Global Patent Index - EP 1257727 A1

EP 1257727 A1 2002-11-20 - METHOD OF TREATING RESERVOIR ZONE OF HYDROCARBON PRODUCING WELL TO INHIBIT WATER PRODUCTION PROBLEMS

Title (en)

METHOD OF TREATING RESERVOIR ZONE OF HYDROCARBON PRODUCING WELL TO INHIBIT WATER PRODUCTION PROBLEMS

Title (de)

VERFAHREN ZUR BEHANDLUNG DER RESERVOIRZONE EINES ÖLPRODUKTIONSBOHRLOCH ZUR VERRINGERUNG VON WASSERZUFLUSSPROBLEMEN

Title (fr)

PROCEDE DE TRAITEMENT D'UNE ZONE DE RESERVOIR D'UN PUITS DE PRODUCTION D'HYDROCARBURES AFIN D'EVITER LES PROBLEMES DE PRODUCTION D'EAU

Publication

EP 1257727 A1 (EN)

Application

EP 01951158 A

Priority

  • GB 0100495 W
  • GB 0003214 A

Abstract (en)

[origin: GB2359104A] A method of treating an oil well to inhibit scale formation. An oil soluble scale inhibitor (e.g. a penta-phosphate derivative) in a hydrocarbon phase (e.g. kerosene, lamp oil, diesel or crude oil) is injected into the well during the completion phase. The inhibitor hydrolyses on contact with connate water in the well and the active part enters the water phase. It remains in the water phase while oil is extracted and until the water breaks through. At that stage, the inhibitor becomes active in inhibiting scale formation.

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

E21B 37/06; E21B 33/138

IPC 8 full level (invention and additional information)

C09K 8/502 (2006.01); C09K 8/528 (2006.01); E21B 37/06 (2006.01)

CPC (invention and additional information)

C09K 8/528 (2013.01); C09K 8/502 (2013.01); E21B 37/06 (2013.01)

Citation (search report)

See references of WO 0159255A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

GB 0003214 D0 20000405; GB 2359104 A 20010815; AR 027408 A1 20030326; AU 7206001 A 20010820; BR 0108245 A 20021105; EG 23023 A 20040131; EP 1257727 A1 20021120; NO 20023772 A 20021010; NO 20023772 D0 20020809; PE 10172001 A1 20010921; US 2003155123 A1 20030821; WO 0159255 A1 20010816

INPADOC legal status


2005-10-26 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20050420

2005-01-26 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20041209

2003-02-12 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: WAT, REX, MAN, SHING

2003-02-12 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: KOTLAR, HANS, KRISTIAN

2002-11-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020911

2002-11-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-11-20 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI