CA1222447A - Deviation hole plug - Google Patents
Deviation hole plugInfo
- Publication number
- CA1222447A CA1222447A CA000490640A CA490640A CA1222447A CA 1222447 A CA1222447 A CA 1222447A CA 000490640 A CA000490640 A CA 000490640A CA 490640 A CA490640 A CA 490640A CA 1222447 A CA1222447 A CA 1222447A
- Authority
- CA
- Canada
- Prior art keywords
- wings
- thickness
- base portion
- plug
- distal ends
- 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.)
- Expired
Links
- 239000007787 solid Substances 0.000 claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229940000425 combination drug Drugs 0.000 claims 1
- 238000004880 explosion Methods 0.000 abstract description 6
- 239000002360 explosive Substances 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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)
- Geophysics And Detection Of Objects (AREA)
Abstract
DEVIATION HOLE PLUG
ABSTRACT OF THE DISCLOSURE
Prior art devices all include central apertures formed in the flat central portions with flexible fingers radiating from the centre portion. The wings or fingers are not strong enough to maintain the plug in position against the force of seismic explosions, the force of which is absorbed by the flat base and the apertures often give way when the plug is forced down the hole by the conven-tionally used pole. Furthermore, when back filling the plugs, soil and the like often sifts down through the hole.
The present device includes ribbed wings for strength and a cone-shaped solid base to facilitate positioning and to absorb and deflect explosive forces.
ABSTRACT OF THE DISCLOSURE
Prior art devices all include central apertures formed in the flat central portions with flexible fingers radiating from the centre portion. The wings or fingers are not strong enough to maintain the plug in position against the force of seismic explosions, the force of which is absorbed by the flat base and the apertures often give way when the plug is forced down the hole by the conven-tionally used pole. Furthermore, when back filling the plugs, soil and the like often sifts down through the hole.
The present device includes ribbed wings for strength and a cone-shaped solid base to facilitate positioning and to absorb and deflect explosive forces.
Description
2~
DEVIATION HOLE PLUG
BACKGROUND OF THE INVENTION
The presen-t device includes ribbed wings for strength and a cone-shaped solid base to facilitate posi-tioning and to absorb and deflect explosive forces.
The present invention relates to new and useful improvements in deviation hole plugs, which are plugs used approxi~ately two feet down the hole in order to plug off the hole when seismic explosions are fired, it being understood that soil or the like is then placed in the upper two feet of the hole above the plug.
With prior art devices, the energy produced by the explosive locat~d in the bottom of the test hole often forces the hole plug out of the hole primarily because the wings or flanges of prior art devices that engage the side walls of the test hole, are not constructed so as to secure the hole plug in position.
Furthermore, the bottom of the hole plugs in conventional construction is ~lat or planar so that the hole plug itself must absorb the energy produced by the explosive which once again displaces the hole plug.
Such hole plugs are usually inserted by means .. . ~'~
J ~:224~L7 of a loading pole which is engaged within the flat base and is often forced through the base due to the central aper-ture provided therein thus rendering it unuseable.
Conventional hole plugs do not enter the test hole vertically due to the awkward shape thereof and often, poor materials result in breakage when outside tempera-tures exceed -20 C.
SUMMARY OF THE INVENTION
. .
The present invention overcomes all of these disadvantages by providing a conical shaped hole plug with a substantially reinforced base with no aperture therein and ribbed reinforcing for the base as well as for the radially extending wings.
One aspect of the invention is to provide a devia-tion hole plug comprising in combination a reinforced cone-shaped, solid central base portion, a plurality of spaced apart wings extending radially upwardly and out-wardly from the upper edge of said central base portion and a longitudinally extending, centrally located rein-forcing rib formed on the underside of each wing.
Another aspect of the invention is to provide a deviation hole plug for plugging holes for seismic test purposes, said plug being formed from a plastics material and being circular in configuration when viewed in plan and cone-shaped in configuration when viewed in side ele-vation, the improvement comprising a solid central cone-shaped central base portion, a plurality of spaced apart wings extending radially upwardly and outwardly from the upper edge of said central base portion and a longitudi-nally extending, centrally located reinforcing rib formed on the underside of each wing.
A further advantage of the invention is the ribbed wings which provide additional strength and the S-shape of the wing when it engages the side wall, ensures that the hole plug remains in the hole.
