US20080246273A1 - Positive Indication of Latching in an Inner and Outer Tube Assembly, Especially for Downhole Assemblies - Google Patents
Positive Indication of Latching in an Inner and Outer Tube Assembly, Especially for Downhole Assemblies Download PDFInfo
- Publication number
- US20080246273A1 US20080246273A1 US11/632,809 US63280905A US2008246273A1 US 20080246273 A1 US20080246273 A1 US 20080246273A1 US 63280905 A US63280905 A US 63280905A US 2008246273 A1 US2008246273 A1 US 2008246273A1
- Authority
- US
- United States
- Prior art keywords
- piston
- cylinder
- valve
- recess
- latch body
- 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
Links
- 230000000712 assembly Effects 0.000 title 1
- 238000000429 assembly Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Images
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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/02—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
-
- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/20—Joints and connections with indicator or inspection means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/60—Biased catch or latch
- Y10T403/602—Biased catch or latch by separate spring
Definitions
- This invention relates to core drilling and more particularly to a latch body and valve mechanism which provides positive indication of the correct latching of an inner tube assembly when the landing shoulder of the latch body seats in the landing ring of the outer tube.
- a latch body and valve mechanism for providing a positive indication of the correct latching of an inner tube assembly
- the latch body having a water inlet port, a latching shoulder below the water inlet port and a water outlet port below the latching shoulder
- the valve mechanism comprises a piston moveable within a first cylinder above the inlet port between an uncocked position and a cocked position in which a cocking mechanism restricts movement of one end of the piston into the first cylinder, the piston having a sealing flange at its other end, a second cylinder between the inlet port and outlet port having a spring guide therein, the spring guide having a valve seat facing the sealing flange and an opening at its other end leading to the outlet port, a spring within the spring guide adapted to bear against the flange of the piston, the arrangement being such that when the piston is in the cocked position the flange is within the top of the second cylinder adjacent to but spaced from the valve seat and prevented from moving away from
- the cocking mechanism comprises a ball adapted to seat in a recess at the top of the piston away from the flange and the first cylinder has a recess for receiving part of the ball, the arrangement being such that the piston is cocked by withdrawing it from the cylinder so that the ball may sit partly in the recess and bear against the end of the piston to prevent the piston from retracting into the cylinder.
- FIG. 1 is a perspective view of a latch body and valve latch mechanism according to one embodiment of the invention together with a latching tool
- FIG. 2 is a cross-sectional view of the latch body and valve mechanism shown in FIG. 1 ,
- FIG. 3 is an exploded view of the latch body and valve mechanism shown in FIG. 2 ,
- FIG. 4 is a partly sectioned view of the valve mechanism with the latching tool inserted and the latch body in a horizontal position
- FIG. 5 is a view similar to FIG. 4 with the latching tool rotated so as to cock the valve mechanism
- FIG. 6 is a partly sectioned view of the latch body in its vertical operating disposition, with the valve mechanism in its cocked position
- FIG. 7 is a view similar to FIG. 6 showing the valve mechanism being pressurised
- FIG. 8 shows the valve mechanism in its inoperative position after positive latching has been indicated.
- the tubular latch body 10 shown in FIGS. 1 to 3 . 10 incorporates spring-loaded latches 11 , 12 which secure the inner tube assembly 41 in place by latching against a shoulder in an adaptor coupling (not shown).
- latch body 10 At the lower end of the latch body 10 there are water inlet ports 13 , a landing shoulder 14 , water outlet ports 15 and a lower housing 16 to which an inner tube (not shown) is connected.
- the latch body 10 has a spear point 17 and a sleeve portion 18 which has a pair of opposed slots 43 through which the latches 11 , 12 project. At the lower end of each latch 11 and 12 there is an inwardly sloping shoulder 19 .
- the spring loaded latches 11 and 12 are biased to their latched position but will only truly latch when the inner tube is correctly seated when the landing shoulder 14 of the latch body seats in the landing ring of the outer tube (not shown). When this happens, all water flow must pass through the water ports 13 and 15 and the latches 11 and 12 are situated below the internal shoulder in the adaptor coupling which will prevent the inner tube assembly from rising.
