# US 2018/0023385 A1 · Determining Directional Data for Device within Wellbore using Contact Points > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023385 A1 - Document ID: US20180023385A1 - Status: Published application - Kind: A1 - Application number: 15/721,847 - Filed: 2017-09-30 - Published: 2018-01-25 - Earliest claimed: 2014-02-21 - Assignees: Gyrodata, Incorporated - Applicants: Gyrodata, Incorporated - Inventors: Jon Bang; Onyemelem Jegbefume; Adrián Guillermo Ledroz; John Lionel Weston - Web page: https://patentgrep.com/patent/US20180023385A1 ## CPC - E21B 47/022: of the borehole, e.g. using geomagnetism - E21B 47/024: of devices in the borehole (determining slope or direction of the borehole E21B47/022) - G01V 1/40: specially adapted for well-logging - G01V 3/18: specially adapted for well-logging - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02) ## Abstract A system and method for providing information regarding the tortuosity of a wellbore path is provided. The method includes receiving data from a plurality of survey stations of a wellbore survey. The method further includes determining a plurality of tortuosity parameter values for the wellbore path within a corresponding plurality of analysis windows, wherein each analysis window has at least one tortuosity parameter value. ## Claims ### Claim 1 A method, comprising: (a) receiving survey data acquired at a plurality of survey stations during a survey of a wellbore configured to have a tubular structure disposed therein, wherein the tubular structure is configured to have an elongate structure disposed therein; (b) determining a plurality of contact points for the elongate structure disposed within the tubular structure based on the survey data; (c) determining first directional data for the elongate structure at the plurality of contact points based on the survey data; and (d) determining second directional data for an estimated trajectory of the elongate structure within the tubular structure based on the first directional data. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the plurality of contact points comprises: determining one or more reference lines for the tubular structure based on the survey data; determining one or more displacements of a central path of the tubular structure from the one or more reference lines; and determining the plurality of contact points based on the one or more displacements. ### Claim 3 (depends on 1) The method of claim 1, wherein the survey data comprises measurements used to determine a measured depth value, an inclination value, and an azimuth value for each of the plurality of survey stations. ### Claim 4 (depends on 1) The method of claim 1, wherein the tubular structure comprises a production tubing disposed in the wellbore, and wherein the elongate structure comprises a rod disposed in the production tubing. ### Claim 5 (depends on 1) The method of claim 1, wherein determining the first directional data comprises: determining an inclination value and azimuth value for the elongate structure at a first contact point based on a survey station having a same measured depth value as the first contact point; determining an inclination value and an azimuth value for a second contact point using one or more interpolation techniques based on measured depth values, inclination values, and azimuth values of the plurality of survey stations; or combinations thereof. ### Claim 6 (depends on 1) The method of claim 1, wherein the second directional data comprise inclination values and azimuth values for predetermined intervals along the estimated trajectory. ### Claim 7 (depends on 6) The method of claim 6, wherein determining the second directional data for the estimated trajectory comprises determining the inclination values and azimuth values for predetermined intervals along the estimated trajectory using one or more interpolation techniques based on the first directional data. ### Claim 8 (depends on 6) The method of claim 6, further comprising performing one or more smoothing techniques on the second directional data, one or more filtering techniques on the second directional data, or combinations thereof. ### Claim 9 (depends on 1) The method of claim 1, further comprising determining one or more side forces acting on the elongated structure based on the second directional data. ### Claim 10 (depends on 9) The method of claim 9, further comprising providing recommendations for, generating recommendations for, or determining one or more locations for placement of one or more rod guides based on the determined one or more side forces. ### Claim 11 (depends on 10) The method of claim 10, wherein providing recommendations for, generating recommendations for, or determining the one or more locations for placement of the one or more rod guides comprises determining the one or more locations based on whether the one or more side forces exceeds a predetermined threshold level. ### Claim 12 (depends on 11) The method of claim 11, further comprising iteratively performing one or more steps (a)-(d) based on the determined one or more locations for placement of the one or more rod guides, one or more outer diameters of the one or more rod guides, or combinations thereof. ### Claim 13 A method, comprising: receiving survey data acquired at a plurality of survey stations during a survey of a wellbore configured to have a production tubing disposed therein, wherein production tubing is configured to have a rod disposed therein; determining a plurality of contact points for the rod disposed within the production tubing based on the survey data; determining first directional data for the rod at the plurality of contact points based on the survey data; and determining second directional data for an estimated trajectory of the rod within the production tubing based on the first directional data, wherein the second directional data comprise inclination values and azimuth values for predetermined intervals along the estimated trajectory. ### Claim 14 (depends on 13) The method of claim 13, wherein determining the plurality of contact points comprises: determining one or more reference lines for the production tubing based on the survey data; determining one or more displacements of a central path of the production tubing from the one or more reference lines; and determining the plurality of contact points based on the one or more displacements. ### Claim 15 (depends on 13) The method of claim 13, wherein determining the first directional data comprises: determining an inclination value and azimuth value for the rod at a first contact point based on a survey station having a same measured depth value as the first contact point; determining an inclination value and an azimuth value for a second contact point using one or more interpolation techniques based on measured depth values, inclination values, and azimuth values of the plurality of survey stations; or combinations thereof. ### Claim 16 (depends on 13) The method of claim 13, wherein determining the second directional data for the estimated trajectory comprises determining the inclination values and azimuth values for predetermined intervals along the estimated trajectory using one or more interpolation techniques based on the first directional data. ### Claim 17 (depends on 13) The method of claim 13, further comprising: determining one or more side forces acting on the rod based on the second directional data; and determining one or more locations for placement of one or more rod guides based on whether the determined one or more side forces exceeds a predetermined threshold level. ### Claim 18 A non-transitory computer-readable medium having stored thereon a plurality of computer-executable instructions which, when executed by a computer, cause the computer to: receive survey data acquired at a plurality of survey stations during a survey of a wellbore configured to have a tubular structure disposed therein, wherein the tubular structure is configured to have an elongate structure disposed therein; determine a plurality of contact points for the elongate structure disposed within the tubular structure based on the survey data; determine first directional data for the elongate structure at the plurality of contact points based on the survey data; and determine second directional data for an estimated trajectory of the elongate structure within the tubular structure based on the first directional data. ### Claim 19 (depends on 18) The non-transitory computer-readable medium of claim 18, wherein the second directional data comprise inclination values and azimuth values for predetermined intervals along the estimated trajectory. ### Claim 20 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the computer-executable instructions which, when executed by a computer, cause the computer to determine the second directional data for the estimated trajectory further comprise computer-executable instructions which, when executed by the computer, cause the computer to determine the inclination values and azimuth values for predetermined intervals along the estimated trajectory using one or more interpolation techniques based on the first directional data.