# US 2019/0169943 A1 · Composite Bow Centralizer

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0169943 A1
- Document ID: US20190169943A1
- Status: Published application
- Kind: A1
- Application number: 16/268,668
- Filed: 2019-02-06
- Published: 2019-06-06
- Earliest claimed: 2011-01-25
- Assignees: Halliburton Energy Services, Inc.
- Applicants: Halliburton Energy Services, Inc.
- Inventors: Glenn LIVELY; David LEVIE; Dietmar MUELLER; Thorsten WEBER
- Web page: https://patentgrep.com/patent/US20190169943A1

## CPC

- E21B 17/1078: {Stabilisers or centralisers for casing, tubing or drill pipes (E21B17/1007 - E21B17/1064 take precedence)}
- B29C 35/02: 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})
- B29C 53/56: Winding and joining, e.g. winding spirally {(winding in general B65H)}
- B29C 70/88: characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
- B29C 71/0072: {for changing orientation}
- E21B 17/1021: {with articulated arms or arcuate springs}
- E21B 17/1028: {with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations}
- E21B 17/1085: {Wear protectors; Blast joints; Hard facing}
- B29K 2101/00: Use of unspecified macromolecular compounds as moulding material {(use of unspecified rubbers B29K2021/00)}
- B29K 2105/246: {Uncured, e.g. green}
- B29L 2023/003: {having irregular or rough surfaces}
- B29L 2031/772: {Articles characterised by their shape and not otherwise provided for (closed loop B29L2031/709; ring-like B29L2031/7096; corrugated B29L2016/00, flat B29L2007/00; hollow B29L2022/00; screw-threaded B29L2001/00; toothed B29L2031/775; corrugated tubes B29L2023/18)}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## 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.

## Claims

### Claim 1

A centralizer 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.

### Claim 2 (depends on 1)

The centralizer of claim 1, wherein the centralizer is further produced from the process comprising: disposing a plurality of particulates on an outer surface of the composite bow springs.

### Claim 3 (depends on 2)

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

### Claim 4 (depends on 1)

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

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 6)

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.

### Claim 8 (depends on 6)

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.

### Claim 9 (depends on 1)

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.