US20090166026A1 - Jar device for use in coil tubing drilling - Google Patents

Jar device for use in coil tubing drilling Download PDF

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Publication number
US20090166026A1
US20090166026A1 US11/571,358 US57135805A US2009166026A1 US 20090166026 A1 US20090166026 A1 US 20090166026A1 US 57135805 A US57135805 A US 57135805A US 2009166026 A1 US2009166026 A1 US 2009166026A1
Authority
US
United States
Prior art keywords
string part
jar
cylindrical
valve
valve surface
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/571,358
Other languages
English (en)
Inventor
Frank Akselberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Proserv Welldeco AS
Original Assignee
Proserv Welldeco 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 Proserv Welldeco AS filed Critical Proserv Welldeco AS
Assigned to PROSERV WELLDECO AS reassignment PROSERV WELLDECO AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AKSELBERG, FRANK
Publication of US20090166026A1 publication Critical patent/US20090166026A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • E21B31/113—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars hydraulically-operated

Definitions

  • the present invention relates to a jar operated by liquid pressure, especially of the type that is preferably employed in connection with drilling or maintenance operations carried out in oil or gas wells.
  • oil and/or gas wells are essentially drilled with a rotating drill string and a drill bit mounted in the bottom of the drill string.
  • a continuous drill string coil tubing
  • the coil tubing is lowered into and retrieved from the borehole by an injector.
  • At the bottom of the coil tubing there is often a liquid motor which rotates the bit by means of drilling mud that is pumped down through the coil tubing.
  • a signal cable for direction control and guidance is often lowered through the centre hole in the coil tubing.
  • Coil tubing is also used in connection with maintenance of production wells which have been in production for some time and which need to be cleaned up in order to maintain production.
  • the jar is placed in the bottom of the coil tubing and operated by fluid that is pumped down through the coil tubing.
  • U.S. Pat. No. 5,033,557 discloses a previously known fluid-operated jar for use in a well.
  • the present invention a jar design has been attained that makes it possible to achieve greater efficiency and better reliability through a simplified and more robust construction.
  • the invention also represents a simplification of production, thus making the product cheaper and thereby enabling it to be used in several situations where economic criteria are critical.
  • the present invention represents substantial improvements compared to current technology with regard to functionality, efficiency, reliability and economy.
  • FIG. 1 is a perspective view illustrating a jar according to the invention
  • FIG. 2 is a partly cut away perspective view illustrating a section through the jar structure
  • FIG. 3 is a further perspective view illustrating a detail section of the valve system in the jar.
  • FIG. 1 is a perspective view illustrating a jar according to the invention.
  • the jar comprises a first end piece 1 with a first adapter, which is provided with threads for connecting to a coil tubing or other tool.
  • the jar further comprises an outer, cylindrical casing 5 , 4 , 3 .
  • the casing 5 , 4 , 3 is preferably in three parts, comprising a first, outer cylindrical casing element 5 provided with a number of openings 6 , which is further connected to a cylindrical spacer 4 , which in turn is connected to a second, outer casing element 3 .
  • the second casing element 3 is also provided with a number of openings 7 .
  • the second casing element 3 is further connected to a second end piece 2 .
  • the second end piece 2 comprises a second adapter, which like the first adapter 1 is provided with threads for connecting to a coil tubing or other tool.
  • FIG. 2 is a partly cut away perspective view illustrating a section through the jar structure.
