US3899032A - Method and apparatus for deviating conductor casing - Google Patents

Method and apparatus for deviating conductor casing Download PDF

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US3899032A
US3899032A US451614A US45161474A US3899032A US 3899032 A US3899032 A US 3899032A US 451614 A US451614 A US 451614A US 45161474 A US45161474 A US 45161474A US 3899032 A US3899032 A US 3899032A
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conductor
conductor casing
substratum
water
guide members
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US451614A
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Thomas E Rees
Frank D Priebe
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Cities Service Oil Co
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Cities Service Oil Co
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    • 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
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets

Definitions

  • conductors have either been driven at a slant while the conductor remains uncurved, or the conductors have been precurved prior to their being driven into the substratum.
  • Conductors have also been conventionally slanted or curved during driving by forcing the conductors through a gamut of offset guide members attached to the substructure of the platform.
  • the guide members are positioned such as to have a general arcuate center line along the common axis of the respective guide members.
  • the present invention accomplishes its desired objects by broadly providing an apparatus and method for deviating conductor casing, or the like.
  • the apparatus comprises a drilling deck having at least one drilling aperture situated above an offshore body of water, at least one leg supportably attached to the drilling deck and extending downwardly to the bottom of the body of water, and a pile means slideably guided by at least one leg and connected to the structure for imbedding in a substratum of a body of water to rigidly secure the structure in place.
  • At least one first conductor casing is slideably situated within a drilling aperture for insertion and bending beneath the bottom and in the substratum; the first conductor casing includes a structure defining a conduit having a beveled end and a shoe member attaching to the beveled end and entirely covering the opening thereof.
  • the first conductor casing may include a structure defining a conduit having a beveled end, a partial shoe member attaching to the beveled end leaving an opening for internal communication with respect to the insides of the first conductor, and a jet means extending internally down the first conductor for feeding liquid from the surface through the opening at a high pressure for supplementing the deviation of the first conductor beneath the bottom and in the substratum.
  • the method for deviatingthe conductor casing, or the like comprises installing the anchored marine structure, extending the first conductor casing through the drilling aperture and downwardly relative to the drilling deck until contacting the bottom, and driving the beveled end of the first conductor casing beneath the bottom and into the substratum for bending therein.
  • the method also additionally comprises extending a jet means internally down the first conductor for feeding liquid from the surface through the opening to supplement deviation of the first conductor beneath the bottom and in the substratum.
  • FIG. 1 is a side elevational view of an anchored marine structure of a type contemplated including one fully set conductor casing having a beveled end entirely enclosed by a shoe and extending through guide members having an arcuate center line along the common axis of the respective guide members, and a second partially set conductor casing having a partial shoe covering the opening allowing an aperture for a jet means to emit high pressure fluid therethrough;
  • FIG. 2 is a partial enlarged view of the beveled end of a conductor having a shoe entirely covering the opening;
  • FIG. 3 is a horizontal sectional view taken along the plane of line 33 in FIG. 2;
  • FIG. 4 is a fragmentary enlarged view of a beveled end having a partial shoe attached thereto and a nozzle member extending through an opening for angular emission of a high pressure fluid pumped from the surface of the earth.
  • a marine structure is anchored in an off shore body of water 12 and includes a drilling deck 14 having drilling equipment, generally illustrated as 16, attached thereupon and including a rotary table 17.
  • Marine structure 10 has a drilling aperture 18 in the drilling deck 14 and legs 20 supportably attached to the deck 14 and extending downwardly to a bottom 22 in the water 12.
  • Each of legs 20 includes anchoring piles 24 which extend longitudinally therefrom. Piles 24 are slideably guided by legs 20 for imbedding into a penetratable substratum 26 to rigidly secure marine structure in place.
  • Structure 10 may additionally include vertically spaced guide members 28 and 30 which slideably receive a conduit conductor 32 and a plurality of conduit conductors 34 as they are passed downwardly there through for bending beneath the bottom 22 and in the substratum 26.
  • Guide members 28 are generally vertically registered such as to have the respective guide members 28 axially aligned.
  • Members 30 deviate from a general vertical alignment to define an essential arcuate center line along the common axis of the respective guide members 30.
  • Conduit conductors 34 have incremental lengths that interconnect with each other.
