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US 10,329,855 B2Granted
Control line assembly and fabrication technique
AssigneeSchlumberger Technology Corporation
InventorsDominic Joseph Brady, Gary Oddie
Life of this patent
Estimating the term…
Abstract
A control line assembly and technique for fabricating the control line assembly are disclosed. The assembly includes drawn tubular segments through which a gas is flowed to purge contaminants. The outflow of contaminants due to the gas flow is monitored and the gas flow can be controlled and terminated when a sufficient quantity of contaminants has been extracted. The gas flow can be combined with a heat treatment cycle to further extract contaminants. The heat treatment cycle can include multiple heating stages that can be controlled based on the monitoring of the exiting contaminants.
Claims20
A control line assembly, comprising:
- a plurality of drawn tubular segments, each drawn tubular segment having a passageway extending therethrough that is defined by an inner wall, wherein contamination is removed from each drawn tubular segment by flowing a gas through the passageway, monitoring the gas flow downstream to determine the amount of contaminants exiting the passageway, modulating the gas flow to control pressure within the passageway, testing each drawn tubular segment to confirm absence of contamination in the passageway, and terminating the gas flow when the amount of contaminants exiting the passageway is determined to be below a selected threshold, and
- wherein the plurality of drawn tubular segments are joined so that the respective passageways form a continuous passageway that extends through the entire length of the joined segments.
A method of fabricating a control line, comprising:
- drawing a plurality of tubular segments, each segment having a passageway therethrough;
- flowing a gas through the passageway to purge or react with contaminants in the passageway during a process cycle;
- monitoring contaminant effluent in the outflow of gas exiting the passageway;
- and
- controlling the gas flow and a temperature of the process cycle based on monitoring the contaminant effluent;
- applying a plurality of heating stages to a tubular segment during the process cycle;
- monitoring the contaminant effluent exiting the tubular segment during each of the heating stages;
- terminating a heating stage based on a rate of change of the amount of contaminants in the contaminant effluent;
- and
- controlling pressure within the passageway independently of a pressure applied to the exterior of the tubular segment.
7 more elements
A method of fabricating a control line, comprising:
- drawing a plurality of tubular segments, each segment having a passageway therethrough;
- flowing a gas through the passageway to purge or react with contaminants in the passageway during a process cycle;
- monitoring contaminant effluent in the outflow of gas exiting the passageway;
- and
- controlling the gas flow and a temperature of the process cycle based on monitoring the contaminant effluent;
- applying a plurality of heating stages to a tubular segment during the process cycle, wherein the heating stages are performed at different temperatures;
- monitoring the contaminant effluent exiting the tubular segment during each of the heating stages;
- and
- terminating a heating stage based on a rate of change of the amount of contaminants in the contaminant effluent, wherein the time duration, temperature and pressure of the heating stages are based at least on the thermal vaporization and degradation properties of the contaminants in the passageway.
6 more elements
A method of fabricating a control line, comprising:
- drawing a plurality of tubular segments, each segment having a passageway therethrough;
- flowing a gas through the passageway to purge or react with contaminants in the passageway during a process cycle;
- monitoring contaminant effluent in the outflow of gas exiting the passageway;
- and
- controlling the gas flow and a temperature of the process cycle based on monitoring the contaminant effluent;
- modulating the gas flow to control pressure within the passageway;
- and
- testing each tubular section to confirm absence of contamination in the passageway;
- and joining the tubular section with another tubular section to form a continuous passageway therethrough if the absence of contamination has been confirmed.
6 more elements
A method for removing contamination from a tubular structure, comprising:
- flowing a gas through a tubular structure having contaminants present within an inner bore;
- monitoring the gas flow downstream to determine amount of contaminants exiting the inner bore of the tubular structure via the gas flow;
- and
- controlling the gas flow through the tubular structure based on the amount of contaminants exiting the inner bore, wherein the gas includes a reactive component, and wherein monitoring includes monitoring reaction products of the contaminants with the gas that exit the inner bore, and wherein the gas flow further is controlled based on the monitored reaction products.
1 more element
A method for removing contamination from a tubular structure, comprising:
- flowing a gas through a tubular structure having contaminants present within an inner bore;
- monitoring the gas flow downstream to determine amount of contaminants exiting the inner bore of the tubular structure via the gas flow;
- controlling the gas flow through the tubular structure based on the amount of contaminants exiting the inner bore;
- and
- applying a heat treatment cycle to the tubular structure while flowing the gas and monitoring the gas flow, and controlling the heat treatment cycle based on the monitoring, wherein monitoring the gas flow further comprises detecting thermal degradation products of the contamination.
2 more elements
A method for removing contamination from a tubular structure, comprising:
- flowing a gas through a tubular structure having contaminants present within an inner bore;
- monitoring the gas flow downstream to determine amount of contaminants exiting the inner bore of the tubular structure via the gas flow;
- controlling the gas flow through the tubular structure based on the amount of contaminants exiting the inner bore;
- applying a heat treatment cycle to the tubular structure while flowing the gas and monitoring the gas flow, and controlling the heat treatment cycle based on the monitoring;
- testing the tubular structure to confirm absence of contaminants in the inner bore;
- joining the tubular structure with another tubular structure to form a continuous passageway therethrough if the absence of contamination has been confirmed;
- deploying the joined tubular structures in a wellbore that penetrates a hydrocarbon-bearing earth formation;
- and
- fluid pumping an optical fiber to deploy the optical fiber within the continuous passageway formed by the joined tubular structures.
6 more elements
Dependencies are inferred from the claim text.