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公开(公告)号：US20240093599A1
公开(公告)日：2024-03-21
申请号：US18521195
申请日：2023-11-28
Inventor： Guangjie YUAN , Jingcui LI , Yan XIA , Jifang WAN , Gentai JIN , Guotao LI , Hong ZHANG , Tianen LIU , Pan FU , Yuhan PANG
IPC: E21B47/117 , E21B21/08 , E21B47/103
CPC classification number: E21B47/117 , E21B21/08 , E21B47/103
Abstract: A lost circulation detection device includes a first detection member and a second detection member, a first signal transmitter and a first signal receiver are disposed on the first detection member, and the first signal transmitter transmits a signal along an axial direction of a rockshaft so that the first signal receiver acquires data information of drilling fluid in the axial direction of the rockshaft; a fluid channel penetrating through the second detection member is disposed in the second detection member, and the fluid channel is configurable to be in communication with the rockshaft; a second signal transmitter and a second signal receiver are disposed oppositely on two sides of the fluid channel, and the second signal transmitter transmits a signal along a center line of a second accommodating groove, so that the second signal receiver acquires data information of drilling fluid in a circumferential direction of the rockshaft.
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公开(公告)号：US11618844B2
公开(公告)日：2023-04-04
申请号：US16260055
申请日：2019-01-28
Inventor： Hua Zhang , Jianzhou Jin , Shuoqiong Liu , Fengzhong Qi , Yongjin Yu , Ming Xu , Jinping Yuan , Zhiwei Ding , Chongfeng Zhou , Chi Zhang , Zishuai Liu , Yusi Feng , Yuchao Guo
IPC: C04B14/04 , C04B14/06 , C04B14/34 , C04B24/00 , C04B24/16 , C04B28/04 , C09K8/48 , C09K8/487 , C09K8/467 , C04B103/00 , C04B111/76 , C04B103/20 , C04B103/40 , C04B103/46 , C04B103/50
Abstract: The invention provides a high temperature resistant Portland cement slurry and a production method thereof. The high temperature resistant Portland cement slurry comprises the following components by weight: 100 parts of an oil well Portland cement, 60-85 parts of a high temperature reinforcing material, 68-80 parts of fresh water, 1-200 parts of a density adjuster, 0.1-1.5 parts of a suspension stabilizer, 0.8-1.5 parts of a dispersant, 3-4 parts of a fluid loss agent, 0-3 parts of a retarder and 0.2-0.8 part of a defoamer. The high temperature resistant Portland cement slurry has a good sedimentation stability at normal temperature, and develops strength rapidly at a low temperature. The compressive strength is up to 40 MPa or more at a high temperature of 350° C., and the long-term high-temperature compressive strength develops stably without degradation. Therefore, it can meet the requirements for field application in heavy oil thermal recovery wells, reaching the level of Grade G Portland cement for cementing oil and gas wells.
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公开(公告)号：US20200332629A1
公开(公告)日：2020-10-22
申请号：US16389188
申请日：2019-04-19
Inventor： Quanli Zhang , Hongwei Yin , Wanjun Li , Huijuan Guo , Guojun Liu , Binggui Xu , Gang Chen , Yingjie Zhu , Gang Wang , Shaohua Zhou , Zhitong Liu , Yongliang Yu , Mingmin He , Tao Jia , Jianli Wang , Mingjie Lv , Fei He
Abstract: The present invention discloses an expandable liner hanger system comprising a central pipe and an expandable pipe, with an expansion cone provided therebetween the central pipe and expandable pipe in a way that the expansion cone is movable along the central pipe, so that the expandable pipe is expanded; wherein, the expansion cone comprises an expansion cone seat move along the central pipe, and an expansion cone sleeve fitted over the expansion cone seat, the connection between the expansion cone seat and the expansion cone sleeve is configured in a way that the expansion cone sleeve can move upward together with the expansion cone seat along the central pipe so that the expandable pipe is expanded, and the central pipe can drive the expansion cone seat to disengage from the expansion cone sleeve.
