CA2287120A1 - A method of controlling a pipeline plow and a pipeline plow - Google Patents
A method of controlling a pipeline plow and a pipeline plow Download PDFInfo
- Publication number
- CA2287120A1 CA2287120A1 CA 2287120 CA2287120A CA2287120A1 CA 2287120 A1 CA2287120 A1 CA 2287120A1 CA 2287120 CA2287120 CA 2287120 CA 2287120 A CA2287120 A CA 2287120A CA 2287120 A1 CA2287120 A1 CA 2287120A1
- Authority
- CA
- Canada
- Prior art keywords
- pipeline
- plow
- leading edge
- attachment
- tow line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/10—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables
- E02F5/102—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables operatively associated with mole-ploughs, coulters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
- F16L1/032—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being continuous
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Soil Working Implements (AREA)
Abstract
A method of controlling a pipeline plow involves modifying the pipeline plow to provide for both a tow line attachment and a steering arm attachment. A vehicle equipped with a movable arm is positioned either behind or to one of side of the pipeline plow. The movable arm is secured to the steering arm attachment. A tow line is extended from the tow line attachment to a tow vehicle positioned a spaced distance from the pipeline plow. The pipeline plow is towed at the end of the tow line, while the path the pipeline plow follows is concurrently controlled with the movable arm.
Description
TITLE OF THE INVENTION:
A Method of Controlling A Pipeline Plow And A Pipeline Plow NAME ( S ) OF INVENTOR ( S ) Dean Richard McCrindle FIELD OF THE INVENTION
The present invention relates to a method of controlling a pipeline plow and a pipeline plow manufactured in accordance with the teachings of the method.
BACKGROUND OF THE INVENTION
Pipeline plows are used, as an alternative to trench excavations, to bury pipelines underground. A pipeline plow has a ground working blade with a leading edge and a trailing edge. A pipeline feed chute generally extends downwardly at an angle from the leading edge to the trailing edge. A
pipeline enters the pipeline feed chute above ground level from the leading edge and exits the pipeline feed chute underground from the trailing edge. Rollers are often positioned in the pipeline feed chute to reduce friction acting upon the pipeline as it slides along the pipeline feed chute.
In order to use a pipeline plow, the ground along a pipeline right of way is first loosened by a ground ripper attached to a crawler tractor. The pipeline plow is then secured in an off-set orientation behind the crawler tractor and the pipeline being fed over one of the tracks of the crawler tractor into the pipeline feed chute at the leading edge of the pipeline plow. This method of controlling the pipeline plow has an inherent problem. The off-set feed of the pipeline over the tracks of the crawler tractor into the pipeline plow causes a constant pull which tends to turn the crawler tractor and makes it difficult to control both the crawler tractor and the pipeline plow.
A Method of Controlling A Pipeline Plow And A Pipeline Plow NAME ( S ) OF INVENTOR ( S ) Dean Richard McCrindle FIELD OF THE INVENTION
The present invention relates to a method of controlling a pipeline plow and a pipeline plow manufactured in accordance with the teachings of the method.
BACKGROUND OF THE INVENTION
Pipeline plows are used, as an alternative to trench excavations, to bury pipelines underground. A pipeline plow has a ground working blade with a leading edge and a trailing edge. A pipeline feed chute generally extends downwardly at an angle from the leading edge to the trailing edge. A
pipeline enters the pipeline feed chute above ground level from the leading edge and exits the pipeline feed chute underground from the trailing edge. Rollers are often positioned in the pipeline feed chute to reduce friction acting upon the pipeline as it slides along the pipeline feed chute.
In order to use a pipeline plow, the ground along a pipeline right of way is first loosened by a ground ripper attached to a crawler tractor. The pipeline plow is then secured in an off-set orientation behind the crawler tractor and the pipeline being fed over one of the tracks of the crawler tractor into the pipeline feed chute at the leading edge of the pipeline plow. This method of controlling the pipeline plow has an inherent problem. The off-set feed of the pipeline over the tracks of the crawler tractor into the pipeline plow causes a constant pull which tends to turn the crawler tractor and makes it difficult to control both the crawler tractor and the pipeline plow.
