AU621767B2 - Creation of Inventions and Patents with Artificial Intelligence

AU621767B2 – Packer locking apparatus
– Google Patents

AU621767B2 – Packer locking apparatus
– Google Patents
Packer locking apparatus

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Publication number
AU621767B2

AU621767B2
AU59165/90A
AU5916590A
AU621767B2
AU 621767 B2
AU621767 B2
AU 621767B2
AU 59165/90 A
AU59165/90 A
AU 59165/90A
AU 5916590 A
AU5916590 A
AU 5916590A
AU 621767 B2
AU621767 B2
AU 621767B2
Authority
AU
Australia
Prior art keywords
packer
sleeve
mandrel
locking member
lug
Prior art date
1990-02-05
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.)

Ceased

Application number
AU59165/90A
Other versions

AU5916590A
(en

Inventor
Timothy Donald Burns Sr.
Kenneth Dale Caskey
Donald Wayne Winslow
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.)

Halliburton Co

Original Assignee
Halliburton Co
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.)
1990-02-05
Filing date
1990-07-20
Publication date
1992-03-19

1990-07-20
Application filed by Halliburton Co
filed
Critical
Halliburton Co

1991-08-08
Publication of AU5916590A
publication
Critical
patent/AU5916590A/en

1992-03-19
Application granted
granted
Critical

1992-03-19
Publication of AU621767B2
publication
Critical
patent/AU621767B2/en

2010-07-20
Anticipated expiration
legal-status
Critical

Status
Ceased
legal-status
Critical
Current

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Classifications

E—FIXED CONSTRUCTIONS

E21—EARTH DRILLING; MINING

E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells

E—FIXED CONSTRUCTIONS

E21—EARTH DRILLING; MINING

E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells

E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like

E—FIXED CONSTRUCTIONS

E21—EARTH DRILLING; MINING

E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells

E21B23/06—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for setting packers

E—FIXED CONSTRUCTIONS

E21—EARTH DRILLING; MINING

E21B—EARTH DRILLING, e.g. DEEP 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

E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing

E21B33/1291—Packers; Plugs with mechanical slips for hooking into the casing anchor set by wedge or cam in combination with frictional effect, using so-called drag-blocks

