Patent application number | Description | Published |
20110187936 | MULTIPLE REDUCED-BANDWIDTH PROCESSING CHAINS TO ACHIEVE A FULL AND CONTINUOUS OUTPUT BAND FOR MULTIPLE CHANNEL CATV UPCONVERSION - A method of channel processing is provided wherein multiple reduced-bandwidth “processing blocks” may be combined at RF to allow for the continuous and flexible placement of multiple-channels across the full or partial CATV output band. Each reduced-bandwidth processing block is associated with a fixed-frequency upconversion. In order to allow for continuous agile channel placement, the processing blocks overlap one another in frequency at RF. In the case where it is not necessary that the full CATV band be available to the output, the number of required processing blocks and upconversion chains is reduced and individual processing blocks and upconversion chains may be used to cover multiple non-contiguous frequency bands. | 08-04-2011 |
20110188584 | DIGITAL LOAD-SHARING TO ENHANCE THE REDUNDANCY AND FLEXIBILITY OF CHANNEL DISTRIBUTION IN A MULTIPLE-CHANNEL MULTIPLE-PORT CATV UPCONVERTER/MODULATOR - A method of channel-to-port assignment is described where the distribution of channels is performed in the digital domain of the CATV/QAM upconverter/modulator. This channel distribution allows for the possibility of simple failover, power combining of multiple outputs, and a fine granularity of channel to port mapping, QAM or analog channel, in a multi-port device. | 08-04-2011 |
20110191815 | AGILE DISTORTION AND NOISE CANCELLATION ACROSS MULTIPLE CHANNELS AND PORTS IN A CATV UPCONVERTER/MODULATOR - A distortion-cancellation method for analog CATV or QAM transmission over cable is provided wherein a single feedback path from the output of a multiple-channel multiple-port upconverter/modulator is down-converted and used to reduce or cancel undesirable noise components including LO leakage, spurious, and modulated noise. The method allows for real-time monitoring, tuning, or control of the CATV/QAM output and of interfering signals and aging effects as compared to a desired performance metric. | 08-04-2011 |
20120246673 | Apparatus for Insertion of Local Signals into a CATV Output - Apparatus for switching and combining based on external signaling is provided wherein a locally generated modulated carrier (or carriers) is inserted into a CATV system between the cable head end and video decoding/rendering device without requiring unused channels or the loss of any incoming services. An RF switch is controlled by a switch control processor based on knowledge of the video decoding/rendering device current tuning requirements to select between the full spectrum coming from the CATV system the locally generated and inserted channel. Current tuning requirements for the attached video decoding/rendering device may be input to the switch control processor from the video decoding/rendering device itself or from a separate device with knowledge of the current service requirements. | 09-27-2012 |
Patent application number | Description | Published |
20080196903 | Shoe for Wellbore Iining Tubing - This invention relates to a shoe for wellbore lining tubing and to a method of locating wellbore lining tubing in a wellbore. In one embodiment, a shoe ( | 08-21-2008 |
20080236841 | Downhole Swivel Sub - A swivel sub for connection in a work string between a workstring and a downhole apparatus is disclosed. The sub has a first substantially cylindrical body, including a sleeve portion having one or more teeth and a second substantially cylindrical body being partially located within the sleeve portion. The bodies are arranged to rotate relative to each other. A sliding sleeve, having one or more teeth arranged mutually engage with the first teeth is axially moveable between disengaged and engaged positions, in one embodiment by a pressure differential being created in the sub. Methods of running the tool are described, with particular application to setting and hanging of liners and screens. The invention also offers advantages for drilling applications. | 10-02-2008 |
20100065281 | SHOE FOR WELLBORE LINING TUBING - The present invention relates to a shoe for wellbore lining tubing and to a method of locating wellbore lining tubing in a wellbore. In particular, but not exclusively, the present invention relates to a shoe for wellbore lining tubing having an improved fluid flow diverter assembly for controlling circulation of fluid in the wellbore. | 03-18-2010 |
20100270018 | FISHING TOOL - A packer tool ( | 10-28-2010 |
20120125689 | Drill Pipe Tubing and Casing Protector - An assembly and method for protecting a pipe string movable within a wellbore. A generally annular body ( | 05-24-2012 |
20120234559 | DOWNHOLE SWIVEL SUB - The present invention provides a swivel sub for connection in a work string between a workstring and a downhole apparatus. The swivel sub includes a first substantially cylindrical body, including a sleeve portion having one or more teeth and a second substantially cylindrical body being partially located within the sleeve portion. The bodies are arranged to rotate relative to each other. The swivel sub also includes a sliding sleeve, having one or more teeth arranged mutually engage with the first teeth is axially moveable between disengaged and engaged positions, in one embodiment by a pressure differential being created in the sub. Further, the present invention provides methods for of running the tool, with particular application to setting and hanging of liners and screens. | 09-20-2012 |
20120285222 | APPARATUS AND METHOD FOR TESTING FLOAT EQUIPMENT - Apparatus and method for testing float equipment used in the construction of wellbores for the hydrocarbon exploration and production industry. The apparatus has a housing and an opening for receiving an item of float equipment. A seal arrangement is configured to seal with the item of float equipment, such that the housing and seal arrangement together define a test chamber. The test chamber is pressurised to expose at least a part of the item of float equipment in the test chamber to a test pressure. In embodiments of the invention, at least a part of an outside surface and at least a part of the item of float equipment may be simultaneously loaded. The tests performed more closely simulate the conditions to which the equipment is exposed in a wellbore. | 11-15-2012 |