Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 5341886 | System for controlled drilling of boreholes along planned profile An improved method and apparatus for controlling the direction of advance of a rotary drill to produce a borehole profile substantially as preplanned with minimal curvature while maintaining optimum drilling performance. The preferred embodiment of the sy... | 08/30/1994 |
| 5318136 | Drilling process and apparatus In a drilling process speed, bit thrust and penetration are monitored. Data stored in a data base relating rotational speed and thrust as adjustable variables is correlated with data on the penetration rate as controlled parameter to produce a matrix to e... | 06/07/1994 |
| 5316090 | Attitude control device and drilling-direction control device An attitude control device has a plurality of harmonic drive mechanisms of the hollow type, preferably first and second harmonic drive mechanisms. First and second rotational members are connected to the outputs of the first and second harmonic drive mech... | 05/31/1994 |
| 5279372 | Method of drilling holes in rock The invention relates to a method of drilling holes in rock. In the method, holed (4a-4n, 6a-6n) are drilled in the rock (5) in order to break it into a desired shape. To drill the holes, the drill bit of a rock drilling equipment is positioned successive... | 01/18/1994 |
| 5240082 | Rotary boring machine A rotary boring machine comprises a base machine placed on the ground, a boring drill provided with the base machine and driven for rotation, a dip gauge provided at the tip end of the boring drill, a first circuit provided in an intermediate portion of t... | 08/31/1993 |
| 5220963 | System for controlled drilling of boreholes along planned profile An improved method and apparatus for automatically controlling the direction of advance of a rotary drill to produce a borehole profile substantially as preplanned with minimal curvature while maintaining optimum drilling performance. The system is capabl... | 06/22/1993 |
| 5034929 | Means for varying MWD tool operating modes from the surface A method and apparatus for establishing a remote communications link from the rig floor to the downhole MWD system is presented. In accordance with the present invention, the state of a physical condition downhole is changed in a predetermined timed seque... | 07/23/1991 |
| 4976321 | Horizontal earth boring machine and method An earth boring apparatus is illustrated including an engine and an earth boring string wherein a hydraulic clutch driven by the engine is supplied with hydraulic fluid through an electrically operated valve controlled by a manually operated trigger so th... | 12/11/1990 |
| 4751971 | Automatic augering device and method A mobile automatic augering device, capable of augering a hole, entrapping a volume of earth removed from the hole to create a work space above the hole, and then backfilling the hole with the removed earth is disclosed. The present invention is character... | 06/21/1988 |
| 4690228 | Changeover bit for extended life, varied formations and steady wear A roller cone bit may be used as a rotating drag bit by treating the roller cones as carriers for a plurality of distinguishable types of drag cutters. The roller cones are each coupled to a mechanism which selectively allows rotation of the roller cones.... | 09/01/1987 |
| 4679489 | Automatic leveling system for blast hole drills and the like A dual automatic leveling system for a blast hole drill during raising and lowering which includes "fine" level sensors to detect an attitude within a fine level range and "coarse" level sensors to detect an attitude outside a coarse level range which is ... | 07/14/1987 |
| 4646277 | Control for guiding a boring tool A control system guides a boring tool in a borehole. The tool has a longitudinal tool axis and includes a driver for advancing the tool axially through the earth and steering mechanism for directing the motion of the tool relative to the tool axis in resp... | 02/24/1987 |
| 4639868 | Control method for drilling apparatus which makes use of a final drilling pattern transformed from primary and secondary patterns A drilling method of drilling an imaginary facing for excavating a curved tunnel such that the imaginary facing is nonparallel to an existing facing. The drilling method includes the steps of obtaining a first equation for transformation between a primary... | 01/27/1987 |
| 4606415 | Method and system for detecting and identifying abnormal drilling conditions A method and system for detecting and identifying abnormal drilling conditions. It determines the normal pump speed-pressure ratio over the range of usual working conditions. It measures the output pressure from the pump. And it measures the speed of the ... | 08/19/1986 |
| 4604724 | Automated apparatus for handling elongated well elements such as pipes A derrick is provided with a vertically movable elevator for suspending a string of elongated well elements, such as pipes. An immovable lower support is provided for suspending the string, and an automatic tong is provided for screwing and unscrewing pip... | 08/05/1986 |
| 4535851 | Fluid flow measurement system A system, or apparatus combination, and apparatus components, for the measurement of fluid flow. Such system, or apparatus can be used, e.g., for measuring the amount or flow of drilling fluid, or mud, introduced into a well bore, the amount or flow of mu... | 08/20/1985 |
| 4506745 | Method and means for drilling in rocks A method of drilling long and straight holes in rocks is based on the use of a drill rig which may be aligned by means of a laser beam and which comprises a hollow drill stem with a pressure device for guiding the drill stem in a correct direction on appl... | 03/26/1985 |
| 4407374 | Device for controlling the orientation of bore holes A device for controlling the inclination of underground bore holes is in form of a drill guide rod having an outer element and an inner element which rotates coaxially in the outer element. Gib-shaped members can be pivoted out from the outer element in t... | 10/04/1983 |
| 4407017 | Method and apparatus for controlling drilling process A method for controlling drilling process based on the use of an adaptive model of drilling process comprises two control modes of which one is a multicycle rock formation trial mode and the other mode is a drilling mode proper. During the first cycle of ... | 09/27/1983 |
| 4403664 | Earth boring machine and method An earth boring machine and method are disclosed. An above-ground reference line, such as a laser beam, is established for a hole to be bored. The direction of the reference line is detected. The direction of a cutting head of the boring machine in a bore... | 09/13/1983 |
| 4341271 | Rock drilling method A rock drilling method according to which the drill is subjected to successive axial strikes and is rotated around its longitudinal axis. The direction of rotation is repeatedly reversed after the drill has rotated at least one revolution in one direction... | 07/27/1982 |
| 4266171 | Advance control system for use in a drilling apparatus A drilling apparatus includes a drilling rod, a feed motor for advancing and retreating the rod in relation to an object to be drilled, and a control system for controlling the movement of the rod. The control system includes a pulse generator for produci... | 05/05/1981 |
| 4241796 | Active drill stabilizer assembly The present disclosure concerns an active drill stabilizer assembly for arrangement in a drill string directly behind a conventional or modified drill bit that utilizes drilling fluid as a sensing and working deviation/correction energy source. In a sensi... | 12/30/1980 |
| 4226311 | Rotary drive disc brake for drawworks A disc-type brake apparatus adapted for installation in combination with the drawworks of a well bore drilling operation for automatically sensing any reverse torque situation in the drill pipe and quickly set the brake for precluding transmission of any ... | 10/07/1980 |
| 4169483 | Hydraulic jet drill stem and bit unplugging device A device for cleaning compacted clay, fine gravels, sand, and other blocking agents from the inside of drill stems or drill bits. The device cleans away the unwanted matter by use of concentrated streams of high pressure liquid traveling at very high velo... | 10/02/1979 |
| 4165789 | Drilling optimization searching and control apparatus An apparatus employed in the searching of the optimized rate of penetration of a drill into a given medium based upon the two drilling parameters of thrust and speed of revolution. Preset base values of both parameters are input into the drilling control ... | 08/28/1979 |
| 4164871 | Push drill guidance indication apparatus An electronic guidance system for a push drill that is remotely guided by the operator. The system functions to maintain continual indication as to the attitude of the drilling apparatus, i.e., pitch, roll and distance to rock formations overlying or unde... | 08/21/1979 |
| 4079795 | Method and a device for drilling with several tools in simultaneous operation A method for drilling boreholes utilizing a plurality of simultaneously operated boring tools. During a drilling operation the loading forces on the tools are measured and constantly compared with a predetermined limiting value representative of a limitin... | 03/21/1978 |
| 4022284 | Automatic alignment system for earth boring rig An automatic alignment control system for an earth boring rig utilizes sensor means on the drilling mast for actuating switches connected to power controls. The sensor means reacts to misalignment of the drilling mast vertical axes to close appropriate sw... | 05/10/1977 |
| 3946559 | Heave compensating devices for marine use A heave-compensating device particularly for floating oil drilling rigs incorporates a passive load-supporting system capable of being set to exert a chosen datum load-supporting force and an active force-modifying system operative when the force exerted ... | 03/30/1976 |
| 3939926 | Portable earth boring machine A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by a steering head particularly adapted for r... | 02/24/1976 |
| 3938597 | Portable earth boring machine A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by a steering head positioned at the front of... | 02/17/1976 |
