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公开(公告)号：US12186856B1
公开(公告)日：2025-01-07
申请号：US18628733
申请日：2024-04-07
Applicant: CHENGDU UNIVERSITY OF TECHNOLOGY
Inventor： Tao Ren , Qingyou Liu , Gang Jiang , Yujia Li , Zheng Jiang , Yachuan You , Lin Xian
Abstract: The present disclosure provides a grinding robot for an inside wall of a small diameter pipe. The grinding robot includes a grinding device, a transmission device, and a driving device. By arranging the grinding robot into the above three portions, the overall bending pipe passability of the robot can be increased, which is convenient for the grinding robot to grind the small diameter pipe. A first gimbal and two second gimbals provided in the transmission device enable the grinding robot to flexibly pass through bends of the pipe, and enable a grinding driving force to be variably transmitted to the grinding device. When the grinding body rotates and contacts a pipe wall, a reaction force of the pipe wall on the grinding body is balanced by an adjusting spring adjustment force in a balance adjusting device and a self-weight of a grinding body.
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2.发明授权公开(公告)号：US11572767B2
公开(公告)日：2023-02-07
申请号：US16503471
申请日：2019-07-04
Applicant: CHENGDU UNIVERSITY OF TECHNOLOGY
Inventor： Qingyou Liu , Haiyan Zhu
Abstract: A design method for a personalized drill bit for a complex difficult-to-drill formation includes: S1, acquiring rock drillability indexes of a drilled formation; S2, performing digital simulation analysis of rock breaking of bit teeth and a composite rock breaking experiment of a ring gear and a drill bit, and establishing a mechanical model of the rock interaction at the bottom of a well; S3, establishing an integrated dynamics model of drill string-drill bit-rock system coupling; S4, designing a tooth shape, a tooth distribution density, a crown shape and a gauge protection structure for rock mechanics properties of a complex difficult-to-drill formation; S5, optimizing bit nozzle and hydraulic structure parameters by using the computational fluid dynamics theory and the numerical simulation method; S6. optimizing a manufacturing process of the drill bit by using the tooth material decarburization strengthening technology, the high-strength bit body material technology and the special tooth-shaped tooth technology.
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公开(公告)号：US10690281B2
公开(公告)日：2020-06-23
申请号：US16062117
申请日：2016-07-18
Inventor： Qingyou Liu , Haiyan Zhu , Xu Luo , Guorong Wang
Abstract: A pipeline robot capable of steering actively comprises at least two driving knuckles and at least one steering knuckle. Every two adjacent driving knuckles are connected by the steering knuckle. A front end cover is fixed on the front end surface of the driving knuckle at the most front end. A sensor is mounted in the center of the front end cover. A rear end cover is fixed on the rear end surface of the driving knuckle at the rearmost end. A universal spherical hinge is arranged in the center of the rear end cover. Each driving knuckle comprises a main frame, driving mechanisms and telescopic mechanisms; the telescopic mechanisms are mounted in the main frame, and capable of causing contraction of the driving mechanisms into the main frame. The steering knuckle can drive the front driving knuckle connected thereto to steer.
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公开(公告)号：US12264544B2
公开(公告)日：2025-04-01
申请号：US18508923
申请日：2023-11-14
Applicant: Chengdu University of Technology
Inventor： Jianguo Zhao , Qingyou Liu , Haiyan Zhu , Min Wan , Guorong Wang , Xuecheng Dong , Xu Luo , Yingju Pei , Xingming Wang
Abstract: A downhole traction system includes a driving system and a downhole wheeled tractor. The driving system is connected with the downhole wheeled tractor; the downhole wheeled tractor comprises a tractor body, a power unit and a plurality of traction units; the plurality of traction units are arranged along the extension direction of the tractor body; each of the traction units comprises a driving arm, a supporting arm, a supporting wheel, a driving assembly and a supporting assembly; the driving arm and the supporting arm are movably connected with the tractor body; and the supporting wheel is connected with the driving arm and the supporting arm. When the supporting assembly drives the supporting arm to extend along the radial direction of the tractor body under the hydraulic drive action of the hydraulic power unit, the supporting wheel can be abutted against the well wall.
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公开(公告)号：US12110794B2
公开(公告)日：2024-10-08
申请号：US18463876
申请日：2023-09-08
Applicant: Chengdu University of Technology
Inventor： Qingyou Liu , Jianguo Zhao , Guorong Wang , Haiyan Zhu , Xuecheng Dong , Xingming Wang , Xu Luo , Yingju Pei , Xianwei Dai
CPC classification number: E21B7/067 , E21B17/042 , E21B31/00 , E21B34/066 , E21B47/06 , E21B47/13
Abstract: Provided is a two-stage reverse-torque bent screw orientation tool. An existing bent screw orientation technology has the technical problems of large friction resistance, difficult control of a borehole track, a low drilling speed and the like, and restricts economic, safe and long-acting development of oil and gas. In order to solve the above problems, the two-stage reverse-torque bent screw orientation tool is invented and composed of a first-stage clutch mechanism and a second-stage clutch mechanism, and the first-stage clutch mechanism and the second-stage clutch mechanism are both composed of a battery, a battery compartment, a pressure sensor, an electromagnetic valve, a body, a plug, a piston, an outer tooth cylinder, an inner tooth cylinder, a transmission cylinder, a connecting cylinder, a bearing, a limiting cylinder, a lower joint, a thrust bearing, a battery compartment, a circuit board, a cover plate and the like.
