摘要:
Apparatus for altering the length of a down-hole tool assemblly is described. The apparatus comprises a main housing (1), a slide (13) movable within the housing between a retracted position and an extended position, and latching means (6,755,33,41) to releasably secure the slide (13) to the housing (1) when the slide (13) is in either the extended position or the retracted position. The latching means (6,7,33,41,55) is activated and de-activated by fluid pressure within the apparatus where the apparatus forms part of a drill string, the fluid is typically drilling mud which is pumped through the drill string and the apparatus and the pressure is changed by changing the rate of mud flow through the drill string.
摘要:
Method and apparatus for manufacturing polycrystalline diamond stud assemblies for a drill bit. The stud assembly is cylindrical in form and has a truncation at one marginal end thereof. The truncated end includes a shelf which forms a land positioned perpendicular to a back to provide a seat for the polycrystalline diamond cutter element. The land and back lie in perpendicular planes which intersect the longitudinal axial centerline of the stud. The cutter element is semicircular in form and represents a cylinder or wafer which has been bisected by cutting so that the diameter of the cylinder is received against the land while the rear face of the cutter element is received against the back. The cutter element is fabricated in a fixture having a cavity therein which receives the stud and element therewithin, and spaced abutment means so that one abutment means can be moved towards the other to place the elements of the stud assembly in compression. Between one of the abutment means and the stud assembly is a shim having a very high coefficient of expansion with respect to the stud, cutter element, and the fixture. The fixture containing the stud assembly is heated, thereby causing the rear face and bottom of the element to be bonded to the back and land of the stud. The fixture is cooled, and the finished stud assembly removed therefrom to provide an improved polycrystalline diamond cutter assembly.
摘要:
A drill bit having a lower formation engaging face thereon and a plurality of radially spaced apart slots which communicate the face with an upper reduced part of the bit body so that drilling fluid can be returned to the surface of the earth. The bit has an internal counterbore which terminates short of the face and forms a passageway through which drilling fluid can flow. A plurality of radially spaced apart lateral passageways communicate the axial counterbore with the slots. A nozzle passageway communicates the face of the bit with the outer marginal end of the lateral passageways, and the lateral passageways are plugged adjacent to the slots. A nozzle is placed within the outer marginal end of the nozzle passageways. Drilling fluid is forced to flow down through the axial counterbore, and through the nozzles which are affixed to the face of the bit. This arrangement of the drilling fluid flow passageway enables the nozzles to be positioned in the most optimum manner for maintaining the cutters of the bit in a clean and efficient cutting condition. This described arrangement of the passageways and nozzles also enables the cutters to be arranged in the most optimum pattern for penetrating downhole formations.
摘要:
A projectile fuel system has with a liquid fuel tank, a liquid oxygen tank, a first turbine, and a second turbine. A combining device merges a first carbon dioxide exhaust with the second supercritical carbon dioxide exhaust to form a first heated supercritical carbon dioxide. A control valve proportions the first portion of heated supercritical carbon dioxide and the second portion of heated supercritical carbon dioxide to each of the first turbine and the second turbine, adjust total flow rate both of the first portion of heated supercritical carbon dioxide and the second portion of heated supercritical carbon dioxide and adjust the total flow of supercritical carbon dioxide from a jacket.
摘要:
The present invention provides a system for presenting media content. A user device (such as a personal computer, tablet, or smart phone) receives media elements from a media repository. The media repository may be remote. The device displays references associated with the media elements in a display area. The device outputs media content (e.g., music or video) associated with each of the media elements for a limited duration (e.g., 30 seconds). While outputting, the references displayed in the display area are scrolled. The display area may be provided as a 3D drum.
摘要:
A selectively liftable platform mechanism is first provided. The platform mechanism generally includes a trailer, a platform, and a support structure on the trailer for pivotally raising the platform from a lowered position to an elevated position. The support structure includes a ladder having a distal end pivotally connected to the platform and a proximal end pivotally and slidably connected to the trailer. The proximal end of the ladder is movable along the longitudinal axis of the trailer in order to level and stabilize the platform into a viewing position. A method for erecting a shooting house is also provided. The shooting house is positioned onto the liftable platform mechanism.
摘要:
The present invention includes computer instructions that facilitate characterizing a geometry piece based upon one or more received input selections, generating a temporary dimension type based, at least in part, upon the characterization, storing the temporary dimension type, and displaying the temporary dimension type. In one embodiment, the computer instructions are part of a mechanical design software application. In one embodiment, the mechanical software application including the computer instructions are embodied in a distribution storage medium.
摘要:
An apparatus for a programmable self sanitizing water dispenser apparatus with a digital computer as well as a programmable method for generating ozone for cleaning the reservoir and the water contained within it.
摘要:
A process for providing regions of substantially lower fluorine content in a fluorine-containing dielectric comprises exposing the fluorine-containing dielectric to a reactive species to form volatile byproducts.