公开(公告)号：US10578530B2

公开(公告)日：2020-03-03

申请号：US15989712

申请日：2018-05-25

Applicant: China University of Petroleum-Beijing

Inventor： Guangqing Zhang ,  Ying Lin ,  Xiao Yang ,  Yuanyuan Wang

IPC: G01N3/00 ,  G01N3/10 ,  G01N33/24

Abstract: An experimental method for indoor real-time dynamic monitoring of a hydraulic fracture width, comprising the steps of: test piece preparation: assembling a prefabricating mold and fixing a fiber grating therein; mounting a simulated wellbore in the prefabricating mold, pouring agitated cement mortar into the prefabricating mold, and the cement mortar is solidified to form a test piece; mounting the test piece into a confining pressure chamber of a true triaxial hydraulic fracturing simulation device, connecting a liquid injection line to the true triaxial hydraulic fracturing simulation device, and connecting the fiber grating to a modem that is connected to a computer; hydraulic fracture width monitoring test: injecting liquid into the confining pressure chamber of the true triaxial hydraulic fracturing simulation device through the liquid injection line to apply three-direction confining pressures to the test piece, injecting liquid into the simulated wellbore, and starting the fiber grating and the modem to dynamically monitor the hydraulic fracture width in the test piece; and when a hydraulic fracture inside the test piece reaches an outer surface of the test piece, ending the test.

公开(公告)号：US20200056465A1

公开(公告)日：2020-02-20

申请号：US16257254

申请日：2019-01-25

Applicant: China University of Petroleum - Beijing

Inventor： Guangqing Zhang ,  Yuanxun Nie ,  Cankun Lin

IPC: E21B43/26 ,  E21B43/20 ,  E21B47/18

Abstract: A fracturing method for creating a complex crack network by intermittent fracturing on site, which relates to oil and gas field development, and comprises the following steps: pumping a fracturing fluid into an oil well to enter the reservoir, continuing pumping the fracturing fluid into fractured cracks after a pumping pressure has reached a preset pressure, and stopping pumping the fracturing fluid after a preset condition has been reached; performing under-pressure shut-in for the oil well; stopping the shut-in operation when a signal detecting vehicle cannot receive an obvious microseismic signal in the under-pressure shut-in process; repeating the above three steps multiple times; pumping the fracturing fluid into the oil well to enter the reservoir by the fracturing truck until an amount of the pumped in fracturing fluid reaches a design pump-in liquid amount; pumping a sand-carrying fluid into the oil well to enter the reservoir by means of a sand blending truck and the fracturing truck after the amount of the pumped in fracturing fluid has reached the design pump-in liquid amount, and stopping pumping the sand-carrying fluid after the pumped in sand-carrying fluid has reached a preset sand adding amount.

公开(公告)号：US20190293831A1

公开(公告)日：2019-09-26

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 ,  E21B47/00 ,  E21B47/024 ,  E21B49/00

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：US20190264544A1

公开(公告)日：2019-08-29

申请号：US16307936

申请日：2017-05-12

Applicant: China University of Petroleum-Beijing

Inventor： Zhongwei HUANG ,  Jingbin LI ,  Jilei NIU ,  Gensheng LI ,  Zhen CHENG

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

Abstract: 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：US20190226964A1

公开(公告)日：2019-07-25

申请号：US16138873

申请日：2018-09-21

Applicant: China University of Petroleum-Beijing

Inventor： Xiang'an YUE ,  Xin FANG ,  Weiqing AN ,  Wenhao TIAN ,  Jirui ZOU ,  Xuegang FENG ,  Wei FANG

IPC: G01N11/08

Abstract: A high-temperature, high-pressure, and low-velocity gas microtube viscosity measuring apparatus that comprises a thermotank, a fluid filtering and measuring device, a micro-pressure difference metering device, and a data acquisition and processing system. The fluid filtering and measuring device includes a filter, a microtube connector, a flow rate measuring liquid storage tank, an automatic micro-flow rate metering device, and an intermediate container connected in series via pipelines. The micro-pressure difference metering device is connected at two ends to pipelines at the two ends of the microtube connector via detection pipelines. The data acquisition and processing system is electrically connected to the micro-pressure difference metering device and the automatic micro-flow rate metering device to receive pressure difference data and flow rate data.

公开(公告)号：US10335773B2

公开(公告)日：2019-07-02

申请号：US14905719

申请日：2014-07-18

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： Baojian Shen ,  Hao Li ,  Yandan Wang ,  Jiancong Li ,  Lei Li ,  Bojun Shen ,  Baohua Shen ,  Wennian Wang ,  Delin Yuan ,  Honglian Xu

IPC: B01J27/185 ,  B01J27/198 ,  C01G45/04 ,  B01J23/80 ,  C10G45/04 ,  C10G45/60 ,  C10G45/46 ,  B01J37/03 ,  B01J37/08 ,  B01J37/20 ,  B01J35/10 ,  B01J37/00

Abstract: The present invention relates to a Fe-based hydrogenation catalyst having Fe as a primary active metal component, and zinc and potassium as a first co-active metal component. The molar ratio of the primary active metal component to the first co-active metal component is 0.5-200:1. The Fe-based hydrogenation catalyst in present invention overcomes the problem of limiting to the active metal components as used over decades for the conventional hydrogenation catalyst, and thus has long-term values for industrial application.