Description

DECLARED AT No Legalization No Corporate Sea] this 18th Houston, Texas day of July 19
U.S.A.
inature of Declarpnt Maer, Vice President International Operations Halliburton Services Division To: The Commissioner of Patents.
7I7~~1
AUSTRALIA
PATENTS ACT 1952 COMAPLETE SPECIFICAION
(ORIGINLAL)
FOR OFFICE !TSE K’ 19 Form 767 Short Title: Int. Cl: Application Number: Lodged: ompet Specification Lodged: Accepted: Lapsed: Pu~blished: Priority: b ‘Rdlated Art: 0 o TO BE COMPLETED) BY APPLICANT Name of Applicant HALLIBURTON COMPANY Address of Applicant: P.O. Box 1431, Duncan, Oklahoma 73536, United States of America.
Actual Inventors: Timothy Donald Burns Sr., Kenneth Dale Caskey, and Donald Wayne Winslow Address for Service: CALLINA1N LAWRIE, 278 High Street, Kew, 3101, Victoria, Australia Complete Spccification for the invention er “itled: “PACKER LOCKING APPARATUS” The following statement is a full description of this invention, including the best method of performing it known to me:la PACKER LOCKING APPARATUS Background Of The Invention 1. Field Of The Invention The present invention relates to locking apparatus for downhole packers, and more particularly, to a locking apparatus which prevents premature setting of a packer by longitudinal movement of an actuating mandrel in the packer with respect to the packer elements.
2. Description Of The Prior Art The use of packers to close off portions of a well bore 0 0 is well known. Many of these packers are actuated into a 0 0 C0o set position by manipulation of the tool string. One such 0 packer is the Halliburton Services Champ@ III packer which o s is a multip]e purpose retrievable packer designed for 00 o°o testing, treating and squeezing. The packer is set by turning the tool string to the right and setting down weight. The packer includes elastomeric packer elements aoo0 which are squeezed outwardly into sealing engagement with 0 )0 .a o. 0 the well casing by movement of an actuating mandrel con- ~g nected to the tool string. Pressure applied below the packer forces hydraulic slips against the casing to prevent the packer from being pumped up the hole. A straight upward 0 40a o 01 oo0 o pull releases the packer. A similar packer is the Halliburton RTTS (Retrievable Test-Treat-Squeeze) packer.
When either of these packers is run into the well bore, the mandrel is held in the run-in position by interaction of a lug on the mandrel with a J-slot. Such an arrangement works well with normal, relatively undeviated well bores.
7~P—Yi .ilr_- IIX_ -2- 0 oo 00 0 0oo o o oo ao o oo0 aOuoo O a 0 a 0 0 oPo oO O a a 000 000 a a a 4 4 taO 00 00 aa1 4 0 at However, when such packers are used in highly deviated sections of a well bore, dragging forces on the tool string resulting from contact thereof with the well bore may be enough to cause the mandrel to be prematurely actuated in the J-slot so that the packer elements are squeezed out towards their sealing position. When this occurs, the packer elements may be split because of squeezing forces on them or they may be damaged by contact with the well bore.
This damage to the packer elements may not become known until an attempt is made to set the packer, after which it is necessary to remove the tool string and replace the packer elements. Obviously, this can result in significant lost rig time. Therefore, there is a need for an apparatus to prevent such premature setting of packers.
Summary Of The Invention The present invention meets the need previously described by providing a locking apparatus which holds the actuating mandrel of the packer in its run-in position relative to the outer portion of the packer including the packer elements. The packer may not be set until the locking apparatus is unlocked at a predetermined position in the well bore, such as when it enters the well liner.
The packer locking apparatus of the present invention generally comprises a sleeve connectable to an outer portion of the packer, mandrel means disposed in the sleeve for connecting to an actuating nmandrel of the packer, a lock or locking member having a portion adjacent to the sleeve, a r t
C
B
b t’ 9″ -3lug extending from one of the sleeve and locking member, lug receiving means on the other of the sleeve and locking B member for receiving the lug therein when in a locked position such that relative longitudinal movement between the mandrel means and the sleeve is prevented, and lock disengaging means for disengaging the lug from the lug receiving means at a predetermined position in the well bore, thereby allowing relative longitudinal movement between the mandrel means and the sleeve. The locking member is longitudinally and rotatably fixed relative to the 0 0 4 o 00 mandrel means, but may move radially with respect to the o0.o mandrel means and the sleeve.
0 o o In the preferred embodiment, the sleeve forms a portion 00 o 00 of a drag block assembly on the packer, and the mandrel means is characterized by a lower mandrel attached to the actuating mandrel and essentially becoming part of the 00oo0 ,0 actuating mandrel of the packer.
0o The lug receiving means is preferably characterized by a groove into which the lug extends when the apparatus is in a locked position. In one embodiment, the groove is in the sleeve, and the lug extends radially outwardly from the 0 locking member. However, the apparatus would also work if the groove were in the locking member and the lug extended radially inwardly from the sleeve into the groove.
The lock disengaging means is adapted for actuation by contact with a liner in the well bore. In the preferred embodiment, the lock disengaging means is characterized by a b -4radially outwardly extending portion of the locking member.