- the valve mechanism 20 shown in its uncocked position in FIG. 2 is located within the lower end of the latching body 10 and includes a piston 21 slidable within an upper or first cylinder or chamber 22 located above the inlet ports 13 .
- the piston 21 has a recess 23 at its upper end for receiving a ball 24 and a sealing flange 25 at its lower end.
- the upper cylinder 22 has a recess 26 in which part of the ball 24 can seat.
- the base 29 seats against annular shoulder 33 of the lower housing 6 .
- the valve mechanism 20 is shown in its cocked position in FIG. 6 .
- the valve mechanism 20 is cocked with the latching body 10 in a horizontal position with the recess 26 lowermost by inserting a latching tool or lever 50 into the uppermost inlet port 13 and catching the working tab 52 of the latching tool 50 on the top face of the flange 25 as shown in FIG. 4 .
- the piston 21 is then forced down against the force of the spring 31 by rotating the handle 51 of the lever 50 .
- the valve mechanism 20 is shown pressurised in FIG. 7 .
- the flange 25 has been forced down by the rising water pressure causing closure of the passageway in the spring guide 28 from the port 13 to the outlet port 15 .
- the flange 25 of the piston 21 is thus forced against the valve seat 30 and the piston 21 is held there by water pressure on top of the flange 25 acting to compress the spring 31 .
- the ball 24 falls out of the recess 26 into the recess 23 on the top of the piston 21 (see arrow in FIG. 7 ).
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)
- Safety Valves (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
A latch body (10) incorporates spring-loaded latches (11) and (12) which secure the inner tube assembly in place by latching against a shoulder in an adaptor coupling. At the lower end of the latch body (10) there are water inlet ports (13), a landing shoulder (14) and water outlet ports (15). The valve mechanism (20) includes a piston (21) slidable within upper cylinder (22) above the inlet ports (12) which has a recess (23) at its upper end for receiving a ball (24) and a sealing flange (25), at its lower end. The upper cylinder (22) has a recess (26) in which part of the ball can seat to cock the piston. A second cylinder (27) between the inlet ports (13) and outlet ports (15) carries a spring guide (28) having a valve seat (30) at its upper end. A spring (31) acts against the sealing flange (25). When the piston (21) is cocked, the sealing flange (25) is adjacent to and spaced from the valve seat (30) and is forced spaced from the valve seat (30) and is forced against the valve seat (30) by water pressure to close the valve and uncock the piston.
Description
- This invention relates to core drilling and more particularly to a latch body and valve mechanism which provides positive indication of the correct latching of an inner tube assembly when the landing shoulder of the latch body seats in the landing ring of the outer tube.
- When a drill run has been completed and the inner tube is ready to be pulled, an overshot on a wire line is dropped down the borehole and latches itself onto the spear point. By pulling the overshot upwards, the latches connecting the inner tube assembly to the adaptor coupling are closed unlatching the inner tube assembly which is then retrieved. When the inner tube assembly is being relocated in the outer tube there is a need to provide a positive indication that the inner tube is properly latched.
- According to one aspect of the invention there is provided a latch body and valve mechanism for providing a positive indication of the correct latching of an inner tube assembly, the latch body having a water inlet port, a latching shoulder below the water inlet port and a water outlet port below the latching shoulder, and wherein the valve mechanism comprises a piston moveable within a first cylinder above the inlet port between an uncocked position and a cocked position in which a cocking mechanism restricts movement of one end of the piston into the first cylinder, the piston having a sealing flange at its other end, a second cylinder between the inlet port and outlet port having a spring guide therein, the spring guide having a valve seat facing the sealing flange and an opening at its other end leading to the outlet port, a spring within the spring guide adapted to bear against the flange of the piston, the arrangement being such that when the piston is in the cocked position the flange is within the top of the second cylinder adjacent to but spaced from the valve seat and prevented from moving away from the valve seat by the cocking mechanism, the flange being forced against the valve seat by water pressure to close the valve and uncock the piston.
