# US 11,078,760 B2 · Determination of wellbore condition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,078,760 B2 - Document ID: US11078760B2 - Status: Granted - Kind: B2 - Application number: 16/521,227 - Filed: 2019-07-24 - Published: 2021-01-28 - Granted: 2021-08-03 - Earliest claimed: 2019-07-24 - Assignees: Chevron U.S.A. Inc. - Applicants: Chevron U.S.A. Inc. - Inventors: Namig Khochbar; Raafat Z. Abbas; Emre Doruk Tanyel; Johan C. Delgado - Web page: https://patentgrep.com/patent/US11078760B2 ## CPC - E21B 43/10: Setting of casings, screens, liners {or the like} in wells - E21B 37/00: Methods or apparatus for cleaning boreholes or wells (E21B21/00 takes precedence) - E21B 41/00: Equipment or details not covered by groups E21B15/00 - E21B40/00 - E21B 47/00: Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B21/08) - G01N 19/02: Measuring coefficient of friction between materials {(testing of tyres G01M17/02; determinations of friction coefficient used in vehicle braking or traction control systems B60T8/172)} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract Pullout information for a drilling tool may be obtained. The pullout information may characterize one or more operating characteristics of the drilling tool during pullout of the drilling tool from the wellbore. A pullout friction factor for the wellbore may be determined based on the pullout information. A comparison of the pullout friction factor to a pullout friction factor threshold may be performed to determine whether the pullout friction factor satisfies or violates the pullout friction factor threshold. The condition of the wellbore to run the casing into the wellbore may be determined based on whether the pullout friction factor satisfies or violates the pullout friction factor threshold. ## Claims ### Claim 1 A system that determines condition of a wellbore to run a casing into the wellbore for extraction of petrochemical fluid or fluid injection, the system comprising: one or more physical processors configured by machine-readable instructions to: obtain pullout information for a drilling tool, the pullout information characterizing one or more operating characteristics of the drilling tool during pullout of the drilling tool from the wellbore; determine a pullout friction factor for the wellbore based on the pullout information; perform a comparison of the pullout friction factor to a pullout friction factor threshold to determine whether the pullout friction factor satisfies or violates the pullout friction factor threshold, the pullout friction factor threshold determined based on historical information on success of casing runs after drilling tool pullouts with different values of the pullout friction factor; determine the condition of the wellbore to run the casing into the wellbore based on whether the pullout friction factor satisfies or violates the pullout friction factor threshold; and responsive to the pullout friction factor satisfying the pullout friction factor threshold, effectuate running the casing into the wellbore. ### Claim 2 (depends on 1) The system of claim 1, wherein the one or more physical processors are further configured by the machine-readable instructions to: responsive to the pullout friction factor violating the pullout friction factor threshold, effectuate cleaning of the wellbore. ### Claim 3 (depends on 2) The system of claim 2, wherein cleaning of the wellbore is performed by tripping into the wellbore and applying one or more wellbore-cleaning parameters. ### Claim 4 (depends on 1) The system of claim 1, wherein the wellbore includes a lateral portion. ### Claim 5 (depends on 4) The system of claim 4, wherein the drilling tool includes a drill string. ### Claim 6 (depends on 5) The system of claim 5, wherein: the one or more operating characteristics of the drilling tool includes a curve of measured hookload of the drill string during pullout of the drill string from the lateral portion of the wellbore; and the determination of the pullout friction factor includes comparison of the curve of the measured hookload of the drilling tool during pullout of the drilling tool from the wellbore with curves of predicted hookload of the drilling tool during pullout of the drilling tool from the wellbore, separate ones of the curves of the predicted hookload generated based on separate values of the pullout friction factor, the curves of the predicted hookload including a first curve of the predicted hookload generated based on a first value of the pullout friction factor and a second curve of the predicted hookload generated based on a second value of the pullout friction factor, wherein a value of the pullout friction factor is determined to be between the first value and the second value based on the curve of the measured hookload falling between the first curve of the predicted hookload corresponding to the first value of the pullout friction factor and the second curve of the predicted