  • the first 5 and the second 3 cylindrical casing elements, as well as the spacer 4 are shown partly cut away.
  • FIG. 3 Further details of the jar's internal construction, including the valve system, are illustrated in FIG. 3 .
  • the jar comprises an internal hollow, through-going, cylindrical, central string part 8 .
  • the central string part 8 is connected to an enclosing valve head 9 .
  • the valve head 9 is provided with a valve surface 14 .
  • the central string part 8 is further attached to an enclosing, cylindrical weight 12 .
  • the central string part 8 , the valve head 9 and the weight 12 are together arranged to be able to be moved axially in a rectilinear forward and backward motion.
  • the jarring effect is produced by the weight 12 , which is attached to the associated, central string part 8 , being set in an axially forward and backward motion, thus causing the weight 12 to strike the shoulder 15 on the end piece 2 .
  • liquid under pressure is employed, supplied from the central string part 8 .
  • the fluid is passed through the openings 16 in the central string part 8 and on through openings 29 in an outer, cylindrical string part 17 , which is concentrically mounted on the internal cylindrical string part 8 .
  • the outer string part 17 is provided with a conical valve surface 30 which is arranged to go into abutment against the first valve surface 14 arranged on the valve head 9 .
  • the outer string part 17 is further provided with a seal 24 against the outer casing element 5 and a seal 25 against the spacer 4 .
  • a seal is provided against the inner cylindrical string part 8 by seal elements 26 and 27 which are mounted between the inner 8 and the outer 17 string part.
  • a first spring or main spring 10 is mounted enclosing the inner string part 8 , on the inside of the outer casing element 5 . Without liquid pressure, which is implicitly understood in the inner cylindrical string part 8 , the main spring 10 will push both the inner 8 and the outer 17 cylindrical string part axially, thus causing the shoulders 18 to abut against each other. In this position the first valve surface 14 will simultaneously provide a seal against fluid flow.
  • the inner string part 8 with associated valve head 9 continues the movement as the pressure continues to rise, and the valve surface 14 begins to open for through-flow through the openings 23 .
  • the sealing element 20 simultaneously abuts against the shoulder 19 .
  • the spring force of the springs 10 and 11 is arranged in such a manner that the second spring 11 holds the valve surfaces apart during the entire percussive motion, which is terminated by the inner string part 8 with the weight 12 striking the shoulder 15 on the end piece 2 , and the valve surface 14 is again closed against the valve surface 30 on the inner string part 8 .
  • the inner 8 and outer 17 cylindrical string parts are moved axially, thus causing the openings 16 and 29 to once again be opposite each other, and a new stroke begins.
  • the liquid displaced by movement of the inner 8 and the outer 17 cylindrical string parts is discharged through the opening's 6 .
  • the openings 7 act as pressure equalisation against surrounding fluid when the weight 12 is set in motion.
  • the jar is mounted in the well below the coil tubing. It will be apparent from the above that the coil tubing can be connected either to the first adapter 1 or the second adapter 2 on the jar. In both cases the jarring movement will be directed towards the end piece at the second adapter 2 . It will therefore be evident that the resulting jarring movement is directed from the coil tubing, i.e. downwards in the well, if the coil tubing is connected to the first adapter 1 , while the jarring movement will be directed towards the coil tubing, i.e. upwards in the well, if the coil tubing is connected to the second adapter 2 .
  • first 1 and the second 2 connection adapter There will be a through-going fluid passage between the first 1 and the second 2 connection adapter. It will be understood that the adapter that is not connected to the coil tubing may advantageously be connected to another tool for use in well drilling and/or well maintenance operations.