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Patent Agency Ranking
6.发明授权公开(公告)号：US11668148B1
公开(公告)日：2023-06-06
申请号：US17983826
申请日：2022-11-09
Applicant: Chengdu University of Technology
Inventor： Xuelian Dong , Haiyan Zhu , Qiaozhu Wang , Jingran Tang , Qingyou Liu , Xingming Wang , Linfeng Sun
IPC: E21B23/00 , E21B23/04 , E21B17/07 , E21B43/263
CPC classification number: E21B23/001 , E21B17/073 , E21B23/042 , E21B23/0411 , E21B23/0412 , E21B43/263
Abstract: The present invention relates to the technical field of development of underground resources such as petroleum, natural gas, geothermal energy, etc., in particular to a downhole explosion robot based on planetary roller screw telescoping and traction method thereof. The present invention provides a downhole explosion robot based on planetary roller screw telescoping and traction method thereof, comprising a rear joint, a rear main body, a telescopic sub, a front main body, and a front joint, and the rear main body is provided with a rear control sub and a rear support sub; the front main body is provided with a front support sub and a front control sub, and the telescopic sub is respectively connected with the rear support sub and the front support sub. The invention has the advantages of reliability and stability, with less impact on the tube string, and can be applicable to smaller wellbore.
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公开(公告)号：US11567233B2
公开(公告)日：2023-01-31
申请号：US16516261
申请日：2019-07-19
Applicant: CHENGDU UNIVERSITY OF TECHNOLOGY
Inventor： Haiyan Zhu , Qingyou Liu , Yapu Zhao , Yang Li
Abstract: A numerical simulation and parameter optimization method for volumetric fracturing of an unconventional dual medium reservoir includes the following steps: based on the theory of dual-medium pore elasticity, in consideration of the friction effect between fractures, developing a viscoelastic-plastic damage model of hydraulic fractures based on explicit time integral; simulating random intersection and bifurcation of hydraulic fractures encountering with natural fractures by adopting a method of embedding zero-thickness fracture units in the inner boundaries of computational model grids, and establishing a mathematical model of hydraulic fracture expansion of volumetric fracturing in the unconventional dual-medium reservoir; compiling a finite element program for complex multi-fracture fracturing and competitive expansion during volumetric fracturing of the unconventional reservoir, and establishing a hydraulic fracturing finite element model of a casing-cement ring-perforation hole in cluster-reservoir matrix containing natural fractures.
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8.发明授权公开(公告)号：US12297705B1
公开(公告)日：2025-05-13
申请号：US18939678
申请日：2024-11-07
Applicant: Chengdu University of Technology
Inventor： Xingming Wang , Qiaozhu Wang , Qingyou Liu , Haiyan Zhu , Xuelian Dong , Yuanyuan Yang , Jingran Tang , Luqing Li
Abstract: The present invention discloses a support mechanism of a self-adaptive traction robot for a complex wellbore and a control method thereof, and relates to the technical field of oil and gas field development. Each support link assembly in a support mechanism is controlled by an independent hydraulic cylinder and hydraulic valve. When a well wall that each support link assembly contacts in a circumferential direction is irregular, the support mechanism contact effect is not ideal, which leads to a decrease in traction force. In this case, a displacement sensor in a telescopic mechanism detects that a displacement of a traction cylinder piston is small, which is fed back to a ground control system, and then a fluid inflow size of support cylinders corresponding to different support link assemblies is adjusted until the displacement sensor in the telescopic mechanism detects an effective traction distance.
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公开(公告)号：US11255745B2
公开(公告)日：2022-02-22
申请号：US16982439
申请日：2019-04-26
Inventor： Jun Liu , Xiaoqiang Guo , Qingyou Liu , Yufa He , Anchao Wei , Linlin Zeng , Jianxun Wang
IPC: G01M7/02
Abstract: The present invention discloses a testing device and method for simulating longitudinal-transverse-torsional coupled nonlinear vibration of a drill string in deep-water riser-free drilling. The testing device comprises a pool (1), a motor (2) and a hook load adjustment device (3), wherein a guide wheel (4) is provided on the top of the pool (1); a support seat A (5) and a support seat B (6) are fixed on the bottom surface of the pool (1); an organic glass tube (8) is fixed between the support seat A (5) and the support seat B (6); a casing (9) is respectively provided on the top surface of the support seat B (6) and the top surface of the trailer (7); the left end of the plastic tube (10) extends into the organic glass tube (8) along the axis of the organic glass tube (8). The present invention further discloses a simulation method. The present invention has the following beneficial effects: the structure is compact; the longitudinal-transverse-torsion coupled vibration responses of the drill string under different rotating speeds of the drill string, ocean flow rates, flow rates of the drilling fluid, torsional excitations and longitudinal excitations at the bottom of the formation section is simulated, thereby filling up the blank in the riser-free drilling system.
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公开(公告)号：US11047183B2
公开(公告)日：2021-06-29
申请号：US16511004
申请日：2019-07-15
Applicant: CHENGDU UNIVERSITY OF TECHNOLOGY
Inventor： Qingyou Liu , Haiyan Zhu , Jianguo Zhao , Guorong Wang
Abstract: A coiled tubing drilling robot, a robot system and a process parameter control method thereof. The coiled tubing drilling robot is mainly characterized in that a drilling pressure and a drilling speed of a drill string are adjusted by an electric proportional relief valve and an electric proportional flow valve disposed inside the drilling robot; a support mechanism of the drilling robot adopts a single oblique block to prop against a spring piece to clamp a well wall; the coiled tubing drilling robot system consists of a coiled tubing intelligent drilling rig, a wellhead device, a coiled tubing, a drilling robot, a drill string vibration measurement device, a MWD, a power drill and a drill bit.
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