China University of Petroleum

Qingdao University of Technology

Chongqing University

Shanghai Jinzhao Energy Saving Technology Co., Ltd

Ocean University of China

Beihang University

Yonghong Liu

Baoping Cai

Renjie Ji

Xincheng Li

Rikui Zhang

Peng Liu

Shitang Liu

Zengkai Liu

Yandong Chen

Libing Liu

Yuqian Yang

Xin Wei

Qingyun Li

Xiaopeng Li

Xiaoyan Shao

Hongqi Xu

Changhe Li

Yanbin Zhang

Min Yang

Yali Hou

Huajun Cao

Naiqing Zhang

Dongzhou Jia

Runze Li

Wenfeng Ding

Wentao Wu

Xiufang Bai

Menghua Sui

Qingan Yin

Lan Dong

Zhenjing Duan

Qiang Sun

Yancong Han

Xinlei Wu

Teng Gao

Cong Mao

Chao Yang

Xiangdi Kong

Chuntan Gao

Guijie Liu

Hang Dong

Fan Zhang

Dege Li

Yanping Zhang

Yingying Wang

Rui Zhang

Gan Li

Shibo Wu

Longyang Wang

Guoqing Hu

Yixin Zhao

Lei Gao

Qibing Wu

Wanhai Xu

Zheng Yuan

Chenyushu Wang

Zhongfei Sui

Weifeng Ge

Gao Teng

Yi Zhao

Chaoyang Sheng

Quansheng Zhang

Qiang Feng

Qilin Wu

Xuelin Liu

Xiaolu Wu

Honghui Wang

Rui He

Zhexian Zou

Hongyan Fan

Wenchao Li

Provided are an intelligent operation and maintenance optimization method and intelligent production optimization method for an offshore oil subsea production system (SPS), and a system, relating to the field of petroleum engineering. The operation and maintenance optimization method includes: determining whether there is a leak in an SPS; and if there is a leak, performing emergency repair; or if there is no leak, performing intelligent operation and maintenance optimization. The performing intelligent operation and maintenance optimization includes: calculating a static health index of the SPS based on ashore sensor status data and Christmas tree sensor data; obtaining dynamic health indexes at different moments through a Kalman filtering algorithm; and formulating an optimal maintenance strategy for the SPS with optimization objectives of maximizing toughness and minimizing a maintenance cost.

Intelligent operation and maintenance optimization method and intelligent production optimization method for offshore oil subsea production system (SPS), and system

The present invention belongs to the field of quality control of processed products, and discloses a digital twin control system for product processing quality. The digital twin control system establishes a real-time interactive digital twin system completely matched with an actual processing system according to the working principle of a CNC (Computer Numerical Control) system and the control strategy of a feedback loop of each moving part of the machine tool, extracts real-time following errors of each moving part of the machine tool during processing under different load fluctuations with respect to control needs for product processing quality, and establishes a dynamic digital twin control system for product processing quality through point-to-point real-time mapping, so as to achieve real-time monitoring of product quality. Processing parameters under stable following errors can be obtained based on the established digital twin control system to achieve real-time control of product processing quality.

Digital twin control system for product processing quality

The present disclosure relates to a method and system for evaluating the macro resilience of offshore oil well control equipment. The method for evaluating the macro resilience of offshore oil well control equipment comprises six steps: determining the type and strength of external disaster; calculating the failure rate of components; calculating the recovery rate of the components; modeling the BN for a degradation process; modeling the BN for a maintenance process; and calculating the resilience of the offshore oil well control equipment. A system for evaluating the macro resilience of offshore oil well control equipment comprises an external disaster evaluation module, a component failure rate calculation subsystem, a reliability degradation process simulation module, a fault identification module, a component recovery rate calculation module, a reliability recovery process simulation module, a reliability change curve derivation unit and an resilience calculation unit.

Method and system for evaluating macro resilience of offshore oil well control equipment

The disclosure provides a milling system and method under different lubrication conditions. The system uses a tool to mill the workpiece, a force measuring system to measure the milling force, a tool change system to replace the tools, a tool storage to store the tools. It can store the tools, provide the lubricating oil to the milling surface, select different tools according to different processing conditions, select the best angle differences of the unequal spiral angle tools according to different conditions comprising dry cutting, casting-type lubrication, minimal quantities of lubrication or minimal quantities of nanofluid lubrication, and/or choose the optimal tool according to different cutting parameters in order to obtain the minimum milling force.

Milling system and method under different lubrication conditions

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. The subsea Christmas tree re-prediction system integrating Kalman filter and Bayesian network includes a subsea distribution unit information acquisition subsystem mounted on an subsea distribution unit, a subsea control module information acquisition subsystem mounted on a subsea control module, a subsea valve bank information acquisition subsystem mounted on a subsea valve bank, a wellhead mechanical module information acquisition subsystem mounted on a wellhead mechanical module, a subsea environmental information acquisition module mounted on a subsea control module, and a subsea Christmas tree digital twin subsystem mounted in an overwater control station.

