CA1220134A - Topping and tamping plug - Google Patents
Topping and tamping plugInfo
- Publication number
- CA1220134A CA1220134A CA000472860A CA472860A CA1220134A CA 1220134 A CA1220134 A CA 1220134A CA 000472860 A CA000472860 A CA 000472860A CA 472860 A CA472860 A CA 472860A CA 1220134 A CA1220134 A CA 1220134A
- Authority
- CA
- Canada
- Prior art keywords
- plug
- body member
- elongated members
- end part
- bore hole
- 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
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
Abstract
THE ABSTRACT OF THE DISCLOSURE
There is provided a new and useful tamping and topping plug for use in a seismic bore hole. and comprising a body member having a forward and a rearward end and terminating at its forward end with a closed end part, a plurality of elongated members extending outwardly and rearwardly from the body member, the members so arranged as to give the plug axial stability when inserted into a bore hole. There is also provided a process utilizing the plug for enhancing information available from seismic blasting.
There is provided a new and useful tamping and topping plug for use in a seismic bore hole. and comprising a body member having a forward and a rearward end and terminating at its forward end with a closed end part, a plurality of elongated members extending outwardly and rearwardly from the body member, the members so arranged as to give the plug axial stability when inserted into a bore hole. There is also provided a process utilizing the plug for enhancing information available from seismic blasting.
Description
~2ZCl~l3~
This application relates to tamping and topping plugs for bore holes.
BACK~ROUND OF THE INVæNTION
In carrying out a seismic exploration, a standard procedure is to drill hsles into the geologic formations of interest and to plant explosive charges in the bore holes. The charges are then detonated and appropriate measurements recorded to enable evaluation of the formation.
There are a number of problems associated with this seismic drilling. One of these occurs during the actual blast. Unless the hole is properly plugged prior to detonation, a large proportion of the energy of the blast escapes upwardly through the hole and is thus not properly directed through the formation of interest.
There is therefore a continuing need for a bore hole plug which i8 simple and inexpensive in construction yet sufficiently durable to remain in place for extended periods and to withstand the force of the blast. To date, a variety of plugs have been proposed and used, but these do not satis~ac~orily meet all of the criteria set out above.
In addition, plugs are required to be inserted into bore holes to support concrete, earth or other topping materials u~ed to close the hole. ~ccordingly, a simple plug which could withstand the force of the blast and remain in the 3~
hole as a topeing plug would be highly desirable. Such a plug could be used as a topping plug only i~ required.
The bore hole plug of the present inverltion is intended to alleviate the problems discussed.
PRIOR ART
~ arious types of tamping and topping plugs are known in the art, but none of these offer the advantages of the present invention.
Canadian Patent ~27,~27, issued November 18, 1969, to ~ce Explosives Ltd. provides a drive point for explosive charges having some similarity in structure but used for a completely unrelated purpose.
Canadian Pa~ent 920,50~, issued February 6, 1973, to Ovelson, illustrates one form of topping plug for use subsequent to drilling and shooting of a seismic tet hole.
The device utilizes a flanged annular ri~ at right angles to a body section which rim has the facility of limited diametrical size adjustment.
Canadian Patent 1,010,7~0, issued May 24, 1977, to ~arkicevic, provides another form of plug device for marking and ~lugging bore holes at the surface. The device is not intended to confine the blast to the hole.
Canadian Patent 1,048,405~ issued Feburary 13, 1979, to Bassani, provides a further form of hole plugging device for ~.Z2~3~
use in plugging holes following blasting.
United States Patent 2,8~2,876, issued February ll, 1958, to Murrow, et al., illustrates a form of bridging plug for use in plugging a bore hole or isolating a lower section of a well.
United States Patent 3,264,992, issued ~ugust 9, 1966, to Beck, illus~rates a tamping plug comprising ~wo parts which work together to plug a bore hole during blast in the hole.
Finally, Canadian Applica~ion Serial No. 462,827 filed September lO, 1984, by Jim Jackson, one of the inventors in the present case, illustrates a different form of tamping and topping plug for use in bore holes.
SUMM~RY OF THE INVENTION
A simple molded plastic device has now been developed which is light, economical, of once piece construction: and which is very effective in tamping and plugging bore holes to confine the force of the blast to the hole.
The invention thus provides a tamping and topping plug for use in a seismic bore hole, comprising a body member having a forward and a rearward end, terminating at its forward end with a closed end part, a plurality of elongated members extending outwardly and rearwardly from at least one end of the body member, the members so arranged as to give the plug axial stability when inserted into a bore hole.
