Abstract: A separation device with two-stage gas-liquid mixture and conical spiral fields is provided. A first-stage uniform mixer performs first-stage gas-liquid crushing and uniform mixing process by an outer micropore ceramic pipe, a middle micropore ceramic pipe and an inner micropore ceramic pipe and crushes large bubbles in the gas-liquid two-phase flow into small bubbles. A second-stage uniform mixer performs second-stage gas-liquid crushing and uniform mixing process. A whirlpool-making gas collector adjusts the gas-liquid uniform mixing flow obtained after two-stage gas-liquid uniform mixing into hollow-core type high-speed two-phase spiral flow. A conical degasser performs gas-liquid efficient separation operation in a high-speed conical spiral field.
Type:
Application
Filed:
December 4, 2021
Publication date:
March 16, 2023
Applicant:
China University of Petroleum (East China)
Inventors:
Chunhua Liu, Ji Chen, Zhongxian Hao, Xinfu Liu, Feng Liu, Yongjun Shi, Wenhao Sha, Hui Cheng, Junling Tao
Abstract: An intra-layer reinforcement method, and a consolidation and reconstruction simulation experiment system and an evaluation method for a gas hydrate formation are provided. In the intra-layer reinforcement method, the formation reconstruction and fracturing grouting reinforcement technologies are combined; a fracturing grouting process is adopted to create fractures in the gas hydrate formation; and a consolidation liquid enters the fractures and penetrates into the formation through a pressure difference to form a reinforcement with a ribbed slab structure and a specified strength and permeability, which supports the formation to achieve collapse prevention and sand prevention.
Type:
Application
Filed:
April 22, 2022
Publication date:
March 2, 2023
Applicant:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Abstract: A high efficiency smart steering drilling system includes a smart push force application tool and a centralizer. The centralizer is at an end close to a drill bit. The smart push force application tool is at an end away from the drill bit and includes a push force application wing rib having a telescoping function. The smart push force application tool is capable of automatically measuring an inclination angle and an azimuth angle and comparing the inclination angle and the azimuth angle with design values so as to control the push force application wing rib to output a push force in a telescopic manner based on a difference between the measured values and the design values and applying a push force to the drill bit. The drilling system achieves combined deflection under double action of drill bit push and pointing, greatly improving the deflection capability.
Type:
Grant
Filed:
March 9, 2021
Date of Patent:
February 28, 2023
Assignee:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Abstract: The present disclosure to a cementitious plugging wall solidifier for water-based drilling fluid and a preparation method thereof and a water-based drilling fluid.
Type:
Grant
Filed:
May 20, 2022
Date of Patent:
February 14, 2023
Assignee:
China University of Petroleum (East China)
Abstract: The present disclosure discloses a method for calculating an internal explosion load speed based on an incremental crack growth distance of a pipeline. The method includes steps of: respectively measuring at least three groups of distances between neighboring markings on forward and backward crack surfaces, and calculating the average values respectively to obtain the average incremental growth distances of forward and backward cracks; calculating the natural vibration frequency of the pipeline; and setting the ratio of backward crack speed to forward crack speed of the pipeline, then calculating the internal explosion load speed of the pipeline by a formula. The present disclosure provides a new effective method for calculating the internal explosion load speed based on the available parameters of the ruptured pipeline after explosion, which can provide a comparatively accurate estimation of internal explosion load speed, thereby providing references for inferring the explosion type occurred in the pipeline.
Type:
Grant
Filed:
July 22, 2019
Date of Patent:
January 31, 2023
Assignee:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Inventors:
Yang Du, Wenchun Jiang, Fan Zhou, Jinyang Zheng, Chaojie Wang, Guoming Chen
Abstract: A performance evaluation device and a design method of a cement for well cementing in a penetrated hydrate layer are provided. The performance evaluation device includes an equivalent wellbore, an inner circulation system, an outer circulation system, a thermal insulation cover, a bracket, a temperature sensing system, and a cement mold. The device can simulate a true downhole situation, conduct an evaluation experiment on the heat insulation performance of a cementing cement, and conduct experiments at different temperatures with automatic temperature control. The design method is to use a low-hydration, early-strength, and heat-insulating cement slurry system during the well cementing in a penetrated hydrate layer, where the low-hydration and early-strength characteristics ensure the effective sealing of a hydrate layer during a cementing process, and the heat insulation characteristic results in low heat conductivity and thus can ensure the stability of a hydrate layer during a production operation.
