公开(公告)号：US20200040710A1

公开(公告)日：2020-02-06

申请号：US16601562

申请日：2019-10-14

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Yang TANG ,  Guorong WANG ,  Shouwei ZHOU ,  Qingyou LIU ,  Lin ZHONG ,  Wang LI ,  Qingping LI ,  Qiang FU ,  Yufa HE ,  Chuan WANG ,  Leizhen WANG

IPC: E21B43/01 ,  E21B7/128 ,  E21B7/04 ,  E21B17/18 ,  E21B43/36

Abstract: Disclosed is a device for solid-state fluidized mining of natural gas hydrates in a shallow seabed, including: a sea surface support system, a pipeline delivery system, and an undersea drilling system. The sea surface support system includes a hydrate drilling vessel floating on seawater. The pipeline delivery system includes a continuous double-layer oil pipe, a recyclable conduit installed in a sediment cover, an open-hole steering packer installed outside the recyclable conduit. The undersea drilling system includes a hydrate slurry separator, a single screw pump, a hydraulic motor, a jet head and a differential pressure sliding sleeve close to the hydrate drill bit. The present invention has the following beneficial effects. The device achieves a multi-directionally horizontal drilling and production in the hydrate reservoir with a single well head, improving the drilling efficiency and single well production.