WO2009079770A1 - Garniture double à soupape à deux étages pour la stimulation sélective de puits - Google Patents

Garniture double à soupape à deux étages pour la stimulation sélective de puits Download PDF

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Publication number
WO2009079770A1
WO2009079770A1 PCT/CA2008/002233 CA2008002233W WO2009079770A1 WO 2009079770 A1 WO2009079770 A1 WO 2009079770A1 CA 2008002233 W CA2008002233 W CA 2008002233W WO 2009079770 A1 WO2009079770 A1 WO 2009079770A1
Authority
WO
WIPO (PCT)
Prior art keywords
wellbore
seal
packer
fracing
zone
Prior art date
Application number
PCT/CA2008/002233
Other languages
English (en)
Inventor
Robert Kratochvil
Scott Kirk
Dan Schofield
Darko Smolcic
Original Assignee
Extreme Energy Solutions Inc.
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 Extreme Energy Solutions Inc. filed Critical Extreme Energy Solutions Inc.
Publication of WO2009079770A1 publication Critical patent/WO2009079770A1/fr

Links

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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space

Definitions

  • the present invention provides for a novel packing tool for isolation of a portion of a wellbore subject to high pressure fracturing operations from the rest of the wellbore.
  • the present invention relates to such a packing tool which can be efficiently run into the wellbore in the presence of included fluids and or high pressure.
  • the zone to be stimulated be segregated from zones both below and above during the fracturing or stimulation operation. This is typically done by placing packers on the tubing string being used for the fracturing or stimulation operation to seal the annulus between the string and the casing at points below and above the portion of the tubing string through which high pressure fluids (with or without additives) are injected into the wellbore and through production ports in the well's casing, into the production zone, to effect the desired well stimulus.
  • This invention provides for a valve which when run down a wellbore opens a passage to bypass the lower seals of the tool through which passageway water or similar fluid in the wellbore may pass as the tubing and packing tool are lowered down the well- bore through the water or similar fluid, and which can selectively be closed when the packer and tubing string is placed where desired, thus providing isolation of a fracing zone from zones both above and below the stimulation operation.
  • This permits the tool to be run into a wellbore through fluids in the wellbore without the usual hydraulic resistance encountered when using a tool from the prior art.
  • the invention in one embodiment, provides a straddle packer with a dual stage valve which opens and closes a fluid passageway, comprising i.
  • a drag body connected to a hollow mandrel; ii. the hollow mandrel, open at one end to the wellbore below the straddle packer, with an outer surface; iii. slideably fit into a matching cavity in the straddle packer's lower body; iv.
  • the cavity configured to be operatively sealed with the outer surface of the hollow mandrel, and with a port which, when the packer is open, communicates between the mandrel's hollow to the wellbore below the tool and through the cavity and then the body to the annulus between the packer and the wellbore, and which, when the packer is closed, is configured such that the port is sealed by the sealed interface between the outer surface of the hollow mandrel and the inner surface of the body's cavity; and v.
  • a dual-stage valve straddle packer for insertion into a wellbore and delivery of fracing and stimulation service to a particular zone of the wellbore comprising: i. a body operatively connected to a tubing string, with fluid communication to the inner bore of the tubing; ii.
  • the body having an upper cup-seal for isolation of fluid delivered under pressure through fracing ports in the body below that seal by sealing the annulus between the body and the wellbore's casing; iii. the body having a set of lower cup-seals for isolation, by a top lower cup-seal of the fracing ports from the wellbore below the top lower seal, and by a bottom lower cup-seal of the wellbore below the bottom lower seal from the fracing ports, the cup-seals being essentially one-way seals sealing a higher pressure side from a lower pressure side, the seals deployed to seal the annulus between the body and the wellbore's casing; iv.
  • valve being capable of opening and closing, responsive to a movement of the body in the wellbore, where an upward movement will close the valve and a downward movement will open the valve.
