A new steerable motor assembly has been designed that provides significant advantages over conventional steerable motor assemblies. The new system, SlickBore, is comprised of a uniquely designed pin-down mud motor with a specially designed long-gauge PDC bit in a matched drilling system. By treating the bit and motor as a system, it has been possible to overcome the directional limitations previously experienced when long-gauge bits, or short-gauge bits with piggyback stabilization, were used in combination with conventional motors. This paper describes the new system, its key working principles, and the drilling tests and computer modeling used to confirm the initial design concepts. The paper will also highlight selected field results from more than 100 runs made to date. The field results have not only proven the working principles but also demonstrated its advantages over the conventional steerable systems. The benefits include increased ROP, improved hole quality with less hole spiraling and thus less tortuosity, reduced vibration, lower torque and drag, better steerability, better hole cleaning, increased bit life, and improved PDM and MWD reliability.
Improved steerable system: working principles, modeling, and testing
2000
13 Seiten, 6 Quellen
Aufsatz (Konferenz)
Englisch
Steerable suspension system and working method thereof
Europäisches Patentamt | 2021
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