Method of repairing a wellbore liner for sand control

• US 5,154,230 A
• Filed: 12/17/1991
• Issued: 10/13/1992
• Est. Priority Date: 07/21/1989
• Status: Expired due to Term

• Current Assignee: Anadarko US Offshore LLC
• Original Assignee: Oryx Energy Co. (Occidental Petroleum Corporation)
• Inventors: Dees, John M.
• Primary Examiner(s): Suchfield, George A.
• Application Number:
  US07/808,866
• Time in Patent Office: 301 Days
• Field of Search: 166/63, 166/276, 166/277, 166/295, 166/297, 166/299, 166/300, 166/288
• US Class Current: 166/277
• CPC Class Codes: C09K 8/52 Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
• CPC Class Codes: C09K 8/54 Compositions for in situ inhibition of corrosion in boreholes or wells
• CPC Class Codes: C09K 8/56 Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof compositions for plastering borehole walls C09K8/50; Soil-conditioning materials or soil-stabilising materials in general C09K17/00
• CPC Class Codes: C09K 8/5755 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C09K 8/60 Compositions for stimulating production by acting on the underground formation
• CPC Class Codes: E21B 27/02 Dump bailers, i.e. containers for depositing substances, e.g. cement or acids
• CPC Class Codes: E21B 37/06 using chemical means for preventing or limiting , e.g. eliminating, the deposition of paraffins or like substances
• CPC Class Codes: E21B 41/02 in situ inhibition of corrosion in boreholes or wells
• CPC Class Codes: E21B 43/025 Consolidation of loose sand or the like round the wells without excessively decreasing the permeability thereof
• CPC Class Codes: E21B 43/25 Methods for stimulating production by vibrating earth formations E21B43/003

Abstract

In a well treatment method, a fluid is positioned in a wellbore have formation perforations in alignment with the portion thereof to be treated. A gas generator is positioned in proximity with the fluid and is actuated to disperse the fluid within the wellbore in accordance with a pressure/time relationship. In the preferred embodiment of the invention, the fluid is a fluid resin material which is polymerized following operation of the gas generator to form a consolidated, porous, permeable matrix which retains sand and other fine materials while permitting the flow of production fluid into the well.

Claims

1. A method of repairing a damaged wellbore liner for controlling sand and other fine materials comprising the steps of:

(a) positioning a quantity of fluid resin material in alignment with the portion of the wellbore liner to be repaired;

(b) positioning a gas generator in proximity with the fluid resin material;

(c) actuating the gas generator to increase wellbore pressure in a substantially instantaneous manner to a pressure substantially in excess of well pressure to force the fluid resin material from the wellbore into the damaged area of the wellbore liner; and

(d) subsequently polymerizing the resin material to form a consolidated, porous permeable matrix that allows the flow of production fluid into the well while preventing the flow of sand, or other fine materials into the well through the previously damaged area of the wellbore liner.

2. The method of repairing a damaged wellbore liner in accordance with claim 1 wherein the fluid resin material is a furan resin.

3. The method of repairing a damaged wellbore liner in accordance with claim 1 wherein the fluid resin material is internally catalyzed.