Abstract:
A drill bit assembly has a bit head and a pin body. The bit head comprises a cutting end, an opposite connecting end with an engagement section, and a feature facing the connecting end. The pin body comprises a tubular body with an axial bore therethrough, a connecting end with an engagement section and a feature facing the connecting end. The drill bit assembly is manufactured by positioning the pin body connecting end with the bit head connecting end such that the pin body and bit head engagement sections overlap with a gap therebetween, and the pin body and bit head features are aligned; injecting a thermoplastic or other connecting material in liquid form between the bit head and pin body engagement sections and into the gap; and solidifying the thermoplastic or other connecting material such that the bit head and pin body are mechanically coupled together at their connecting ends and their features are securely aligned.
Abstract:
An interchangeable sleeve (100) for a downhole tool (10) includes a substantially cylindrical body configured to circumferentially engage the downhole tool, a blade (102) extending radially from the body, and a transducer (104) disposed within the blade. A drilling assembly includes a drill collar (50), an interchangeable blade configured to couple to the drill collar, and a transducer disposed within the blade. A size of the blade and a size of the transducer are selected based on a diameter of a borehole in which the downhole tool is to be used. A method of manufacturing an interchangeable sleeve for a downhole tool includes forming a blade on a body of the sleeve such that the blade extends radially from the body, disposing a transducer within the blade, and configuring the sleeve to circumferentially engage the downhole tool.
Abstract:
A valve includes a seat, a ball, a stem, and a spring. The ball is separate from the stem. In a closed position, the ball seals against the seat. The spring biases the steam against the ball and the ball against the seat in the closed position. When pressure is applied to the valve, the spring compresses and the stem and ball move away from the seat, opening the valve. The ball can freely rotate or pivot relative to the seat such that the ball has multiple possible sealing surfaces to engage the seat. The valve can be used in a gas lift system.
Abstract:
An apparatus for determining the resistivity of formation (2) surrounding a borehole comprising: an elongate conductive body (1); a pair of transmitter antennas comprising first and second antennas (3,4) mounted on the body for inducing a current in the formation; and a pair of receiver antennas comprising first and second antennas (5,6) mounted on the body for measuring an axial current running in the tool body at the location of the receivers; wherein the pair of transmitter antennas is located to one side of the pair of receiver antennas.
Abstract:
A seismic sensor module includes sensing elements arranged in a plurality of axes to detect seismic signals in a plurality of respective directions, and a processor to receive data from the sensing elements and to determine inclinations of the axes with respect to a particular orientation. The determined inclinations are used to combine the data received from the sensing elements to derive tilt-corrected seismic data for the particular orientation.