~L~2~
In a preferred embodiment the body member is cylindrical and the elongated members extend from the front and rear ends of the body member.
There is further provided a process for enhancing the information obtainable from seismic blasting comprising inserting into a seismic borehole in which an explosive charge has been placed, and above the said charge, a tamping plug comprising a body member having a forward and a rearward end and terminating at its forward end with a closed end part, a plurality of elongated members extending outwardly and rearwardly from at least one end of the said body member, said members so arranged as to give said plug axial stability when inserted into a bore hole: then exploding the charge and taking seismic readings.
BRIEF DESCRIPTION OF THE DRAWINGS
In drawings which illustrate embodiments of the invention, FIGURE l is a perspective view of a plug according to the invention:
FIGURE 2 is a front plan view of a plug according to the invention:
FIGURE 3 is a side elevation of a plug according to the invention:
FIGU~E 4 is a rear plan view of a plug according to the inven~ion:
~ 4 --.'; ,.,~
~;~2~3~L
FIGURE 5 illustrates a plug according to ~he invention located in a bore hole prior to a blast:
FIGURE 6 is a side elevation of a further embodiment of the invention:
F'IG~RE 7 is a rear plan view oE the embodimen~ of FIGURE 6:
FIGURE 8 illustrates the embodiment of FIGUKES 6 and 7 in use in a bore hole prior to a blast; and FtGURE 9 illustrates the embodiment of FIGURE 5 after the blast.
While the invention will be described in conjunction with illustrated embodiments, it will be understood that it is not intended to limit the invention ~o such embodiments. On the contrary, it is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
DETAILED DESCRIPTION OF THE PREFERRED E~BODI~ENTS
In the following description, similar features in the drawings have been given similar reference numerals.
The plug lO includes a body sec~ion 12 of cylindrical configuration. The plug is preferably formed of a resilient material such as elastomer or a plastic. The forward end l~ of the body section 12 terminates in the illustrated embodiment in ~Z~L3~L
a truncated conical end section 16.
The end section 16 may be profiled in a number oE
different configurations other than conical. For example, hemispherical, eyramidal or flat end sections 16 would also se~ve. It is ba6ically only required ~hat the end 14 be substantially closed.
The most preferred embodiment of end section 16, however, is the illustrated truncated cone.
~ series of elongated members or claws 18 and 20 protrude outwardly and rearwardly from the front 14 and rear 22 of the body section 12. These members are intagral with the body section 12.
While various configurations of the individual members 18 and ~0 would be acceptable, it is preferred ~hat the width and thickness both decrease from the ba6e 24 to the outer extremity 26 of the said members. ~s illustrated, the forward members 18 are molded to smoothly taper to an edge 28; while the rearward members Z0 are somewhat thicker and are bevelled at 30 toward the ends 32.
The front and rear claws 18 and 20 are as a group preferably arranged in a symmetrical fashion about the plug body 12. The plug lO thereby has good directional stability in the bore hole and i8 prevented from becoming misaligned on insertion oc with the force of the b].a~t. In the preferred configura~ion the plug includes two forward claws 18 and four rear claw6 20.
~20~3~
~ pair of flange sec~ions 34 and 36 extend around a major part of ~he rear end 38 of the body section 12. These flange sections leave spaces ~0 and ~2 behind the forward claws 18. The flange sections 34 and 36, when the plug is in use, fit closely to the sides of the bore hole to reduce blast leakage around the sides of the plug. In the prefecred embodimen~ the flange sections are in part integral with ~he rear claws 20. In this situation the flange sections play an important reinforcing role in aiding the members 20 to withstand the force of the blast.
The manner of use of the plug is as follows. After a hole 43 has been drilled and the explosive charge planted in the hole, the plug of the present invention is inserted into the hole. The charge is then exploded. The Eorce of the explosion causes a flexing of the plug and causes the plug to move up the hole slightly. This serves to set the claws 18 and 20 into the sides of the hole to confine the blast. A
comparison of FIGURES 5 and 9 illustrates clearly the position before and after the blas~.
The set~ing of the claws in this manner is aided by the extra force which is brought to bear on the plug by reason of the flat portion 44 of the truncated conical end 16. Thus a fairly flat such end portion is highly preferred.
In this way the force of the blast is substantially confined to the hole and so to the sucrounding formations.
