
The oil passageway at the tool 34 consists of a second assembly 46 comprising a pump 38, equalisation device 40 and motors 42, 44 in the same fashion as the first assembly 16 and provides the same function and pumping output as the first assembly 16.
Hence, the pump assemblies 16, 46 are coupled in parallel to the main mandrel 8.
The first and second assemblies 16, 46 are selectively actuated from the surface through respective independent electric cables extending downwards through the conduits 4, 6.
During use, the pump 18 of the first assembly 16 is driven by the motors 24, 26 to force crude oil from a reservoir in which the assembly is situated to the surface; the motors 42, 44 and pump 38 of the second assembly are normally at rest during this period, although they can if desired be actuated to increase the overall pumping effect.
In the event of the motors 24, 26 or the pump 18 developing a fault and ceasing to operate, the isolation valve 22 is opened and the motors 42, 44 and pump 38 of the second assembly are actuated to take over the pumping function. Hence, there is no need for significant loss of production from the reservoir by withdrawal of the equipment and replacement of the faulty unit.
This embodiment of the invention therefore provides a very substantial economic benefit in oil production by allowing pumping to continue.
Modifications and improvements may be incorporated without departing from the scope of the invention.

Claims (14)

Claims
1 A pump system for downhole use comprising first and second pumps coupled to a conduit, the pumps being independently actuable.
2 A pump system according to Claim 1, wherein the pumps are coupled to the conduit in parallel.
3 A pump system according to Claim 2, wherein the pump system includes a valve device to selectively couple the first or the second pump to the conduit.
4 A pump system according to any of the preceding claims, further comprising bypass tubing in side-by-side relationship with each pump.
5 A pump system according to Claim 4, further comprising a connector to couple each pump and respective bypass tubing to the conduit.
6 A pump system according to Claim 4 or Claim 5, wherein the portion of the conduit coupled to the second pump forms the bypass tubing of the first pump.
7 A pump system according to any of Claims 4 to 6, wherein the bypass tubing is undirectional.
8 A pump system according to any of the preceding claims, the pump system also including a support to support at least a portion of the weight of the pump system.
9 A pump system according to Claim 8, wherein the support supports the weight of at least a portion of one of the pumps and respective bypass tubing.
10 A pump system according to any of the preceding claims, wherein an independent power supply is provided for each pump.
11 A pump system according to any of the preceding claims, wherein the pumps are remotely actuable.
12 A completion assembly for downhole use, including a pump system according to any of the preceding claims.
13 A pump system as hereinbefore described with reference to the accompanying drawings.
14 A completion assembly for downhole use, including a pump system as herein before described with reference to any of the accompanying drawings.
GB9127435A 1990-12-29 1991-12-27 A pump system Expired - Fee Related GB2254656B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909028186A GB9028186D0 (en) 1990-12-29 1990-12-29 Tandem pump system

Publications (3)

Publication Number Publication Date
GB9127435D0 GB9127435D0 (en) 1992-02-19
GB2254656A true GB2254656A (en) 1992-10-14
GB2254656B GB2254656B (en) 1994-10-19

Family

ID=10687676

Family Applications (2)

Application Number Title Priority Date Filing Date
GB909028186A Pending GB9028186D0 (en) 1990-12-29 1990-12-29 Tandem pump system
GB9127435A Expired - Fee Related GB2254656B (en) 1990-12-29 1991-12-27 A pump system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB909028186A Pending GB9028186D0 (en) 1990-12-29 1990-12-29 Tandem pump system

Country Status (3)

Country Link
AU (1) AU2449692A (en)
GB (2) GB9028186D0 (en)
WO (1) WO1994004789A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004789A1 (en) * 1990-12-29 1994-03-03 GHASSEMZADEH, John Downhole tandem pump system
GB2361017A (en) * 2000-03-10 2001-10-10 Pump Tools Ltd Dual pump system
GB2369862A (en) * 2000-10-18 2002-06-12 Schlumberger Holdings Multi-stage pumping system
GB2395964A (en) * 2002-12-03 2004-06-09 Baker Hughes Inc Pump bypass system
WO2015049476A1 (en) * 2013-10-03 2015-04-09 Bardot Group Autonomous module for the acceleration and pressurisation of a fluid while submerged
FR3011591A1 (en) * 2013-10-03 2015-04-10 Bardot Group AUTONOMOUS MODULE FOR ACCELERATING OR PRESSURIZING AN IMMERSION FLUID
RU2606196C2 (en) * 2012-03-12 2017-01-10 Норали АС Pump and pump section
GB2549751A (en) * 2016-04-27 2017-11-01 Baker Hughes Inc Method of pumping a well with dual alternate submersible pumps
US20230129694A1 (en) * 2021-10-27 2023-04-27 Saudi Arabian Oil Company Electrical submersible pump for a wellbore
US11643911B2 (en) 2016-07-26 2023-05-09 Schlumberger Technology Corporation Integrated electric submersible pumping system with electromagnetically driven impeller

