Christie, GB
Andrew Robert Christie, Northampton GB
Patent application number | Description | Published |
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20100177015 | Antenna and an antenna feed structure - A dielectrically-loaded helical antenna has a cylindrical ceramic core bearing metallised helical antenna elements which are coupled to a coaxial feeder structure passing axially through the core. Secured to the end face of the core is an impedance matching section in the form of a laminate board. The matching section embodies a shunt capacitance and a series inductance. | 07-15-2010 |
20120032871 | Antenna and an antenna feed structure - A dielectrically-loaded helical antenna has a cylindrical ceramic core bearing metallised helical antenna elements which are coupled to a coaxial feeder structure passing axially through the core. Secured to the end face of the core is an impedance matching section in the form of a laminate board. The matching section embodies a shunt capacitance and a series inductance. | 02-09-2012 |
Andrew Robert Christie, Mawsley GB
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20130099999 | RADIOFREQUENCY CIRCUIT ASSEMBLY - This disclosure relates to a radiofrequency circuit assembly and a dielectrically-loaded antenna for use in the assembly. The antenna comprises a solid electrically insulative core having a passage therethrough extending from a first core surface portion to a second, oppositely facing core surface portion, and a printed circuit feeder structure secured in the core passage and having exposed antenna mounting projections at opposite respective ends of the passage. The printed circuit board mounting the antenna has a cut-out dimensioned to accommodate the antenna core with the passage extending substantially parallel to the plane of the board. The antenna mounting projections at both ends of the passage engage respective edge portions of the said printed circuit board adjacent the cut-out so that the antenna core is supported by the printed circuit board between spaced-apart mounting locations adjacent the oppositely facing core surface portions. | 04-25-2013 |
20130135169 | ANTENNA - This application relates to antennas including, for example, an antenna for operation at a frequency in excess of 200 MHz comprising: an insulative substrate having a central axis, an axial passage extending therethrough and an outer substrate surface which extends around the axis; a three-dimensional antenna element structure including at least one pair of axially coextensive elongate conductive antenna elements on or adjacent the outer substrate surface; and an axial feeder structure which extends through the passage and comprises an elongate laminate board wherein the laminate board proximal end portion includes lateral extensions projecting in opposite lateral directions, and wherein, adjacent the laminate board proximal end portion, the substrate has recesses on opposite sides of the axis which receive at least edge parts of the said lateral extensions of the laminate board proximal end portion. | 05-30-2013 |
20130181881 | ANTENNA ASSEMBLY - Among the embodiments disclosed herein is an antenna assembly comprising the combination of a dielectrically loaded antenna and a housing, the housing incorporating a connector for coupling the antenna to host equipment. The antenna comprises an insulative core which has an outer surface and is shaped to define a central axis, and a laminate board on the central axis, the laminate board extending proximally from a proximal core surface portion oriented transversely with respect to the axis. The housing comprises a housing body which forms a hollow conductive shield for the laminate board, and is centred on the antenna axis, and the housing is shaped to provide a mounting surface which, in a cross-sectional plane perpendicular to the axis, defines a periphery of an area in the said plane which area is at least as great as the cross-sectional area of the said proximal portion of the antenna. | 07-18-2013 |
20140015726 | RADIOFREQUENCY CIRCUIT ASSEMBLY - Disclosed herein are embodiments of a radiofrequency circuit assemblies and dielectrically-loaded antennas for use in the assembly, the assembly and the antenna being for operation at a frequency in excess of 200 MHz. The disclosed assemblies and antennas should not be construed as limiting in any way. Instead, the present disclosure is directed toward all novel and nonobvious features and aspects of the various disclosed embodiments, alone and in various combinations and subcombinations with one another. | 01-16-2014 |
Andrew Robert Christie, Northhamptonshire GB
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20110221650 | Dielectrically Loaded Antenna and Radio Communication Apparatus - A backfire dielectrically loaded antenna for operation at a frequency in excess of 200 MHz includes a dielectric core having a relative dielectric constant greater than 5 and having an outer surface defining an interior volume the major part of which is occupied by solid material of the core; a three-dimensional antenna element structure including at least one pair of elongate conductive antenna elements disposed on or adjacent the side surface portion of the core and extending from a distal core surface portion towards a proximal core surface portion; a feed structure having an axially extending elongate laminate board including a transmission line section acting as a feed line which extends through a passage in the core from the distal core surface portion to the proximal core surface portion, and an antenna connection section having an integrally formed proximal extension of the transmission line section the width of which, in the plane of the laminate board, is greater than the width of the passage; and an impedance matching section coupling the antenna elements to the feed line. | 09-15-2011 |
