GB2134567A - Trenching plough - Google Patents
Trenching plough Download PDFInfo
- Publication number
- GB2134567A GB2134567A GB08402585A GB8402585A GB2134567A GB 2134567 A GB2134567 A GB 2134567A GB 08402585 A GB08402585 A GB 08402585A GB 8402585 A GB8402585 A GB 8402585A GB 2134567 A GB2134567 A GB 2134567A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubes
- trench
- shield
- trenching
- pipeline
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
- H02G1/10—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle in or under water
-
- 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
- E02F5/104—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 for burying conduits or cables in trenches under water
-
- 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
- E02F5/104—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 for burying conduits or cables in trenches under water
- E02F5/106—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 for burying conduits or cables in trenches under water using ploughs, coulters, rippers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
A trenching plough for cutting a trench for a pipeline or cable in the sea bed has a shield (2) trailing behind it to support the walls of the trench. This prevents the walls caving in before the pipeline or cable settles down in the bottom of the trench. The shield is preferably constructed from inflatable flexible tubes. <IMAGE>
Description
SPECIFICATION
Trenching plough
This invention relates to a towable trenching plough and more particularly to a trenching plough suitable for burying a pipeline or cable at an underwater site.
Pipelines and cables have previously been buried under the sea bed by means of trenching devices which are towed, usually by a surface vessel. Two type of trenching device have been used: one employs jets of water to make a trench into which the pipeline or cable settles, the other employs a share to cut the trench and is hereafter referred to as a trenching plough.
Trenching ploughs usually have some part which passes under the pipeline or cable and consequently the latter is often lifted a small distance from the sea bed before it is guided into the trench. The portion of the pipeline or cable thus lifted into a gently curving configuration clear of the sea bed is referred to as a span. Under certain conditions, the walls of the trench tend to collapse before the end of the span contacts the bottom of the trench, with the result that the burial may not always be to the required depth.
It is an object of the present invention to provide equipment to counteract this tendency.
Thus, according to the present invention there is provided a trenching plough for cutting a trench for a pipeline or cable in the sea bed having a shield trailing behind it to support the walls of the trench where the pipeline or cable spans.
The shield can be made of flexible material attached to the rear portion of the trenching plough to occupy the trench where the pipeline or cable spans.
The shield can be made of a plurality of tubes, conveniently inflatable by water and arranged to lie lengthwise in the trench.
In the deflated state the shield is preferably foldable and/or telescopic and can conveniently be extended by introducing water to effect inflation.
Preferably a number of tubes are provided, some of which are disposed above others and preferably some of the upper tubes are of relatively small diameter in relation to the lower tubes. The upper tubes may be spaced apart to provide space for the passage of the cable or pipeline. The general construction of the plough to which the shield is attached may be as described in our copending
European Patent Application No. 0010915.
The invention is illustrated with reference to the accompanying drawings in which Figure 1 is a sectional view of a trench containing a shield attached to a trenching plough (not shown) and
Figure 2 is a similar view of the trench with a shield of modified construction.
Referring to Figure 1 the shield indicated generally by numeral 2 is shown located in a trench 4 of generally trapezoidal shape. The shield 4 comprises six inflated rubber tubes 6 each about 30 m long. The tubes 6 are foldable when deflated and can be extended and inflated by pumping in water.
In Figure 2 the shield 3 comprises four tubes of the same type as in Figure 1 but includes four further, smaller tubes 8 whose diameter is about half the diameter of the larger tubes 7.
The pipeline 10 being trenched passes between the tubes 8 and over the tubes 7.
1. A trenching plough for cutting a trench for a pipeline or cable in the sea bed having a shield trailing behind it to support the walls of the trench where the pipeline or cable spans.
2. A trenching plough according to claim 1 wherein the shield is flexible.
3. A trenching plough according to claim 2 wherein the shield comprises a plurality of inflatable tubes.
4. A trenching plough according to claim 3 wherein the tubes are substantially parallel and in layers.
5. A trenching plough according to claim 4 wherein the tubes in the upper layer(s) are of smaller diameter than those in the lower layer(s).
6. A trenching plough according to any of claims 3-5 wherein the tubes are inflatable by water.
7. A trenching plough as hereinbefore described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (7)
1. A trenching plough for cutting a trench for a pipeline or cable in the sea bed having a shield trailing behind it to support the walls of the trench where the pipeline or cable spans.
2. A trenching plough according to claim 1 wherein the shield is flexible.
3. A trenching plough according to claim 2 wherein the shield comprises a plurality of inflatable tubes.
4. A trenching plough according to claim 3 wherein the tubes are substantially parallel and in layers.
5. A trenching plough according to claim 4 wherein the tubes in the upper layer(s) are of smaller diameter than those in the lower layer(s).
