EP0216406B1 - Fluid driven pumping apparatus - Google Patents

Fluid driven pumping apparatus Download PDF

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Publication number
EP0216406B1
EP0216406B1 EP86201423A EP86201423A EP0216406B1 EP 0216406 B1 EP0216406 B1 EP 0216406B1 EP 86201423 A EP86201423 A EP 86201423A EP 86201423 A EP86201423 A EP 86201423A EP 0216406 B1 EP0216406 B1 EP 0216406B1
Authority
EP
European Patent Office
Prior art keywords
motor
pump
fluid
screw
rotors
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 - Lifetime
Application number
EP86201423A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0216406A1 (en
Inventor
Peter Eric Simmons
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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
Priority claimed from GB858521978A external-priority patent/GB8521978D0/en
Priority claimed from GB868605033A external-priority patent/GB8605033D0/en
Application filed by Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to AT86201423T priority Critical patent/ATE65826T1/de
Publication of EP0216406A1 publication Critical patent/EP0216406A1/en
Application granted granted Critical
Publication of EP0216406B1 publication Critical patent/EP0216406B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B43/129—Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • F04C11/003—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle having complementary function
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01C13/04—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving pumps or compressors

Definitions

  • the invention relates to a fluid driven apparatus for pumping a fluid or a mixture of fluids.
  • the invention relates in particular to a twin rotor screw type pumping apparatus for pumping fluids at remote or difficult accessible locations, such as in a well or in a sub-sea flowline.
  • a known fluid driven pumping apparatus comprises a twin rotor screw type positive displacement motor having a driving fluid inlet and a driving fluid outlet, and connected to said motor a twin rotor screw type positive displacement pump having a pumped fluid inlet and a pumped fluid outlet, the apparatus further comprising a pair of parallel shafts rotatably mounted in a housing, each shaft carrying a screw rotor of said pump and a screw rotor of said motor, wherein the rotors of the pump section define working chambers having a different fluid displacement volume than the working chambers defined by the rotors of the motor section.
  • An object of the invention is to provide a compact and reliable fluid driven pumping apparatus which has a low wear rate even if the produced fluid is sand bearing and which can be easily installed in a flowline system.
  • a further object of the invention is to provide a fluid driven pumping apparatus which is able to pump both gaseous and liquid fluids or mixtures thereof.
  • the fluid driven pumping apparatus is characterized in that the screw rotors of said pump have a larger tip diameter and a correspondingly smaller base diameter than the screw rotors of said motor, and that the driving fluid outlet of said motor is in fluid communication with the inlet of said pump via a chamber formed in the interior of the housing between said motor and said pump.
  • the driving fluid outlet is in fluid communication with the pumped fluid inlet so that the driving fluid emerging from the motor mixes with the incoming pumped fluid before the combined fluid stream passes into the pump.
  • the screw rotors of said pump and motor which are mounted on a common shaft are identical in helix angle and pitch diameter.
  • Fig. 1 showing a longitudinal section of a pumping apparatus according to the invention.
  • the pumping apparatus shown in Fig. 1 comprises a housing 1 enclosed in a protective shell 2.
  • the housing 1 consists of a side wall 3 and upper and lower terminal walls 5 and 6, respectively.
  • the lower part of the housing contains a motor section consisting of a twin rotor screw type positive displacement motor 10, whereas the upper part of the housing contains a pump section consisting of a twin rotor screw type positive displacement pump 11.
  • the motor section 10 comprises a pair of cooperating screw rotors 10A and 10B
  • the pump section 11 comprises a similar pair of cooperating screw rotors 11A and 11B.
  • the screw rotors 10A and 11A shown at the left side of the drawing are identical in helix angle and they are mounted on a common shaft 13, whereas the screw rotors 10B and 11B shown at the right side of the drawing are also identical in helix angle and mounted on a common shaft 14.
  • the helix angles of the cooperating pairs of screw rotors 10A, 10B and 11A, 11B, respectively, are opposite to each other and the axes of rotation of the shafts 13 and 14 are parallel to each other.
  • the screw rotors 11A, 11B of the pump and the screw rotors 10A, 10B of the motor have identical pitch radii R p , but the screw rotors 11A, 11B of the pump have a larger tip radius and a correspondingly smaller base radius than the screw rotors 10A, 10B of the motor.
  • the shafts 13 and 14 are supported by bearings 16 in the upper- and lower terminal walls 5, 6.
  • the bearings 16 may be of any suitable type and it is preferred to lubricate the bearings with clean drive fluid derived from an inlet compartment 17 at the upstream end 18 of the motor.
  • the shafts 13 and 14 may each be provided with a bore (not shown) forming a fluid communication between the said inlet compartment 17 and the bearings 16 in said upper wall 5.
  • clean drive fluid can be introduced into close clearance points at the rotor tips, further preventing damage by sand and other erosive matter.
  • clean drive fluid can be supplied to the bearings 16 in the upper terminal wall 5 through a suitable passage (not shown) in the housing.
  • driving fluid is injected into the inlet compartment 17 via a driving fluid inlet port 20 passing through the side wall 2 of the apparatus at a location adjacent to the lower housing wall 6.
  • Said injection causes the drive fluid to move in upward direction through the lower compartment 8 towards a chamber 21 formed in the middle of the housing 1 between the downstream end 22 of the motor 10 and the upstream end 23 of the pump, thereby actuating the screw rotors 10A, 10B of the motor to rotate in opposite directions, as indicated by arrows V.
  • the manner in which the drive fluid actuates the screw rotors 10A, 10B of the twin rotor screw type motor is known per se and does not require a detailed description.
  • the pumping apparatus shown in Fig. 1 may be used to pump single- or multiphase fluids such as mixture of hydrocarbon fluids containing crude oil and natural gas, while the pumped fluids may contain solid particles, such as sand, without giving rise to a largely increased wear rate of the apparatus.
  • the pumped fluid mainly consists of a liquid, it is preferred to use recirculated pumped fluid as driving fluid and to filter solid particles such as sand from the pumped fluid before reinjecting it into the driving fluid inlet 20 of the apparatus as a clean driving fluid.
  • the reinjected pumped fluid may be mixed up with other fluids or lubricants if the viscosity of the pumped fluid is too high to allow it to be used as driving fluid.
  • the pumped fluid consists of a gas-liquid mixture it is preferred to separate the liquid phase from the gaseous phase and to use the liquid phase as driving fluid. If the pumped fluid mainly consists of a gas it is preferred to use a liquid as driving fluid. This would enable sufficient lubrication of the bearings 16 and rotor tips 19 and would further provide sufficient minimum flow of liquid through the pump to enable the pump to continue to develop its full differential pressure.
  • the shafts may also be arranged at an angle relative to each other, provided that the screw rotors of the pump and motor have a suitable shape.
  • the pumping apparatus according to the invention may be used to pump single- or multiphase fluids such as mixture of hydrocarbon fluids containing crude oil and natural gas, while the produced fluids may contain solid particles, such as sand, without giving rise to a largely increased wear rate of the apparatus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
EP86201423A 1985-09-04 1986-08-15 Fluid driven pumping apparatus Expired - Lifetime EP0216406B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86201423T ATE65826T1 (de) 1985-09-04 1986-08-15 Durch fluessigkeit angetriebene pumpe.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB858521978A GB8521978D0 (en) 1985-09-04 1985-09-04 Pumping well fluids
GB8521978 1985-09-04
GB868605033A GB8605033D0 (en) 1986-02-28 1986-02-28 Fluid driven pumping apparatus
GB8605033 1986-02-28

