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7204323 |
Systems and methods are described for detection and removal of underground organic and inorganic compounds utilizing underground boring tool technology. Typically a drilling fluid is flowed through a pipe or drill string, over the boring...
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6986396 |
A new method for evaluating the efficiency of a sweep for removing cuttings from a borehole in a subterranean formation during a drilling operation. The method evaluates sweep efficiency on a “mass” in versus “mass out” basis. Th...
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6662884 |
A new method for evaluating the efficiency of a sweep for removing cuttings from a borehole in a subterranean formation during a drilling operation. The method evaluates sweep efficiency on a “mass in” versus “mass out” basis. Th...
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6457538 |
A system of apparatus for use in a coring tool measures the height of a core sample being recovered and transmits data relative thereto to the surface of a formation concurrently during the coring operation. A transmitter of an electroma...
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6453738 |
A method and apparatus for retrieving magnetic casing fragments from a well using a shrouded magnet are disclosed. Retrieving casing fragments allows the determination of weight loss from the casing to assist in analyzing the integrity a...
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6453727 |
System of evaluating physical parameters such as the absolute permeability of porous rocks of a zone of an underground reservoir, from fragments taken from this zone, such as rock cuttings carried along by the drilling mud. Rock fragmen...
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5785131 |
A borehole drilling apparatus has a jacket attachable to a well head and through which a drill rod passes and which carries pressurized drilling fluid to a working end of the drill rod and out into an annulus of the borehole. The jacket ...
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5571962 |
A method and apparatus for identifying cuttings from a wellbore is disclosed. The cuttings can be identified by measuring emissions such as alpha, beta, or gamma particles which emanate from the cuttings. A continuous wellbore profile of...
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5417295 |
A drill string having a core sampling device at its lower end is suspended in an earth borehole by a rotary drilling rig at the earth's surface. Drilling fluid pulsations are monitored in the drilling fluid standpipe to generate characte...
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5215596 |
Drill cuttings are cleaned of oil-based drilling mud and oil using a cleansing agent, such as a C6-C10 carboxylic acid, that is preferentially oil soluble at one pH and preferentially water soluble at another pH. The oily cuttings are tr...
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5213625 |
Drill cuttings are cleaned of oil-based drilling mud and oil using a cleansing agent, such as a C6-C10 carboxylic acid, that is preferentially oil soluble at one pH and preferentially water soluble at another pH. The oily cuttings are tr...
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5196401 |
A method of enhancing the fragmentation and excavation of hard, solid materials such as rock formations is provided which comprises adding to the rock surface an aqueous solution including a high molecular weight nonionic polymer such as...
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5156686 |
Drill cuttings are cleaned of oil-based drilling mud and oil using a cleaning agent, such as a C6-C10 carboxylic acid, that is preferentially oil soluble at one pH and preferentially water soluble at another pH. The oily cuttings are tre...
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4959164 |
The enhancement of rock fragmentation and rock excavation by neutralizing the rock surface charge with respect to the drilling, tunneling, cutting, grinding, or polishing fluid. Water-soluble, high-molecular-weight, nonionic polymers are...
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4809790 |
A device for extracting an undisturbed sample of soil to be tested from a subsurface location uses a cutter to remove unwanted soil from above the undisturbed sample. The device is particularly intended for extraction of soil from contam...
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4735269 |
A well coring apparatus is provided with the capability for monitoring the length of the core in the inner barrel (32) of a core barrel (16) and the rate at which the core enters the inner barrel (32). The device includes a Sonic Core Mo...
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4676309 |
A perforator for perforating a subsurface formation surrounding a well bore to ensure perforation of channels in a cement sheath surrounding a casing pipe cemented in said well bore comprising a series of stacked plates, each plate conta...
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4638872 |
A well coring apparatus is provided with the capability for monitoring the length of the core in the inner barrel (32) of a core barrel (16) and the rate at which the core enters the inner barrel (32). The device includes a Sonic Core Mo...
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4601354 |
In accordance with the present invention, rotation of the inner barrel relative of the axis of symmetry of the core barrel (indicative of core twist off or core sand erosion during coring operations) is detected by a novel sensor combina...
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4499956 |
In accordance with the present invention, rotation of the inner barrel relative of the axis of symmetry of the core barrel (indicative of core twist-off or core sand erosion during coring operations) is detected by a novel sensor combina...
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4499955 |
In accordance with the present invention, rotation of the inner barrel relative of the axis of symmetry of the core barrel (indicative of core twist off or core sand erosion during coring operations) is detected by a novel sensor combina...
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4452321 |
A device in core drilling for indicating when a core barrel placed in a rotatable hollow drill rod is no longer capable of receiving a further quantity of reamed-out core material includes a valve which at said condition of the barrel co...
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3901075 |
The invention disclosed herein deals with in situ measurement of the acoucal properties of the ocean floor while ocean sediment core samples are being obtained and specifically provides means for generating a sound wave. A record is made...
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3777826 |
An improved core barrel system including a single core sampling unit that may be used in up holes or down holes. The unit is pumped through a hollow drill string until a core container in the unit reaches the core receiving position prox...
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3679001 |
A well drilling fluid comprises a solution having dissolved therein a relatively small quantity of potassium silicate or, for some applications, sodium silicate or a mixture of sodium silicate and potassium chloride. The body of the flui...
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3530710 |
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3497021 |
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3434296 |
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3344872 |
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3292717 |
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3115576 |
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2791398 |
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2747841 |
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2703697 |
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2652232 |
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2643858 |
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2609674 |
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2594292 |
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2555275 |
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2532716 |
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2422955 |
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2342253 |
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2187845 |
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2138006 |
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2046798 |
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1864113 |
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1396625 |
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3605920 |
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1283542 |
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0773562 |
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