  • a method of inserting a straddle packer for isolation of a fracing service in a zone from zones in a wellbore above and below the fracing zone comprising the steps: i. where the straddle packer has three uni-directional seals, sealing flow from high pressure side to low pressure side, the uppermost seal sealing the low pressure wellbore zone above the tool from a high pressure fracing zone below the uppermost seal; a middle seal sealing the high pressure fracing zone above the middle seal from a low pressure wellbore zone below the seal, and a lowermost seal sealing a high pressure wellbore zone below the lowermost seal from flowing around the middle seal, when lower pressure exists between the two uppermost seals, otherwise a seal will not act as a seal; ii.
  • valve is caused to close by movement of the packer uphole, isolating the wellbore below the packer from the fracing zone between the uppermost and middle seals for fracing.
  • Fig. 1 is a perspective drawing of the tool.
  • Fig. 2 is a cutaway drawing showing a cross-section of the tool along a plane which intersects the tool diametrically along its longitudinal axis.
  • This invention provides for a valve which when run down a wellbore opens a passage to bypass the lower seals of the tool through which water or similar fluid in the wellbore may pass as the tubing and packing tool are lowered down the well-bore through the wellbore water or similar fluid, and which can selectively be closed when the packer and tubing string is placed where desired, thus providing isolation of a fracing zone from zones both above and below the stimulation operation.
  • This permits the tool to be run into a wellbore through fluids in the wellbore without the usual hydraulic resistance encountered when using a tool from the prior art.
  • the valve is included in a tool on the lower end of a tubing string for use in fracturing or stimulating a well using high pressure fluid.
  • the valve assembly is open while being inserted into the well-bore on the lower end of the tubing, and provides a passageway from below the tool through an opening in the tool's bottom end 10 then through a passage 20 formed by a hollow mandrel 25 through a port 27 at the top end of the mandrel 25 and through a port 30 on the exterior of the tool, thus bypassing the cup- seal 40 which would ordinarily seal the annulus between the tool and the well's casing by virtue of pressure exerted by fluid on the lower side of the cup-seal 40, the passageway continuing then in the annulus between the tool and the casing past upward-facing cup- seal 50 through frac ports 35 into the hollow centre of the upper end of the tool 70, bypassing cup-seal 60, and into the tubing string to which the tool is attached when in operation (not shown).
  • the valve mechanism comprises the drag body 80, hollow mandrel 25, internal port 27, the inside surface of a mating cavity inside the tool's lower body 31 which encloses and slideably receives the hollow mandrel 25, and then through the port(s) 30.
  • the internal port 27 is sealed against the inside of the tool's lower body cavity 31 enclosing the hollow mandrel, causing the passageway above-described to be closed to the passage of fluid.
  • the passageway of the tool is open, but when it is desirable to close the passageway to isolate that portion of the wellbore below the fracing zone, which is around 35 between cup-seal 60 and cup-seals 40 and 50 acting together, the tubing string is stopped in its downward (into hole) movement and pulled upward (out of hole), causing the drag body 80 to exert a downward force on the attached hollow mandrel 25, moving it out of the tool's lower body, around 31, which encloses and slideably receives the mandrel 25, a predetermined distance, sliding the internal port 27 down past the port 30, sealing the tool closed.
  • the drag body 80 exerts force in this embodiment, by friction of wipers against the casing.
  • the force exerted by the drag body is, in a preferred embodiment, approximately 400 pounds, but an appropriate amount of drag will be determined by very simple experimentation.
  • the valve can be run into the hole in an open configuration, then closed by the above-described operation for the fracing operation, and then again opened when the tool is again lowered, and thus is a controllable "dual stage" valve (open, closed).
  • cup-seal 60 isolates the lower-pressure uphole zone from the high pressure fracing zone
  • cup-seal 50 isolates the higher pressure fracing zone from the zone below cup-seal 50, and so still isolates the stimulation at the fracing zone around 35 from the lower-pressure other portions of the well-bore, and so the stimulation service can continue to be carried out regardless of valve position.
  • the dual stage straddle packer is, to that extent, "fail-safe", and will not ordinarily cause the requirement to trip out of the wellbore in the event of a failure of the valve.
  • the tool has the added benefit over other types of valves (such as ball-and-seat valves) which might be deployed in its place, of providing large cross sectional areas of flow, and high flow rates, and being isolated entirely below cup-seal 50 from the high pressure fluid and additives introduced during fracing.
  • valves such as ball-and-seat valves

