Device for dosed supply of a chemical reagent into the well

 

(57) Abstract:

The invention relates to the suppression of scaling in wells and can be used in the oil industry for oil extraction. Device for dosed supply of a chemical reagent into the well contains a dispenser, a container, a discharge line, a column of hollow rods, check valve and drive submersible pump. The dispenser is located on the side surface of the housing can be moved along the body. The dispenser may be made in the form of a vane pump. The kinematic connection of the pump drive shaft gear is made independent, in the form of V-belt transmission. The discharge line is made in the form of a rigid hose. Hydraulic connection of the column of hollow rods and dosing is carried out by the inverter movement, which consists of two parts, upper and fixed lower movable performing a rotational movement. Simplified design, reduced maintenance costs of wells. 3 C.p. f-crystals, 1 Il.

The invention relates to mechanical engineering, in particular to devices dosed supply of a chemical reagent, and can be used in the oil industry for oil production.

F the t RF N 2059112, CL F 04 B 47/02, CL F 04 C 29/00, publ. in B. I. N 12, 1996).

The disadvantage of this drive is that during the production of complicated oil deposits occur (hydrates, waxes, salts, and so on) in the Elevator column, reducing the annular gap, thereby making it difficult to process oil and creating an emergency. To clean from the deposits required stopping and dismantling of equipment and flushing of the tubing string, thereby creating additional maintenance costs of wells, which leads ultimately to an increase in the cost of extracted oil.

The closest technical solution known is a device for dosed supply of the chemical reagent into the well containing the dispenser in the form of a plunger pump, a container for chemical injection line in the form of a flexible hose, a column of hollow rods, return and exhaust valves and the pump drive in the form of a walking beam pumping unit (USSR author's certificate n 1837101, CL E 21 B 37/06, publ. in B. I. N 32, 1993). The disadvantage of this device is that the flow plunger pump pulse and the efficiency of cleaning tubing reduced vsledstvii the short time of interaction of chemical Reagan the definition of the reagent, that increases the cost of oil. Supply plunger pump unregulated and depends on the frequency of rotation of the gear pumping unit. The valves provide additional hydraulic losses, which leads to increased energy consumption. The use of hollow rods in the pumping unit increases the probability of breakage, it is connected with reduction of the cross-section of the rod, which results, at peak loads, to increase voltages in excess of the allowable stress.

Technical problem on which the invention is directed, is to simplify the design, connectivity stationary discharge line with a rotating column of hollow rods and independent kinematic connection of the pump drive shaft of the gearbox to allow flow of the dispenser.

This technical problem is solved due to the fact that in the known device, containing a dispenser, a container, a discharge line in the form of a flexible hose, check valve, gearbox and drive submersible pump in the form of a walking beam pumping unit, according to the invention, to simplify the design, the dispenser is located on the side surface of the housing, with the possibility peremeshennoi pump with the shaft of the dispenser is made independent, in the form of V-belt transmission. The discharge line may be made in the form of a rigid hose. Hydraulic connection of the column of hollow rods and dosing is carried out by the transducer motion, and the motion Converter consists of two parts, upper and fixed lower movable performing a rotational movement.

This device for dosed supply of a chemical reagent into the well can simplify the design by mounting the dispenser on the side surface of the gear case and the rejection of the exhaust valve, which will reduce the hydraulic resistance and reduce energy costs. The use of plate pump as the pump dispenser allows you to adjust the supply of a chemical reagent, and its flow to make continuous, which greatly increases the efficiency of cleaning tubing string, thus reducing the number of required chemical reagent and, as a consequence, a reduction in the cost of oil production. The use of hollow rods for submersible installation with a screw pump justified, as there is a uniform rotational movement without peak loads.

The proposed device for dosed supply of chemical reor 1, the electric motor 2, the V-belt transmission 3, plastic pump 4, V-belt variator 5, tensioning the V-belt transmission 6, the motion Converter 7, a column of hollow rods 8, the container 9 for the chemical reagent and the check valve 10. Lateral side of the gear 1 made in the form of a flat surface with grooves 11, which by means of bolts mounted rotary vane pump 4. For suction and discharge of the chemical reagent is provided by lines 12 and 13.

Device for dosed supply of a chemical reagent into the well operates as follows: when connecting the electric motor 2 torque through the V-belt transmission 3 is transmitted to the input shaft of the gearbox 1, then the output shaft to the rotational string of hollow rods 8, at the same time, the torque is transmitted from the shaft gear 1 on the rotor vane pump 4 through V-belt variator 5, which allows you to adjust the flow.

During rotation of the rotor occurs a periodic change in the volume of the working chambers. Each of the cells is the induction dosing chemical reagent from the tank 9 through the suction line 12 and the displacement of the chemical reagent under pressure through the discharge line 13 in conversion on the Oia discharge 13, and the lower movable, which is attached to the string of hollow rods 8. Through the internal cavity and the check valve 10 chemical reagent enters the Elevator column pipes, where it interacts with the deposits on the tubes. Also supply regulating chemical reagent is carried out by the regulator vane pump by changing the distance between the axes of symmetry (eccentricity) of the rotor and stator of the pump.

Device for the dosed supply allows to increase reliability, increase time between repairs of wells, to reduce the energy consumption and the cost of the oil, increase the capacity and head of the screw submersible pump mounting plate pump on the side of the gearbox, in addition, allows to simplify the design of the drive, to reduce the size and increase efficiency. Rotary vane pump is made in the form of a single node, which allows for maintenance and repair regardless of the surface drive.

Sources of information

RF patent N 2059112, CL F 04 B 47/02, CL F 04 C 29/00, publ. in B. I. N 12, 1996

USSR author's certificate N 1837101, CL E 21 B 37/06, publ. in B. I. N 32, 1993 (prototype).

1. Device for dozirovanno the ski reagent and the discharge line, communicated with a column of hollow rods, valve, gearbox and drive submersible pump, wherein the dispenser is located in grooves made on the side surface of the housing to move along it, and the kinematic connection of the drive submersible pump with the shaft of the dispenser is made independent in the form of V-belt transmission, and hydraulic connection of the column of hollow rods and dispenser made by transducer movement.

2. The device under item 1, characterized in that the dispenser is made in the form of a vane pump.

3. The device under item 1, characterized in that the discharge line is made in the form of a rigid hose.

4. The device under item 1, characterized in that the transducer movement consists of two interrelated parts - the mobile and stationary.

 

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