  • One of the conduit conductors 34 has its lower end connected to the upper end of the conductor 32 and the remaining plurality of conduit conductors 34 each have a lower end attaching to the upper end of a contiguous lower conduit conductor 34 as the lower end is advanced downwardly with respect to the drilling deck 14.
  • conductor 32 has a beveled end 36 having a horizontal plane occupying any suitable angular position with respect to the vertical axis thereof.
  • the angular position which the horizontal plane of the beveled end occupies with respect to the vertical axis is from between about 10 to about 85.
  • a shoe member 38 attaches to beveled end 36 to entirely cover the opening thereof.
  • the beveled end 36 has a partial shoe member 40 connecting thereto leaving an opending 42 for internal communication with respect to the insides of the conduit conductor 32.
  • a jet means generally illustrated as 44, extends internally down conduit conductors 32 and 34 for feeding liquid from the surface through the opening 42 for supplementing the deviation of the conductor 32 (and conductors 34) beneath the bottom 22 and in the substratum 36.
  • jet means 44 comprises a hose or pipe member 46 having a nozzle 48 connected thereto.
  • the marine structure 10 is installed on the bottom 22 of the body of water 12.
  • Conduit conductor 32 is subsequently extended through the drilling aperture 18 downwardly relative to the drilling deck 14 until it contacts the bottom 22. If the conductor 32 is not of sufficient length to reach the bottom 22 (as in many off shore bodies of water having great depths), then a plurality of interconnecting incremental lengths of the casing conductors 34 are added to conductor 32.
  • one of the conductors 34 would have its lower end connecting to the upper end of the conductor 32, and the remaining conductors 34 would each have a lower end attaching to the upper end of a contiguous lower conductor 34 as the lower ends thereof are advanced downwardly with respect to the drilling deck 14 and into the substratum 26.
  • conductor casing 32 may include a structure having either of two embodiments.
  • conduit conductor 32 has the shoe member 38 attached to the beveled end 36 and entirely covering the opening of the same.
  • conduit conductor 32 has the partial shoe member 40 attaching to the beveled end 36 leaving the opening 42 for internal communication with respect to the insides of the conductor.
  • the jet means 44 is extended internally down the conductors 34 and conductor 32 for feeding liquids from the surface through the opening 42 at a high pressure.
  • the jet means 44 preferably comprises a nozzle 48, and a hose or pipe member 44 connecting to the nozzle 48 and extending from the surface down through the insides of the conductors 34 and conductor 32.
  • the beveled end 36 includes a horizontal plane (with respect to the end 36) occupying an angular position of preferably from between about 30 to about with respect to the vertical axis thereof.
  • the conductor 32 (and the conductors 34) in this invention do not have to be necessarily precurved prior to their being driven into the substratum 26.
  • conduit conductor 32 and conductors 34 After conduit conductor 32 and conductors 34 have been extended through the drilling aperture 18, they are subsequently driven beneath the bottom 22 and into the substratum 26 for bending therein.
  • the driving force may be straight downward instead of at a slant.
  • Bending of the conductor 32 can be controlled by the orientation and the angle of the bevel of the beveled end 36. More specifically, the conductor 32 will bend in a direction which is away from the exposed face of the shoe member 38 and the extent of bending is determined by the beveled angle. As driving continues, the soil above the beveled end 36 can be relied upon to some extent to provide lateral resistance against buckling of the conductor 32 and the conductors 34 which are attached thereto.
  • high pressure fluid exiting from the nozzle 48 of the jet means 44 is forcefully shot out at an angle to wallow out a tunnel ahead of the conductor 32 into which it is subsequently driven.
  • Use of the alternate embodiment of the invention reduces the force required to drive the conductor 32 and attaching conductors 34 downward and outward as they sink deeper and deeper into the earth.
  • Use of the alternate embodiment also provides a means for greater curvature of the conductor 32 and attaching conductors 34 as they are driven downwardly.
  • one or more means for guiding may be situated on the structure to slideably receive the conductor 32 and conductors 34 as they are passed downwardly therethrough.
  • the means for guiding are attached to the platform at or above the mud line and provide additional resistance to buckling.
  • the guide means may comprise a plurality of conductor casing guide members 28 vertically spaced apart and generally vertically registered such as to have the respective guide members 28 axially aligned, or guide means may include a plurality of conductor casing guide members 30 also vertically spaced apart and deviating from a general vertical alignment to define an essentially arcu ate center line along the common axis of the respective guide members 30.
  • the latter guide means provides for more bending and deviation beneath the bottom 22, especially when the partial shoe-jet means is utilized.
  • the shoe 38 or partial shoe 40 of the beveled end 36 can be knocked off, blown off, or drilled through in order to provide an open passageway for a drilling string which is utilized for slant drilling towards a petroleum producing formation.
  • a marine structure anchored in an offshore body of water for deviating conductor casing, or the like comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, a pile means slideably guided by said at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place, and at least one first conductor casing slideably situated within said drilling aperture for insertion and bending beneath said bottom and in said substratum, said first conductor casing including a structure defining a conduit having a beveled end and a shoe member attaching to said beveled end and entirely covering the opening thereof, said beveled end of said first conductor casing bends in said substratum when driven into said same.
  • the marine structure of claim 1 additionally having attached thereto a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
  • the marine structure of claim 3 additionally including a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connected to the upper end of said first conductor and the remaining of said plurality of said second conductors each have a lower end attaching to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
  • said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
  • said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essential arcuate center line along the common axis of said respective guide members.
  • a marine structure anchored in an offshore body of water for deviating conductor casing, or the like comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, a pile means slideably guided by said at least one leg and connecting to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place, and at least one first conductor casing slideably situated within said drilling aperture for insertion and bending beneath said bottom and in said substratum, said first conductor casing including a structure defining a conduit haaving a beveled end, a partial shoe member attaching to said beveled end leaving an opening for internal communication with respect to the insides of said first conductor, and a jet means extending internally down said first conductor for feeding liquid from the surface through said opening at a high pressure for supplementing the deviation of said first conductor beneath said bottom and in said substraturn.
  • the marine structure of claim 9 additionally including a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connecting to the upper end of said first conductor and the remaining of said plurality of said second conductors each have a lower end attaching to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
  • said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
  • said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define as essential arcuate center line along the common axis of said respective guide members.
  • a method for deviating conductor case, or the like, comprising:
  • an anchored marine structure on the bottom of a body of water, said structure comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, and a pile means slideably guided by at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place;
  • first conductor casing extending a first conductor casing through said drilling aperture and downwardly relative to said drilling deck until contacting said bottom of said body of water, said first conductor casing including a structure defining a conduit having a beveled end and a shoe member attaching to said beveled end and entirely covering the opening thereof;
  • said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
  • said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essentially arcuate center line along the common axis of said respective guide members.
  • a method for deviating conductor case, or the like comprising:
  • an anchored marine structure on the bottom of a body of water, said structure comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, and a pile means slideably guided by at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place;
  • first conductor casing through said drilling aperture and downwardly relative to said drilling deck until contacting said bottom, said first conductor casing including a structure defining a conduit having a beveled end, a partial shoe member attaching to said beveled end leaving an opening for internal communication with respect to the insides of said first conductor; c. extending a jet means internally down said first conductor for feeding liquid from the surface through said opening at a high pressure; and
  • said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
  • said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essential arcuate center line along the common axis of said respective guide members.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
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Abstract

A method and apparatus for deviating conductor casing, or the like, as it is being driven into a substratum. The conductor casing has an enclosed beveled end, or a partial enclosed beveled end providing an opening for the emission high pressure fluid fed from the surface.

Description

United States Patent Rees et a1. Aug. 12, 1975 [54] METHOD AND APPARATUS FOR 2,324,102 7/1943 Miller et a1. 175/61 X DEVlATING CONDUCTOR CASING 2,783,972 3/1957 Fehlmann 3,474,630 10/ 1969 Pogonowskl [75] lnventors: Thomas E. Rees, Tulsa, Okla; 3521405 3 1970 Coyne et a1 Frank D. Priebe, Houston, Tex. 3,610,346 10/1971 Ziober 3,670,507 6/1972 Mott et a1. [731 Assgneel Company Tulsa 3,687,204 8/1972 Marshall 175/9 Okla.
[22] Filed; Man 15 97 Primary Examiner-Frank L. Abbott Appl. No.: 451,614
References Cited UNITED STATES PATENTS 3/1933 Dana et a1. 175/9 Assistant ExaminerRichard E. Favreau Attorney, Agent, or FirmJohn W. Carpenter ABSTRACT 24 Claims, 4 Drawing Figures METHOD AND APPARATUS FOR DEVIATING CONDUCTOR CASING BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to conductor casing of oil wells. More specifically, this invention provides a method and apparatus for deviating conductor casing as it is being driven into the substratum.
2. Description of the Prior Art There are many conventional means in the art of exploratory drilling of off-shore wells from platforms which expeditiously provide for many exploratory and- /or producing wells to be drilled from each platform. A popular method is the utilization of curved or slanted well conductors. This method essentially doubles the acreage that can be reached when drilling from a single platform structure.
In accordance with such popular prior art method, conductors have either been driven at a slant while the conductor remains uncurved, or the conductors have been precurved prior to their being driven into the substratum. Conductors have also been conventionally slanted or curved during driving by forcing the conductors through a gamut of offset guide members attached to the substructure of the platform. The guide members are positioned such as to have a general arcuate center line along the common axis of the respective guide members. These popular prior art means for deviating conductor casing are deficient because of not rendering versatility in drilling plans, and the amount of curvature that can be obtained in the conductor casing is somewhat limited. By utilizing conventional curving methods, the position of the guide members have to be preplanned when the platform is constructed and on numerous occasions, depending on what has been discovered in early drilling operations, drilling plans have been altered after drilling has been commenced. Therefore, what is needed and what has been invented by us is a method and apparatus for deviating conductor casing, or the like, without the foregoing deficiencies associated with the prior art methods and apparatuses.
SUMMARY OF THE INVENTION The present invention accomplishes its desired objects by broadly providing an apparatus and method for deviating conductor casing, or the like. The apparatus comprises a drilling deck having at least one drilling aperture situated above an offshore body of water, at least one leg supportably attached to the drilling deck and extending downwardly to the bottom of the body of water, and a pile means slideably guided by at least one leg and connected to the structure for imbedding in a substratum of a body of water to rigidly secure the structure in place. At least one first conductor casing is slideably situated within a drilling aperture for insertion and bending beneath the bottom and in the substratum; the first conductor casing includes a structure defining a conduit having a beveled end and a shoe member attaching to the beveled end and entirely covering the opening thereof. Alternatively, the first conductor casing may include a structure defining a conduit having a beveled end, a partial shoe member attaching to the beveled end leaving an opening for internal communication with respect to the insides of the first conductor, and a jet means extending internally down the first conductor for feeding liquid from the surface through the opening at a high pressure for supplementing the deviation of the first conductor beneath the bottom and in the substratum. The method for deviatingthe conductor casing, or the like, comprises installing the anchored marine structure, extending the first conductor casing through the drilling aperture and downwardly relative to the drilling deck until contacting the bottom, and driving the beveled end of the first conductor casing beneath the bottom and into the substratum for bending therein. When the alternate structure of the first conductor is utilized, the method also additionally comprises extending a jet means internally down the first conductor for feeding liquid from the surface through the opening to supplement deviation of the first conductor beneath the bottom and in the substratum.
It is therefore an object of the present invention to provide a method and apparatus for deviating conductor casing.
It is another object of the present invention to provide a method and apparatus for deviating conductor casing without the necessity of driving the conductor casing in a slant, or the utilization of guide members.
It is yet another object of the present invention to provide a method and apparatus for deviating drive pipe, surface casing, or the like, without having to preplan the position of guides in the substructure of the.
platform when the platform is constructed.
These, together with various ancillary objects and- BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevational view of an anchored marine structure of a type contemplated including one fully set conductor casing having a beveled end entirely enclosed by a shoe and extending through guide members having an arcuate center line along the common axis of the respective guide members, and a second partially set conductor casing having a partial shoe covering the opening allowing an aperture for a jet means to emit high pressure fluid therethrough;
FIG. 2 is a partial enlarged view of the beveled end of a conductor having a shoe entirely covering the opening;
FIG. 3 is a horizontal sectional view taken along the plane of line 33 in FIG. 2; and
FIG. 4 is a fragmentary enlarged view of a beveled end having a partial shoe attached thereto and a nozzle member extending through an opening for angular emission of a high pressure fluid pumped from the surface of the earth.
