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9034807 Spacer fluid additive  
A spacer fluid comprises a fluid and a viscosity agent. The viscosity agent is a mixture of at least two polyvinylalcohol compositions. A first polyvinylalcohol composition comprises...
9027672 Method of completing a well using a friction reducing completion fluid  
A method for reducing the friction forces between tubulars, for example coiled tubing in casing includes mixing a selected suspending agent and surfactant and polymer particles in oil, then adding...
9022147 Drilling fluid that when mixed with a cement composition enhances physical properties of the cement composition  
According to an embodiment, a drilling fluid comprises: water and a set accelerator, wherein the drilling fluid has a 10 minute gel strength of less than 20 lb*ft/100 sq ft, wherein the drilling...
8991520 Mathematical modeling of shale swelling in water based muds  
A method of servicing a wellbore comprises determining a cation exchange capacity of a sample of a shale, determining a swelling characteristic of the shale using the cation exchange capacity in...
8967298 Transmission of light through light absorbing medium  
A method and apparatus for transmitting light through a light absorbing medium in which a light transmissive fluid column or channel contiguous with the light absorbing medium is formed in the...
8950492 Invert emulsion fluid containing a hygroscopic liquid, a polymeric suspending agent, and low-density solids  
An invert emulsion treatment fluid comprises: (A) an external phase, wherein the external phase comprises a hydrocarbon liquid; (B) an internal phase, wherein the internal phase comprises a...
8936111 Invert drilling fluids having enhanced rheology and methods of drilling boreholes  
An invert emulsion drilling fluid, and a method of drilling with such fluid, having improved rheology at low mud weights and high temperatures. The improved rheology is effected with addition of...
8925653 Apparatus and method for high pressure abrasive fluid injection  
A method and system are provided for injecting high pressure abrasive fluid into an abrasive jet tool. The method and system comprise a slurry tank connected to an abrasive hopper and a low...
8881843 Managed pressure and/or temperature drilling system and method  
The present invention relates to a managed pressure and/or temperature drilling system (300) and method. In one embodiment, a method for drilling a wellbore into a gas hydrates formation is...
8871689 Drilling fluid additive and methods of stabilizing kaolinite fines migration  
A method of drilling is disclosed and includes pumping a wellbore fluid into a wellbore through an earth formation, wherein the wellbore fluid comprises a base fluid and a surface active agent...
8822385 Nanoemulsions  
Nanoemulsions have been discovered to be useful to the oil field. More particularly water-in-oil (W/O), oil-in-water (O/W) and other classes of nanoemulsions have found beneficial application in...
8813870 Arrangement and a method for monitoring an air flow in a drill rig  
An arrangement in a rock drill rig 10 has an inlet valve 31 arranged upstream from a displacement compressor 32 that is used for supplying an air flow 34 to at least one flushing hole 23 in the...
8813872 Methods and apparatus for download transfer of drill cuttings  
A drilling fluid delivery system for drilling boreholes with a drill bit, includes a primary flow circuit having a relatively high flow rate for transferring drilling fluid to and from the drill...
8757289 Underwater drilling arrangement and method for making a bore in a bed of a water body  
The invention relates to an underwater drilling arrangement and a method for making a bore in a bed of a lake, sea or river, having a service platform which can be lowered for positioning on the...
8752626 Compositions and methods for treatment of well bore tar  
Of the many compositions and methods provided herein, one method includes contacting tar resident in a well bore with a tar stabilizer comprising an acrylonitrile-butadiene copolymer; and allowing...
8703658 Drilling fluid and methods  
A drilling fluid comprising: a non-ionic surfactant including: a branched alcohol ethoxylate and/or a capped alcohol ethoxylate; and a detergent builder.
8697611 High density brines for use in wellbore fluids  
A composition and method for use in drilling or completing a subterranean well comprising a solidsfree, high-density brine composed of alkali metal polytungstate and blends thereof. These...
8672057 Method for controlling loss of drilling fluid  
Methods for drilling and treating for lost returns continuously while drilling are provided. High fluid loss drilling fluid is used, along with particulate material that forms an immobile mass in...
8627889 Drilling and fracturing fluid  
A method of fracturing a subterranean formation while drilling a well includes the steps of preparing a fluid useful for drilling a wellbore into the formation; drilling the wellbore into the...
8623790 Method of drilling a subterranean well with crosslinked polyacrylic acid  
A method of drilling a gas or oil well consists of use of a water-based drilling fluids containing high molecular weight crosslinked polyacrylic acid as viscosifying agent. The drilling fluid may...
8607895 Drilling fluid additive for reducing lost circulation in a drilling operation  
Generally, the present invention provides drilling fluid additives for reducing or controlling lost circulation in a drilling operation. The additives comprises particles. The particles comprise...
8592349 Method to prevent salt crystal agglomeration and settling in a drilling fluid  
Various salt crystal and agglomeration settling inhibiting agents may aid the ability to keep salt crystals of a desired particle size undissolved and dissolved in an aqueous drilling fluid,...
8569213 Drilling fluids having reduced sag potential and related methods  
Invert emulsion drilling fluids that have extended emulsion stability and reduced sag potential can be realized through incorporation of colloidal particles therein. The invert emulsion drilling...
8563483 Mineral-based drilling fluid and drilling method  
A high-temperature drilling fluid is disclosed based on brine and on a mixture of solids of controlled grain size, with water, dissolved salts and insoluble mineral solids comprising at least in...
8544565 Lost circulation control fluids for naturally fractured carbonate formations  
Compositions including relatively low reactivity acids and having a pH of from about 2 to about 5, mixed with viscoelastic surfactants (VESs) and internal breakers may serve as fluids, in a...