Contact by this outwardly extending portion with the liner will force the locking member radially inwardly to disengage the lug and lug receiving means, thus placing the apparatus in an unlocked position. Biasing means may be provided for biasing the locking member radially outwardly with respect to the mandrel means toward the locked position.
The present invention may also be said to include a downhole tool for use in a well bore comprising a packer with an outer portion having packer elements thereon and a mandrel disposed in the outer portion and attachable to a tool string, a drag block assembly connected to a lower end of the packer, generally forming a portion thereof, and further comprising J-slot means for allowing setting of the packer elements. The setting is accomplished by longitudinally raising the mandrel, rotating the mandrel with respect .O 4 to the outer portion, and longitudinally lowering the mandrel such that the packer elements are set into sealing engagement with the well bore. The downhole tool also comprises a sleeve forming a lower portion of the drag block assembly and a lock disposed adjacent to a lower end of the mandrel and at least partially extending into a lower end of the sleeve, wherein one of the sleeve and the lock has a lug extending therefrom and the other of the sleeve and lock defines a groove for receiving the lug therein such that the longitudinal movement of the mandrel required for setting of the packer elements is prevented until the apparatus is at a
V
I’
ii 0 4 a o t o4 f 0 4 S0 0 4 o a Q 09 0 44 0 00 0 0 6 predetermined position in the well bore. The downhole tool further comprises means for disengaging the lug and groove such that the longitudinal movement required for setting the packer is possible at this predetermine position.
It is an important object of the present invention to provide a locking apparatus for preventing premature setting of a packer in a well bore.
Another object of the invention is to provide an apparatus for locking a packer actuating mandrel with respect to an outer portion of the packer until the locking apparatus is at a predetermined position in a well bore.
Additional objects and advantages of the invention will become apparent as the following detailed description of the preferred embodiment is read in conjunction with the drawings which illustrate such preferred embodiment.
Brief Description Of The Drawings FIG. 1 illustrates the packer locking apparatus of the present invention as it is positioned in a deviated well bore with a packer at the end of a tool string.
FIGS. 2A and 2B schematically illustrate a typical packer with the oacker locking apparatus of the present invention co’ ,cted thereto.
FIGS. 3A and 3B show details of the packer locking apparatus of the present invention.
FIG. 4 is a view of a J-slot taken along lines 4-4 in FIG. 3A.
(00 0 04 ‘t” -6- Description Of The Preferred Embodiment Referring now to the drawings, and more particularly to FIG. 1, the packer locking apparatus of the present invention is shown and generally designated by the numeral Locking apparatus 10 is disposed adjacent to the lower end 12 of a packer 14 which is of a kind known in the art.
Packer 14 is connected to a tool string 16, and as illustrated in FIG. 1, the entire tool string is positioned in a deviated well bore 18. Well bore 18 is typically defined by a casing 20 and a relatively smaller diameter liner 22 is disposed in well bore 18 at a predetermined location.
Packer 14, as already noted, is of a kind known in the I, art, but a general description of the operation of the packer will be presented before discussing the details of packer locking apparatus 10. Referring now to FIGS. 2A and 2B, a typical packer 14 is illustrated with locking apparar, Zus 10 disposed therebelow. The specific packer 14 shown is the Halliburton Services Champs III packer. Packer 14 includes an inner, actuating mandrel 24 which is connected to tool string 16. Mandrel 24 is disposed in an outer por- 0 tion of packer 14, generally designated by the numeral 26.
Outer portion 26 includes elastomeric packer elements 28 and slips 30. Forming part of lower end 12 of packer 14 is a drag block assembly 32. A J-slot lug 34 extends from a lower portion of mandrel assembly 24 into a J-slot 36 in drag block assembly 32 thus providing a J-slot means.
-7- In a normal well bore, as tool string 16 is lowered into the well bore, the engagement of drag block assembly 32 with the well bore prevents premature actuation of the J-slot mechanism. Once packer 14 is in the desired position, the J-slot means may be actuated by lifting on tool string 16 and rotating to the right to move lug 34 within J-slot 36.
At this point, weight can be set down on tool string 16, and mandrel 24 is free to move longitudinally downwardly with respect to outer portion 26 of packer 14. As this downward movement occurs, packer elements 28 are squeezed radially outwardly into sealing engagement with the well casing, and 4 -slips 30 are moved outwardly to grippingly engage the well 11 casing. In the event that pressure builds up below packer 14, hydraulic slips 38 prevent the packer from being pumped up the well bore.
Packer 14 is released by a straight upward pull on tool o string 16 which move3 mandrel 24 longitudinally upwardly 0 within outer portion 26. When this occurs, slips 30 are S’ released, and packer elements 28 are disengaged from the well bore. Also, pressure is released from hydraulic slips 38.
a 4 A problem may arise when running such a packer 14 into a highly deviated well bore. Dragging of the tool string on the well bore, such as at point 39 in FIG. i, may cause mandrel 24 to be moved relatively upwardly and rotated with respect to drag block assembly 32 sufficiently to result in premature actuation of the mechanism of the J-slot means.
