Stabilizing tool for well drilling
AssigneeOil Patch Group, Inc.
InventorsGregg S. Perkin, Duane D. Papke
Life of this patent
Estimating the term…
Abstract
A drilling tool for use in drilling operations for providing shock absorption capability and lateral support to the rotary drill string. The telescoping axial load shock absorber is positioned immediately adjacent at least one lateral support provided by a reamer or stabilizer. The stabilizer preferably employs a removable fixed blade secured to the tool by an undercut groove. The roller cutter for a reamer is also mounted in a preferred unique manner with the mounting blocks secured in a recess having an undercut retainer portion in the event of bolting failure. The mounting's brackets may be formed integral of the tool body or attached by welding or the like. A preferred form of mounting a blade on a stabilizer tool is also disclosed.
Claims12
A mounting bracket assembly for a blade of a fixed blade stabilizer, including:
- a bracket body forming a blade receiving slot having a pair of spaced apart blade support walls for removably receiving therebetween a portion of the blade,
- said slot having and end closure for preventing movement of the blade from said slot, said slot having an open end for enabling insertion and removal of the blade from said slot;
- a securing bolt having a first and second end and threaded sufficiently for securing the blade in said slot upon tightening of said bolt, at least one end of said bolt operably securable to said end closure;
- a movable blade retainer for closing said open end of said blade receiving slot, said blade retainer operably connected with said bolt for forcing against the received blade upon tightening of the bolt, said blade retainer forming a wedging surface for forcing the portion of the stabilizer blade positioned in said slot into securing engagement with said blade support walls upon tightening of said bolt.
A fixed blade stabilizer tool adapted for use in a drill string during rotary drilling operations to form a bore hole, including:
- a tubular member forming an outer surface and having upper and lower threaded connections for mounting said tubular member at a desired location in the drill string;
- at least one bore hole wall contacting blade fixedly disposed on said outer surface of said tubular member for radially enlarging the bore hole and for supporting the drill string in the bore hole;
- means for mounting said blade on said tubular member including a bracket body having a blade receiving slot forming a pair of blade support walls for removably receiving therebetween a portion of said borehole wall contacting blade,
- and end closure for one end of said slot to block movement of said blade from said slot;
- said slot having an open end for enabling insertion and removal of the blade as desired from said slot;
- a moveable blade retainer for closing said open end of said blade receiving slot,
- means for securing said movable blade retainer to said end closure;
- and
- said blade retainer forming a wedging surface for forcing the portion of the stabilizer blade positioned in said slot into securing engagement with said blade support walls upon securing of said movable blade retainer to said end closure.
Dependencies are inferred from the claim text.