WO2016024210A2 - Clapet de non-retour anti-bouchon de gaz - Google Patents

Clapet de non-retour anti-bouchon de gaz Download PDF

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Publication number
WO2016024210A2
WO2016024210A2 PCT/IB2015/056089 IB2015056089W WO2016024210A2 WO 2016024210 A2 WO2016024210 A2 WO 2016024210A2 IB 2015056089 W IB2015056089 W IB 2015056089W WO 2016024210 A2 WO2016024210 A2 WO 2016024210A2
Authority
WO
WIPO (PCT)
Prior art keywords
gas
bell
valve
check valve
nut
Prior art date
Application number
PCT/IB2015/056089
Other languages
English (en)
Spanish (es)
Other versions
WO2016024210A3 (fr
Inventor
Alejandro LADRON DE GUEVARA
Original Assignee
Representaciones Y Servicios De Petroleos, Serinpet Limitada.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Representaciones Y Servicios De Petroleos, Serinpet Limitada. filed Critical Representaciones Y Servicios De Petroleos, Serinpet Limitada.
Publication of WO2016024210A2 publication Critical patent/WO2016024210A2/fr
Publication of WO2016024210A3 publication Critical patent/WO2016024210A3/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained

Definitions

  • the invention corresponds to a check valve against gas blocking for subsoil pumps in mechanical pumping technologies (consisting of a surface unit, a string of rods and a subsoil pump), which eliminates gas blocking, decreases the blow of fluid and prevents binding by solids in subsoil pumps.
  • the gas check check valve consists of four main parts: a nut, a spring, a bell and a body with production holes.
  • the spring that rests on the nut constantly exerts a downward force on the bell, forcing the bell to settle on the body, closing the production holes.
  • the gas check check valve prevents the pressure of the hydrostatic column, inside a well, from being exerted on the traveling valve of the subsoil pump during the downward movement of the system or before a system shutdown.
  • the present invention corresponds to an anti-block gas check valve that prevents gas blockage, reduces fluid shock and protects solids (sands) to subsoil pumps that are used, in mechanical pumping technologies, for the production of hydrocarbons. .
  • the oil industry has multiple types of technologies, known as artificial lifting technologies, which are used for the production of hydrocarbons.
  • One of these artificial lifting technologies is known as mechanical pumping.
  • Mechanical pumping requires a subsoil pump for hydrocarbon production.
  • these subsoil pumps are blocked by the presence of high percentages of gas in oil. Additionally, the fluid blow and the presence of sands generate damage to the subsoil pump components, decreasing the reliability and useful life of the system.
  • the present invention has applicability in oil wells where mechanical pumping is used as artificial lifting technology.
  • Mechanical pumping is an artificial lifting technology widely used in the world to extract hydrocarbons from the underground to the surface.
  • This technology consists of a system consisting of a surface unit, a string of rods and a subsoil pump.
  • the subsoil pump is composed of a cylindrical sleeve and two check valves, a traveler and a stationary one.
  • the cylindrical volume limited to the inner diameter of the jacket and the variable length between the traveling valve and the stationary valve is the chamber that is flooded with fluid coming from the well.
  • the traveling valve When the traveling valve rises, it closes as a result of the load exerted by the hydrostatic column that generates the fluid that is being produced. At the same time the stationary valve opens allowing fluid to enter the chamber. When the traveling valve lowers, it opens allowing the passage of the fluid contained in the chamber towards the surface. At the same time, the stationary valve is closed supporting the load exerted by the hydrostatic column that generates the fluid that is being produced. This cycle is repeated several times a day, producing hydrocarbons.
  • Subsoil pumps lose efficiency as a result of the high presence of gas in the hydrocarbon. This loss of efficiency is known as gas blockage in the subsoil pump. This phenomenon occurs inside the subsoil pump chamber, when the gas separates from the oil being located between the oil and the traveling valve. Since the pressure exerted by the hydrostatic column of the production fluid, which is located on the traveling valve, is greater than the pressure of the gas that is below the traveling valve, the gas will be compressed during the downward movement until the Gas pressure exceeds the pressure of the hydrostatic column, opening the traveling valve and allowing the passage of fluid to the surface. As a result, the subsoil pump chamber is not filled to one hundred percent thus decreasing the pump's filling efficiency. Finally, after several cycles, the pump ends up presenting an accumulation of one hundred percent of gas in the chamber preventing the pumping of hydrocarbons towards the surface.
  • fluid blow Another problem that subsoil pumps have is the fluid blow. This phenomenon (fluid blow) occurs when the subsoil pump chamber is not completely filled by any fluid (gas, oil or water), usually due to the low fluid intake of the well. When the chamber is partially full and the traveling valve drops, it suddenly collides with the surface of the fluid inside the chamber, causing premature deterioration in the components of the artificial lift system, especially the rod string and the traveling valve.
  • the present invention is a gas check check valve for subfloor pumps in mechanical pumping technologies.
  • This technology is composed of a surface unit, a string of rods and a subsoil pump.
  • the gas check valve is installed by threading the lower thread 9 into the upper stop of the subfloor pump, and it is traversed by the shaft that connects the rod string with the traveling valve of the subsoil pump.
  • the operation of the mechanical pumping systems is based on the opening and closing of the check valves (traveling and stationary) that contains the subsoil pump. Additionally, these pumps have a cylindrical sleeve that limits the diameter of the internal volume of the subsoil pump.
  • the size of the chamber depends on the length between the check valves of the subsoil pump and the internal diameter of the jacket.
  • the chamber is expected to be completely flooded with liquid fluid in order to take advantage of the maximum possible volume of the subsoil pump.
  • the surface unit When the surface unit is operated, it raises and lowers the string of rods that connects the surface unit with the traveling valve of the subsoil pump. When the rod string rises, the traveling valve closes and rises, while the stationary valve opens allowing the passage of fluid from the reservoir into the subsoil pump chamber. Likewise, when the string of rods falls, the traveling valve opens and falls, while the stationary valve closes allowing the passage of the fluid, contained in the chamber, towards the surface. In this way, when the traveling valve is closed, it supports the load produced by the hydrostatic column on it. Similarly, when the stationary valve is closed, it supports the load produced by the hydrostatic column on it. It is precisely these loads that allow the check valves of the subsoil pump to be closed. Finally, the cycle is repeated several times a day thus allowing the production of hydrocarbons.
  • the gas check valve is characterized by having a nut 1, an external pressure retaining gasket 2, an oring 3, an internal pressure retaining gasket 4, a spring 5, a bell 6, a body 7, which can be visualize in figure 1.
  • the traveling valve of the subsoil pump When the traveling valve of the subsoil pump is in the upward path, it displaces the production fluid into the body 7 of the gas check valve. This increases the pressure inside the body 7, raising the bell 6 and compressing the spring 5, as shown in Figure 3. This is possible because the internal pressure retaining gasket 4 prevents the passage of fluid between the hole for shaft 10 of body 7 and the shaft that connects the rod string with the traveling valve of the subsoil pump. In this way the fluid is forced to pass through the production holes 8 of the body 7 in the direction of the surface.
  • the traveling valve of the subsoil pump When the traveling valve of the subsoil pump is in the downward path, the bell 6 descends by the expansion of the spring 5 and sits on the body 7 closing the production holes 8, as shown in Figure 2.
  • the pressure exerted by the hydrostatic column, during the downward movement of the traveling valve, is applied on the bell 6 and the external pressure retaining gasket 2 that is located inside the nut 1.
  • the traveling valve from the subsoil pump, is isolated from the pressure exerted by the hydrostatic column during the downward movement.
  • the oring 3 is installed as a safety measure to prevent the retaining gaskets from losing their sealing capacity due to possible fluid content between the nut 1 and the body 7.
  • the gas check check valve assembly is carried out by inserting the bell 6, and the spring 5 in the body 7. Subsequently, the nut 1 is threaded and fixed on the upper thread 1 1 of the body 7. In this way, the nut 1 provides support to the spring 5 so that it moves the bell 6 by seating it on the body 7, closing the production holes 8.
  • Gas blockage in the subsoil pumps occurs when the traveling valve withstands the pressure exerted by the hydrostatic column of the fluid, which is located above it, and that exceeds the pressure of the gas cushion of the fluid contained inside the chamber , just below the traveling valve. This prevents the traveling valve from opening during the downward movement in order to allow the fluid contained in the chamber to pass to the surface.
  • the size of the gas mattress increases (up to 100% chamber volume) reaching the point where the traveling valve does not open, thus blocking the subsoil pump.
  • the hydrostatic pressure of the fluid column during the downward movement of the system, will be supported by the bell 6, the external pressure retaining gasket 2 and the oring 3 That is, the traveling valve is isolated from the pressure exerted by the hydrostatic column.
  • a third problem faced by underground pumps in mechanical pumping is the clogging of the pump due to the presence of sands.
  • clogging occurs when the surface unit is stopped allowing solids contained and distributed in the fluid column to rush into the subfloor pump and settle on the traveling valve.
  • the spring 5 will expand by placing the bell 6 on the body 7, preventing the passage of sands into the subsoil pump. In other words, the solids will settle on the bell 6 and not on the traveling valve of the subsoil pump.
  • Check valve anti gas block characterized by having a bell 6 that sits on a body 7 in order to prevent the pressure of the hydrostatic column of a well is exerted on the traveling valve of a subsoil pump.
  • Gas check valve characterized by having a body 7 with a lower thread 9 used to install said valve in the upper stop of a subsoil pump.
  • Gas check check valve characterized by having an external pressure retaining gasket 2 that prevents the passage of fluid between the nut 1 and the shaft that connects the rods to the traveling valve of the subsoil pump.
  • Gas check check valve characterized by having an internal pressure retaining gasket 4 that prevents the passage of fluid between the body 7 and the shaft that connects the rods to the traveling valve during the upward movement of the traveling valve of the pump of subsoil.
  • Gas check block valve characterized by having a spring 5 which exerts a downward force on the bell 6 so that the gas block valve remains normally closed.
  • Gas check valve characterized by having a nut 1, a spring 5 and a bell 6, concentric to a body 7.
  • Gas check valve characterized by having a nut 1, a spring 5 and a bell 6, concentric to a body 7, where the nut 1 is screwed into the upper thread 1 1 of the body 7.
  • Gas check valve characterized by having a nut 1, a spring 5 and a bell 6, concentric to a body 7, where a bell 6 moves axially on the body 7.
  • Gas check valve characterized by having a nut 1, a spring 5 and a bell 6, concentric to a body 7, where the nut 1 can be unscrewed from the upper thread 11 to allow the installation of the bell 6 and the spring 5.
  • Figure 1 Explosion view of the gas check check valve.
  • Figure 2 Section view of the gas check check valve, normally closed position.
  • Figure 3 Section view of the gas check check valve, open position.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Check Valves (AREA)

