Drilling sleeve device suitable for offshore exploration ship and construction method thereof

Abstract

The invention relates to a drilling sleeve device suitable for an offshore exploration ship and a construction method thereof. The drilling sleeve device is simple in structure, convenient to implement and low in cost. According to the technical scheme, the drilling sleeve device is provided with a sleeve main body and a driving mechanism fixed to the offshore exploration ship; the sleeve main body comprises an adjusting mechanism, a sleeve set and a sleeve head which are sequentially connected from top to bottom; the adjusting mechanism is provided with an inner sleeve and an outer sleeve which is coaxially arranged on the inner sleeve in a sleeving mode; the upper end of the inner sleeve is connected with a connecting piece shaped like the Chinese character 'mi'; the lower end of the outer sleeve is coaxially connected with the upper end of the sleeve set; two full-length first racks which are symmetrical with respect to the axis of the outer sleeve are arranged on the outer side face of the outer sleeve, and two full-length second racks which are symmetrical with respect to the axis of the sleeve set are arranged on the outer side face of the sleeve set; two saw racks formed bysplicing joint of the first racks and the second racks are formed on the outer side face of the sleeve main body; and the driving mechanism is provided with two driving gears which are engaged with the two saw racks on the sleeve main body correspondingly, and the driving gears are driven by a power mechanism.

Description

technical field [0001] The invention relates to a drilling casing device suitable for an offshore exploration ship and a construction method thereof. It is applicable to the technical field of marine exploration and drilling. Background technique [0002] All related buildings (structures) are developing towards the sea area, and the development of sea area has great potential. The offshore wind power project under the new energy construction has been promoted from the intertidal zone of the sea area to the offshore area. At the same time, the technical capabilities of marine survey With higher requirements and greater challenges, the business volume of offshore drilling has generally increased, and the innovation or beneficial improvement of this engineering technology field and construction technology methods has important engineering significance and economic value. [0003] At this stage, offshore drilling generally adopts the drilling platform added to the exploration ...

AI Technical Summary

Problems solved by technology

[0003] At present, offshore drilling generally adopts the drilling platform on the exploration ship. The construction methods and procedures are relatively cumbersome, and each procedure needs to consume a variety of equipment costs, time costs and labor costs.

Before the drilling construction, in order to prevent seawater erosion and borehole collapse, the casing is first inserted into the mud surface of the seabed, which disturbs the surface strata. At the same time, the drilling construction period is long, and the seawater experiences the water level changes of ebb and flow. The casing and the drilling platform Detachment or jacking phenomenon occurs, which leads to obstruction of construction. The conventional method is to adjust by adding or intercepting casing, which is time-consuming and laborious, resulting in economic waste. The quality of drilled core, drilling progress and drilling depth cannot be guaranteed.

Images