Abstract: A power swivel is disclosed that is configured to rotate tubular string and drill bit to form or extend a subterranean borehole. In an embodiment, the power swivel includes a motor, a gear box coupled to the motor, and a lubrication system coupled to the gear box. The lubrication system includes a pump disposed within the gear box, the pump including an outlet. In addition, the lubrication system includes a recirculation line fluidly coupled to the outlet of the pump. Further, the lubrication system includes a first injector fluidly coupled to the recirculation line. The injector is configured to deliver lubricant to one of a bearing and a gear disposed within the gear box.

Abstract: A purification column is provided in which fluid is purified by flow through a purifying component. The column includes an annular wall defining a bore which, in use, contains the purifying component. The column further includes an inlet port to the bore comprising a first aperture through the annular wall, the inlet port being adjacent one end of the column. The column further includes an outlet port from the bore comprising a second aperture through the annular wall, the outlet port being adjacent the same end of the column as the inlet port. The column further includes a flow guidance device within the bore and removably connected to the inlet and outlet ports for guiding the fluid to the purifying component from the inlet port and for guiding the fluid from the purifying component to the outlet port. The flow guidance device maintains separation of the fluid flows to and from the purifying component.

Abstract: Aspects of the present disclosure include a titration probe that mitigate the occurrences of titration probe clots. A bar such as segment of music wire, is extended across the tip of a titration probe and attached at both ends to the titration probe. The bar is configured to catch clots and prevent the clots from being collected along with a blood sample to be analyzed. The bar effectively reduces the cross sectional area of the titration probe tip.

Abstract: A purification column is provided in which fluid is purified by flow through a purifying component. The column includes an annular wall defining a bore which, in use, contains the purifying component. The column further includes an inlet port to the bore comprising a first aperture through the annular wall, the inlet port being adjacent one end of the column. The column further includes an outlet port from the bore comprising a second aperture through the annular wall, the outlet port being adjacent the same end of the column as the inlet port. The column further includes a flow guidance device within the bore and removably connected to the inlet and outlet ports for guiding the fluid to the purifying component from the inlet port and for guiding the fluid from the purifying component to the outlet port. The flow guidance device maintains separation of the fluid flows to and from the purifying component.

Abstract: A system for peak-to-average-power ratio (PAPR) reduction of a frequency shifted plurality of digital broadcast signals taking into account the combined signal peaks in order to transmit the signals more efficiently in a single broadcast transmission system. The PAPR algorithm takes into account a rotating constellation phase offset for the shifted signals corresponding to the amount of applied frequency shift. In the case of a dual sideband In-Band-On-Channel (IBOC) signal typically used in conjunction with an FM carrier in the center, the sidebands can be interleaved to create a new IBOC signal definition and take the place of the FM carrier for an all-digital transmission that is backward compatible with IBOC receivers allowing for a gradual migration to all digital broadcasting.

Abstract: A filter assembly for collecting material entrained in a fluid stream includes a filter element having a tubular filter and an end cap providing a flow conduit which extends between first and second conduit openings communicating with the internal void of the tubular filter. A housing for the filter element has inlet and outlet ports for the fluid stream, a housing bowl in which the tubular filter is located, and a housing head which provides at least one of the ports as a docking port for the first conduit opening. The housing head and end cap are arranged such that the end cap is inserted into the housing head, and then rotated relative to the housing head about an axis perpendicular to the axis of the tubular filter and to the axis of the first conduit.

Abstract: A washpipe assembly for a power swivel and a power swivel incorporating the washpipe assembly. In an embodiment, the washpipe assembly includes a washpipe including a central axis and a radially outermost cylindrical surface. In addition, the washpipe assembly includes a first packing assembly configured to be coupled to a stem of the power swivel. The first packing assembly includes a seal assembly that includes one or more annular seal members each including a body and a contact insert mounted to the body, the contact insert engaging and forming a dynamic seal with the radially outermost cylindrical surface of the washpipe.

Abstract: A purification column is provided in which fluid is purified by flow through a purifying component. The column includes an annular wall defining a bore which, in use, contains the purifying component. The column further includes an inlet port to the bore comprising a first aperture through the annular wall, the inlet port being adjacent one end of the column. The column further includes an outlet port from the bore comprising a second aperture through the annular wall, the outlet port being adjacent the same end of the column as the inlet port. The column further includes a flow guidance device within the bore and removably connected to the inlet and outlet ports for guiding the fluid to the purifying component from the inlet port and for guiding the fluid from the purifying component to the outlet port. The flow guidance device maintains separation of the fluid flows to and from the purifying component.

Abstract: An adjustable flow control device is provided which has a valve body containing a series of orifices of varying diameter and an indexable valve cover which includes at least one flow conduit which can be positioned and locked in a sealable manner over a chosen orifice while the remaining part of the valve cover closes off the other orifices of the valve body. Due to the device having fixed size orifices, each orifice will provide a fixed specific fluid flow rate for any predetermined pressure loss across the orifice. The device is suitable for use on all types of gas and liquid fluids.

Abstract: A banked purification system having, in flow series, an inlet for entry of a fluid, a bank of two or more purification columns in which the fluid is purified by a purifying component, and an outlet for discharging the purified fluid, the columns being arranged in parallel such that the fluid from the inlet splits at first ends of the columns into respective streams which flow through the columns and recombine at second ends of the columns for onward travel to the outlet; wherein the columns have first ports in the side walls of the columns at the first ends, the first ports being connected to each other such that the first ends are placed in fluid communication to create a manifold from the first ends of the columns which splits the fluid from the inlet into said streams.

Abstract: Alternative methods for the detection and measurement of proteases in biological samples and compounds which allow for such detection are required to allow for rapid and selective identification of these enzymes. Compounds which allow for selective identification of these enzymes are provided with assays and kits for their use.

Abstract: A method facilitating preparation of textiles and/or garments to facilitate use of a direct-to-garment (DTG) printing process to apply graphics to the garments is provided. The method includes the application of a pretreatment during a textile and/or garment-making process to obviate the need to apply pretreatment to a finished garment immediately before DTG printing.

Abstract: An adjustable flow control device is provided which has a valve body containing a series of orifices of varying diameter and an indexable valve cover which includes at least one flow conduit which can be positioned and locked in a sealable manner over a chosen orifice whilst the remaining part of the valve cover closes off the other orifices of the valve body. Due to the device having fixed size orifices, each orifice will provide a fixed specific fluid flow rate for any predetermined pressure loss across the orifice. The device is suitable for use on all types of gas and liquid fluids.

Abstract: A manifold head is provided for a column in which fluid is conditioned by flow through a conditioning component, the column including the manifold head and an elongate container for the conditioning component, in use the manifold head being sealingly assembled to an end of the container. The manifold head has an external wall, an inlet port for incoming flow of fluid into the column, an outlet port for outgoing flow of fluid out of the column, and an internal flow guidance formation for guiding the incoming flow to the conditioning component and for guiding the outgoing flow from the conditioning component. The flow guidance formation further maintains separation of the incoming and outgoing flows within the column en route to and from the conditioning component. The external wall and the internal flow guidance formation of the manifold head are constituent parts of a unitary extruded body section.

Abstract: A purification column is provided in which fluid is purified by flow through a purifying component. The column includes an annular wall defining a bore which, in use, contains the purifying component. The column further includes an inlet port to the bore comprising a first aperture through the annular wall, the inlet port being adjacent one end of the column. The column further includes an outlet port from the bore comprising a second aperture through the annular wall, the outlet port being adjacent the same end of the column as the inlet port. The column further includes a flow guidance device within the bore and removably connected to the inlet and outlet ports for guiding the fluid to the purifying component from the inlet port and for guiding the fluid from the purifying component to the outlet port. The flow guidance device maintains separation of the fluid flows to and from the purifying component.

Abstract: A method of reducing peak-to-average power in a hybrid signal is provided. The method determines peaks in power by defining a sample point by way of a digital vector and an analog vector. The digital and analog vectors are added together to generate a hybrid vector which is used to compare the sample point to the maximum desired peak threshold. An error vector is used to correct the sample point to a desired power level. Once the sample point has been corrected it can be added back to the analog signal and transmitted.

Abstract: A filter assembly for collecting material entrained in a fluid stream includes a filter element having a tubular filter and an end cap providing a flow conduit which extends between first and second conduit openings communicating with the internal void of the tubular filter. A housing for the filter element has inlet and outlet ports for the fluid stream, a housing bowl in which the tubular filter is located, and a housing head which provides at least one of the ports as a docking port for the first conduit opening.

Abstract: A method of producing a filter unit, such as an air/oil separator, having a tubular filter element bonded at one end to an end cap, is proposed. The method includes the steps of: providing a tubular filter element and an end cap; melting a portion of the end cap; and embedding an end of the filter element into the melted portion of the end cap. The melted portion, on cooling, solidifies to bond the tubular filter element to the end cap. The end cap can be formed of thermoplastic containing an electrically conductive filler. The end cap can be formed of a thermoplastic having a melting point of at least 180 C. The method may further include, after the embedding step, a step of forcing melted thermoplastic from the melted portion radially against a side wall of the tubular filter element.

Abstract: A banked purification system having, in flow series, an inlet for entry of a fluid, a bank of two or more purification columns in which the fluid is purified by a purifying component, and an outlet for discharging the purified fluid, the columns being arranged in parallel such that the fluid from the inlet splits at first ends of the columns into respective streams which flow through the columns and recombine at second ends of the columns for onward travel to the outlet; wherein the columns have first ports in the side walls of the columns at the first ends, the first ports being connected to each other such that the first ends are placed in fluid communication to create a manifold from the first ends of the columns which splits the fluid from the inlet into said streams.