RU5828U1 - PUMP FOR LIFTING LIQUID FROM WELLS - Google Patents

Abstract

A pump for lifting liquid from wells, containing one or more separate module sections, consisting of a cylindrical body and end parts screwed into it, an electric motor located below the pump, and a power cable laid along the surface of the pump, one of the end parts of each body section is equipped with ribs to protect the cable from mechanical damage during the descent of the pump into the well, characterized in that the fixed ribs are installed on the upper end part of the housing of each section, in addition, neither NJ endpiece of the body portion, the articulation with the motor, is provided with ribs with the possibility of rotation around the longitudinal axis of the section.

Description

IOVEK-FIELD MODEL

PUMP DAY LIFT LIFT FROM WELL

The utility model relates to the field of pumping for lifting fluid from boreholes and can be used in submersible pumps for oil production, which are predominantly centrifugal, driven by a submersible electric motor.

Widely known are submersible centrifugal electric pumps for pumping formation fluids from oil wells, containing one

or several separate sections / modules /, consisting of a cylindrical body to end ends screwed into it, a driver located Н1 above the pump, and a supply ka (npojfoEli ny on the surface of the pump, while one of the end parts of the housing of each session is equipped with ribs for protection cable from mechanical damage during descent / ascent / pump into the well l, C.II3-I30, Fig. 4.1, 4.2, 4.4, 4.5J.

In these pumps, cei-aliyas are interconnected by flanged joints with bolts and nuts (hereinafter referred to as bolt-jackdaw connection). At the same time, the lower end part of the housing / hereinafter the base / end of the section has a groove / screw groove above the flange for insertion and placement of nuts, and the upper end part of the wrinkle / further - the head / end of the section is provided with a longer groove under the flange for the insertion of bolts. In order to protect the cable, special ribs are installed on the base of each section directly above the nut groove for the nuts.

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spontaneously turn off. Under the influence of pressure and vibration created by the pump, the load on the remaining bolts increases, reaches the limit and breaks them. As a result, part of the equipment falls to the bottom of the well. There is a need for an expensive repair of squans for lifting a fallen one |: 1

dovanya. Quite often, wells have to be shut. The number of such equipment flights reaches 4 ,,, 6 of the number of failures of pump installations per year and entails enormous material costs.

Known also is a submersible centrifugal pump in which a bolt-nut decommissioned earlier is equipped with a flywheel in the SMZI. the pumps are screwed onto the connected bolt-housing, the bolt being placed upside down on the base of the section so that the mass of the bolt would prevent its spontaneous unscrewing and is screwed into the body of the section head flange / 2,3j,

It should be noted that the current oil well fund in Russia, operated by the units described: pumps, currently has reached 50,000 units, and the fleet of pumps, taking into account those in reserve and repair, is almost twice as large. All pump sizes are widely unified, most components and components are interchangeable, and any design change entails an increase in the cost of repairing pumps.

For this reason, in the well-known pump, in order to preserve the section shaft overhang and the base length, the extended groove on the base for introducing bolts is made by reducing the length of the ribs to protect the cable, install on the same base above the groove,

The disadvantages of the known pump include the following. Due to the limited length of the groove, it is necessary to use bolts

limited length and shortened ribs, not interchangeable about

in operation and production. In addition, due to the need to introduce special grooves to accommodate the ribs, the bolt insertion point is made with a stepped neck, due to which the bolts can be inserted into the groove only in a certain position of the bolt head faces. The limited groove base also prevents the necessary fillets from being inserted neck grooves to relieve stress concentration in the base material.

The essence of the present invention is to ensure the reliability and strength of the flange connections and cable protection along the bottom of the pump, as well as the interchangeability of newly manufactured pump parts with those in operation.

These tasks are achieved by the fact that the fixed ribs are installed on the upper end part of the casing of each section, in addition, the lower end part of the casing of the section, articulated with an electric motor, is equipped with ribs with the possibility of rotation around the longitudinal axis of the seat.

The essence of the proposed pump for lifting fluid from the squeegee: cn is illustrated by a drawing on one sheet, where on / figD / shows a general view of the pump, on / Fig.2/ - flanged. Connection of the test and on / fig./- ribs of the lower section .

The proposed pump /$i-ir.I/ is lowered into well I on pipes 2 and contains: there are several separate sections / modules /, for example, the upper 3 connected to the pipe 2, prom} 1 {specify 10 4 and the lower 5 connected to the drive by electric motor 6. Each section sends a cylindrical body 7 and end parts screwed into it: head 8 ayai 9 and base 10 or II, cable 12 is attached to pipes 2, laid along surfaces 3.4 and 5 and protected from mechanical contact with well I with the help of rzber 13 and 14, while the ribs 13 are fixed, and the ribs 14 can be curved around the longitudinal the axis of section 5 for combined with the ribs 13. Sections 3, i 4,5 are interconnected bolt 15 / Fig. 2 /, heads up and inserted into the groove 16. Flange I is slightly thickened to allow the introduction of a special fillet 18, and the groove 16 sends a sufficient jym to use the enlarged fillet 19, The ribs 14 consist of half rings 20 and 21 (Fig. 3/), are installed in the grooves 22 on the base II and tightened on the neck of the inlet 22 of the bolt w 23, which allows during assembly of section 5 to rotate them around the longitudinal axis of segdium 5 until they are aligned with ribs 13 mounted fixed on head 9. A pre-pumped pump for lifting liquid from squalins will provide increase firmly the ty and reliability of the flange joints of the sections 3.4, 5 with the introduction of the necessary length of the groove 16 and the bolts 15, as well as the bases 10 of the introduction on the neck of the groove 16 fillets 18 h 19 of increased radius and removal, so that the stress concentration in places of transition. Preserving the dimensions of the ribs 13 will ensure their interchangeability in the manufacture and operation of pumps. The proposed solutions also provide interchangeability supplied from factories and to: pumps operating in operation along the length of the heads 9 and the bases 10 of the sections 3,4,5 and the departure of the shafts of these sections. Sources of information: 1. Oilfield equipment, ref. edited by Bukhalenko, ed., M., Nedra, 1990, pp. 113-138, fig. 4.1, 4.2, -.1, 4.5. 2. Submersible centrifugal pumps in modular design Tima 2EShM, Connas avenue, II520I, F / i., Kashirsky pr. 21. 4. 3. Materials U1 of the technical configuration for submersible HaooGmi, November 10-14, 1996., 423400, P, Tatarstan, Almetyevsk-I, AZPEN Alnas l G l GLTTG TT ft A JSC. . It

Claims (1)

A pump for lifting liquid from wells, containing one or more separate module sections, consisting of a cylindrical body and end parts screwed into it, an electric motor located below the pump, and a power cable laid along the surface of the pump, one of the end parts of each body section is equipped with ribs to protect the cable from mechanical damage during the descent of the pump into the well, characterized in that the fixed ribs are installed on the upper end part of the housing of each section, in addition, neither NJ endpiece of the body portion, the articulation with the motor, is provided with ribs with the possibility of rotation around the longitudinal axis of the section.