SU1315656A1 - Well sucker-rod pumping unit - Google Patents

Abstract

The invention relates to a technique for oil extraction and can be used in the operation of permafrost wells, which are complicated by the formation of a pump in a UGU pump with ./4 ff H (3

Description

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pipes installations of sediments of various origins. The purpose of the invention is to improve maintainability. Nozzles 4 are located in the permafrost frozen rocks range. The piston 9 is made in the form of a glass 11 installed in the upper part of the chamber 5 with the formation of a sub-piston cavity (P) 12 filled with a substance that prevents the formation of deposits. Spring-loaded valve 8 size

The invention relates to a technique for oil production, in particular, to well pumping sump units and can be used in the operation of wells with permafrost rocks, which are complicated by the formation of deposits of various origins in the tubing that plug the annular space between the rod string. and the column of pumping pipes.

The purpose of the invention is to increase the maintainability in the conditions of formation in the column of pumping pipes of solid deposits in wells with permafrost rocks by puMem to facilitate extraction of the rod string.

FIG. 1 is a schematic representation of a well pumping unit, the general view of FIG. 2 - compensator pipe attached to the rod column; in fig. 3 - the same in case of breakage of the rod column.

The well pumping unit comprises a pump 1, columns of pump tubes 2 and rods 3, and nozzles 4 fixed to the column 3 rods, each of which is made in the form of a cylindrical chamber 5, the internal cavity 6 of which is connected to the lower part by holes 7 made in the pipe A columns 2 pumping pipes. In the cavity of the nozzle 4 installed spring-loaded valve 8, the piston 9 and the annular step 10. The nozzles 4 are located in the permafrost interval.

15656

the cheeks in the lower part of the cylindrical chamber 5 with the possibility of separating the inner P column and P 12. When the column of the rods 3 breaks, the piston 9 moves downward under the action of its weight. In this case, the elements 13 are cut off, the valve 8 is opened and the substance is expelled through the opening 7 into the inner II column. The substance contributes to the rapid separation of oil, water and gas. 3 il.

The piston 9 is made in the form of a glass 11 installed in the upper part of the cylindrical chamber 5 and the open part of the cylindrical chamber facing inwards with the formation of a sub-piston cavity 12 filled with a substance that prevents the formation of deposits when mixed with the produced fluid. Spring loaded

the valve is located in the lower part of the cylindrical chamber 5 under the annular ledge with the possibility of separating the internal cavity of the column 2 of the pump tubes and the piston cavity 12

the cylindrical chamber 5. The piston 9 is connected with the part of the column 3 of the rods located above the nozzle, and the cylindrical chamber 5 in the zone of the open part of the piston 9 is equipped with cutting elements 13. The upward movement of the piston 9 is limited by the sleeve 14. The locking element 15 of the valve 8 is spring loaded 16 which in turn is tucked in by a dead stopper

17. The deaf plug 17 is associated with

pipe 4 and part of the column 3 rods located under the pipe.

A borehole sucker pump unit operates as follows.

During the descent of the column 3 rods in

a borehole (not shown) of the part of the rod string located under the nozzle is connected to a blind plug 17, which is connected to the nozzle 4. In

the internal cavity 6 of the cylindrical chamber 5 is filled with a substance that prevents the formation of, in particular, ice deposits and carbohydrate hydrates

native gases, shear elements 13, piston 9 are installed, connected with the 4 part of the column 3 rods and the sleeve 14 placed above the nozzle. Then the nozzles 4 are lowered into the well with the expectation that they are in the permafrost interval. After descending into the well, the rod column 3 is mounted surface wellhead equipment with a pumping unit (not shown).

During the reciprocating movement of the column of 3 rods, the produced fluid enters the flow line of the well. The 4 part of the column 3 of the rods located above the nozzle is held by contacting the piston 9 with the annular step of the sleeve 14. When pumping liquid through the column 2 of the pumping sediment pipes, in particular ice and hydrocarbon gas hydrates, does not form as the temperature of the Bbmie the formation of ice and hydrate hydrocarbon gases. The presence of shear elements 13 prevents accidental, for example, under the action of the Force of friction, the movement of the piston 9 downwards.

When a column of rods 3 breaks (Fig. 3, piston 9 with a part of the rod column located above nozzle 4, moves downward under the weight of the latter, the elements 13 are cut off, and the suppressed valve 8 opens under the pressure of the substance in the piston cavity 12, created the piston 9, and the substance through the openings 7 in the nozzle 4 is forced into the internal cavity of the column 2 of the pump tubes, preventing the formation of, in particular, deposits of ice and hydrates of hydrocarbon gases, while removing the broken column 3 of the rods is facilitated.

The formation of ice and hydrates in the column 2 of the pump tubes is as follows. When the pump 1 is operated, the produced fluid containing oil, water and gas rises through the pump pipes to form the gas / oil mixture. When the well is stopped (at the break of the column of 3 rods), the oil, water and gas begin to delaminate. However, at the same time there is an intensive cooling of the liquid inside the column of pump tubes under the action of permafrost.

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The temperature decreases to ice and hydrate formation temperature. At the same time, deposits are formed, including a solid body, in the pores of which particles of oil are enclosed. To prevent this, it is necessary to inject a substance that promotes rapid separation of oil, water and gas, for example, an OP-10 type demulsifier. I

At the same time, oil and water are exfoliated, and water is in the lower part of the tubing string, and oil B is upper. At the bottom of column 2 of the pumping pipes, the temperature is higher than at the top, and exceeds the temperature of ice and hydrate formation.

Thus, the automatic introduction of a substance into the column 2 of the pumping pipes during the cutting of the columns of the 3 rods allows preserving the separation time and preventing the formation of deposits.

Claims (1)

Invention Formula. eni A well pumping unit, comprising a pump, columns of pumping pipes and rods, and nozzles mounted on a rod string, each of which is made in the form of a cylindrical chamber, the inner cavity of which is connected by holes in the nozzle to the inner cavity of the pump tube string A spring-loaded valve, a piston and an annular ledge are installed in the cavity of the nozzle, in order to increase maintainability under conditions of formation of strong deposits in the column of pumping pipes in boreholes with permafrost by facilitating recovery liquid, and the spring-loaded valve is placed in the lower part of the cylindrical chamber under the annular ledge with the possibility of separation renney cavity of the pumping pipe and the cavity podporschnevoy a cylindrical chamber, wherein the piston is associated with a part of the rod string placed above the nozzle, and odin, ri: ches chamber in the zone of the open part of the piston supplying shear elements. tpus one / V fpU8. J Editor S.Pekar Compiled by E.Ginzburg Tehred M.Hodanich Order 2333/35 Circulation 57A Subscription VNIIPI USSR State Committee Inventions and discoveries 113035, Moscow, K-35, Raushsk nab., 4/3 Production and printing company, Uzhgorod, st. Project, 4 Proofreader E. Roshko