- Preferably, the cocking mechanism comprises a ball adapted to seat in a recess at the top of the piston away from the flange and the first cylinder has a recess for receiving part of the ball, the arrangement being such that the piston is cocked by withdrawing it from the cylinder so that the ball may sit partly in the recess and bear against the end of the piston to prevent the piston from retracting into the cylinder.
-
FIG. 1 is a perspective view of a latch body and valve latch mechanism according to one embodiment of the invention together with a latching tool, -
FIG. 2 is a cross-sectional view of the latch body and valve mechanism shown inFIG. 1 , -
FIG. 3 is an exploded view of the latch body and valve mechanism shown inFIG. 2 , -
FIG. 4 is a partly sectioned view of the valve mechanism with the latching tool inserted and the latch body in a horizontal position, -
FIG. 5 is a view similar toFIG. 4 with the latching tool rotated so as to cock the valve mechanism, -
FIG. 6 is a partly sectioned view of the latch body in its vertical operating disposition, with the valve mechanism in its cocked position, -
FIG. 7 is a view similar toFIG. 6 showing the valve mechanism being pressurised, and -
FIG. 8 shows the valve mechanism in its inoperative position after positive latching has been indicated. - The tubular
latch body 10 shown inFIGS. 1 to 3 . 10 incorporates spring-loadedlatches latch body 10 there arewater inlet ports 13, alanding shoulder 14,water outlet ports 15 and alower housing 16 to which an inner tube (not shown) is connected. - The
latch body 10 has aspear point 17 and asleeve portion 18 which has a pair ofopposed slots 43 through which thelatches latch shoulder 19. - The spring loaded
latches landing shoulder 14 of the latch body seats in the landing ring of the outer tube (not shown). When this happens, all water flow must pass through thewater ports latches - When a run has been drilled and the inner tube assembly is ready to be pulled, an overshot on a wire line rope is dropped down and latches itself onto the
spear point 17. By pulling the rope attached to the overshot with a wire line winch, thesleeve portion 18 is pulled upwardly and the bottom of each of theslots 43 engage the slopingshoulders 19 to force thelatches latch body 10 thereby unlatching the inner tube assembly which can then be retrieved. - The
valve mechanism 20 shown in its uncocked position inFIG. 2 is located within the lower end of thelatching body 10 and includes apiston 21 slidable within an upper or first cylinder orchamber 22 located above theinlet ports 13. Thepiston 21 has arecess 23 at its upper end for receiving aball 24 and a sealingflange 25 at its lower end. Theupper cylinder 22 has arecess 26 in which part of theball 24 can seat. - Beneath the
inlet ports 13 there is a lower or second open-ended cylinder 27 and within thelower cylinder 27 there is aspring guide 28 having abase 29, and avalve seat 30 at its upper end. Within theguide 28 there is aspring 31. Thebase 29 seats againstannular shoulder 33 of the lower housing 6. - As shown in
FIG. 8 , when theball 24 is sitting in the piston recess 23, thespring 31 is not under high compression and water can flow into theinlet ports 13, over thespring 13, through thespring guide 28 and out theopening 32 in thebase 29 of thespring guide 28 to theoutlet ports 15. - The
valve mechanism 20 is shown in its cocked position inFIG. 6 . Thevalve mechanism 20 is cocked with thelatching body 10 in a horizontal position with therecess 26 lowermost by inserting a latching tool or lever 50 into theuppermost inlet port 13 and catching theworking tab 52 of thelatching tool 50 on the top face of theflange 25 as shown inFIG. 4 . Thepiston 21 is then forced down against the force of thespring 31 by rotating thehandle 51 of thelever 50. When thepiston 21 has been forced far enough down, theball 24 will partly seat in the upper cylinder recess 26 under the influence of gravity and leave sufficient of the ball exposed so as to jam thepiston 21 in a position where theflange 25 is still clear of thevalve seat 30 but as theflange 25 is in the top part of thelower cylinder 27 water can not flow from theinlet ports 13 through thespring guide 28 to theoutlet ports 15. - The
