SU1355830A1 - Method of preparing high-thickened oils for pipeline transportation - Google Patents

Abstract

The invention relates to the oil industry, in particular to the preparation of high-falling oils for pipeline transport. The aim of the invention is to increase the efficiency of the oil preparation process due to removal of sediment of the solid phase of paraffin particles. With the addition of depressant reagents to oil and its heat treatment, paraffin crystals are formed in the oil. These aggregates, which are able to precipitate under the influence of gravity, are removed from the oil after sludge. The remaining liquid phase has a lower pour point. 1 tab. i (L 00 ate SP 00 00

Description

one

The invention relates to the oil producing industry, in particular to the preparation of high-melting oils for pipeline transport.

The aim of the invention is to increase the efficiency of the oil preparation process by deeply lowering its hardening temperature and improving yield at the same time by removing sediment of the solid phase of paraffin particles,

Before the heat treatment, the depressant is introduced into the oil, and after the heat treatment, the oil is sedimented, the precipitate is removed, and the liquid phase is pumped out.

In this case, it is possible to achieve the best rheological parameters of the oil, in which, after the introduction of the depressor and heat treatment, the pour point has not sufficiently decreased in cases with high paraffin content in the oil.

The method of preparing the high curing oil for pipeline transport is as follows. With the addition of depressant reagents to oil and its heat treatment, aggregates of paraffin crystals are formed in a greft. These aggregates are able to precipitate under the force of gravity. The deposition rate of particles can be determined by the formula of Strks: V gd (-1): 18V,

- acceleration of body strength;

-diameter particles;

- respectively, the density of the solid and liquid phases;

viscosity of the medium.

If the solid phase is removed from the liquid, its freezing point will drop quite significantly. The effect is the higher, the higher the paraffin content in the oil,

For this purpose, the high hardening oil after the introduction of dewaxing agents and heat treatment must be subjected to settling, after which the sediment is removed from the oil. The remaining liquid acquires new properties — a lower pour point.

Pipeline transportation of such oil is greatly facilitated.

The precipitate, which is the solid phase of paraffin particles, is sent to the accumulator. Here the precipitate is decanted and becomes relative to g d P. and P

V

558302.

but resistant to TOHKoi-iy dispersing. It can be periodically discharged or even continuously pumped out in small portions into the pipeline in the form of a coarse suspension.

Example. The Komsomolskoye oil has a density of 0.795 and a pour point of 30 ° C. In view of the low productivity of oil production from the field (150-200 t / s), direct heating is inefficient. The heat treatment of the oil is practically impossible. Depressors on

t5 oil have insufficient effect

In Komsomolsk oil, the depressant P-70 {paraffin 70) was in the amount of 0.25% and heat treatment was performed at 60 ° C, Sludge was produced

with weak stirring (V 5 cm / s,. Re 0.02) ,. After oil has cooled down, a residue is removed from it. The results are shown in the table.

Claims (1)

25 The described technology makes it possible to significantly deepen the depression of the freezing point of oil. At the same time, the effect is the higher, the more fully Shdkost is freed from weighing solid phase in it, centrifugation, and the like. The method of preparing high-hardening oils to the pipeline port 35 by heat treatment and the introduction of depressant reagents, characterized in that, in order to ensure the efficiency of the process, the depressant is introduced into the oil before heat treatment, and after heat treatment the oil is subjected to sludge is drained and the liquid phase is pumped out. Pour point GOST-20287- 74 C Komsomolskoye oil Oil is heat treatable thirty 29 Oil + 0.25% P-70, heat treated Same when removing sediment 20