GB2405891A - Choke for controlling the flow of drilling mud - Google Patents

Choke for controlling the flow of drilling mud

Info

Publication number
GB2405891A
GB2405891A GB0428285A GB0428285A GB2405891A GB 2405891 A GB2405891 A GB 2405891A GB 0428285 A GB0428285 A GB 0428285A GB 0428285 A GB0428285 A GB 0428285A GB 2405891 A GB2405891 A GB 2405891A
Authority
GB
United Kingdom
Prior art keywords
drilling
well bore
choke
drilling fluid
flow
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
GB0428285A
Other versions
GB2405891B (en
GB0428285D0 (en
Inventor
Riet Egbert Jan Van
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
Application filed by Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB0428285D0 publication Critical patent/GB0428285D0/en
Publication of GB2405891A publication Critical patent/GB2405891A/en
Application granted granted Critical
Publication of GB2405891B publication Critical patent/GB2405891B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

The invention relates to a drilling system and method for drilling a well bore into an earth formation, comprising:-drilling means for drilling a well bore;- pumping means for pumping drilling fluid into the well bore during drilling; and - a drilling fluid outlet system for retrieving drilling fluid from the well bore, said drilling fluid outlet system comprising choke means for choking the return flow of retrieved drilling fluid, and alternating means for alternating the flow direction through the choking means.
GB0428285A 2002-07-08 2003-06-24 Choke for controlling the flow of drilling mud Expired - Fee Related GB2405891B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02254746 2002-07-08
PCT/EP2003/006750 WO2004005667A1 (en) 2002-07-08 2003-06-24 Choke for controlling the flow of drilling mud

Publications (3)

Publication Number Publication Date
GB0428285D0 GB0428285D0 (en) 2005-01-26
GB2405891A true GB2405891A (en) 2005-03-16
GB2405891B GB2405891B (en) 2005-11-16

Family

ID=30011236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0428285A Expired - Fee Related GB2405891B (en) 2002-07-08 2003-06-24 Choke for controlling the flow of drilling mud

Country Status (5)

Country Link
US (2) US20060086538A1 (en)
AU (1) AU2003242762A1 (en)
CA (1) CA2491925A1 (en)
GB (1) GB2405891B (en)
WO (1) WO2004005667A1 (en)

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CA3145912A1 (en) 2019-08-01 2021-02-04 Adrian Horgan Increasing long-sequence yields in template-free enzymatic synthesis of polynucleotides.
JP2022547918A (en) 2019-09-09 2022-11-16 ディーエヌエー スクリプト Templateless Enzymatic Polynucleotide Synthesis Using Photocleavable Links
JP2022549196A (en) 2019-09-23 2022-11-24 ディーエヌエー スクリプト Increased Yields of Long Sequences in Templateless Enzymatic Synthesis of Polynucleotides
CN114761575A (en) 2019-11-13 2022-07-15 Dna斯克瑞普特公司 Efficient template-free enzymatic synthesis of polynucleotides
EP4073240A1 (en) 2019-12-12 2022-10-19 DNA Script Chimeric terminal deoxynucleotidyl transferases for template-free enzymatic synthesis of polynucleotides
US20230203553A1 (en) 2019-12-16 2023-06-29 Dna Script Template-Free Enzymatic Polynucleotide Synthesis Using Dismutationless Terminal Deoxynucleotidyl Transferase Variants
WO2021170524A1 (en) 2020-02-25 2021-09-02 Dna Script Method and apparatus for enzymatic synthesis of polynucleotides
EP4139446A1 (en) 2020-04-20 2023-03-01 DNA Script Terminal deoxynucleotidyl transferase variants and uses thereof
WO2021254934A1 (en) 2020-06-16 2021-12-23 Dna Script Systems, apparatus and kits for enzymatic polynucleotide synthesis
WO2022013094A1 (en) 2020-07-15 2022-01-20 Dna Script Massively parallel enzymatic synthesis of polynucleotides
AU2021347452A1 (en) 2020-09-22 2023-04-27 Dna Script Stabilized n-terminally truncated terminal deoxynucleotidyl transferase variants and uses thereof
WO2022090323A1 (en) 2020-10-29 2022-05-05 Dna Script Enzymatic synthesis of polynucleotide probes
WO2022207934A1 (en) 2021-04-02 2022-10-06 Dna Script Methods and kits for enzymatic synthesis of g4-prone polynucleotides
AU2022388772A1 (en) 2021-11-10 2024-05-16 Dna Script Novel terminal deoxynucleotidyl
WO2023083999A2 (en) 2021-11-10 2023-05-19 Dna Script Novel terminal deoxynucleotidyl transferase (tdt) variants
WO2024083883A1 (en) 2022-10-19 2024-04-25 Dna Script Methods and products for removal of uracil containing polynucleotides
WO2024121022A1 (en) 2022-12-05 2024-06-13 Dna Script Variants of poly(a) polymerase and uses thereof

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US3365009A (en) * 1966-07-12 1968-01-23 Gerald E. Burnham Drilling fluid circulation system having flow parameter regulating means
US3508577A (en) * 1967-04-05 1970-04-28 Pan American Petroleum Corp Blowout control valve for drilling well
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EP0947750A2 (en) * 1998-04-03 1999-10-06 Cemi Piscine Service S.r.l. Five-way butterfly valve

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US3354970A (en) * 1965-02-08 1967-11-28 Pan American Petroleum Corp Controlling high-pressure wells while drilling
US3365009A (en) * 1966-07-12 1968-01-23 Gerald E. Burnham Drilling fluid circulation system having flow parameter regulating means
US3508577A (en) * 1967-04-05 1970-04-28 Pan American Petroleum Corp Blowout control valve for drilling well
US4630675A (en) * 1985-05-28 1986-12-23 Smith International Inc. Drilling choke pressure limiting control system
EP0947750A2 (en) * 1998-04-03 1999-10-06 Cemi Piscine Service S.r.l. Five-way butterfly valve

Also Published As

Publication number Publication date
GB2405891B (en) 2005-11-16
US20060086538A1 (en) 2006-04-27
GB0428285D0 (en) 2005-01-26
US20070240875A1 (en) 2007-10-18
CA2491925A1 (en) 2004-01-15
WO2004005667A1 (en) 2004-01-15
AU2003242762A1 (en) 2004-01-23

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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)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100624