China University of Petroleum

Guomin Yan

Baojiang Sun

Zhiyuan Wang

Hao Li

Yonghai Gao

Xuerui Wang

Yang Zhao

Ning Zhang

Zhennan Zhang

Ning Wang

Mingzhao Huang

Shuang Xu

The present invention relates to offshore oil and gas exploration drilling field and, in particular, to a surface layer conductor running tool for deep-water well drilling, which is used to run a conductor to a designated position, so that the drill stem can be released and the drilling can be continued. The surface layer conductor running tool for deep-water well drilling comprises a mandrel, an inner sleeve, an outer sleeve, and a main body, wherein the inner sleeve, the outer sleeve, and the main body are fitted over the mandrel sequentially; the inner sleeve can slide up and down but cannot rotate in relation to the mandrel, the outer sleeve and the inner sleeve are connected via a transmission thread pair, and the main body is situated on the inner sleeve; a retaining pawl penetrating the main body and radially slidable in horizontal direction; and an anti-rotation pin penetrating the main body and the outer sleeve, so that the outer sleeve can move up and down in the main body only, but cannot rotate.

Surface layer conductor running tool for deep-water well drilling

The present invention relates to deep-water drilling in petroleum engineering and, in particular, to a subsea wellhead pressure indicating and automatic adjusting device for deep-water dual-gradient drilling, comprising a subsea drilling fluid manifold system and a subsea wellhead pressure indicating and automatic adjusting system, wherein the subsea drilling fluid manifold system provides a flow channel for the drilling fluid returning through the wellbore so that the drilling fluid can smoothly return to a drilling platform, and provides a basis for the subsea wellhead pressure indicating and automatic adjusting system; and wherein the subsea wellhead pressure indicating and automatic adjusting system can display and adjust the subsea wellhead pressure in real time, in order to keep the subsea wellhead pressure to be constantly equal to the hydrostatic pressure of the seawater at the seabed. The present invention makes it possible to keep the subsea wellhead pressure to be constantly equal to the hydrostatic pressure of the seawater at the seabed in an automatic and real-time way, ensuring successful implementation of the dual-gradient drilling.

Subsea wellhead pressure indicating and automatic adjusting device for deep-water dual-gradient drilling

Growing community of inventors

Shandong, China

Guomin Yan