A crimping connection for an inner tube is disclosed. An inner barrel system includes a first coring inner barrel; a second coring inner barrel; and a crimp ring overlapping an end of the first coring inner barrel and an end of the second coring inner barrel and compressed to mechanically couple the first coring inner barrel with the second coring inner barrel.

Core sample catchers for use with coring tools for obtaining core samples from subterranean formations may include at least one flap catcher member configured to be movably coupled to an inner barrel of the coring tool and configured to move between an open position and a closed position. A piston member including a central bore may be disposed in a passageway extending through the inner barrel. The piston member may be configured to move between a first position and a second position, the piston member configured to retain the at least one flap catcher member in the open position when the piston member is in the first position, and allow flap catcher member to move into the closed position when the piston member is in the second position.

Core sample catchers for use with coring tools for obtaining core samples from subterranean formations may include at least one flap catcher member configured to be movably coupled to an inner barrel of the coring tool and configured to move between an open position and a closed position. A piston member including a central bore may be disposed in a passageway extending through the inner barrel. The piston member may be configured to move between a first position and a second position, the piston member configured to retain the at least one flap catcher member in the open position when the piston member is in the first position, and allow flap catcher member to move into the closed position when the piston member is in the second position.

A core sample catcher for a coring tool includes at least one flap catcher member movably coupled to an inner barrel of the coring tool. The at least one flap catcher member is configured to move between a first position and a second position. A passageway extending through the inner barrel is at least substantially un-occluded by the at least one flap catcher member in the first position and at least partially occluded by the at least one flap catcher member in the second position. The core sample catcher also includes a piston member located and configured to retain the at least one flap catcher member in the first position. The piston member is sized and configured to release the at least one flap catcher member as the piston is forced upward within the inner barrel by the core sample. Components are provided and assembled to form core sample catchers.

A core sample catcher for a coring tool includes at least one flap catcher member movably coupled to an inner barrel of the coring tool. The at least one flap catcher member is configured to move between a first position and a second position. A passageway extending through the inner barrel is at least substantially un-occluded by the at least one flap catcher member in the first position and at least partially occluded by the at least one flap catcher member in the second position. The core sample catcher also includes a piston member located and configured to retain the at least one flap catcher member in the first position. The piston member is sized and configured to release the at least one flap catcher member as the piston is forced upward within the inner barrel by the core sample. Components are provided and assembled to form core sample catchers.

A tool retrieves material from a well. The tool has a cylindrical tool body, malleable members, and a cylindrical jacket. The tool body defines a chamber adapted to receive material for retrieval. The malleable members are on the lower end of the tool body and preferably are made of a relatively hard, tough malleable material such as steel. They are bendable from an open position allowing material to enter the chamber to a closed position capturing the material. The jacket is mounted on the exterior of the tool body and has a mill surface which is adapted to bend the malleable members from the open position to the closed position. Relative axial movement of the jacket and the tool body causes the malleable members to bear on the mill surface and bend to the closed position.

A tool retrieves material from a well. The tool has a cylindrical tool body, malleable members, and a cylindrical jacket. The tool body defines a chamber adapted to receive material for retrieval. The malleable members are on the lower end of the tool body and preferably are made of a relatively hard, tough malleable material such as steel. They are bendable from an open position allowing material to enter the chamber to a closed position capturing the material. The jacket is mounted on the exterior of the tool body and has a mill surface which is adapted to bend the malleable members from the open position to the closed position. Relative axial movement of the jacket and the tool body causes the malleable members to bear on the mill surface and bend to the closed position.

A core sampling tool having a core barrel and a core barrel head assembly coupled to a proximal end of the core barrel. The core barrel head assembly does not include a grease port or a grease fitting. The core barrel head assembly has a spindle and at least one bearing that rotationally engages the spindle. Each of the bearings is a self-lubricating bearing, such as, for example, a solid oil bearing.