The plug 10 is then normally left in the hole as a 3qL
topping plug and the filling material, such as concrete, then poured in on top. In use the upward Eorce exerted by the plug during the blast looses a substantial amount of material from the walls 52 (FIGURE 9) of ~he hole which material then becomes toeping fill.
A further embodiment of the invention is illustrated in FIGURES 6 to 8. In some situations of intermediate diameter bore holes that embodiment may be found to be preferable.
With reference to FIGURES 6 to 8, the body member 12 has a flattened conical end part 16 from which a series of integral elongated members 18 emanate. The members 18 are integral with each other in the area near the end section 16 to focm a screen section 46.
In use the diameter of the extremity 48 of the screen section 46 is chosen to approximate the diameteL of the bore hole in which the plug is to be used. The screen sec~ion ~6 thereby ensures that the blast is confined.
The plug of this embodiment preferably includes a series of support and stiffening webs 50 extending between body 20 member 12 and screen section 46. The webs 50 ereferably extend to near the outer extremity of screen section 46 and so preferably approximate the diameter of the hole in ~which the plug is to be used. The webs 50 also aid in maintaining the directional stability of the plug, This embodiment operates in the same manner as that described earlier. The explosive charge is placed in the bore ~ ;2 20~3~L
hole and the plug oE the invention inserted thereafter. The charge is then exploded causing the plug to flex and move slightly up the hole, thus setting the claws 18 in the walls of the hole in the manner illustrated for the first plug type illustrated in FIGURE 9.
~ further embodiment similar to that of FIGURES 6 to 8 may be utilized in which the members 18 extend from the rear end of the body melnber 12. That embodiment is less preferred because it is less di~ectionally stable in the face of a blast.
Thus it is apparen~ that there has been provided in accordance with the invention tamping and topping plug for bore holes that fully satisfies the objects, aims and advantages set focth above. While the invention has been desc~ibed in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. ~cco~dingly, it is intended to embrace all such alte~natives, modifications and variations as fall within the spirit and broad scope of the invention.
12~ 3~
SUPPLEM~NTARY DISCLOSURE
FIGURE 10 is a side eJ.eva~ion of a further embodiment according to the invention.
FIGURE 11 is an end eleva~ion of the plug according to FIGURE 10.
It has now been discovered that a practical topping and tamping plug can be constructed as illustrated in FIGURE
10. In that embodiment the elongated members or claws 60 are placed intermediate the ends 62 and 6~ of the cylindrical body section 12 of the plug 10. As with the earlier embodiments, the force of the bla~t will cause a flexing and a short upward movement of the plug which serves to set the claws 60 into the walls of the borehole.
This application relates to tamping and topping plugs for bore holes.
BACK~ROUND OF THE INVæNTION
In carrying out a seismic exploration, a standard procedure is to drill hsles into the geologic formations of interest and to plant explosive charges in the bore holes. The charges are then detonated and appropriate measurements recorded to enable evaluation of the formation.
There are a number of problems associated with this seismic drilling. One of these occurs during the actual blast. Unless the hole is properly plugged prior to detonation, a large proportion of the energy of the blast escapes upwardly through the hole and is thus not properly directed through the formation of interest.
There is therefore a continuing need for a bore hole plug which i8 simple and inexpensive in construction yet sufficiently durable to remain in place for extended periods and to withstand the force of the blast. To date, a variety of plugs have been proposed and used, but these do not satis~ac~orily meet all of the criteria set out above.
In addition, plugs are required to be inserted into bore holes to support concrete, earth or other topping materials u~ed to close the hole. ~ccordingly, a simple plug which could withstand the force of the blast and remain in the 3~
hole as a topeing plug would be highly desirable. Such a plug could be used as a topping plug only i~ required.
The bore hole plug of the present inverltion is intended to alleviate the problems discussed.
PRIOR ART
~ arious types of tamping and topping plugs are known in the art, but none of these offer the advantages of the present invention.
Canadian Patent ~27,~27, issued November 18, 1969, to ~ce Explosives Ltd. provides a drive point for explosive charges having some similarity in structure but used for a completely unrelated purpose.
Canadian Pa~ent 920,50~, issued February 6, 1973, to Ovelson, illustrates one form of topping plug for use subsequent to drilling and shooting of a seismic tet hole.
The device utilizes a flanged annular ri~ at right angles to a body section which rim has the facility of limited diametrical size adjustment.