20110221651 | Dielectrically Loaded Antenna and Radio Communication Apparatus - A radio communication apparatus including: (a) a backfire dielectrically loaded antenna for operation at a frequency in excess of 200 MHz comprising: an electrically insulative dielectric core of a solid material having a relative dielectric constant greater than 5 and having an outer surface including oppositely directed distal and proximal surface portions extending transversely of an axis of the antenna and a side surface portion extending between the transversely extending surface portions, the core outer surface defining an interior volume the major part of which is occupied by the solid material of the core; a three-dimensional antenna element structure including at least one pair of elongate conductive antenna elements disposed on or adjacent the side surface portion of the core and extending from the distal core surface portion towards the proximal core surface portion; a feed structure in the form of an axially extending elongate laminate board comprising at least a transmission line section acting as a feed line which extends through a passage in the core from the distal core surface portion to the proximal core surface portion, the antenna having exposed contact areas on or adjacent the core proximal surface portion; and (b) radio communication circuit means having an equipment laminate circuit board with at least one conductive layer, the conductive layer or layers having a plurality of contact terminal support areas to each of which is conductively bonded a respective spring contact positioned so as to bear resiliently against respective ones of the exposed contact areas of the antenna. | 09-15-2011 |
Arlane Christie, Balmedie GB
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20130168104 | METAL-TO-METAL SEALING ARRANGEMENT FOR CONTROL LINE AND METHOD OF USING SAME - A well completion system includes a wellhead, a control line assembly for use in completions that is mounted to the wellhead, and a tubing hanger. The control line assembly includes a cylinder, a main housing assembly, a passage and a metal-to-metal seal. A split lockout ring provides a positive lock to the passage. Control lines enter the tubing hanger and exit via the wellhead. This arrangement on the wellhead provides sufficient height and clearance to allow for the installation of a plurality of control lines. | 07-04-2013 |
Arlane P. Christie, Balmadie GB
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20110005774 | SINGLE TRIP, TENSION SET, METAL-TO-METAL SEALING, INTERNAL LOCKDOWN TUBING HANGER - A system, apparatus, and method to apply tension to completion tubing in a wellbore. The system, apparatus, and method comprises an inner and outer tubing hanger, with the string of tubing attached to the inner tubing hanger. A running tool lands the outer tubing hanger on a landing shoulder and continues to lower the inner tubing hanger into the wellbore until the lower end of the inner tubing hanger latches into a retaining device. The running tool then sets a seal which holds the outer tubing hanger in position and causes a ratcheting mechanism to move to an engaged position. The running tool then withdraws the inner tubing hanger a predetermined distance until the inner tubing hanger engages the ratcheting mechanism. | 01-13-2011 |
Arlane Petrie Christie, Aberdeen GB
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20150330169 | Enhanced Wellhead Clamp Type Hub Connection - An apparatus for connecting an upper wellhead member to a lower wellhead member includes a box connector. The box connector has an upper portion that selectively circumscribes the upper wellhead member and a lower portion that selectively circumscribes the lower wellhead member. An adapter plate assembly having an upper adapter ring selectively engages a hub profile of the lower wellhead member, and a separate lower adapter ring selectively engages a generally opposite facing lower hub profile of the lower wellhead member. A plurality of locking dog assemblies drive the adapter plate assembly into engagement with the hub profile and the lower hub profile, the locking dog assemblies being spaced around the box connector. | 11-19-2015 |
20150345243 | Fluid Line Exit Block With Dual Metal-to-Metal Sealing - A termination block assembly for fluidly coupling a fluid line at a hydrocarbon production device includes a fluid line block with an inner surface selectively mated to a corresponding surface of the hydrocarbon production device. The fluid line block has a protruding member extending from the inner surface. A primary seal is located at an end of the protruding member. The primary seal has an inner diameter selectively circumscribing the fluid line extending from the hydrocarbon production device, and an outer diameter selectively engaging a sidewall passage surface of the hydrocarbon production device and sealing between the fluid line block and the hydrocarbon production device. A secondary seal circumscribes the protruding member, engaging both the inner surface of the fluid line block and the corresponding surface of the hydrocarbon production device and sealing between the fluid line block and the hydrocarbon production device. | 12-03-2015 |
Arlane Petrie Christie, Balmedie GB
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20140151024 | Packoff Sealing Assembly - A packoff assembly for sealing a space between an inner well member and an outer well member. The packoff assembly has a packoff body, and a sealing mechanism with a U-shaped cross-section, including a packoff body leg and a well component leg extending substantially downward from a transverse connecting section. The well component leg is elastically bendable so that it resists inward deflection toward the packoff body and so that the sealing mechanism can be set without the use of an energizing ring. The packoff body leg is configured for engagement with the packoff body, and the well component leg has a sealing surface configured for sealing engagement with the inner or the outer well member. | 06-05-2014 |
David Christie, West Sussex GB
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20090141706 | SYSTEM AND METHOD FOR THE AUTOMATIC PROVISIONING OF AN OPENLINE CIRCUIT - A system and method for the automatic provisioning of an openline circuit, specifically for use with a network management system, the system comprising a web GUI (Graphical User Interface) and middleware, wherein the middleware may be synchronized with and instructs a prior art network management system is disclosed. The GUI can be accessed by personnel in an IT department, or by dealers over the Internet via their dealer board using “secure sockets” to be able to make the changes to their openline circuits, including the provisioning of a new openline circuit, the various different inputs being processed by the middleware. The middleware manipulates many SQL (Structured Query Language) databases and is adaptable to work with any network management platform and further is able to provide billing information. | 06-04-2009 |
David S. Christie, Aberdeen GB
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20080245529 | Through-Riser Installation of Tree Block - A subsea well assembly has a tubing hanger that lands and seals in a wellhead housing. A tree block is lowered through the drilling riser into engagement with the tubing hanger. The tree block has a lower portion that inserts and latches into the bore of the wellhead housing. The drilling riser is disconnected, and a module is lowered onto the tree block, the module having a choke and controls for controlling the well. The master valve for production is the downhole safety valve in the tubing. The wing production valve is a ball valve located in the flow passage of the tree block. | 10-09-2008 |
20090255682 | Large Bore Vertical Tree - A subsea wellhead assembly that includes a wellhead housing, a production tree, a tubing hanger adapted to land in the wellhead assembly inside the wellhead housing, and a bore formed through the production tree having an inner diameter greater than the tubing hanger outer diameter. A hanger adapter may be included having an annular body disposed on the tubing hanger upper surface and a flange member projecting radially outward from the annular body. | 10-15-2009 |
20100078176 | Combined Tree Stab and Control Interface - A subsea wellhead assembly provided over a wellbore, the assembly having a wellhead housing, a tubing hanger in the housing, a production tree on the wellhead housing above the tubing hanger, and a control circuit that passes axially downward from the production tree and through the tubing hanger. A tree stab assembly may be included that is set between the tubing hanger and production tree. The wellhead assembly can also include a casing hanger landed in the housing, casing attached to the casing hanger, and tubing attached to the tubing hanger. | 04-01-2010 |
David Stewart Christie, Aberdeen GB
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20130327534 | Light Well Intervention Umbilical and Flying Lead Management System and Related Methods - Systems and methods for managing umbilical lines and one or more jumpers are provided. An example of a system includes a deployment platform carrying a winch and spool assembly, a tether management assembly, and an integrated electrical and/or hydraulic umbilical line extending between a spool on the winch and spool assembly and the tether management assembly. The winch and spool assembly is configured to deploy and to support the umbilical line. The tether management assembly includes a winch and spool assembly for deploying a flying lead and/or annulus jumper adapted to connect to an emergency disconnect package of a well control package for a well. A set of buoyant modules are connected to or integral with a portion of the umbilical line to be used to form an artificial heave compensation loop. | 12-12-2013 |
Graham Christie, Cambridge GB
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20100021936 | Sensor for Spores - A sensor for spores, comprises spore-binding ligands and, on or within the body of the sensor, a material that is responsive to Ca-DPA (calcium-dipicolinic acid) but not to a (or another) germinant. | 01-28-2010 |
Mark Christie, London GB
