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Current content: 157 484 516 patent documents

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147 225 new documents added

921 612 documents amended

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EP 1647668 A1 20060419 - Well stimulation

Title (en)

Well stimulation

Title (de)

Bohrlochstimulierung

Title (fr)

Stimulation de puits

Publication

EP 1647668 A1 20060419 (EN)

Application

EP 05388085 A 20051011

Priority

US 96343604 A 20041012

Abstract (en)

Methods of conducting matrix acidizing in a well in a formation by simultaneously or alternatingly injecting an acid and a diverter into the formation through tubing. The acid is injected into the formation through a first tubing and the diverter is injected into the formation through a second tubing. The second tubing may extend within said first tubing and the formation may be a chalk formation.

IPC 8 full level

E21B 43/26 (2006.01)

CPC (source: EP US)

E21B 43/27 (2020.05 - EP US)

Citation (search report)

[X] US 6367548 B1 20020409 - PURVIS DONALD L [US], et al
[X] US 5507342 A 19960416 - COPELAND DAVID L [US], et al
[A] US 3244234 A 19660405 - FLICKINGER DON H

Designated contracting state (EPC)

DE DK GB NL

DOCDB simple family (publication)

EP 1647668 A1 20060419; US 2006076134 A1 20060413

DOCDB simple family (application)

EP 05388085 A 20051011; US 96343604 A 20041012