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Deepwater drilling riser inclination measuring device and measuring method

A technology of riser casing and measuring device, applied in the field of drilling, can solve the problems of time-consuming and laborious, inability to open holes, broken casing, etc., and achieve the effect of ensuring safety and convenient operation.

Pending Publication Date: 2021-01-22
POWERCHINA ZHONGNAN ENG +1
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AI Technical Summary

Problems solved by technology

When the underwater terrain is uneven, or when holes need to be drilled on slopes, it is very difficult to ensure that the water-resisting casing enters the formation vertically
[0003] During the running of the deepwater casing, due to the image of the water flow and the slope of the terrain, and the typical long and thin rod of the water-resisting casing, the self-stability is poor, and there is no constraint around it. The casing is very slow to keep the position of the plumb from the predetermined hole position into the formation
When the sleeve is seriously bent, it will lead to failure to drill holes, or even break the sleeve
[0004] The traditional borehole inclinometer can only lower the measuring instrument from the casing. Before lowering, all the drilling tools in the hole (casing) must be lifted out of the hole and then put into the instrument. Dynamic Monitoring

Method used

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  • Deepwater drilling riser inclination measuring device and measuring method
  • Deepwater drilling riser inclination measuring device and measuring method
  • Deepwater drilling riser inclination measuring device and measuring method

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Embodiment Construction

[0039] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. For the convenience of description, if the words "up", "down", "left" and "right" appear in the following, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

[0040] Such as figure 1 , 2 As shown, a deep water drilling riser inclination measuring device provided in this embodiment includes a first plate 1, a second plate 2, an adjuster 3, a ring cavity 4, an electromagnet 5, a guide cover 6, a drag reducing Component 7 and sensor 8.

[0041] Both the first plate 1 and the second plate 2 are arc-shaped structures, that is, the inner curvature of the first plate 1 and the second plate 2 coincides with the oute...

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Abstract

The invention provides a deepwater drilling riser inclination measuring device and measuring method. The deepwater drilling riser inclination measuring device comprises a first plate and a second plate arranged opposite to the first plate, wherein the first plate and the second plate are connected through an adjuster to form a ring-shaped cavity used for being arranged outside a riser in a sleeving mode, and the size of the ring-shaped cavity is adjusted through the adjuster; and a sensor capable of measuring the inclination of the riser is arranged on the first plate. Compared with the priorart, the measuring device dynamically monitors the inclination state of the riser at any time and corrects the inclination state of the riser in time in a hole formed in an uneven or slope part of anunderwater terrain, can ensure the safety of the deepwater drilling riser, and solves the technical problem that other measuring instruments cannot measure the inclination on the outer side of the riser.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a device for measuring the inclination of a deepwater drilling riser casing and a measuring method thereof. Background technique [0002] The fixing and positioning of the water-resisting casing for drilling in water is very critical, and it is the first condition to ensure normal drilling. When the underwater terrain is uneven, or when holes need to be drilled on slopes, it is very difficult to ensure that the water-resisting casing enters the formation vertically. [0003] During the running of the deepwater casing, due to the image of the water flow and the slope of the terrain, and the typical long and thin rod of the water-resisting casing, the self-stability is poor, and there is no constraint around it. The casing is very slow to keep the position of the plumb from the predetermined hole position into the strata. When the sleeve is seriously bent, it will result in fail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/02G01C9/00
CPCE21B47/02G01C9/00
Inventor 刘良平胡晨王少华李永丰胡郁乐
Owner POWERCHINA ZHONGNAN ENG
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