RU2369775C1 - Sucker-rod pump of well - Google Patents

Sucker-rod pump of well Download PDF

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Publication number
RU2369775C1
RU2369775C1 RU2008132186/06A RU2008132186A RU2369775C1 RU 2369775 C1 RU2369775 C1 RU 2369775C1 RU 2008132186/06 A RU2008132186/06 A RU 2008132186/06A RU 2008132186 A RU2008132186 A RU 2008132186A RU 2369775 C1 RU2369775 C1 RU 2369775C1
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RU
Russia
Prior art keywords
plunger
cylinder
oil
closed cavity
pump
Prior art date
Application number
RU2008132186/06A
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Russian (ru)
Inventor
Ривенер Мусавирович Габдуллин (RU)
Ривенер Мусавирович Габдуллин
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Ривенер Мусавирович Габдуллин
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Priority to RU2008132186/06A priority Critical patent/RU2369775C1/en
Application granted granted Critical
Publication of RU2369775C1 publication Critical patent/RU2369775C1/en

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Abstract

FIELD: oil and gas production.
SUBSTANCE: invention refers to engineering of oil production, particularly to sucker-rod pumps of well and can be implemented in oil and gas producing industry. The pump consists of a cylinder with a suction valve in a lower part. A hollow cylinder plunger is installed in the cylinder; a pressure valve is assembled in a lower part of the plunger. A sealing facility is located between the cylinder and the plunger. The sealing facility is made in form of a closed cavity filled with oil; the cavity is formed by side surface of the plunger and circular lugs made on internal surface of the cylinder; the lugs are arranged in a middle part of the cylinder and are equipped with sealing rings interacting with side cylinder surface of the plunger. Via a channel the closed cavity communicates with an oil tank installed above the cylinder. Length of the plunger is equal or more, than sum of lengths of the closed cavity and a maximal run of the plunger. The closed cavity can be equipped with a perforated cylinder shell installed between circular lugs along side surface of the plunger.
EFFECT: upgraded reliability of pump operation and increased efficiency of sealing rings.
2 dwg, 2 cl

Description

The invention relates to techniques for oil production, in particular to downhole sucker rod pumps, and can be used in the oil and gas industry.
Closest to the invention is a borehole sucker rod pump containing a cylinder with a suction valve in the lower part, a hollow cylindrical plunger placed in the cylinder, a discharge valve installed in the lower part, and a sealing device located between the cylinder and the plunger (see copyright certificate SU No. 1576722 , CL F04B 47/02, 07/07/1990).
However, the lack of lubrication of the plunger at the place of installation of the sealing rings leads to intensive wear, which reduces the reliability of the sucker rod pump.
The problem to which the present invention is directed, is to improve the lubrication of the plunger and o-rings.
The technical result consists in increasing the reliability of the pump and increasing the efficiency of the sealing rings.
This problem is solved, and the technical result is achieved due to the fact that the downhole sucker rod pump contains a cylinder with a suction valve in the lower part, a hollow cylindrical plunger located in the cylinder, a discharge valve is installed in the lower part, and a sealing device located between the cylinder and the plunger the sealing device is made in the form of a closed cavity filled with oil, formed by the lateral surface of the plunger and annular protrusions made on the inner surface cylinder bores located in the middle part of the cylinder and provided with o-rings interacting with the lateral cylindrical surface of the plunger, while the closed cavity is communicated via a channel with an oil tank mounted above the cylinder, and the length of the plunger is equal to or greater than the sum of the lengths of the closed cavity and the maximum stroke of the plunger.
Preferably, the closed cavity is provided with a perforated cylindrical shell mounted between the annular protrusions along the lateral surface of the plunger.
Performing a closed oil-filled cavity with two o-rings allows pumping heavily contaminated liquids with a high solids content. The presence of a lubricating fluid between the plunger and the cylinder of the pump reduces the wear of the rubbing pair of the plunger-cylinder. The decrease in friction in the pair reduces the hang of the rod string and energy consumption for lifting the pumped fluid from the well. The proposed pump allows you to work with high viscosity oils, because the gap between the plunger and the cylinder is isolated from the pumped liquid, which expands the possibilities of using the park of pumping units. Replacing conventional borehole sucker rod pumps with the proposed one does not require anything extra, because they have a common principle of work. The pump can operate with a lower intake of pumped liquid than the pump capacity, up to the complete absence of pumped liquid and the pump runs “dry” without damage to the pump and its overheating due to its autonomous lubricating system. The above advantages of the proposed pump can significantly increase the overhaul period of the pump.
Figure 1 presents a longitudinal section of a borehole sucker rod pump.
Figure 2 presents an embodiment of a pump with a perforated cylindrical shell.
The well sucker rod pump comprises a cylinder 1 with a suction valve 2 in the lower part, a hollow cylindrical plunger 3 located in the cylinder 1, and a pressure valve 4 installed in the lower part. The sealing device is placed between the cylinder 1 and the plunger 3 and is made in the form of a closed cavity 5 filled oil and formed by the lateral surface of the plunger 3 and the annular protrusions 6, made on the inner surface of the cylinder 1, located in the middle of the cylinder 1 and provided with sealing rings 7, the interaction existing with the lateral cylindrical surface of the plunger 3. The closed cavity 5 is communicated through the channel 8 with an oil tank 9 mounted above the cylinder 1, and the length of the plunger 3 is equal to or greater than the sum of the lengths of the closed cavity 5 and the maximum stroke of the plunger 3.
The closed cavity 5 is equipped with a perforated cylindrical shell 10 mounted between the annular projections 6 along the lateral surface of the plunger 3, which makes it possible to more evenly distribute the lubricant on the surface of the plunger 3 and prevent foreign particles from entering the surface of the plunger 3 if they enter the oil.
The plunger 3 is installed with the possibility of reciprocating movement in the cylinder 1 from the drive on the surface (not shown) through the column of rods 11, and the cylinder 1 is installed in the well on the column of tubing 12.
Downhole sucker rod pump operates as follows.
At the beginning of the suction of the pumped liquid, the plunger 3 is in its lowest position and starts to move up, which leads to a decrease in pressure in the lower part of the cylinder 1 and the opening of the suction valve 2, through which the pumped liquid begins to flow into the cylinder 1. When the plunger 3 reaches its extreme upper The position of the process of suction of the pumped liquid into the cylinder 1 ends, the suction valve 2 closes, and in the cylinder 1 is the volume of fluid pumped out of the well. When the plunger 3 moves down in the cylinder 1, due to a decrease in its free volume, pressure begins to increase. Due to the excess pressure of the pumped liquid in the cylinder 1 compared with the pressure in the column of tubing 12, the discharge valve 4 opens and the pumped liquid from the bottom of the cylinder 1 through the hollow plunger 3 enters the column of the tubing 12 and then to the surface to the consumer. When the plunger 3 reaches its lowest position, the next cycle of the borehole sucker rod pump starts, similar to that described above.
The present invention can be used in the oil and other industries in the production of various liquid media from wells using well sucker rod pumps.