Type:
Grant
Filed:
January 21, 2022
Date of Patent:
January 31, 2023
Assignee:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Inventors:
Huajie Liu, Yuhuan Bu, Shenglai Guo, Chang Lu, Xinyang Guo, Shengda Shen, Rui Ma
Abstract: The present disclosure belongs to the field of petroleum engineering, and specifically relates to a subsea Christmas tree re-prediction method integrating Kalman filter and Bayesian network. The subsea Christmas tree re-prediction method integrating Kalman filter and Bayesian network includes three steps: digital twin model establishment, degradation process re-prediction model establishment, and remaining useful life calculation model establishment.
Type:
Application
Filed:
November 5, 2021
Publication date:
January 26, 2023
Applicants:
China University of Petroleum (East China), Ocean University of China, Beihang University
Abstract: The present disclosure relates to the technical field of oilfield chemistry. A flocculating agent for removing oil-based drilling fluid rock cuttings and a preparation method and a use thereof.
Type:
Application
Filed:
July 5, 2022
Publication date:
January 19, 2023
Applicant:
China University of Petroleum (East China)
Abstract: An experimental device and method for testing foam fluid properties and defoaming separation effects, the experimental device including a foam generation module configured to generate a foam fluid, an experimental loop configured to transport the foam fluid and enable the foam fluid to sufficiently develop in a loop, a foam property test module configured to test foam fluid properties, a foam separation processing module configured to separate foam from fluid and gas, and a defoaming result evaluation module configured to test and evaluate defoaming results. In the method, different foam fluids are generated in the foam generation module and are transported to the foam property test module and different foam separation processing modules through the experimental loop, and the foam properties of the foam fluids and defoaming separation effects are measured by the foam property test module and the defoaming result evaluation module connected to the foam separation processing module.
Type:
Application
Filed:
November 3, 2020
Publication date:
December 29, 2022
Applicant:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Abstract: A method of leak detection for oil and gas pipeline based on excitation response and system thereof includes: applying an active excitation signal (a pressure pulse directly input by human) or a passive excitation signal (a pressure fluctuation caused by opening and closing valves, etc.) to an oil and gas pipeline with existing leakage points, the excitation signal is reflected at the pipeline boundary and the leakage, and the reflected pressure wave continues to propagate to upstream and downstream, and finally is collected by the dynamic pressure transducer, then the existing leakage of the pipeline is detected and positioned by analyzing the transient response signal and the reflected pressure wave of leakage signal.
Type:
Application
Filed:
September 24, 2020
Publication date:
December 15, 2022
Applicants:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), PIPECHINA SOUTH CHINA COMPANY, GUANGDONG SOUTH CHINA INTELLIGENT PIPELINE RESEARCH INSTITUTE
Abstract: A method for recommending a drilling target of a new well based on cognitive computing is provided, including: establishing a reservoir geological model; acquiring a dynamic parameter and a static parameter; establishing multiple fuzzy rules bases; inputting the dynamic and static parameters into the fuzzy rules base to obtain aggregated output fuzzy sets of membership values; defuzzifying the fuzzy set of the membership values to obtain crisp values of the fuzzy variables; inputting the crisp values into the fuzzy rules base to obtain a aggregated output fuzzy set of DA membership values of drilling attractiveness DA as a fuzzy variable; defuzzifying the DA to obtain a score of the DA; establishing a drilling attractiveness region with a radius R by taking each grid as a center; calculating region drilling attractiveness RDA score of the region; and determining a region with a highest score as the location of the new well.
