USE OF SURVIVAL MODELING METHODS WITH PIPELINE INSPECTION DATA FOR DETERMINING CAUSAL FACTORS FOR CORROSION UNDER INSULATION
First Claim
1. A computer-implemented method of modeling predicted CUI transition lifetimes in pipeline joints, comprising:
- for each pipeline joint in a plurality pipeline joints in one or more pipelines;
determining a first condition of the pipeline joint with respect to CUI at a first time;
determining a second condition of the pipeline joint with respect to CUI at a second time subsequent to the first time; and
determining a plurality of attributes associated with the pipeline joint; and
performing survival analysis modeling using the first condition, the second condition, and the plurality of attributes for the plurality of pipeline joints to derive one or more survival models reflecting one or more predicted lifetimes before a hypothetical input pipeline joint transitions from a first CUI condition to a second CUI condition.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods and systems for using survival modeling methods with pipeline inspection data to determine causal factors for corrosion under insulation comprise determining a first corrosion condition of a pipeline joint at a first time; determining a second corrosion condition of the pipeline joint at a second, subsequent time; determining joint attributes, pipeline attributes, and location attributes associated with the pipeline joint; and repeating the process for a plurality of pipeline joints in one or more pipelines. This information is fed into a multiple regression and survival analysis process that determines regression coefficients reflecting the estimated degrees to which various factors contribute to corrosion under insulation. The survival analysis also determines one or more survival models capable of predicting when a given pipeline joint is likely to transition from a first corrosion state to a different second corrosion state, given values for its various attributes.
-
Citations
36 Claims
-
1. A computer-implemented method of modeling predicted CUI transition lifetimes in pipeline joints, comprising:
-
for each pipeline joint in a plurality pipeline joints in one or more pipelines; determining a first condition of the pipeline joint with respect to CUI at a first time; determining a second condition of the pipeline joint with respect to CUI at a second time subsequent to the first time; and determining a plurality of attributes associated with the pipeline joint; and performing survival analysis modeling using the first condition, the second condition, and the plurality of attributes for the plurality of pipeline joints to derive one or more survival models reflecting one or more predicted lifetimes before a hypothetical input pipeline joint transitions from a first CUI condition to a second CUI condition. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10)
-
-
3. The method of claim 3, wherein one or more of the location attributes are derived from GIS data.
-
11. A system configured to model predicted CUI transition lifetimes in pipeline joints, the system comprising:
-
a processing system comprising one or more processors; and a memory system comprising one or more computer-readable media, wherein the computer-readable media have instructions stored thereon that, when executed by the processing system, cause the processing system to perform operations comprising; for each pipeline joint in a plurality pipeline joints in one or more pipelines; determining a first condition of the pipeline joint with respect to CUI at a first time; determining a second condition of the pipeline joint with respect to CUI at a second time subsequent to the first time; and determining a plurality of attributes associated with the pipeline joint; and performing survival analysis modeling using the first condition, the second condition, and the plurality of attributes for the plurality of pipeline joints to derive one or more survival models reflecting one or more predicted lifetimes before a hypothetical input pipeline joint transitions from a first CUI condition to a second CUI condition. - View Dependent Claims (12, 14, 15, 16, 17, 18, 19, 20)
-
-
13. The system of claim 13, wherein one or more of the location attributes are derived from GIS data.
-
21. A method of modeling predicted CUI transition intervals in pipeline joints, comprising:
-
for each pipeline joint in a plurality pipeline joints in one or more pipelines; inspecting the pipeline joint at a first time to determine a first condition of the pipeline joint with respect to CUI; inspecting the pipeline joint at a second time subsequent to the first time to determine a second condition of the pipeline joint with respect to CUI; and determining a plurality of attributes associated with the pipeline joint, the plurality of attributes comprising; one or more joint attributes selected from among the set of joint configuration attributes, joint orientation attributes, joint shape attributes, joint support attributes, and joint insulation attributes; one or more pipeline attributes selected from among the set of pipeline shape attributes, adjacent pipeline attributes, pipeline service attributes, pipeline wall thickness attributes, pipeline insulation attributes, pipeline length attributes, joint position attributes, pipeline material strength attributes, pipeline group configuration attributes, and pipeline production date attributes; and one or more location attributes selected from among the set of ground attributes, wind attributes, proximity to man-made phenomena attributes, and proximity to natural phenomena attributes; and generating a computer-implemented mathematical model based on inputs comprising the plurality of attributes, wherein the computer-implemented mathematical model comprises one or more survival functions capable of predicting one or more expected time intervals before a hypothetical input pipeline joint transitions from a first CUI condition to a second CUI condition based on attributes associated with the hypothetical input pipeline joint. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
-
-
29. A system configured to model predicted CUI transition intervals in pipeline joints, the system comprising:
-
a processing system comprising one or more processors; and a memory system comprising one or more computer-readable media, wherein the computer-readable media have instructions stored thereon that, when executed by the processing system, cause the processing system to perform operations comprising; for each pipeline joint in a plurality pipeline joints in one or more pipelines; determining a first condition of the pipeline joint with respect to CUI at a first time; determining a second condition of the pipeline joint with respect to CUI at a second time subsequent to the first time; and determining a plurality of attributes associated with the pipeline joint, the plurality of attributes comprising; one or more joint attributes selected from among the set of joint configuration attributes, joint orientation attributes, joint shape attributes, joint support attributes, and joint insulation attributes; one or more pipeline attributes selected from among the set of pipeline shape attributes, adjacent pipeline attributes, pipeline service attributes, pipeline wall thickness attributes, pipeline insulation attributes, pipeline length attributes, joint position attributes, pipeline material strength attributes, pipeline group configuration attributes, and pipeline production date attributes; and one or more location attributes selected from among the set of ground attributes, wind attributes, proximity to man-made phenomena attributes, and proximity to natural phenomena attributes; and generating a computer-implemented mathematical model based on inputs comprising the plurality of attributes, wherein the computer-implemented mathematical model comprises one or more survival functions capable of predicting one or more expected time intervals before a hypothetical input pipeline joint transitions from a first CUI condition to a second CUI condition based on attributes associated with the hypothetical input pipeline joint. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
-
Specification