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB423073A (en) * 1933-04-11 1935-01-24 Siemens Ag Improvements relating to pumping plant for mines
GB782446A (en) * 1955-02-12 1957-09-04 Beresford James & Son Ltd Improvements relating to submersible electrically driven centrifugal pumps
GB1085042A (en) * 1965-01-22 1967-09-27 Blum Albert Improvements in electrical immersed pumps
EP0023126A1 (en) * 1979-07-18 1981-01-28 The British Petroleum Company p.l.c. Electric well pump
GB2057058A (en) * 1979-08-20 1981-03-25 Kobe Inc Turbine-driven pumps
EP0089121A1 (en) * 1982-02-19 1983-09-21 Framo Developments (U.K.) Limited Pump systems
US4548263A (en) * 1984-03-14 1985-10-22 Woods Billy E Fitting for dual submersible pumps

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528738A1 (en) * 1963-08-14 1969-09-25 Loewe Pumpenfabrik Gmbh Twin pump
GB8629746D0 (en) * 1986-12-12 1987-01-21 Phoenix Petroleum Services Installation of downhole pumps in wells
GB9028186D0 (en) * 1990-12-29 1991-02-13 Scotia Engineering Limited Tandem pump system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB423073A (en) * 1933-04-11 1935-01-24 Siemens Ag Improvements relating to pumping plant for mines
GB782446A (en) * 1955-02-12 1957-09-04 Beresford James & Son Ltd Improvements relating to submersible electrically driven centrifugal pumps
GB1085042A (en) * 1965-01-22 1967-09-27 Blum Albert Improvements in electrical immersed pumps
EP0023126A1 (en) * 1979-07-18 1981-01-28 The British Petroleum Company p.l.c. Electric well pump
GB2057058A (en) * 1979-08-20 1981-03-25 Kobe Inc Turbine-driven pumps
EP0089121A1 (en) * 1982-02-19 1983-09-21 Framo Developments (U.K.) Limited Pump systems
US4548263A (en) * 1984-03-14 1985-10-22 Woods Billy E Fitting for dual submersible pumps

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994004789A1 (en) * 1990-12-29 1994-03-03 GHASSEMZADEH, John Downhole tandem pump system
GB2361017A (en) * 2000-03-10 2001-10-10 Pump Tools Ltd Dual pump system
GB2361017B (en) * 2000-03-10 2004-03-31 Pump Tools Ltd Dual pump system
GB2369862A (en) * 2000-10-18 2002-06-12 Schlumberger Holdings Multi-stage pumping system
GB2369862B (en) * 2000-10-18 2003-07-23 Schlumberger Holdings Integrated pumping system for use in pumping a variety of fluids
GB2395964B (en) * 2002-12-03 2005-07-13 Baker Hughes Inc Pump bypass system
GB2395964A (en) * 2002-12-03 2004-06-09 Baker Hughes Inc Pump bypass system
US7059345B2 (en) 2002-12-03 2006-06-13 Baker Hughes Incorporated Pump bypass system
RU2606196C2 (en) * 2012-03-12 2017-01-10 Норали АС Pump and pump section
WO2015049476A1 (en) * 2013-10-03 2015-04-09 Bardot Group Autonomous module for the acceleration and pressurisation of a fluid while submerged
FR3011591A1 (en) * 2013-10-03 2015-04-10 Bardot Group AUTONOMOUS MODULE FOR ACCELERATING OR PRESSURIZING AN IMMERSION FLUID
GB2549751A (en) * 2016-04-27 2017-11-01 Baker Hughes Inc Method of pumping a well with dual alternate submersible pumps
US11643911B2 (en) 2016-07-26 2023-05-09 Schlumberger Technology Corporation Integrated electric submersible pumping system with electromagnetically driven impeller
US20230129694A1 (en) * 2021-10-27 2023-04-27 Saudi Arabian Oil Company Electrical submersible pump for a wellbore
US11828145B2 (en) * 2021-10-27 2023-11-28 Saudi Arabian Oil Company Electrical submersible pump for a wellbore

Also Published As

Publication number Publication date
GB9127435D0 (en) 1992-02-19
AU2449692A (en) 1994-03-15
WO1994004789A1 (en) 1994-03-03
GB2254656B (en) 1994-10-19
GB9028186D0 (en) 1991-02-13

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20091227