Type:
Application
Filed:
July 15, 2021
Publication date:
December 8, 2022
Applicant:
China University of Petroleum (East China)
Abstract: A ternary water control and gas recovery method suitable for an unconsolidated siltstone gas reservoir is provided. It includes the following steps: first, running a silt control screen pipe manufactured by an interface hydrophobic modification into a wellbore to realize wellbore water control and silt control; second, filling a surface hydrophobic modified gravel in an annular space between the silt control screen pipe and the wellbore to form a hydrophobic gravel packing layer for water control and silt control; third, injecting a wetting agent aqueous solution into a stratum, and performing a hydrophobic modification on a gas reservoir seepage channel surface to realize in-situ waterblocking and silt migration of the unconsolidated siltstone gas reservoir, and then closing a well for a preset time before exploitation.
Type:
Grant
Filed:
March 18, 2022
Date of Patent:
November 1, 2022
Assignee:
CHINA UNIVERSITY OF PETROLEUM(EAST CHINA)
Abstract: A method for catalytic cracking of naphtha is provided. Naphtha is catalytically cracked under the action of a catalyst. The catalyst includes aluminosilicate, alkali metal oxide, alkaline earth metal oxide, TiO2, iron oxide, vanadium oxide and nickel oxide. On the other hand, a rapid separation component is arranged in a disengager of a catalytic cracking reaction device, so that a transport disengaging height is greatly reduced without changing a gas flow and a diameter of the disengager. In addition, the separation efficiency of oil gas and the catalyst is improved.
Type:
Grant
Filed:
September 19, 2019
Date of Patent:
October 18, 2022
Assignees:
SHANGHAI SUPEZET ENGINEERING TECHNOLOGY CO., LTD., JIANGSU BOSONG CHEMICAL TECHNOLOGY CO., LTD., HANYI SHENFEI NEW MATERIALS CO., LTD., CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Abstract: The present discloses a water-based gel-consolidation type lost circulation material system suitable for fractured lost circulation formation, preparation method and use thereof.
Type:
Grant
Filed:
December 29, 2021
Date of Patent:
October 18, 2022
Assignee:
China University of Petroleum (East China)
Abstract: The present invention relates to the field of composite membrane and discloses a polyurethane/polyvinylidene fluoride composite membrane for extracting organic sulfide from naphtha. The polyurethane/polyvinylidene fluoride composite membrane includes an active layer and a support layer where the active layer is a polyurethane casting membrane and the support layer is a polyvinylidene fluoride membrane. The polyurethane/polyvinylidene fluoride composite membrane is prepared by coating the active layer onto the support layer. At the same time, a preparation method for the polyurethane/polyvinylidene fluoride composite membrane is disclosed. The present invention has the following beneficial effects: the polyurethane/polyvinylidene fluoride composite membrane prepared in the present invention may be used to extract organic sulfide in naphtha with high separation efficiency.
Type:
Grant
Filed:
December 31, 2018
Date of Patent:
October 4, 2022
Assignee:
CHINA UNIVERSITY OF PETROLEUM(EAST CHINA)
Abstract: The present disclosure relates to the technical field of oil-gas field development, and discloses a shale oil fracturing synchronous energizing simulation experimental device and method. The shale oil fracturing synchronous energizing simulation experimental device comprises a liquid supply system, a confining pressure loading system, a fracturing system, an energizing system and a recovery system, wherein the liquid supply system is used for storing fluid and can inject the fluid into the fracturing system; the fracturing system can bear a test piece, receive the fluid injected by the liquid supply system and serve as seepage space of the fluid; the confining pressure loading system is used for providing simulated confining pressure for the test piece; the energizing system is used for simulating an energizing effect on a test piece after fracturing liquid is injected; and the recovery system is used for collecting discharged liquid and separating and metering the discharged liquid.