SUMMARY OF THE INVENTION
What is required is an alternative method of controlling a pipeline plow.
According to one aspect of the present invention there is provided a pipeline plow that was developed in accordance with the teachings of the method. The pipeline plow includes a narrow elongate body having a leading edge, a trailing edge and opposed sides. A pipeline feed chute extends along the body between the leading edge and the trailing edge. A tow line attachment is positioned at the leading edge of body. A
steering arm attachment is secured to the body.
According to another aspect of the present invention there is provided a method of controlling a pipeline plow. A
modified form of pipeline plow is used, substantially as described above. A vehicle equipped with a movable arm is positioned either behind the trailing edge or to one of the opposed sides of the pipeline plow. The movable arm is secured to the steering arm attachment. A tow line is extended from the tow line attachment to one or two tow vehicles positioned a spaced distance from the pipeline plow. The pipeline plow is towed at the end of the tow line, while the path the pipeline plow follows is concurrently controlled with the movable arm.
With the method described in the prior art, the crawler tractor pulling the pipeline plow was never able to exert a full pulling force, as correction had to be continually made to control the alignment of the pipeline plow. In contrast, with the present method towing function and the steering function are separated. The tow vehicle performing the towing function is, therefore, able to exert a much greater pulling force without being constrained by steering problems. It is also possible to use two tow vehicles to double the available pulling force. With the method as described in the prior art, the crawler tractor pulling the pipeline plow drove ahead of the plow. In doing so, the crawler tractor inevitably compacted the loosened ground. In some types of terrain, such as muskeg, the pipeline plow could not be used, as the crawler tractor would sink into the ground. In contrast, with the present method one or, preferably, two tow vehicles can be used each laterally spaced from the area of loosened ground.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 labelled as PRIOR ART is a side elevation view of a crawler tractor pulling a pipeline plow.
FIGURE 2 labelled as PRIOR ART is a top plan view of the crawler tractor pulling a pipeline plow illustrated in FIGURE
1.
FIGURE 3 is a side elevation view of a crawler tractor pulling a pipeline plow in accordance with the teachings of the present invention.
FIGURE 4 is a top plan view of the crawler tractor pulling the pipeline plow illustrated in FIGURE 1.
FIGURE 5 is a perspective view of a pipeline plow constructed in accordance with the teachings of the present invention.
FIGURE 6 is a top plan view of the pipeline plow illustrated in FIGURE 5.
FIGURE 7 is a front elevation view of the pipeline plow illustrated in FIGURE 5.
FIGURE 8 is a side elevation view, partially in section, of the pipeline plow illustrated in FIGURE 5.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a pipeline plow generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 8.
What is required is an alternative method of controlling a pipeline plow.
According to one aspect of the present invention there is provided a pipeline plow that was developed in accordance with the teachings of the method. The pipeline plow includes a narrow elongate body having a leading edge, a trailing edge and opposed sides. A pipeline feed chute extends along the body between the leading edge and the trailing edge. A tow line attachment is positioned at the leading edge of body. A
steering arm attachment is secured to the body.
According to another aspect of the present invention there is provided a method of controlling a pipeline plow. A
modified form of pipeline plow is used, substantially as described above. A vehicle equipped with a movable arm is positioned either behind the trailing edge or to one of the opposed sides of the pipeline plow. The movable arm is secured to the steering arm attachment. A tow line is extended from the tow line attachment to one or two tow vehicles positioned a spaced distance from the pipeline plow. The pipeline plow is towed at the end of the tow line, while the path the pipeline plow follows is concurrently controlled with the movable arm.
