公开(公告)号：US20190264544A1

公开(公告)日：2019-08-29

申请号：US16307936

申请日：2017-05-12

申请人： China University of Petroleum-Beijing

发明人： Zhongwei HUANG ,  Jingbin LI ,  Jilei NIU ,  Gensheng LI ,  Zhen CHENG

IPC分类号： E21B41/00 ,  E21B7/04 ,  E21B7/06

摘要： The present invention provides an auxiliary feeding device for a flexible pipe of a radial horizontal well, comprising an oil pipe, a steering gear connected to the oil pipe at a lower opening thereof, and two impellers; an upper end surface of the steering gear is provided with an accommodating groove; the steering gear is internally provided with a through steering passage in an axial direction thereof for allowing an external flexible pipe to pass through; an inlet of the steering passage is located at a bottom wall of the accommodating groove, and an outlet of the steering passage is located at a lower portion of a sidewall of the steering gear; the two impellers are symmetrically disposed on two sides of the inlet; each of the impellers comprises an impeller shaft, a barrel body rotatably surrounding the impeller shaft, and at least three blades fixed outside the barrel body and provided at a top thereof with a notch, wherein the two impeller shafts are parallel to each other; the two impellers are synchronously rotated relative to each other, and the notches on two sides of the inlet are in one-to-one correspondence relation to form a holding passage that can clamp the flexible pipe; the flexible pipe enters the steering passage through the oil pipe, the holding passage, and the inlet in sequence, and protrudes from the outlet; fluid injected through an upper opening of the oil pipe drives the impellers to rotate downward, and causes the flexible pipe to be fed downward. The present invention can enable the flexible pipe to overcome frictional resistance effectively and be fed continuously and stably.

公开(公告)号：US20240352795A1

公开(公告)日：2024-10-24

申请号：US18197026

申请日：2023-05-12

申请人： China University of Petroleum-Beijing

发明人： Wenhao HE ,  Chao XIONG ,  Ran JI ,  Huaizhong SHI ,  Zhongwei HUANG ,  Zhenliang CHEN ,  Zongjie MU ,  Xinkang FU

IPC分类号： E21B1/14 ,  E21B1/26 ,  E21B21/01 ,  E21B47/06

CPC分类号： E21B1/14 ,  E21B1/26 ,  E21B21/013 ,  E21B47/06

摘要： An experimental apparatus for rock-breaking through vibration impact, including a confining pressure loading assembly, a drill bit, a drill rod, a drilling fluid circulation assembly, a rotary impact assembly and an axial impact assembly. The confining pressure loading assembly is configured to apply pressures to a core sample located in a core cavity in three directions perpendicular to each other. The drill bit is capable of inserting into the core cavity to drill the core sample. The drilling fluid circulation assembly includes a drilling fluid inlet, a drilling fluid outlet and a mud pump connected therebetween. The rotary impact assembly includes a hydraulic rotary motor and a hydraulic swing motor connected to the drill rod, respectively. The axial impact assembly includes a first hydraulic cylinder, and a servo linear actuator connected to the first hydraulic cylinder and the drill rod.

公开(公告)号：US20180283735A1

公开(公告)日：2018-10-04

申请号：US15869910

申请日：2018-01-12

申请人： China University of Petroleum-Beijing

发明人： Xianzhi SONG ,  Gensheng LI ,  Zhongwei HUANG ,  Shouceng TIAN ,  Haizhu WANG ,  Huaizhong SHI ,  Mao SHENG ,  Yiqun ZHANG ,  Jingbin LI ,  Yu SHI

IPC分类号： F24T10/17 ,  E21B43/30 ,  E21B47/04 ,  E21B7/04 ,  E21B43/08 ,  E21B33/14 ,  E21B49/00

CPC分类号： F24T10/17 ,  E21B7/04 ,  E21B33/14 ,  E21B41/0035 ,  E21B43/088 ,  E21B43/305 ,  E21B47/04 ,  E21B49/00 ,  F24T10/20 ,  F24T2010/53 ,  Y02E10/125

摘要： The present disclosure provides a hydrothermal geothermal development method of multilateral well closed circulation, comprises the steps of: dividing a geothermal reservoir into single layers according to geothermal reservoir geological conditions, wherein an upper single layer with a lower water temperature and a higher permeability is taken as a recharge layer, and a lower single layer with a higher water temperature is taken as a production layer; tripping a production casing, and injecting cement for well cementation; performing casing lateral windowing in a vertical hole corresponding to the recharge layer, and drilling several branch radial horizontal holes into the recharge layer; performing casing lateral windowing in the vertical hole corresponding to the production layer, and drilling several branch radial horizontal holes into the production layer; tripping a guiding pipe into the production casing of the vertical hole, with a depth thereof reaching a well section between the recharge layer and the production layer; tripping a packer at a guiding shoe to isolate the guiding pipe and an annulus of the casing from each other, so as to prevent geothermal fluid of the recharge layer and the production layer from being communicated with each other in the vertical hole.

公开(公告)号：US20240254837A1

公开(公告)日：2024-08-01

申请号：US18634327

申请日：2024-04-12

申请人： China University of Petroleum-Beijing

发明人： Zhongwei HUANG ,  Gensheng LI ,  Huaizhong SHI ,  Xiaoguang WU ,  Shouceng TIAN ,  Xianzhi SONG ,  Haizhu WANG ,  Mao SHENG ,  Jingbin LI ,  Ruiyue YANG ,  Xin LIU

IPC分类号： E21B7/06 ,  E21B7/04 ,  E21B17/20 ,  E21B29/06 ,  E21B37/02

CPC分类号： E21B7/061 ,  E21B7/046 ,  E21B17/20 ,  E21B29/06 ,  E21B37/02

摘要： A coiled tubing flexible drill rod ultra-short radius radial drilling method, including: when in a first operation mode, activating a screw motor and a flexible power drilling tool located at a lower part of a coiled tubing; when in a second operation mode, only activating the screw motor and deactivating the flexible power drilling tool; and when in a third operation mode, only activating the flexible power drilling tool connected to the drill bit below. A corresponding drilling string and system are also disclosed. The method and system can achieve the effects of a small deflecting radius, an adjustable deflecting angle, a high operating efficiency and a low risk.