Canadian Patent 1,010,7~0, issued May 24, 1977, to ~arkicevic, provides another form of plug device for marking and ~lugging bore holes at the surface. The device is not intended to confine the blast to the hole.
Canadian Patent 1,048,405~ issued Feburary 13, 1979, to Bassani, provides a further form of hole plugging device for ~.Z2~3~
use in plugging holes following blasting.
United States Patent 2,8~2,876, issued February ll, 1958, to Murrow, et al., illustrates a form of bridging plug for use in plugging a bore hole or isolating a lower section of a well.
United States Patent 3,264,992, issued ~ugust 9, 1966, to Beck, illus~rates a tamping plug comprising ~wo parts which work together to plug a bore hole during blast in the hole.
Finally, Canadian Applica~ion Serial No. 462,827 filed September lO, 1984, by Jim Jackson, one of the inventors in the present case, illustrates a different form of tamping and topping plug for use in bore holes.
SUMM~RY OF THE INVENTION
A simple molded plastic device has now been developed which is light, economical, of once piece construction: and which is very effective in tamping and plugging bore holes to confine the force of the blast to the hole.
The invention thus provides a tamping and topping plug for use in a seismic bore hole, comprising a body member having a forward and a rearward end, terminating at its forward end with a closed end part, a plurality of elongated members extending outwardly and rearwardly from at least one end of the body member, the members so arranged as to give the plug axial stability when inserted into a bore hole.
~L~2~
In a preferred embodiment the body member is cylindrical and the elongated members extend from the front and rear ends of the body member.
There is further provided a process for enhancing the information obtainable from seismic blasting comprising inserting into a seismic borehole in which an explosive charge has been placed, and above the said charge, a tamping plug comprising a body member having a forward and a rearward end and terminating at its forward end with a closed end part, a plurality of elongated members extending outwardly and rearwardly from at least one end of the said body member, said members so arranged as to give said plug axial stability when inserted into a bore hole: then exploding the charge and taking seismic readings.
BRIEF DESCRIPTION OF THE DRAWINGS
In drawings which illustrate embodiments of the invention, FIGURE l is a perspective view of a plug according to the invention:
FIGURE 2 is a front plan view of a plug according to the invention:
FIGURE 3 is a side elevation of a plug according to the invention:
FIGU~E 4 is a rear plan view of a plug according to the inven~ion:
~ 4 --.'; ,.,~
~;~2~3~L
FIGURE 5 illustrates a plug according to ~he invention located in a bore hole prior to a blast:
FIGURE 6 is a side elevation of a further embodiment of the invention:
F'IG~RE 7 is a rear plan view oE the embodimen~ of FIGURE 6:
FIGURE 8 illustrates the embodiment of FIGUKES 6 and 7 in use in a bore hole prior to a blast; and FtGURE 9 illustrates the embodiment of FIGURE 5 after the blast.
While the invention will be described in conjunction with illustrated embodiments, it will be understood that it is not intended to limit the invention ~o such embodiments. On the contrary, it is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
DETAILED DESCRIPTION OF THE PREFERRED E~BODI~ENTS
In the following description, similar features in the drawings have been given similar reference numerals.
The plug lO includes a body sec~ion 12 of cylindrical configuration. The plug is preferably formed of a resilient material such as elastomer or a plastic. The forward end l~ of the body section 12 terminates in the illustrated embodiment in ~Z~L3~L
a truncated conical end section 16.
The end section 16 may be profiled in a number oE
different configurations other than conical. For example, hemispherical, eyramidal or flat end sections 16 would also se~ve. It is ba6ically only required ~hat the end 14 be substantially closed.
The most preferred embodiment of end section 16, however, is the illustrated truncated cone.
~ series of elongated members or claws 18 and 20 protrude outwardly and rearwardly from the front 14 and rear 22 of the body section 12. These members are intagral with the body section 12.
While various configurations of the individual members 18 and ~0 would be acceptable, it is preferred ~hat the width and thickness both decrease from the ba6e 24 to the outer extremity 26 of the said members. ~s illustrated, the forward members 18 are molded to smoothly taper to an edge 28; while the rearward members Z0 are somewhat thicker and are bevelled at 30 toward the ends 32.
The front and rear claws 18 and 20 are as a group preferably arranged in a symmetrical fashion about the plug body 12. The plug lO thereby has good directional stability in the bore hole and i8 prevented from becoming misaligned on insertion oc with the force of the b].a~t. In the preferred configura~ion the plug includes two forward claws 18 and four rear claw6 20.