The pointed cone shape makes it possible to divert the energy produced by the explosive, into the wall of the test hole rather than absorbing it fully.
Due to the extra reinforcing at the point where the loading pole contacts the deviator hole plug, the problem of forcing the loading pole through the hole plug is no longer encountered and the relatively long cone shape of the plug ensures vertical installation.
Another advantage of the invention is to provide a device of the character herewithin described which is simple in construction, economical in manufacture and otherwise well suited to the purpose ~or which it is de-signed.
~'~2~
With the foregoing in view, and other advantages as will become apparent to those skilled in the art to which this invention relates as this specification pro-ceeds, the invention is herein described by reference to the acco~panying drawings forming a part hereGf, which includes a description of the preferred typical embodiment of the principles of the present invention, in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a plan view of one of the prior art devices.
Figure 2 is a plan view of another of the prior art devices.
Figure 3 is a side elevation of the invention shown in vertical section.
Figure 4 is an underside plan view of Figure
DEVIATION HOLE PLUG
BACKGROUND OF THE INVENTION
The presen-t device includes ribbed wings for strength and a cone-shaped solid base to facilitate posi-tioning and to absorb and deflect explosive forces.
The present invention relates to new and useful improvements in deviation hole plugs, which are plugs used approxi~ately two feet down the hole in order to plug off the hole when seismic explosions are fired, it being understood that soil or the like is then placed in the upper two feet of the hole above the plug.
With prior art devices, the energy produced by the explosive locat~d in the bottom of the test hole often forces the hole plug out of the hole primarily because the wings or flanges of prior art devices that engage the side walls of the test hole, are not constructed so as to secure the hole plug in position.
Furthermore, the bottom of the hole plugs in conventional construction is ~lat or planar so that the hole plug itself must absorb the energy produced by the explosive which once again displaces the hole plug.
Such hole plugs are usually inserted by means .. . ~'~
J ~:224~L7 of a loading pole which is engaged within the flat base and is often forced through the base due to the central aper-ture provided therein thus rendering it unuseable.
Conventional hole plugs do not enter the test hole vertically due to the awkward shape thereof and often, poor materials result in breakage when outside tempera-tures exceed -20 C.
SUMMARY OF THE INVENTION
. .
The present invention overcomes all of these disadvantages by providing a conical shaped hole plug with a substantially reinforced base with no aperture therein and ribbed reinforcing for the base as well as for the radially extending wings.
One aspect of the invention is to provide a devia-tion hole plug comprising in combination a reinforced cone-shaped, solid central base portion, a plurality of spaced apart wings extending radially upwardly and out-wardly from the upper edge of said central base portion and a longitudinally extending, centrally located rein-forcing rib formed on the underside of each wing.
Another aspect of the invention is to provide a deviation hole plug for plugging holes for seismic test purposes, said plug being formed from a plastics material and being circular in configuration when viewed in plan and cone-shaped in configuration when viewed in side ele-vation, the improvement comprising a solid central cone-shaped central base portion, a plurality of spaced apart wings extending radially upwardly and outwardly from the upper edge of said central base portion and a longitudi-nally extending, centrally located reinforcing rib formed on the underside of each wing.
A further advantage of the invention is the ribbed wings which provide additional strength and the S-shape of the wing when it engages the side wall, ensures that the hole plug remains in the hole.
The pointed cone shape makes it possible to divert the energy produced by the explosive, into the wall of the test hole rather than absorbing it fully.
Due to the extra reinforcing at the point where the loading pole contacts the deviator hole plug, the problem of forcing the loading pole through the hole plug is no longer encountered and the relatively long cone shape of the plug ensures vertical installation.
Another advantage of the invention is to provide a device of the character herewithin described which is simple in construction, economical in manufacture and otherwise well suited to the purpose ~or which it is de-signed.
~'~2~
With the foregoing in view, and other advantages as will become apparent to those skilled in the art to which this invention relates as this specification pro-ceeds, the invention is herein described by reference to the acco~panying drawings forming a part hereGf, which includes a description of the preferred typical embodiment of the principles of the present invention, in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a plan view of one of the prior art devices.
Figure 2 is a plan view of another of the prior art devices.
Figure 3 is a side elevation of the invention shown in vertical section.