valve mechanism 20 is shown pressurised inFIG. 7 . Theflange 25 has been forced down by the rising water pressure causing closure of the passageway in thespring guide 28 from theport 13 to theoutlet port 15. Theflange 25 of thepiston 21 is thus forced against thevalve seat 30 and thepiston 21 is held there by water pressure on top of theflange 25 acting to compress thespring 31. At this stage theball 24 falls out of therecess 26 into therecess 23 on the top of the piston 21 (see arrow inFIG. 7 ). - No water can flow through the
water ports flange 25 and thevalve seat 30 and if there is correct latching this causes a rise in water pressure indicating the correct seating and latching of the inner tube. After a predetermined rise in water pressure, the water pump is stopped, the pressure in the system vented to atmosphere and thepiston 21 forced to the top of its stroke again by thespring 31 thereby allowing water to flow through theports
Claims (6)
1. A latch body and valve mechanism for providing a positive indication of the correct latching of an inner tube assembly having a water inlet port above a latching shoulder and a water outlet port below the latching shoulder, and wherein the valve mechanism comprises a piston moveable within a first cylinder above the inlet port between an uncocked position and a cocked position in which a cocking mechanism restricts movement of one end of the piston into the first cylinder, the piston having a sealing flange at its other end, a second cylinder between the inlet port and outlet port having a spring guide therein, the spring guide having a valve seat facing the sealing flange and an opening at its other end leading to the outlet port, a spring within the spring guide adapted to bear against the flange of the piston, the arrangement being such that when the piston is in the cocked position the flange is within the top of the second cylinder adjacent to but spaced from the valve seat and prevented from moving away from the valve seat by the cocking mechanism, the flange being forced against the valve seat by water pressure to close the valve and uncock the piston.
2. A latch body and valve mechanism according to claim 1 wherein the cocking mechanism comprises a ball adapted to seat in a recess at the top of the piston away from the flange and the first cylinder has a recess for receiving part of the ball, the arrangement being such that the piston is cocked by withdrawing it from the cylinder so that the ball may sit partly in the recess and bear against the end of the piston to prevent the piston from retracting into the cylinder.
3. A latch body and valve mechanism according to claim 2 wherein the closure of the valve enables the ball to move from the recess in the first cylinder to the recess in the piston so that upon release of the water pressure the piston will be forced by the spring into the first cylinder with the sealing flange of the piston moving away from the valve seat to open the valve.
4. A latch body and valve mechanism according to claim 1 further including a sleeve portion above the valve mechanism having a pair of opposed slots through which latches project to engage an adaptor coupling.
5. A latch body and valve mechanism according to claim 4 wherein each latch has an upper shoulder adapted to engage the adaptor coupling and lower sloping shoulders adapted to be engaged by the lower end of the slot so to retract the latch when the sleeve portion is raised.
6. A latch body and valve mechanism according to claim 2 wherein the piston is cocked by laying the latch body and valve mechanism horizontal, inserting a rotatable tool into the inlet port to engage the upper surface of the sealing flange of the piston, and rotating the tool so that the piston is moved against the action of the spring to allow the ball to partly enter the recess in the first cylinder.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2004906841A AU2004906841A0 (en) | 2004-11-30 | Positive indication of latching | |
AU2004906841 | 2004-11-30 | ||
PCT/AU2005/001776 WO2006058363A1 (en) | 2004-11-30 | 2005-11-22 | Positive indication of latching in an inner and outer tube assembly, especially for downhole assemblies |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080246273A1 true US20080246273A1 (en) | 2008-10-09 |
Family
