EP1646701A2 - Boues de forage ameliorees - Google Patents

Boues de forage ameliorees

Info

Publication number
EP1646701A2
EP1646701A2 EP03787022A EP03787022A EP1646701A2 EP 1646701 A2 EP1646701 A2 EP 1646701A2 EP 03787022 A EP03787022 A EP 03787022A EP 03787022 A EP03787022 A EP 03787022A EP 1646701 A2 EP1646701 A2 EP 1646701A2
Authority
EP
European Patent Office
Prior art keywords
drilling fluid
crumb rubber
drilling
particles
fluid
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.)
Withdrawn
Application number
EP03787022A
Other languages
German (de)
English (en)
Inventor
Robert R. NER International WOOD
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.)
Ner International
Original Assignee
Ner International
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ner International filed Critical Ner International
Publication of EP1646701A2 publication Critical patent/EP1646701A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02—Well-drilling compositions
    • C09K8/03—Specific additives for general use in well-drilling compositions
    • C09K8/035—Organic additives

Definitions

  • U.S. Pat. No. 3,448,800 discloses another lost circulation method wherein a water soluble polymer is slurried in a nonaqueous medium and injected into a well. An aqueous slurry of a mineral material such as barite, cement or plaster of paris is subsequently injected into the well to mix with the first slurry to form a cement-like plug in the well bore.
  • a water soluble polymer is slurried in a nonaqueous medium and injected into a well.
  • An aqueous slurry of a mineral material such as barite, cement or plaster of paris is subsequently injected into the well to mix with the first slurry to form a cement-like plug in the well bore.
  • U.S. Pat. No. 4,261,422 describes the use of an expandable clay such as bentonite or montmorillonite which is dispersed in a liquid hydrocarbon for injection into the well. After injection, the bentonite or montmorillonite will expand upon contact with water in the formation. Thus, it is hoped that the expanding clay will close off water producing intervals but not harm oil producing intervals.
  • a similar method is disclosed in U.S. Pat. No. 3,078,920 which uses a solution of polymerized methacrylate dissolved in a nonaqueous solvent such as acetic acid, acetic anhydride, propionic acid and liquid aliphatic ketones such as acetone and methyl-ethyl ketone. The methacrylate will expand upon contact with formation water in the water-producing intervals of the well.
  • U.S. Pat. Nos. 4,503,170; 4,475,594; 4,445,576; 4,442,241 and 4,391 ,925 teach the use of a water expandable clay dispersed in the oily phase of a water-in-oil emulsion containing a surfactant to stabilize the emulsion and a polymer dispersed in the aqueous phase. When the emulsion is sheared, it breaks and a bentonite paste is formed which hardens into a cement-like plug.
  • the patent discloses the use of such polymers as polyacrylamide, polyethylene oxide and copolymers of acrylamide and acrylic or methacrylic acid.
  • Oleophilic polymers for separating oil from water which show significant swelling in volume upon absorption of oil are described in U.S. Pat. No. 4,172,031. These polymers include polymers of styrenes and substituted styrenes, polyvinyl chloride copolymers of vinylchloride such as a copolymer of 60 wt % vinylchlori.de and 40 wt % vinylacetate, polymers and copolymers of vinylidene chloride and acrylonitrile, and acrylic polymers such as polymers of methylmethacrylate and ethylacrylate, styrene and divinylbenzene copolymers and alkyl styrene polymers and copolymers.
  • the reference discloses that these polymers show significant swelling in volume upon absorption of oil.
  • the invention relates to an improved additive for a drilling fluid which significantly reduces the loss of fluid to the surrounding subterranean structure while maintaining the lubricity of the drilling fluid.
  • the novel additive comprises finely ground elastomer particles.
  • Loss of drilling fluid occurs when drilling fluid seeps into the subterranean formation through holes, fractures or fissures in the formation.
  • the region in the well where this occurs is referred to as the lost circulation zone.
  • elastomer particles When elastomer particles are added to a drilling fluid, they form a seal in the lost circulation zone by expanding in size to seal the fractures or fissures. This prevents further loss of drilling fluid into the formation.
  • the drilling fluid additive of the present invention comprise particles of elastomers which exhibit swelling when contacted with hydrocarbon fluids, yet do not dissolve in hydrocarbon fluids. This can be achieved by using crosslinlced elastomers which swell but do not dissolve in the presence of a hydrocarbon fluid.
  • the swelling elastomers are such that little, if any, swelling occurs until the polymer has reached the lost circulation zone in the well to be sealed. This is accomplished without resort to coatings on the polymer or suspending the polymer with aqueous pill.
  • test tubes were removed from the test cells and the height of the rubber was measured. The amount of expansion was calculated using the formula ("height after aging / 33) -1.” The results are reported in Tables 1 and 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Sealing Material Composition (AREA)

Abstract

L'invention concerne un nouvel additif de boues de forage contenant des particules d'élastomère qui peuvent gonfler suite à un contact avec un fluide d'hydrocarbures. Le gonflement de l'élastomère est graduel, ce qui permet à l'élastomère d'atteindre la zone de circulation perdue, avant qu'un gonflement important ne se produise. Une fois dans la zone de circulation perdue, le polymère se dilate et ferme donc hermétiquement la zone de circulation perdue. Cette invention a aussi trait à un procédé de prévention de perte de boues de forage.
EP03787022A 2002-11-22 2003-11-21 Boues de forage ameliorees Withdrawn EP1646701A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42847502P 2002-11-22 2002-11-22
PCT/US2003/037398 WO2004063305A2 (fr) 2002-11-22 2003-11-21 Boues de forage ameliorees

Publications (1)

Publication Number Publication Date
EP1646701A2 true EP1646701A2 (fr) 2006-04-19

Family

ID=32712965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03787022A Withdrawn EP1646701A2 (fr) 2002-11-22 2003-11-21 Boues de forage ameliorees

Country Status (4)

Country Link
EP (1) EP1646701A2 (fr)
AU (1) AU2003295812A1 (fr)
CA (1) CA2518747A1 (fr)
WO (1) WO2004063305A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8043997B2 (en) 2008-02-29 2011-10-25 Halliburton Energy Services Inc. Lost circulation material formulation and method of use
US9458320B2 (en) * 2013-09-18 2016-10-04 Innovative Polymer Solutions, Inc. Pre-swelled ground tire rubber and methods of making and using the same
WO2024233340A1 (fr) * 2023-05-05 2024-11-14 Schlumberger Technology Corporation Additifs de fluide de puits de forage, fluides de puits de forage comprenant lesdits additifs, et procédés de renforcement de puits de forage à l'aide desdits fluides

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743233A (en) * 1952-01-03 1956-04-24 Phillips Petroleum Co Oil-base drilling muds and methods of drilling with same
US2894906A (en) * 1953-12-23 1959-07-14 Shell Dev Drilling fluid composition for porous formations
US6380269B1 (en) * 1999-06-09 2002-04-30 The Goodyear Tire & Rubber Company Surface devulcanization of cured rubber crumb
AU2001231075A1 (en) * 2000-01-24 2001-07-31 Robert R. Wood Improved drilling fluids

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004063305A3 *

Also Published As

Publication number Publication date
WO2004063305A3 (fr) 2004-12-16
WO2004063305A2 (fr) 2004-07-29
AU2003295812A8 (en) 2004-08-10
AU2003295812A1 (en) 2004-08-10
CA2518747A1 (fr) 2004-07-29

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