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Class 166/311 - Cleaning or unloading well


Subclass of Class 166 - Wells
Definition: A process comprising (1) removing undesired deposited material
No. of patents: 350
Last issue date: 03/06/2012


1                  
NumberTitleIssue Date
8127851Mill and method for drilling composite bridge plugs
A system used to remove multiple isolation plugs from a wellbore. The system is efficient in fluidizing and circulating proppant located below an upper plug resting on top of proppant settled above a lower plug. The system uses a central port of the mill that is in ...
03/06/2012
8122962Apparatus and method for deliquifying a well
The invention is directed to an apparatus, system and method for deliquifying a well. A body having gas supply passages is lowered into a well bore on the end of a string of supply tubing. A string of return tubing is lowered through the supply tubing and is inserte...
02/28/2012
8113285Agitated wellbore cleaning tool and method
A wellbore cleaning assembly is run into a wellbore to be cleaned on a work string. The cleaning assembly comprises a number of cleaning elements for cleaning a wall of the wellbore; and an oscillator coupled to the at least one cleaning element by a force transmiss...
02/14/2012
8091644Microemulsion or in-situ microemulsion for releasing stuck pipe
Nanoemulsion, macroemulsions, miniemulsions, microemulsion systems with excess oil or water or both (Winsor I, II or III phase behavior) or single phase microemulsions (Winsor IV) improve the removal of filter cakes formed during hydrocarbon reservoir wellbore drill...
01/10/2012
8082996Equipment for excavation of deep boreholes in geological formation and the manner of energy and material transport in the boreholes
Utilization of geothermal energy in depths above 5 km could contribute considerably to resolving the global problems related to a lack of energy and to glasshouse gases from fossil fuels. The invention describes innovative equipment which makes deep holes in geologi...
12/27/2011
8002037Downhole cleaning tool and method of use
A downhole cleaning tool comprising: a substantially cylindrical body; at least one cleaning member extending from the cylindrical body and being movable between a retracted position and an active position in which the cleaning member is positioned to clean an inter...
08/23/2011
7950462Scale inhibitors compatible with sandstone acidizing
Methods are given for making scale inhibitors, that were previously incompatible with fluids containing fluoride ion, compatible with fluids containing fluoride ion. Examples of such scale inhibitors include phosphonates and phosphino-polycarboxylates. The method is...
05/31/2011
7913763Washing a cylindrical cavity
A tool (2) for washing a wellbore or hollow tubular has a longitudinal axis and comprises one or more elongate nozzles (7) for ejecting fluid generally radially from the tool. The or each nozzle extends circumferentially around the tool so as to provid...
03/29/2011
7905291Borehole cleaning using downhole pumps
An apparatus for borehole cleaning comprises a tubular conveyance extending from the surface into a borehole to a region to be cleaned, a motor mounted at the end of the tubular conveyance that in use is introduced into the borehole, a pump connected to the motor an...
03/15/2011
7874366Providing a cleaning tool having a coiled tubing and an electrical pump assembly for cleaning a well
To perform a cleanout operation in a wellbore, a cleaning tool having a coiled tubing and an electrical pump assembly is run into the wellbore. The electrical pump assembly that is located in the wellbore is activated. In response to fluid flow generated by the elec...
01/25/2011
7857058Downhole swivel joint assembly and method of using said swivel joint assembly
A downhole swivel joint assembly comprising an upper component and a lower component. The components may assume either of two stable positions relative to each other, namely an unactivated configuration in which the components are rotationally fast with each other b...
12/28/2010
7854263Surfactant package for well treatment and method for using same
A surfactant blend for servicing wells includes a first non-ionic surfactant having a hydrophilic-lipophilic balance of between about 10 and about 15; a second non-ionic surfactant having a hydrophilic-lipophilic balance of between about 2 and about 6; and an anioni...
12/21/2010
7836955Wireline bailing system for removing large volumes of liquid from a borehole
An electrical wireline conveyed baling system for removing large volumes of liquids from a well borehole with a single trip of a bailer tool string. The system also utilizes one or more blow out preventers thereby allowing wireline bailing operations to be carried o...
11/23/2010
7770648Completion method for well cleanup and zone isolation
A completion method isolates a lower zone while circulation at high rates takes place above to clean debris out of the wellbore. Pressure fluctuation sensitive equipment in a lower completion is isolated with a tubing valve during circulation. This further prevents ...
08/10/2010
7753124Autonomous magnetic sleeve for a riser
An autonomous magnetic sleeve for a riser is provided. The sleeve is constructed and arranged to be independently lowered and seated above a subsea tree section. The autonomous magnetic sleeve includes a cylindrical structure having an inner diameter larger than a d...
07/13/2010
7740073Wellhead seal unit
A wellhead seal unit for sealing a subsea oil and/or gas well at the wellhead. The unit comprises a sleeve, sealingly engaged to the workstring and to which, blow out preventer rams can engage. The unit allows the workstring to be rotated and reciprocated within the...
06/22/2010
7690431Methods for controlling migration of particulates in a subterranean formation
Methods comprising: providing a subterranean formation penetrated by a well bore wherein the well bore comprises perforated casing that comprises a plurality of perforations, providing an acidic treatment fluid comprising an aqueous base fluid and an acid compositio...
04/06/2010
7673688Casing wiping dart with filtering layer
A dart may include a foam body, a filtering material at least partially covering the foam body, and a mandrel. The foam body may surround the mandrel. ...
03/09/2010
7624806Pipe cleaning tool and method
A method of cleaning a pipe provides a tool within the pipe. The tool has a body of smaller diameter than the pipe such that the body and pipe define an annulus and a fluid guiding member located at the annulus and movable relative to the pipe. The fluid guiding mem...
12/01/2009
7559374Dual function cleaning tool
A cleaning tool and method of cleaning a liner top in a well bore. The tool includes cleaning elements, typically scrapers, which are arranged eccentrically to an axial bore through the tool. The elements are biased outwardly to contact an inner surface of a polishe...
07/14/2009
7546878Chemical deployment canisters for downhole use
An apparatus for deployment of a reagent downhole includes a housing configured to move in a borehole; a chamber for storing the reagent, wherein the chamber is disposed in the housing and has one or more outlets for dispensing the reagent; a piston configured to mo...
06/16/2009
7533726Method of increasing gas well production
A method of increasing the production of a formation gas from a well bore penetrating a gas producing formation wherein the formation gas has a water content that results in the formation of condensate water from the formation gas as the formation gas passes up the ...
05/19/2009
7527103Procedures and compositions for reservoir protection
A flow conduit having at least one orifice is placed in the vicinity of a flow source, which in one non-limiting embodiment may be a hydrocarbon reservoir. The flow pathway between the orifice and the source is temporarily blocked with a degradable barrier. Once the...
05/05/2009
7409995Apparatus and method for washing tubular conduits during trip out of a conduit string from within a subterranean well
An apparatus for washing undesirable matter off of the exterior of tubular conduits forming a conduit string during trip out of the conduit string within a subterranean well. The tubular conduits may be drill or workover pipe, or the like. A cylindrical housing has ...
08/12/2008
7395865Gas lift plunger arrangement
A plunger in a plunger lift system in an oil and gas well includes shaped grooves spaced along the plunger body, angled fins or below the grooves, an elongated interior cavity open at the bottom, and passages connecting the interior cavity to the grooves. The shape,...
07/08/2008
7380597Deployment of underground sensors
A method of installing a sensor located in a chamber on the out-side of a casing, comprising the steps of positioning the casing in a well, cementing the casing in position, positioning a drilling tool inside the casing level with the chamber, drilling through the c...
06/03/2008
7377283Coiled tubing wellbore cleanout
A method and apparatus for substantially cleaning fill from a borehole is described variously including running a coiled tubing assembly into the wellbore, creating a fluid vortex by circulating cleaning fluid through the coiled tubing, and pulling the coiled tubing...
05/27/2008
7371289Cleaning and doping of tubulars
Apparatus for cleaning and doping a pin 2 of a tubular 3 during the making or breaking of a string on a well platform. The apparatus comprises a housing 4 having first and second conosed ends 6,7 and arranged in used to be secured at its ...
05/13/2008
7353873Magnetic assemblies for deposit prevention and methods of use
An apparatus and method for controlling and/or minimizing the formation or accumulation of unwanted deposits on the inside of fluid flow paths by employing at various locations along the path an assembly of permanent magnets oriented such that the fluid flow is pref...
04/08/2008
7350572Methods for controlling fluid loss
A method of treatment of subterranean formations in which leakoff through natural fractures is controlled through the use of fibers. The method involves pumping a mixture of a formation treatment fluid and a fiber into the formation for matrix stimulation, fracture ...
04/01/2008
7350590Instrumentation for a downhole deployment valve
The present generally relates to apparatus and methods for instrumentation associated with a downhole deployment valve or a separate instrumentation sub. In one aspect, a DDV in a casing string is closed in order to isolate an upper section of a wellbore from a lowe...
04/01/2008
7350597Drilling system and method
A drilling system for drilling a bore hole into an earth formation, the bore hole having an inside wall. A drill string reaches into the bore hole from a surface, leaving a drilling fluid return passage between the drill string and the bore hole inside wall. A botto...
04/01/2008
7347259Downhole oilfield erosion protection by using diamond
A device for use with components for a downhole tool—such as a throat, a nozzle, or a diffuser—used for cleaning a wellbore, are disclosed which decreases the erosion of the components. The device may be comprised of a hardened material, such as stack of pure di...
03/25/2008
7347274Annular barrier tool
The present invention provides for an annular barrier tool to block or restrict the flow of well fluids in the annular region of a well. ...
03/25/2008
7347261Magnetic locator systems and methods of use at a well site
Magnetic locator systems and methods of using same at a wellhead are described. The magnetic locator systems include a magnetic field generator on an oilfield tool component, such as a deployment bar, adapted to be moved through an oilfield pressure control componen...
03/25/2008
7341980Viscoelastic surfactant rheology modification
A method for shortening the shear recovery time of zwitterionic viscoelastic surfactant fluids by adding a rheology enhancer having the structure: R-(EO)x(PO)y—R′—OH in which R is an alkyl group that is straight chaine...
03/11/2008
7337845Well maintenance equipment and procedure
The present invention relates to a method of removing deposits from various types of wells (17) including environmental recovery, water supply, horizontal, barrier, injection, recharge, and/or disposal wells (17). The method includes equipping a well (...
03/04/2008
7331388Horizontal single trip system with rotating jetting tool
A method for completing a well in a single trip is described, which includes inserting a completion tool assembly into the wellbore. The completion tool assembly includes a gravel packing assembly having a central channel substantially therethrough and a service too...
02/19/2008
7322418Continuous circulation drilling method
A method for drilling wells in which the tubular can be added or removed from the drill string whilst mud and drilling fluids being circulated continuously and kept separated from the environment to reduce pollution. A connector is used with an inlet and outlet for ...
01/29/2008
7322419Circulating sub and method
A control sub for use with a hydraulically operated downhole tool. In an embodiment, the sub comprises an outer sleeve connected to a work string and an inner sleeve slidably engaged to the outer sleeve by matching hex profiles, connected to the downhole tool. Radia...
01/29/2008
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