SU1601350A1 - Equipment for operating well - Google Patents

Abstract

This invention relates to the petroleum industry. The purpose of the invention is to increase the reliability of operation by ensuring a stable supply of the reagent to the sub-packer space while ensuring the removal of gas from under the packer. The equipment contains a packer 4 dividing the annular space into two parts A and B. Part B forms a container for reagent 5, which through tube 6 is continuously supplied from nadpaknernogo space A into the sub-packer space B. The tube 6 is placed in the vapor pipe 7, blocked in the upper part of the valve 8. When the gas pressure in part A is increased, the valve 8 opens and the gas enters part B. The pressure at the inlet 10 of the tube 6 is always greater than the pressure in the podpacker space A by an amount depending on the density of the reagent and the distance between the valve 8 and the inlet 10 of the tube 6, which ensures a stable supply of the reagent in the sub-packer space A. 2 Il.

Description

The invention relates to the oil industry, namely to equipment for oil production.

The purpose of the invention is to increase the reliability of operation by providing a stable supply of reagent to the sub-well space of the well while ensuring the removal of gas from under the packer.

FIG. 1 shows a diagram of the equipment located in the well; FIG. 2 - reagent dispenser mounted on a packer placed on a tubing string.

The equipment contains pumped-tubing (tubing) 1 pump 2, annulus between tubing and column, casing 3 is divided by packer k into two parts A and B. The top part B of annulus forms a container filled with reagent 5. Packer i is made with a reagent dispenser in the form of a tube 6 for bypassing agent 5 from the above-packer space B to the sub-packer space A. On the packer, a gas outlet tube 7 is installed, blocked in the upper part by the valve 8 and intended for venting gas from the subpacker The nuclear space A in the supra-packer space B. The exhaust pipe 7 is fastened to the tubing string with the help of a collar 9. The tube 6 is placed inside the exhaust pipe 7 so that the inlet 10 is located below the valve 8;

Equipment works as follows

in a way.

After the descent of the tubing string 1 and the landing of the packer 4, the annular space B above the packer 4 is filled with reagent 5, for example, an inhibitor. The inhibitor, entering through the inlet 10, enters the tube, through which it stably enters the sub-plunger space A and mixes with the production of the well. Vent tube 7 is designed to remove gas from under the packer space. During operation, gas accumulates in subpacker space A. The pressure in the subpacker space A is equal to the hydrostatic pressure in the above packer space B. When there is an imbalance, i.e. when pressure is increased in the sub-pacherno space A, valve 8 opens

and the gas is passed into the supra-packer space. At the same time, gas always flows through valve 8, since the pressure at the level of the inlet 10 of tube 6 is always greater than the pressure at the level of the valve by the amount LR, depending on the density and reagent 5 and the distance between the valve 8 and the inlet 10.

Thus, gas accumulated in the annulus and interfering with the normal operation of a submersible pump, as well as a stable dosage of chemicals, is used as an auxiliary element.

The required dosage can be adjusted by the diameter of the hole in the dosing tube and the concentration of the aqueous solution of the reagent.

Example. For a well with a flow rate of 60 tons / day, at a dosage of the 6th aqueous solution, taking into account (10-12) 11 g of ammophos per ton of extracted water, a flow rate of 11 l / day of reagent is required.

If we consider that the length of the exhaust pipe is 5 m and the required amount of the reagent is 11 l / day, then

de F is the hole area,

Q - reagent consumption, l / day H- - the height of the liquid column is equal to the length of the vapor pipe

(W), cm;

g is the coefficient of free fall;

Q4 / M - coefficient -1. -(with.

Q actual consumption, l / day, Q - theoretical consumption, l / day;

F 0,001286 F 1

Bore diameter d

- 0 mm.

Taking into account that the volume of the annular space between pump-compressor pipes with an outer diameter of 73 mm and production pipes with an internal diameter of 150 mm is 1 l, then when the device goes down to a depth of 60 m, the content will be l, and this volume will be more than

2.5 months ensure stable dosage.

Claims (1)

Invention Formula Equipment for well operation, containing a downhole pump located inside the tubing string, mounted on the tubing string with the possibility of blocking the annular tube; Space, packer with a reagent dispenser, having a container formed by casing strings and ten A container into a sub-packer well space installed in a packer is characterized in that, in order to increase reliability by providing a stable supply of reagent to the sub-packer well space while simultaneously ensuring the gas is drained from under the packer, it is equipped with a gas outlet tube installed on the packer in the upper part of the valve, and the tube is installed in the vapor pipe, while the inlet of the tube   PPV GCHH L IVI ill 14r tf if- f-vif t, mf, r ....., .-- ".-.-- 1 tubing and packer, J5 is located below the vapor valve and tube to bypass the reagent from the tube. 01350 ten the container into the sub-packer well space installed in the packer, characterized in that, in order to increase reliability by ensuring stable supply of reagent to the sub-packer well space while simultaneously ensuring the gas outlet from under the packer, it is equipped with a gas outlet tube installed on the packer in the upper part of the valve, and the tube is installed in the vapor pipe, while the inlet of the tube ..,.--".-.--one J5 is located below the vent valve. Fig 2