Mud Pump Components and Spare Parts Several types
More common types of mud pump cylinder liner: single metal cylinder liner, bimetallic cylinder liner, ceramic cylinder liner, nickel-based alloy cylinder liner.
Single metal cylinder:
Single metal cylinder liner is carburizing and high frequency treatment, the hardness can be HRC58-62, with high finish, wear resistance, corrosion resistance, long service life characteristics, suitable for use in the more corrosive mud.
Bimetallic Cylinder Liner:
Bimetallic cylinder is one of the most widely used, but also the largest amount of mud pump hydraulic end fittings. Bimetallic cylinder liner with hot forging high-wear jacket and high-chromium wear-resistant anti-corrosion package of the strengths of the jacket selection of high-quality carbon steel hot pressing a molding, the use of high-chromium cast iron centrifugal casting, during which the jacket has higher than 900000psi tensile strength, the jacket after the heat treatment to reach HRC62 above, can accept 7000psi mud pressure, the internal and external surface lubrication as a mirror, the hole standard tolerance, the normal life of up to 800 hours or more.
Nickel-based alloy cylinder liner:
With the continuous progress of science and technology, has developed a new material made of nickel-based alloy cylinder liner, the skills for the alloy material covered in the inner wall of the cylinder liner, the use of vacuum sintering skills, constitute 1.5mm alloy sintered layer, sintered layer information The use of high-performance rare earth nickel-based alloy powder to add a micron-grade carbide data, so that the sintered layer evenly distributed with micron-grade high wear-resistant hard points, effectively improve the sintered layer of all anti-wear function, Together because of the alloy arrangement and its small, will not attack the scene such as spalling. Because the powder constitutes a good alloy sintered layer, contact strength is good, sintered Rockwell hardness to reach HRC: 60-64.
Ceramic Cylinder Liner:
Ceramic cylinder liner is the use of zirconia, zirconia toughened alumina (ZTA), high-performance A-99 alumina ceramic three data systems. The original material selection of high purity nano-zirconia and alumina powder, the leading cold-pressing skills of a molding, high temperature sintering, assembly, and finally by high-precision grinding and polishing, with a high resistance, tensile strength, high Fracture toughness and acid corrosion resistance.
The typical structure of the mud pump is a double-cylinder double-acting pump, which is relatively reliable when used, but the volume and weight are large, the efficiency is low and the pressure fluctuates greatly. With the increase of drilling depth and the increase of casing level, the drilling pump displacement and pump pressure put forward higher and higher requirements. This also led to a sharp increase in pump power, pump weight and size also increased. In order to reduce the pump weight, when the design of the twin cylinder pump is a greater improvement is to iron and reduce the pump. To steel plate is welded with steel plate instead of cast iron pump shell, and some parts to use high-quality alloy steel; reduce the pump width is the application of large diameter rolling bearings for connecting rod big end support, to abandon the cantilever crankshaft design. In this way, the center distance between the two cylinders is significantly reduced. These are the main improvements in the 1950s twin cylinders.