CA2516277A1 - Dynamic annular pressure control apparatus and method - Google Patents

Dynamic annular pressure control apparatus and method Download PDF

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Publication number
CA2516277A1
CA2516277A1 CA002516277A CA2516277A CA2516277A1 CA 2516277 A1 CA2516277 A1 CA 2516277A1 CA 002516277 A CA002516277 A CA 002516277A CA 2516277 A CA2516277 A CA 2516277A CA 2516277 A1 CA2516277 A1 CA 2516277A1
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CA
Canada
Prior art keywords
fluid
drilling
pump
longitudinal
discharge 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
CA002516277A
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French (fr)
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CA2516277C (en
Inventor
Egbert Jan Van Riet
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.)
@BALANCE BV
Original Assignee
Shell Canada Limited
Egbert Jan Van Riet
@Balance B.V.
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32987210&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2516277(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Shell Canada Limited, Egbert Jan Van Riet, @Balance B.V. filed Critical Shell Canada Limited
Publication of CA2516277A1 publication Critical patent/CA2516277A1/en
Application granted granted Critical
Publication of CA2516277C publication Critical patent/CA2516277C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • 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
    • 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

Abstract

A drilling system for drilling a bore hole into a subterranean earth formation, the drilling system comprising: a drill string (112) extending into the bore hole, whereby an annular space is formed between the drill sting and the bore hole wall, the drill string including a longitudinal drilling fluid passage having an outlet opening at the lower end part of the drill string; a pump (138) for pumping a drilling fluid from a drilling fluid source through the longitudinal drilling fluid passage into the annular space; a fluid discharge conduit (124) in fluid communication with said annular space for discharging said drilling fluid; a fluid back pressure system (131, 132, 133) in fluid communication with said fluid discharge conduit; said fluid backpressure system comprising a bypass (7) conduit and a three way valve (6) provided between the pump and the longitudinal drilling fluid passage, whereby the pump is in fluid communication with the fluid discharge conduit (124) via the three way valve and the bypass conduit which bypasses at least part of the longitudinal fluid passage.

Claims (8)

1. A drilling system for drilling a bore hole into a subterranean earth formation, the drilling system comprising:
a drill string extending into the bore hole, whereby an annular space is formed between the drill sting and the bore hole wall, the drill string including a longitudinal drilling fluid passage having an outlet opening at the lower end part of the drill string;
a pump for pumping a drilling fluid from a drilling fluid source through the longitudinal drilling fluid passage into the annular space;
a fluid discharge conduit in fluid communication with said annular space for discharging said drilling fluid;
a fluid back pressure system in fluid communication with said fluid discharge conduit; said fluid backpressure system comprising a bypass conduit and a three way value provided between the pump and the longitudinal drilling fluid passage, whereby the pump is in fluid communication with the fluid discharge conduit via the three way valve and the bypass conduit which bypasses at least part of the longitudinal fluid passage.
2. The drilling system according to claim 1, wherein back pressure control means is provided for controlling delivery of the drilling fluid from the pump via the bypass conduit into the discharge conduit.
3. The system according to claim 1 or 2, wherein the fluid back pressure system further comprises a variable flow restrictive device for imposing a flow restriction in a fluid passage, which flow restrictive device is on one side of the flow restriction in fluid communication with both the pump and the fluid discharge conduit.
4. The system according to any one of claims 1 to 3, wherein the three way valve is provided in a form comprising a three way fluid junction whereby a first variable flow restricting device is provided between the three way fluid junction and the longitudinal drilling fluid passage and a second variable flow restricting device is provided between the three way fluid junction and the fluid discharge conduit.
5. A method for drilling a bore hole in a subterranean earth formation, comprising:
deploying a drill string into the bore hole, whereby an annular space is formed between the drill string and the bore hole wall, the drill string including a longitudinal drilling fluid passage having an outlet opening at the lower end part of the drill string;
pumping a drilling fluid through the longitudinal drilling fluid passage into the annular space, utilizing a pump in fluid connection with a drilling fluid source;
providing a fluid discharge conduit in fluid communication with said annular space for discharging said drilling fluid;
providing a fluid back pressure system in fluid communication with said fluid discharge conduit; said fluid backpressure system comprising a bypass conduit and a three way valve provided between the pump and the longitudinal drilling fluid passage; and pressurising the fluid discharge conduit utilizing said pump by establishing a fluid communication between the pump and fluid discharge conduit via the three way valve and the bypass conduit thereby bypassing at least part of the longitudinal fluid passage.
6. The method of claim 5, wherein controlling delivery of the drilling fluid from the pump via the bypass conduit into the discharge conduit is controlled by controlling the three way valve.
7. The method of claim 5 or 6, wherein the three way valve is provided in a form comprising a three way fluid junction whereby a first variable flow restricting device is provided between the three way fluid junction and the longitudinal drilling fluid passage and a second variable flow restricting device is provided between the three way fluid junction and the fluid discharge conduit, and delivery of the drilling fluid from the pump via the bypass conduit into the discharge conduit is controlled by controlling one or both of the first and second variable flow restricting devices.
8. The method of any one of claims 5 to 7, wherein the flow of drilling fluid through the longitudinal fluid passage in the drill string is shut off and pump action of the pump is maintained for pressurising the bypass conduit.
CA2516277A 2003-02-18 2004-02-18 Dynamic annular pressure control apparatus and method Expired - Fee Related CA2516277C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US10/368,128 2003-02-18
US10/368,128 US6904981B2 (en) 2002-02-20 2003-02-18 Dynamic annular pressure control apparatus and method
NG86/2003 2003-02-19
EPPCT/EP03/08644 2003-08-01
EP0308644 2003-08-01
PCT/EP2004/050149 WO2004074627A1 (en) 2003-02-18 2004-02-18 Dynamic annular pressure control apparatus and method

Publications (2)

Publication Number Publication Date
CA2516277A1 true CA2516277A1 (en) 2004-09-02
CA2516277C CA2516277C (en) 2010-07-27

Family

ID=32987210

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2516277A Expired - Fee Related CA2516277C (en) 2003-02-18 2004-02-18 Dynamic annular pressure control apparatus and method

Country Status (12)

Country Link
US (1) US6904981B2 (en)
EP (1) EP1595057B2 (en)
CN (1) CN100343475C (en)
AR (1) AR043196A1 (en)
AU (1) AU2004213597B2 (en)
BR (1) BRPI0407538B1 (en)
CA (1) CA2516277C (en)
EG (1) EG24151A (en)
MX (1) MXPA05008753A (en)
OA (1) OA13030A (en)
RU (1) RU2336407C2 (en)
WO (1) WO2004074627A1 (en)

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EP1595057A1 (en) 2005-11-16
AU2004213597A1 (en) 2004-09-02
AU2004213597B2 (en) 2007-05-31
US20030196804A1 (en) 2003-10-23
CN100343475C (en) 2007-10-17
RU2336407C2 (en) 2008-10-20
AR043196A1 (en) 2005-07-20
BRPI0407538A (en) 2006-02-14
US6904981B2 (en) 2005-06-14
RU2005129085A (en) 2006-01-27
EP1595057B1 (en) 2006-07-19
CA2516277C (en) 2010-07-27
OA13030A (en) 2006-11-10
BRPI0407538B1 (en) 2015-05-26
EG24151A (en) 2008-08-19
WO2004074627A1 (en) 2004-09-02
MXPA05008753A (en) 2005-09-20
CN1751169A (en) 2006-03-22

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