ID=36564666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/632,809 Abandoned US20080246273A1 (en) | 2004-11-30 | 2005-11-22 | Positive Indication of Latching in an Inner and Outer Tube Assembly, Especially for Downhole Assemblies |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080246273A1 (en) |
PE (1) | PE20060705A1 (en) |
WO (1) | WO2006058363A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100012383A1 (en) * | 2007-03-03 | 2010-01-21 | Longyear Tm, Inc. | High productivity core drilling system |
WO2010115284A1 (en) | 2009-04-09 | 2010-10-14 | Les Entreprises Parlec Ltée | Locking device for a drilling device |
WO2013110160A1 (en) * | 2012-01-27 | 2013-08-01 | Atlas Copco Canada Inc. | Core barrel valve assembly |
US9151129B2 (en) | 2011-08-01 | 2015-10-06 | Groupe Fordia Inc. | Core barrel assembly including a valve |
US9328608B2 (en) | 2009-10-07 | 2016-05-03 | Longyear Tm, Inc. | Driven latch mechanism |
CN112377128A (en) * | 2020-11-11 | 2021-02-19 | 中国地质科学院地质力学研究所 | Locator is retrieved with freedom in installation of drilling stressmeter |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023111870A1 (en) * | 2021-12-15 | 2023-06-22 | Reflex Instruments Asia Pacific Pty Ltd | Deployment tool and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2152794A (en) * | 1938-02-08 | 1939-04-04 | Dripps Harold | Oil well sample taking means |
US2851954A (en) * | 1955-08-25 | 1958-09-16 | Kobe Inc | Counterflow free pump system |
US3968839A (en) * | 1975-03-21 | 1976-07-13 | Swihart Sr Patrick S | Subsurface flow control apparatus |
US5113703A (en) * | 1990-08-09 | 1992-05-19 | Atlantic Richfield Company | Tubing end locating apparatus for wellbores |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5413171A (en) * | 1992-05-01 | 1995-05-09 | Downhole Systems, Inc. | Latching and sealing assembly |
US5799742A (en) * | 1996-10-22 | 1998-09-01 | Northwest Machine Works, Inc. | Core drilling latch assembly |
SE517258E (en) * | 1999-08-24 | 2009-03-26 | Atlas Copco Rocktech Ab | Method of valve, valve, and device for link core drilling including such valve |
US6896050B2 (en) * | 2003-05-15 | 2005-05-24 | Ps Technology, Inc. | Latching system for maintaining position of component within a downhole drill string section |
-
2005
- 2005-11-22 US US11/632,809 patent/US20080246273A1/en not_active Abandoned
- 2005-11-22 WO PCT/AU2005/001776 patent/WO2006058363A1/en active Application Filing
- 2005-11-29 PE PE2005001383A patent/PE20060705A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2152794A (en) * | 1938-02-08 | 1939-04-04 | Dripps Harold | Oil well sample taking means |
US2851954A (en) * | 1955-08-25 | 1958-09-16 | Kobe Inc | Counterflow free pump system |
US3968839A (en) * | 1975-03-21 | 1976-07-13 | Swihart Sr Patrick S | Subsurface flow control apparatus |
US5113703A (en) * | 1990-08-09 | 1992-05-19 | Atlantic Richfield Company | Tubing end locating apparatus for wellbores |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100012383A1 (en) * | 2007-03-03 | 2010-01-21 | Longyear Tm, Inc. | High productivity core drilling system |
US8333255B2 (en) * | 2007-03-03 | 2012-12-18 | Longyear Tm, Inc. | High productivity core drilling system |
WO2010115284A1 (en) | 2009-04-09 | 2010-10-14 | Les Entreprises Parlec Ltée | Locking device for a drilling device |
US9140084B2 (en) | 2009-04-09 | 2015-09-22 | Les Entreprises Parlec Ltée | Locking device for a drilling device |
US9328608B2 (en) | 2009-10-07 | 2016-05-03 | Longyear Tm, Inc. | Driven latch mechanism |
US9151129B2 (en) | 2011-08-01 | 2015-10-06 | Groupe Fordia Inc. | Core barrel assembly including a valve |
WO2013110160A1 (en) * | 2012-01-27 | 2013-08-01 | Atlas Copco Canada Inc. | Core barrel valve assembly |
CN104067043A (en) * | 2012-01-27 | 2014-09-24 | 阿特拉斯·科普柯加拿大有限公司 | Core barrel valve assembly |
CN112377128A (en) * | 2020-11-11 | 2021-02-19 | 中国地质科学院地质力学研究所 | Locator is retrieved with freedom in installation of drilling stressmeter |
Also Published As
Publication number | Publication date |
---|---|
PE20060705A1 (en) | 2006-08-03 |
WO2006058363A1 (en) | 2006-06-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHELLJET PTY LIMITED, AUSTRALIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ANDERSON, LESLIE MICHAEL;REEL/FRAME:018838/0416 Effective date: 20060802 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |