Patent ID: 8668029
Filing Date: 2014-03-11
Classification: E21B

Abstract:
1. A core barrel head assembly configured to engage with an outer casing, the core barrel head assembly having a longitudinal axis, comprising: a body having an inner surface and a connector portion, the inner surface of the body defining a central channel and a receiving opening in communication with the central channel; a spearhead having an elongate shaft, at least a portion of the elongate shaft of the spearhead being positioned within the central channel of the body, the spearhead being operatively associated with the body and configured to translate axially relative to the body; a spring operatively associated with the spearhead, the spring being positioned within the central channel of the body such that at least a portion of the elongate shaft of the spearhead is positioned within the spring, wherein the spring axially biases the spearhead toward the connector portion of the body along the longitudinal axis of the core barrel head assembly to oppose axial movement of the spearhead away from the connector portion of the body along the longitudinal axis; and at least two latches operatively associated with the spearhead and the body and being positioned proximate the receiving opening of the body, the at least two latches being configured to translate between an extended position and a retracted position relative to the body in response to axial translation of the spearhead relative to the body, wherein the at least two latches prevent the core barrel head assembly from moving axially upward and axially downward relative to the outer casing when in the extended position.