I -8- If such premature actuation occurs, subsequent downward load on tool string 16 will cause packer elements 28 to be prema- Sturely squeezed outwardly. The squeezing may actually rupture the packer elements, or the packer elements may be damaged by dragging along the well bore. In addition, premature actuation of slips 30 may cause damage to the slips or result in the tool string jamming in the well bore.
j Referring now to FIGS. 3A and 3B, the details of packer locking apparatus 10 and drag block assembly 32 will be discussed.
Drag block assembly 32 is attached to the main portion 00oo of packer 14 by collar 40 which engages a groove 42 in the upper end of drag block sleeve 44. Sleeve 44 defines a 0 plurality of elongated openings 46 therein, and a drag block 48 is disposed in each opening 46. Upper and lower drag block keepers 50 and 52 retain drag blocks 48 in the 0.0. corresponding openings 46. Lower drag block keeper 52 is 41 held in place by a bolt 54. A biasing means, such as a set of springs 56, biases each drag block 48 radially outwardly from outwardly facing surface 58 on drag block sleeve 44.
It will be seen in FIG. 3A that the drag blocks 48 extend outwardly from openings 46 and thus radially outwardly with respect to packer 14.
J-slot 36 is defined in inner bore 60 of drag block sleeve 44 of drag block assembly 32. J-slot lug 34 extends radially outwardly from a mandrel means, such as lower mandrel 62, which is attached to the lower end of packer -9actuating mandrel assembly 24. It may also be said that lower mandrel 62 is a portion of actuating mandrel assembly 24.
Referring now also to FIG. 4, the configuration of Jslot 36 is shown. J-slot 36 includes a short leg 64 and a long leg 66 which extends downwardly. An angled transition portion 68 interconnects short leg 64 and long leg 66. When the tool string is run into well bore 18, lug 34 is positioned in the bottom of short leg 64 of J–slot 36 as shown in FIG. 4. As will be further explained hereinafter, packer locking apparatus 10 holds lug 34 in this position so that packer 14 cannot be prematurely actuated.
It Referring again to FIGS. 3A and 3B, a locking sleeve 0a is attached to the lower end of drag block sleeve 44 at threaded connection 72. Locking sleeve 70 and drag block sleeve 44 are preferably fixedly connected by a means known in the art such as a weld 74.
*a a 4 a 4 aLocking sleeve 70 has a first bore 76 and a larger second bore 78, and a downwardly facing annular shoulder 84 interconnects the two bores. The length of locking sleeve may vary depending upon the stroke necessary to actuate packer 14 into its set position.
At the lower end of locking sleeve 70, an annular groove 82 is defined in second bore 78 thereof. Below groove 82 a downwardly facing chamfer 84 is cut into second bore 78.
An upper portion 86 of a lock or locking member 88 extends at least partially into second bore 78 of locking
I
io sleeve 70. A radially outwardly extending lug 90 has a chamfer 91 on the upper edge thereof and extends from outer surface 92 of locking member 88. When in the locked position shown in FIG. 3A, the lug extends into groove 82.
Locking member 88 has an inner surface 94 which is spaced radially outwardly from outer surface 96 of lower mandrel 62 such that a gap 98 is defined therebetween.
A pin 100 is attached to lower mandrel 62 at threaded connection 102 and extends radially outwardly therefrom.
Pin 100 is slidably disposed in a hole 104 in upper portion S 86 of locking member 88.
Similarly, another pin 106 is connected to lower mandrel “0 62 at threaded connection 108 and extends radially outwardly 00 ,0 from outer surface 110 of the lower mandrel. Pin 106 is slidably disposed in a hole 112 in a lower portion 114 of locking member 88.
o.O. Lower portion 114 is spaced radially outwardly from outer surface 110 of lower mandrel 62 such that a gap 116 is defined therebetween. It will be seen that gap 116 is substantially similar to gap 98 adjacent to upper portion 86.
It will also be seen that pins 100 and 106 provide a means for preventing relative longitudinal and rotational movement between locking member 88 and lower mandrel 62.
However, the pins also proi de a means for allowing locking member 88 to be free to move radially with respect to lower mandrel 62. Such movement is guided by pins 100 and 106.
p 1* -11- Preferably, a plurality of locking members 88 are circumferentially positioned around lower mandrel 62. Upper portions 86 of locking members 88 extend through and are contained by bore 117 in a lock retainer ring 118. Lock retainer 118 has a plurality of holes 120 which are substantially aligned with holes 104 in locking members 88 and receive a radially outer end of pins 100 therethrough. It will be seen that lock retainer ring 118 limits the radially outward movement of locking members 88. The radially outward movement of locking members 88 may also limited by contact of outer surface 122 of upper portion 86 with second bBJO bore 78 of locking ring A lock cap 124 is attached to the lower end of lower adapter 62 at threaded connection 126. A sealing means, such as O-ring 128, provides sealing engagement between lock cap 124 and lower mandrel 62. The lower end of lock cap 124 Jo has an externally threaded portion 130 for connection to a o lower tool string portion 131 if desired.
Lock cap 124 defines a bore 132 therein, and lower portions 114 of locking members 88 extend into bore 132.
o~Radially outward movement of locking members 88 is limited at their lower ends by engagement of outer surface 134 of 4 a each lower portion 114 with bore 132 in lock cap 124.