Type:
Application
Filed:
March 11, 2022
Publication date:
September 22, 2022
Applicant:
China University of Petroleum (East China)
Inventors:
Sen Wang, Qihong Feng, Yichun Wang, Xianmin Zhang, Jiyuan Zhang, Xian Shi
Abstract: A mussel bionic gel composition includes: a mussel bionic copolymer and/or a mussel bionic compound, a cross-linking agent and water, wherein the mussel bionic copolymer includes a structural unit A from a vinyl monomer and a structural unit B from a vinyl-containing mussel bionic catechol group monomer; and the mussel bionic compound includes polyacrylamide and a mussel bionic catechol compound. The self-growth gel particle profile control and water plugging agent prepared from the composition is low in initial apparent viscosity, easy to inject and far in migration, has good shear repairing performance and is particularly applicable to a low-permeability fractured reservoir, thereby adjusting a micro-fracture network, improving a fracture channel and increasing waterflood efficiency and recovery efficiency.
Type:
Grant
Filed:
November 17, 2021
Date of Patent:
August 30, 2022
Assignee:
China University of Petroleum (East China)
Inventors:
Caili Dai, Lin Li, Jiawei Liu, Zhongzheng Xu, Guang Zhao, Mingwei Zhao, Yining Wu, Yongpeng Sun
Abstract: A high-temperature resistant, high-strength, and thixotropic gel plugging agent is composed of 8-20% of acrylamide monomer, 0.05-0.5% of reactive polymer, 0.1-1.0% of organic polymer cross-linker, 3.0-8.0% of resin toughening agent, 1.0-5.0% of flow pattern regulator, 0.01-0.5% of cross-linking regulator by the weight in the water. The gel solution shows a low apparent viscosity during the shear flow and is easy to be pumped into the wellbore and then into the formation leakage layer; after the pumping stops, the gel solution shows rapidly increased viscosity and strong adhesive force, and form a high-strength barrier between the wellbore and the formation, preventing the drilling fluid from further leaking.
Type:
Grant
Filed:
December 3, 2020
Date of Patent:
August 23, 2022
Assignee:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Abstract: The present invention relates to the field of natural gas production, and discloses a well structure for natural gas hydrate production, which comprises: a natural gas production well (12); an injection well (4) capable of extending into a geothermal reservoir and injecting a heat-carrying fluid; a curved connecting well (7), the inlet end of the curved connecting well (7) is connected to the outlet end of the injection well (4); a hydrate production horizontal well (10), which may be arranged in a shallow hydrate reservoir (9), the curved connecting well (7) and the hydrate production horizontal well (10) are connected by an ascending well section (8). With the above technical scheme, the high curvature connected well connecting the horizontal well and the vertical well can be located in the bottom layer below the hydrate reservoir, enhancing the stability and production efficiency of the gas hydrate production well.
Type:
Grant
Filed:
May 7, 2020
Date of Patent:
August 2, 2022
Assignees:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), SELSKAPET GUDME STAD AS, CIMC OFFSHORE ENGINEERING RESEARCH INSTITUTE CO. LTD.
Abstract: A performance evaluation device and a design method of a cement for well cementing in a penetrated hydrate layer are provided. The performance evaluation device includes an equivalent wellbore, an inner circulation system, an outer circulation system, a thermal insulation cover, a bracket, a temperature sensing system, and a cement mold. The device can simulate a true downhole situation, conduct an evaluation experiment on the heat insulation performance of a cementing cement, and conduct experiments at different temperatures with automatic temperature control. The design method is to use a low-hydration, early-strength, and heat-insulating cement slurry system during the well cementing in a penetrated hydrate layer, where the low-hydration and early-strength characteristics ensure the effective sealing of a hydrate layer during a cementing process, and the heat insulation characteristic results in low heat conductivity and thus can ensure the stability of a hydrate layer during a production operation.
Type:
Application
Filed:
January 21, 2022
Publication date:
July 28, 2022
Applicant:
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Inventors:
Huajie LIU, Yuhuan BU, Shenglai GUO, Chang LU, Xinyang GUO, Shengda SHEN, Rui MA