~20~3~
~ pair of flange sec~ions 34 and 36 extend around a major part of ~he rear end 38 of the body section 12. These flange sections leave spaces ~0 and ~2 behind the forward claws 18. The flange sections 34 and 36, when the plug is in use, fit closely to the sides of the bore hole to reduce blast leakage around the sides of the plug. In the prefecred embodimen~ the flange sections are in part integral with ~he rear claws 20. In this situation the flange sections play an important reinforcing role in aiding the members 20 to withstand the force of the blast.
The manner of use of the plug is as follows. After a hole 43 has been drilled and the explosive charge planted in the hole, the plug of the present invention is inserted into the hole. The charge is then exploded. The Eorce of the explosion causes a flexing of the plug and causes the plug to move up the hole slightly. This serves to set the claws 18 and 20 into the sides of the hole to confine the blast. A
comparison of FIGURES 5 and 9 illustrates clearly the position before and after the blas~.
The set~ing of the claws in this manner is aided by the extra force which is brought to bear on the plug by reason of the flat portion 44 of the truncated conical end 16. Thus a fairly flat such end portion is highly preferred.
In this way the force of the blast is substantially confined to the hole and so to the sucrounding formations.
The plug 10 is then normally left in the hole as a 3qL
topping plug and the filling material, such as concrete, then poured in on top. In use the upward Eorce exerted by the plug during the blast looses a substantial amount of material from the walls 52 (FIGURE 9) of ~he hole which material then becomes toeping fill.
A further embodiment of the invention is illustrated in FIGURES 6 to 8. In some situations of intermediate diameter bore holes that embodiment may be found to be preferable.
With reference to FIGURES 6 to 8, the body member 12 has a flattened conical end part 16 from which a series of integral elongated members 18 emanate. The members 18 are integral with each other in the area near the end section 16 to focm a screen section 46.
In use the diameter of the extremity 48 of the screen section 46 is chosen to approximate the diameteL of the bore hole in which the plug is to be used. The screen sec~ion ~6 thereby ensures that the blast is confined.
The plug of this embodiment preferably includes a series of support and stiffening webs 50 extending between body 20 member 12 and screen section 46. The webs 50 ereferably extend to near the outer extremity of screen section 46 and so preferably approximate the diameter of the hole in ~which the plug is to be used. The webs 50 also aid in maintaining the directional stability of the plug, This embodiment operates in the same manner as that described earlier. The explosive charge is placed in the bore ~ ;2 20~3~L
hole and the plug oE the invention inserted thereafter. The charge is then exploded causing the plug to flex and move slightly up the hole, thus setting the claws 18 in the walls of the hole in the manner illustrated for the first plug type illustrated in FIGURE 9.
~ further embodiment similar to that of FIGURES 6 to 8 may be utilized in which the members 18 extend from the rear end of the body melnber 12. That embodiment is less preferred because it is less di~ectionally stable in the face of a blast.
Thus it is apparen~ that there has been provided in accordance with the invention tamping and topping plug for bore holes that fully satisfies the objects, aims and advantages set focth above. While the invention has been desc~ibed in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. ~cco~dingly, it is intended to embrace all such alte~natives, modifications and variations as fall within the spirit and broad scope of the invention.
12~ 3~
SUPPLEM~NTARY DISCLOSURE
FIGURE 10 is a side eJ.eva~ion of a further embodiment according to the invention.
FIGURE 11 is an end eleva~ion of the plug according to FIGURE 10.
It has now been discovered that a practical topping and tamping plug can be constructed as illustrated in FIGURE
10. In that embodiment the elongated members or claws 60 are placed intermediate the ends 62 and 6~ of the cylindrical body section 12 of the plug 10. As with the earlier embodiments, the force of the bla~t will cause a flexing and a short upward movement of the plug which serves to set the claws 60 into the walls of the borehole.
Claims (24)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A tamping and topping plug for use in a seismic bore hole, and comprising:
a body member having a forward and a rearward end and terminating at its forward end with a somewhat flattened end part:
a plurality of elongated members extending outwardly and rearwardly from at least one end of the said body member, said members so arranged as to give said plug axial stability when inserted into a bore hole.
a body member having a forward and a rearward end and terminating at its forward end with a somewhat flattened end part:
a plurality of elongated members extending outwardly and rearwardly from at least one end of the said body member, said members so arranged as to give said plug axial stability when inserted into a bore hole.
