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basic electric elements (9) 9
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earth drilling, e.g. deep drilling (9) 9
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obtaining oil, gas, water, soluble or meltable materials or aslurry of minerals from wells (9) 9
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Engineering Failure Analysis, ISSN 1350-6307, 12/2019, Volume 106, p. 104135
The solid expandable tubular technology (SETT) is a permanent radial plastic deformation of the casing, which serves to block the leaking section and subsidize... 
Expansion cone optimization | Solid expandable tubular (SET) | Plastic deformation | Failure analysis | Material preference
Journal Article
Synlett, ISSN 0936-5214, 09/2016, Volume 27, Issue 15, pp. 2251 - 2253
Abstract A batchwise, multigram preparation of 2-azabicyclo-[2.1.1]hexane hydrochloride ( 1 ·HCl) was developed, delivering a total of 195 grams of material.... 
letter | amines | alkylation | bicyclic compounds | alkyl halides | heterocycles | 2,4-METHANOPROLINE | CHEMISTRY, ORGANIC | DIVERSITY
Journal Article
01/2019
The utility model discloses a seal and separate sand washing device belongs to oil well sand washing field. The device includes: center tube, the top... 
EARTH DRILLING, e.g. DEEP DRILLING | FIXED CONSTRUCTIONS | EARTH DRILLING | OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS | MINING
Patent
04/2019
The invention provides an experimental device and an experimental method for expansion of an expansion tube. The experimental device comprises a sleeve, an... 
TESTING | INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES | MEASURING | PHYSICS
Patent
04/2019
The invention provides a double-layer oil testing string and an oil testing method. The double-layer oil testing string comprises an oil tube, a first... 
EARTH DRILLING, e.g. DEEP DRILLING | FIXED CONSTRUCTIONS | EARTH DRILLING | OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS | MINING
Patent
01/2019
The utility model discloses a perforation device belongs to oil production equipment technical field. The device includes: center tube, the top connection of... 
EARTH DRILLING, e.g. DEEP DRILLING | FIXED CONSTRUCTIONS | EARTH DRILLING | OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS | MINING
Patent
05/2018
The invention provides a small hole well cementation and sand prevention well-completion integrated pipe column. The integrated pipe column includes an outer... 
EARTH DRILLING, e.g. DEEP DRILLING | FIXED CONSTRUCTIONS | EARTH DRILLING | OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS | MINING
Patent
03/2019
The invention discloses a one-trip type stratified well testing string, and belongs to the field of oil-gas field production. The string comprises a first oil... 
EARTH DRILLING, e.g. DEEP DRILLING | FIXED CONSTRUCTIONS | EARTH DRILLING | OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS | MINING
Patent
10/2018
The invention provides an injection increasing method for water-injection development of an oil reservoir. The injection increasing method comprises the... 
EARTH DRILLING, e.g. DEEP DRILLING | FIXED CONSTRUCTIONS | EARTH DRILLING | OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS | MINING
Patent
02/2016
The invention discloses a technique for cementation of a high-pressure well. The technique includes: adjusting density of drilling fluid, and... 
EARTH DRILLING, e.g. DEEP DRILLING | FIXED CONSTRUCTIONS | EARTH DRILLING | OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS | MINING
Patent
01/2016
The invention relates to the technical field of oil field development, in particular to a well cementation sliding sleeve type sectional-fracturing well... 
EARTH DRILLING, e.g. DEEP DRILLING | FIXED CONSTRUCTIONS | EARTH DRILLING | OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS | MINING
Patent
03/2013
The utility model discloses a battery cell, which comprises a positive plate, a diaphragm and a negative plate that are stacked and then wound together,... 
BASIC ELECTRIC ELEMENTS | ELECTRICITY | PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Patent
01/2013
A sealing ring comprises a cylindrical ring body and a step. The ring body contracts towards an opening of the ring body and then retracts to the outer side.... 
BASIC ELECTRIC ELEMENTS | ELECTRICITY | PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Patent
04/2011
The utility model discloses a battery cell for a cylindrical nickel-metal hydride battery. An insulating pad is pasted to the bottom of the battery cell so... 
BASIC ELECTRIC ELEMENTS | ELECTRICITY | PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Patent
03/2012
The invention relates to a battery and a steel shell of the battery. The steel shell of the battery is used for containing a plurality of short pole groups of... 
BASIC ELECTRIC ELEMENTS | ELECTRICITY | PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Patent
11/2010
The utility model discloses a cylindrical secondary battery and a positive electrode plate thereof, wherein the positive electrode plate is in a cuboid... 
BASIC ELECTRIC ELEMENTS | ELECTRICITY | PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Patent
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