Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 7832473 | Method for controlling the flow of fluid between a downhole formation and a base pipe A method is disclosed for controlling the flow of fluid between a downhole formation and a base pipe located in wellbore proximate the downhole formation. A plurality of chokes are established between the formation and the base pipe to regulate the flow of fluid bet... | 11/16/2010 |
| 7699100 | Dropping sub method and apparatus In one embodiment a method and apparatus for an improved loading sub method and apparatus is disclosed. In one embodiment the method and apparatus can be used to pump various pump down means into the well bore from the rig. ... | 04/20/2010 |
| 7673677 | Reusable ball seat having ball support member Apparatuses for restricting fluid flow through a well conduit comprise a housing having a longitudinal bore and a reusable seat disposed within the bore. The seat comprises a slidable element, a fixed element, a plug element support member, a seat inner diameter, an... | 03/09/2010 |
| 7647964 | Degradable ball sealers and methods for use in well treatment Described is an oil-degradable ball sealer for use in the oil and gas industry. The ball seal comprises a particular composition including ethylene and one or more alpha-olefins, prepared by an injection molding technique to provide a ball sealer which will dissolve... | 01/19/2010 |
| 7537052 | Ball dropping tool method and apparatus In one embodiment a method and apparatus for an improved ball dropper is provided. In one embodiment the method and apparatus can be used to drop various objects into the well bore from the rig. In one embodiment, when the well is pressurized the tool can be loaded ... | 05/26/2009 |
| 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 |
| 7322413 | Equalizer valve assembly A method for controlling a fluid pressure applied to a cementing plug comprises disposing the cementing plug within a casing string to define a trapped volume of fluid within the casing string, isolating a portion of the trapped volume of fluid adjacent the cementin... | 01/29/2008 |
| 7322408 | Downhole tool with actuable barrier A downhole tool for use in a cased or lined well bore (40), the tool including a barrier (36) arranged on an outer surface of the tool. The barrier may be of a resilient material so that it can be deformed on actuation to control the passage of fluid b... | 01/29/2008 |
| 7281589 | Ball dropping tool method and apparatus One embodiment includes a method and apparatus for an improved ball dropper. In one embodiment the method and apparatus can be used to drop various objects into the well bore from the rig. In one embodiment, when the well is pressurized the tool can be loaded with o... | 10/16/2007 |
| 7234522 | Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore A float system for use in cementing a casing in a wellbore. The wellbore is drilled with a drill bit attached to the casing. The drill bit is removed after the wellbore is drilled. The float system is lowered into the casing after the drill bit is removed. The float... | 06/26/2007 |
| 7163066 | Gravity valve for a downhole tool A gravity valve for a downhole tool for use in a subterranean well and a method of use thereof. The gravity valve is adapted to control the flow of a dowuhole fluid through the downhole tool. The gravity valve typically includes a plunger and a seat. The plunger may... | 01/16/2007 |
| 7124831 | Resin impregnated continuous fiber plug with non-metallic element system A non-metallic element system is provided which can effectively seal or pack-off an annulus under elevated temperatures. The element system can also resist high differential pressures without sacrificing performance or suffering mechanical degradation, and is consid... | 10/24/2006 |
| 7100700 | Downhole ball dropping apparatus A ball release mechanism is mounted near the intended seat. The ball or balls are kept out of the circulating stream. High circulation rates followed by curtailment of circulation places an outlet port in position to allow the ball or balls to be pushed out by a spr... | 09/05/2006 |
| 6926086 | Method for removing a tool from a well A method of treating a subterranean formation surrounding a wellbore, according to which a tool inserted into the wellbore for performing a function in the wellbore is fabricated of a material that breaks up upon detonation of an explosive mounted on the tool, thus ... | 08/09/2005 |
| 6802372 | Apparatus for releasing a ball into a wellbore The present invention relates to an apparatus for dropping a ball into a wellbore. The apparatus is particularly useful for dropping a ball that has a diameter that is larger than the diameter of a bore within a wellbore tool above the apparatus. The ball-releasing ... | 10/12/2004 |
| 6571880 | Method and multi-purpose apparatus for control of fluid in wellbore casing A downhole apparatus is described as having an upper mandrel shearably connected to a lower mandrel by a first set of shear pins. Each of the mandrels has an elastomeric cement plug formed around the mandrels. A sleeve is shearably connected within the lo... | 06/03/2003 |
| 6491103 | System for running tubular members The present invention relates to a wiper plug and internal drop ball mechanism that may be used in conjunction with a downhole surge reduction tool to run, hang, and cement casing liners in a wellbore. The apparatus of the present invention comprises a wi... | 12/10/2002 |
| 6394180 | Frac plug with caged ball A downhole tool for sealing a wellbore. The downhole tool includes a packer with a ball seat defined therein. A sealing ball is carried with the packer into the well. The movement of the sealing ball away from the ball seat is limited by a ball cage which... | 05/28/2002 |
| 6311771 | Plug for use in wellbore operations and apparatus for launching said plug An apparatus for launching at least two plugs, said apparatus comprising a mandrel (2), a lower plug (22) and an upper plug (21) releasably disposed with respect to said mandrel (2), wherein said upper plug (21) comprises a body (23) having a flow path (2... | 11/06/2001 |
| 6220360 | Downhole ball drop tool A ball drop tool, for dropping a ball to a ball seat located in a tool, or tool string therebelow. The ball drop tool has an upper end adapted to be connected to the lower end of the coiled tubing string. The ball drop tool includes a housing with a ball ... | 04/24/2001 |
