# US 2021/0340840 A1 · Cementing high-loss zones > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0340840 A1 - Document ID: US20210340840A1 - Status: Published application - Kind: A1 - Application number: 16/863,669 - Filed: 2020-04-30 - Published: 2021-11-04 - Earliest claimed: 2020-04-30 - Assignees: Saudi Arabian Oil Company - Applicants: Saudi Arabian Oil Company - Inventors: Bandar S. Al-Malki; Asim Alkhuwayr; Ismail Adebiyi; Yousef H. Dahnem - Web page: https://patentgrep.com/patent/US20210340840A1 ## CPC - E21B 33/138: Plastering the borehole wall; Injecting into the formation - E21B 33/16: using plugs for isolating cement charge; Plugs therefor {(stage cementing E21B33/146; spacer compositions C09K8/424)} - E21B 33/1204: {permanent; drillable} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A non-metallic tubular defines a central flow passage. Actuable rollers are actuable between an extended position and a retracted position. The actuable rollers are pivotally attached to the non-metallic tubular. The actuable rollers centralize the non-metallic tubular when in the extended position. The actuable rollers extend between the non-metallic tubular to an inner surface of the wellbore when in the extended position. A connector is attached to an uphole end of the non-metallic tubular. The connector is configured to attach to a downhole end of a work string. ## Claims ### Claim 1 A wellbore tool comprising: a non-metallic tubular defining a central flow passage; actuable rollers actuable between an extended position and a retracted position, the actuable roller pivotally attached to the non-metallic tubular, the actuable rollers centralizing the non-metallic tubular when in the extended position, the actuable rollers extending between the non-metallic tubular to an inner surface of the wellbore when in the extended position; and a connector attached to an uphole end of the non-metallic tubular, the connector configured to attach to a downhole end of a work string. ### Claim 2 (depends on 1) The wellbore tool of claim 1, wherein the non-metallic tubular comprises a plastic. ### Claim 3 (depends on 1) The wellbore tool of claim 1, wherein the wellbore tool further comprises an actuator to actuate the actuable rollers between the extended position and the retracted position. ### Claim 4 (depends on 3) The wellbore tool of claim 3, wherein the actuator comprises a ball seat trigger. ### Claim 5 (depends on 1) The wellbore tool of claim 1, wherein the connector or the non-metallic tubular have a lower yield strength than the work string. ### Claim 6 A method comprising: receiving a non-metallic tubular by a wellbore; receiving, by central flow passage of the non-metallic tubular, cement; emitting the cement from a downhole end of the non-metallic tubular; and forming a cement plug from the emitted cement to plug a high loss zone by the cement or to spot a conventional cement plug. ### Claim 7 (depends on 6) The method of claim 6, further comprising: flash-setting the cement plug retaining the non-metallic tubular within the cement plug. ### Claim 8 (depends on 7) The method of claim 7, further comprising: rotating a metallic work string uphole of and attached to the non-metallic tubular; shearing the non-metallic tubular, or a connector retaining the non-metallic tubular to the work string, responsive to rotating the metallic work string; retracting the metallic work string from the wellbore; and leaving the non-metallic tubular within the wellbore. ### Claim 9 (depends on 8) The method of claim 8, further comprising drilling through the cement plug and the non-metallic tubular that remains within the wellbore. ### Claim 10 (depends on 6) The method of claim 6, further comprising removing the non-metallic tubular from the wellbore. ### Claim 11 (depends on 10) The method of claim 10, further comprising receiving the non-metallic tubular by a second wellbore different from the wellbore. ### Claim 12 (depends on 6) The method of claim 6, further comprising centralizing the non-metallic tubular by actuable rollers. ### Claim 13 (depends on 12) The method of claim 12, wherein centralizing the non-metallic tubular comprises actuating the actuable rollers by circulating a ball within the non-metallic tubular. ### Claim 14 (depends on 13) The method of claim 13, wherein actuating the actuable rollers comprises actuating between an extended position and a retracted position, the actuable rollers centralizing the non-metallic tubular when in the extended position. ### Claim 15 A well system comprising; a metallic work string; a non-metallic tubular defining a central flow passage; actuable rollers actuable between an extended position and a retracted position, the actuable roller pivotally attached to the non-metallic tubular, the actuable rollers extending between the non-metallic tubular to an inner surface of the wellbore when in the extended position; and a connector attached to an uphole end of the non-metallic tubular, the connector configured to attach to a downhole end of the work string. ### Claim 16 (depends on 15) The well system of claim 15, wherein the non-metallic tubular comprises a plastic. ### Claim 17 (depends on 15) The well system of claim 15, wherein the well system further comprises an actuator to actuate the actuable rollers between the extended position and the retracted position. ### Claim 18 (depends on 17) The well system of claim 17, wherein the actuator comprises a ball seat trigger. ### Claim 19 (depends on 15) The well system of claim 15, wherein the non-metallic tubular is configured to be removed from the metallic work string by torsional shearing. ### Claim 20 (depends on 15) The well system of claim 15, wherein the non-metallic tubular and the actuable rollers are configured to be drilled out of a wellbore when the non-metallic tubular becomes stuck in a wellbore. ### Claim 21 (depends on 15) The well system of claim 15, wherein the metallic work string comprises coiled tubing.