Well logging winche over-depth protective system
A technology of protection system and winch, which is applied in the directions of measurement, wellbore/well components, earthwork drilling and production, etc. It can solve the problems that there is no mutual correlation and cannot realize the automatic braking protection of the winch, so as to improve the effect of safety guarantee
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[0037]The invention is an over-depth protection technology, which is widely used in the over-depth protection for well logging winches in the petroleum industry. When it is detected that the instant depth signal value of the well logging winch exceeds the set value and an alarm is issued, the well logging winch can realize well logging. Winch automatic brake protection. While retaining the manual brake function of the well logging drawworks, the present invention adds a reversing and selection circuit to the pneumatic brake circuit of the power system, and adds a processing circuit for alarm signals to the depth monitoring system on the original basis (see Figure 5 ).
[0038] Such as Figure 4 Shown is the schematic diagram of the pneumatic brake circuit of the logging winch in the present invention. In the pneumatic brake circuit of the power system, a reversing and selection circuit is added in series between the manual reversing valve 7 and the air compressor 6. The dir...
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