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US 2015/0308237 A1Published application
System and method for managed pressure drilling
AssigneesSinopec Tech Houston, China Petroleum & Chemical Corporation
InventorsSheng ZHAN, Jinhai ZHAO, Herong ZHENG, Weiping XU
Life of this patent
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Abstract
The present disclosure provides a managed pressure drilling (MPD) system and methods for assessing and optimizing. For example, reliability models such as Failure Modes and Effects Analysis (FMEA), Fault Tree Analysis (FTA), Ishikawa diagram, Pareto chart, Reliability Block Diagram (RBD) are used in assessing the system reliability. The MPD drilling system is suitable for offshore drilling operations.
Claims18
A method for a managed pressure drilling (MPD) operation, comprising:
- designing a MPD drilling system comprising a rotating control device (RCD), a drilling string non-return valve (NRV), and a choke manifold;
- providing a first reliability model for a probability of a failure mode of the MPD operation;
- assessing the probability of the failure mode based on the first reliability model;
- and
- devising a first well control scheme to detect the failure mode assessed based on the first reliability model,
- wherein the first reliability model is chosen from a Failure Modes and Effects Analysis (FMEA), Fault Tree Analysis (FTA), Ishikawa diagram, Pareto Chart, Reliability Block Diagram (RBD), and combinations thereof.
3 more elements
A managed pressure drilling system, comprising:
- a rotating control device (RCD), a drilling string non-return valve (NRV), a choke manifold, and a plurality of downhole drilling tools, wherein
- a reliability of the system is assessed using one or more reliability models selected from a group consisting of Failure Modes and Effects Analysis (FMEA), Fault Tree Analysis (FTA), Ishikawa diagram, Pareto chart, Reliability Block Diagram (RBD), and combinations thereof.
Dependencies are inferred from the claim text.