Control system and method for protecting inside blow-out preventer of oil drilling rig top drive

Abstract

The invention relates to a control system and method for protecting an inside blow-out preventer of an oil drilling rig top drive. The control system comprises a top drive electronic control system and a VFD electronic control system; one end of a top drive inside blow-out preventer (IBOP) switch is connected with a +24V power supply, and the other end of the switch is connected with an input module of a top drive operating table PLC; the operating table PLC is connected with a top drive electronic control main PLC through a Profibus communication line; the output point of an I / O output moduleof the top drive electronic control main PLC is connected with the end A1 of a -K50 relay, the other end A2 of the -K50 relay is connected with the position of a power supply M, two ends of a -K50 relay normally open point are connected with two parallel lines, the tail end of one line is connected with an I / O input module of a VFD electronic control integrated cabinet main PLC, the tail end of the other line is connected with the +24 power supply of the VFD electronic control system, and then the VFD main PLC is separately and electrically connected with a mud pump converter and a driller station PLC through the Profibus communication line. The top drive inside blow-out preventer cannot be damaged even if a driller mistakenly operates the IBOP, other safety hazards cannot be caused, so that the top drive inside blow-out preventer is effectively protected.

Description

technical field [0001] The invention belongs to the technical field of oil drilling, and relates to an internal blowout preventer in the top drive system of an oil drilling rig, in particular to a control system and method for protecting the top drive internal blowout preventer of an oil drilling rig. Background technique [0002] At present, compared with the rotary table, the top drive of oil drilling rig can significantly improve the ability and efficiency of drilling operations, and has become the standard configuration of drilling rigs in the oil drilling industry. Drill pipes must be connected and unloaded frequently during the drilling process. At this time, the top drive internal blowout preventer (IBOP) and the mud pump will be turned on or off. The normal operation sequence is: firstly, the pump of the mud pump should be reduced to zero, and then the top drive internal blowout preventer (IBOP) should be closed, and then the drilling tools can be removed to lift the...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of damage to the top drive internal blowout preventer caused by the above-mentioned misoperation in the prior art, the present invention provides a control system for protecting the top drive internal blowout preventer of an oil drilling rig

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