8541346 Methods of degrading subterranean filter cakes  
The present invention relates to bridging agents for use in subterranean formations, to well drill-in and servicing fluids comprising such bridging agents, and to methods of using such bridging...
8479817 Method and composition for curing lost circulation  
A system for curing lost circulation is made of fibers and a material able to stick fibers in a network when activated. Such activation can be temperature or pH change or both. The fibers can be...
8469118 Drilling fluid containing carbon nanotubes  
A viscoelastic drilling fluid for drilling in underground rock formations, comprising (a) an aqueous and/or organic liquid base,(b) at least one weighting agent, in particulate form, with a mass...
8453735 Method and biodegradable water based thinner composition for drilling subterranean boreholes with aqueous based drilling fluid  
An inhibitive water-based polymer mud system and method for using the system in drilling and in stabilizing wellbores is disclosed for use in water sensitive formations as an alternative to...
8424619 Drilling fluid  
This invention is based upon the finding that certain chlorosulfonated α-olefin copolymers can be beneficially utilized in drilling fluids that are utilized in drilling subterreanean wells. For...
8413745 Water-based mud lubricant using fatty acid polyamine salts and fatty acid esters  
Water-based drilling mud lubricants using a blend of fatty acid polyamine salts and fatty acid esters give synergistically better lubricity results than either component used separately. For...
8393411 Method for controlling loss of drilling fluid  
Methods for drilling and treating for lost returns continuously while drilling are provided. High fluid loss drilling fluid is used, along with particulate material that forms an immobile mass in...
8357639 Nanoemulsions  
Nanoemulsions have been discovered to be useful to the oil field. More particularly water-in-oil (W/O), oil-in-water (O/W) and other classes of nanoemulsions have found beneficial application in...
8347983 Drilling with a high pressure rotating control device  
A Drill-To-The-Limit (DTTL) drilling method variant to Managed Pressured Drilling (MPD) applies constant surface backpressure, whether the mud is circulating (choke valve open) or not (choke valve...
8293686 Emulsified polymer drilling fluid and methods of preparation  
A water-based polymer drilling fluid, containing effective quantities of surfactants having HLB numbers equal to or greater than approximately 7, emulsifies oil and bitumen contained in oil sand...
8288324 Wellbore fluids comprising poly(trimethylene ether) glycol polymers  
Wellbore fluids containing poly(trimethylene ether)glycols are provided. The wellbore fluids can provide enhanced functionality, improved cost effectiveness, and reduced environmental impact as...
8281859 Methods and compositions comprising cement kiln dust having an altered particle size  
Methods and compositions are disclosed that comprise cement kiln dust having a mean particle size that has been altered. An embodiment discloses a subterranean treatment method comprising:...
8272455 Methods for forming wellbores in heated formations  
A method for forming a wellbore in a heated formation includes flowing liquid cooling fluid to a bottom hole assembly in a wellbore in a heated formation. At least a portion of the liquid cooling...
8252728 Drilling fluids comprising hydroxylated polymers  
Drilling fluids comprising polymers containing hydroxylated structural units are useful as accretion inhibiting agents, and/or as fluid rheology controlling agents, and/or as filtrate reducing...
8235119 Drilling fluid and method for reducing lost circulation  
Lost circulation of drilling fluid is one of the most serious and expensive problems facing the drilling industry. The present invention relates to an improved drilling fluid for reducing or...
8227382 Breaker fluids and methods of using the same  
A method of cleaning a wellbore drilled with a drilling fluid that forms a filter cake that includes emplacing a breaker fluid into the wellbore, the breaker fluid comprising: an aqueous fluid; a...
8220565 Treatment of subterranean formations  
A method of preparing and using a subterranean formation stabilization agent. The stabilization agent includes a guanidyl copolymer and may be admixed with a fracturing fluid and optionally brine....
8193124 Emulsifier free oil-based wellbore fluid  
A wellbore fluid that includes an oleaginous base fluid; and a silanated weighting agent is disclosed. In particular, the silanated weighting agents may be produced by reaction between an alkyl...
8183181 Oil field treatment fluids comprising zwitterionic betaine-group-containing polymers  
The present disclosure is directed to a method comprising: mixing (i) a zwitterionic polymer prepared by inverse emulsion polymerization of at least one monomer Ab comprising a betaine group and...
8176981 Fluorinated surfactants and methods of using the same  
A composition comprising a nonionic fluorinated polymeric surfactant having a weight average molecular weight of least 100,000 grams per mole, the nonionic fluorinated polymeric surfactant...
8163675 Emulsifier based on polyamines and fatty acid/maleic anhydride  
The present invention generally relates to a polyamide emulsifier, to a drilling fluid composition that comprises said emulsifier and to a method of drilling a borehole into a subterranean...
8148303 Surfactant additives used to retain producibility while drilling  
A method comprises providing a drilling fluid comprising: an aqueous fluid; and a microemulsion surfactant; and drilling a well bore in a subterranean formation comprising an oleaginous fluid...
8141660 Excavator apparatus for underground excavation  
An excavator for underground excavating arranged to perform excavating work with low vibration and low noise. A rotary excavator and an underground excavating method are also provided. The...
8141661 Enhanced oil-based foam drilling fluid compositions and method for making and using same  
New oil-based foam drilling fluids for oil and/or gas wells include a base oil, a foaming agent and a polymer including at least one aromatic olefin monomer and at least one diene monomer. The...
8138124 Drilling fluid with circulation loss reducing additive package  
A drilling fluid includes a base fluid and a circulation loss reducing additive package having a polysaccharide, a cellulose derivative and a pH controlling component.