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)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

L'invention porte sur une garniture double qui, mise en place pendant une opération de fracturation ou de stimulation d'un puits, isole la zone de fracturation des zones situées au-dessus et en dessous, et qui, descendue dans le puits, offre un passage entre la zone du dessous et la colonne de production, ce qui réduit la pression accumulée sous l'outil et permet des insertions à des vitesses relativement élevées.
PCT/CA2008/002233 2007-12-21 2008-12-19 Garniture double à soupape à deux étages pour la stimulation sélective de puits WO2009079770A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,616,182 2007-12-21
CA 2616182 CA2616182A1 (fr) 2007-12-21 2007-12-21 Packer double a vanne a deux etages pour la stimulation selective des puits

Publications (1)

Publication Number Publication Date
WO2009079770A1 true WO2009079770A1 (fr) 2009-07-02

Family

ID=39277256

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2008/002233 WO2009079770A1 (fr) 2007-12-21 2008-12-19 Garniture double à soupape à deux étages pour la stimulation sélective de puits

Country Status (2)

Country Link
CA (1) CA2616182A1 (fr)
WO (1) WO2009079770A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112324416A (zh) * 2020-11-05 2021-02-05 中国石油天然气股份有限公司 一种老井选择性重复改造用多封隔器工艺管柱及方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227731A (en) * 1940-03-15 1941-01-07 Lynes John Well formation testing and treating tool
US2607424A (en) * 1946-04-13 1952-08-19 Mcgaffey Taylor Corp Well packer
US3648777A (en) * 1969-04-04 1972-03-14 Roy L Arterbury Well bore circulating tool including positioning method by casing annulus fluid stretching tubing string
US4590995A (en) * 1985-03-26 1986-05-27 Halliburton Company Retrievable straddle packer
US5383520A (en) * 1992-09-22 1995-01-24 Halliburton Company Coiled tubing inflatable packer with circulating port
US6655461B2 (en) * 2001-04-18 2003-12-02 Schlumberger Technology Corporation Straddle packer tool and method for well treating having valving and fluid bypass system
US7051812B2 (en) * 2003-02-19 2006-05-30 Schlumberger Technology Corp. Fracturing tool having tubing isolation system and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227731A (en) * 1940-03-15 1941-01-07 Lynes John Well formation testing and treating tool
US2607424A (en) * 1946-04-13 1952-08-19 Mcgaffey Taylor Corp Well packer
US3648777A (en) * 1969-04-04 1972-03-14 Roy L Arterbury Well bore circulating tool including positioning method by casing annulus fluid stretching tubing string
US4590995A (en) * 1985-03-26 1986-05-27 Halliburton Company Retrievable straddle packer
US5383520A (en) * 1992-09-22 1995-01-24 Halliburton Company Coiled tubing inflatable packer with circulating port
US6655461B2 (en) * 2001-04-18 2003-12-02 Schlumberger Technology Corporation Straddle packer tool and method for well treating having valving and fluid bypass system
US7051812B2 (en) * 2003-02-19 2006-05-30 Schlumberger Technology Corp. Fracturing tool having tubing isolation system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112324416A (zh) * 2020-11-05 2021-02-05 中国石油天然气股份有限公司 一种老井选择性重复改造用多封隔器工艺管柱及方法
CN112324416B (zh) * 2020-11-05 2022-08-30 中国石油天然气股份有限公司 一种老井选择性重复改造用多封隔器工艺管柱及方法

Also Published As

Publication number Publication date
CA2616182A1 (fr) 2008-04-08

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