With the method described in the prior art, the crawler tractor pulling the pipeline plow was never able to exert a full pulling force, as correction had to be continually made to control the alignment of the pipeline plow. In contrast, with the present method towing function and the steering function are separated. The tow vehicle performing the towing function is, therefore, able to exert a much greater pulling force without being constrained by steering problems. It is also possible to use two tow vehicles to double the available pulling force. With the method as described in the prior art, the crawler tractor pulling the pipeline plow drove ahead of the plow. In doing so, the crawler tractor inevitably compacted the loosened ground. In some types of terrain, such as muskeg, the pipeline plow could not be used, as the crawler tractor would sink into the ground. In contrast, with the present method one or, preferably, two tow vehicles can be used each laterally spaced from the area of loosened ground.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 labelled as PRIOR ART is a side elevation view of a crawler tractor pulling a pipeline plow.
FIGURE 2 labelled as PRIOR ART is a top plan view of the crawler tractor pulling a pipeline plow illustrated in FIGURE
1.
FIGURE 3 is a side elevation view of a crawler tractor pulling a pipeline plow in accordance with the teachings of the present invention.
FIGURE 4 is a top plan view of the crawler tractor pulling the pipeline plow illustrated in FIGURE 1.
FIGURE 5 is a perspective view of a pipeline plow constructed in accordance with the teachings of the present invention.
FIGURE 6 is a top plan view of the pipeline plow illustrated in FIGURE 5.
FIGURE 7 is a front elevation view of the pipeline plow illustrated in FIGURE 5.
FIGURE 8 is a side elevation view, partially in section, of the pipeline plow illustrated in FIGURE 5.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a pipeline plow generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 8.
Referring to FIGURES 1 and 2, labelled as PRIOR ART, the drawbacks of current methods of controlling pipeline plows is illustrated. A vehicle, illustrated in FIGURES 1 as a crawler tractor 12, is provided. Referring to FIGURE 1, crawler tractor 12 travels over the surface 14 of the ground 16 pulling a PRIOR ART pipeline plow 100 in a direction indicated by arrow 22. Referring to FIGURE 2, a portion 18 of ground 16 has been loosened in preparation for laying of a pipeline 20 beneath surface 14.
Referring to FIGURE l, PRIOR ART pipeline plow 100 has a ground working blade 101 . Ground working blade 101 has a f first end 102, a second end 104, a lower surface 106, an upper edge 108, a leading edge 109, and a trailing edge 110 extending downward from upper edge 108 to second end 104. A projecting plowshare 112 extends from leading edge 109 at first end 102 adjacent lower surface 106. Referring to FIGURE 2, leading edge 109 adjacent upper edge 108 is secured in an off-set position at a rear 24 of crawler tractor 12 to enable crawler tractor 12 to pull PRIOR ART pipeline plow 100. Referring to FIGURE l, ground working blade 101 has a pipeline feed chute 114 extending downward from an entrance 116 above ground level 14 at leading edge 109 to an exit 118 underground adjacent lower surface 106 at second end 104. Pipeline 20 is fed through entrance 116 into pipeline feed chute 114. As ground working blade 101 is pulled in direction 22, plowshare 112 displaces loosened soil 18 and ground working blade 101 moves through loosened soil 18 in direction 22, with lower surface 106 beneath and substantially parallel to surface 14 of ground 16. Pipeline 20 moves along pipeline feed chute 116 and is laid beneath surface 14, the loosened soil backfilling over the section of laid pipeline 26. Rollers (not shown) are positioned in pipeline feed chute 114 to reduce friction acting upon pipeline 20 as it slides along pipeline feed chute 114.
Referring to FIGURE 2, when PRIOR ART pipeline plow 100 is secured in an off-set orientation behind crawler tractor 12, pipeline 20 is fed over one of the tracks 30 of crawler tractor 12 into pipeline feed chute 114. This method of controlling pipeline plow 100 has an inherent problem. The off-set feed of pipeline 20 over one of tracks 30 of crawler tractor 12 into 5 pipeline plow 100 causes a constant pull which tends to turn crawler tractor 20 and makes it difficult to control both crawler tractor 20 and pipeline plow 100. As a consequence, crawler tractor 12 pulling pipeline plow 100 is never able to exert a full pulling force, as corrections have to be continually made to control the alignment of pipeline plow 100.