DETAILED DESCRIPTION OF THE INVENTION Referring in detail now to the drawings wherein like or similar parts of the invention are identified by like reference numerals, a marine structure, generally illustrated as 10, is anchored in an off shore body of water 12 and includes a drilling deck 14 having drilling equipment, generally illustrated as 16, attached thereupon and including a rotary table 17. Marine structure 10 has a drilling aperture 18 in the drilling deck 14 and legs 20 supportably attached to the deck 14 and extending downwardly to a bottom 22 in the water 12.
Each of legs 20 includes anchoring piles 24 which extend longitudinally therefrom. Piles 24 are slideably guided by legs 20 for imbedding into a penetratable substratum 26 to rigidly secure marine structure in place. Structure 10 may additionally include vertically spaced guide members 28 and 30 which slideably receive a conduit conductor 32 and a plurality of conduit conductors 34 as they are passed downwardly there through for bending beneath the bottom 22 and in the substratum 26. Guide members 28 are generally vertically registered such as to have the respective guide members 28 axially aligned. Members 30 deviate from a general vertical alignment to define an essential arcuate center line along the common axis of the respective guide members 30. Conduit conductors 34 have incremental lengths that interconnect with each other. One of the conduit conductors 34 has its lower end connected to the upper end of the conductor 32 and the remaining plurality of conduit conductors 34 each have a lower end attaching to the upper end of a contiguous lower conduit conductor 34 as the lower end is advanced downwardly with respect to the drilling deck 14.
ln one embodiment of the invention (see FIG. 2) conductor 32 has a beveled end 36 having a horizontal plane occupying any suitable angular position with respect to the vertical axis thereof. Preferably, the angular position which the horizontal plane of the beveled end occupies with respect to the vertical axis is from between about 10 to about 85. A shoe member 38 attaches to beveled end 36 to entirely cover the opening thereof.
In a second embodiment of the invention (see FIG. 4) the beveled end 36 has a partial shoe member 40 connecting thereto leaving an opending 42 for internal communication with respect to the insides of the conduit conductor 32. A jet means, generally illustrated as 44, extends internally down conduit conductors 32 and 34 for feeding liquid from the surface through the opening 42 for supplementing the deviation of the conductor 32 (and conductors 34) beneath the bottom 22 and in the substratum 36. Preferably, jet means 44 comprises a hose or pipe member 46 having a nozzle 48 connected thereto.
With continual reference to the drawings for operation of the invention, the marine structure 10 is installed on the bottom 22 of the body of water 12. Conduit conductor 32 is subsequently extended through the drilling aperture 18 downwardly relative to the drilling deck 14 until it contacts the bottom 22. If the conductor 32 is not of sufficient length to reach the bottom 22 (as in many off shore bodies of water having great depths), then a plurality of interconnecting incremental lengths of the casing conductors 34 are added to conductor 32. In such cases, one of the conductors 34 would have its lower end connecting to the upper end of the conductor 32, and the remaining conductors 34 would each have a lower end attaching to the upper end of a contiguous lower conductor 34 as the lower ends thereof are advanced downwardly with respect to the drilling deck 14 and into the substratum 26.
As aforementioned, conductor casing 32 may include a structure having either of two embodiments. In one embodiment, conduit conductor 32 has the shoe member 38 attached to the beveled end 36 and entirely covering the opening of the same. in another embodiment, conduit conductor 32 has the partial shoe member 40 attaching to the beveled end 36 leaving the opening 42 for internal communication with respect to the insides of the conductor. In this latter embodiment, the jet means 44 is extended internally down the conductors 34 and conductor 32 for feeding liquids from the surface through the opening 42 at a high pressure. As was also previously mentioned, the jet means 44 preferably comprises a nozzle 48, and a hose or pipe member 44 connecting to the nozzle 48 and extending from the surface down through the insides of the conductors 34 and conductor 32. The beveled end 36 includes a horizontal plane (with respect to the end 36) occupying an angular position of preferably from between about 30 to about with respect to the vertical axis thereof. The conductor 32 (and the conductors 34) in this invention do not have to be necessarily precurved prior to their being driven into the substratum 26.
After conduit conductor 32 and conductors 34 have been extended through the drilling aperture 18, they are subsequently driven beneath the bottom 22 and into the substratum 26 for bending therein. The driving force may be straight downward instead of at a slant. As the conductor 32 is driven downward through the earth, it gradually starts to bend so that it curves outward from the drilling deck 14. Bending occurs below the bottom 22 and in the substratum 26 and results from lateral forces being applied against the shoe member 38 or 40 as the conductor 32 resists being driven into the substratum 26. If the end of the conductor 32 was not beveled, the resistive force would be only upward and there would be no significant bending in a desired direction. Bending of the conductor 32 can be controlled by the orientation and the angle of the bevel of the beveled end 36. More specifically, the conductor 32 will bend in a direction which is away from the exposed face of the shoe member 38 and the extent of bending is determined by the beveled angle. As driving continues, the soil above the beveled end 36 can be relied upon to some extent to provide lateral resistance against buckling of the conductor 32 and the conductors 34 which are attached thereto.
In the alternate embodiment of the invention, high pressure fluid exiting from the nozzle 48 of the jet means 44 is forcefully shot out at an angle to wallow out a tunnel ahead of the conductor 32 into which it is subsequently driven. Use of the alternate embodiment of the invention reduces the force required to drive the conductor 32 and attaching conductors 34 downward and outward as they sink deeper and deeper into the earth. Use of the alternate embodiment also provides a means for greater curvature of the conductor 32 and attaching conductors 34 as they are driven downwardly.
If needed, one or more means for guiding may be situated on the structure to slideably receive the conductor 32 and conductors 34 as they are passed downwardly therethrough. The means for guiding are attached to the platform at or above the mud line and provide additional resistance to buckling. The guide means may comprise a plurality of conductor casing guide members 28 vertically spaced apart and generally vertically registered such as to have the respective guide members 28 axially aligned, or guide means may include a plurality of conductor casing guide members 30 also vertically spaced apart and deviating from a general vertical alignment to define an essentially arcu ate center line along the common axis of the respective guide members 30. The latter guide means provides for more bending and deviation beneath the bottom 22, especially when the partial shoe-jet means is utilized.
Once the conductor has been driven to the desired depth (usually l00200 feet within the earth) the shoe 38 or partial shoe 40 of the beveled end 36 can be knocked off, blown off, or drilled through in order to provide an open passageway for a drilling string which is utilized for slant drilling towards a petroleum producing formation.
While the present invention has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosure, and in some instances some features of the invention will be employed without a corresponding use of other features without departing from the scope of the invention as set forth.
We claim:
1. A marine structure anchored in an offshore body of water for deviating conductor casing, or the like, comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, a pile means slideably guided by said at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place, and at least one first conductor casing slideably situated within said drilling aperture for insertion and bending beneath said bottom and in said substratum, said first conductor casing including a structure defining a conduit having a beveled end and a shoe member attaching to said beveled end and entirely covering the opening thereof, said beveled end of said first conductor casing bends in said substratum when driven into said same.
2. The marine structure of claim 1 additionally having attached thereto a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
3. The marine structure of claim 2 wherein a horizontal plane of said beveled end occupies an angular position of from between about to about 85 with respect to the vertical axis thereof.
4. The marine structure of claim 3 additionally including a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connected to the upper end of said first conductor and the remaining of said plurality of said second conductors each have a lower end attaching to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
5. The marine structure of claim 4 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
6. The marine structue of claim 4 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essential arcuate center line along the common axis of said respective guide members.
7. A marine structure anchored in an offshore body of water for deviating conductor casing, or the like, comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, a pile means slideably guided by said at least one leg and connecting to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place, and at least one first conductor casing slideably situated within said drilling aperture for insertion and bending beneath said bottom and in said substratum, said first conductor casing including a structure defining a conduit haaving a beveled end, a partial shoe member attaching to said beveled end leaving an opening for internal communication with respect to the insides of said first conductor, and a jet means extending internally down said first conductor for feeding liquid from the surface through said opening at a high pressure for supplementing the deviation of said first conductor beneath said bottom and in said substraturn.
8. The marine structure of claim 7 additionally having attached thereto a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
9. The marine structure of claim 8 wherein a horizontal plane of said beveled end occupies an angular position of from between about 10 to about with respect to the vertical axis thereof.
