The present disclosure relates to a two-stage rotary vane vacuum pump casing 200 that comprises an exterior surface 202 and a first plurality of cooling fins 204 (214) protruding from the exterior surface 202, wherein each cooling fin 204 (214) extends along the exterior surface 202 between a first and second cooling fin end 201a, 201b, and is a non-planar element that forms an at least partially enclosed cooling channel 206 (216) between the first and second ends 201a, 201b of the cooling fin 204 (214b). The present disclosure also provides a method of making a two-stage rotary vane vacuum pump casing 200 using extrusion and providing a removable end plate for a two-stage rotary vane vacuum pump casing 200.

A modular system for a pump structure for the axial integration of a selection of electric drive assemblies (1) at a selection of pump assemblies (2) and a shaft bearing assembly (3) which includes a pump shaft (31) and a shaft bearing (32) with at least two rolling bearing sets, the shaft bearing (32) supporting the pump shaft (31) between a motor rotor (1) of the electric drive assembly (1) and a pump rotor (21) of the pump assembly (2) at a pump housing (20) of the pump assembly (2); wherein the selection of pump assemblies (2) jointly comprises a collar portion (23) at the pump housing (20) which accommodates the shaft bearing (32) in a through-hole of the pump housing (20) and protrudes to an accommodation side for an electric drive unit (1); and the selection of pump assemblies (2) differs with respect to the pump rotor (21) and/or a pump chamber (22); the selection of drive assemblies (1) jointly comprises a motor rotor (11) which is formed at a radially external section in the shape of a rotor cup (13), the rotor cup (13) radially encircling and axially intersecting the collar portion (23) that each pump housing (20) of the selection of drive assemblies (1) jointly comprises; and the selection of drive assemblies (1) differs with respect to a stator (12); and wherein for each combination of the selection of electric drive assemblies (1) and the selection of pump assemblies (2), at least one radial dimension of the pump shaft, the shaft bearing, the collar portion (23) and/or the rotor cup (13) are the same.

Reinforced directional drilling assemblies and methods of forming reinforced directional drilling assemblies are provided. Strengthening materials may be incorporated into a resilient layer and/or a polymer-based composite material within a directional drilling assembly to improve the durability and performance of a power section within the directional drilling assembly. Inclusion of strengthening materials within a directional drilling assembly may provide a method to detect the status of a power section and send a signal from downhole upon detecting status of the power section. Inclusion of strengthening materials also may provide a method to collect data about operating conditions, including pressure, temperature, torque, RPM, stress level, shock, vibration, downhole weight on bit, and/or equivalent circulating density to send to the surface or to MWD/LWD systems. The strengthening materials may collect data by themselves or in conjunction with a sensor.

Reinforced directional drilling assemblies and methods of forming reinforced directional drilling assemblies are provided. Strengthening materials may be incorporated into a resilient layer and/or a polymer-based composite material within a directional drilling assembly to improve the durability and performance of a power section within the directional drilling assembly. Inclusion of strengthening materials within a directional drilling assembly may provide a method to detect the status of a power section and send a signal from downhole upon detecting status of the power section. Inclusion of strengthening materials also may provide a method to collect data about operating conditions, including pressure, temperature, torque, RPM, stress level, shock, vibration, downhole weight on bit, and/or equivalent circulating density to send to the surface or to MWD/LWD systems. The strengthening materials may collect data by themselves or in conjunction with a sensor.