Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7152674 | Disconnect devices A disconnect device for use as part of a tubing string downhole in an oil or gas well and which comprises a tubular body, at least one slip held within the tubular body, and a sleeve housed within the tubular body to hold the at least one slip in coupling engagement... | 12/26/2006 |
| 7037305 | Heart presentation device and method A medical instrument for positioning an internal organ during surgical and diagnostic procedures is provided. In one embodiment, the medical instrument includes a body having a tissue grasping element and an actuating member effective to move the tissue grasping ele... | 05/02/2006 |
| 6357528 | One-trip casing cutting & removal apparatus A one-trip system for removing casing from a wellhead is described. The string includes a cutting device spaced at the required depth and a grappling device above it at the appropriate location. A swivel tool, such as a marine swivel, is used in conjuncti... | 03/19/2002 |
| 6142545 | Casing pushdown and rotating tool A pushdown and rotating tool for holding, pushing, and rotating a floated casing string into a wellbore is provided. The tool includes a mandrel, a housing attached about the external diameter of the mandrel and shaped to receive a collared casing, a jaws... | 11/07/2000 |
| 5605366 | External pulling tool and method of operation An external pulling tool for retrieving a fish from a wellbore comprises a mandrel fixedly secured to an upper sub, an outer cover fixedly secured to and depending from the upper sub, a collet assembly telescopically surrounding the bottom portion of the ... | 02/25/1997 |
| 4966745 | Fuel rod gripper end cap for minimizing impact with grid cell dimples An end cap is mounted on a fuel rod gripper to cover the end portions of fingers thereon to minimize impacts with grid cell dimples. The fingers are defined by circumferentially-spaced and longitudinally-extending slots in the gripper which permit the fin... | 10/30/1990 |
| 4848820 | Wireline running and pulling tool A wireline tool 10 is capable of permitting either a downwards hammer action for release when its top sub 12 is connected to its housing 30, or an upwards hammer action for release when its top sub is connected to its core 26, and is capable of attachment... | 07/18/1989 |
| 4586740 | Latch assembly A latch assembly for releasably securing an article in the form of a canister within a container housing. The assembly includes a cam pivotally mounted on the housing wall and biased into the housing interior. The cam is urged into a disabled position by ... | 05/06/1986 |
| 4452478 | Nuclear waste storage process and system A system to transport and deposit nuclear wastes for disposal into abandoned or dry oil wells or other wells or deep holes. The system includes a device for connecting to a canister which holds nuclear waste material, for transporting the canister to a we... | 06/05/1984 |
| 4436334 | Releasing overshot apparatus In accordance with an illustrative embodiment of the present invention, a releasing and retrieving apparatus for a pack-off tool used in pipe testing operations includes a tubular body having slots in the walls thereof, each slot having an inclined surfac... | 03/13/1984 |
| 4061389 | Combination wire line releasable overshot and pull tool A wire line oil tool adapted for multiple connectors on the bottom. It can be used as an overshot, a fishing neck grapple or an inside grapple. It incorporates an outer body which is annular about a central member. A catch mechanism locks the outer body u... | 12/06/1977 |
| 4017113 | Electrical cable overshot-grappling tool An overshot-grappling tool adapted to be lowered, raised and manipulated to retrieve sections of electrical cable from a well, wherein a plurality of flexible gripping fingers are provided for gripping a termianl connector of the electrical cable section ... | 04/12/1977 |
| 3950021 | Pulling and running tool In accordance with an illustrative embodiment of the present invention as disclosed herein, a wireline pulling and running tool can be preset at the surface by simple adjustment for functioning as either a pulling or a running tool, and for release from a... | 04/13/1976 |