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)
  • Earth Drilling (AREA)
US11/571,358 2004-06-29 2005-06-29 Jar device for use in coil tubing drilling Abandoned US20090166026A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20042727A NO324184B1 (no) 2004-06-29 2004-06-29 Anordning ved slaghammer til bruk ved kveilrorsboring
NO20042727 2004-06-29
PCT/NO2005/000239 WO2006006867A1 (fr) 2004-06-29 2005-06-29 Dispositif a coulisse utilise dans un systeme de forage a tube enroule

Publications (1)

Publication Number Publication Date
US20090166026A1 true US20090166026A1 (en) 2009-07-02

Family

ID=35005973

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/571,358 Abandoned US20090166026A1 (en) 2004-06-29 2005-06-29 Jar device for use in coil tubing drilling

Country Status (3)

Country Link
US (1) US20090166026A1 (fr)
NO (1) NO324184B1 (fr)
WO (1) WO2006006867A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090095490A1 (en) * 2007-10-11 2009-04-16 Moriarty Keith A Electrically activating a jarring tool
WO2013028310A2 (fr) * 2011-08-19 2013-02-28 Baker Hughes Incorporated Vibrateur souterrain présentant une fonction de vibration latérale
US20130186619A1 (en) * 2012-01-20 2013-07-25 Nathan Wicks Method and apparatus of distributed systems for extending reach in oilfield applications
US9470055B2 (en) 2012-12-20 2016-10-18 Schlumberger Technology Corporation System and method for providing oscillation downhole
US10077615B2 (en) 2015-07-31 2018-09-18 ASDR Canada Inc. Sound absorber for a drilling apparatus
US10267114B2 (en) 2016-02-29 2019-04-23 Hydrashock, L.L.C. Variable intensity and selective pressure activated jar

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20073009L (no) * 2007-06-13 2008-12-15 I Tec As Vaesketrykkaktivert sekvensventil for aksialt virkende slagverktoy

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566546A (en) * 1982-11-22 1986-01-28 Evans Robert W Single acting hydraulic fishing jar
US5033557A (en) * 1990-05-07 1991-07-23 Anadrill, Inc. Hydraulic drilling jar
US6062322A (en) * 1998-06-15 2000-05-16 Sandvik Ab Precussive down-the-hole rock drilling hammer
US6454026B1 (en) * 2000-09-08 2002-09-24 Sandvik Ab Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure
US20020185312A1 (en) * 2001-05-03 2002-12-12 Armell Richard A. Impact tool

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1426481A (en) * 1973-03-20 1976-02-25 Mason Tools Ltd Lee Hydraulic tools for use in drill strings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566546A (en) * 1982-11-22 1986-01-28 Evans Robert W Single acting hydraulic fishing jar
US5033557A (en) * 1990-05-07 1991-07-23 Anadrill, Inc. Hydraulic drilling jar
US6062322A (en) * 1998-06-15 2000-05-16 Sandvik Ab Precussive down-the-hole rock drilling hammer
US6454026B1 (en) * 2000-09-08 2002-09-24 Sandvik Ab Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure
US20020185312A1 (en) * 2001-05-03 2002-12-12 Armell Richard A. Impact tool

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090095490A1 (en) * 2007-10-11 2009-04-16 Moriarty Keith A Electrically activating a jarring tool
US8499836B2 (en) * 2007-10-11 2013-08-06 Schlumberger Technology Corporation Electrically activating a jarring tool
WO2013028310A2 (fr) * 2011-08-19 2013-02-28 Baker Hughes Incorporated Vibrateur souterrain présentant une fonction de vibration latérale
WO2013028310A3 (fr) * 2011-08-19 2013-04-25 Baker Hughes Incorporated Vibrateur souterrain présentant une fonction de vibration latérale
US20130186619A1 (en) * 2012-01-20 2013-07-25 Nathan Wicks Method and apparatus of distributed systems for extending reach in oilfield applications
US9702192B2 (en) * 2012-01-20 2017-07-11 Schlumberger Technology Corporation Method and apparatus of distributed systems for extending reach in oilfield applications
US9470055B2 (en) 2012-12-20 2016-10-18 Schlumberger Technology Corporation System and method for providing oscillation downhole
US10968713B2 (en) 2012-12-20 2021-04-06 Schlumberger Technology Corporation System and method for providing oscillation downhole
US10077615B2 (en) 2015-07-31 2018-09-18 ASDR Canada Inc. Sound absorber for a drilling apparatus
US10267114B2 (en) 2016-02-29 2019-04-23 Hydrashock, L.L.C. Variable intensity and selective pressure activated jar
US11480022B2 (en) 2016-02-29 2022-10-25 Hydrashock, L.L.C. Variable intensity and selective pressure activated jar

Also Published As

Publication number Publication date
NO20042727L (no) 2005-12-30
NO20042727D0 (no) 2004-06-29
NO324184B1 (no) 2007-09-03
WO2006006867A1 (fr) 2006-01-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: PROSERV WELLDECO AS, NORWAY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AKSELBERG, FRANK;REEL/FRAME:018762/0940

Effective date: 20070112

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION