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7278497 |
The present invention generally provides an inexpensive method for drilling a multilateral wellbore where the pressure exerted on a formation of interest by a column of drilling fluid may be controlled. In one aspect, a method for drilli...
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7243738 |
A process for underbalanced drilling into multiple coal and shale formations, and dewatering the drilled formations, which includes drilling a first borehole through several coal seams to a certain depth; lowering an upstock on the end o...
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7185718 |
A method and system of drilling straight directional and multilateral wells utilizing hydraulic frictional controlled drilling, by providing concentric casing strings to define a plurality of annuli therebetween; injecting fluid down som...
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7111684 |
Subterranean fluids are provided that have improved environmental characteristics, and more particularly, subterranean fluids are provided that include a hydraulic cement in an invert emulsion. Methods of using such fluids in subterranea...
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7090036 |
A system for controlling drilling mud density at a location either at the seabed (or just above the seabed) or alternatively below the seabed of wells in offshore and land-based drilling applications is disclosed. The present invention c...
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6981560 |
A method and apparatus for delivering a well treatment fluid to a productive zone of a subterranean formation at the same time that a well bore is being drilled is provided. The method includes the steps of delivering a drill-in fluid to...
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6966392 |
A method for controlling drilling mud density at a location either at the seabed (or just above the seabed) or alternatively below the seabed of wells in deep water and ultra deep water applications. The mud recirculation system may be u...
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6926101 |
A system and method for controlling drilling mud density at a location either at the seabed (or just above the seabed) or alternatively below the seabed of wells in deep water and ultra deep water applications. A base fluid of lesser den...
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6923275 |
A process for underbalanced drilling into multiple coal and shale formations, and dewatering the drilled formations, which includes drilling a first borehole through several coal seams to a certain depth, defined as a cased borehole; low...
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6877563 |
Methods of drilling and completing open hole well bores and methods of removing filter cake comprised of a gelling agent and calcium carbonate are provided. A method of the invention for removing filter cake comprised of a gelling agent ...
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6843331 |
A method and apparatus for controlling drilling mud density at a location either at the seabed (or just above the seabed) or alternatively below the seabed of wells in deep water and ultra deep water applications combines a base fluid of...
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6802379 |
A method for drilling a well below a body of water as disclosed which includes injecting into the well, at a depth below the water surface, a liquid having a lower density than a density of a drilling mud producing a mixture of drilling ...
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6745855 |
A method and system of drilling straight directional and multilateral wells utilizing hydraulic frictional controlled drilling, by providing concentric casing strings to define a plurality of annuli therebetween; injecting fluid down som...
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6733207 |
The present invention provides an environmental remediation system and method. In one embodiment, the system comprises a nozzle formed from a plurality of tubulars mounted parallel with respect to each other. In one embodiment, a mixing ...
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6634442 |
Process for using biodegradable drilling muds, characterized in that a able surface sludge which is stable up to about 100° C., with an adjustable filtrate-reducing power of from 2 to 13 cm 3 depending on the amount of filtrate-reducin...
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6536540 |
A method and apparatus for controlling drilling mud density at or near the seabed of wells in deep water and ultra deep-water applications combines a base fluid of lesser density than the mud required at the wellhead to produce a diluted...
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6505691 |
The invention is a subsea pump that includes pumping elements, each pumping element including a pressure vessel with a first and a second chamber therein and a separating member disposed between the first and second chambers. The first a...
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6457540 |
A method and system of drilling straight directional and multilateral wells utilizing hydraulic frictional controlled drilling, by providing concentric casing strings to define a plurality of annuli therebetween; injecting fluid down som...
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6267186 |
The method for releasing the stuck pipe of the present invention uses a combination of components which oxidize the mud cake and generated gas bubbles to create an upward buoyancy for the oxidized mud cake. The spotting method of the pre...
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6105691 |
A drilling fluid contains caustic, a natural wax, a natural thinner, glycerol, phosphoric acid and/or boric acid, and optionally a gel. The drilling fluid can be prepared in modules. Each module contains additional compounds to improve o...
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6065550 |
A method and system of drilling multiple radial wells using underbalanced drilling, by first drilling a principal wellbore; then providing a first carrier string having a deflection member on its lowermost end to a certain depth within t...
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6039128 |
A method and system for obtaining core samples using a coring fluid. During the drilling phase of hydrocarbon wells and the like, drilled with existing drilling systems, the bit that drills the well is driven by a string of rotating pipe...
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5846913 |
The invention concerns wellbore fluids suitable for use in the oil and gas exploration and production industries and embraces fluids used for drilling, completion, workover or packing of wellbores. The invention is especially concerned w...
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5720356 |
A method and system of drilling multiple radial wells using underbalanced drilling, by first drilling a principal wellbore. There would then be provided a first carrier string having a deflection member on its lowermost end to a certain ...
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4718503 |
A method of drilling a borehole is provided using a drill bit coupled to the lower end of a pair of concentric drill pipes. During drilling a first low viscosity fluid, such as oil or water, is circulated through the pipes while a second...
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4694911 |
A percussion drilling tool assembly is provided which operates under fluid pressure to reciproce a hammer, the hammer is disposed in a barrel assembly and operates to strike an anvil bit shank to cause the bit to thereby penetrate a rock...
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4624327 |
A method and apparatus for drilling combines the advantages of a high pressure fluid jet with a mechanical drill bit without the high horsepower requirements and associated equipment wear of prior jet drilling systems. A two fluid system...
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4534427 |
An abrasive-fluid jet apparatus and process for drilling holes in rock having a rotary drill bit with multiple abrasive-fluid jet nozzles in the face of the bit and a stationary drill head housing torque generation apparatus and a rotary...
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4185703 |
This invention concerns the production of very deep boreholes. A rotary drilling tool is suspended at one end of a very long line of supporting elements such as a cable. During at least the entire duration of the drilling operation, the ...
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4116285 |
This invention concerns the production of very deep boreholes. A rotary drilling tool is suspended at one end of a very long line of supporting elements such as a cable. During at least the entire duration of the drilling operation, the ...
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4103749 |
A centrifugal cleaner powered by a turbine are both downhole in a housing at the end of a drill string. A branch of a drilling mud stream is cleaned of solid matter by the centrifugal cleaner. A branch of the clean fluid drives the turbi...
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3738437 |
The cost of drilling a water sensitive shale is reduced by first enhancing drilling rate by circulating a clear drilling fluid, then avoiding borehole instability due to shale-water interaction by circulating an aqueous solution of parti...
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3598192 |
An apparatus for sealing a rotary drill to an encased hole which consists of an annular resilient member secured to the hole casing and a cylindrical body mounted above the resilient member. A rotatable housing is mounted on the cylindri...
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3509951 |
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3461980 |
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3307625 |
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3040822 |
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3040821 |
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3040820 |
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2716018 |
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2643094 |
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2425193 |
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2373323 |
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2283510 |
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2264449 |
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2252669 |
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2195752 |
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2146732 |
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2043504 |
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1762012 |
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