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20160042075 | Content Delivery And Display System - The invention relates to a content delivery server configured to select from multiple content items a set of content items for display to a user at a user terminal, the content delivery server having access to content identifiers, identifying content items for delivery; a processor operating a content selection program which is arranged to receive the context data for different contexts and to select a set of content items in dependence on the context data, wherein the content items in the set vary with the context data, such that the content of items in a first set for a user in a first context are different from the content of items in a second set for the same user in a second context, and to transmit a recommendation message to the user terminal comprising a set of content identifiers. | 02-11-2016 |
Mark Ian Christie, Newmarket GB
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20090191200 | Method for the Treatment of Multiple Sclerosis by Inhibiting IL-17 Activity - The present invention provides a method for the treatment and/or prophylaxis of multiple sclerosis (MS) comprising administering a therapeutically effective amount of an inhibitor of IL-17 activity. | 07-30-2009 |
Michael John Christie, Aberdeen GB
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20100071896 | Downhole apparatus and method - A downhole apparatus adapted to be run on a workstring in a well bore. The apparatus has a body including ports and a valve which is rotatable to open and close the ports to selectively allow fluid flow through the body between regions of a well bore above and below the apparatus. The valve is rotated via a gearbox and motor in the apparatus. A sealing arrangement between the valve and body is also described. A method of running the apparatus in a well bore and monitoring pressure above the apparatus in order to control opening and closing of the valve under predetermined conditions is presented. | 03-25-2010 |
20140034299 | Downhole Apparatus Having a Rotating Valve Member - A downhole apparatus ( | 02-06-2014 |
Paul J.h. Christie, Aberdeenshire GB
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20120118085 | System and Device for Monitoring a Movable Plug Element(s) in a Pipeline - A friction pig | 05-17-2012 |
Philip Christie, Cambridgeshire GB
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20090213691 | SOURCE SIGNATURE DECONVOLUTION METHOD - A method of filtering seismic signals is described using the steps of obtaining the seismic signals generated by activating a seismic source and recording signals emanating from the source at one or more receivers; defining a source signature deconvolution filter to filter the seismic signal, wherein the filter is scaled by a frequency-dependent term based on an estimate of the signal-to-noise (S/N) based on the spectral power of a signal common to a suite of angle-dependent far-field signatures normalized by the total spectral power of the signatures within the angular suite and performing a source signature deconvolution using the source signature deconvolution filter. | 08-27-2009 |
20100329078 | INTERPOLATION AND/OR EXTRAPOLATION OF SEISMIC DATA - A method of processing seismic data is provided in the seismic data is acquired at a plurality of locations and the method comprises interpolating and/or extrapolating the seismic data, thereby to estimate seismic data at a target location different from the plurality of locations. The interpolating and/or extrapolating the seismic data is performed in a polar co-ordinate system. The method may provide for, among other things, accuracy of estimation; particularly at short offsets from the seismic source. The polar co-ordinate system used may be chosen to approximate the seismic wavefront in an earth model, for example in an earth model in which properties vary only with depth. | 12-30-2010 |
Philip A.f. Christie, Fen Drayton GB
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20120002504 | GRAVITY MEASUREMENTS IN MARINE, LAND AND/OR SEABED SEISMIC APPLICATIONS - A technique facilitates collection and use of data on subterranean formations. The technique comprises creating a distributed sensor network having multiple sensors arranged in a desired pattern. The distributed sensor network is employed to collect seismic data from the multiple sensors. Additionally, the distributed network and sensors are designed to collect gravity data from the multiple sensors. The sensors may be arranged in a variety of environments, including land-based environments and seabed environments. | 01-05-2012 |
20130182536 | WAVEFIELD DEGHOSTING - A technique includes receiving sensor acquired data, which includes pressure data representative of at least one pressure measurement of a wavefield and particle motion data representative of at least one particle motion measurement of the wavefield. The technique includes filtering the pressure data and the particle motion data with a plurality of directional filters to provide a plurality of filtered datasets. The filtered datasets are associated with different directional ranges. The technique includes estimating an angle of incidence for at least one of the directional ranges based at least in part on at least one of the filtered datasets; and processing the acquired data to determine at least one of an upgoing component of the wavefield and a downgoing component of the wavefield based at least in part on the at least one estimated angle of incidence. | 07-18-2013 |
Philip A. F. Christie, Fen Drayton GB