Further, one of tracks 30 of crawler tractor 12 unavoidably travels over loosened soil 18, thereby recompressing it.
Referring to FIGURES 5 through 8, pipeline plow 10 was developed for use in accordance with the preferred method, which will hereinafter be further described with reference to FIGURES 3 and 4. Referring to FIGURE 5, pipeline plow 10 includes a narrow elongate body 32 having a leading edge 34, a trailing edge 36, opposed sides 38, an upper edge 40 and a lower surface 42. A tow line attachment 46 is at leading edge 34 of body 32. A steering arm attachment 60 is secured at upper edge 40 toward leading edge 34 of body 32. A plowshare 62 is detachably secured at leading edge 34 adjacent lower surface 42 of body 32.
Referring to FIGURE 8, a pipeline feed chute 44 extends along body 32 between an entrance 48 at leading edge 34 at a position toward upper edge 40 and an exit 50 at trailing edge 36 adjacent lower surface 42. First guide rollers 52 are positioned as entrance 48 so as to guide pipeline 20 into pipeline feed chute 44, as shown in FIGURE 3, without contacting a peripheral edge 54 of entrance 48. A plurality of second guide rollers 56 is positioned within pipeline feed chute 44, so as to guide pipeline 20 through pipeline feed chute 44 without rubbing an inside surface 58 of pipeline feed chute 44.
Referring to FIGURE l, PRIOR ART pipeline plow 100 has a ground working blade 101 . Ground working blade 101 has a f first end 102, a second end 104, a lower surface 106, an upper edge 108, a leading edge 109, and a trailing edge 110 extending downward from upper edge 108 to second end 104. A projecting plowshare 112 extends from leading edge 109 at first end 102 adjacent lower surface 106. Referring to FIGURE 2, leading edge 109 adjacent upper edge 108 is secured in an off-set position at a rear 24 of crawler tractor 12 to enable crawler tractor 12 to pull PRIOR ART pipeline plow 100. Referring to FIGURE l, ground working blade 101 has a pipeline feed chute 114 extending downward from an entrance 116 above ground level 14 at leading edge 109 to an exit 118 underground adjacent lower surface 106 at second end 104. Pipeline 20 is fed through entrance 116 into pipeline feed chute 114. As ground working blade 101 is pulled in direction 22, plowshare 112 displaces loosened soil 18 and ground working blade 101 moves through loosened soil 18 in direction 22, with lower surface 106 beneath and substantially parallel to surface 14 of ground 16. Pipeline 20 moves along pipeline feed chute 116 and is laid beneath surface 14, the loosened soil backfilling over the section of laid pipeline 26. Rollers (not shown) are positioned in pipeline feed chute 114 to reduce friction acting upon pipeline 20 as it slides along pipeline feed chute 114.
Referring to FIGURE 2, when PRIOR ART pipeline plow 100 is secured in an off-set orientation behind crawler tractor 12, pipeline 20 is fed over one of the tracks 30 of crawler tractor 12 into pipeline feed chute 114. This method of controlling pipeline plow 100 has an inherent problem. The off-set feed of pipeline 20 over one of tracks 30 of crawler tractor 12 into 5 pipeline plow 100 causes a constant pull which tends to turn crawler tractor 20 and makes it difficult to control both crawler tractor 20 and pipeline plow 100. As a consequence, crawler tractor 12 pulling pipeline plow 100 is never able to exert a full pulling force, as corrections have to be continually made to control the alignment of pipeline plow 100.
Further, one of tracks 30 of crawler tractor 12 unavoidably travels over loosened soil 18, thereby recompressing it.
Referring to FIGURES 5 through 8, pipeline plow 10 was developed for use in accordance with the preferred method, which will hereinafter be further described with reference to FIGURES 3 and 4. Referring to FIGURE 5, pipeline plow 10 includes a narrow elongate body 32 having a leading edge 34, a trailing edge 36, opposed sides 38, an upper edge 40 and a lower surface 42. A tow line attachment 46 is at leading edge 34 of body 32. A steering arm attachment 60 is secured at upper edge 40 toward leading edge 34 of body 32. A plowshare 62 is detachably secured at leading edge 34 adjacent lower surface 42 of body 32.
Referring to FIGURE 8, a pipeline feed chute 44 extends along body 32 between an entrance 48 at leading edge 34 at a position toward upper edge 40 and an exit 50 at trailing edge 36 adjacent lower surface 42. First guide rollers 52 are positioned as entrance 48 so as to guide pipeline 20 into pipeline feed chute 44, as shown in FIGURE 3, without contacting a peripheral edge 54 of entrance 48. A plurality of second guide rollers 56 is positioned within pipeline feed chute 44, so as to guide pipeline 20 through pipeline feed chute 44 without rubbing an inside surface 58 of pipeline feed chute 44.
The preferred method of controlling pipeline plow 10 will now be described with reference to FIGURES 3 and 4. Referring to FIGURE 3, pipeline plow 10 is provided as described above.
A positioning vehicle 70 is equipped with a movable arm 72.
Positioning vehicle 70 is positioned at one of trailing edge 36 and opposed sides 38 of pipeline plow 10. For purposes of illustration only, positioning vehicle 70 is shown positioned at trailing edge 36 of pipeline plow 10 in FIGURES 3 and 4.
Referring to FIGURE 3, movable arm 72 is attached to steering arm attachment 60 of pipeline plow 10. A towline 66 is extended between rear 24 of tow vehicle, shown as crawler tractor 12, distanced from leading edge 34 and towline attachment 46 of body 32 of pipeline plow 10. It will be recognized that a plurality of towlines 66 may be extended from more than one crawler tractors 12 positioned a spaced distance from pipeline plow 10. Pipeline plow 10 is towed at an end 74 of tow line 66, while movable arm 72 is used to concurrently control the path of pipeline plow 10 through loosened soil 18.
Referring to FIGURE 4, when positioning vehicle 70 is positioned at trailing edge 36 of pipeline plow 10, movable arm, the position of which is shown by dotted lines in FIGURE
4, overlies body 32 of pipeline plow 10, enabling both a good view of the path of pipeline plow 10 and a high degree of control of the direction of movement of pipeline plow 10.
It will be apparent to one skilled in the art that advantages are provided by the above described method.
Referring to FIGURE 4, towing attachment 78 of crawler tractor 12 is shown in an offset position. There is no longer a need for towing attachment 78 on crawler tractor 12, to be in an offset position. Towing attachment 78 can be centrally positioned, so that crawler tractor 12 is not pulled to one side when a pulling force is exerted. Crawler tractor 12 can exert a full pulling force, without being constrained by the need to concurrently control the direction and orientation of pipeline plow 10. This separation of pulling and steering functions between crawler tractor 12 and positioning vehicle 70 allows separate and superior control of both the applied power and the direction of movement of pipeline plow. When there is a need for greater pulling power, more than one crawler tractor 12 can be used to pull pipeline plow 10.
Crawler tractor 12 does not need to travel over loosened soil, but can travel parallel to the path of loosened soil 18. As a consequence, crawler tractor 12 is able to apply a substantially full pulling force to move pipeline plow 10, and to do so without risk of recompressing loosened soil 18.
l0 It also will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
A positioning vehicle 70 is equipped with a movable arm 72.
Positioning vehicle 70 is positioned at one of trailing edge 36 and opposed sides 38 of pipeline plow 10. For purposes of illustration only, positioning vehicle 70 is shown positioned at trailing edge 36 of pipeline plow 10 in FIGURES 3 and 4.
Referring to FIGURE 3, movable arm 72 is attached to steering arm attachment 60 of pipeline plow 10. A towline 66 is extended between rear 24 of tow vehicle, shown as crawler tractor 12, distanced from leading edge 34 and towline attachment 46 of body 32 of pipeline plow 10. It will be recognized that a plurality of towlines 66 may be extended from more than one crawler tractors 12 positioned a spaced distance from pipeline plow 10. Pipeline plow 10 is towed at an end 74 of tow line 66, while movable arm 72 is used to concurrently control the path of pipeline plow 10 through loosened soil 18.
