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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 7350578 | Diverter plugs for use in well bores and associated methods of use Zonal isolation of well bores is often desirable for performing downhole operations such as stimulation operations. In certain embodiments, diverter plugs for achieving zonal isolation in a casing string in a well bore may comprise a mandrel having a first end and a... | 04/01/2008 |
| 7347273 | Bottom hold completion system for an intermittent plunger A bottom hole assembly for an intermittent lift plunger system includes a retrievable downhole anchor which may be set and reset in one downhole trip, a retrievable packing device, and a plunger stop. ... | 03/25/2008 |
| 7328749 | Method and apparatus for accumulating liquid and initiating upward movement when pumping a well with a sealed fluid displacement device Liquid is accumulated above fluid displacement device which is moveable and sealed within a production chamber defined by a production tubing, and upward movement of the fluid displacement device is initiated to pump liquid and gas from a well, by different magnitud... | 02/12/2008 |
| 7273098 | Method for controlling oil and gas well production from multiple wells A method for producing oil or gas from multiple wells, the wells including at least a first well and a second well, with each well using an artificial lift system that includes a plunger associated with a motor valve off time, and first and second identical connecti... | 09/25/2007 |
| 7188670 | Plunger lift system An intermittent lift plunger includes at least one seal mandrel, a bottom sub and an upper valve assembly. The valve assembly is closed by a well bottom stop which inserts into the lift plunger and opened by a lubricator stop at the top of the well. The seal mandrel... | 03/13/2007 |
| 7185848 | Mass transfer system for stabilizing an airship and other vehicles subject to pitch and roll moments The invention relates to a mechanism to control the pitch and/or roll and/or center of gravity of a vehicle. The first embodiment is a track-based mass transfer system in which pathways are positioned along or radially terminate at a central horizontal plane of the ... | 03/06/2007 |
| 7080690 | Method and apparatus using traction seal fluid displacement device for pumping wells Liquid is lifted from a well by a traction seal fluid displacement device which is moveably positioned within the production tubing, and which maintains a seal during movement. The traction seal device comprises a resilient flexible toroid shaped structure within ou... | 07/25/2006 |
| 7080691 | Plunger lift tool and method of using the same A plunger lift tool and method of using the same in a well having tubing comprising a tubular housing, having a top portion, a bottom portion, and said housing further defines a passageway therein; a positioning means attached to said housing for removably installin... | 07/25/2006 |
| 6591737 | Pad plunger assembly with interfitting keys and key ways on mandrel and pads A pad plunger assembly includes an elongated mandrel having a pair of opposite ends, at least one pad subassembly disposed about the mandrel and extending between the opposite ends thereof, a plurality of annular key ways and annular keys respectively def... | 07/15/2003 |
| 6554580 | Plunger for well casings and other tubulars A plunger for well casings and other tubulars comprising: An elongate body having a flow passage with a lower inlet port and an upper outlet port; an internal valve positioned between the ports; at least one first flexible sealing member positioned around... | 04/29/2003 |
| 6045335 | Differential pressure operated free piston for lifting well fluids A differential pressure operated free piston for lifting well fluids from a subterranean reservoir to the surface through a well conduit. The free piston includes a piston body adapted for up and down sliding disposition within the conduit and a sealing a... | 04/04/2000 |
| 5427504 | Gas operated plunger for lifting well fluids A gas operated plunger for lifting well fluids from a subterranean reservoir to the surface through a well conduit comprising: a plunger body slidably mountable within the conduit having an upper portion, a lower portion and an intermediate cylindrical po... | 06/27/1995 |
| 5253713 | Gas and oil well interface tool and intelligent controller An interface tool freely slidable within a production pipe or conduit of an oil or gas well capable of creating a positive seal in order to lift liquids and particulates above the device to the surface where they are collected. An internal bypass valve pe... | 10/19/1993 |
| 4531891 | Fluid bypass control for producing well plunger assembly The mandrel of a fluid lift plunger carries pads retracted from a tube string by the continuous bias of collapsing springs. A control rod is displaceable relative to the mandrel causing a change in the force of detent springs which exert a continuous radi... | 07/30/1985 |
| 4363606 | Free piston pump for pumping liquids from a well A free piston pump for use in a well for permitting gas to lift fluid to the well surface. The piston pump includes a body which supports a plurality of vertically and horizontally spaced piston segments which are sealingly engaged to form a piston. The s... | 12/14/1982 |
