Coring tool
First Claim
Patent Images
1. A full closure valve and core retention assembly for connection with a coring tool having an inner barrel, comprising:
- a mandrel connectable to the inner barrel of the coring tool at its upper end and connectable at its lower end to a core catcher housing, said mandrel defining a body about its intermediate portion for housing a ball closure valve, said mandrel being provided with a longitudinal bore disposed therethrough;
said ball closure valve comprising a substantially spherical ball through which is disposed a bore, said ball defining opposed flattened portions which include pivot means about which said ball pivots in said housing between an open and a closed position, said open position aligning the bore through said ball with the bore of said mandrel, said closed position moving said bore to a position normal to the axis defined by the mandrel bore;
a sleeve slidably secured on said mandrel and moveable between a first and a second position, said sleeve being operably coupled to said ball such that said sleeve and ball are cooperatively moveable between said open and closed positions, said sleeve being normally biased in said closed position;
means for locking said sleeve and said ball in said open position;
piston means responsive to fluid pressure to unlock said sleeve from said open position so as to enable said ball to move to said closed position thereby severing the core and closing said inner barrel.
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Accused Products
Abstract
A coring assembly comprising a body securable at its upper end to a mandrel add at its lower end to a core catcher housing, a ball sleeve slidably disposed about said mandrel and moveable between a first and a second position, a ball closure valve disposed in said body and moveable with said mandrel between the first and second position, the combination operable to remotely cut and collect a loosely consolidated core sample.
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Citations
27 Claims
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1. A full closure valve and core retention assembly for connection with a coring tool having an inner barrel, comprising:
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a mandrel connectable to the inner barrel of the coring tool at its upper end and connectable at its lower end to a core catcher housing, said mandrel defining a body about its intermediate portion for housing a ball closure valve, said mandrel being provided with a longitudinal bore disposed therethrough; said ball closure valve comprising a substantially spherical ball through which is disposed a bore, said ball defining opposed flattened portions which include pivot means about which said ball pivots in said housing between an open and a closed position, said open position aligning the bore through said ball with the bore of said mandrel, said closed position moving said bore to a position normal to the axis defined by the mandrel bore; a sleeve slidably secured on said mandrel and moveable between a first and a second position, said sleeve being operably coupled to said ball such that said sleeve and ball are cooperatively moveable between said open and closed positions, said sleeve being normally biased in said closed position; means for locking said sleeve and said ball in said open position; piston means responsive to fluid pressure to unlock said sleeve from said open position so as to enable said ball to move to said closed position thereby severing the core and closing said inner barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A closure valve assembly for connection within a coring tool having an inner barrel, comprising:
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a mandrel connectable to said inner barrel at its upper end and its lower end defining a housing for a ball closure valve, said mandrel also defining a fluid bore longitudinally disposed therethrough, said housing being defined by a second bore formed through said mandrel normal to the axis defined by said fluid bore, said housing being bounded by an upper and a lower support means; an actuator sleeve circumferentially disposed on and in slidable relation to said mandrel, said sleeve moveable between a first and a normally biased second position, the lowermost portion of said actuator sleeve partially extending over said housing and being operably coupled to a closure valve; a closure valve rotatably disposed about a pivot axis, said valve including a bore disposed therethrough where the plane described by the rotation of the axis of said valve is parallel to the axis of said fluid bore, said valve defining a generally spherical shape with two flattened portions oppositely disposed about said pivot axis, said flattened portions also accommodating a key cooperative with a keyway formed in said actuator sleeve, said key being eccentrically disposed with respect to said pivot axis; said closure valve moveable between a first and a second position coincident with the first and second position of said actuator sleeve such that the bore of said valve when in a first position is substantially coaxial with the axis of said fluid bore, the axis of the bore of said valve when in a second position being situated substantially normal to the axis of said fluid bore; and means for locking said actuator sleeve in a first position. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A full closure core catcher for use within a coring tool having an inner tube and a longitudinal axis, comprising:
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a tubular body securable to said inner tube at its upper end and having an inner bore disposed therethrough, said body defining a housing about its intermediate portion receivable to a ball closure value; an actuator sleeve slidably disposed on said body between an upper and a lower position, said sleeve operably engaged to said ball closure valve and being normally biased in said upper position; a ball valve rotatably disposed in said housing between an open and a closed position, said ball having a bore disposed therethrough where the open position of said ball corresponds to said lower position of said sleeve; means for locking said actuator sleeve in said lower position; fluid actuated means to release said lock means so as to enable said actuator sleeve to move to said upper position, thereby moving said ball valve to a closed position. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification