Abstract: A separator for separating constituents of well fluid produced by a well is provided. The separator includes a vessel for receiving well fluid such that a first fluid constituent overlies a second fluid constituent within the vessel, a collection pipe having an opening for collecting a first fluid constituent from the vessel, and a positioner connected to the collection pipe for rotating the collection pipe about an axis to adjust a height of the opening within well fluid in the vessel. A method and system are also provided.

Abstract: A molecularly imprinted polymer comprises at least one recognition site that is complementary to a template molecule consisting of an amino acid sequence corresponding to a subsequence of the receptor binding domain of SARS-CoV-2 spike protein, wherein the amino acid sequence is no more than 50 amino acids in length and comprises a sequence selected from (i) NSNNLDSKVGG, (ii) NYNYLYRLFRKS, (iii) YRLFRKSNLKPF, (iv) STEIYQAGSTPC, (v) CNGVEGFNCYF, (vi) GSTPCNGVEGF, (vii) CYFPLQSYGFQP, (viii) GFQPTNGVGYQ and (ix) LQSYGFQPTNG. A method of preparing the molecularly imprinted polymer is also provided. Conjugates comprising the molecularly imprinted polymer and a fluorophore are also provided as are compositions containing the molecularly imprinted polymer and conjugates of the invention. The molecularly imprinted polymer, conjugate and compositions can be used in the detection of SARS-CoV-2.

Abstract: An apparatus for fitting to a wellbore, the apparatus including: a self-propelled downhole tool for deployment within the wellbore, and configured to propel itself along at least part of a length of the wellbore; and a lubricator for fitting to a wellhead of the wellbore via a valve system providing communication between the lubricator and the wellbore, and for housing the self-propelled downhole tool when in a stowed position, wherein the lubricator includes an input port for receiving data from a remote unit, the input port being in electrical communication with the self-propelled downhole tool when in the stowed position, and wherein the received data includes instructions for operating the self-propelled downhole tool, and associated self-propelled downhole tool, lubricator and method.

Abstract: A separator for separating constituents of well fluid produced by a well is provided. The separator includes a vessel for receiving well fluid such that a first fluid constituent overlies a second fluid constituent within the vessel, a collection pipe having an opening for collecting a first fluid constituent from the vessel, and a positioner connected to the collection pipe for rotating the collection pipe about an axis to adjust a height of the opening within well fluid in the vessel. A method and system are also provided.

Abstract: An assay method and device can perform at least one (e.g., at least two) assays on a single aliquot of a sample liquid. The device can mix a sample liquid with assay reagents including magnetically susceptible particles. The device is configured to create a sample liquid-air interface with the sample liquid. The magnetically susceptible particles can be located (via an applied magnetic field) at the liquid-air interface when a second liquid contacts the interface to form a liquid-liquid interface. The magnetic particles travel across the liquid:liquid interface to the second liquid. The magnetically susceptible particles are configured to transport an analyte across the interface into the second liquid. An assay for the analyte is performed in the second liquid. An assay for another analyte can also be performed in the sample liquid.

Abstract: A method of determining the presence or amount of analyte in a fluid sample, which comprises: contacting a fluid sample with a binding reagent that comprises a plurality of cleavable species and wherein said species, when cleaved, are detectable using electrochemical means; separating any binding reagent-analyte complex that forms from the unbound binding reagent; cleaving the cleavable species from the immobilized binding reagent-analyte complex; and detecting the cleaved species using electrochemical means.

Abstract: This invention relates to methods and apparatus for detecting the presence of analyte in a sample, in particular to luminescence-based methods for such detection.