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20110292762 | Deghosting Seismic Data - A technique includes receiving seismic data acquired by seismic sensors; and processing the seismic data on a machine to deghost the data. The processing includes deghosting the seismic data using a first deghosting technique that relies on a ghost model; deghosting the seismic data using a second deghosting technique that is independent from any modeling of the ghost; and selectively combining the results of the deghosting using the first and second deghosting techniques. | 12-01-2011 |
20130135965 | SEPARATION OF SIMULTANEOUS SOURCE DATA - Generating an image of an interior of the Earth from a seismic survey using multiple sources. The multiple sources may be fired simultaneously and the data received by seismic sensors in the seismic survey may be decomposed so that seismic data generated by each of the multiple sources may be determined. Decomposing of the received data may be performed using frequency diverse basis functions and converting the data separation problem into an optimization problem, which can be a one-norm or zero-norm optimization problem in frequency-space domain. The decomposed data may be used to generate the image of the Earth's interior. | 05-30-2013 |
20140022863 | INTERPOLATION AND/OR EXTRAPOLATION OF SEISMIC DATA - A method of processing seismic data is provided in the seismic data is acquired at a plurality of locations and the method comprises interpolating and/or extrapolating the seismic data, thereby to estimate seismic data at a target location different from the plurality of locations. The interpolating and/or extrapolating the seismic data is performed in a polar co-ordinate system. The method may provide for, among other things, accuracy of estimation; particularly at short offsets from the seismic source. The polar co-ordinate system used may be chosen to approximate the seismic wavefront in an earth model, for example in an earth model in which properties vary only with depth. | 01-23-2014 |
20140200854 | METHODS AND COMPUTING SYSTEMS FOR SURVEY DESIGN AND MODELING WORKFLOW FOR TOWED MULTIMEASUREMENT SEISMIC STREAMER DATA - Modular workflows for determining acquisition geometry and efficiency using 3D deghosting and wavefield reconstruction methods enabled by multicomponent seismic information are disclosed, which may be performed as methods. In some embodiments, such methods may be performed on computing systems. | 07-17-2014 |
20150066374 | SEISMIC DATA PROCESSING WITH FREQUENCY DIVERSE DE-ALIASING FILTERING - Performing seismic data processing using frequency diverse basis functions and converting a data processing problem into a one-norm or zero-norm optimization problem, which can be solved in frequency-space domain. The data processing problems can be data deghosting, data regularization or interpolation. The data being processed can be aliased or un-aliased, single sensor data or group-formed data, single component or multi-component data single source data or simultaneous sources, or some combinations. | 03-05-2015 |
Philip A. F. Christie, Cambridgeshire GB
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20110211423 | Gravity Measurements Using Seismic Streamers - A technique facilitates collection and use of data on subterranean formations. The technique comprises obtaining gravity measurements through the use of seismic streamers. At least one streamer is provided such that each streamer has multiple sensors, e.g. accelerometers. The at least one streamer is towed with a tow vessel, and gravity data are accumulated via the multiple sensors during towing. | 09-01-2011 |
20130343157 | Neutrally-Buoyant Borehole Investigation Tools and Methods - The disclosure provides neutrally-buoyant tools for seismic data collection. The tools may range from several hundred meters to several kilometers in length and have integrated sensors which move along with the borehole fluid in response to a passing seismic wave. The disclosure also provides methods of deploying neutrally-buoyant tools, which includes using a tractor, adding a weight or both to the tool in order to overcome the difficulty of lowering a neutrally buoyant tool into a borehole, and optionally occasionally clamping the tool to the borehole to alleviate tension in the tool. This disclosure also provides methods of acquiring seismic data, which involves positioning a neutrally-buoyant tool in a borehole such that the tool is able to move relatively freely along with the borehole fluid in response to a seismic wave passing through the fluid, firing a seismic source, and using the sensors to collect seismic data generated thereby. | 12-26-2013 |
20130343158 | Borehole Seismic Acquisition Tools, Systems and Methods - A tool is described for seismic data collection which may have sensors mounted along its entire length to sample both geophysical signal and noise including at least one of acoustic noise, system noise, and noise resulting from the interaction between the two. Systems and methods for acquiring borehole seismic data are also described. In contrast to conventional systems which attempt to avoid introducing noise into the collected data stream, the present systems include a sufficient type, number, and spacing of sensors to intentionally sample at least one source of noise. The methods include operating a borehole seismic acquisition system to sample both a target signal and at least one source of noise and using a processor with machine-readable instructions for separating the noise from the signal. | 12-26-2013 |