Between upper portion 86 and lower portion 114, each locking member 88 has an enlarged, radially outwardly extending intermediate portion 136 which is similar to a drag block member. Intermediate portion 136 has a notch 138 -12therein, and a raised portion 140 of lower mandrel 62 v extends into each notch 138. Raised portion 140 defines a plurality of circumzerentially spaced longitudinal slots 142, each slot being generally aligned with notch 138 of a locking member 88. A biasing means, such as a set of springs 144, is disposed in each slot 142 and contacts notch 138 of intermediate portion 136 to radially outwardly bias j locking members 88 toward their radially outwardmost position shown in FIG. 3B.
Operation Of The Invention i As tool string 16 is lowered into well bore 18, as shown in FIG. 1, the position of packer 14 will be as shown in i T IG. 2A, and locking apparatus 10 will be in the locked position shown in FIGS. 3A anC 3B. As previously discussed, 4i dragging of tool string 16 on well bore 18 such as at point 39 illustrated in FIG. 1, may have a tendency to cause packer 14 to be prematurely actuated if locking apparatus Sis not present. However, locking apparatus 10 prevents relative longitudinal movement of lower mandrel 62 with respect to drag block assembly 32, and thus prevents relative longitudinal movement of lug 34 in short leg 64 of Jslot 36 as hereinafter described.
In the run-in, locked position, locking members 88 are in their radially outwardmost position shown in FIG. 3B in which lugs 90 are engaged with groove 82 in locking sleeve Because locking sleeve 70 is fixedly attached to drag block sleeve 42 and locking members 88 are longitudinally ii, Yl i
‘A
-13o 00 t o Q 0 o o 0 00 0 0 o a 0 0 0 00 a 0 00 0 0 0 00 0 fixed with respect to lower mandrel 62 by pins 100 and 106, :t will be seen that the engagement of lugs 90 with groove 82 prevent relative longitudinal movement of lower mandrel 62 with respect to drag block assembly 12. Of course, this results in prevention of relative longitudinal movement of actuating mandrel 24 with respect to outer portion 26 of packer 14, including drag block assembly 32. Thus, regardless of any dragging of tool string 16 on the wall of deviated well bore 18, locking apparatus 10 prevents premature actuation of packer 14.
As tool string 16 is run into well bore 18, shoulder in locking sleeve 70 engages upper end 48 of each locking member 88. In this way, any force transmitted from locking sleeve 70 to locking members 88 is not absorbed by lugs in groove 82.
When locking apparatus 10 enters liner 22 at a predetermined position in the well bore 18, inner bore 150 of liner 22 is engaged by outer surface 152 of intermediate portions 136 of locking members 88. Locking members 88 and bore 150 are sized such that this engagement will cauise locking members 88 to be moved radially inwardly with respect to lower mandrel 62 such that gaps 98 and 116 are reduced and lugs are disengaged from groove 82. That is, an outer end 154 of each lug 90 is spaced radially inwardly from second bore 78 of locking sleeve 70. Thus, the apparatus is in an unlocked position.
Once this unlocking operation occurs, it will be seen 0o000 0 0 a O 0 1 44 0 t I 01 4. II _1 1; i
I
-14that the J-slot means may be actuated and lower mandrel 62 moved longitudinally with respect to drag block assembly 32.
In other words, packer 14 may be set by lifting on tool string 16 which raises J-slot lug 34 in short leg 64 of Jslot 36. As this occurs, it will be seen that a portion of upper portion 86 of each locking member 88 will be moved up into first bore 76 of locking sleeve 70. By rotating tool string 16 to the right, lug 34 will be moved through transition portion 68 of J-slot 36 and aligned with long leg 66.
S By setting down weight on the tool string, J-slot lug 34 Oa a o oo will move downwardly through long leg 66 of J-slot 36 which allows relative downward movement of actuating mandrel 24 within outer portion 26 of packer 14 so that the packer is oo 0 00 o g. set in the manner hereinbefore described.
All of the components of locking apparatus 10 with the exception of locking sleeve 70, move with lower mandrel 62.
0oooi When packer 14 is released by raising tool string 16, a locking members 88 will be moved upwardly toward locking sleeve 70. As upper portions 86 of looking members 88 are moved adjacent to the lower end of locking sleeve 70, chamfers 91 on lugs 90 will contact chamfer 84 in the locking sleeve. This will force locking members 88 radially inwardly. Upward movement of locking members 88 is limited by the engagement of upper end 148 with shoulder 80 in locking sleeve 70, at which point, lugs 90 will be once again aligned with groove 82.
As the tool string is raised out of well bore 18, inter- -4 1 if mediate portions 136 of locking members 88 are moved out of engagement with bore 150 in liner 22. Thus, as locking apparatus 10 exits liner 22, locking members 88 will be pushed radially outwardly to their locked position by springs 144. At this point, lugs 90 re-engage groove 82 and packer 114 is again locked against undesired actuation.
It will be seen, therefore, that the packer locking apparatus of the present invention is well adapted to carry out the ends and advantages mentioned as well as those inherent therein. While a presently preferred embodiment of the invention has been shown for the purposes of this disclosure, numerous changes in the arrangement and construction of parts may be made by those skilled in the art. All such changes are encompassed within the scope and spirit of the appended claims.
g a t i

