«Onshore and offshore oil and gas well construction»

Mobile circulation system for cleaning drilling fluid

UDC: 622.24.065
DOI: -

Authors:

¹ Platov South Russian State Polytechnic University, Novocherkassk, Russia

Keywords: drilling fluid cleaning systems, mobile six-stage cleaning system, slurry, magnetic ultrasonic treatment of drilling fluid, clathrate structures, drilling fluid cleaning efficiency

Annotation:

Well-known systems for cleaning drilling fluid from cuttings are considered. A description of a six-stage drilling fluid cleaning system with a magnetosonic device is given. A complex method is proposed – first mechanical, then physical – for cleaning drilling fluid from cuttings using a complex physical field, consisting, successively, of constant magnetic and ultrasonic fields. The use of such a system makes it possible to achieve high-quality purification, including that one at the colloidal level. The goal of the work is to improve the quality of drilling fluid cleaning, reduce the drilling equipment wear and geological complications and accidents as well as to increase the drilling speed. The topic outlined in the article is important and relevant, especially recently, when there are practically no "simple" oil and gas wells left from the point of view of technology and geological sections. In laboratory conditions, the parameters of a polymer clay drilling fluid were determined before and after treatment in a magnetic ultrasonic field. The effectiveness of drilling mud processing using physical fields has been shown – first in the magnetic field and later on in the ultrasonic field. The scheme of the clathrate structures formation during the passage of a polymer clay drilling fluid through a magnetic ultrasonic field is described. The processes occurring when the drilling fluid is exposed to two physical fields are explained. The experimental studies performed made it possible to achieve two times fluid loss reduction, viscosity increase – up to 20 %, while the solution density remained virtually unchanged. The studies were carried out in a constant.

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