Subsea Christmas tree re-prediction method integrating Kalman filter and Bayesian network

The present disclosure belongs to the field of marine engineering, and in particular relates to a method and system for guaranteeing the safety of offshore oil well control equipment. The method comprises: identifying the state of a main structure of the offshore oil well control equipment, identifying the state of a hydraulic control unit of offshore oil well control equipment, identifying the state of an electronic control unit of offshore oil well control equipment, predicting the state of the offshore oil well control equipment and making a real-time decision based on existing information; and the system for guaranteeing the safety of the offshore oil well control equipment comprises a state identification subsystem of a main structure, a state identification subsystem of the hydraulic control unit, a state identification subsystem of the electronic control unit and a state prediction and real-time decision subsystem.

Method and system for guaranteeing safety of offshore oil well control equipment

A multi-path combined high-low voltage plasma drilling method, a drill bit for drilling and a drill bit apparatus for drilling utilizing this method. The drilling method includes: disposing a plurality of mutually independent plasma generators on a plasma drill bit, wherein the plasma generators are independently connected to a plasma power source on the ground through wires; allowing each of the plasma generators to eject high-frequency pulsed plasma arc under the control of its corresponding combined high-low voltage pulse power source on the ground; ejecting the high-frequency pulsed plasma arc onto a wall of a drilling well, forming impulsive high temperature thermal shock stress inside the rocks on the wall of the drilling well; and breaking the rocks under the shock of thermal stress to form rock debris.

Multi-path combined high-low voltage plasma drilling method, drill bit for drilling and drill bit apparatus for drilling

An embodiment of the present disclosure provides a multi-path combined high-low voltage plasma drilling power source and drilling system. The multi-path combined high-low voltage plasma drilling power source comprises a high-voltage DC circuit, low-voltage DC circuits, high-voltage breakdown modules and an upper computer; wherein the high-voltage DC circuit is connected with the low-voltage DC circuits through cables; the low-voltage DC circuits and the high-voltage breakdown modules simultaneously supply power to plasma generators through cables; the upper computer monitors the low-voltage DC circuits in real time; and the same power source comprises a plurality of low-voltage DC circuits and high-voltage breakdown modules.

Multi-path combined high-low voltage plasma drilling power source and drillling system

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.

Method for assessing safety integrity level of offshore oil well control equipment

The disclosure provides a method and system for milling injected cutting fluid under different working conditions. By analyzing influence of airflow fields in a milling area under different working conditions on injection of cutting fluid, an influence rule of a helical angle and a rotation speed of a cutter on the flow field is quantitatively analyzed, an optimal target distance of a nozzle, an angle between the nozzle and a milling cutter feeding direction and an angle between the nozzle and the surface of a workpiece are comprehensively determined, the nozzle is set according to a determined setting manner, and lubricating oil is sprayed to the milling area by utilizing the nozzle.

The present disclosure provides a multi-path combined high-low voltage plasma rock-breaking drill bit, drill bit apparatus and drilling method. The multi-path combined high-low voltage plasma rock-breaking drill bit comprises: a drill bit body, insulators, plasma generators, drilling fluid outlets, plasma integrated pipelines, a drilling fluid pipe; wherein a plurality of plasma generators are distributed on the same drill bit body; the axis of the plasma generator and the axis of the drill bit body form a certain included angle; each of the plasma generators is independently connected to the ground through its respective plasma integrated pipeline and operates independently; and drilling fluid flows out of the drilling fluid outlets, takes away the heat generated by the operation of the plasma generators, thereby cooling the plasma generators.

Multi-path combined high-low voltage plasma rock-breaking drill bit, drill bit apparatus and drilling method

The present disclosure belongs to the field of petroleum engineering, in particular to a fully-electrically driven downhole safety valve. The fully-electrically driven downhole safety valve comprises a downhole safety valve mechanism and a downhole safety valve control system; wherein the downhole safety valve mechanism includes an electronic cabin module, a transmission control module, a motion conversion module, a magnetic coupling and spring module. and a valve module; the downhole safety valve control system includes a downhole comprehensive unit and an uphole comprehensive unit.

Fully-electrically driven downhole safety valve

A sand control screen pipe includes couplings, movable spacer bushes, an outer movable radial slotted screen pipe, a split supporting ring and an inner axial slotted screen pipe. In downhole sand control construction work, a movable combined sand control pipe of axial and radial slotted screen pipes is required to be aligned with an oil layer position, this sand control screen pipe adopts the outer radial slotted screen pipe and the inner axial slotted screen pipe for blocking sand, and the outer radial slotted screen pipe can carry out limited axial movement along the inner axial slotted screen pipe and free rotational motion around the axial line of the inner axial slotted screen pipe, so that the controlled sand can be effectively prevented from hardening and an oil leakage channel is kept smooth for a long time to improve the production efficiency of an oil well.

Movable combined sand control pipe of axial and radial slotted screen pipes

Growing community of inventors

Qingdao, China

Yonghong Liu