Abstract

L'invention concerne un clapet de non-retour anti-bouchon de gaz pour pompes de fond, trouvant une application dans les technologies de pompage mécanique (avec unité de surface, train de tiges et pompe de fond), permettant de supprimer le phénomène de bouchon de gaz, de limiter les problèmes de pompage trop rapide du fluide et d'éviter le colmatage par des solides dans les pompes de fond. Ce clapet de non-retour anti-bouchon de gaz est constitué par quatre parties principales : un écrou, un ressort, une cloche et un corps avec orifices de production. Pendant le mouvement descendant du clapet de refoulement ou avant un arrêt du système, le ressort qui repose contre l'écrou exerce de manière constante une force descendante sur la cloche, contraignant la cloche à appuyer sur le corps, fermant ainsi les orifices de production. Il en résulte que le clapet de non-retour anti-bouchon de gaz empêche que la pression de la colonne hydrostatique à l'intérieur d'un puits soit exercée sur le clapet de refoulement de la pompe de fond pendant le mouvement descendant du système ou avant un arrêt du système.
PCT/IB2015/056089 2014-08-09 2015-08-10 Clapet de non-retour anti-bouchon de gaz WO2016024210A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CO14173498 2014-08-09
CO14-173498 2014-08-09

Publications (2)

Publication Number Publication Date
WO2016024210A2 true WO2016024210A2 (fr) 2016-02-18
WO2016024210A3 WO2016024210A3 (fr) 2016-04-28

Family

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PCT/IB2015/056089 WO2016024210A2 (fr) 2014-08-09 2015-08-10 Clapet de non-retour anti-bouchon de gaz

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WO (1) WO2016024210A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106567695A (zh) * 2016-11-02 2017-04-19 中国石油化工股份有限公司 一种油井防气系统
CN110185423A (zh) * 2019-05-28 2019-08-30 东北石油大学 旋进式双极可调恒流堵塞器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6497281B2 (en) * 2000-07-24 2002-12-24 Roy R. Vann Cable actuated downhole smart pump
US6382244B2 (en) * 2000-07-24 2002-05-07 Roy R. Vann Reciprocating pump standing head valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106567695A (zh) * 2016-11-02 2017-04-19 中国石油化工股份有限公司 一种油井防气系统
CN110185423A (zh) * 2019-05-28 2019-08-30 东北石油大学 旋进式双极可调恒流堵塞器
CN110185423B (zh) * 2019-05-28 2021-07-02 东北石油大学 旋进式双极可调恒流堵塞器

Also Published As

Publication number Publication date
WO2016024210A3 (fr) 2016-04-28

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