Matches 1 - 37 out of 37


Match Document Document Title
8757290 Method of monitoring wear of rock bit cutters  
A method of monitoring the wear of drill bits for drilling wells in earth formations, several embodiments of an improved drill bit for drilling a well in an earth formation, and methods of...
8627902 Estimating drill cutting origination depth using marking agents  
A method for estimating a depth from which cuttings have been recovered from a well may include varying a parameter of one or more marking agents added into a drilling fluid circulated into the...
8172007 System and method of monitoring flow in a wellbore  
A system and method for releasing a marker within a wellbore. The system and method includes a sensor that detects movement or a position of the marker within the wellbore. The marker may be...
8006781 Method of monitoring wear of rock bit cutters  
A method of monitoring the wear of drill bits for drilling wells in earth formations, several embodiments of an improved drill bit for drilling a well in an earth formation, and methods of...
7635033 Downhole abrading tool having taggants for indicating excessive wear  
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...
7565928 Downhole abrading tool having a taggant injection assembly for indicating excessive wear  
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 downhole abrading tool...
7410011 Method to determine the concentration of deuterium oxide in a subterranean formation  
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...
7178590 Well fluids and methods of use in subterranean formations  
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,...
7026950 Motor pulse controller  
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...
7009198 Pattern method and system for detecting foreign object debris using a fluorescent drilling lubricant  
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...
6908262 Systems and methods for driving large diameter caissons  
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...
6725926 Method of tracking fluids produced from various zones in subterranean wells  
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...
6374668 Gas analyzer  
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....
6125786 Underground warning system for underground conduits or pipes  
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...
5277263 Method for measuring formation fluids in drilling fluid  
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...
5140527 Method for the determination of the ionic content of drilling mud  
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...
5027379 Method for identifying drilling mud filtrate invasion of a core sample from a subterranean formation  
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...
4987960 Well fluid and test method  
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,...
4904603 Monitoring drilling mud  
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...
4807469 Monitoring drilling mud circulation  
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...
4787990 Low toxicity oil-based drilling fluid  
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...
4708212 Method and apparatus for optimizing determination of the originating depth of borehole cuttings  
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...
4635735 Method and apparatus for the continuous analysis of drilling mud  
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...
4630243 Apparatus and method for logging wells while drilling  
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...
4495803 Method of monitoring the growth of cuttings beds in angled well bores  
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...
4447340 Method of tracing a well drilling mud  
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...
4401169 System for lagtime measurement during drilling  
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...
4352674 Method of tracing a well drilling mud  
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...
4312414 Method and apparatus for obtaining saturation data from subterranean formations  
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...
4290498 Ablatible drill  
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...
3533243 METHOD OF LAYING UNDERGROUND PIPES,CONDUITS AND THE LIKE SO AS TO MAKE THEIR PRESENCE EASILY DETECTABLE  
3205353 Determination of contamination of underground formation samples by drilling fluid using radiation absorption analysis methods  
3155176 Bore hole apparatus for marking drilling mud  
3111491 Electrically conductive oil-base drilling fluids  
3020952 Method of volumetric determination of well bores and the like  
3011566 Bearing wear indication for a roller bit  
2868506 Determination of fluid movement in bore holes  

Matches 1 - 37 out of 37