公开(公告)号：US10274634B2

公开(公告)日：2019-04-30

申请号：US15258749

申请日：2016-09-07

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： Lizhi Xiao ,  Guangzhi Liao ,  Qunjie Du ,  Xin Li ,  Sihui Luo

IPC: G01V3/32 ,  G01R33/34 ,  E21B47/00 ,  G01V3/14 ,  G01R33/341 ,  G01R33/38

Abstract: The present invention provides a nuclear magnetic resonance logging instrument probe with double-layered magnets and an antenna excitation method, the nuclear magnetic resonance logging instrument probe includes: a probe framework and a shielding layer arranged in the probe framework; a plurality of main magnets are provided above and below the shielding layer, respectively; central axes of the main magnets are parallel with each other, and distances between the central axes of each of the main magnets and a central axis of the probe framework are the same; a distance between central axes of any two main magnets is not smaller than a first preset value; and an antenna is provided at outer side of each main magnety. In the present invention, circumferential recognizing capability of the nuclear magnetic resonance logging instrument probe can be improved and three-dimensional (radial, axial and circumferential) stratum detection can be achieved.

公开(公告)号：US10266778B2

公开(公告)日：2019-04-23

申请号：US14940027

申请日：2015-11-12

Applicant: CHINA UNIVERSITY OF PETROLEUM—BEIJING

Inventor： Jinsen Gao ,  Liang Zhao ,  Chunming Xu ,  Tianzhen Hao ,  Xiaona Han

IPC: C10G67/02 ,  C10G67/06 ,  C10G67/00 ,  C10L1/06 ,  C10G21/16 ,  C10G21/27 ,  C10G25/00 ,  C10G45/08 ,  C10G45/64 ,  C10G45/68 ,  C10G67/04 ,  C10G69/00 ,  C10G69/04

Abstract: A method for upgrading fluid catalytic cracking gasoline includes the following steps: cutting fluid catalytic cracking gasoline into light, medium, and heavy gasoline fractions; subjecting the medium gasoline fraction to an aromatization/hydroisomerization reaction in the presence of a catalyst to obtain a desulfurized medium gasoline fraction; and blending the light gasoline fraction, the desulfurized medium gasoline fraction and the heavy gasoline fraction to obtain upgraded gasoline; where, a cutting temperature of the light and the medium gasoline fractions is 35-60° C., and a cutting temperature of the medium and the heavy gasoline fractions is 70-160° C. The method according to the present invention not only can realize deep desulfurization of fluid catalytic cracking gasoline, but also can improve octane number significantly.

公开(公告)号：US10253237B1

公开(公告)日：2019-04-09

申请号：US16130694

申请日：2018-09-13

Applicant: China University of Petroleum (Beijing)

Inventor： Guancheng Jiang ,  Deli Gao ,  Shuo Zhang ,  Yong Wang ,  Xianzhu Wu ,  Liexiang Han ,  Xiangzeng Wang ,  Chunyao Peng ,  Yinbo He ,  Fan Liu ,  Hongguo Zuo ,  Yongqing Zhang ,  Lili Yang ,  Zhong Li ,  Yanjun Li

IPC: C08G18/08 ,  C08G18/04 ,  C08G18/06 ,  C09K8/12

Abstract: The present invention relates to the well drilling field in the petroleum industry, particularly to film former used for coal-bed gas well drilling and preparation method thereof, drilling fluid and usage thereof. The preparation method of the film former includes: (1) controlling polycaprolactone diol and diisocyanate to have a first polymerization reaction in the presence of a polyurethane catalyst, to obtain a polyurethane prepolymer with two ends blocked by diisocyanate; (2) controlling the product of the first polymerization reaction to have a chain extension reaction with a polyalcohol; (3) controlling the product of the chain extension reaction and one part of hydroxyalkyl acrylate monomer to have an additive reaction, and then introducing the other part of hydroxyalkyl acrylate monomer and a styrene monomer, and emulsifying in water to obtain an emulsion; (4) mixing a radical initiator with the emulsion to have a second polymerization reaction.

公开(公告)号：US20180312937A1

公开(公告)日：2018-11-01

申请号：US15963219

申请日：2018-04-26

Applicant: China University of Petroleum-Beijing ,  Baoshan Iron & Steel Co., Ltd.

Inventor： Haobo Yu ,  Changfeng Chen ,  Zhonghua Zhang ,  Yanzhao Yu ,  Yameng Qi ,  Yuan Kuang ,  Ruijing Jiang ,  Xiaolan Jia ,  Junying Zhang ,  Lianwu Yu ,  Yaoheng Liu

IPC: C21D9/14 ,  C21D9/08 ,  C21D8/10 ,  C21D6/00 ,  C22C38/50 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  E21B17/00 ,  F16L58/00

Abstract: The invention provides a seamless line pipe with excellent resistance against corrosion by CO2—H2S-SRB. The line pipe comprises, by mass fraction, C: 0.03 to 0.10%, Si: 0.1 to 0.5%, Mn: 0.10% to 1.50%, P: 0.02% or less, S: 0.005% or less, Cr: 1.0 to 4.0%, Ni: 0.1 to 1.5%, Cu: 0.15 to 2.0%, Mo: 0.05 to 0.4%, Ti: 0.01 to 0.05%, RE: 0.05 to 0.1%, and balance of Fe. After smelting, rolling into a billet, and piercing and rolling into a pipe, the resultant steel pipe is heated to 920 to 1000° C. and kept for 0.3 to 1 hour depending on the thickness of the steel pipe wall, and then subjected to rapid cooling and tempering heat treatment. The seamless line pipe can be used in the field of oil and gas fluid transportation and the like.