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Title:
OPERATION METHOD FOR LIFTING AND LOWERING DEVICE OF UNDERWATER PRESSURE TAPPING SYSTEM USED BY UNMANNED VESSEL
Document Type and Number:
WIPO Patent Application WO/2018/014398
Kind Code:
A1
Abstract:
An operation method for a lifting and lowering device of an underwater pressure tapping system used by an unmanned vessel, comprising the following steps: S1: using a pipeline (12) for positioning, identifying an area of interest, then using an underwater camera to perform a preliminary observation of the external appearance and an actual condition; S2: inspecting the pipeline (12) in the area of interest, and marking a pipeline section between cylindrical welds (16), and if a grinding tool or other similar mechanism is available, then operating the grinding tool or other similar mechanism by means of an unmanned vessel (18) to remove the marking afterwards; S3: positioning the cylindrical weld (16), then positioning to a location along the pipeline (12) near a circumferential weld (16) to install a non-pressurized tapping fitting on the cylindrical weld (16) or a nearby location; and S6: lowering a measuring or quantification tool from the water surface to the pipeline (12) at a specified area to inspect an external circumference and roundness of the pipeline (12) and to inspect, at the same time, an axial alignment and straightness of the pipeline (12). The invention improves the efficiency for placing and lifting the pipeline (12) and achieves greater accuracy for a placement location. The operation is also made intelligent to greatly reduce personnel and equipment costs.

Inventors:
YANG, Yue (YANG, ShunweiRoom 03, Fl.7, North of Baihui Bldg.,No. 3019 Sungang East Road, Luohu Dist, Shenzhen Guangdong 0, 518000, CN)
Application Number:
CN2016/095120
Publication Date:
January 25, 2018
Filing Date:
August 14, 2016
Export Citation:
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Assignee:
YANG, Yue (YANG, ShunweiRoom 03, Fl.7, North of Baihui Bldg.,No. 3019 Sungang East Road, Luohu Dist, Shenzhen Guangdong 0, 518000, CN)
International Classes:
B63B23/00
Foreign References:
US6290431B12001-09-18
CN202748028U2013-02-20
CN103556987A2014-02-05
CN1614441A2005-05-11
CN104787270A2015-07-22
CN102640715A2012-08-22
CN106112852A2016-11-16
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