10. The marine structure of claim 9 additionally including a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connecting to the upper end of said first conductor and the remaining of said plurality of said second conductors each have a lower end attaching to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
11. The marine structure of claim 10 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
12. The marine structure of claim 10 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define as essential arcuate center line along the common axis of said respective guide members.
13. A method for deviating conductor case, or the like, comprising:
a. installing an anchored marine structure on the bottom of a body of water, said structure comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, and a pile means slideably guided by at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place;
b. extending a first conductor casing through said drilling aperture and downwardly relative to said drilling deck until contacting said bottom of said body of water, said first conductor casing including a structure defining a conduit having a beveled end and a shoe member attaching to said beveled end and entirely covering the opening thereof; and
c. driving said beveled end of said first conductor casing beneath said bottom and into said substratum for bending therein.
14. The process of claim 13 additionally including situating on said structure a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
15. The process of claim 14 wherein a horizontal plane of said beveled end occupies an angular position of from between about l to about 85 with respect to the vertical axis thereof.
16. The process of claim 15 additionally including adding to said first conductor casing a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connected to the upper end of said first conductor and the remaining of said plurality of said second conductors each have a lower end attached to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
17. The process of claim 16 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
18. The process of claim 16 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essentially arcuate center line along the common axis of said respective guide members.
19. A method for deviating conductor case, or the like, comprising:
a. installing an anchored marine structure on the bottom of a body of water, said structure comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, and a pile means slideably guided by at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place;
b. extending a first conductor casing through said drilling aperture and downwardly relative to said drilling deck until contacting said bottom, said first conductor casing including a structure defining a conduit having a beveled end, a partial shoe member attaching to said beveled end leaving an opening for internal communication with respect to the insides of said first conductor; c. extending a jet means internally down said first conductor for feeding liquid from the surface through said opening at a high pressure; and
d. driving said beveled end from said first conductor casing beneath said bottom and into said substratum for bending therein while emitting said high pressure liquid through said opening for supplementing the deviation of said first conductor beneath said bottom and in said substratum.
20. The process of claim 19 additionally including situating on said structure a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
21. The process of claim 20 wherein a horizontal plane of said beveled end occupies an angular position of from between about 10 to about with respect to the vertical axis thereof.
22. The process of claim 21 additionally including adding to said first conductor a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connecting to the upper end of said first conductor and the remaining of said plurality of said second conductors each having a lower end attaching to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
23. The process of claim 22 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
24. The process of claim 22 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essential arcuate center line along the common axis of said respective guide members.

Claims (24)

1. A marine structure anchored in an offshore body of water for deviating conductor casing, or the like, comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, a pile means slideably guided by said at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place, and at least one first conductor casing slideably situated within said drilling aperturE for insertion and bending beneath said bottom and in said substratum, said first conductor casing including a structure defining a conduit having a beveled end and a shoe member attaching to said beveled end and entirely covering the opening thereof, said beveled end of said first conductor casing bends in said substratum when driven into said same.
2. The marine structure of claim 1 additionally having attached thereto a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
3. The marine structure of claim 2 wherein a horizontal plane of said beveled end occupies an angular position of from between about 10* to about 85* with respect to the vertical axis thereof.
4. The marine structure of claim 3 additionally including a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connected to the upper end of said first conductor and the remaining of said plurality of said second conductors each have a lower end attaching to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
5. The marine structure of claim 4 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
6. The marine structue of claim 4 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essential arcuate center line along the common axis of said respective guide members.
7. A marine structure anchored in an offshore body of water for deviating conductor casing, or the like, comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, a pile means slideably guided by said at least one leg and connecting to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place, and at least one first conductor casing slideably situated within said drilling aperture for insertion and bending beneath said bottom and in said substratum, said first conductor casing including a structure defining a conduit haaving a beveled end, a partial shoe member attaching to said beveled end leaving an opening for internal communication with respect to the insides of said first conductor, and a jet means extending internally down said first conductor for feeding liquid from the surface through said opening at a high pressure for supplementing the deviation of said first conductor beneath said bottom and in said substratum.
8. The marine structure of claim 7 additionally having attached thereto a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
9. The marine structure of claim 8 wherein a horizontal plane of said beveled end occupies an angular position of from between about 10* to about 85* with respect to the vertical axis thereof.
