Global patent index - EP 1062405 A1

EP 1062405 A1 2000-12-27 - EXTRACTION OF FLUIDS FROM WELLS

Title (en)

EXTRACTION OF FLUIDS FROM WELLS

Title (de)

FÖRDERUNG VON BOHRLOCHFLÜSSIGKEITEN

Title (fr)

EXTRACTION DE FLUIDES DES PUITS

Publication

EP 1062405 A1 (EN)

Application

EP 99907771 A

Priority

  • GB 9900738 W
  • GB 9805472 A

Abstract (en)

[origin: GB2335216A] A control system (106) is provided for controlling the flow of hydrocarbons out of a production well. The control system has hydraulic decoders which operate a plurality of chokes. The hydraulic decoders (124) provide actuation signals on receiving hydraulic control pressures within predetermined ranges. The actuation signals operate a hydraulic actuator (120) to open or close a particular choke. In this way chokes can be operated independently. Hydraulic control lines (128) are consolidated by a shuttle valve (134) into a single control line (136). Valves (138) (140) are configured so that, in the absence of control supply (136), valve (138) is closed and valve (140) is open. Valve (138) opens at 1,000 psi and, since valve (140) is open, hydraulic power supply (148) is transmitted through decoder (124) to operate actuator (120) and thus the choke. When the pressure increases above 1200 psi the valve (140) closes. Valves (142) (144) are operated by a pressure between 1500 psi and 1700 psi so that the actuator can move the choke in the opposite direction.

IPC 1-7 (main, further and additional classification)

E21B 43/12; E21B 34/06; E21B 34/10

IPC 8 full level (invention and additional information)

E21B 33/035 (2006.01); E21B 34/06 (2006.01); E21B 34/10 (2006.01); E21B 34/16 (2006.01); E21B 43/12 (2006.01); E21B 43/14 (2006.01)

CPC (invention and additional information)

E21B 43/12 (2013.01); E21B 33/0355 (2013.01); E21B 34/06 (2013.01); E21B 34/066 (2013.01); E21B 34/10 (2013.01); E21B 34/16 (2013.01); E21B 43/14 (2013.01)

Citation (search report)

See references of WO 9947790A1

Designated contracting state (EPC)

DE FR

EPO simple patent family

GB 2335216 A 19990915; GB 9823582 D0 19981223; AU 2740099 A 19991011; BR 9908712 A 20011002; DE 69908757 D1 20030717; EP 1062405 A1 20001227; EP 1062405 B1 20030611; GB 2335215 A 19990915; GB 2335215 B 20020724; GB 9805472 D0 19980513; NO 20004549 A 20001113; NO 20004549 D0 20000912; NO 329263 B1 20100920; WO 9947790 A1 19990923

INPADOC legal status

2012-01-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Effective date: 20110331

2011-12-23 [REG FR ST] NOTIFICATION OF LAPSE

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- Effective date: 20111130

2010-05-31 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20100406

- Year of fee payment: 12

2005-03-04 [REG FR CD] CHANGE OF NAME OR COMPANY NAME

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2004-06-02 [26N] NO OPPOSITION FILED

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- Effective date: 20040312

2004-04-23 [ET] FR: TRANSLATION FILED

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2003-09-12 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Effective date: 20030912

2003-07-17 [REF] CORRESPONDS TO:

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2003-06-11 [AK] DESIGNATED CONTRACTING STATES:

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2001-09-26 [17Q] FIRST EXAMINATION REPORT

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2000-12-27 [17P] REQUEST FOR EXAMINATION FILED

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2000-12-27 [AK] DESIGNATED CONTRACTING STATES:

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- Designated State(s): DE FR