Composite bow centralizer

Patent metadata

Field	Value
Publication number	US-10676996-B2
Application number	US-201916268668-A
Country	US
Kind code	B2
Filing date	Feb 6, 2019
Priority date	Jan 25, 2011
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A centralizer can be produced from a process comprising forming a plurality of composite bow spring from a fiber and a resin, curing the composite bow springs in a desired shape to form a plurality of cured bow springs, disposing a first portion of a resin-wetted fiber about a cylindrical mandrel to form a plurality of collars, disposing the plurality of cured bow springs onto the mandrel with the bow spring ends in contact with the first portion of resin-wetted fiber, disposing a second portion of the resin-wetted fiber about the cylindrical mandrel, curing the collars to form a cured centralizer, and pressing the mandrel out of the cured centralizer.

First claim

What is claimed is:

1. A centralizer produced from a process comprising:
forming a plurality of composite bow spring from a fiber and a resin;
disposing a plurality of particulates on an outer surface of at least one of the composite bow springs;
curing the composite bow springs in a desired shape to form a plurality of cured bow springs;
disposing a first portion of a resin-wetted fiber about a cylindrical mandrel to form a plurality of collars;
disposing the plurality of cured bow springs onto the mandrel with the bow spring ends in contact with the first portion of resin-wetted fiber;
disposing a second portion of the resin-wetted fiber about the cylindrical mandrel;
curing the collars to form a cured centralizer; and
pressing the mandrel out of the cured centralizer.

2. The centralizer of claim 1 , wherein the plurality of particulates are coated with a surface coating agent.

3. The centralizer of claim 2 , wherein the particulates comprise a metal or a ceramic.

4. The centralizer of claim 1 , wherein the fiber comprise a glass fiber, a cellulosic fiber, a carbon fiber, a graphite fiber, a metal fiber, a ceramic fiber, a metallic-ceramic fiber, an aramid fiber, or any combination thereof.

5. The centralizer of claim 1 , wherein the resin comprises at least one component selected from the group consisting of: an orthophthalic polyester, an isophthalic polyester, a phthalic/maelic type polyester, a vinyl ester, a thermosetting epoxy, a phenolic, a cyanate, a bismaleimide, a nadic end-capped polyimide, a polysulfone, a polyamide, a polycarbonate, a polyphenylene oxide, a polysulfide, a polyether ether ketone, a polyether sulfone, a polyamide-imide, a polyetherimide, a polyimide, a polyarylate, a liquid crystalline polyester, a polyurethane, a polyurea, and any combinations thereof.

6. The centralizer of claim 1 , wherein the resin comprises a hardenable resin and a hardening agent.

7. The centralizer of claim 6 , wherein the hardenable resin comprises at least one component selected from the group consisting of: a bisphenol A diglycidyl ether resin, a butoxymethyl butyl glycidyl ether resin, a bisphenol A-epichlorohydrin resin, a bisphenol F resin, a polyepoxide resin, a novolak resin, a polyester resin, a phenol-aldehyde resin, a urea-aldehyde resin, a furan resin, a urethane resin, a glycidyl ether resin, and any combinations thereof.

8. The centralizer of claim 6 , wherein the hardening agent comprises at least one component selected from the group consisting of: a cyclo-aliphatic amine, an aromatic amine, an aliphatic amine, an imidazole, a pyrazole, a pyrazine, a pyrimidine, a pyridazine, a 1H-indazole, a purine, a phthalazine, a naphthyridine, a quinoxaline, a quinazoline, a phenazine, an imidazolidine, a cinnoline, an imidazoline, a 1,3,5-triazine, a thiazole, a pteridine, an indazole, an amine, a polyamine, an amide, a polyamide, a 2-ethyl-4-methyl imidazole, and any combinations thereof.

9. The centralizer of claim 1 , wherein the fiber is coated with a surface coating agent, and wherein the surface coating agent comprises at least one compound selected from the group consisting of: a silazane, a siloxane, an alkoxysilane, an aminosilane, a silane, a silanol, a polyvinyl alcohol, and any combination thereof.

Assignees

• Halliburton Energy Services Inc

Inventors

• Lively Glenn
• Levie David
• Mueller Dietmar
• Weber Thorsten

Classifications

• B29C70/88

  characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced · CPC title

• B29C35/02

  Heating or curing, e.g. crosslinking or vulcanizing {during moulding, e.g. in a mould}(cold vulcanisation B29C35/18 {; vulcanising tyres, presses therefor B29D30/0601}) · CPC title

• B29C71/0072

  for changing orientation · CPC title

• E21B17/1078 Primary

  Stabilisers or centralisers for casing, tubing or drill pipes (E21B17/1007 - E21B17/1064 take precedence) · CPC title

• E21B17/1021

  with articulated arms or arcuate springs · CPC title