10. The marine structure of claim 9 additionally including a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connecting to the upper end of said first conductor and the remaining of said plurality of said second conductors each have a lower end attaching to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
11. The marine structure of claim 10 wherein said guide means comprises a plurality of conductor casing guide members vertically sPaced apart and generally vertically registered such as to have the respective guide members axially aligned.
12. The marine structure of claim 10 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define as essential arcuate center line along the common axis of said respective guide members.
13. A method for deviating conductor case, or the like, comprising: a. installing an anchored marine structure on the bottom of a body of water, said structure comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, and a pile means slideably guided by at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place; b. extending a first conductor casing through said drilling aperture and downwardly relative to said drilling deck until contacting said bottom of said body of water, said first conductor casing including a structure defining a conduit having a beveled end and a shoe member attaching to said beveled end and entirely covering the opening thereof; and c. driving said beveled end of said first conductor casing beneath said bottom and into said substratum for bending therein.
14. The process of claim 13 additionally including situating on said structure a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
15. The process of claim 14 wherein a horizontal plane of said beveled end occupies an angular position of from between about 10* to about 85* with respect to the vertical axis thereof.
16. The process of claim 15 additionally including adding to said first conductor casing a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connected to the upper end of said first conductor and the remaining of said plurality of said second conductors each have a lower end attached to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
17. The process of claim 16 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
18. The process of claim 16 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essentially arcuate center line along the common axis of said respective guide members.
19. A method for deviating conductor case, or the like, comprising: a. installing an anchored marine structure on the bottom of a body of water, said structure comprising a drilling deck having at least one drilling aperture and situated above said body of water, at least one leg supportably attached to said drilling deck and extending downwardly to the bottom of said body of water, and a pile means slideably guided by at least one leg and connected to said structure for imbedding in the substratum of said body of water to rigidly secure said structure in place; b. extending a first conductor casing through said drilling aperture and downwardly relative to said drilling deck until contacting said bottom, said first conductor casing including a structure defining a conduit having a beveled end, a partial shoe member attaching to said beveled end leaving an opening for internal communication with respect to the insides of said first conductor; c. extending a jet means internally down said first conductor for feeding liquid from the surface through said opening at a hIgh pressure; and d. driving said beveled end from said first conductor casing beneath said bottom and into said substratum for bending therein while emitting said high pressure liquid through said opening for supplementing the deviation of said first conductor beneath said bottom and in said substratum.
20. The process of claim 19 additionally including situating on said structure a means for guiding said first conductor casing, said guide means slideably receives said first conductor as it is passed downwardly therethrough.
21. The process of claim 20 wherein a horizontal plane of said beveled end occupies an angular position of from between about 10* to about 85* with respect to the vertical axis thereof.
22. The process of claim 21 additionally including adding to said first conductor a plurality of interconnecting incremental lengths of a second conductor casing, one of said second conductors having its lower end connecting to the upper end of said first conductor and the remaining of said plurality of said second conductors each having a lower end attaching to the upper end of a contiguous lower second conductor as the lower end is advanced downwardly with respect to said drilling deck and into said substratum.
23. The process of claim 22 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and generally vertically registered such as to have the respective guide members axially aligned.
24. The process of claim 22 wherein said guide means comprises a plurality of conductor casing guide members vertically spaced apart and deviating from a general vertical alignment to define an essential arcuate center line along the common axis of said respective guide members.
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US4027734A (en) * 1975-12-11 1977-06-07 Hebert & Co., Inc. Gurtler Deviated conductor driving system
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WO2011018432A1 (en) * 2009-08-11 2011-02-17 Mikkel L Hvidsteen Conductor casing deployment control system for oil or gas wells
US20130008664A1 (en) * 2011-07-07 2013-01-10 Graves Kyle S Above mudline whipstock for marine platform drilling operations
US8833463B2 (en) * 2011-07-07 2014-09-16 Apache Corporation Above mudline whipstock for marine platform drilling operations
WO2017014644A1 (en) * 2015-07-22 2017-01-26 Neodrill As Device and method for slanting a conductor casing
GB2556536A (en) * 2015-07-22 2018-05-30 Neodrill As Device and method for slanting a conductor casing
US10648248B2 (en) 2015-07-22 2020-05-12 Neodrill As Device and method for slanting a conductor casing
GB2556536B (en) * 2015-07-22 2021-04-28 Neodrill As Device and method for slanting a conductor casing

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