hookload corresponding to the second value of the pullout friction factor. ### Claim 7 (depends on 6) The system of claim 6, wherein the pullout friction factor is determined further based on one or more physical properties of the drill string, the one or more physical properties of the drill string including one or more of shape, size, weight, and/or material of the drill string. ### Claim 8 (depends on 7) The system of claim 7, wherein the pullout friction factor is determined further based on one or more physical properties of the wellbore and one or more fluid properties inside the wellbore. ### Claim 9 (depends on 1) The system of claim 1, wherein the success of the casing runs is determined based on depth reached by the casing runs. ### Claim 10 (depends on 1) The system of claim 1, wherein the success of the casing runs is determined based on whether or not the casing runs experienced stuck casing or damaged casing before reaching a target position. ### Claim 11 A method for determining condition of a wellbore to run a casing into the wellbore for extraction of petrochemical fluid or fluid injection, the method comprising: obtaining pullout information for a drilling tool, the pullout information characterizing one or more operating characteristics of the drilling tool during pullout of the drilling tool from the wellbore; determining a pullout friction factor for the wellbore based on the pullout information; performing a comparison of the pullout friction factor to a pullout friction factor threshold to determine whether the pullout friction factor satisfies or violates the pullout friction factor threshold, the pullout friction factor threshold determined based on historical information on success of casing runs after drilling tool pullouts with different values of the pullout friction factor; determining the condition of the wellbore to run the casing into the wellbore based on whether the pullout friction factor satisfies or violates the pullout friction factor threshold; and responsive to the pullout friction factor satisfying the pullout friction factor threshold, effectuating running the casing into the wellbore. ### Claim 12 (depends on 11) The method of claim 11, further comprising: responsive to the pullout friction factor violating the pullout friction factor threshold, effectuating cleaning of the wellbore. ### Claim 13 (depends on 12) The method of claim 12, wherein cleaning of the wellbore is performed by tripping into the wellbore and applying one or more wellbore-cleaning parameters. ### Claim 14 (depends on 11) The method of claim 11, wherein the wellbore includes a lateral portion. ### Claim 15 (depends on 14) The method of claim 14, wherein the drilling tool includes a drill string. ### Claim 16 (depends on 15) The method of claim 15, wherein: the one or more operating characteristics of the drilling tool includes a curve of measured hookload of the drill string during pullout of the drill string from the lateral portion of the wellbore; and the determination of the pullout friction factor includes comparison of the curve of the measured hookload of the drilling tool during pullout of the drilling tool from the wellbore with curves of predicted hookload of the drilling tool during pullout of the drilling tool from the wellbore, separate ones of the curves of the predicted hookload generated based on separate values of the pullout friction factor, the curves of the predicted hookload including a first curve of the predicted hookload generated based on a first value of the pullout friction factor and a second curve of the predicted hookload generated based on a second value of the pullout friction factor, wherein a value of the pullout friction factor is determined to be between the first value and the second value based on the curve of the measured hookload falling between the first curve of the predicted hookload corresponding to the first value of the pullout friction factor and the second curve of the predicted hookload corresponding to the second value of the pullout friction factor. ### Claim 17 (depends on 16) The method of claim 16, wherein the pullout friction factor is determined further based on one or more physical properties of the drill string, the one or more physical properties of the drill string including one or more of shape, size, weight, and/or material of the drill string. ### Claim 18 (depends on 17) The method of claim 17, wherein the pullout friction factor is determined further based on one or more physical properties of the wellbore and one or more fluid properties inside the wellbore. ### Claim 19 (depends on 11) The method of claim 11, wherein the success of the casing runs is determined based on depth reached by the casing runs. ### Claim 20 (depends on 11) The method of claim 11, wherein the success of the casing runs is determined based on whether or not the casing runs experienced stuck casing or damaged casing before reaching a target position.