2. The plug of claim 1 in which the said elongated members extend from at least the forward end of the said body member.
3. The plug of claim 1 in which the said elongated members extend from at least the rearward end of the said body member.
4. The plug of claim 1 in which the configuration of the said end part is chosen from the group consisting of a hemisphere, a truncated pyramid, a truncated cone and a flat surface.
5. The plug of claim 1 in which the configuration of the said end part is a truncated cone.
6. The plug of claim 1 including at least two said elongated members at each of the said forward and rearward ends of the said body member.
7. The plug of claim 6 in which the said end part is a cone.
8. The plug of claim 7 in which the said cone is truncated.
9. The plug of claim 6, 7 or 8 in which the plug is resilient and is formed of an elastomeric or plastic material.
10. The plug of claim 8 in which the said device is formed of a resilient elastomer or plastic and in which said elongated members are relatively wider circumferentially of said body member and relatively thinner radially of said body member.
11. The plug of claim 10 in which at least two of the said elongated members are located at each of the forward and rearward ends of the said body member and wherein the said members are located symmetrically about the circumference of said body member.
12. The plug of claim 10 in which four said elongated members are located symmetrically about a diameter at the rearward end, and two said elongated members are located symmetrically about a diameter at the forward end, of said body member, and the six said elongated members are substantially equispaced about the circumference of the said body member.
13. The plug of claim 1 in which the plug material is resilient, in which the said end part is curved convexly or is conical in configuration, and in which a plurality of said elongated members extend integrally from said front part, said elongated members being integral with each other near the said body member to form a screen section extending outwardly and backwardly from the forward edge of said body member.
14. The plug of claim 13 in which the diameter of the extremity of said screen section is approximately equal to the diameter of the bore hole in which the plug is to be used.
15. The plug of claim 14 including a series of reinforcing webs between said body member and said screen section.
16. The plug of claim 1 in which said body member is cylindrical.
17. A process for enhancing the information obtainable from seismic blasting comprising: inserting into a seismic borehole in which an explosive charge has been placed, and above the said charge, a tamping plug comprising a body member having a forward and a rearward end and terminating at its forward end with a conical end part, a plurality of elongated members extending outwardly and rearwardly from at least the forward end of the said body member, said members so arranged as to give said plug axial stability when inserted into the said bore hole.
18. The process of claim 17 in which said conical end part is truncated.
19. The process of claim 17 including the step of thereafter exploding the said charge.
CLAIMS SUPPORTED BY SUPPLEMENTARY DISCLOSURE
CLAIMS SUPPORTED BY SUPPLEMENTARY DISCLOSURE
20. A tamping and topping plug for use in a seismic bore hole, and comprising:
a body member having a forward and a rearward end and terminating at its forward end with a somewhat flattened end part and;
a plurality of elongated members extending outwardly and rearwardly from locations on at least one circumferential line around said body member.
a body member having a forward and a rearward end and terminating at its forward end with a somewhat flattened end part and;
a plurality of elongated members extending outwardly and rearwardly from locations on at least one circumferential line around said body member.
21. The plug of claim 20 wherein said at least one circumferential line is intermediate the ends of said body member.
22. The plug of claim 21 in which the said elongated members are located at positions on a single circumferential line around said member and intermediate the ends thereof.