Claims (2)

1. A well sucker rod pump comprising a cylinder with a suction valve in the lower part, a hollow cylindrical plunger placed in the cylinder, a discharge valve installed in the lower part, and a sealing device located between the cylinder and the plunger, characterized in that the sealing device is made in the form of a closed cavities filled with oil, formed by the lateral surface of the plunger and annular protrusions made on the inner surface of the cylinder, located in the middle of the cylinder and supplied with sealing rings interacting with the lateral cylindrical surface of the plunger, wherein the closed cavity is communicated via a channel with an oil tank mounted above the cylinder, and the length of the plunger is equal to or greater than the sum of the lengths of the closed cavity and the maximum stroke of the plunger.
2. The well pump according to claim 1, characterized in that the closed cavity is provided with a perforated cylindrical shell mounted between the annular protrusions along the lateral surface of the plunger.
RU2008132186/06A 2008-08-06 2008-08-06 Sucker-rod pump of well RU2369775C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2008132186/06A RU2369775C1 (en) 2008-08-06 2008-08-06 Sucker-rod pump of well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2008132186/06A RU2369775C1 (en) 2008-08-06 2008-08-06 Sucker-rod pump of well

Publications (1)

Publication Number Publication Date
RU2369775C1 true RU2369775C1 (en) 2009-10-10

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RU2008132186/06A RU2369775C1 (en) 2008-08-06 2008-08-06 Sucker-rod pump of well

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012036591A1 (en) * 2010-09-13 2012-03-22 Gabdullin Rivener Musavirovich Differential rod pump
WO2014017942A1 (en) * 2012-07-25 2014-01-30 Дигвид Энтерпрайсиз Лимитед Downhole sucker-rod pump
RU2519153C1 (en) * 2013-04-15 2014-06-10 Ривенер Мусавирович Габдуллин Downhole pump unit
RU2643921C1 (en) * 2017-04-27 2018-02-06 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Well sucker-rod pump
RU2654559C1 (en) * 2017-08-08 2018-05-21 Общество с Ограниченной Ответственностью "Региональный научно-технологический центр Урало-Поволжья" ООО "РНТЦ Урало-Поволжья" Sucker rod piston pump
RU2654558C1 (en) * 2017-07-25 2018-05-21 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Oil well pump
RU2696837C1 (en) * 2018-06-01 2019-08-06 Общество с ограниченной ответственностью "Региональный научно-технологический центр Урало-Поволжья", ООО "РНТЦ Урало-Поволжья" Sucker-rod subsurface piston pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012036591A1 (en) * 2010-09-13 2012-03-22 Gabdullin Rivener Musavirovich Differential rod pump
WO2014017942A1 (en) * 2012-07-25 2014-01-30 Дигвид Энтерпрайсиз Лимитед Downhole sucker-rod pump
RU2559679C1 (en) * 2012-07-25 2015-08-10 Дигвид Энтерпрайсиз Лимитед Well sucker-rod pump
RU2519153C1 (en) * 2013-04-15 2014-06-10 Ривенер Мусавирович Габдуллин Downhole pump unit
RU2643921C1 (en) * 2017-04-27 2018-02-06 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Well sucker-rod pump
RU2654558C1 (en) * 2017-07-25 2018-05-21 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Oil well pump
RU2654559C1 (en) * 2017-08-08 2018-05-21 Общество с Ограниченной Ответственностью "Региональный научно-технологический центр Урало-Поволжья" ООО "РНТЦ Урало-Поволжья" Sucker rod piston pump
RU2696837C1 (en) * 2018-06-01 2019-08-06 Общество с ограниченной ответственностью "Региональный научно-технологический центр Урало-Поволжья", ООО "РНТЦ Урало-Поволжья" Sucker-rod subsurface piston pump

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20180807