| 6059032 | Method and apparatus for treating long formation intervals A method and apparatus for treating a long interval within a wellbore wherein a treatment fluid is delivered to selected levels within the interval by blocking flow to certain zones while allowing flow to others. A treatment tube extends substantially thr... | 05/09/2000 |
| 5950724 | Lifting top drive cement head A subsea lifting top drive cement head in which cement flows from the top. The cement head includes lower and upper assemblies with a bore for fluid flow, and a body in sure lock connection with the lower and upper assemblies and having a dart cage to pre... | 09/14/1999 |
| 5485882 | Low-density ball sealer for use as a diverting agent in hostile environment wells The invention is a rigid, hollow core, low-density ball sealer designed to perform effectively in hostile well environments. It temporarily seals perforations inside cased wells at temperatures up to 400° F. (204° C.), at hydrostatic pressures up to 20,... | 01/23/1996 |
| 5462121 | Failsafe liner installation assembly and method An apparatus and method for installation of oil field tubulars, such as liners, is disclosed. The invention allows positioning of a liner with assurances that rotational forces or pressure applied within or outside the work string will not actuate the pac... | 10/31/1995 |
| 5360069 | Failsafe liner installation assembly and method An apparatus and method for installation of oil field tubulars, such as liners, is disclosed. The invention allows positioning of a liner with assurances that rotational forces or pressure applied within or outside the work string will actuate the packer ... | 11/01/1994 |
| 5253709 | Method and apparatus for sealing pipe perforations Ball sealers for flowing into casing perforation holes in a wellbore to selectively seal off those perforations receiving a disproportionately large amount of well treatment fluid being injected through the perforations. The ball sealers (22) are comprise... | 10/19/1993 |
| 5127472 | Indicating ball catcher An indicating ball catcher for use in a downhole drill pipe or tool string. The ball catcher comprises an upper body portion having an inlet opening smaller than any ball pumped thereto and a lower body portion. An elongated case interconnects the upper a... | 07/07/1992 |
| 4881599 | Mechanical system for diversion in the acidizing treatment of oil formations The invention concerns a mechanical system which permits the use of ball sealers as diversion agents in the acidizing of productive hydrocarbon formations, by associating the advantages of mechanical diversion to the advantages of the use of ball sealers,... | 11/21/1989 |
| 4711300 | Downhole cementing tool assembly A cementing tool assembly comprises a float collar, a cementing plug, and a wiper plug having interconnecting locking ends. The cementing tool assembly is non rotatable in the casing and includes internal frangible cutters which are breakable in compressi... | 12/08/1987 |
| 4510994 | Pump out sub A pump out sub for use in a well tubing for receiving a plug for sealing the tubing and applying pressure to the tubing for actuating a well device and thereafter applying a higher pressure to pump out the plug and open the bore. A circular ring is connec... | 04/16/1985 |
| 4505334 | Ball sealer A ball sealer for use in flow equalization during fluid injection into oil wells is described which has a layer of thermosetting filament wrapped around its core. After curing, the wrapping layer provides the major part of the ball's strength.... | 03/19/1985 |
| 4491177 | Ball dropping assembly A ball dropping assembly is shown of the type which is connected in a string of pipe for dropping a ball in the pipe string. A main body is mounted on the pipe. The main body has an interior bore which communicates with the interior of the pipe. A cam hou... | 01/01/1985 |
| 4407368 | Polyurethane ball sealers for well treatment fluid diversion Ball sealers comprising a solid core coated with a polyurethane elastomer are introduced into a well to seal well perforations and divert fluid therein. In the preferred embodiment the ball sealers are used in a hydrocarbon liquid treating fluid and have ... | 10/04/1983 |
| 4244425 | Low density ball sealers for use in well treatment fluid diversions A ball sealer for use as a diverting agent when treating a well having a perforated casing. The ball sealer is sized to plug a perforation and has a density less than the treating fluid. The ball sealer comprises a material, such as syntactic foam or poly... | 01/13/1981 |
| 4194566 | Method of increasing the permeability of subterranean reservoirs A method of acidizing and/or fracturing a subterranean reservoir with a minimum of damage to the reservoir by the displacement fluid used to displace the acidizing or fracturing fluid into the reservoir and by the fluid used to kill the well wherein a res... | 03/25/1980 |
| 4190112 | Pump down wipe plug and cementing/drilling process An improved pump down wipe plug has at least one tooth protruding from its bottom surface capable of engaging, denting and penetrating the surface on which the plug comes in contact within the well. An improved process of cementing and drilling through a ... | 02/26/1980 |
| 4190111 | Well cementing/plug drilling apparatus and improved cementing and drilling process A cementing/plug drilling apparatus consists of a flat plate slightly less in maximum diameter than the pipe in which it will pass having at least one protrusion or tooth on both faces, the tooth being strong enough and sharp enough to engage, dent and pe... | 02/26/1980 |
| 4175619 | Well collar or shoe and cementing/drilling process An improved well shoe or collar has at least one tooth protruding from the top of the cement shoulder of the shoe or collar capable of engaging, denting and penetrating a pump down wipe plug and retarding the tendency of the plug to rotate when engaged by... | 11/27/1979 |
| 4161216 | Mechanical latch with hydraulic locking mechanism An apparatus is provided for selective mechanically activated latching and fluid activated locking and unlocking of a tubular string within an anchor assembly in a subterranean bore, wherein the anchor assembly has defined thereon co-engaging elements for... | 07/17/1979 |
| 4058163 | Selectively actuated vibrating apparatus connected with well bore member A vibrating apparatus connected with a member insertable into a well bore including an insertable and retrievable member enabling the vibrating apparatus to be selectively actuated. The vibrating apparatus includes a rotatable, eccentric weight forming a ... | 11/15/1977 |