Publications (2)

Publication Number Publication Date
EP0216406A1 EP0216406A1 (en) 1987-04-01
EP0216406B1 true EP0216406B1 (en) 1991-07-31

Family

ID=26289729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86201423A Expired - Lifetime EP0216406B1 (en) 1985-09-04 1986-08-15 Fluid driven pumping apparatus

Country Status (6)

Country Link
EP (1) EP0216406B1 (no)
AU (1) AU595828B2 (no)
CA (1) CA1289412C (no)
DE (1) DE3680621D1 (no)
NO (1) NO171028C (no)
SG (1) SG69692G (no)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2357887C (en) 2001-09-28 2006-07-04 Pradeep Dass Method of adapting a downhole multi-phase twin screw pump for use in wells having a high gas content and a downhole multi-phase twin screw pump
GB0210018D0 (en) * 2002-05-01 2002-06-12 Univ City Plural-screw machines
US7401655B2 (en) * 2005-07-07 2008-07-22 Baker Hughes Incorporated Downhole gas compressor
EP2216501A1 (en) * 2009-02-10 2010-08-11 BP Exploration Operating Company Limited Pump
DE102014000846A1 (de) 2014-01-27 2015-07-30 Klaus Union Gmbh & Co. Kg Schraubenspindelpumpe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409970C1 (de) * 1984-03-19 1985-07-18 Norton Christensen, Inc., Salt Lake City, Utah Vorrichtung zum Foerdern von fliessfaehigen Stoffen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1702838A (en) * 1927-12-30 1929-02-19 Sullivan Machinery Co Combined mechanical and air-lift pumping system
US2269189A (en) * 1939-03-20 1942-01-06 Harold R Downs Fluid pump
US2804260A (en) * 1949-07-11 1957-08-27 Svenska Rotor Maskiner Ab Engines of screw rotor type
US3184155A (en) * 1963-04-17 1965-05-18 Cooper Bessemer Corp Motor compressor unit
US4292011A (en) * 1979-08-20 1981-09-29 Kobe, Inc. Turbo pump gas compressor
US4386654A (en) * 1981-05-11 1983-06-07 Becker John A Hydraulically operated downhole oil well pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409970C1 (de) * 1984-03-19 1985-07-18 Norton Christensen, Inc., Salt Lake City, Utah Vorrichtung zum Foerdern von fliessfaehigen Stoffen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Laurenz Richter," Schraubenverdichter," Springer Verlag,1979,p.124-125 *

Also Published As

Publication number Publication date
AU595828B2 (en) 1990-04-12
AU6215386A (en) 1987-03-05
SG69692G (en) 1992-09-04
NO863514L (no) 1987-03-05
EP0216406A1 (en) 1987-04-01
CA1289412C (en) 1991-09-24
NO863514D0 (no) 1986-09-02
DE3680621D1 (de) 1991-09-05
NO171028C (no) 1993-01-13
NO171028B (no) 1992-10-05

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