6. A trenching plough according to any of claims 3-5 wherein the tubes are inflatable by water.
7. A trenching plough as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08402585A GB2134567B (en) | 1983-02-05 | 1984-02-01 | Trenching plough |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB838303248A GB8303248D0 (en) | 1983-02-05 | 1983-02-05 | Trenching plough |
GB08402585A GB2134567B (en) | 1983-02-05 | 1984-02-01 | Trenching plough |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8402585D0 GB8402585D0 (en) | 1984-03-07 |
GB2134567A true GB2134567A (en) | 1984-08-15 |
GB2134567B GB2134567B (en) | 1986-11-05 |
Family
ID=26285150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08402585A Expired GB2134567B (en) | 1983-02-05 | 1984-02-01 | Trenching plough |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2134567B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2590958A1 (en) * | 1985-12-04 | 1987-06-05 | Geodia | Method and device for weighting down a pipeline continuously buried in a trench with temporarily supported side walls |
FR2597187A1 (en) * | 1986-04-14 | 1987-10-16 | Geodia | Method and device for provisionally supporting the walls of a trench |
GB2200155A (en) * | 1986-12-12 | 1988-07-27 | Comporgan Rendszer Kozos Vall | A method for the construction of catchwater drains, drain ribs or supporting ribs, temporary supporting structures and water collecting-aquiferous blocks therefor |
EP0288644A1 (en) * | 1987-04-21 | 1988-11-02 | Geodia | Method and apparatus for the provisional shoring of trench walls |
US4806049A (en) * | 1986-04-14 | 1989-02-21 | Geodia | Process and device for temporarily supporting the walls of a trench |
WO2001084184A2 (en) * | 2000-05-03 | 2001-11-08 | Geco As | Marine seismic surveying |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1228372A (en) * | 1967-05-03 | 1971-04-15 | ||
GB1240202A (en) * | 1969-08-05 | 1971-07-21 | Hepworth Iron Co Ltd | Improvements in or relating to the laying of piping |
GB1301405A (en) * | 1971-01-14 | 1972-12-29 | ||
GB1372479A (en) * | 1971-11-15 | 1974-10-30 | Furukawa Electric Co Ltd | Submarine cable-burying devices |
GB1400095A (en) * | 1972-06-07 | 1975-07-16 | Kokusai Cable Ship Co Ltd | Ditching machine for submarine cable |
GB1473253A (en) * | 1974-07-19 | 1977-05-11 | Maritime Dexpertises Comex Com | Self-propelled machine for sea-bed work |
GB2006302A (en) * | 1977-10-18 | 1979-05-02 | Mobell Marine Ltd | Trench-Jetting Apparatus |
GB1565418A (en) * | 1976-07-21 | 1980-04-23 | Mcdermott & Co Inc J Ray | Apparatus for entrenching a submerged pipeline in a seabed |
-
1984
- 1984-02-01 GB GB08402585A patent/GB2134567B/en not_active Expired
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1228372A (en) * | 1967-05-03 | 1971-04-15 | ||
GB1240202A (en) * | 1969-08-05 | 1971-07-21 | Hepworth Iron Co Ltd | Improvements in or relating to the laying of piping |
GB1301405A (en) * | 1971-01-14 | 1972-12-29 | ||
GB1372479A (en) * | 1971-11-15 | 1974-10-30 | Furukawa Electric Co Ltd | Submarine cable-burying devices |
GB1400095A (en) * | 1972-06-07 | 1975-07-16 | Kokusai Cable Ship Co Ltd | Ditching machine for submarine cable |
GB1473253A (en) * | 1974-07-19 | 1977-05-11 | Maritime Dexpertises Comex Com | Self-propelled machine for sea-bed work |
GB1565418A (en) * | 1976-07-21 | 1980-04-23 | Mcdermott & Co Inc J Ray | Apparatus for entrenching a submerged pipeline in a seabed |
GB2006302A (en) * | 1977-10-18 | 1979-05-02 | Mobell Marine Ltd | Trench-Jetting Apparatus |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2590958A1 (en) * | 1985-12-04 | 1987-06-05 | Geodia | Method and device for weighting down a pipeline continuously buried in a trench with temporarily supported side walls |
FR2597187A1 (en) * | 1986-04-14 | 1987-10-16 | Geodia | Method and device for provisionally supporting the walls of a trench |
US4806049A (en) * | 1986-04-14 | 1989-02-21 | Geodia | Process and device for temporarily supporting the walls of a trench |
GB2200155A (en) * | 1986-12-12 | 1988-07-27 | Comporgan Rendszer Kozos Vall | A method for the construction of catchwater drains, drain ribs or supporting ribs, temporary supporting structures and water collecting-aquiferous blocks therefor |
EP0288644A1 (en) * | 1987-04-21 | 1988-11-02 | Geodia | Method and apparatus for the provisional shoring of trench walls |
WO2001084184A2 (en) * | 2000-05-03 | 2001-11-08 | Geco As | Marine seismic surveying |
WO2001084184A3 (en) * | 2000-05-03 | 2002-05-23 | Geco As | Marine seismic surveying |
GB2378759A (en) * | 2000-05-03 | 2003-02-19 | Westerngeco As | Marine seismic surveying |
GB2378759B (en) * | 2000-05-03 | 2004-10-20 | Westerngeco As | Marine seismic surveying |
Also Published As
Publication number | Publication date |
---|---|
GB8402585D0 (en) | 1984-03-07 |
GB2134567B (en) | 1986-11-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |