RU95368U1 - Differential bar pump - Google Patents

Differential bar pump Download PDF

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Publication number
RU95368U1
RU95368U1 RU2010107319/22U RU2010107319U RU95368U1 RU 95368 U1 RU95368 U1 RU 95368U1 RU 2010107319/22 U RU2010107319/22 U RU 2010107319/22U RU 2010107319 U RU2010107319 U RU 2010107319U RU 95368 U1 RU95368 U1 RU 95368U1
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RU
Russia
Prior art keywords
plunger
valve
rod
pump
pusher
Prior art date
Application number
RU2010107319/22U
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Russian (ru)
Inventor
Рашит Мусагитович Ахунов
Рашит Мухаметшакирович Абдулхаиров
Равиль Раисович Каримов
Михаил Владимирович Кочубей
Наиля Рашитовна Каюмова
Original Assignee
Открытое акционерное общество Всероссийский нефтегазовый научно-исследовательский институт имени академика А.П. Крылова (ВНИИнефть)
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Application filed by Открытое акционерное общество Всероссийский нефтегазовый научно-исследовательский институт имени академика А.П. Крылова (ВНИИнефть) filed Critical Открытое акционерное общество Всероссийский нефтегазовый научно-исследовательский институт имени академика А.П. Крылова (ВНИИнефть)
Priority to RU2010107319/22U priority Critical patent/RU95368U1/en
Application granted granted Critical
Publication of RU95368U1 publication Critical patent/RU95368U1/en

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Abstract

 A differential sucker rod pump containing a cylinder connected to the column of pump tubes, in which plungers are connected, connected with the string of pump suckers, the larger upper plunger having a through channel and a discharge valve, and the lower plunger made in the form of a monolithic rod, while the annular space enclosed between the walls of the cylinder and the surface of the rod, forms a working chamber of the pump with a suction valve made in the form of a plate coaxial with the cylinder with a hole through which it is hermetically sealed a monolithic rod is missing, characterized in that the discharge valve is made in the form of a rod valve with a pusher interacting with a plunger connected from above to the rod string and from below to a monolithic rod, the valve being made in the form of a plate coaxial with the plunger and located below the plunger and the pusher is located above the plunger, and the distance between the valve and the pusher is selected so that the passage section between the end face of the plunger and the valve is not less than the passage section between the rod and the inner surface of the plunger.

Description

The proposal relates to techniques for oil production, in particular to differential sucker rod pumps, and can be used for pumping highly viscous fluids from wells.
A well-known sucker rod pump for the production of highly viscous oil (see patent RU 55892, F04B 47/00, 2006), comprising a cylinder, a suction valve made normally closed and pushed to the seat, a plunger, a discharge valve-valve with a pusher interacting with the plunger.
A disadvantage of the known sucker rod pump for the production of highly viscous oil is the difficulty of filling the pump cylinder with a highly viscous liquid due to the large hydraulic resistances in the suction valve.
The closest to the proposed differential sucker rod pump, in technical essence and the achieved result, is a differential sucker rod pump (see patent RU 39366, F04В 47/00, 2004), containing a cylinder connected to a column of pump pipes, in which a differential connected to the string of pump suckers is installed a plunger, the upper step of a larger diameter is hollow and equipped with a discharge valve, and the lower one is made in the form of a monolithic rod, hermetically passing through the hole in the poppet suction valve, Mr. coaxially with the cylinder.
The well-known differential sucker rod pump allows you to raise highly viscous products from the wells, however, the upward movement of the rod string is hindered by significant hydraulic resistance in the discharge valve, which, moreover, is delayed.
The technical task of the proposed device is to increase the efficiency and reliability of the differential pump by facilitating the downward travel of the rod string and clearer operation of the discharge valve.
The stated technical problem is solved in that in the proposed differential pump containing a cylinder connected to a column of pump pipes, in which plungers connected to a column of pump rods are installed, the upper plunger of a larger diameter having a through channel and equipped with a discharge valve, and the lower plunger is made in the form of a monolithic rod, with the annular space enclosed between the walls of the cylinder and the surface of the rod, forms a working chamber of the pump with a suction valve, made in the form of coaxial with the plate’s top with a hole through which the monolithic rod is hermetically passed, the discharge valve is made in the form of a valve-valve with a pusher interacting with a plunger connected from above to the rod string and from below to a monolithic rod, while the valve is made in the form of a plate coaxial with the plunger and is located below the plunger, and the pusher is located above the plunger, and the distance between the valve and the pusher is selected so that the passage section between the end face of the plunger and the valve is not less than the passage section between the rod and the morning surface of the plunger.
Studies have shown that the implementation of the discharge valve in the form of a rod-valve with a pusher interacting with a plunger connected to the top with a rod string, and from the bottom to a monolithic rod, while the valve is designed as a plate coaxial with the plunger and its location below the plunger, location the pusher is higher than the plunger, and the choice of the distance between the valve and the pusher is such that the bore between the end of the plunger and the valve is not less than the bore between the rod and the inner surface of the plunger facilitates the stroke rod string down by reducing the hydraulic resistance in the pressure relief valve by actuation of the discharge valve, an increase in its flow cross section and reduce the speed of fluid passing therethrough. In addition, this design of the discharge valve provides a clearer operation due to forced actuation during opening and closing, which eliminates the delay in actuation or sticking of the valve, reduces the stroke loss of the upper plunger.
The set of distinctive features of the proposed differential sucker rod pump makes it easier to move the column of rods down, eliminate its freezing when lifting a highly viscous liquid, to ensure a clear operation of the discharge valve.
The figure schematically shows a differential sucker rod pump.
The differential sucker rod pump contains a cylinder 1 connected to the column of pump tubes 2, in which a larger diameter plunger 3 with a through channel 4 is installed, equipped with a discharge valve in the form of a valve stem with a pusher 5 located above the plunger 3 on the rod 6 installed in the through channel 4 of the plunger 3. The valve 7 of the stem valve is made in the form of a plate coaxial with the plunger 3 and is located below the plunger 3. The stem valve is connected to the column of rods 8 from the top, and from the bottom with a smaller diameter, the plunger 9, made in the form of a monolithic rod, is hermetically sealed Missed through an aperture in a plate suction valve 10.
Differential sucker rod pump operates as follows.
During the course of the column of rods 8, the rod-valve with the pusher 5 and the valve 7, as well as the smaller diameter of the plunger 9, moves upward. In this case, the passage section between the end face of the plunger 3 and the valve 7 closes and the valve 7 moves the plunger 3 upwards with the liquid above it , which rises further along the column of pump pipes 2, and the suction valve 10 opens and the liquid through it enters the cylinder 1 under the plunger 3.
During the course of the string of rods 8, the rod-valve with the pusher 5 and the valve 7 moves downward, as well as the smaller diameter of the plunger 9. At the same time, the suction valve 10 closes, the passage section between the end of the plunger 3 and the valve 7 opens due to the friction force between the cylinder 1 and the plunger 3 holds the plunger 3 in place, and the valve 7 moves the stem 6 down, then the pusher 5 moves down the plunger 3 and the fluid in the cylinder 1 flows through the passageway between the end face of the plunger 3 and valve 7, as well as the through channel 4 from under plunger 3 into the cavity on the plunger 3.
Technical appraisal and economic advantages of the proposed solution are to increase the efficiency and reliability of the differential sucker rod pump by facilitating the downward travel of the rod string and clearer actuation of the discharge valve, which is especially important when lifting highly viscous liquids.

Claims (1)

  1. A differential sucker rod pump containing a cylinder connected to the column of pump tubes, in which plungers are connected, connected with the string of pump suckers, the larger upper plunger having a through channel and a discharge valve, and the lower plunger made in the form of a monolithic rod, while the annular space enclosed between the walls of the cylinder and the surface of the rod, forms a working chamber of the pump with a suction valve made in the form of a plate coaxial with the cylinder with an opening through which it is hermetically sealed a monolithic rod is missing, characterized in that the discharge valve is made in the form of a rod valve with a pusher interacting with a plunger connected from above to the rod string and from below to a monolithic rod, the valve being made in the form of a plate coaxial with the plunger and located below the plunger and the pusher is located above the plunger, and the distance between the valve and the pusher is selected in such a way that the bore between the end of the plunger and the valve is not less than the bore between the stem and the inner surface of the plunger.
    Figure 00000001
RU2010107319/22U 2010-03-01 2010-03-01 Differential bar pump RU95368U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2010107319/22U RU95368U1 (en) 2010-03-01 2010-03-01 Differential bar pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2010107319/22U RU95368U1 (en) 2010-03-01 2010-03-01 Differential bar pump

Publications (1)

Publication Number Publication Date
RU95368U1 true RU95368U1 (en) 2010-06-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
RU2010107319/22U RU95368U1 (en) 2010-03-01 2010-03-01 Differential bar pump

Country Status (1)

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RU (1) RU95368U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU171538U1 (en) * 2016-11-24 2017-06-06 Акционерное общество "Российская инновационная топливно-энергетическая компания (АО "РИТЭК") Borehole Pumping Unit
RU2730774C1 (en) * 2020-02-12 2020-08-25 Мухтар Зуфарович Валитов Downhole sucker-rod pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU171538U1 (en) * 2016-11-24 2017-06-06 Акционерное общество "Российская инновационная топливно-энергетическая компания (АО "РИТЭК") Borehole Pumping Unit
RU2730774C1 (en) * 2020-02-12 2020-08-25 Мухтар Зуфарович Валитов Downhole sucker-rod pump

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PC11 Official registration of the transfer of exclusive right

Effective date: 20120229

PC11 Official registration of the transfer of exclusive right

Effective date: 20140411