A Length Measuring System for the Wellhead String of a Semi-submersible Drilling Platform
A drilling platform and semi-submersible technology, applied in the field of oil and gas drilling, can solve problems such as errors and different measurement results, and achieve the effects of improving measurement accuracy, reducing labor intensity and improving measurement efficiency
Active Publication Date: 2020-08-28
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
However, measuring the length with the existing method is affected by factors such as personnel operation. Different people measure, or even the same person measures when the tension of the tidal range rope, the angle of tension of the tidal range rope, and the ups and downs of the platform are often different. Not the same, there is a large error
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[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0016] See attached figure 1 to attach image 3 As shown, the length measurement system of a wellhead pipe string of a semi-submersible drilling platform described in this embodiment includes a measurement system A and a tidal range rope tensioning system B, and the measurement system A corresponds to the tidal range rope tensioning system B setting, wherein the measurement system A includes a measuring device 1 and a pipe string 2, and the pipe string 2 is vertically arranged with the drill floor rotary table 13; the measuring device 1 is composed of a buckle plate 101, a right-angled Composed of a laser emitting device 104, the pinch plate 101 is an arc-shaped plate made of plastic, resin, etc. that matches the outer surface of the pipe string 2, and the pinch plate 101 can be movably fastened to the pipe string 2 through the inner arc surface Abo...
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The invention discloses a length measuring system of a wellhead tubular column of a semi-submersible drilling platform. The length measuring system of the wellhead tubular column of the semi-submersible drilling platform comprises a measuring system body and a tidal range rope stretching system, wherein the measuring system body comprises a measurer and the tubular column, and the tubular column is perpendicular to a drill floor rotary table. The measurer is composed of a buckle plate, a right-angle set square, a fixed block and a laser launching device, the buckle plate is a circular arc-shaped plate which is consistent with the outer surface of the tubular column, a long side and a short side are separately arranged at the two right-angle sides, adjacent to a right angle, on the right-angle set square, the short side is vertically fixed to the middle position of the arc back surface of the buckle plate, a hypotenuse opposite to the right angle is a side facing downwards, and the laser launching device is fixed to the long side of the right-angle set square through the fixed block. The tidal range rope stretching system is arranged on the side corresponding to the laser launchingdevice. According to the length measuring system of the wellhead tubular column of the semi-submersible drilling platform, measuring errors caused by factors that a tidal range rope is not straightened or angles are different in the operation process are avoided, the measuring accuracy and efficiency are improved, and labor intensity is reduced.
Description
technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a length measuring system for a wellhead pipe string of a semi-submersible drilling platform. Background technique [0002] At present, for drilling, logging, completion, workover, testing and other operations in the offshore oil and gas drilling industry, operations such as calculating the well depth, the length of drilling tools (including drill pipe, casing, and tubing) entering the well, and adjusting the length of the tubing string Both use the turntable surface of the drill floor as the depth datum. The three legs of the offshore jack-up drilling platform are inserted into the seabed. The surface of the turntable is affected by the tide and wind and waves and moves up and down relative to the formation. Therefore, the semi-submersible platform usually pulls a tidal range rope, and one end of the rope is fixed on the riser (the riser does not move relative to th...
Claims
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IPC IPC(8): G01C15/00
CPCG01C15/00G01C15/004
Inventor 曾春珉郭永宾孟文波韦龙贵王巍王小勇孙龙波靳书凯邓华根陈才肖谭童岳鹿传世张崇刘贤玉
Owner CHINA NAT OFFSHORE OIL CORP