公开(公告)号：US20210054254A1

公开(公告)日：2021-02-25

申请号：US17080173

申请日：2020-10-26

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： YANGCHUAN KE ,  CHENGCHENG YU

IPC: C09K8/035 ,  C09K8/03

Abstract: The present disclosure provides a drilling fluid lubricant and a preparation method and use thereof. The preparation method includes steps of: 1) mixing styrene and water, then adding a nano-inorganic intermediate, a crosslinking agent and an emulsifier and stirring to obtain a first mixture; 2) under an inert atmosphere, stirring the first mixture to obtain an intermediate emulsion; then heating the intermediate emulsion to 70-85° C., then adding an initiator, keeping temperature and stirring for 7-10 hours to obtain an emulsion of polystyrene nanocomposite with a particle size of 40-90 nm; the emulsion of polystyrene nanocomposite being sequentially subjected to a granulating treatment to obtain polystyrene nanocomposite particles; 3) mixing industrial base oil, polystyrene nanocomposite particles and industrial oleic acid, and stirring evenly at room temperature to obtain the drilling fluid lubricant.

公开(公告)号：US10921480B2

公开(公告)日：2021-02-16

申请号：US16362590

申请日：2019-03-22

Applicant: CHINA UNIVERSITY OF PETROLEUM—BEIJING

Inventor： Lizhi Xiao ,  Guangzhi Liao ,  Zhe Sun ,  Xin Li ,  Sihui Luo

IPC: G01V3/32 ,  E21B47/024 ,  E21B49/00 ,  E21B47/002

Abstract: The application provides a downhole three-dimensional scanning nuclear magnetic resonance imaging logging instrument and a probe, an antenna thereof, wherein the antenna comprises: an radio frequency antenna, an orienting device and a rotating device; the radio frequency antenna is fixed on an outer surface of the orienting device, and the orienting device is arranged on a magnet, the rotating device is fixed on the magnet; the rotating device is movably connected to the orienting device; and the rotating device is configured to drive the orienting device to rotate relative to the magnet, such that the radio frequency antenna on the orienting device can be drived to rotate, and echo signals in different directions can be acquired by the radio frequency antenna. The purpose of multi-directional measurement can be achieved, and the overall properties of an undisturbed stratum can be reflected by the applicant.

公开(公告)号：US20210025268A1

公开(公告)日：2021-01-28

申请号：US16757569

申请日：2018-12-31

Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

Inventor： Chuanliang YAN ,  Xu REN ,  Yuanfang CHENG ,  Wanqing TIAN ,  Yang LI ,  Qingchao LI ,  Jia WEI ,  Benjian SONG

IPC: E21B43/30 ,  E21B43/08 ,  E21B7/04

Abstract: Disclosed is a new drilling casing, including a casing wall and several sand control apparatuses disposed on the casing wall in a spacing, wherein each sand control apparatus includes a sand control net, a sealing steel sheet and a sealing rubber plug, a plurality of mutually-paralleled sand control meshes are disposed on the sand control net, the sand control mesh exactly faces the sealing steel sheet, and the sand control net is connected with the sealing steel sheet through a steel pin. Further a method of performing fast drilling and completion of a large-borehole multilateral well by using the new drilling casing is disclosed. a main borehole is formed by drilling to a destination well depth at one time with a large size drill bit, a lateral borehole is then drilled in a natural gas hydrate reservoir by using the new drilling casing, and then, the drill bit is taken out for completion. The method is applicable to various natural gas hydrate extraction manners. The method greatly increases production and recovery rate of a hydrate well by integrating well drilling and completion in a shorter drilling and completion period, thereby saving lots of labor and materials, and ensuring effective sand control.

公开(公告)号：US10889742B1

公开(公告)日：2021-01-12

申请号：US16887869

申请日：2020-05-29

Applicant: CHINA UNIVERSITY OF PETROLEUM (BEIJING) ,  Beijing Shida Bocheng Technology Co., Ltd

Inventor： Guancheng Jiang ,  Yinbo He ,  Lili Yang ,  Kai Wang ,  Tengfei Dong ,  Xiaohu Quan ,  Kaixiao Cui ,  He Shi

IPC: C09K8/035 ,  C08G69/48 ,  C09K8/05

Abstract: The present disclosure relates to the technical field of water-based drilling fluid, in particular to a modified polyhistidine suitable for being used as a supramolecular shale inhibitor, a method of preparing the same, and its application in water-based drilling fluids. The modified polyhistidine has a histidine polymerization main chain comprising a structural unit, which is represented by Formula (1) and attached with a modifying group, and the histidine polymerization main chain has a histidine polymerization degree of 6-9. The modified polyhistidine provided by the present disclosure is a degradable biological material and has the advantage of environmental friendliness; when the modified polyhistidine is used as a shale inhibitor, it can take advantage of its supermolecular property to effectively inhibit the hydration expansion of montmorillonite which is the most important expansion mineral in shale, and exhibits excellent inhibition effect and desirable temperature resistance.

公开(公告)号：US10858571B2

公开(公告)日：2020-12-08

申请号：US16752971

申请日：2020-01-27

Applicant: China University of Petroleum (East China) ,  Chengdu OMAX Petroleum Technology Co., Ltd

Inventor： Chengwen Wang ,  Yucheng Xue ,  Wei Zhou ,  Ruihe Wang ,  Jinsheng Sun ,  Yong Li ,  Changqiang Tang

IPC: C09K8/467 ,  C04B28/02 ,  C04B40/00 ,  C04B24/16 ,  C08F220/58 ,  C04B103/22

Abstract: The present disclosure relates to a high-temperature retarder suitable for oil and gas well cementation, a preparation method thereof and a cementing slurry.