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公开(公告)号：US10745605B2
公开(公告)日：2020-08-18
申请号：US16196399
申请日：2018-11-20
Applicant: CNPC Engineering Technology R&D Company Limited , China University of Petroleum (East China)
Inventor： Yuping Yang , Jingping Liu , Long Li , Dongyang Li , Wei Zhang , Lei Guo , Lulu Li
IPC: E21B21/00 , C09K8/24 , C01B32/194 , C08F226/04 , E21B21/06 , B82Y30/00 , B82Y40/00
Abstract: The present invention relates to the technical field of well drilling, and discloses a plugging agent for temperature-resistant calcium-resistant water-based drilling fluid used in oil and gas reservoir protection, a drilling fluid, and uses of the plugging agent and the drilling fluid. The plugging agent for temperature-resistant calcium-resistant water-based drilling fluid used in oil and gas reservoir protection contains acrylamide-diallyldimethylammonium chloride copolymer modified graphene, wherein in the acrylamide-diallyldimethylammonium chloride copolymer, a molar ratio of structural units provided by acrylamide to structural units provided by diallyldimethylammonium chloride is 1:5-15, and the number-average molecular weight of the acrylamide-diallyldimethylammonium chloride copolymer is 15,000-30,000. The water-based drilling fluid described in the present invention is especially applicable to well drilling in deep salt-gypsum formations, and can exhibit good filtrate reducing, plugging, temperature-resistant, anti-collapsing, and reservoir protection performance.
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公开(公告)号：US20250027370A1
公开(公告)日：2025-01-23
申请号：US18907064
申请日：2024-10-04
Inventor： Wang LIN , Dong WU , Hongzhi XUE , Weixing ZHU
IPC: E21B7/06 , E21B47/022 , E21B47/026
Abstract: A geosteering method and apparatus, and a storage medium, where the method includes: acquiring first well trajectory information of a target well, and first geological information and second geological information of the target well; determining, by using a plane where a first well trajectory is located as a steering profile, a geological structure line of a first class geological layer corresponding to the first geological information on the steering profile, and determining, by using the geological structure line of the first class geological layer as a reference and based on the second geological information, a geological structure line of a second class geological layer corresponding to the second geological information on the steering profile, so as to obtain a geosteering model of the target well; and using the geosteering model to perform geosteering on actual drilling of the target well.
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Patent Agency Ranking
26.发明公开公开(公告)号：US20230365853A1
公开(公告)日：2023-11-16
申请号：US18354616
申请日：2023-07-18
Inventor： Jie ZHANG , Rongchao CHENG , Jie FENG , Zhiliang ZHAO , Shuangwei WANG , Long LI , Tianyi ZHANG
CPC classification number: C09K8/5083 , C09K8/426 , C09K8/035
Abstract: Provided in the present invention are a pH-responsive nano-gel plugging material, and a preparation method therefor and the use thereof. The pH-responsive nano-gel plugging material comprises the following raw materials in parts by mass: 50-70 parts of water, 2-3 parts of an emulsifier, 25-35 parts of an acrylic terpolymer, 10-15 parts of a polyalcohol compound, and 10-20 parts of a vinyl pyridine compound. The pH-responsive nano-gel plugging material can be applied to the plugging of Ordovician carbonate rock fractures and micro-karst cave strata, and can automatically identify Ordovician carbonate rock fractures and micro-karst cave leaking layers and realize effective blocking thereof.
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公开(公告)号：US20210301643A1
公开(公告)日：2021-09-30
申请号：US17202584
申请日：2021-03-16
Inventor： Guodong JI , Haige WANG , Meng CUI , Zhao MENG , Qiang WU , Li LIU , Jiawei ZHANG , Changchang CHEN , Liu CUI , Jing YU
IPC: E21B45/00 , E21B12/02 , E21B10/567 , E21B49/00
Abstract: A method for evaluating a downhole working condition of a PDC bit includes: performing an indoor test, including performing a drilling test in different full-sized cores by using the PDC bit with different degrees of abrasion and balling under condition of given WOB and rotational speed, to acquire change characteristics of a WOB, a rotational speed, a torque, a ROP and a bit vibration of the PDC bit in different time domains; improving and perfecting an existing prediction model and evaluation method for the downhole working condition through data obtained by the test to obtain the method; reading parameters of the WOB, the rotational speed, the torque and the ROP in real time during drilling; determining the downhole working condition of the PDC bit by using the method in the improving and perfecting.