Philip Andrew Felton Christie, Cambridgeshire GB
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20080291779 | Marine Seismic Acquisition System - A marine cable for seismic surveys is described with a plurality of ceramic pressure sensors ( | 11-27-2008 |
20110063946 | MARINE SEISMIC ACQUISITION SYSTEM - A marine cable for seismic surveys is described with a plurality of ceramic pressure sensors arranged in groups of at least two pressure sensors with a group output being representative of the vertical pressure gradient at the group location, and an inclinometric system including one or more transducers for determining the orientation of the sensors of the group in order to determine their true vertical separation. | 03-17-2011 |
Robert D. Christie, Fife GB
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20150288304 | Electric Motor Drive Isolation Circuit - An isolation circuit is coupled between motor driver half bridge circuits and an electric motor. A motor controller circuit supplies motor drive signals to the motor driver half bridge circuits. The isolation circuit includes transistors coupled in series with the motor windings. Low to medium power diodes are coupled between a reference voltage source and control terminals of the transistors. | 10-08-2015 |
20150311894 | Systems and Methods for Sensing Current Through a Low-Side Field Effect Transistor - Systems and techniques detecting a reverse current are disclosed. An apparatus comprises a switching circuit coupled to a load and a reference node. The switching circuit may be capable of conducting a reverse current from the reference node to the load when a voltage at the load is lower than a voltage at the reference node. A voltage source has a first terminal coupled to the load, a second terminal configured to follow a voltage at the load, and produces a voltage proportional to a voltage drop across the switching circuit. A comparator circuit is coupled to compare a voltage at the second terminal of the voltage source to the voltage at the reference node and configured to indicate when the reverse current has a magnitude greater than a predetermined threshold. | 10-29-2015 |
Robert Douglas Christie, Dalgety Bay GB
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20130314836 | Transistor Overcurrent Detection - Circuits and methods for overcurrent fault detection using a debounce timer to qualify the presence of an overcurrent fault based on an overcurrent signal being asserted for at least a predetermined time interval. The debounce timer may be used in conjunction with state-qualified fault sensing and/or blank-time-qualified fault sensing. | 11-28-2013 |
Robert M. Christie, Galashiels GB
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20130167308 | Method of Printing - The invention provides a method of printing a textile comprising polyester, or a full-chrome, semi-chrome or vegetable-tanned leather, with a vat or a sulfur dye, comprising inkjet printing a solubilised vat dye or a solubilised sulfur dye onto the textile or the leather. | 07-04-2013 |
Stewart Christie, Aberdeen GB
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20100300703 | PRESSURE ACTUABLE DOWNHOLE TOOL AND A METHOD FOR ACTUATING THE SAME - Pressure actuable downhole tool such as a packer and a method for actuating the same typically uses a control line to trigger a configuration change in the tool in which a communication line is opened between the throughbore of the tool and a pressure responsive actuator, allowing the pressure responsive actuator to be set by downhole fluid pressure applied via the throughbore. Thus the pressure from the control line is used to trigger actuation of the tool, but the throughbore pressure is used to set the tool. The advantage of this activation mechanism is that the tool can be set even when pressure supplied by the control line is insufficient to fully actuate or set the tool, and in certain embodiments, the tool can be set using much higher tubing pressure than could be supplied through the control line, thereby allowing more reliable and instantaneous setting than tools set using control line pressure alone. | 12-02-2010 |
20110057395 | SEAL ELEMENT - A seal element ( | 03-10-2011 |
20120103622 | EFFICIENT OPEN WATER RISER DEPLOYMENT - A riser for use in subsea operations that is parked subsea deployed as needed onto wellheads disposed proximate where the riser is parked. A base anchored into the seafloor provides a pedestal for parking the riser. The riser emits a beacon signal so it can be located when needed. When parked, the riser can be kept in a vertical orientation by a buoyancy module mounted on an upper portion of the riser. A workboat, or other vessel, attaches to the parked riser and positions it onto a designated wellhead. An extension connects the riser to platform or other vessel above the sea surface. | 05-03-2012 |
20150053395 | Seal Element - A seal element for sealing a conduit is described. The seal element comprises a frusto conical portion and a first lip extending from an external edge of the frusto conical portion, the lip being adapted to be pivoted into engagement with a conduit surface. In a described embodiment, two seal elements are provided on a plug for sealing a conduit, the seal elements facing in opposite directions to seal from above and below. | 02-26-2015 |