Figure 4 is an underside plan view of Figure
3.
Figure 5 is a top plan view of Figure 3.
Figure 6 is a fragmentary isometric view of one end of the invention.
In the drawings like characters of reference indi-cate corresponding parts in the different figures.
DETAILED DESCRIPTION
Proceeding therefore to describe the invention in detail, reference should first be made to Figures 1 ~222~4~
and 2 which show prior art devices.
In Figure 1, a central base 10 is provided with a central aperture 11 and a plurality of wings 12 extend-ing radially from the perime-ter of the base with the dis-tal ends 13 being wider than the inner ends 14.
This not only weakens the wing attachment point, but also provides a planar base which is apertured and which not only permits the loading pole to be driven the-rethrough under certain circumstances, but also absorbs the ~ull force of the explosion from the bottom of the hole.
Figure 2 also includes a planar base 15 with a cone-shaped wall 16 extending upwardly therefrom and an outer flange 17 cut into segments by radial slits 18 form-ed therethrough. Once again, the planar base absorbs the force of the explosion and the relatively large aper-ture in the centre often results in the loading pole being forced therethrough.
The presen-t invention, which is illustrated in Figures 3 through 7, overcomes these disadvantages. It is preferably made from a plastics material such as Dupont (Sclair 2107) polyethylene although other plastics can be utilized.
It consists of a reinforced cone-shaped solid central base portion 19 formed with a relatively pointed lower end 20 and formed from the aforementioned plastic material or ~e equivalent and it will be noted that the thickness of this material increases as it approaches the pointed end 20 and that, furthermore, it is provided with a plurality of radially extending ribs 21 formed on the inner surface thereof as clearly shown in Figures 3 and 5.
Extending radially outwardly and upwardly from the upper edge 22 is a plurality of spaced apart fingers 23 which are formed integrally with the base and decrease in width from the point of connection 24 to the distal ends 25 which are curved.
It will also be noted that the thickness of these wings decreases from the base 24 to the ends 25 and that a reinforcing rib 26 is formed on the undersurface 27 and extends longitudinally from a point 23 on the outer surface of the conical base decreasing to 0 at the upper end 25 of each finger.
It will also be observed, from a perusal of Figure 3, that the angle of inclination of the wings along the longitudinal axis 29 thereof, is greater relative to the vertical axis 30 of the plug than the angle of inclination of the base portion 19 indicated by reference character 2~7 31 all of which reinforces the strength of the device and facilitates the efficient operation thereof while it is inserted.
When inserted by a conventional loading pole/
the edge-sharpened ends 25 engage the sides of the hole and cuts into the wall thus providing superior anchora~e and as upward pressure is applied due to the force of the explosion, these extremities bend or curve as the plug is moved initially upwardly slightly thus giving an S configuration, further deflection being resisted by the reinforcing ribs 26 on the underside of the wings.
The fact that the base of the device is solid without any central aperture, prevents earth fill from seeping through the plug and also eliminates any danger of the loading pole being forced downwardly through the base thus destroying the plug.
The pointed cone-shaped lower end 20 of the base disperses the energy caused by the explosion and any ener-gy that is applied to the underside of the plug causes the further engagement of the upper ends of the wings as hereinbefore described.
The ribs 21 and the interior wall of the base of the plug provide the necessary strength during instal-lation to prevent damage from occurring and the cone-1222~7 shaped configuration of the plugs, of course, facilitatesstacking thus providing compact storage.
Finally, the plurality of wings reinforced with the ribbing on the underside, provide the stability requi-red to secure the plug to the side wall of the test hole.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spi-rit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying s~ecification shall be interpreted as illustrative only and not in a limiting sense.
Figure 5 is a top plan view of Figure 3.
Figure 6 is a fragmentary isometric view of one end of the invention.
In the drawings like characters of reference indi-cate corresponding parts in the different figures.
DETAILED DESCRIPTION
Proceeding therefore to describe the invention in detail, reference should first be made to Figures 1 ~222~4~
and 2 which show prior art devices.
In Figure 1, a central base 10 is provided with a central aperture 11 and a plurality of wings 12 extend-ing radially from the perime-ter of the base with the dis-tal ends 13 being wider than the inner ends 14.
