8 results about "Well integrity" patented technology

The invention provides a system and computer program for identifying the depth of leaks in well casing strings after receiving temperature-depth data from a thermally conditioned well. Upon receiving the data, the system calculates moving average temperature gradients over a specified length of the casing. It then computes the mean and standard deviation of these gradients to determine a lower control limit (LCL) using a predefined formula. The system identifies leak depths by locating gradients below the LCL. The computer program generates control charts, visual alerts, and detailed reports to facilitate leak detection, offering a streamlined and effective approach to well integrity assessment.

A remotely operable Wellbore Integrity System for large scale monitoring of annular pressure on production wells. The system enhances the integrity of annular casing strings associated with mineral wellbores. The system can be autonomously deployed and has programmable pressure relief valves enabling remote adjustment of the casing pressure.

The invention belongs to the field of wellbore integrity risk assessment, and discloses a high-pressure gas well integrity risk dynamic assessment method and related device.The method comprises the steps that B, C and D annulus pressure control ranges of a high-pressure gas well are obtained; the method comprises the following steps of: checking performance parameters of each component of the annulus A of the high-pressure gas well to obtain a maximum allowable belt pressure value and a minimum reserved working pressure value of each component of the annulus A; according to the maximum allowable belt pressure value and the minimum reserved working pressure value of each component of the A annulus, a pressure control range chart of the A annulus is obtained; and utilizing the A annular pressure control range chart and the B, C and D annular pressure control ranges, evaluating the well barrier state by adopting list evaluation, and respectively evaluating the completeness of the stratum, the shaft and the wellhead barrier component. The method is beneficial for improving the safety and efficiency of gas well production and reducing the management cost, and has important practical significance and application value.

There is disclosed a system for monitoring the integrity of a barrier in a well, the system comprising: - a wellbore termination means, such as a wellhead or a blowout preventer, terminating the well at an upper portion of a wellbore; - a first barrier provided in the well below the wellbore termination means; - a container including, or having included, a fluid to be released below the first barrier in the well so as to establish a pressure gradient across the first barrier; - a pressure sensor connected to the wellbore termination means, the pressure sensor being adapted to sense a change in well pressure There is also disclosed a well including the system and a method of monitoring the pressure integrity of such a well.

Systems and methods for well integrity evaluation are provided. A method for managing well completion includes: obtaining measurement data for a well completion in a geological formation where a wellbore of a well is disposed, pre-processing the measurement data to obtain raw dispersion estimates of frequency slowness content of acoustic energy corresponding to at least one borehole mode, obtaining a dispersion image including dispersion image data using the raw dispersion estimates, based on an accumulation of raw estimated dispersion estimates of frequency-slowness content of borehole acoustic modes, generating a template image using a template dispersion curve corresponding to at least one vicinity of the template dispersion curve, extracting a dispersion quality image of a borehole mode, extracting a dispersion quality metric of the borehole mode, and determining a confidence value for at least one estimated well property for the well based on the dispersion quality, using the template dispersion curve.

Systems and methods for well integrity evaluation are provided. A method for managing well completion includes: obtaining measurement data for a well completion in a geological formation where a wellbore of a well is disposed, pre-processing the measurement data to obtain raw dispersion estimates of frequency slowness content of acoustic energy corresponding to at least one borehole mode, obtaining a dispersion image including dispersion image data using the raw dispersion estimates, based on an accumulation of raw estimated dispersion estimates of frequency-slowness content of borehole acoustic modes, generating a template image using a template dispersion curve corresponding to at least one vicinity of the template dispersion curve, extracting a dispersion quality image of a borehole mode, extracting a dispersion quality metric of the borehole mode, and determining a confidence value for at least one estimated well property for the well based on the dispersion quality, using the template dispersion curve.

A method for predicting a CO2 storage risk assessment includes determining a set of well integrity rules and determining a classification process based on the set of well integrity risks. Data relevant to the set of well integrity rules is extracted from data for a well located in a subsurface formation. The extracted data is provided to the classification process. A prediction for a subsurface CO2 storage risk assessment is computed for the well. In a preferred embodiment, subsurface CO2 storage risk assessment for two or more wells in the subsurface formation are used to compute a prediction of a formation CO2 storage risk assessment.

A liner top testing tool to be fitted on a drilling equipment configured to perform drilling for formation of a well and cleaning a casing inside the well is disclosed. The tool comprises a landing sub coated with crushed carbide, configured to land on liner top of the casing inside the well, a junk breaker configured to break casing drill cement and junk into small pieces, an element packer configured to isolate mud of the casing drill cement and the junk inside the casing and test integrity of the well, a scraper configured to scrap the casing and clean ahead of the element packer for improved isolation and good test, a stabilizer sleeve having bearing ball configured to stabilize the tool and provide high RPM to the stabilizer sleeve, and a mandril disposed in between the landing sub, the junk breaker, the element packer scraper, and the stabilizer sleeve.