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| Number | Title | Issue Date |
| 8146732 | Drive head assembly for a fluid conveyor system The invention disclosed provides a drive head assembly for a fluid conveyor system that propels a fluid entraining conveyor through a well bore to carry fluids to the surface. The invention is comprised of a pair of synchronized follower wheels connected to a set of... | 04/03/2012 |
| 6525137 | Polyamide conveyor elements The invention relates to an improvement to conveyors comprising moving elements which slide over fixed elements such that at least one moving element made of a polyamide-based blend (A) slides over a fixed element made of polyacetal and/or such that at le... | 02/25/2003 |
| 5919358 | Continuous-belt drilling mud separation system A continuous-belt drilling mud separation unit is removably mounted in a box-like housing disposed in the flow path of drilling mud or drilling fluids and is operated by a motor on the housing. The separation unit includes a generally rectangular frame, a... | 07/06/1999 |
| 5423415 | Surface assembly for rope pumps A rope pump for conveying fluid-like material from a reservoir to a select location includes an endless rope, pulleys for forming the endless rope into a loop extending between the reservoir and the select location and an improved drive for driving the en... | 06/13/1995 |
| 5381861 | Drive head for flexible conveyor fluid lifting system An improved drive head for use in transporting materials has a frame for mounting near a tubing orifice, a drive wheel and second wheel rotatably mounted on the frame. Each of the wheels are adaptable to receive a fluid entraining conveyor. The drive head... | 01/17/1995 |
| 5348137 | Vertical tensioning and anti-rotational device for use with single continuous rope conveyor lifting system A vertical tensioning and anti-rotational device for use with a single continuous rope conveyor lifting system, the lifting system having a series of powered pulleys disposed at the top of a well for continuously driving a rope in a closed loop into the w... | 09/20/1994 |
| 5223128 | Apparatus for cleaning a bath of liquid with conveyor belt and adjustable stripper Apparatus for cleaning a bath of liquid, in particular a metal-working machine lubricant and/or coolant, by means of a conveyor belt which is fed around a drive roller, driven by a motor, in a chamber of a housing and dips into the bath of liquid, charact... | 06/29/1993 |
| 5080781 | Down-hole hydrocarbon collector A portable low-viscosity hydrocarbon collector incorporating an endless absorption belt for collecting low-viscosity hydrocarbon liquids from a well and pumping those liquids to the surface. The collector incorporates a plurality of rollers which may be a... | 01/14/1992 |
| 5048670 | Flexible conveyor assembly and conveying apparatus and method for lifting fluid A conveying apparatus for lifting fluid includes a flexible conveyor assembly having a pair of flexible tubes forming respective tubular walls and an endless flexible rope conveyor extending through respective passages defined by the tubular walls. The ro... | 09/17/1991 |
| 5016708 | Apparatus and method for producing and cleaning an oil well An apparatus and method provide for the efficient pumping of fluids from an earth formation penetrated by a wellbore, and simultaneously provide for clean out of channels associated with the producing zone of the formation. In one aspect, an endless belt of tw... | 05/21/1991 |
| 4962847 | Liquid lift A cable pulley transmission has a plurality of pulleys with flight receiving pockets, an endless cable trained about the pulleys, and a plurality of flights located at spaced intervals along the cable. The flights on the cable fit into the flight receivin... | 10/16/1990 |
| 4834880 | Device for picking up oil from water and from the surface of water The invention relates to a device for picking up oil from water and from the surface of water, the device being installed to a water craft and comprising at least one collecting means passing around rolls and being installed obliquely, there being at the ... | 05/30/1989 |
| 4712667 | Device for recovering fluid from a well An endless chain of link members having oil accumulating cavities disposed therein is circulated in a well at a controlled rate carrying oil to the surface where same is dumped and removed by brush and wipers.... | 12/15/1987 |
| 4373625 | Double-walled rotary tubular conveyor with stabilizing drive means A double-walled rotary tubular conveyor includes a stabilizing drive means which prevents the conveyor tube from moving backward, forward or sideways. Two pairs of driven rollers are located in the hollow interior of the conveyor tube. A rubber drive whee... | 02/15/1983 |
| 4174033 | Double walled rotary tubular conveyor A conveying device having a flexible member with inside and outside surfaces and first and second end positions forming inlet and outlet orifices. Support mechanisms disposed intermediate the inside and outside surfaces and a drive mechanism for engaging ... | 11/13/1979 |
| 4034845 | Apparatus for stacking printed products continuously arriving from conveyor means, especially products arriving in an imbricated formation An apparatus for stacking printed products or the like continuously arriving from a conveyor and moving along a conveying path of travel, especially printed products arriving in an imbricated product formation, wherein there are provided a plurality of cl... | 07/12/1977 |
| 3968579 | Apparatus for sediment dredging and ocean mineral gathering An underwater mining or dredging apparatus having a supporting vessel and a continuous loop to which is attached a number of containers. In one embodiment, the loop is hollow and has a ballasted fluid in a lower portion while the descending portion is buo... | 07/13/1976 |
