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

Inactive Publication Date: 2012-07-04
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the prior art, there is no correlation between the power system of the logging winch and the depth monitoring system, and the automatic braking protection of the winch cannot be realized when the depth is too high

Method used

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  • Well logging winche over-depth protective system
  • Well logging winche over-depth protective system
  • Well logging winche over-depth protective system

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Embodiment Construction

[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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PUM

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Abstract

The invention discloses a logging winch super depth protection system, which comprises a pneumatic brake loop and a control circuit of power system. A commutation and selection loop is arranged between the manual directional valve and the air compressor of the pneumatic brake loop, and the control circuit is provided with an alarm signal processing circuit; when the depth value of the logging winch exceeds a set value, the alarm signal processing circuit receives the alarm signal in the control circuit to generate alarm control signal to control the commutation and selection loop to work, andafter the motion of the commutation and selection loop, the pneumatic brake loop can be started to brake. The invention establishes the association of the power system and depth monitor system of thelogging winch, and realizes the protection function of automatic brake for the logging winch with super depth.

Description

technical field [0001] The invention relates to an over-depth protection technology, in particular to an over-depth protection system for a logging drawworks. Background technique [0002] At present, the known logging winch is composed of a power system and a depth monitoring system, wherein the power system is composed of a hydraulic system and a pneumatic brake circuit, and the depth monitoring system is composed of an encoder and an industrial control microcomputer. [0003] Such as figure 1 Shown is the hydraulic schematic diagram of the hydraulic system of the logging winch in the prior art. The volume speed regulating circuit in the hydraulic system is composed of a two-way variable pump 1 and a two-way variable motor 3. The output speed of the two-way variable motor 3 is changed by the flow change caused by the change of the displacement of the two-way variable pump 1, so as to realize the speed regulation of the logging winch . The hydraulic pump 2 provides the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/04B66D1/60B66D1/54B66D5/20B66D5/02
Inventor 王小春马梓晋
Owner CHINA NAT OFFSHORE OIL CORP
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