公开(公告)号：US09874089B2

公开(公告)日：2018-01-23

申请号：US14765287

申请日：2013-06-06

Applicant: PETROCHINA COMPANY LIMITED

Inventor： He Liu ,  Xiaohan Pei ,  Fuchao Sun ,  Lichen Zheng ,  Qinghai Yang ,  Yang Gao

IPC: E21B47/10 ,  E21B4/06 ,  E21B43/20 ,  E21B23/00

CPC classification number: E21B47/10 ,  E21B4/06 ,  E21B23/00 ,  E21B43/20

Abstract: A bridge concentric direct-reading testing and adjusting instrument, comprising a cable head connected to a pressure sensor; a supporting mechanism having a pair of supporting arms; a sliding power mechanism including a power motor, a spring, an impact hammer and a one-way clutch assembly, the impact hammer slidably connected to the power motor to be rotated along with rotation of the power motor, a lower end of the impact hammer detachably connected to the one-way clutch assembly, and the one-way clutch assembly connecting the supporting arms via a transmission assembly to control opening and closing of the supporting arms; a flowmeter; and an adjusting actuator including an adjusting motor, an adjusting connector and an adjusting arm, the adjusting arm used for adjusting a waterflooding flow rate through rotation of the adjusting arm.

公开(公告)号：US11174424B2

公开(公告)日：2021-11-16

申请号：US16691944

申请日：2019-11-22

Applicant: PetroChina Company Limited

Inventor： Bin Ding ,  Xiangfei Geng ,  Jianhui Luo ,  Yang Shi ,  Jianyong Xie ,  Bo Huang ,  Yang Gao ,  Pingmei Wang ,  Baoliang Peng

IPC: C09K8/584

Abstract: The invention discloses a core-shell structured anionic nano microemulsion system, and preparation and application thereof. The system comprises an anionic Gemini surfactant, an oil phase material, a solubilizer and water; wherein the microemulsion has a core-shell structure, with the outer shell being an anionic Gemini surfactant, and the inner core being an oil phase material. The anionic Gemini surfactant is N,N,N′,N′-dodecyl tetrasubstituted diphenyl ether sulfonate having the structural formula: The anionic nano-microemulsion system of the present invention is homogeneous and transparent, has a spherical core-shell structure, has a nanometer size (3 to 40 nm) as droplets, has a narrow particle size distribution, is not easy to agglomerate, has good stability, and has an ultra-low interfacial tension and a capability of reducing viscosity of crude oil.

公开(公告)号：US11097239B2

公开(公告)日：2021-08-24

申请号：US16691946

申请日：2019-11-22

Applicant: PetroChina Company Limited

Inventor： Bin Ding ,  Xiangfei Geng ,  Jianhui Luo ,  Yang Shi ,  Bo Huang ,  Jianyong Xie ,  Yang Gao ,  Pingmei Wang ,  Baoliang Peng

IPC: B01F17/00 ,  C09K8/60

Abstract: The invention discloses a core-shell structured non-ionic nanoemulsion system and the preparation and use thereof. The system comprises a non-ionic gemini surfactant, an oil phase material, a solubilizer, and water; wherein the microemulsion has a core-shell structure, with the outer shell being the non-ionic Gemini surfactant, and the inner core being the oil phase material. The non-ionic Gemini surfactant is di(octylphenol polyoxyethylene ether)-substituted dicarboxylic acid diphenyl ether having the structural formula: The non-ionic nanoemulsion system of the present invention is homogeneous and transparent, and has a spherical core-shell structure with nanometer-sized (3-40 nm) droplets, narrow particle size distribution, low tendency to agglomerate, good stability, and both an ultra-low interfacial tension and the ability to reduce viscosity of crude oil.

公开(公告)号：US09828831B2

公开(公告)日：2017-11-28

申请号：US14765191

申请日：2013-06-06

Applicant: PETROCHINA COMPANY LIMITED

Inventor： He Liu ,  Xiaohan Pei ,  Fuchao Sun ,  Lichen Zheng ,  Qinghai Yang ,  Yang Gao

IPC: E21B34/00 ,  E21B34/12 ,  E21B43/20 ,  E21B34/14

CPC classification number: E21B34/12 ,  E21B34/14 ,  E21B43/20 ,  E21B2034/007

Abstract: A bridge concentric continuously adjustable water regulator comprising: an outer tube; an adjusting sleeve disposed in the outer tube; a concentric valve connected below the adjusting sleeve, with a center of circle of the concentric valve being concentric to the outer tube; a water outlet which runs through a side wall of the outer tube and is connected to the concentric valve; a lower sealed section which is disposed in the outer tube and is below the concentric valve and the water outlet; and a bridge passage disposed in the side wall of the outer tube and outside the concentric valve and the lower sealed section.

公开(公告)号：US11629283B2

公开(公告)日：2023-04-18

申请号：US16691969

申请日：2019-11-22

Applicant: PetroChina Company Limited

Inventor： Xiangfei Geng ,  Bin Ding ,  Jianhui Luo ,  Bo Huang ,  Jianyong Xie ,  Pingmei Wang ,  Yang Gao ,  Baoliang Peng

IPC: E21B43/16 ,  C09K8/60 ,  C07C303/06 ,  C07C309/49

Abstract: The present invention discloses a N,N,N′,N′-tetradodecyl-substituted diphenyl ether sulfonate anionic Gemini surfactant and the synthesis method thereof. It has a structural formula of: and is prepared in a two-step reaction comprising: S1. subjecting 4,4′-diaminodiphenyl ether and bromododecane to an amine alkylation reaction to obtain N,N,N′,N′-tetradodecyl-substituted diphenyl ether; and S2. sulfonating the N,N,N′,N′-tetradodecyl-substituted diphenyl ether with concentrated sulfuric acid to produce the target product, N,N,N′,N′-tetradodecyl-substituted diphenyl ether sulfonate. The surfactant of the present invention has a high surface activity and can be synthesized with a simple procedure under mild reaction conditions, and can be easily separated and purified. The surfactant of the present invention is promising in applications for alkaline/surfactant in tertiary oil recovery, for polymer/surfactant binary compound flooding, alkaline/surfactant/polymer tertiary compound flooding, microemulsion emulsifier, and the like, and may also be compounded with common surfactants to lower the cost, thereby enabling its application in a large scale.