公开(公告)号：US20200371490A1

公开(公告)日：2020-11-26

申请号：US16704664

申请日：2019-12-05

Applicant: China University of Petroleum (East China)

Inventor： Baoping CAI ,  Yonghong LIU ,  Wenchao LI ,  Xiangdi KONG ,  Xiaoyan SHAO ,  Hongqi XU ,  Xincheng LI ,  Yandong CHEN ,  Renjie JI ,  Zengkai LIU ,  Libing LIU ,  Rikui ZHANG ,  Yuqian YANG ,  Shitang LIU ,  Xin WEI

IPC: G05B19/406 ,  G06N7/00

Abstract: The present disclosure belongs to the field of offshore oil, and in particular relates to a method for assessing the safety integrity level of offshore oil well control equipment. The method for assessing the safety integrity level of the offshore oil well control equipment comprises three major steps: creating a safety instrumented function evaluation module and dividing the related devices for performing the safety instrumented functions into a sensor subsystem; a controller subsystem and an actuator subsystem, establishing a dynamic Bayesian network model for respective subsystems for calculation; and integrating, analyzing and optimizing the safety integrity data of the subsystems.

公开(公告)号：US20200370387A1

公开(公告)日：2020-11-26

申请号：US16923429

申请日：2020-07-08

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： Yanbin WANG ,  Deli GAO ,  Jun FANG ,  Jing ZENG

IPC: E21B33/043 ,  E21B33/14 ,  E21B34/04 ,  E21B23/01 ,  E21B33/12

Abstract: A casing hanger and annulus sealing device running tool for deepwater drilling and a method for using the same. The running tool includes a spindle connected to a hollow suspension structure via a torque transmission structure, one end of the spindle slidably passes through a hollow piston, the suspension structure rotates with the spindle and slide along the piston, the inner cavity of the torque transmission structure communicates with that of the suspension structure to form a piston cavity; the piston cavity and the piston form a hydraulic piston structure; and one end of the suspension structure away from the torque transmission structure can rotatably hook to and lift upward to release the annulus sealing device, and one end of the piston away from the torque transmission structure can radially expand to hook to the casing hanger and can radially contract to release the casing hanger.

公开(公告)号：US10822913B2

公开(公告)日：2020-11-03

申请号：US16242099

申请日：2019-01-08

Applicant: China University of Petroleum—Beijing

Inventor： Yiqun Zhang ,  Ya Liu ,  Gensheng Li ,  Zhongwei Huang ,  Huaizhong Shi ,  Xianzhi Song ,  Mao Sheng ,  Lu Ji

IPC: E21B33/13 ,  E21B29/02 ,  F42D3/00

Abstract: A plugging and wall reinforcing device and a method of using thereof. The nesting plugging and wall reinforcing device comprises an external slotted metal pipe and an internal nested blasting tool, wherein the slotted metal pipe has spiral slits or straight slits cut on a pipe wall thereof; the nested blasting tool is a mandrel having a surface provided with a plurality of explosive grooves in which explosives are placed; the slotted metal pipe is disposed around the mandrel, with a movable fit therebetween. The present invention can effectively improve the plugging success rate.

公开(公告)号：US10822554B2

公开(公告)日：2020-11-03

申请号：US16671481

申请日：2019-11-01

Applicant: China University of Petroleum (East China)

Inventor： Yuanyu Tian ,  Yingyun Qiao ,  Jinhong Zhang ,  Peijie Zong ,  Yuanjun Che ,  Yuan Jiang ,  Fanfan Xu

IPC: C10G55/06 ,  C10G31/10

Abstract: The present disclosure discloses an integrated device for millisecond-level gas phase catalytic cracking reaction and separation, comprising: a horizontal inertial cyclone separator, a horizontal inertial cyclone separator feed tube, a pyrolysis vapour inlet, a regenerated catalyst inlet, a horizontal inertial cyclone separator central tube, a cracked vapour outlet, a catalyst outlet tube, a spent catalyst silo, a first loop-seal, a riser regenerator, a settling tank, a gas-solid separator, and a second loop-seal.

公开(公告)号：US10815253B2

公开(公告)日：2020-10-27

申请号：US16459443

申请日：2019-07-01

Applicant: China University of Petroleum-Beijing

Inventor： Guangjin Chen ,  Bei Liu ,  Hai Li ,  Mingke Yang ,  Changyu Sun ,  Wan Chen

IPC: C07F3/06 ,  C07D235/06 ,  C07D233/56 ,  C07F15/06

Abstract: The present invention provides a preparation method for zeolitic imidazolate frameworks. The preparation method comprises: adding a metal carbonate or oxide, an organic ligand to a hydrophilic liquid to obtain a mixture; introducing an acidic gas to reach a reaction pressure of 0.1 MPa to 2.0 MPa, and reacting for a predetermined time; heating to 30° C.-60° C. and vacuuming to obtain the zeolitic imidazolate framework. The present invention also provides a zeolitic imidazolate framework obtained by the above preparation method. The preparation method according to the present invention is environmentally friendly and has a high yield.