| Patent Number |
Title Of Patent |
Date Issued |
| RE39292 |
Apparatus and method for downhole fluid phase separation |
September 19, 2006 |
| Method and apparatus for separating fluids flowing through a downhole well passageway including separating fluids pumped downhole, centrifugal separation, gradually increasing centrifugal acceleration, the establishment of annular flow, gradually establishing annular flow, a receivin |
| 7410003 |
Dual purpose blow out preventer |
August 12, 2008 |
| An improved dual purpose blow out preventer ("BOP") that provides both deployment and wellhead pressure containment functions. The dual purpose BOP may include four sets of rams including a set of seal/slip rams that provide bi-directional sealing being a first barrier to downhole pr |
| 7398824 |
Method for inhibiting or controlling inorganic scale formations with copolymers of acrylamide an |
July 15, 2008 |
| A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. Suitable copolymers include those comprising an acrylamide unit and a quaternary ammonium salt group, and optionally an acrylate and/or nitrogen h |
| 7395863 |
Method of treating a subterranean formation with an oil-based composition containing a polysacch |
July 8, 2008 |
| A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The water-superabsorbent material is capable of absorbing, at a minimum, its own weight. Particula |
| 7395862 |
Combination jar and disconnect tool |
July 8, 2008 |
| A combination jarring tool and disconnect device is disclosed in which the jarring events may be followed by separate disconnect event, or in which the jarring events may coincide with disconnect events. The tool generally comprises a housing and a sleeve in concentric arrangement and |
| 7392845 |
Method of treating oil or gas well with biodegradable emulsion |
July 1, 2008 |
| A biodegradable water-in-synthetic oil base emulsion, effective in the removal of filter cakes, consists of an external phase of a surfactant emulsified in a paraffinic base oil. The emulsion is particularly effective in breaking-down the interfacial rheological properties of oil bas |
| 7392844 |
Method of treating an oil or gas well with biodegradable low toxicity fluid system |
July 1, 2008 |
| A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a fatty acid ester, such as methyl soyate. The fluid system may further contain a lactic acid ester, such as ethyl lactate, and/or a nonionic surfactant. The fluid system may be |
| 7383884 |
Cross-over tool |
June 10, 2008 |
| A well system comprising an improved cross-over tool is provided. The tool may comprise a debris shield for substantially preventing sand, proppant or other well debris from fouling a flow port closing sleeve located below the cross-over tool fracture ports; a return port cover adapted t |
| 7377283 |
Coiled tubing wellbore cleanout |
May 27, 2008 |
| 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 and coiled tubing |
| 7347265 |
Method of forming temporary blocking gel containing guar derivative |
March 25, 2008 |
| A high temperature blocking gel contains a blend of an aqueous fluid and carboxymethyl guar and a crosslinking agent. The gel exhibits excellent hydration capability in brines and positive viscosity generation and controls fluid loss from an oil well during drilling, completion and/or |
| 7347259 |
Downhole oilfield erosion protection by using diamond |
March 25, 2008 |
| 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 diamond disks brazed to fo |
| 7331388 |
Horizontal single trip system with rotating jetting tool |
February 19, 2008 |
| 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 tool assembly slidabl |
| 7326670 |
Well service fluid and method of making and using the same |
February 5, 2008 |
| A well service fluid comprising one or more anionic viscoelastic surfactants and one or more polymers is described. The fluids can contain an aqueous or non-aqueous fluid and/or a buffer for adjusting the pH of the fracturing fluid. The well service fluid can be used as a fracturing |
| 7322411 |
Method of stimulating oil and gas wells using deformable proppants |
January 29, 2008 |
| A method of fracturing using deformable proppants minimizes proppant pack damage, without compromising the fracturing fluid's proppant transport properties during pumping, by use of deformable proppants. Selection of proppant is dependent upon the mechanical properties of the formation |
| 7316275 |
Well treating compositions containing water superabsorbent material and method of using the same |
January 8, 2008 |
| A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The water-superabsorbent material is capable of absorbing, at a minimum, its own weight. Particula |
| 7306039 |
Methods of using crosslinkable compositions |
December 11, 2007 |
| A thermal insulating packer fluid contains water and/or brine, a crosslinkable viscosifying polymer, a crosslinking agent and an optional set retarder. The composition is capable of inhibiting unwanted heat loss from production tubing or uncontrolled heat transfer to outer annuli. The |
| 7303020 |
Interventionless oil tool actuator with floating piston and method of use |
December 4, 2007 |
| An interventionless actuator for oil well tools is described wherein the actuator comprises at least one floating piston adapted to equalize a pressure differential and lock onto an actuating member. An interventionless actuator is described that is charged to an initial energy level |
| 7303018 |
Method of acidizing a subterranean formation with diverting foam or fluid |
December 4, 2007 |
| A method of acidizing a subterranean formation with a diverting agent composed of a gelled or thickened viscoelastic foam or fluid generated from (i.) an amidoamine oxide gelling agent and (ii.) an acid or foam, water and/or brine. The gelled or thickened foam or fluid may be generat |
