«Onshore and offshore oil and gas well construction»

Reduction of drilling pumps metal consumption

UDC: 622.24
DOI: -

Authors:

¹ Perm National Research Polytechnic University, Perm, Russia

Keywords: hard-to-recover oil reserves, well drilling, drilling equipment, drilling pumps, triplex, multiplex, metal consumption, valve box

Annotation:

Today, a significant portion of hydrocarbon reserves are hard-to-recover ones, resulting in drilling technology primarily focusing on directional, horizontal, multilateral wells or wells drilled from cluster pads. Furthermore, newly drilled wells are characterized by their long length. The long length of these wells necessitates high pressure availability when delivering drilling fluid for circulation and bottomhole flushing. Currently used mud pumps are characterized by high installed power, large weight, and large dimensions. The described type of pumps is poorly mobile, which limits their effective application. The authors of the article conducted a study to address the pressing issue of reducing the metal content of drilling pumps. Typical drilling pump designs were analyzed. It was noted that plunger pumps are significantly lighter than piston pumps (with equal power), and the hydraulic section design with a coaxial valve arrangement is characterized by low metal content. The valve boxes of drilling pumps were calculated according to their technical and strength properties, 3D models were built in the "COMPAS-3D" program, and their mass-centering characteristics and metal content were assessed. It was revealed that the metal content of the drilling pump's hydraulic section has a power-law dependence on its power, and that an increase of the number of working cylinders in a drilling pump makes its hydraulic section metal content decrease. This fact suggests the potential for increasing the number of working cylinders in crank piston pump designs. It is noted that for the mechanical part of drilling pumps the metal consumption can likely be reduced by increasing the number of working cylinders. However, this hypothesis requires further research.

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