This not only weakens the wing attachment point, but also provides a planar base which is apertured and which not only permits the loading pole to be driven the-rethrough under certain circumstances, but also absorbs the ~ull force of the explosion from the bottom of the hole.
Figure 2 also includes a planar base 15 with a cone-shaped wall 16 extending upwardly therefrom and an outer flange 17 cut into segments by radial slits 18 form-ed therethrough. Once again, the planar base absorbs the force of the explosion and the relatively large aper-ture in the centre often results in the loading pole being forced therethrough.
The presen-t invention, which is illustrated in Figures 3 through 7, overcomes these disadvantages. It is preferably made from a plastics material such as Dupont (Sclair 2107) polyethylene although other plastics can be utilized.
It consists of a reinforced cone-shaped solid central base portion 19 formed with a relatively pointed lower end 20 and formed from the aforementioned plastic material or ~e equivalent and it will be noted that the thickness of this material increases as it approaches the pointed end 20 and that, furthermore, it is provided with a plurality of radially extending ribs 21 formed on the inner surface thereof as clearly shown in Figures 3 and 5.
Extending radially outwardly and upwardly from the upper edge 22 is a plurality of spaced apart fingers 23 which are formed integrally with the base and decrease in width from the point of connection 24 to the distal ends 25 which are curved.
It will also be noted that the thickness of these wings decreases from the base 24 to the ends 25 and that a reinforcing rib 26 is formed on the undersurface 27 and extends longitudinally from a point 23 on the outer surface of the conical base decreasing to 0 at the upper end 25 of each finger.
It will also be observed, from a perusal of Figure 3, that the angle of inclination of the wings along the longitudinal axis 29 thereof, is greater relative to the vertical axis 30 of the plug than the angle of inclination of the base portion 19 indicated by reference character 2~7 31 all of which reinforces the strength of the device and facilitates the efficient operation thereof while it is inserted.
When inserted by a conventional loading pole/
the edge-sharpened ends 25 engage the sides of the hole and cuts into the wall thus providing superior anchora~e and as upward pressure is applied due to the force of the explosion, these extremities bend or curve as the plug is moved initially upwardly slightly thus giving an S configuration, further deflection being resisted by the reinforcing ribs 26 on the underside of the wings.
The fact that the base of the device is solid without any central aperture, prevents earth fill from seeping through the plug and also eliminates any danger of the loading pole being forced downwardly through the base thus destroying the plug.
The pointed cone-shaped lower end 20 of the base disperses the energy caused by the explosion and any ener-gy that is applied to the underside of the plug causes the further engagement of the upper ends of the wings as hereinbefore described.
The ribs 21 and the interior wall of the base of the plug provide the necessary strength during instal-lation to prevent damage from occurring and the cone-1222~7 shaped configuration of the plugs, of course, facilitatesstacking thus providing compact storage.
Finally, the plurality of wings reinforced with the ribbing on the underside, provide the stability requi-red to secure the plug to the side wall of the test hole.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spi-rit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying s~ecification shall be interpreted as illustrative only and not in a limiting sense.
Claims
CLAIMS:
(1) A deviation hole plug comprising in combina-tion a reinforced cone-shaped, solid central base portion, a plurality of spaced apart wings extending radially up-wardly and outwardly from the upper edge of said central base portion and a longitudinally extending, centrally located reinforcing rib formed on the underside of each wing.
(2) The hole plug according to Claim 1 which includes a plurality of radially extending, reinforcing ribs formed on the inner surface of said central base por-tion.
(3) The hole plug according to Claim 1 in which the angle of inclination of the wings relative to the cen-tral longitudinal axis of said plug, is greater than the angle of inclination of the wall of said base portion rela-tive to the central longitudinal axis of said plug.
(4) The hole plug according to Claim 2 in which the angle of inclination of the wings relative to the cen-tral longitudinal axis of said plug, is greater than the angle of inclination of the wall of said base portion rela-tive to the central longitudinal axis of said plug.
(5) The hole plug according to Claim 1 in which the thickness of the wings tapers from the greatest thick-ness at the junction of said wings to said base portion, outwardly towards the least thickness at the distal ends thereof.
(6) The hole plug according to Claim 2 in which the thickness of the wings tapers from the greatest thick-ness at the junction of said wings to said base portion, outwardly towards the least thickness at the distal ends thereof.
