Core barrel head assembly with an integrated sample orientation tool and system for using same
A core barrel head assembly having at least one electronic instrument that is configured to obtain orientation data; a power source; and a communication means to receive and/or transmit orientation data for use in a core sample down hole surveying and sample orientation system that is configured to provide an indication of the orientation of a core sample relative to a body of material from which the core has been extracted, and also to a method of core sample orientation identification.
1 . A core barrel head assembly comprising:
a proximal end portion comprising a check valve assembly;
a distal end portion; and
a hollow spindle extending between and coupled to each of the proximal end portion and the distal end portion, wherein the hollow spindle has a proximal end, a distal end, and a bore that extends continuously through the hollow spindle from the proximal end to the distal end; and
at least one bearing received within a proximal end of the distal end portion, wherein the at least one bearing is configured to rotatably support the hollow spindle relative to the distal end portion,
wherein the distal end portion comprises an interior wall, wherein the hollow spindle has an exterior surface, wherein the interior wall and the hollow spindle cooperate to at least partly define an interior cavity that is configured to receive at least one electronic instrument therein, and
wherein the bore that extends continuously through the hollow spindle provides fluid communication through the distal end portion of the core barrel head assembly to the check valve assembly.
2 . The core barrel head assembly of claim 1 , wherein the core barrel head assembly comprises an elongate body that includes the distal end portion.
3 . The core barrel head assembly of claim 1 , further comprising a bushing positioned between the distal end portion and the hollow spindle.
4 . The core barrel head assembly of claim 3 , wherein the distal end portion comprises an internal bushing mount, wherein the bushing is mounted to the internal bushing mount of the distal end portion.
5 . The core barrel head assembly of claim 1 , further comprising the at least one electronic instrument within the internal cavity, wherein the at least one electronic instrument is configured to obtain orientation data.
6 . The core barrel head assembly of claim 5 , wherein the at least one electronic instrument is hermetically sealed within the interior cavity.
7 . The core barrel head assembly of claim 1 , further comprising a power source within the interior cavity and operatively coupled to the at least one electronic instrument.
8 . The core barrel head assembly of claim 1 , further comprising a nut threadedly coupled to the hollow spindle, wherein the nut partially defines the interior cavity.
9 . The core barrel head assembly of claim 8 , wherein the nut, the interior wall, and the hollow spindle cooperatively enclose the interior cavity.
10 . The core barrel head assembly of claim 1 , further comprising a spring mounted within the interior cavity.
11 . The core barrel head assembly of claim 1 , wherein the interior cavity at least partly surrounds the hollow spindle.
12 . The core barrel head assembly of claim 1 , further comprising a grease port in fluid communication with the interior cavity.
13 . The core barrel head assembly of claim 1 , wherein the distal end portion comprises a threaded distal end that is configured to couple to a core tube.
14 . The core barrel head assembly of claim 1 , wherein the check valve assembly comprises:
a distally tapered seat;
an interior chamber; and
a check ball received within the interior chamber of the check valve assembly, wherein the check ball is configured to selectively block the distally tapered seat, thereby inhibiting flow through the check valve assembly and into the hollow spindle.
15 . The core barrel head assembly of claim 14 , wherein the check valve assembly defines at least one port that extends from an exterior surface of the check valve assembly to the interior chamber of the check valve assembly.
16 . The core barrel head assembly of claim 14 , wherein the proximal end of the hollow spindle defines the distally tapered seat of the check valve assembly.
17 . The core barrel head assembly of claim 1 , wherein the proximal end of the hollow spindle is threadedly coupled to the check valve assembly.
18 . The core barrel head assembly of claim 1 , wherein the proximal end portion of the core barrel head assembly comprises a wire line retrieval portion.