TO THE QUESTION OF DETERMINING THE DRAG FORCES ON THE SURFACE OF THE DRILL STRING IN CONTACT WITH THE WALL DIRECTIONAL WELL
The article is acquainted with one of the main problems of well construction - determination of resistance force of drill string on the surface of its contact with the wall of a directional well. This problem has not been insignificantly studied by professor A.I. Bulatov, because when cementing a well the success of running casing into a directional well with accessories, including centralizers, cementing sleeves and other technical means, is of great importance. This paper is a continuation of the work of A.I. Bulatov and his associates in developing the ideology of considering and calculating the drag forces in the borehole, depending on various technological factors. The important aspects in studying and determining of drag forces at movement of a drill string in a borehole may arouse a great interest of specialists in the field of directional and horizontal well construction. The authors touch upon the problem of determining by computational method the drag forces in a directional well on the base of registered loads on a hook in the process of penetration and descent of drilling string. With the automated approach, to obtain the values of drag forces in the borehole in real time is of particular scientific interest for their operative reduction and prevention of complications during the construction of wells in Western Siberia.