The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2022
Filed:
Dec. 27, 2017
Obschestvo S Ogranichennoi Otvetstvennostyu “perfobur”, Moscow, RU;
Alexander Vasilievich Lyagov, Ufa, RU;
Ilia Alexandrovich Lyagov, Ufa, RU;
Abstract
The invention relates to the field of drilling. A packed-hole assembly comprises a drill bit, and a positive displacement motor having a bending unit for deviation by a tilt angle f, and further comprises a rotation module and a hinge module which are rigidly connected to one another, to drill pipes and to the motor by threaded connections. The rotation module consists of a fixed shaft with a central channel and axial openings for drilling fluid, and a rotating body with radial channels which is mounted on cageless rolling contact bearings such as to be capable of circular movement as a result of the reactive force of drilling fluid flowing into the annulus of the borehole through the axial openings in the shaft, the space between the shaft and the rotating body, and the radial channels in turn. The hinge module consists of two half bodies connected to one another by a hinge such as to be capable of rotating freely in an apsidal plane by an angle e=f, restricted by cams, wherein at least one half body is provided with centering ribs. The result is an increase in penetration rate and bit run rate.