Well logging winche over-depth protective system

A protection system and winch technology, applied in surveying, wellbore/well components, earth-moving drilling, etc., can solve the problems of lack of interconnection and the inability to realize automatic braking protection of the drawworks, and achieve the effect of improving safety assurance

Inactive Publication Date: 2009-04-29
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 logging winches in the petroleum industry. When it is detected that the immediate depth signal value of the logging winch exceeds the set value and an alarm is issued, the logging winch can realize logging. Winch automatic braking protection. While retaining the manual braking function of the logging drawworks, the present invention adds a reversing and selection circuit to the pneumatic braking circuit of the power system, and adds a processing circuit for the alarm signal to the depth monitoring system on the basis of the original (see Figure 5 ).

[0038] like Figure 4 As shown, it is a schematic diagram of the pneumatic brake circuit of the logging drawworks 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 dire...

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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, and after 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 the logging 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 winch. Background technique [0002] At present, the well-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 computer. [0003] like figure 1 Shown is the hydraulic principle diagram of the hydraulic system of the logging winch in the prior art. The volume speed control circuit in the hydraulic system is composed of a bidirectional variable pump 1 and a bidirectional variable motor 3. The output speed of the bidirectional variable motor 3 is changed by the flow change caused by the change of the displacement of the bidirectional variable pump 1, thereby realizing the speed adjustment of the logging drawworks. . The hydraulic pump 2 pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B49/00B66D1/60B66D1/54B66D5/20B66D5/02E21B47/04
Inventor 王小春马梓晋
Owner CHINA NAT OFFSHORE OIL CORP
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