Claims (7)

1. An apparattis tor iocKing a packer in a run-in posi- tion and preventing premature actuation of the packer in a well bore, said apparatus comprising: a sleeve connectable to an outer portion of said packer; mandrel means disposed in said sleeve for con- necting to an actuating mandrel of said packer; a locking member having a portion adjacent to said sleeve, said locking member being longitudinally and rota- S tably fixed with respect to said mandrel means; a lug extending from one of said sleeve and locking member; lug receiving means on the other of said sleeve and locking member for receiving said lug therein when in a Slocked position such that relative longitudinal movement Ibetween said mandrel means and said sleeve is prevented; and lock disengaging means for disengaging said lug from said lug receiving means at a predetermined position in said well bore, thereby allowing relative longitudinal move- ment between said mandrel means and said sleeve.

2. The apparatus of claim 1 wherein said sleeve forms a portion of a drag block assembly on said packer.

3. The apparatus of claim 1 whereid said lug receiving means is characterized by a groove defined in said other of said sleeve and said locking member. i| lcke postio suh tht rlatve lngiudial mvemnt I t C 1 (I 17

4. The apparatus of claim 3 wherein: said groove is in said sleeve; and said lug extends radially outwardly from said locking member.

The apparatus of claim 1 wherein said lock disengaging means is adapted for actuation by contact with a liner in said well bore.

6. The apparatus of claim 1 wherein said lock disengaging means is characterized by a radially outwardly extending portion of said locking member.

