EP0257744A2
Expired / Lapsed
EP
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Drilling system
Assignee: Framo Engineering AS
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Filing: 1987-07-01
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Granted: —
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Expires: 2007-07-01
Abstract
Abstract A drilling system comprises a drill string (1) incorporating inbuilt tubular conductors (25), a mud supply passage, and passages for protective or other fluids. The drill string can be advanced by selectively actuable pistons (51,60) exposed to drilling mud flow, by electrically driven traction units (71,74) engaging the drill hole wall or by a linear electric motor element (82) co-operating with a drill hole casing (24), which can be moved thereby relative to the drill string. The drill bit (106) of the drill unit is driven rotatably by an electric motor (111,112) or reciprocably by a linear electric motor (125). The drill unit can be of two relatively slidable parts, with fluid pressure, which may be generated within the unit (189) axially loading the drill bit. Drilling forms can be resisted by clamps (129) clamping the unit and/or the drill string to the drill hole wall. The drilling direction can be adjusted by means of these clamps.
Inventors
- 👤 Frank Mohn
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 07:08
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/068; E21B17/00; E21B17/003; E21B17/18; E21B4/00; E21B4/006; E21B4/04; E21B4/18; E21B47/00; E21B47/12
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
40 words
A drilling system comprising a drill string extending from topside equipment to a drill unit for performing a drilling operation, the drill string incorporating as an integral part thereof electric conductor means capable of transmission of power and/or communication signals.
Claim 2
Dependent Claim
40 words
A drilling system comprising a drill string extending from topside equipment to a drill unit for performing a drilling operation, the drill string incorporating as an integral part thereof electric conductor means capable of transmission of power and/or communication signals.
Claim 3
Dependent Claim
23 words
A system as claimed in claim 1 wherein the drill string comprises a drill pipe containing tubular conductor means constituting the conductor means.
Claim 4
Dependent Claim
34 words
A system as claimed in claim 1 wherein the drill string comprises a drill pipe and wherein the conductor means comprises a plurality of arcuate conductor portions or segments received within the drill pipe.
Claim 5
Dependent Claim
45 words
A system as claimed in claim 2 or 3 wherein the conductor means is concentrically related to the drill pipe and to a tubular mud liner also received within the drill pipe and defining a passage for supply of drilling mud to the drill unit.
Claim 6
Dependent Claim
43 words
A system as claimed in claim 1, 2, 3 or 4 wherein the conductor means co-operates with the drill pipe and/or with piping internal to the drill pipe to provide one or more fluid supply and/or return passage for insulating and/or hydraulic fluid.
Claim 7
Independent Claim
43 words
A system as claimed in any preceding claim having at at least one position on the drill string a drive unit selectively operable by power supplied and/or control signals transmitted by the conductor means to move the drill string along a drill hole.
Claim 8
Dependent Claim
44 words
A drilling system comprising a drill string for extending from topside equipment to a drill unit for performing a drilling operation, wherein a drive means is located at at least one position on the drill string for effecting movement thereof along a drill hole.
Claim 9
Dependent Claim
44 words
A drilling system comprising a drill string for extending from topside equipment to a drill unit for performing a drilling operation, wherein a drive means is located at at least one position on the drill string for effecting movement thereof along a drill hole.
Claim 10
Dependent Claim
44 words
A system as claimed in claim 6 or 7 wherein the drive means comprises at least one piston element carried externally by the drill string and selectively responsive to the flow of drilling mud or other fluid within the system to effect the movement.
Claim 11
Dependent Claim
33 words
A system as claimed in claim 6 or 7 wherein the drive means comprises an electrically powered traction means carried externally by the drill string for driving engagement with the drill hole wall.
Claim 12
Dependent Claim
54 words
A system as claimed in claim 6 or 7 wherein the drive means comprises a linear electric motor of which one of the stator and rotor is carried or constituted by the drill string and the other is carried or constituted by a casing lining a drill hole within which the drill string extends.
Claim 13
Dependent Claim
85 words
A drilling system comprising a drill string extending from topside equipment to a drill unit for performing a drilling operation, having electric wiring extending along the drill string, at least one first linear electric motor element externally around the drill string, and a drill hole casing around the motor element and constituting a second linear electric motor element co-operating therewith, whereby the first linear electric motor element can be energized to effect movement of the drill string or the casing relative to a drill hole.
