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US 5,205,364 AGranted
Process and drilling equipment for sinking a well in underground rock formations
OwnerRainer Juergens, Friedhelm Makohlinventors
Life of this patent
Estimating the term…
Abstract
The present invention is a drilling tool including a telescoping assembly for transmitting hydraulic force to the drill bit at the bottom of the tool. The internal hydraulic characteristics of the tool may be varied to vary the force through extension and retraction of the telescoping assembly.
Claims25
A process for sinking a well in underground rock formations using a drilling tool suspended from a drill casing and having a drill bit disposed at the leading end thereof, said drilling tool including an axially telescoping assembly therein, comprising:
- supplying said drilling tool with a flow of drilling mud through said drill casing during a drilling operation;
- transferring an hydraulic force generated by said flow of drilling mud to said drill bit through said axially telescoping assembly;
- and
- varying the surface area within said drill tool on which said flow of drilling mud acts.
1 more element
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescope assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud.
2 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- wherein said inner tubular part is on the drill bit end of said telescopic assembly, and includes a piston part having a piston face facing the flow of drilling mud;
- wherein said piston part comprises a ring sealed on its circumference with respect to a cylinder wall area of said outer tubular part;
- and
- wherein said ring piston part comprises a separate component detachably secured to said inner tubular part, and said cylinder wall area is located on a component detachably secured to said outer tubular part.
6 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- wherein said at least one pressure face comprises a plurality of axially separated pressure faces.
3 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- wherein said means for varying the internal hydraulic characteristics of said apparatus are selectively actuable by varying the length of extension of said telescopic assembly.
3 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- further including bypass channel means associated with said outer tubular part, said bypass channel means being progressively actuable for reducing pressure in said drilling mud flow by extraction of said inner tubular part from said outer tubular part.
3 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- wherein the square of the outer diameter of the outer tubular part of the telescopic assembly divided by the square of the diameter of the largest pressure face yields a ratio value in the range of substantially 1.5 to 2.5.
3 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- wherein said at least one telescopic assembly comprises a plurality of telescopic assemblies;
- and
- wherein at least one of said plurality of telescopic assemblies is adapted to become operable for varying said internal hydraulic characteristics before another of said plurality of telescopic assemblies.
5 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- wherein said inner tubular part is on the drill bit end of said telescopic assembly, and includes a piston part having a piston face facing the flow of drilling mud;
- wherein said piston part comprises a differential piston;
- and
- wherein said differential piston is disposed in sealing engagement between coaxial cylinder wall areas on said inner and outer tubular parts and is axially movable over a limited extent relative thereto.
6 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- wherein said inner tubular part is on the drill bit end of said telescopic assembly, and includes a piston part having a piston face facing the flow of drilling mud;
- and
- wherein said piston part comprises a differential piston;
- further including a bushing slidable on the cylinder wall area of said inner tubular part, sealed at its lower end with respect thereto, and providing a cylinder wall area on its exterior for said differential piston.
6 more elements
A drilling apparatus for sinking a well in underground rock formations, adapted for suspension from a drill casing and having a rotary drill bit disposed at its leading end, including:
- at least one telescopic assembly including an outer tubular part and an inner tubular part adapted for axial reciprocal movement within the outer tubular part, one of said parts being secured to said drill casing and the other having said drill bit disposed therefrom;
- means for rotational coupling of said inner and outer tubular parts;
- at least one pressure face on the part of said telescopic assembly secured to said drill bit for transmitting an axial hydraulic force generated by a flow of drilling mud through said tool;
- and
- means for varying the internal hydraulic characteristics of said apparatus which generate said hydraulic force responsive to said flow of drilling mud;
- wherein said inner tubular part is on the drill bit end of said telescopic assembly, and includes a piston part having a piston face facing the flow of drilling mud;
- and
- wherein said piston part comprises a ring sealed on its circumference with respect to a cylinder wall area of said outer tubular part;
- further including a tubular nozzle body on said outer tubular part for engaging said inner tubular part, said nozzle body defining an annular gap with said ring piston part for receiving said flow of drilling mud through said apparatus, said annular gap being variable in cross-sectional area with extension of said telescopic assembly and extraction of said inner tubular part from said outer tubular part.
6 more elements
Dependencies are inferred from the claim text.