| 7296632 |
Casing alignment tool |
November 20, 2007 |
| An alignment apparatus for use with the assembly of tubular segments with a tubular string in a well bore is disclosed. The alignment apparatus includes an actuator assembly functionally associated with an engagement assembly. Upon actuation of the actuator assembly, the engagement a |
| 7290447 |
Density measuring apparatus containing a densimeter and a method of using the same in a pipeline |
November 6, 2007 |
| A densimeter contains an inlet pipe section, a second pipe section joined to the downstream end of the inlet pipe section, and an outlet pipe section joined to the downstream end of the second pipe section. The inlet and outlet pipe sections are constrained by a support structure, wh |
| 7273108 |
Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore |
September 25, 2007 |
| Apparatus and methods are provided for removing sand and/or other fill material located in a wellbore ahead of a coiled tubing tractor and displacing the material behind the tractor. More particularly, the apparatus and methods of the present invention allow a coiled tubing tractor t |
| 7270180 |
Scaling inhibitors and method for using the same in high density brines |
September 18, 2007 |
| A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. The formulation has particular application in the removal of zinc sulfide and iron sulfide scales formed when zinc bromide brines are used as comp |
| 7264786 |
Method of scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams |
September 4, 2007 |
| Hydrogen sulfide and mercaptans may be removed from a fluid or gaseous stream by reacting the hydrogen sulfide and mercaptans in the stream with a scavenger selected from a: (i.) 1,3,5-trisalkanylamino hexahydro-1,3,5-triazine derivative; (ii.) morpholine or piperazine derivative; |
| 7255178 |
Drillable bridge plug |
August 14, 2007 |
| A method and apparatus for use in a subterranean well is described. The apparatus typically includes a mandrel and a packing element. The mandrel may have an outer surface and a non-circular cross-section and a the packing element may be arranged about the mandrel, the packing element |
| 7249633 |
Release tool for coiled tubing |
July 31, 2007 |
| A bottom hole assembly for use with fracturing or fracing a wellbore using coiled tubing is described having a first packing element and a second packing element on a mandrel. The bottom hole assembly may be run into the wellbore such that the packing elements straddle the zone to be |
| 7243727 |
Isolation assembly for coiled tubing |
July 17, 2007 |
| An isolation assembly for use with coiled tubing is described. The isolation assembly has a check valve for providing selective fluid communication through from the coiled tubing, through the isolation assembly, and into a downhole tool, such a straddle packer. The isolation assembly |
| 7231976 |
Method of treating an oil or gas well with biodegradable low toxicity fluid system |
June 19, 2007 |
| A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a blend of lactic acid ester, such as ethyl lactate, and a fatty acid ester, such as methyl soyate. The fluid system may be further in the form of a microemulsion that is formed |
| 7220709 |
Process of diverting stimulation fluids |
May 22, 2007 |
| A process for stimulating a formation is disclosed wherein a diverting fluid is used to divert an acid treatment package from a high permeability or damaged portion of a formation to a low permeability or undamaged portion of a formation. The fluid preferably forms vesicles. |
| 7219742 |
Method and apparatus to complete a well having tubing inserted through a valve |
May 22, 2007 |
| A method and apparatus for inserting a small diameter continuous hydraulic conduit or capillary tube down a well bore is presented. The methods and apparatus allow either the injection of chemicals to enhance production of oil and gas, or to provide a conduit for production up through th |
| 7213651 |
Methods and compositions for introducing conductive channels into a hydraulic fracturing treatme |
May 8, 2007 |
| Methods for the treatment of subterranean wells involving injecting a first fracturing fluid into a formation, and then injecting at least a second fracturing fluid into the formation in order to create extended conductive channels through a formation are described. The fracturing fl |
| 7210535 |
Isolation system comprising a plug and a circulation valve and method of use |
May 1, 2007 |
| An isolation system for an oil and gas well is described wherein the system comprises an isolation section and a first isolation device integral with the section and a second isolation device sealingly engaged to the section. The first isolation device may be a pressure-actuated valv |
| 7210528 |
Method of treatment subterranean formations using multiple proppant stages or mixed proppants |
May 1, 2007 |
| An increase in effective propped lengths is evidenced in hydraulic fracturing treatments by the use of ultra lightweight (ULW) proppants. The ULW proppants have a density less than or equal to 2.45 g/cc and may be used as a mixture in a first proppant stage wherein at least one of th |
| 7207386 |
Method of hydraulic fracturing to reduce unwanted water production |
April 24, 2007 |
| A method of hydraulically fracturing a hydrocarbon-bearing subterranean formation ensures that the conductivity of water inflow below the productive zone of the subterranean formation is reduced. The method consists of two principal steps. In the first step, a fracture in and below t |
| 7205264 |
Well treatment method using fluid containing lactic acid or salt thereof |
April 17, 2007 |
| Fluids comprising an aqueous acid, synthetic polymer, metal crosslinking agent and lactic acid or a salt thereof have particular applicability in fracturing subterranean formations of an oil or gas well. The lactic acid acts as a delaying agent. As a result, crosslinking of the synthetic |
| 7201232 |
Washpipeless isolation strings and methods for isolation with object holding service tool |
April 10, 2007 |
| An isolation string having an upper packer and an isolation pipe in mechanical communication with the upper packer, the isolation pipe comprises an operable valve and an object activated valve. An object holding service tool is adapted to release an object to activate the object acti |
| 7201227 |
Method and composition for treating a subterranean formation with splittable foams |
April 10, 2007 |
| Disclosed herein is a method of treating a subterranean formation utilizing a fluid having a splittable foamer, i.e., a fluid that creates a stable foam when it contacts the formation but that loses its ability to foam as it remains in contact with the formation for extended time. Th |
| 7198109 |
Double-pin radial flow valve |
April 3, 2007 |
| A valve with the following components: a pipe; an inner sub connected to the pipe; an outer sub connected to the pipe, wherein the inner and outer subs are concentric and define a sub annulus; a conduit between the sub annulus and an inside diameter of the inner sub; a sleeve slideably |
| 7191663 |
Testing apparatus and method of deriving Young's modulus from tensile stress/strain relationship |
March 20, 2007 |
| A method of testing and a tester apparatus to determine the axial stress and strain of cements under the temperature and pressures encountered by cement during use in wellbore environments. Using these stress and strain measurements, the Young's Modulus may be established for a material |
| 7188676 |
Method for displacing oil base drilling muds and/or residues from oil base drilling mud using wa |
March 13, 2007 |
| Fluid producing wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted solid particulates, including pipe dope, asphaltenes and paraffins. Such emulsions are of particular applicability in the displacement of oil base drilling muds and/or residues |
| 7172026 |
Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore |
February 6, 2007 |
| Apparatus and methods for removing sand and/or other fill material located in a wellbore ahead of a coiled tubing tractor and displacing the material behind the tractor. More particularly, the apparatus and methods allow a coiled tubing tractor to drive forward in a wellbore by removing |
| 7171814 |
Method and apparatus for carbon dioxide accelerated unit cooldown |
February 6, 2007 |
| A system and a method of its use for the accelerated cooldown of at least one unit by injecting liquid carbon dioxide via a sparger into a pipeline connected to the unit via an access valve upstream of the unit being cooled. By providing an evenly distributed flow into the system gas pri |
| 7163066 |
Gravity valve for a downhole tool |
January 16, 2007 |
| 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 embody a substant |
| 7159655 |
Method for inhibiting or controlling inorganic scale formations |
January 9, 2007 |
| A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. The formulation has particular application in the removal of zinc sulfide and iron sulfide scales formed when zinc bromide brines are used as comp |
| 7156178 |
Compositions containing a buffer and a peroxide or peracid useful for treating wells |
January 2, 2007 |
| Compositions containing a peroxide or peracid and an organic acid salt buffer are provided. Also provided is a method for utilizing such compositions for removing polymers from oil and gas wells, while simultaneously dissolving encountered calcium carbonate deposits. |
| 7156173 |
Cement compositions useful in oil and gas wells |
January 2, 2007 |
| Cement compositions containing low reactivity materials are disclosed. The compositions are useful in conditions involving high temperatures, high pressures, and tectonic forces such as oil and gas wells. The cement compositions display increased compressive strength, flexural strength, |
| 7151076 |
Low residue well treatment fluids and methods of use |
December 19, 2006 |
| A low residue well treatment fluid comprises: an aqueous solvent; a gelling agent comprising one or more modified polysaccharides, the modified polysaccharides having hydrophilic groups; and a crosslinking composition. The fluid may optionally further comprise a gel breaker, a buffer |
| 7150326 |
Bi-directional ball seat system and method |
December 19, 2006 |
| The present invention provides a bi-directional ball seat and method of use. In at least one embodiment, the present invention provides a fluid control system that includes a radial protrusion that can be selectively engaged and disengaged upstream and/or from a ball seat. For example, a |
| 7144844 |
Method of using viscoelastic vesicular fluids to enhance productivity of formations |
December 5, 2006 |
| A process for enhancing the productivity of a formation consists of introducing into the formation a viscoelastic fluid which contains at least one surfactant, at least one quaternary amine polyelectrolyte, water, and a non-aqueous solvent. The surfactant forms aggregation structures |
| 7144512 |
Method of reclaiming brine solutions using an organic chelant |
December 5, 2006 |
| A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group --CO.sub.2H or --PO(OH)R.sup.20 |
| 7137448 |
Method of cementing a well using composition containing zeolite |
November 21, 2006 |
| A cementitious composition for cementing an oil or gas well and which exhibits, when cured, increased flexural strength and a flexural strength to compressive strength ratio between from about 0.29 to about 0.80, contains a hydraulically-active cementitious material, such as Portland |
