Class / Patent application number | Description | Number of patent applications / Date published |
175232000 | WITH MEANS MOVABLE RELATIVE TO TOOL BELOW GROUND TO STOP FLOW TOWARD BORE BOTTOM | 7 |
175234000 | With longitudinally spaced valve seats | 1 |
175235000 | Seat engaged to stop upward flow | 1 |
20140174832 | OVERSHOT ASSEMBLY AND SYSTEMS AND METHODS OF USING SAME - An overshot assembly for operative coupling to a wireline and a head assembly within a drilling system. The overshot assembly has at least one latch member that securely engages the inner surface of the head assembly without the use of a spearhead. | 06-26-2014 |
175236000 | In sample receiver removable through below-ground tool shaft | 2 |
20140299383 | Sampling Tool With A Multi-Port Multi-Position Valve - A downhole sampling tool includes a cam configured to rotate about a central axis. Two or more pistons engage a cam track such that rotation of the cam causes the pistons to reciprocate between first and second piston positions. Corresponding fluid flow lines are opened and closed when corresponding ones of the plurality of pistons reciprocate between the first and second piston positions. | 10-09-2014 |
20140353044 | CORE BARREL HEAD ASSEMBLY - A valve assembly for use in an inner tube member of a core barrel head assembly positionable within a drill string of a drilling apparatus. The piston member of the valve assembly is located between a fluid pressure communication port and a fluid flow port to hold the retracting case in an up position and the latches retracted. After an increased fluid pressure has pushed the piston member past the annular element or bushing, the piston member substantially restricts fluid flow through the bushing and allows the retracting case to move to a down position and extend the latches. If the latches are not extended due to an obstruction or misalignment, the retracting case will prevent the piston member from completely passing through the bushing, thus maintaining high fluid pressure due to the flow ports remaining closed, and indicating to the driller that the latches have not properly latched. | 12-04-2014 |
175237000 | Means comprises dropped element | 1 |
20140291031 | Drillstring Valve - A drillstring valve has an inlet mountable to a drillstring, an outlet and a passageway extending between the inlet and the outlet in a predetermined operating condition. In accordance with an embodiment, the drillstring valve comprises a stop element adapted for receiving a valve element wherein the stop element comprises at least one protrusion extending into a passageway portion of the passageway to thereby retain the valve element. According to an embodiment, the at least one protrusion is spaced from an inlet edge having a continuously reduced diameter in downstream direction. According to a further embodiment, the stop element comprises two or more protrusions which are spaced in circumferential direction of the passageway portion into which the at least two protrusions extend. | 10-02-2014 |
175239000 | With undisturbed core receiver | 3 |
20100133014 | Core Catcher and Corer Having It - The present invention relates to a core catcher and a corer having the same, and more particularly, to a core catcher provided with dual blade radial pins for preventing loss of sediments and a corer having the same. | 06-03-2010 |
20110083905 | Coring apparatus with sensors - A coring apparatus includes an outer core barrel associated with a drill bit and an inner core barrel adapted to accept a core sample. The inner core barrel is rotatable with respect to the outer core barrel via a rotatable bearing. The coring apparatus may include a rotation sensor located within the inner core barrel. The rotation sensor measures relative rotation between the inner core barrel and the outer core barrel. Alternatively the coring apparatus may include one or more strain sensors adapted to measure tension and/or compression experienced by the inner core barrel or a vibration sensor mounted on the inner core barrel. The vibration sensor measures vibration experienced by the inner barrel. | 04-14-2011 |
20140305712 | PRESSURE CORE BARREL FOR RETENTION OF CORE FLUIDS AND RELATED METHOD - A pressure coring apparatus comprises a housing having an upper end and a lower end. A valve is coupled to the lower end of the housing and has an open position for entrance of a core and a closed position for retaining and sealing the core within the housing. A piston assembly is moveably disposed within the housing. A first volume is defined within the housing and between the upper end of the housing and the piston assembly. A second volume is defined within the housing between the lower end of the housing and the piston assembly. A pressure relief device is disposed through the housing and operable to maintain pressure within the first volume and the second volume below a target pressure. | 10-16-2014 |