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7464771 |
A downhole abrading tools has a body with a first end for connection with a rotating component of a drill string, and a cutting end for rotation in unison with the body, the cutting end having an abrading matrix containing an abrasive ma...
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7410011 |
The extent of invasion of a water-based drilling fluid into a formation may be determined using at least two tracers where one is deuterium oxide and the other is a water-soluble tracer. One such method includes introducing a drilling fl...
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7178590 |
Improved well fluids that include hollow particles, and methods of using such improved well fluids in subterranean cementing operations are provided. Also provided are methods of cementing, methods of reducing annular pressure, and well ...
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7026950 |
The present invention provides a method and apparatus for generating one or more than one physically detectable physical influence changes to control or manipulate a down hole device. The present invention intercepts existing control sig...
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7009198 |
A method of detecting a non-fixed object created during hole drilling operations on a system ( 12 ) includes applying a light emitting lubricant ( 25 ) to a drill bit ( 37 ) of a hole-drilling device ( 31 ). The light emitting lubricant ...
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6908262 |
A system for driving a large diameter caisson into the ground, comprising a crane assembly, a plurality of vibratory devices, a clamp assembly, a suspension assembly, and a timing system. Each vibratory device generates a vibratory force...
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6725926 |
Compositions and methods for determining the source of treatment fluids being produced from a production formation having multiple zones by introducing a treatment composition having a tracking material into a zone in the subterranean fo...
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6659175 |
Disclosed is a method of determining the extent of recovery of materials injected into a oil well comprising the steps of: a) preparing a material to be injected into an oil well; b) admixing therewith a chemical tracer compound at a pre...
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6374668 |
A gas analyzer for an oil drilling rig normally flows gas captured from a mud pit source through parallel paths from the gas source to a total gas analyzer. One of the paths is a loop path. Periodically the loop path is switched from the...
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6125786 |
The invention provides a warning to the excavation above a pipe, conduit or cable laid underground by a service utility by the directional drilling method by providing a coloured area of drilling mud and/or soil about the pipe, conduit o...
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5277263 |
In a well drilling operation (10), drilling fluid (70) is used to remove rock cuttings (68) and associated formation fluids released by the drill bit (84) and transport them to the surface. At the surface, a portion of these cuttings and...
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5140527 |
In the rotary drilling of oil wells a drilling mud is used both to transport the cuttings up to the surface and to impose an hydrostatic pressure on the walls of the borehole. For these functions the mud must for example have an acceptab...
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5027379 |
A method of determining the invasion of drilling mud filtrate into a core sample from a borehole in a subterranean rock formation, comprising using a drilling mud which forms a filter cake during coring of the borehole thereby to limit i...
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4987960 |
A method of determining dilution of a well bore fluid, such as a drilling fluid, comprising preparing a drilling fluid having a known concentration of bromide ion, using the drilling fluid, recovering a sample of the used drilling fluid,...
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4904603 |
The invention in one aspect provides a method of testing drilling mud in use which comprises periodically sampling the circulating mud and analyzing its aqueous filtrate at the rig site by ion chromatography for selected positive and neg...
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4807469 |
For monitoring drilling mud circulation there is incorporated in the supply mud a known amount or concentration of at least one tracer ion which is substantially non-interactive with the other mud components and with the strata drilled, ...
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4787990 |
Disclosed is a low toxicity oil for use in drilling fluids. The oil consists essentially of branched- and cyclic-paraffins having 11 to 17 carbon atoms per molecule and further having a low aromatic content of less than about 1% and a lo...
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4708212 |
Lag-determining method and apparatus which provides for determination of and an indication of when borehole cuttings from preselected depths arrive at the surface of the earth is disclosed and includes devices for inputting the value of ...
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4635735 |
An oil well drilling rig (10) recirculates drilling mud which is analyzed continuously by pumping it through a gas separation unit (72) where the gases in the mud become separated and mixed with a carrier gas and are conveyed to gas anal...
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4630243 |
Measurement while drilling apparatus for detecting and communicating information relative to downhole parameters and/or characteristics of the earth strata via an electrically conductive drill string composed of a plurality of lengths of...
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4495803 |
A method for monitoring efficacy of removal of cuttings generated during drilling of a well is disclosed which features injection of artificial cuttings into the well-drilling fluid at a controlled rate and monitoring the rate of return ...
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4447340 |
In a method of tracing a well drilling mud by determining the concentration of a tracer ion in samples of filtrate from a drilling mud which contains a predetermined concentration of the tracer ion, the improvement wherein the tracer ion...
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4401169 |
A drop device, method and article of manufacture used in measuring lagtime in the drilling of a well. A unique container with calcium carbide is inserted upwardly by its guide end into the open end of a pin connection prior to its thread...
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4352674 |
In a method of tracing a well drilling mud by determining the concentration of a tracer ion in samples of filtrate from a drilling mud which contains a predetermined concentration of the tracer ion, the improvement wherein the tracer ion...
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4312414 |
An apparatus (10) and method for obtaining oil and water saturation data from subterranean formations includes a drill bit (12) for boring a well core (26) containing the fluids. A core-catcher bowl (18) guides the well core (26) in the ...
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4290498 |
There is disclosed an ablatible drill comprising a soft or frangible matrix having embedded therein a multiplicity of hard inclusions which act as cutting teeth. During drilling, the matrix gradually wears away so that worn inclusions ar...
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3716426 |
For the expulsion of radioactive indicators from tracer cavities in drill tools for deep wells and similar boreholes propellants are used which do not react with the water of the circulating drilling fluid in stoichiometric proportions. ...
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3533243 |
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3205353 |
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3155176 |
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3111491 |
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3020952 |
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3011566 |
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2868506 |
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2703697 |
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2700897 |
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2696468 |
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2681567 |
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2659046 |
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2658725 |
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2658724 |
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2658284 |
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2510300 |
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2468905 |
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2461164 |
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2457960 |
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2445494 |
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2301191 |
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2217043 |
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2207348 |
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