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公开(公告)号：US11053424B2
公开(公告)日：2021-07-06
申请号：US16196511
申请日：2018-11-20
Applicant: CNPC Engineering Technology R&D Company Limited , China University of Petroleum (East China)
Inventor： Yuping Yang , Jingping Liu , Min Chang , Long Li , Jinhong Wang , Yan Zhang , Jinsheng Sun
IPC: C09K8/24 , C01B32/194 , C01B32/198 , C08F220/58 , C08F226/04 , E21B21/00 , E21B21/06 , B82Y30/00 , B82Y40/00
Abstract: A temperature-resistant calcium-resistant water-based drilling fluid for oil and gas reservoir protection and a use thereof is provided. The water-based drilling fluid contains a filtrate reducer and a plugging agent, wherein the filtrate reducer is a copolymer that contains structural units represented by formula (1), structural units represented by formula (2), and structural units represented by formula (3), wherein, the mass ratio of the structural units represented by formula (1) to the structural units represented by formula (2) to the structural units represented by formula (3) is (0.1-0.2):1:(0.05-0.1), and the number-average molecular weight of the copolymer is 10,000-100,000, the plugging agent is acrylamide-diallyldimethylammonium chloride copolymer modified graphene. The water-based drilling fluid described can exhibit excellent filtrate reducing, plugging, temperature-resistant, anti-collapsing, and reservoir protective performance when it is applied in well drilling in deep high-temperature wells.
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公开(公告)号：US20200115611A1
公开(公告)日：2020-04-16
申请号：US16196399
申请日：2018-11-20
Applicant: CNPC Engineering Technology R&D Company Limited , China University of Petroleum (East China)
Inventor： Yuping Yang , Jingping Liu , Long Li , Dongyang Li , Wei Zhang , Lei Guo , Lulu Li
IPC: C09K8/24 , C08F226/04 , C01B32/194 , E21B21/00 , E21B21/06
Abstract: The present invention relates to the technical field of well drilling, and discloses a plugging agent for temperature-resistant calcium-resistant water-based drilling fluid used in oil and gas reservoir protection, a drilling fluid, and uses of the plugging agent and the drilling fluid. The plugging agent for temperature-resistant calcium-resistant water-based drilling fluid used in oil and gas reservoir protection contains acrylamide-diallyldimethylammonium chloride copolymer modified graphene, wherein in the acrylamide-diallyldimethylammonium chloride copolymer, a molar ratio of structural units provided by acrylamide to structural units provided by diallyldimethylammonium chloride is 1:5-15, and the number-average molecular weight of the acrylamide-diallyldimethylammonium chloride copolymer is 15,000-30,000. The water-based drilling fluid described in the present invention is especially applicable to well drilling in deep salt-gypsum formations, and can exhibit good filtrate reducing, plugging, temperature-resistant, anti-collapsing, and reservoir protection performance.
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公开(公告)号：US20190241792A1
公开(公告)日：2019-08-08
申请号：US16260055
申请日：2019-01-28
Inventor： Hua ZHANG , Jianzhou JIN , Shuoqiong LIU , Fengzhong QI , Yongjin YU , Ming XU , Jinping YUAN , Zhiwei DING , Chongfeng ZHOU , Chi ZHANG , Zishuai LIU , Yusi FENG , Yuchao GUO
CPC classification number: C09K8/48 , C04B14/043 , C04B14/066 , C04B14/34 , C04B24/003 , C04B24/163 , C04B24/166 , C04B28/04 , C04B2103/20 , C04B2103/408 , C04B2103/46 , C04B2103/50 , C04B2201/20 , C04B2201/50 , C09K8/487
Abstract: The invention provides a high temperature resistant Portland cement slurry and a production method thereof. The high temperature resistant Portland cement slurry comprises the following components by weight: 100 parts of an oil well Portland cement, 60-85 parts of a high temperature reinforcing material, 68-80 parts of fresh water, 1-200 parts of a density adjuster, 0.1-1.5 parts of a suspension stabilizer, 0.8-1.5 parts of a dispersant, 3-4 parts of a fluid loss agent, 0-3 parts of a retarder and 0.2-0.8 part of a defoamer. The high temperature resistant Portland cement slurry has a good sedimentation stability at normal temperature, and develops strength rapidly at a low temperature. The compressive strength is up to 40 MPa or more at a high temperature of 350° C., and the long-term high-temperature compressive strength develops stably without degradation. Therefore, it can meet the requirements for field application in heavy oil thermal recovery wells, reaching the level of Grade G Portland cement for cementing oil and gas wells.
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