WO2009123467A1 - Dispositif souterrain d'impact - Google Patents

Dispositif souterrain d'impact Download PDF

Info

Publication number
WO2009123467A1
WO2009123467A1 PCT/NO2009/000116 NO2009000116W WO2009123467A1 WO 2009123467 A1 WO2009123467 A1 WO 2009123467A1 NO 2009000116 W NO2009000116 W NO 2009000116W WO 2009123467 A1 WO2009123467 A1 WO 2009123467A1
Authority
WO
WIPO (PCT)
Prior art keywords
sub device
impact sub
actuator
housing
mounting
Prior art date
Application number
PCT/NO2009/000116
Other languages
English (en)
Inventor
Espen Osaland
Lasse Haugland
Original Assignee
Aker Well Service As
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 Aker Well Service As filed Critical Aker Well Service As
Publication of WO2009123467A1 publication Critical patent/WO2009123467A1/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
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/107—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars

Definitions

  • an impact sub device More particularly it concerns an impact sub device for use in a borehole where the impact sub device in its first end portion is connected to an object to a blow shall be imparted.
  • the object of the invention is to alleviate or reduce at least one of the prior art drawbacks .
  • an impact sub device for use in a cased or uncased borehole, the impact sub device in its first end portion being connected to an object to be dealt a blow, and where the impact sub device is characterised in that it in its second end portion is connected to an in the borehole fixable actuator.
  • the impact sub device in its first end portion is provided with a tool mounting for connection to the object, and in its second end portion provided with an actuator mounting, as at least one main spring is fixably connected between the actuator mounting and a housing of the impact sub device, and where the tool mounting is displacebly and releasably connected to the housing.
  • the stop ele- ment is displaceable relative to the actuator mounting.
  • the actuator mounting and the housing may thereby be displaced back toward their respective starting positions relative to the tool mounting without the stop element being displaced relative to the actuator mounting.
  • a further aspect of the impact sub device is that a cone portion connected to the actuator mounting is arranged to be able to displace the tool mounting locking hooks to engagement in the housing when the actuator mounting is near the tool mounting .
  • stop ele- ment is pre-tensioned displacebly in between the locking hooks when the housing is in its starting position relative to the tool mounting.
  • the provided impact sub device makes possible the use of blows carrying relatively large energy in areas of a borehole where earlier the access for such tools was limited.
  • the impact sub device is particularly well suited for use together with an actuator, often called “stroker” in the art, where the actuator is connected to a well tractor.
  • Fig. 1 shows schematically an impact sub device in a bore- , hole where the impact sub device is connected to an actuator and to an object to which blows shall be imparted;
  • Fig. 2 shows in greater detail a longitudinal section of the impact sub device in its starting position
  • Fig. 3 shows a part of the impact sub device of Fig. 2 in additionally larger scale, where the impact sub device is being tensioned;
  • Fig. 4 shows the impact sub device of Fig. 3 as the blow is delivered; .
  • Fig. 5 shows the impact sub device of Fig. 3 after a blow has taken place;
  • Fig. 6 shows the impact sub device of Fig. 3 while the impact sub device is being brought back to its start- 5 ing position;
  • Fig. 7 shows the impact sub device of Fig. 3 just before the impact sub device is in its starting position.
  • the reference numeral 1 indicates an impact sub device in a possibly cased borehole 2 and connected to an io actuator 4 by an actuator mounting 6 and to an object 8 which is to be imparted a blow, via a tool mounting 10.
  • the actuator 4 which is connected to a well tractor 12 is provided with clamp bars 14 which in a per se known manner are arranged to be able to clamp the actuator up against the bore- i5 hole 2.
  • the impact sub device 1 comprises a housing 16, which due to production technical conditions is assembled from a number of tubular sections.
  • the actuator mounting 6 at the second end portion 18 of the 20 impact sub device 1 extends into the housing's 16 axial through bore 20.
  • the actuator mounting 6 is also assembled from a number of axial components.
  • Two main springs 22 surrounding the actuator mounting 6 in the housing 16, are ten- sioned between the respective spring shoulders 24 in the 25 housing 16 and spring supports 26 on the actuator mounting 6.
  • the spring support 26 being closest to the tool mounting 10 is limited displaceable along the actuator mounting 6.
  • a displacement of the actuator mounting 6 in a direction toward the second end portion 18 causes the main springs 27 to 3o be tensioned.
  • the actuator mounting 6 abuts an anchor 28, which is fixedly connected to the housing 16.
  • a pair of breaking elements 30 locks the actuator mounting 6 in the housing 8 before the impact sub device 1 is to be ac- tivated.
  • the tool mounting 10 extending into the bore 20 from the first end portion 32 of the impact sub device 1 is provided with an axially slotted locking element 34.
  • the locking element 34 is provided with a number of locking hooks 36 which are radially displaceable into a locking recess 38 in the housing 16.
  • a stop element 40 which is axially displaceable in a stop bore 42 in the actuator mounting 6, extends in between the locking hooks 36 in the starting position and prevents the locking hooks 36 from being able to be displaced out of the locking recess 38.
  • a stop spring 44 in the stop boring 42 is provided for tensioning the stop element 40 in a direction toward the tool mounting 10.
  • a cone portion 46 surrounding the stop element 40 and connected to the actuator mounting 6 prevents the stop element 40 from being able to be displaced all the way out of the stop bore 42 by a stop shoulder 48 coming into abutment against the cone portion 46.
  • the housing 16 is at its first end portion 32 provided with an impact shoulder 48, which is arranged to abut an impact shoulder 50 on the tool mounting 10.
  • the impact sub device 1 is rotationally symmetrical about its longitudinal axis.
  • the actuator's 4 clamp blocks are forced against the borehole 2 wall.
  • the actuator 4 thereafter displaces the actuator mounting 6 such that the breaking elements 30 are cut, whereafter the main springs 22 are tensioned at the same time as the stop element 40 is displaced axially between the locking hooks 36, see Fig. 3.
  • the housing 16 which is tensioned by means of the main springs 22, is arranged to be displaced at high speed in the direction toward the second end portion 18 until the impact shoulder 48 abuts the impact shoulder 50, whereby the tool mounting 4 is given a blow which is transferred to the tool 8, without any real impact power being given to the actuator mounting 2, see Fig. 5.
  • the anchor 28 comes to a somewhat dampened abutment against the actuator mounting 6. The damping is due to the limited displacement ability of the spring support 26 relative to the actuator mounting 6.
  • the actuator 4 displaces the actuator mounting 6 and the housing 16 in the direction toward the first end portion 32 while the stop element 40, which is prevented from being able to be displaced in between the locking hooks 36 are displaced into the stop boring 42 at the same time as the stop spring 44 is compressed, see Fig 5.
  • the locking hooks 36 will, due to pre- loading in the locking element 34 and power from the cone portion 46 be displaced into the locking recess 38.
  • the stop spring 44 thereby displaces the stop element 40 in between the locking hooks 36, whereby the impact sub device 1 is re- verted to its starting position and made ready for a new impact cycle.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