7. The apparatus of claim 1 further comprising biasing means for biasing said locking member radially outwardly with respect to said mandrel means. D A T E D this 20th day of July, 1990. HALLIBURTON COMPANY By their Patent Attorneys: CALLINAN LAWRIE f/ j .j i I k 4 i

AU59165/90A
1990-02-05
1990-07-20
Packer locking apparatus

Ceased

AU621767B2
(en)

Applications Claiming Priority (2)

Application Number
Priority Date
Filing Date
Title

US475614

1990-02-05

US07/475,614

US4989672A
(en)

1990-02-05
1990-02-05
Packer locking apparatus

Publications (2)

Publication Number
Publication Date

AU5916590A

AU5916590A
(en)

1991-08-08

AU621767B2
true

AU621767B2
(en)

1992-03-19

Family
ID=23888369
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

AU59165/90A
Ceased

AU621767B2
(en)

1990-02-05
1990-07-20
Packer locking apparatus

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US
(1)

US4989672A
(en)

EP
(1)

EP0441021B1
(en)

AU
(1)

AU621767B2
(en)

BR
(1)

BR9004022A
(en)

CA
(1)

CA2023151C
(en)

DE
(1)

DE69017886T2
(en)

DK
(1)

DK0441021T3
(en)

NO
(1)

NO903555L
(en)

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(en)

1992-10-16
1994-06-14
Schlumberger Technology Corporation
Locking apparatus for locking a packer setting apparatus and preventing the packer from setting until a predetermined annulus pressure is produced

US5579840A
(en)

1994-10-05
1996-12-03
Dresser Industries, Inc.
Packer running and setting tool

US5687795A
(en)

1995-12-14
1997-11-18
Schlumberger Technology Corporation
Packer locking apparatus including a time delay apparatus for locking a packer against premature setting when entering a liner in a wellbore

US20080202766A1
(en)

2007-02-23
2008-08-28
Matt Howell
Pressure Activated Locking Slot Assembly

US8869886B2
(en)

2011-07-28
2014-10-28
Halliburton Energy Services, Inc.
Method to restrict the number of cycles in a continuous j-slot in a downhole tool

BR112014019422A8
(en)

2012-03-06
2017-07-11
Halliburton Energy Services Inc

METHOD FOR RELEASING A SAFETY GASKET IN AN UNDERGROUND WELL, AND, SAFETY GASKET

US8550173B2
(en)

2012-03-06
2013-10-08
Halliburton Energy Services, Inc.
Locking safety joint for use in a subterranean well

US8783370B2
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2012-03-06
2014-07-22
Halliburton Energy Services, Inc.
Deactivation of packer with safety joint

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2018-06-13
2023-03-07
Halliburton Energy Services, Inc.
Setting mechanical barriers in a single run

US11448024B2
(en)

2021-01-14
2022-09-20
Halliburton Energy Services. Inc.
Retrievable packer with delayed setting

CN113445958B
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2021-05-26
2023-04-11
中国海洋石油集团有限公司
Compression packer

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Retrievable well packer

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not_active
Expired – Lifetime

1990-07-20
AU
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not_active
Ceased

1990-07-24
DK
DK90308063.8T
patent/DK0441021T3/en
active

1990-07-24
DE
DE69017886T
patent/DE69017886T2/en
not_active
Expired – Fee Related

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EP
EP90308063A
patent/EP0441021B1/en
not_active
Expired – Lifetime

1990-08-13
CA
CA002023151A
patent/CA2023151C/en
not_active
Expired – Fee Related

1990-08-14
NO
NO90903555A
patent/NO903555L/en
unknown

1990-08-14
BR
BR909004022A
patent/BR9004022A/en
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Also Published As

Publication number
Publication date

EP0441021B1
(en)

1995-03-15

NO903555L
(en)

1991-08-06

AU5916590A
(en)

1991-08-08

US4989672A
(en)

1991-02-05

DK0441021T3
(en)

1995-04-03

CA2023151A1
(en)

1991-08-06

NO903555D0
(en)

1990-08-14

DE69017886T2
(en)

1995-09-07

EP0441021A1
(en)

1991-08-14

BR9004022A
(en)

1991-11-12

DE69017886D1
(en)

1995-04-20

CA2023151C
(en)

1995-07-18

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