(7) The hole plug according to Claim 3 in which the thickness of the wings tapers from the greatest thick-ness at the junction of said wings to said base portion, outwardly towards the least thickness at the distal ends thereof.
(8) The hole plug according to Claim 4 in which the thickness of the wings tapers from the greatest thick-ness at the junction of said wings to said base portion, outwardly towards the least thickness at the distal ends thereof.
(9) The hole plug according to Claim 1, 2 or 3 in which the apex of the base portion is thicker than the surrounding wall portion.
(10) The hole plug according to Claim 4, 5 or 6 in which the apex of the base portion is thicker than the surrounding wall portion.
(11) The hole plug according to Claim 1, 2 or 3 in which the distal ends of said wings are substantially edge sharpened.
(12) The hole plug according to Claim 4, 5 or 6 in which the distal ends of said wings are substantially edge sharpened.
(13) A deviation hole plug for plugging holes for seismic test purposes, said plug being formed from a plastics material and being circular in configuration when viewed in plan and cone-shaped in configuration when viewed in side elevation, the improvement comprising a solid central cone-shaped central base portion, a plurality of spaced apart wings extending radially upwardly and out-wardly from the upper edge of said central base portion and a longitudinally extending, centrally located reinfor-cing rib formed on the underside of each wing.
(14) The improvement according to Claim 13 which includes a plurality of radially extending, reinforcing ribs formed on the inner surface of said central base por-tion.
(15) The improvement according to Claim 13 in which the angle of inclination of the wings relative to the central longitudinal axis of said plug, is greater than the angle of inclination of the wall of said base portion relative to the central longitudinal axis of said plug.
(16) The improvement according to Claim 14 in which the angle of inclination of the wings relative to the central longitudinal axis of said plug, is greater than the angle of inclination of the wall of said base portion relative to the central longitudinal axis of said plug.
(17) The improvement according to Claim 13 in which the thickness of the wings tapers from the greatest thickness at the junction of said wings to said base pos-tion, outwardly towards the least thickness at the distal ends thereof.
(18) The improvement according to Claim 14 in which the thickness of the wings tapers from the greatest thickness at the junction of said wings to said base por-tion, outwardly towards the least thickness at the distal ends thereof.
(19) The improvement according to Claim 15 in which the thickness of the wings tapers from the greatest thickness at the junction of said wings to said base por-tion, outwardly towards the least thickness at the distal ends thereof.
(20) The improvement according to Claim 16 in which the thickness of the wings tapers from the greatest thickness at the junction of said wings to said base por-tion, outwardly towards the least thickness at the distal ends thereof.
(21) The improvement according to Claim 13, 14 or 15 in which the apex of the base portion is thicker than the surrounding wall portion.
(22) The improvement according to Claim 16, 17 or 18 in which the apex of the base portion is thicker than the surrounding wall portion.
(23) The improvement according to Claim 13, 14 or 15 in which the distal ends of said wings are sub-stantially edge sharpened.
(24) The improvement according to Claim 16, 17 or 18 in which the distal ends of said wings are sub-stantially edge sharped.
(1) A deviation hole plug comprising in combina-tion a reinforced cone-shaped, solid central base portion, a plurality of spaced apart wings extending radially up-wardly and outwardly from the upper edge of said central base portion and a longitudinally extending, centrally located reinforcing rib formed on the underside of each wing.
(2) The hole plug according to Claim 1 which includes a plurality of radially extending, reinforcing ribs formed on the inner surface of said central base por-tion.
(3) The hole plug according to Claim 1 in which the angle of inclination of the wings relative to the cen-tral longitudinal axis of said plug, is greater than the angle of inclination of the wall of said base portion rela-tive to the central longitudinal axis of said plug.
(4) The hole plug according to Claim 2 in which the angle of inclination of the wings relative to the cen-tral longitudinal axis of said plug, is greater than the angle of inclination of the wall of said base portion rela-tive to the central longitudinal axis of said plug.
(5) The hole plug according to Claim 1 in which the thickness of the wings tapers from the greatest thick-ness at the junction of said wings to said base portion, outwardly towards the least thickness at the distal ends thereof.
(6) The hole plug according to Claim 2 in which the thickness of the wings tapers from the greatest thick-ness at the junction of said wings to said base portion, outwardly towards the least thickness at the distal ends thereof.