L'invention porte sur un dispositif souterrain d'impact (1) s'utilisant dans un forage et dont une première extrémité (32) est reliée à un objet devant être frappé, et dont la deuxième extrémité est reliée à un actionneur (4) attachable au forrage (2).
PCT/NO2009/000116 2008-04-03 2009-03-30 Dispositif souterrain d'impact WO2009123467A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20081653 2008-04-03
NO20081653A NO332476B1 (no) 2008-04-03 2008-04-03 Anordning ved slagverktoy

Publications (1)

Publication Number Publication Date
WO2009123467A1 true WO2009123467A1 (fr) 2009-10-08

Family

ID=40873769

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2009/000116 WO2009123467A1 (fr) 2008-04-03 2009-03-30 Dispositif souterrain d'impact

Country Status (2)

Country Link
NO (1) NO332476B1 (fr)
WO (1) WO2009123467A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9376909B2 (en) 2012-01-24 2016-06-28 Baker Hughes Incorporated Indicator and method of verifying a tool has reached a portion of a tubular

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2068437A (en) * 1980-01-31 1981-08-12 Taylor W Downhole fishing jar mechanism
US20040188084A1 (en) * 2003-03-27 2004-09-30 Tillett Ray O E-line downhole jarring tool
US20050092494A1 (en) * 2003-10-30 2005-05-05 Impact Selector, Inc. Field adjustable impact jar

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2068437A (en) * 1980-01-31 1981-08-12 Taylor W Downhole fishing jar mechanism
US20040188084A1 (en) * 2003-03-27 2004-09-30 Tillett Ray O E-line downhole jarring tool
US20050092494A1 (en) * 2003-10-30 2005-05-05 Impact Selector, Inc. Field adjustable impact jar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9376909B2 (en) 2012-01-24 2016-06-28 Baker Hughes Incorporated Indicator and method of verifying a tool has reached a portion of a tubular
US10119391B2 (en) 2012-01-24 2018-11-06 Baker Hughes, A Ge Company, Llc Indicator and method of verifying a tool has reached a portion of a tubular

Also Published As

Publication number Publication date
NO20081653L (no) 2009-10-05
NO332476B1 (no) 2012-09-24

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