Abstract: A pulse generator comprising: a first signal generating arm comprising a first inductor and a plurality of switching elements, each arranged to draw current through the first inductor; and a controller arranged to activate the plurality of switching elements in a predetermined sequence so as to generate a predetermined pulse waveform at a pulse generator output. The switching elements of the signal generating arm and the inductor together form a pulse synthesizer that takes the signal from the controller and uses it to synthesize an output pulse. Compared with conventional transmitter architectures, the functions of the upconversion mixer, the DAC, and the power amplifier are all performed by a single simplified circuit. This is both area efficient and power efficient.

Abstract: A packer assembly for use in a subterranean well can include a seal element which swells in the well, a reinforcement in the seal element, and an extrusion barrier which displaces outward in response to swelling of an end portion of the seal element, the reinforcement being longitudinally spaced apart from the end portion of the seal element. A method of constructing a packer assembly can include positioning a reinforcement in a seal element which swells in response to contact with a fluid, the positioning including longitudinally spacing opposite ends of the reinforcement away from opposite end portions of the seal element, and installing extrusion barriers which radially outwardly overlie the seal element end portions.

Abstract: A collecting device for displacement in a tubing. The collecting device is extended in shape with a longitudinal axis and forms a leading portion with an entrance and an end portion. The device includes a wall extending from the leading portion to the end portion, a collecting chamber formed inside a portion of the wall, a filter positioned with the collecting chamber, a motor, a pump, and an outlet at the end portion, where the filter stocking provided with an open first end portion and a closed second end portion, and the open first end portion faces the leading portion, a and the filter stocking forms a receptacle. A method for emptying the collecting device is described.

Abstract: An expansion tool and method for expanding a tubing is disclosed. The expansion tool includes a rear portion, an opposite leading end and an expansion piston within the expansion tool. The expansion piston includes an expansion cone and radially movable expansion elements forming a circumferential expansion body. The rear portion is adapted for engaging a power source positioned at the rear portion. The expansion tool further includes a plurality of expansion arms surrounding the expansion piston. Each expansion arm is on an outer side provided with an expansion element, and a wedge portion between the expansion element and the expansion cone. The wedge portion abuts the expansion cone.

Abstract: An expansion tool and method for expanding a tubing is disclosed. The expansion tool includes a rear portion, an opposite leading end and an expansion piston within the expansion tool. The expansion piston includes an expansion cone and radially movable expansion elements forming a circumferential expansion body. The rear portion is adapted for engaging a power source positioned at the rear portion. The expansion tool further includes a plurality of expansion arms surrounding the expansion piston. Each expansion arm is on an outer side provided with an expansion element, and a wedge portion between the expansion element and the expansion cone. The wedge portion abuts the expansion cone.

Abstract: A well packer can include a seal element adapted to extend continuously about a tubular, the seal element including a swellable material, and multiple longitudinally extending cement flow channels formed on an exterior of the seal element. A method of constructing a well packer for use in cementing a tubular in a wellbore can include forming a seal element having multiple longitudinally extending cement flow channels on an exterior thereof, the seal element including a swellable material, and positioning the seal element on the tubular, the seal element extending continuously about the tubular. A method of cementing a tubular in a wellbore can include flowing cement through an annulus between the tubular string and the wellbore, the flowing including flowing the cement through multiple longitudinally extending cement flow channels on a seal element which continuously encircles the tubular, and swelling a swellable material of the seal element.

Abstract: A packer assembly for use in a subterranean well can include a seal element which swells in the well, a reinforcement in the seal element, and an extrusion barrier which displaces outward in response to swelling of an end portion of the seal element, the reinforcement being longitudinally spaced apart from the end portion of the seal element. A method of constructing a packer assembly can include positioning a reinforcement in a seal element which swells in response to contact with a fluid, the positioning including longitudinally spacing opposite ends of the reinforcement away from opposite end portions of the seal element, and installing extrusion barriers which radially outwardly overlie the seal element end portions.

Abstract: A collecting device for displacement in a tubing. The collecting device is extended in shape with a longitudinal axis and forms a leading portion with an entrance and an end portion. The device includes a wall extending from the leading portion to the end portion, a collecting chamber formed inside a portion of the wall, a filter positioned with the collecting chamber, a motor, a pump, and an outlet at the end portion, where the filter stocking provided with an open first end portion and a closed second end portion, and the open first end portion faces the leading portion, a and the filter stocking forms a receptacle. A method for emptying the collecting device is described.

Abstract: A packer assembly for use in a subterranean well can include a seal element which swells in the well, a reinforcement in the seal element, and an extrusion barrier which displaces outward in response to swelling of an end portion of the seal element, the reinforcement being longitudinally spaced apart from the end portion of the seal element. A method of constructing a packer assembly can include positioning a reinforcement in a seal element which swells in response to contact with a fluid, the positioning including longitudinally spacing opposite ends of the reinforcement away from opposite end portions of the seal element, and installing extrusion barriers which radially outwardly overlie the seal element end portions.

Abstract: A packer can include an end ring positioned proximate a seal element on a base pipe, and a gripping device positioned in an annular space between the end ring and the base pipe, the gripping device comprising a polymer composition material. A method of constructing a packer can include positioning an end ring on a base pipe, and then injecting a gripping device into an annular space between the end ring and the base pipe, whereby the gripping device grips the base pipe. Another method of constructing a packer can include positioning a gripping device in an annular space between an end ring and a base pipe, so that the gripping device grips the base pipe, the gripping device comprising a polymer composition material.

Abstract: A packer assembly for use with a subterranean well can include a base pipe, at least one ring-shaped reinforcement plate which encircles the base pipe, and at least one swellable seal material which longitudinally straddles the reinforcement plate on the base pipe. A method of constructing a packer assembly can include securing at least one ring-shaped reinforcement plate to a base pipe, the plate encircling the base pipe, and then positioning at least one swellable seal material on the base pipe, the swellable seal material straddling the reinforcement plate. Another method of constructing a packer assembly can include securing at least one ring-shaped reinforcement plate to at least one swellable seal material, and then positioning the plate and the swellable seal material on a base pipe.

Abstract: A packer assembly for use in a subterranean well can include a seal element which swells in the well, a reinforcement in the seal element, and an extrusion barrier which displaces outward in response to swelling of an end portion of the seal element, the reinforcement being longitudinally spaced apart from the end portion of the seal element. A method of constructing a packer assembly can include positioning a reinforcement in a seal element which swells in response to contact with a fluid, the positioning including longitudinally spacing opposite ends of the reinforcement away from opposite end portions of the seal element, and installing extrusion barriers which radially outwardly overlie the seal element end portions.

Abstract: A mixer (1) for processing one or more fluid media (2) and optionally one or more solid media (3). The mixer (1) consists of a tank (4) with one or more filling openings (5) and a discharge opening (6) at the bottom of the tank (4), and a mixer unit (8) provided at the bottom of the tank. The mixer unit (8) includes a rotor (9), an inlet (10) and an outlet (11). The mixer unit (8) also includes a valve arrangement (12) with a valve body (13), an inlet (14) communicating with the outlet of the mixer unit (8), a first outlet (14) communicating with the discharge opening (6) of the tank and a second outlet (15) communicating with an inlet in the tank (4). A connection (20) may be provided between the first outlet (15) of the valve arrangement and at least one of the filling openings of the tank.

Abstract: A packer assembly for use with a subterranean well can include a base pipe, at least one ring-shaped reinforcement plate which encircles the base pipe, and at least one swellable seal material which longitudinally straddles the reinforcement plate on the base pipe. A method of constructing a packer assembly can include securing at least one ring-shaped reinforcement plate to a base pipe, the plate encircling the base pipe, and then positioning at least one swellable seal material on the base pipe, the swellable seal material straddling the reinforcement plate. Another method of constructing a packer assembly can include securing at least one ring-shaped reinforcement plate to at least one swellable seal material, and then positioning the plate and the swellable seal material on a base pipe.

Abstract: A well packer can include a seal element adapted to extend continuously about a tubular, the seal element including a swellable material, and multiple longitudinally extending cement flow channels formed on an exterior of the seal element. A method of constructing a well packer for use in cementing a tubular in a wellbore can include forming a seal element having multiple longitudinally extending cement flow channels on an exterior thereof, the seal element including a swellable material, and positioning the seal element on the tubular, the seal element extending continuously about the tubular. A method of cementing a tubular in a wellbore can include flowing cement through an annulus between the tubular string and the wellbore, the flowing including flowing the cement through multiple longitudinally extending cement flow channels on a seal element which continuously encircles the tubular, and swelling a swellable material of the seal element.

Abstract: A mixer (1) for processing one or more fluid media (2) and optionally one or more solid media (3). The mixer (1) consists of a tank (4) with one or more filling openings (5) and a discharge opening (6) at the bottom of the tank (4), and a mixer unit (8) provided at the bottom of the tank. The mixer unit (8) includes a rotor (9), an inlet (10) and an outlet (11). The mixer unit (8) also includes a valve arrangement (12) with a valve body (13), an inlet (14) communicating with the outlet of the mixer unit (8), a first outlet (14) communicating with the discharge opening (6) of the tank and a second outlet (15) communicating with an inlet in the tank (4). A connection (20) may be provided between the first outlet (15) of the valve arrangement and at least one of the filling openings of the tank.

Abstract: A packer can include an end ring positioned proximate a seal element on a base pipe, and a gripping device which is compressed radially inward by a surface formed in the end ring, the surface encircling the base pipe. A method of constructing a packer can include positioning an end ring on a base pipe proximate a seal element, and radially compressing a gripping device in the end ring, so that the gripping device grips the base pipe, radial compression of the gripping device resulting from longitudinal displacement of the gripping device relative to the end ring.

Abstract: A packer can include an end ring positioned proximate a seal element on a base pipe, and a gripping device which is compressed radially inward by a surface formed in the end ring, the surface encircling the base pipe. A method of constructing a packer can include positioning an end ring on a base pipe proximate a seal element, and radially compressing a gripping device in the end ring, so that the gripping device grips the base pipe, radial compression of the gripping device resulting from longitudinal displacement of the gripping device relative to the end ring.

Abstract: A packer assembly can include an annular seal element and an end ring including leaves formed on a body of the end ring, whereby the leaves are biased radially outward when the seal element extends radially outward. A method of sealing an annulus in a subterranean well can include positioning a circumferential series of leaves radially outwardly overlying an annular seal element of a packer assembly, and the leaves pivoting radially outward in response to swelling of the seal element. Another packer assembly can include an annular seal element which swells in response to contact with a selected fluid in the well, and an end ring including an end ring body with a removable portion being engaged with the end ring body via interlocking profiles.

Abstract: A packer assembly can include an annular seal element and an end ring including leaves formed on a body of the end ring, whereby the leaves are biased radially outward when the seal element extends radially outward. A method of sealing an annulus in a subterranean well can include positioning a circumferential series of leaves radially outwardly overlying an annular seal element of a packer assembly, and the leaves pivoting radially outward in response to swelling of the seal element. Another packer assembly can include an annular seal element which swells in response to contact with a selected fluid in the well, and an end ring including an end ring body with a removable portion being engaged with the end ring body via interlocking profiles.