Wired measurement and transmission motor for measurement while-drilling instrument

The invention relates to a wired measurement and transmission motor for a measurement while-drilling instrument, which mainly solves the problems that a measurement parameter measuring point is far from a well bottom and high-quality communication is difficult to realize by adopting a wireless communication mode in the prior art. The wired measurement and transmission is characterized in that: a main measurement assembly I is arranged on a transmission shaft (1); a male slip ring (13) is placed in a short joint (16) of a male slip ring assembly; communicating axial holes are formed inside a shell D (8), a shell A (10), a stator tube shell (11), a shell B (12) and a step (14) of the male slip ring (13); the end faces of the shell D (8), the shell A (10), the stator tube shell (11), the shell B (12) and the step (14) of the male slip ring (13), corresponding to the axial holes, are provided with annular grooves (25); communication wires are placed in the axial holes; and conductive rings ...

Hard mould material for casting low-smelting-point non-ferrous alloy

Primary measurement shell for measurement while-drilling instrument

The invention relates to a primary measurement shell for a measurement while-drilling instrument. The primary measurement shell comprises a short joint body, a buckling cover and a conductive ring; the short joint body is uniformly milled with alternated convex walls along the circumferential direction, concave walls are formed among the convex walls, step grooves are milled on the concave walls, the buckling cover is fixed on the step grooves, closed instrument compartments are preformed at the combination part of the buckling cover and the short joint body, an axial routing hole is drilled on a shoulder at a male buckle end of the short joint body, a routing through hole is drilled between the instrument compartments, a conductive ring slot is lathed on the shoulder surface at the male buckle end of the short joint body, the conductive ring is placed in the conductive ring slot, and a routing hole is drilled in the conductive ring slot; and the routing hole, the routing through hole and ...

Shell of electromagnetic wave resistivity instrument

The invention relates to a shell of an electromagnetic wave resistivity instrument. The shell of the electromagnetic wave resistivity instrument comprises a short segmental body (1) of which the outer wall is provided with a groove, the groove is internally fixed with a buckle cover body (2) coinciding with the groove in shape, the outer wall of the buckle cover body (2) is spaced with an antennagroove (10), an upper opening of the antenna groove (10) is provided with an antenna rib (5), a lower opening of the antenna groove (10) is provided with a gasket (7) which is provided with a routinghole (6), and an installation groove (11) is arranged on the inner wall of the buckle cover body between two adjacent antenna grooves (10). The invention overcomes the limits of motor machines and physical space, designs the shell structure of the electromagnetic wave resistivity instrument in the limited space, and realizes near-bit resistivity measurement in an electromagnetic wave mode with high precision ...

Thin-walled hollow metal handicraft and its making process

The thin-walled hollow metal handicraft has the material composition of Pb 70-94 wt%, Sn 0-20 wt%, SB 5-20 wt% and Cu 0-1 wt%. The making process includes smelting the metals, casting in metal or non-metal mold, and pouring out excessive molten metal after the molten metal is solidified to required wall thickness. The product has the advantages of light weight owing to its thin wall, high production efficiency and low cost.

Hard mould material for casting low-smelting-point non-ferrous alloy

A hard mould material for casting low-semelting-point non-ferrous alloy is made up of epoxy resin (1 portion), low-molecular polyamide resin 650 (0.3-2) and metal powder in 500-2000 meshes (0.2-3) through proportional mixing. Its advantages include short manufacture period and a certain service life and easy repair.

一种薄壁、中空金属工艺品及其制造方法

... 本发明涉及一种薄壁、中空金属工艺品及其制造方法。它由金属铅、锡、锑和铜组成，各组分的重量含量为：铅70-94％，锡0-20％，锑5-20％，铜0-1％；该产品的制造方法包括：(1)将金属铅、锡、锑和铜熔炼；(2)将熔炼后的金属注入金属或非金属制造的硬模中；(3)待紧靠外壁的金属凝固到所需壁厚时，即形成所需铸件，如果注入量大于铸件需要量，将未凝固的金属倒出，即可形成所需铸件。以本方法生产出的产品具有以下优点：1.铸件重量轻。可制作的铸件壁厚比熔模铸造法和采用型芯的硬模铸造法生产的铸件壁厚更薄、铸件重量更轻。2.生产效率高。比采用熔模铸造方法生产效率提高5倍以上，比采用型芯硬模铸造方法生产效率提高3倍。3.铸件成本低。比采用熔模铸造方法生产的铸件成本降低1倍以上，比采用型芯硬模铸造方法生产的铸件成本降低0.5-1倍。 ...

Lithium iron phosphate flexible packed lithium ionic cell

The invention relates to a lithium ion battery flexibly packaged by lithium iron phosphate; a formula of an electrolyte comprises the following compositions: LiBOB, PS, BS, EC, PC, EMC, LiPF6 and VC; an anode material comprises the following compositions: LiFePO4, carbon black, an adhesive and a conduction agent; and a cathode material comprises the following compositions: graphite, carbon black and an adhesive. The lithium ion battery optimizes the electrolyte, improves the capacity and the safety performance of the battery on the basis of ensuring the electrochemical performance of the battery; the improvement of the anode material and the cathode material solves the problems of poor self conduction of the lithium iron phosphate, environmental protection and cost; in a preparation process, the preparation of an anode slurry and a cathode slurry, the anode coating environment and a process of the electrode rolling course are improved; and the lithium ion battery flexibly packaged by the ...