Referring to FIGURE 4, when positioning vehicle 70 is positioned at trailing edge 36 of pipeline plow 10, movable arm, the position of which is shown by dotted lines in FIGURE
4, overlies body 32 of pipeline plow 10, enabling both a good view of the path of pipeline plow 10 and a high degree of control of the direction of movement of pipeline plow 10.
It will be apparent to one skilled in the art that advantages are provided by the above described method.
Referring to FIGURE 4, towing attachment 78 of crawler tractor 12 is shown in an offset position. There is no longer a need for towing attachment 78 on crawler tractor 12, to be in an offset position. Towing attachment 78 can be centrally positioned, so that crawler tractor 12 is not pulled to one side when a pulling force is exerted. Crawler tractor 12 can exert a full pulling force, without being constrained by the need to concurrently control the direction and orientation of pipeline plow 10. This separation of pulling and steering functions between crawler tractor 12 and positioning vehicle 70 allows separate and superior control of both the applied power and the direction of movement of pipeline plow. When there is a need for greater pulling power, more than one crawler tractor 12 can be used to pull pipeline plow 10.
Crawler tractor 12 does not need to travel over loosened soil, but can travel parallel to the path of loosened soil 18. As a consequence, crawler tractor 12 is able to apply a substantially full pulling force to move pipeline plow 10, and to do so without risk of recompressing loosened soil 18.
l0 It also will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (3)
1. A method of controlling a pipeline plow, comprising the steps of:
providing a pipeline plow having:
a narrow elongate body with a leading edge, a trailing edge and opposed sides;
a pipeline feed chute extending along the body between the leading edge and the trailing edge;
a tow line attachment at the leading edge of body;
a steering arm attachment secured to the body;
positioning vehicle equipped with a movable arm at one of the trailing edge and opposed sides of the pipeline plow;
attaching the movable arm to the steering arm attachment;
extending a tow line from the tow line attachment to at least one tow vehicle positioned a spaced distance from the pipeline plow;
towing the pipeline plow at the end of the tow line, while concurrently controlling the path of the pipeline plow with the movable arm.
providing a pipeline plow having:
a narrow elongate body with a leading edge, a trailing edge and opposed sides;
a pipeline feed chute extending along the body between the leading edge and the trailing edge;
a tow line attachment at the leading edge of body;
a steering arm attachment secured to the body;
positioning vehicle equipped with a movable arm at one of the trailing edge and opposed sides of the pipeline plow;
attaching the movable arm to the steering arm attachment;
extending a tow line from the tow line attachment to at least one tow vehicle positioned a spaced distance from the pipeline plow;
towing the pipeline plow at the end of the tow line, while concurrently controlling the path of the pipeline plow with the movable arm.
2. A pipeline plow, comprising:
a narrow elongate body having a leading edge, a trailing edge and opposed sides;
a pipeline feed chute extending along the body between the leading edge and the trailing edge;
a tow line attachment at the leading edge of body;
a steering arm attachment secured to the body.
a narrow elongate body having a leading edge, a trailing edge and opposed sides;
a pipeline feed chute extending along the body between the leading edge and the trailing edge;
a tow line attachment at the leading edge of body;
a steering arm attachment secured to the body.
3. The pipeline plow as defined in Claim 2, wherein the pipeline feed chute is lined with guide rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2287120 CA2287120A1 (en) | 1999-10-19 | 1999-10-19 | A method of controlling a pipeline plow and a pipeline plow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2287120 CA2287120A1 (en) | 1999-10-19 | 1999-10-19 | A method of controlling a pipeline plow and a pipeline plow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2287120A1 true CA2287120A1 (en) | 2001-04-19 |
Family
ID=4164451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2287120 Abandoned CA2287120A1 (en) | 1999-10-19 | 1999-10-19 | A method of controlling a pipeline plow and a pipeline plow |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2287120A1 (en) |
-
1999
- 1999-10-19 CA CA 2287120 patent/CA2287120A1/en not_active Abandoned
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|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |