公开(公告)号：US20220349292A1

公开(公告)日：2022-11-03

申请号：US17676250

申请日：2022-02-21

Applicant: Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) ,  Southwest Petroleum University

Inventor： Yang TANG ,  Zeliang LI ,  Guorong WANG ,  Xushen LI ,  Jiang LU ,  Xiaoyu FANG ,  Pengfei JING ,  Hairong ZHNAG ,  Lin ZHONG ,  Yufa HE ,  Qingping LI ,  Yanjun LI ,  Hexing LIU ,  Peng ZHAO

IPC: E21B43/36 ,  E21B43/34 ,  E21B43/01

Abstract: The disclosure discloses a solid fluidization tubular separator for marine natural gas hydrate, which includes a first separator and a second separator, wherein the first separator includes the first separation sleeve, the power liquid pipe, the swirl baffle, the recovery mechanism and the sand discharge mechanism. After the hydrate is sucked into the first separation sleeve to generate a circumferential velocity, so that the mud and sand with high density are separated to the pipe wall of the first separation sleeve, and the mud and sand separated to the pipe wall are settled down from the gap between the swirl baffle and the pipe wall along the pipe wall. The hydrate swirl flows into the recovery mechanism, and then leaves the first separation sleeve and enters the second separator, so as to realize the separation of mud and sand and natural gas hydrate.

公开(公告)号：US20230085283A1

公开(公告)日：2023-03-16

申请号：US17044125

申请日：2019-12-23

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Guorong WANG ,  Lin ZHONG ,  Qingyou LIU ,  Shouwei ZHOU ,  Xingyong YU ,  Zhong LI ,  Yang TANG ,  Qiang FU ,  Xin HUANG ,  Yanjun LI ,  Hexing LIU

IPC: E21B7/12 ,  E21B17/01 ,  E21B17/08 ,  E21B33/076

Abstract: A double-layer coiled tubing double-gradient drilling system, on the basis of conventional drilling equipment, includes a double-layer coiled tubing system, spacer fluid, a downhole lifting pump system, throttling control systems and a data monitoring system. Power fluid enters an annular space of the tubing through an adapter, passes through a downhole lifting pump, enters an inner pipe through a bridge channel, and enters the bottom hole through the drill bit. Return fluid enters an annular channel of the tubing through a recovery hole, then enters the inner pipe through the bridge channel and enters the lifting pump, and then enters a solid control system through the adapter and the control systems in sequence. Gradient control of the bottom hole pressure is realized through monitoring of the spacer fluid and control of the drilling pump unit and throttling control systems. The problem of narrow safe drilling density window is solved.