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Title: Well drilling tool with diamond radial/thrust bearings

Abstract

A turbodrill is disclosed for connection to a drill string and has a rotating shaft for turning a drill bit. The turbodrill has rotor and stator blades operated by drilling mud flowing therethrough to rotate the shaft. The shaft is provided with radial/thrust bearing consisting of a pair of annular plates, each of which has conical surfaces supporting a plurality of friction bearing members of polycrystalline diamond. The radial and thrust loads are carried by the wear-resistant diamond bearing surfaces. The bearing members are preferably cylindrical studs having flat faces with flat disc-shaped diamond bearing members supported thereon around the adjacent surfaces of the supporting plates. The faces of the diamond bearings will wear into smoothly mating conical bearing surfaces with use. There are two or more pairs of diamond radial/thrust bearings to handle longitudinal as well as radial loads. The use of the diamond radial/thrust bearings makes it possible to eliminate the lubricant-flooded construction of prior art turbodrills and allow the bearings to be cooled and lubricated be drilling fluid flowing therethrough. The diamond radial/thrust bearings may be used with lubricant-flooded turbodrills and with other types of downhole motor driven drills such as drills driven by positive displacement motors.

Inventors:
;
Publication Date:
OSTI Identifier:
5432423
Patent Number(s):
US 4410054
Assignee:
Mauer Engineering Inc.
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 3 Dec 1981; Other Information: PAT-APPL-327105
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; TURBODRILLS; BEARINGS; DESIGN; DRILLING EQUIPMENT; DRILLS; TURBOMACHINERY; WELL DRILLING; DRILLING; EQUIPMENT; MACHINERY; ROTARY DRILLS; 020300* - Petroleum- Drilling & Production

Citation Formats

Nagel, D D, and Aparicio, T Jr. Well drilling tool with diamond radial/thrust bearings. United States: N. p., 1983. Web.
Nagel, D D, & Aparicio, T Jr. Well drilling tool with diamond radial/thrust bearings. United States.
Nagel, D D, and Aparicio, T Jr. 1983. "Well drilling tool with diamond radial/thrust bearings". United States.
@article{osti_5432423,
title = {Well drilling tool with diamond radial/thrust bearings},
author = {Nagel, D D and Aparicio, T Jr},
abstractNote = {A turbodrill is disclosed for connection to a drill string and has a rotating shaft for turning a drill bit. The turbodrill has rotor and stator blades operated by drilling mud flowing therethrough to rotate the shaft. The shaft is provided with radial/thrust bearing consisting of a pair of annular plates, each of which has conical surfaces supporting a plurality of friction bearing members of polycrystalline diamond. The radial and thrust loads are carried by the wear-resistant diamond bearing surfaces. The bearing members are preferably cylindrical studs having flat faces with flat disc-shaped diamond bearing members supported thereon around the adjacent surfaces of the supporting plates. The faces of the diamond bearings will wear into smoothly mating conical bearing surfaces with use. There are two or more pairs of diamond radial/thrust bearings to handle longitudinal as well as radial loads. The use of the diamond radial/thrust bearings makes it possible to eliminate the lubricant-flooded construction of prior art turbodrills and allow the bearings to be cooled and lubricated be drilling fluid flowing therethrough. The diamond radial/thrust bearings may be used with lubricant-flooded turbodrills and with other types of downhole motor driven drills such as drills driven by positive displacement motors.},
doi = {},
url = {https://www.osti.gov/biblio/5432423}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {10}
}