# US 2014/0151026 A1 · Casing centralizer and method of manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151026 A1 - Document ID: US20140151026A1 - Status: Published application - Kind: A1 - Application number: 14/044,485 - Filed: 2013-10-02 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Top-Co Cementing Products Inc. - Applicants: Top-Co Cementing Products Inc. - Inventors: Gregory James Alexander Andrigo - Web page: https://patentgrep.com/patent/US20140151026A1 ## CPC - E21B 17/1078: {Stabilisers or centralisers for casing, tubing or drill pipes (E21B17/1007 - E21B17/1064 take precedence)} - E21B 17/1042: {Elastomer protector or centering means} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A casing centralizer and method according to which a body covers at least a portion of a frame. In an exemplary embodiment, the body is overmolded around the frame. In an exemplary embodiment, the casing centralizer centralizes a casing within a wellbore to facilitate oil and gas exploration and production operations. ## Claims ### Claim 1 A casing centralizer, comprising: a frame, comprising: a first tubular member defining inside and outside surfaces; a second tubular member spaced axially from the first tubular member, the second tubular member defining inside and outside surfaces; and a plurality of circumferentially-spaced ribs, wherein each rib comprises a base portion and a distal end portion that is radially offset from the base portion, wherein each of the respective base portions of the ribs is connected to each of the first and second tubular members, and wherein the ribs extend between the first and second tubular members; and a body, comprising: a first portion that covers the respective distal end portions of the ribs so that the respective distal end portions are disposed radially between the first portion of the body and the first tubular member; and a second portion that covers the respective inside surfaces of the first and second tubular members so that the respective inside surfaces of the first and second tubular members are disposed radially between the respective outside surfaces of the first and second tubular members and the second portion of the body; wherein the frame is composed of a first material; and wherein the body is composed of a second material that is different from the first material. ### Claim 2 (depends on 1) The casing centralizer of claim 1, wherein the first material comprises a metallic material; and wherein the second material comprises a non-metallic material. ### Claim 3 (depends on 1) The casing centralizer of claim 1, wherein the body covers substantially the entire frame. ### Claim 4 (depends on 3) The casing centralizer of claim 3, wherein the body is overmolded around the frame. ### Claim 5 (depends on 1) The casing centralizer of claim 1, wherein the first portion of the body comprises a plurality of vane portions, each of which covers one of the respective distal end portions of the ribs. ### Claim 6 (depends on 5) The casing centralizer of claim 5, wherein the ribs are embedded in respective ones of the vane portions. ### Claim 7 (depends on 1) The casing centralizer of claim 1, wherein the second portion of the body also covers the respective outside surfaces of the first and second tubular members. ### Claim 8 (depends on 1) The casing centralizer of claim 1, wherein the first portion of the body comprises a plurality of vane portions, each of which extends between the first and second tubular members and covers one of the respective distal end portions of the ribs. ### Claim 9 (depends on 8) The casing centralizer of claim 8, wherein each of the vane portions extends between the first and second tubular members either spirally or along a straight line; and wherein each of the ribs extends between the first and second tubular members either spirally or along a straight line. ### Claim 10 (depends on 1) The casing centralizer of claim 1, wherein the frame further comprises: a first plurality of openings formed in the first tubular member; a second plurality of openings formed in the second tubular member; and at least one of the following: a third plurality of openings formed through each of the ribs; and a plurality of notches formed in each of the ribs. ### Claim 11 A casing centralizer, comprising: a frame, comprising: axially-spaced first and second tubular members; and a plurality of circumferentially-spaced bars connected to each of the first and second tubular members and extending therebetween; and a body overmolded around the frame; wherein the frame is composed of a first material; and wherein the body is composed of a second material that is different from the first material. ### Claim 12 (depends on 11) The casing centralizer of claim 11, wherein the first material comprises a metallic material; and wherein the second material comprises a non-metallic material. ### Claim 13 (depends on 11) The casing centralizer of claim 11, wherein each of the bars comprises a rib, the rib comprising a base portion and a distal end portion that is radially offset from the base portion; and wherein each of the base portions is connected to each of the first and second tubular members. ### Claim 14 (depends on 13) The casing centralizer of claim 13, wherein the first portion of the body comprises a plurality of vane portions, each of which covers one of the respective distal end portions of the ribs; and wherein the body comprises a second portion that covers the respective outside surfaces of the first and second tubular members and that covers the respective inside surfaces of the first and second tubular members. ### Claim 15 (depends on 14) The casing centralizer of claim 14, wherein each of the vane portions extends between the first and second tubular members either spirally or along a straight line; and wherein each of the ribs extends between the first and second tubular members along a straight line. ### Claim 16 (depends on 13) The casing centralizer of claim 13, wherein the frame further comprises: a first plurality of openings formed in the first tubular member; a second plurality of openings formed in the second tubular member; and at least one of the following: a third plurality of openings formed through each of the ribs; and a plurality of notches formed in each of the ribs. ### Claim 17 A method of manufacturing a casing centralizer, the method comprising: providing a frame composed of at least a first material, wherein providing the frame comprises: providing a first tubular member; spacing a second tubular member axially from the first tubular member; and connecting a plurality of circumferentially-spaced bars to the first and second tubular members so that the bars extend between the first and second tubular members; and overmolding the frame so that a body is formed around the frame, the body being composed of at least a second material, the second material being different from the first material. ### Claim 18 (depends on 17) The method of claim 17, wherein the first material comprises a metallic material; and wherein the second material comprises a non-metallic material. ### Claim 19 (depends on 17) The method of claim 17, wherein each of the bars comprises a rib, the rib comprising a base portion and a distal end portion that is radially offset from the base portion; and wherein each of the base portions is connected to each of the first and second tubular members. ### Claim 20 (depends on 19) The method of claim 19, wherein the frame is overmolded so that: a first portion of the body is formed, the first portion comprising a plurality of vane portions, each of which covers one of the respective distal end portions of the ribs; and a second portion of the body is formed, the second portion covering the respective outside surfaces of the first and second tubular members and the respective inside surfaces of the first and second tubular members.