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1) Through artificial water injection to maintain reservoir pressure to develop oil fields.

2) Methods of inspectiong and calculating the efficiency of water injection system in Shengli Oilfield are introduced.

3) Casing damage during blowout of water injection well is common in many oil fields of China.

4) Water injection system is one of the five systems in oilfield.

5) Water injection is commonly used by and gas fields and abroad to enhance oil recovery.

6) As an important tool, injection strings ensure water injection, production and injection increasement to process smoothly.

7) Improved water injection program preparation method and advanced it for complex reservoir adaptability.

8) Through lots of orthogonal refit experiments ,[http://sentencedict.com/water injection.html] developed water injection infiltration sticks are convenient and perform satisfactorily.

9) During the process of water injection production, high injection pressure cut in mudstone should be prevented to reduce casing damage.

10) In order to improve water injection efficiency with casing leakage, Y341-114 packer and combination tubing string was used to jam leakage.

11) Narrated the application of gas - turbine drive water injection pump.

12) How to realize the reasonable injection allocation of water injection well is a difficult problem.

13) The ion concentration of at the water injection well bottom inof Jidong Oilfield has been tested.

14) The water injection well of sandstone reservoir may succeed more than production well if taking acid fracturing treatment because reducing of effect closed pressure on acid etching fracture.

15) An isotope log of water injection profile is affected by many factors, specially the string contamination.

16) A technique of concentric integrated subdivision water injection suitable for offshore field was developed.

17) With tubular polysulfone ultrafiltration membrane separation unit treating the produced sewage on the spot, the treated sewage can meet the water injection standard in low permeability oil field.

18) PME designed a touchscreen PC - control system for water injection as well as circulation for mold - temperature control.

19) A water draining switch is switched on after using, and hot water sprays from a water injection nozzle to wash the ass.

20) Water injection efficiency depends on whether the injection pressure is high or low in water injection wells.

21) At the same time, serious corrosion and scale buildup of water injection system, leak of water pipeline and high-pressure water injection equipment fault rate increase would happen.

22) The conclusion is: capillary force is in first , elastic force is in second , water-wet oil reservoir is more suitable to cyclic water injection.

23) It also has good prospects in the scope of water hold-up, pressure build-up and water injection rate measurements through tool modifications.

24) The wellhead high pressure wireline control system can conduct close-in tests without bleeding off fluid and pressure, and keeping normal subsurface water injection.

25) This paper introduces three kinds of bacteria which are the most hazardous for oilfield water injection, namely sulfate reducing bacteria, iron bacteria and saprophytic bacteria.

26) The site application shows that the method is simple, fast and with small workload, and it is a really feasible method for oilfield water injection efficiency calculation.

27) The HP-bypass system between the boiler outlet and cold reheat consists of an HP-bypass control valve, a feedwater stop valve and a water injection valve, for steam attemperation .

28) The mathematical model of imbibition production was established. The pilot test of water injection was researched.

29) Scale deposit and scale control is one of important problems in oilfield water injection.

30) The paper presents the design and realization of - saving technique in centralized control of water injection system.