Продукция и операции

Product and operations

Nitrogen pumping unit   AP-II

THIS NITROGEN PUMPING UNIT IS MOUNTED ON A TRAILER AND CONSISTS OF THREE MAIN COMPONENTS; STORAGE TANK, PUMPING SYSTEM AND HEATER (VAPORIZER).

Liquid nitrogen is stored in a special pressure vessel at -1950 C. (-3200 F.). The vessel is actually no more than a large twin shelled "thermos bottle. The inner tank is a stainless steel pressure vessel which holds the liquidnitrogen. While the outer steel shell provides the insulating space on which a near vacuum is drawn. Approximately 8" of special "perlite" insulation and polished inner surfaces further help reduce radiant heat transfer. Liquidnitrogen in storage does loose a small percentage of product continuously to vaporization, but can be stored for an extended number of weeks with minimal product loss. Liquid nitrogen from the tank flows to a "boost pump"through stainless steel pipes. This boost pump is a hydraulic centrifugal pump with cryogenic liquid handling capabilities. The boost pump raises the pressure of the liquid nitrogen up to 827 kPa (120 PSI). The nitrogen at 827 kPa (120 PSI) is then fed to a high pressure cryogenic pump. This pump is a positive displacement "Triplex" pump that can deliver pressures up to 10,000 PSI (70 mpa). The "Triplex" pump raises the pressure of the liquid nitrogen up to required working pressures. From the high pressure pump the liquid nitrogen is forced through a series of stainless steel coils which are heated by hot air from a diesel burner. The liquid nitrogen in these coils absorbs heat and is gasified. This gaseous nitrogen at 100 - 650 C. (500 – 1500 F.) is the final product which flows down the line for its various service applications.

APPLICATIONS OF NITROGEN PUMPING UNIT   AP-II

CIDIZING AND FRACTURING:

N2 added to fluids promotes flow back without swabbing. Quicker return to production, better clean-up, improved productivity will result. 

DRY SHOOTING:

N2 displacement of well fluids prior to perforating eliminates swabbing, prevents formation contamination and reduces rig time. 

HYDRAULIC PERFORATING:

N2 gives up to 300 percent increase in penetration, results in greater well production and reduces the need, in some cases, for stimulation.

KICKING A WELL IN:

For completion, swabbing is eliminated, and rig time is reduced when the well is brought in by circulation with N2 gas. 

OPERATING TOOLS AND PACKERS:

Use of N2 eliminates failures during setting ef inflatable packer, prevents dilution orcontaminationofformation fluids. 

CORROSION INHIBITION:

N2 greatly increases speed of treatment, provides uniform inhibitor contact, eliminates swabbing. 

DRILL STEM TESTING:

N2 eliminates sample contamination and reduces packer failures during drill stem testing, providing a true sample of reservoir fluids. 

GASEOUS DRILLING:

N2 drilling eliminates danger of downhole explosions, and reduces compression requirements.

COMBATTING LOST CIRCULATION:      

N2 quickly reduces mud column weight yet gives easy removal of gas when mud weight needs to be restored. In related industries to the oilfield, nitrogen is seeing increasing application in natural gas plants, refineries and pipelines. 

 PURGING:

 Inert N 2. used for purging of vessels and pipelines eliminates internal explosion hazard during start ups or facility repairs. 

PRESSURE TESTING:       

 N2 provides a quick, dry test without internal explosion hazard, and with no test fluids left in lines or vessels. 

NITROGEN PUMPING UNIT

 
Manufacturer CANADIAN FRACMASTER LTD.
Model Trailer mounted nitrogen unit 055

Serial number

 

CFM 01988001

Year of production    

1988.

Weight with liquid nitrogen

23 810 Kg

Weight without liquid nitrogen

15 350 Kg

 

TRAILER  

Manufacturer    

FRUEHAUF

Serial number

2H8V03629KT000101

Number of axles

two
Number of tires eight + one

Dimension of tires

11 X R22.5

Pressure in tires

700 Kpa

 

NITROGEN PUMING UNIT CAPACITY  

Volume of gaseous nitrogen for cold end ID 2"  

15 300 Sm 3 /h  on 686 bar

Volume of gaseous nitrogen for cold end ID 2.5"  

9 300 Sm 3 /h  on 535 bar