Patent US2075699A successfully refreshed from Google Patents.
Patent US3870112A successfully refreshed from Google Patents.
US3870112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for taking samples from loose ground layers
Assignee: IFP Energies nouvelles
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Filing: 1974-02-12
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Granted: 1975-03-11
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Expires: 1994-02-12
Abstract
Abstract A coring device comprising a tubular body provided at its lower end with a crown type drill bit. This crown bit has a central bore obturated by a plugshaped element. Under remote control, and under the action of a pressurized gas housed in a chamber, a core barrel of small wall thickness slidable along the plug-shaped elements is pushed downwardly through the annular space between the internal wall of the crown bit and the external wall of the plug, from a first position wherein this core barrel is locked in the tubular body to a second position in which the core barrel projects beyond the crown bit and penetrates the ground.
Inventors
- 👤 Yvon Castel
- 👤 Andre Castela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:04
CPC Classifications
E; E21; E21B; E21B25/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
264 words
A device for sampling cores from loose ground layers, comprising a rigid tubular body, a core barrel housed in said tubular body and slidable therein under the action of controlled propulsion means, from a first position, in which said core-barrel is secured through locking means to said tubular body, to a second position in which said core barrel at least partially projects beyond said tubular body and penetrates the loose ground layer, this rigid tubular body being adapted to be connected to a source of drilling fluid and to means for driving in rotation said tubular body and comprising, in combination, a crown-type drill bit provided with a bore through which said core barrel can slide from said first position to said second position, an obturator means for said core barrel, said obturator means being slidably mounted in said core barrel and being provided at its lower part with ground cutting elements, said obturator means being further connected to said core barrel and maintained substantially at the level of said drill bit in said first position of said core barrel, the lower end of said core barrel being also provided with ground cutting elements and being also located at the level of said drill bit in said first position of said core barrel, said lower end and said obturator means thus cooperating with said core barrel for obturating the bore of the drill bit by the cutting elements, thereby preventing the formation of a core within said bore in said first position which thus defines a position of full bore drilling of the device.
Claim 2
Independent Claim
264 words
A device for sampling cores from loose ground layers, comprising a rigid tubular body, a core barrel housed in said tubular body and slidable therein under the action of controlled propulsion means, from a first position, in which said core-barrel is secured through locking means to said tubular body, to a second position in which said core barrel at least partially projects beyond said tubular body and penetrates the loose ground layer, this rigid tubular body being adapted to be connected to a source of drilling fluid and to means for driving in rotation said tubular body and comprising, in combination, a crown-type drill bit provided with a bore through which said core barrel can slide from said first position to said second position, an obturator means for said core barrel, said obturator means being slidably mounted in said core barrel and being provided at its lower part with ground cutting elements, said obturator means being further connected to said core barrel and maintained substantially at the level of said drill bit in said first position of said core barrel, the lower end of said core barrel being also provided with ground cutting elements and being also located at the level of said drill bit in said first position of said core barrel, said lower end and said obturator means thus cooperating with said core barrel for obturating the bore of the drill bit by the cutting elements, thereby preventing the formation of a core within said bore in said first position which thus defines a position of full bore drilling of the device.
Claim 3
Independent Claim
264 words
A device for sampling cores from loose ground layers, comprising a rigid tubular body, a core barrel housed in said tubular body and slidable therein under the action of controlled propulsion means, from a first position, in which said corebarrel is secured through locking means to said tubular body, to a second position in which said core barrel at least partially projects beyond said tubular body and penetrates the loose ground layer, this rigid tubular body being adapted to be connected to a source of drilling fluid and to means for driving in rotation said tubular body and comprising, in combination, a crown-type drill bit provided with a bore through which said core barrel can slide from said first position to said second position, an obturator means for said core barrel, said obturator means being slidably mounted in said core barrel and being provided at its lower part with ground cutting elements, said obturator means being further connected to said core barrel and maintained substantially at the level of said drill bit in said first position of said core barrel, the lower end of said core barrel being also provided with ground cutting elements and being also located at the level of said drill bit in said first position of said core barrel, said lower end and said obturator means thus cooperating with said core barrel for obturating the bore of the drill bit by the cutting elements, thereby preventing the formation of a core within said bore in said first position which thus defines a position of full bore drilling of the device.
Claim 4
Independent Claim
264 words
A device for sampling cores from loose ground layers, comprising a rigid tubular body, a core barrel housed in said tubular body and slidable therein under the action of controlled propulsion means, from a first position, in which said corebarrel is secured through locking means to said tubular body, to a second position in which said core barrel at least partially projects beyond said tubular body and penetrates the loose ground layer, this rigid tubular body being adapted to be connected to a source of drilling fluid and to means for driving in rotation said tubular body and comprising, in combination, a crown-type drill bit provided with a bore through which said core barrel can slide from said first position to said second position, an obturator means for said core barrel, said obturator means being slidably mounted in said core barrel and being provided at its lower part with ground cutting elements, said obturator means being further connected to said core barrel and maintained substantially at the level of said drill bit in said first position of said core barrel, the lower end of said core barrel being also provided with ground cutting elements and being also located at the level of said drill bit in said first position of said core barrel, said lower end and said obturator means thus cooperating with said core barrel for obturating the bore of the drill bit by the cutting elements, thereby preventing the formation of a core within said bore in said first position which thus defines a position of full bore drilling of the device.
Claim 5
Dependent Claim
47 words
A device according to claim 1, wherein said obturating means is constituted by a plug-shaped drill bit element having a cylindrical shape and comprises means for making said drill bit, said core barrel and said plug-shaped element in the drilling position of the device, fast in rotation.