(7) The hole plug according to Claim 3 in which the thickness of the wings tapers from the greatest thick-ness at the junction of said wings to said base portion, outwardly towards the least thickness at the distal ends thereof.
(8) The hole plug according to Claim 4 in which the thickness of the wings tapers from the greatest thick-ness at the junction of said wings to said base portion, outwardly towards the least thickness at the distal ends thereof.
(9) The hole plug according to Claim 1, 2 or 3 in which the apex of the base portion is thicker than the surrounding wall portion.
(10) The hole plug according to Claim 4, 5 or 6 in which the apex of the base portion is thicker than the surrounding wall portion.
(11) The hole plug according to Claim 1, 2 or 3 in which the distal ends of said wings are substantially edge sharpened.
(12) The hole plug according to Claim 4, 5 or 6 in which the distal ends of said wings are substantially edge sharpened.
(13) A deviation hole plug for plugging holes for seismic test purposes, said plug being formed from a plastics material and being circular in configuration when viewed in plan and cone-shaped in configuration when viewed in side elevation, the improvement comprising a solid central cone-shaped central base portion, a plurality of spaced apart wings extending radially upwardly and out-wardly from the upper edge of said central base portion and a longitudinally extending, centrally located reinfor-cing rib formed on the underside of each wing.
(14) The improvement according to Claim 13 which includes a plurality of radially extending, reinforcing ribs formed on the inner surface of said central base por-tion.
(15) The improvement according to Claim 13 in which the angle of inclination of the wings relative to the central longitudinal axis of said plug, is greater than the angle of inclination of the wall of said base portion relative to the central longitudinal axis of said plug.
(16) The improvement according to Claim 14 in which the angle of inclination of the wings relative to the central longitudinal axis of said plug, is greater than the angle of inclination of the wall of said base portion relative to the central longitudinal axis of said plug.
(17) The improvement according to Claim 13 in which the thickness of the wings tapers from the greatest thickness at the junction of said wings to said base pos-tion, outwardly towards the least thickness at the distal ends thereof.
(18) The improvement according to Claim 14 in which the thickness of the wings tapers from the greatest thickness at the junction of said wings to said base por-tion, outwardly towards the least thickness at the distal ends thereof.
(19) The improvement according to Claim 15 in which the thickness of the wings tapers from the greatest thickness at the junction of said wings to said base por-tion, outwardly towards the least thickness at the distal ends thereof.
(20) The improvement according to Claim 16 in which the thickness of the wings tapers from the greatest thickness at the junction of said wings to said base por-tion, outwardly towards the least thickness at the distal ends thereof.
(21) The improvement according to Claim 13, 14 or 15 in which the apex of the base portion is thicker than the surrounding wall portion.
(22) The improvement according to Claim 16, 17 or 18 in which the apex of the base portion is thicker than the surrounding wall portion.
(23) The improvement according to Claim 13, 14 or 15 in which the distal ends of said wings are sub-stantially edge sharpened.
(24) The improvement according to Claim 16, 17 or 18 in which the distal ends of said wings are sub-stantially edge sharped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000490640A CA1222447A (en) | 1985-09-13 | 1985-09-13 | Deviation hole plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000490640A CA1222447A (en) | 1985-09-13 | 1985-09-13 | Deviation hole plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1222447A true CA1222447A (en) | 1987-06-02 |
Family
ID=4131378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000490640A Expired CA1222447A (en) | 1985-09-13 | 1985-09-13 | Deviation hole plug |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1222447A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2510415A (en) * | 2013-02-04 | 2014-08-06 | Reeves Wireline Tech Ltd | A downhole seal with cup, skirt, and flexible limbs |
-
1985
- 1985-09-13 CA CA000490640A patent/CA1222447A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2510415A (en) * | 2013-02-04 | 2014-08-06 | Reeves Wireline Tech Ltd | A downhole seal with cup, skirt, and flexible limbs |
| US9840884B2 (en) | 2013-02-04 | 2017-12-12 | Reeves Wireline Technologies Limited | Downhole seal element and related apparatuses |
| GB2510415B (en) * | 2013-02-04 | 2019-11-13 | Reeves Wireline Tech Ltd | A downhole seal element and related apparatuses |
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