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| Number | Title | Issue Date |
| 7279521 | Nylon nanocomposites A method for modifying the properties of a nylon block copolymer comprising: supplying a nylon block copolymer wherein the nylon block copolymer has a flexural modulus, a tensile modulus, and an unnotched Izod impact strength. Incorporated into the nylon block copol... | 10/09/2007 |
| 7121336 | Well scrubber A cylindrical brush for scrubbing the inside surface of a pipe is made of bristles attached to a springy helix. The diameter of the brush is greater than the inside diameter of the pipe. When the brush is pushed through the pipe the helix collapses and compacts the ... | 10/17/2006 |
| 7121343 | Selectively operational cleaning tool A downhole cleaning tool (10) for oil and gas wells. Brushes, scraper, wipers (32) and the like are mounted on a sleeve (14) over a tubular body (12), and the members successively moved towards and away from an inner surface of a tubular ... | 10/17/2006 |
| 6883605 | Wellbore cleanout tool and method A wellbore cleanup tool and method are described. In one embodiment, the fluid is displaced with a cup seal into the tubing/drill pipe as the seal is lowered into the wellbore. In another embodiment reverse circulation directs debris into the tubing/drill pipe as it... | 04/26/2005 |
| 6474349 | Ultrasonic cleanout tool and method of use thereof Apparatus for cleaning well bore tubulars comprises an ultrasound source suspended on a work string adapted to be run in the well, wherein the ultrasound source provides sufficient ultrasonic energy to remove scale or other undesirable debris or particles... | 11/05/2002 |
| 6397864 | Nozzle arrangement for well cleaning apparatus An apparatus for cleaning subterranean wellbores is described. The apparatus comprises a rotatable jet head with less than five axially separated nozzles through which an abrasive fluid is discharged. The nozzles are mounted with an axial separation of pr... | 06/04/2002 |
| 5167279 | Well cleaning assembly A well cleaning attachment useful as a part of a collection of tools sent down a well bore on a tubing string includes a tubular mandrel provided with a plurality of longitudinal slots in which corresponding knife carriers are inserted. Each carrier is be... | 12/01/1992 |
| 5161612 | Well casing wash assembly A water pressure cleaning assembly useful in cleaning out the perforations in a well casing includes a mandrel structure defined by an upper cylindrical segment and a lower conical segment. An upper and lower annular seal is movable respectively along the... | 11/10/1992 |
| 5135051 | Perforation cleaning tool In accordance with an illustrative embodiment of the present invention, a well perforation cleaning tool includes a fluidic oscillator that creates pressure changes which induce cyclical stresses in the damaged skins of the perforations and causes the ski... | 08/04/1992 |
| 4892145 | Well casing cleaning assembly A well casing cleaning assembly includes a cylindrical mandrel in which a spiral arrangement of transverse drillings is formed each of the drillings receiving a coiled spring intermediate the bases of exteriorly projecting knife blades. A set of arcuate p... | 01/09/1990 |
| 4671355 | Wash tool for stimulating oil wells A wash tool for stimulating oil wells having brushes and/or blades mounted to retractable tool blocks, whereby the brushes or blades can be introduced in the well out of contact with the well liner, and thereafter extended into contact with the liner.... | 06/09/1987 |
| 4612986 | Well cleaning apparatus and treating method A well cleaning apparatus and method of treating a well includes a generally tubular implement which has a first section with adjustable, radially extending cables, and a second section with cable loops extending outward, a bottom cone-shaped plug and a t... | 09/23/1986 |
| 4609045 | Method and apparatus for cleaning the screen inlet portion of a water well casing A fluid operated cylinder is suspended from a crane by a cable and has a piston rod connected by a cable to a cleaning unit for supporting the cleaning unit within the screened inlet portion of a water well casing extending into the ground. Air is supplie... | 09/02/1986 |
| 4332296 | Well cleaning tool A liner cleaning tooling comprising an elongate vertically extending cylindrical body, coupling means at the upper end of the body to connect with a fluid conducting run-in pipe string, a central longitudinal flow passage in the body communicating with th... | 06/01/1982 |
