Well control system and method for safety interlocking of other well drilling systems
A system safety and drilling technology, which is applied in the field of safety interlock, can solve problems such as operational errors, large economic losses, production accidents, etc., and achieve the effect of avoiding accidents and improving safety and reliability
Active Publication Date: 2017-01-11
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
Now it mainly relies on drilling rig operators to observe, analyze and deal with the logical relationship between them, causing operational errors from time to time, often leading to production accidents and large economic losses
Method used
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Embodiment Construction
[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0017] The present invention provides a safety interlocking method between a well control system and other drilling systems, the specific steps of which are as follows:
[0018] 1) A PLC controller is installed in the well control system, and the PLC controller monitors the working status of the rotating system, lifting system and circulation system;
[0019] 2) When the offshore drilling rig is in normal operation, the well control system, rotation system, lifting system and circulation system work independently;
[0020] 3) When encountering an emergency and the blowout preventer in the well control system needs to be closed, the PLC controller judges whether the rotating system, hoisting system and circulation system are all in a stopped state;
[0021] 4) If the rotating system, the hoisting system and the circulating system are all in a stopped ...
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The invention relates to a well control system and a method for safety interlocking of other well drilling systems. The method comprises the following steps that 1, a PLC is arranged in the well control system and monitors state signals of a rotating system, a lifting system and a circulatory system; 2, during normal operation, the systems work independently; 3, when a blowout preventer is needed to be closed in emergency circumstances, the PLC judges whether the systems are in a stop state or not; 4, if the systems are in the stop state, the PLC controls the systems to send locking instructions, and the step 5 is executed; if not, the PLC sends stop instructions and locking instructions to the systems, and the step 6 is executed; 5, the systems perform locking and return information, the step 7 is executed; 6, the systems close and lock corresponding devices and return information; 7, the well control system judges whether the systems perform locking or not, if yes, a next step is executed, if not, the step 4 is repeated; 8, the well control system closes the blowout preventer.
Description
technical field [0001] The invention relates to a safety interlock method, in particular to a safety interlock method between a well control system used in the oil drilling field and other drilling systems. Background technique [0002] At present, the well control system, hoisting system, rotating system and circulation system of oil drilling rigs on domestic offshore fixed platforms are all controlled by PLC, and there is no communication connection between them, and there is no coordinated logic interlocking in the control system The parts of the relationship cannot realize the logical interlocking relationship between them. For example, if figure 1 As shown, the steps for closing the blowout preventer in the existing well control system are as follows: 1) The offshore drilling rig device includes a well control system, a hoisting system, a rotating system and a circulation system; 2) During normal operation, each system operates independently of each other; 3 ) in case...
Claims
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IPC IPC(8): E21B44/00E21B33/064F04B49/06B66D1/48
CPCB66D1/485E21B33/064E21B44/00F04B49/06
Inventor 杨向前刘书杰郭华何玉成周建良周超何英明李建民
Owner CHINA NAT OFFSHORE OIL CORP