23. The plug of claim 22 in which the said end part is in the shape of a forwardly extending truncated cone.
24. The plug of claim 23 in which the said device is formed of a resilient elastomer or plastic and in which said elongated members are relatively wider circumferentially and narrower radially of said body member.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000472860A CA1220134A (en) | 1985-01-25 | 1985-01-25 | Topping and tamping plug |
| US06/712,101 US4669540A (en) | 1985-01-25 | 1985-03-14 | Topping and tamping plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000472860A CA1220134A (en) | 1985-01-25 | 1985-01-25 | Topping and tamping plug |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000507545A Division CA1223810A (en) | 1986-04-24 | 1986-04-24 | Topping and tamping plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1220134A true CA1220134A (en) | 1987-04-07 |
Family
ID=4129678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000472860A Expired CA1220134A (en) | 1985-01-25 | 1985-01-25 | Topping and tamping plug |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4669540A (en) |
| CA (1) | CA1220134A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151080A (en) * | 2022-02-10 | 2022-03-08 | 山东省煤田地质局第五勘探队 | Underground mineral mining device and mineral analysis method |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3713577C2 (en) * | 1986-12-03 | 1995-06-01 | Universale Bau Gmbh | Groundwater exploration process in the manufacture of a well |
| US4787315A (en) * | 1987-08-31 | 1988-11-29 | Kenny John J | Apparatus for severing tubular members |
| US5247886A (en) * | 1992-10-14 | 1993-09-28 | The Curators Of The University Of Missouri | Blast plug and stemming construction for blast holes |
| US5253586A (en) * | 1992-10-15 | 1993-10-19 | The Curators Of The University Of Missouri | Method of stemming a blast hole |
| US5467824A (en) * | 1994-12-09 | 1995-11-21 | Senior Engineering Company | Apparatus for and a method of severing multiple casing strings using explosives |
| US5709265A (en) * | 1995-12-11 | 1998-01-20 | Weatherford/Lamb, Inc. | Wellbore window formation |
| US5636692A (en) * | 1995-12-11 | 1997-06-10 | Weatherford Enterra U.S., Inc. | Casing window formation |
| US5791417A (en) * | 1995-09-22 | 1998-08-11 | Weatherford/Lamb, Inc. | Tubular window formation |
| GB2341404A (en) * | 1998-09-12 | 2000-03-15 | Weatherford Lamb | Plug and plug set for use in a wellbore |
| US6712153B2 (en) * | 2001-06-27 | 2004-03-30 | Weatherford/Lamb, Inc. | Resin impregnated continuous fiber plug with non-metallic element system |
| US7036602B2 (en) | 2003-07-14 | 2006-05-02 | Weatherford/Lamb, Inc. | Retrievable bridge plug |
| CA2544494C (en) * | 2003-11-07 | 2010-07-13 | Sean Peter Buxton | Plug member |
| US8136449B2 (en) | 2010-05-17 | 2012-03-20 | Escamilla Peter S | Explosive powder plug and method of using the same |
| DE102010050494B4 (en) * | 2010-07-08 | 2013-08-01 | Wulf Splittstoeßer | Closure for a borehole |
| US9016320B1 (en) | 2011-06-30 | 2015-04-28 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Intelligent flow control valve |
| EP3140607B1 (en) * | 2014-06-26 | 2018-10-17 | Penhine Proprietary Limited | A support device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA827427A (en) * | 1969-11-18 | T. Graham Stanley | Drive point for explosive charge | |
| CA793772A (en) * | 1968-09-03 | L. Silver Julius | Method of xerographically photosensitizing planographic printing plates | |
| CH25121A (en) * | 1901-12-10 | 1903-03-31 | Staub Schaerer C | Lapel hat for barrel taps |
| US2450366A (en) * | 1944-11-24 | 1948-09-28 | Jerry D Williams | Apparatus and method for seismographic exploration shooting |
| NL74872C (en) * | 1948-10-28 | |||
| US2710065A (en) * | 1951-08-31 | 1955-06-07 | Jr Andrew C Hamilton | Well bridging device |
| US2822876A (en) * | 1955-10-26 | 1958-02-11 | M & M Mfg Company Inc | Deep well bridge |
| US3039534A (en) * | 1959-03-16 | 1962-06-19 | Marvin C Koop | Bridge for plugging holes |
| US3264992A (en) * | 1964-03-09 | 1966-08-09 | Marlin E Beck | Tamping plug |
| CA920508A (en) * | 1971-01-18 | 1973-02-06 | V. Ovelson Kenneth | Test hole plug |
| CA1010780A (en) * | 1975-03-20 | 1977-05-24 | Andrew Markicevic | Blasting plug |
| CA1048405A (en) * | 1976-12-23 | 1979-02-13 | Peppino Bassani | Seismic drill hole surface plug |
-
1985
- 1985-01-25 CA CA000472860A patent/CA1220134A/en not_active Expired
- 1985-03-14 US US06/712,101 patent/US4669540A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151080A (en) * | 2022-02-10 | 2022-03-08 | 山东省煤田地质局第五勘探队 | Underground mineral mining device and mineral analysis method |
| CN114151080B (en) * | 2022-02-10 | 2022-04-15 | 山东省煤田地质局第五勘探队 | Underground mineral mining device and mineral analysis method |
Also Published As
| Publication number | Publication date |
|---|---|
| US4669540A (en) | 1987-06-02 |
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