Drill bit assembly for fluid-operated percussion drill tools

    公开(公告)号:US12123260B2

    公开(公告)日:2024-10-22

    申请号:US17780121

    申请日:2020-11-24

    发明人: Joseph Purcell

    IPC分类号: E21B10/36 E21B17/07

    CPC分类号: E21B10/36 E21B17/076

    摘要: The present invention relates to a drill bit assembly for fluid-operated percussion drill tools. The drill bit assembly comprises a percussion bit having a head portion formed with an axially extending shank, a first plurality of axially extending splines on the shank slideably engageable with a first plurality of complementary splines formed internally of a drive chuck whereby rotational drive from the chuck may be transmitted to the shank. The assembly also comprises engagement means on the chuck adapted for connecting the chuck to a drive means of the fluid-operated percussion drill tool. During drilling, the bit and the chuck are held in a first relative orientation in which the bit is retained in the chuck, and the bit is moveable axially relative to the chuck to a bit removal position, in which the bit is rotatable relative to the chuck to a second relative orientation in which the bit is removable from the chuck. The bit is moveable to the bit removal position while the chuck is fully engaged with the drive means.

    Pumping apparatus
    3.
    发明授权

    公开(公告)号:US12116221B2

    公开(公告)日:2024-10-15

    申请号:US17906350

    申请日:2021-03-19

    申请人: IMERTECH SAS

    发明人: Morgan Jokela

    IPC分类号: F04B15/02 B65G53/42 B65G53/46

    摘要: Pumping apparatus comprises a granular material pump assembly and a distributor having a distribution end for distributing granular material. The granular material pump assembly is configured to pump granular material through the distributor towards the distribution end. The distributor is configured to permit granular material to exit the distributor at the distribution end when an amount of granular material pumped towards the distribution end exceeds a threshold, for example wherein the distributor comprises a valve assembly configured to permit granular material to exit the distributor at the distribution end when the amount of granular material pumped towards the distribution end exceeds the threshold, optionally wherein the valve assembly comprises a valve configured to open to permit granular material to exit the distributor at the distribution end when the amount of granular material pumped towards the distribution end exceeds the threshold.

    Spark plug
    6.
    发明授权

    公开(公告)号:US12095235B2

    公开(公告)日:2024-09-17

    申请号:US18567558

    申请日:2022-06-14

    申请人: NITERRA CO., LTD.

    IPC分类号: H01T13/38

    CPC分类号: H01T13/38

    摘要: In a spark plug 1 of the present invention, in a mirror-polished surface 230a obtained by mirror-polishing a cut surface 230 obtained by cutting an insulator 2 in a direction perpendicular to an axial line AX direction, at a position separated by 2 mm from a portion having a maximum diameter of a diameter-enlarged portion 31a to a rear end side along the axial line AX direction, when 20 first observation regions X each being 192 μm×255 μm are set so as to each overlap a reference position m1 being a position 0.2 mm in a radial direction from an inner peripheral surface 2a side of the insulator 2 and so as not to overlap each other, a proportion (porosity) of an area of all of pores included in the 20 first observation regions X relative to a total area (100%) of the 20 first observation regions X is not greater than 3.5%, and in a thermally etched surface 230b obtained by subjecting the mirror-polished surface 230a to thermal etching, when 20 second observation regions Y each being 32 μm×43 μm are set so as to each overlap the reference position m1 and so as not to overlap each other, a particle size distribution of alumina particles included in the 20 second observation regions Y is regarded as a normal distribution, an average particle diameter of the alumina particles is defined as A, and a standard deviation of a particle diameter of the alumina particles is defined as σ, A is not less than 1.9 μm and not greater than 2.8 μm, and (A+3σ) is not greater than 3.0 μm.

    Pipe joint
    7.
    发明授权

    公开(公告)号:US12092244B2

    公开(公告)日:2024-09-17

    申请号:US17769372

    申请日:2020-10-05

    IPC分类号: F16L21/04 F16L21/08 F16L57/02

    CPC分类号: F16L21/08 F16L21/04 F16L57/02

    摘要: In a pipe joint, a spigot is inserted into a socket; a lock ring is accommodated in a lock ring-accommodating groove formed in the inner circumference of the socket; and an engaging part formed in the outer circumference of the spigot, wherein the engaging part engages with the lock ring from a back side of the socket in a separation direction A of the spigot, thereby preventing the spigot from separating from the socket. The engaging part is formed at a position receding from a distal end of the spigot in the separation direction A of the spigot. A bending suppressing member for restricting the socket and the spigot in a bending direction C is provided between the inner circumference of the socket and the outer circumference of the spigot in the range between the distal end of the spigot and the engaging part.

    Low-cost viscous-drag-reducing cladding

    公开(公告)号:US12065218B2

    公开(公告)日:2024-08-20

    申请号:US17622351

    申请日:2020-06-29

    IPC分类号: B63B1/38 B63B1/34 B63B59/02

    摘要: A low-cost viscous-drag-reducing cladding for a ship's hull comprising airbags whose outer surfaces are adapted to be water repelling. Each airbag comprises a plenum that comprises substantially open space, which does not obstruct the flow of air through it. The airbags are inflated with compressed air to a pressure higher than the adjoining hydrostatic pressure. The airbag material comprises a reinforcing fabric, which is adapted to withstand the forces encountered during operation, and is sealed with a sealant so as to be made substantially impermeable to air. The outer water-repelling surface of each airbag is connected to a plenum by means of restrictor holes. Air flows from the plenum through the restrictor holes into the water-repelling layer.

    Damage detection system and method of use

    公开(公告)号:US12025377B2

    公开(公告)日:2024-07-02

    申请号:US16482837

    申请日:2018-01-31

    申请人: IMERTECH SAS

    摘要: The present invention relates to damage detection systems for refractory linings for molten metal vessels, comprising an electrically conductive grid disposed underneath the surface of the refractory lining closest to a molten metal when in use, one or more electrically conductive electrodes disposed in contact with the molten metal when in use and an electrical power source, wherein the electrically conductive metallic grid and the one or more electrically conductive electrodes are electrically connected to each other, such as to form an open electrical circuit powered by the said electrical power source, and a detected closure of the said electrical circuit during normal use of the molten metal vessel indicates that the said refractory lining is damaged, or the presence of a molten metal during normal operation of the vessel closes the said electrical circuit in case the refractory lining is damaged. The present invention relates to a method for detecting damage in a refractory lining during use, and the use of a damage detection system according to the invention.