Claim 6
Dependent Claim
67 words
A device according to claim 2, wherein said means for making fast in rotation includes at least a cotter pin integral with the core barrel, said pin being slidable on the one hand in a longitudinal groove provided in the cylindrical wall of said plug-shaped element and, on the other hand, in a longitudinal groove provided in the cylindrical wall of the bore of said drill bit.
Claim 7
Dependent Claim
51 words
A device according to claim 1, wherein said obturating means is connected to said tubular body through suspension means comprising a suspension rod coaxial with the device, a first end of said rod being integral with said obturating means and the second end being connected to said body through resilient means.
Claim 8
Dependent Claim
64 words
A device according to claim 4, wherein said second end of the suspension rod is integral with an auxiliary piston which is slidable in a cylinder integral with said body and filled with a compressible fluid which exerts a force on said auxiliary piston in contact with a shoulder of said cylinder and a spring is placed between said auxiliary piston and said cylinder.
Claim 9
Dependent Claim
33 words
A device according to claim 4, comprising means for reintroducing said core barrel into said gun tube after removing a core from said core barrel, said means for introducing actuating said suspension rod.
Claim 10
Dependent Claim
158 words
A device according to claim 6, wherein said suspension means comprises an auxiliary piston which is displaceable in a cylinder integral with said tubular body, said cylinder being filled with a fluid under pressure which keeps said auxiliary piston in an upper position, said suspension rod being provided with a shoulder adapted to come into abutment against said auxiliary piston and to displace it against the action of the fluid pressure, said resilient means being constituted by spring means placed between said auxiliary piston and its cylinder, and said means for reintroducing comprises a second locking means bearing against said shoulder of said suspension rod, said locking element maintaining said suspension rod in a position in which said obturating means is at the level of said drill bit, said second locking means being adapted to release said suspension rod when said core barrel has penetrated the ground layers, and handling means for axial displacement of said suspension rod.
Claim 11
Dependent Claim
110 words
A device according to claim 7, wherein said handling means are constituted by a jack integral with said tubular body and whose piston is connected to said suspension rod, said auxiliary piston having a calibrated bore opening out on both of the parallel faces of said auxiliary piston, said calibrated bore establishing a communication between the cylinder in which said auxiliary piston is displaceable and one of the chambers limited by the piston of the handling means, the other of said chambers being connected through a duct to an element for sequentially connecting said other chamber with a source of pressurized fluid or with the external space surrounding the device.
Claim 12
Dependent Claim
103 words
A device according to claim 7, wherein said second locking means is formed by at least one locking jack placed radially relative to the axis of the device and communicating with said chamber through at least one duct, so that, under the action of the pressure of the gas housed in said chamber, the rod of said locking jack is displaced against the antagonistic action of resilient means, toward the device axis and cooperates with said shoulder of said suspension rod to keep said rod in the position in which said obturating means is located substantially at the level of said drill bit.
Claim 13
Dependent Claim
85 words
A device according to claim 1, comprising a gun tube integral with said tubular body and housed therein, ducts provided between the internal wall of said body and the external wall of said gun tube, said ducts opening out in the immediate vicinity of said drill bit, thereby permitting the flow of the flushing fluid from said source of fluid, and a heavy main piston placed above said core barrel and integral therewith, said piston and said core barrel being slidable in said gun tube.
Claim 14
Dependent Claim
86 words
A device according to claim 10, wherein said propulsion means comprises a chamber housing a pressurized fluid and communicating through an orifice with the interior of said gun tube and a controlled member which, in said drilling position of the device, obturates said orifice, thereby preventing the fluid from flowing from said chamber into said gun tube, which would exert on said main pistOn a force releasing said core barrel from said locking means and thereby propulsing it from said first position to said second position.
Claim 15
Dependent Claim
18 words
A device according to claim 11, wherein said chamber is filled with a gas under a determined pressure.
Claim 16
Dependent Claim
12 words
A device according to claim 12, wherein said gas is pressurized air.
Claim 17
Dependent Claim
81 words
A device according to claim 11, wherein said controlled member comprises a differential piston including an obturation piston slidable through said orifice for opening or closing this orifice and a control piston integral with said obturation piston and displaceable in a bore, the fluid in said chamber exerting its pressure on said differential piston for moving it, against the antagonistic action of calibrated return means, toward a position of opening of said orifice when the device is in its drilling position.
Claim 18
Dependent Claim
58 words
A device according to claim 14, wherein said calibrated return means comprises calibrated spring means placed between said differential piston and said chamber, said calibrated spring means displacing said differential piston to its position of closure when the pressure in the fluid has reached, while decreasing, a predetermined value corresponding to the calibration of said calibrated spring means.
Claim 19
Dependent Claim
41 words
A device according to claim 14, comprising means for controlling said controlled member, said means for controlling being adapted to cause the opening of said orifice only when the device is not driven in rotation, by action on said locking means.
Claim 20
Dependent Claim
148 words
A device according to claim 16, wherein said control member comprise means for selecting the operation of the device, said selecting means comprising a recess which communicates, through at least one opening, with said ducts and a ball, displaceable within said recess for obturating said opening when said tubular body is not driven in rotation, and for uncovering said opening under the action of a centrifugal force when the device is in its drilling position and is driven in rotation, said control member further including control jack means connected through a duct to the inlet of the drilling fluid, said jack means having a piston which is displaceable against the antagonistic action of spring means, under the action of an increase in the drilling pressure occurring in the absence of rotation of the device, for actuating a control rod which releases said differential piston from said locking means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |