Quick coring drilling system without marine riser and method based on circulating drilling fluid

A technology for circulating drilling fluid and riser, which is used in drilling equipment, undisturbed core extraction devices, and driving devices for drilling in wellbore. The effect of core drilling and the effect of solving core blockage

Pending Publication Date: 2018-09-18
GUANGZHOU MARINE GEOLOGICAL SURVEY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a riser-free rapid coring drilling system and method based on circulating drilling fluid, which can solve the problems of complex operation and complicated emergency release procedures in the drilling process

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  • Quick coring drilling system without marine riser and method based on circulating drilling fluid

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Embodiment Construction

[0018] Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

[0019] Such as figure 1 As shown, a riser-free rapid coring drilling system based on circulating drilling fluid includes a mud circulation system and a coring drilling system; the core drilling system includes a drill pipe 17 and a The salvage spear head 11, the driving device 12, the hydraulic down-the-hole hammer 13, the core pipe 14 and the drill bit 15 are connected in sequence; the mud circulation system includes the return cone 10, the recovery pump 6, the umbilical cable winch 4, and the umbilical cable 5 , solid control equipment 3, mud tank 8, mud pump 9 and delivery pipeline group; Described delivery pipeline group comprises the first delivery pipeline 2, the second delivery pipeline 7 and the 3rd delivery pipeline 21; The umbilical winch 4 is connected to the recovery pump 6 located in the seabed through the umbilical cable 5, the umbilical ...

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Abstract

The invention relates to a quick coring drilling system without a marine riser and method based on circulating drilling fluid. The quick coring drilling system comprises a mud circulation system and acoring drilling system body, wherein the coring drilling system body comprises a drill pipe, a spearhead, a driving device, a hydraulic down-hole hammer, a core pipe and a drill bit which are sequentially connected from top to bottom inside the drill pipe; the mud circulation system comprises a return cone, a recovery pump, a mud tank, a mud pump and a conveying pipeline group; the conveying pipeline group comprises a first conveying pipeline, a second conveying pipeline and a third conveying pipeline; and the mud tank, mud pump, the drill pipe, the return cone and the conveying pipeline group are in communication with each other to form a mud circulation channel. The quick coring drilling system does not use the marine riser, the time for lowering a pipe column is reduced, the emergencyrelease speed is accelerated, the connection can be quickly performed through the return cone, time and cost are saved, and the risk of wellhead instability is reduced.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a riser-free rapid coring drilling system and method based on circulating drilling fluid. Background technique [0002] The water depth of oil and gas exploration and oceanic scientific drilling is getting deeper and deeper. Deepwater drilling and ultra-deepwater drilling exceed several kilometers. In conventional deepwater drilling, the riser method is usually used, and the riser method has the following disadvantages: 1) This The riser drilling system is complex in matching and operation, and the load acts on the soft formation at the wellhead, which affects the stability of the wellhead. Moreover, when the mud (also known as drilling fluid) is kept in closed circuit circulation in the conventional riser, the pressure drop of the mud circulation increases. There are great restrictions on the construction of narrow space density windows, very strict requirements on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00E21B4/14
CPCE21B4/14E21B25/00
Inventor 叶建良秦绪文邱海峻张伟谢文卫王偲
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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