GB2396064B - Filtering apparatus - Google Patents

Filtering apparatus

Info

Publication number
GB2396064B
GB2396064B GB0328665A GB0328665A GB2396064B GB 2396064 B GB2396064 B GB 2396064B GB 0328665 A GB0328665 A GB 0328665A GB 0328665 A GB0328665 A GB 0328665A GB 2396064 B GB2396064 B GB 2396064B
Authority
GB
United Kingdom
Prior art keywords
filtering apparatus
filtering
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
GB0328665A
Other versions
GB0328665D0 (en
GB2396064A (en
Inventor
Kurt Ledoux
William C Pelton
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.)
Schlumberger Holdings Ltd
Original Assignee
Schlumberger Holdings 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
Priority claimed from US09/888,746 external-priority patent/US6531842B2/en
Application filed by Schlumberger Holdings Ltd filed Critical Schlumberger Holdings Ltd
Publication of GB0328665D0 publication Critical patent/GB0328665D0/en
Publication of GB2396064A publication Critical patent/GB2396064A/en
Application granted granted Critical
Publication of GB2396064B publication Critical patent/GB2396064B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • 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
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Inverter Devices (AREA)
GB0328665A 2001-06-25 2002-06-11 Filtering apparatus Expired - Lifetime GB2396064B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/888,746 US6531842B2 (en) 2001-06-25 2001-06-25 Sine wave variable speed drive
GB0213343A GB2378483B (en) 2001-06-25 2002-06-11 Electrical submersible pumping systems

Publications (3)

Publication Number Publication Date
GB0328665D0 GB0328665D0 (en) 2004-01-14
GB2396064A GB2396064A (en) 2004-06-09
GB2396064B true GB2396064B (en) 2004-12-08

Family

ID=32299712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0328665A Expired - Lifetime GB2396064B (en) 2001-06-25 2002-06-11 Filtering apparatus

Country Status (1)

Country Link
GB (1) GB2396064B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8193745B2 (en) 2005-05-13 2012-06-05 Schlumberger Technology Corporation Filtering and boosting a signal from a drive circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204751A (en) * 1987-04-22 1988-11-16 Davis Group Ltd Discharge lamp circuits
US5559396A (en) * 1994-10-14 1996-09-24 Philips Electronics North America Inc. Ballast filtering scheme for reduced harmonic distortion
US5568371A (en) * 1994-09-29 1996-10-22 Texas A&M University System Active harmonic power filter apparatus and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204751A (en) * 1987-04-22 1988-11-16 Davis Group Ltd Discharge lamp circuits
US5568371A (en) * 1994-09-29 1996-10-22 Texas A&M University System Active harmonic power filter apparatus and method
US5559396A (en) * 1994-10-14 1996-09-24 Philips Electronics North America Inc. Ballast filtering scheme for reduced harmonic distortion

Also Published As

Publication number Publication date
GB0328665D0 (en) 2004-01-14
GB2396064A (en) 2004-06-09

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20220610