Claim 14
Dependent Claim
85 words
A drilling system comprising a drill string extending from topside equipment to a drill unit for performing a drilling operation, having electric wiring extending along the drill string, at least one first linear electric motor element externally around the drill string, and a drill hole casing around the motor element and constituting a second linear electric motor element co-operating therewith, whereby the first linear electric motor element can be energized to effect movement of the drill string or the casing relative to a drill hole.
Claim 15
Independent Claim
47 words
A system comprising a drill string for connecting topside equipment to a drill unit, wherein the drill string carries spacer elements which can be selectively engaged with the drill hole wall to thereby transfer drilling reaction forces experienced by the drill string to the drill hole wall.
Claim 16
Independent Claim
47 words
A system comprising a drill string for connecting topside equipment to a drill unit, wherein the drill string carries spacer elements which can be selectively engaged with the drill hole wall to thereby transfer drilling reaction forces experienced by the drill string to the drill hole wall.
Claim 17
Independent Claim
40 words
A system as claimed in any preceding claim having in the drill string or drill unit at least one remotely controllable power generating unit powered electrically or by drilling mud or fluid pressure for effecting local control and/or sensor operations.
Claim 18
Dependent Claim
35 words
A drill hole system comprising a core or guide member for extending from topside equipment along a drill hole, and drive means for effecting relative movement between the core or guide member and surrounding piping.
Claim 19
Dependent Claim
35 words
A drill hole system comprising a core or guide member for extending from topside equipment along a drill hole, and drive means for effecting relative movement between the core or guide member and surrounding piping.
Claim 20
Dependent Claim
38 words
A system as claimed in claim 14 wherein the drive means comprises piston means responsive to drilling mud or other fluid flow and operative between the core or guide member and teh piping to effect the relative movement.
Claim 21
Dependent Claim
34 words
A system as claimed in claim 14 wherein the drive means comprises one or morer linear electric motor means operative between the core or guide member and the piping to effect the relative movement.
Claim 22
Dependent Claim
39 words
A system as claimed in claim 14, 15, or 16 having means for selectively clamping the leading end of the core or guide member to the drill hole wall to facilitate movement of the piping in the drill hole.
Claim 23
Dependent Claim
51 words
A drill unit for use in a drilling system, preferably a system as claimed in any one of claims 1-13, comprising a reciprocally guided drill bit and a linear electric motor for driving the drill bit in at least one stroke direction, directly or by way of a hydraulic drive connection.
Claim 24
Dependent Claim
34 words
A drill unit for use in a drilling system, preferably a system as claimed in any one of claims 1-13, comprising a drill bit secured to a drill shaft rotatable by an electric motor.
Claim 25
Dependent Claim
29 words
A drill unit as claimed in claim 19 wherein the drill shaft carries the rotor portion of the electric motor of which the stator portion surrounds the rotor portion.
Claim 26
Dependent Claim
25 words
A drill unit as claimed in claim 19 or 20 having a speed or torque converter operative between the leading and rear drive shaft portions.
Claim 27
Dependent Claim
71 words
A drill unit for use in a drilling system, preferably a system as claimed in any one of claims 1-13, comprising a leading portion mounting a drill bit, a rear portion secured to a drill string, the leading portion being movable axially of the drill bit relative to the rear portion, and fluid pressure means acting between the leading and rear portions to load the drill bit in the drilling direction.
Claim 28
Dependent Claim
51 words
A drill unit as claimed in claim 19, 20 or 21 wherein the drill bit is journalled in a leading portion of the unit which is axially movable relative to the rear portion of the unit, and wherein fluid pressure means is operable to urge the leading and rear portions apart.
Claim 29
Dependent Claim
35 words
A drill unit, preferably as claimed in any one of claims 18-23, including clamping means selectively engageable with the wall of a drill hole to provide resistance to drilling forces experienced by the drill bit.
Claim 30
Dependent Claim
29 words
A drill unit as claimed in claim 24 when dependent on claim 22 or 23 wherein the clamping means are located on the rear portion of the drill unit.
Claim 31
Dependent Claim
36 words
A drill unit as claimed in claim 24 or 25 wherein the clamping means are selectively adjustable to orientate the axis of the drill bit at a desired angle to the axis of the drill hole.
Claim 32
Dependent Claim
20 words
A drill unit as claimed in claim 24, 25 or 26 wherein the clamping means are operable by fluid pressure.
Claim 33
Dependent Claim
19 words
A drill unit as claimed in any one of claims 22-27 having therein means for generating the fluid pressure.
References Cited (Backward Citations)
No citation records indexed.
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