Back to results
US 8,025,107 B2Granted
Reamer with polycrystalline diamond compact inserts
AssigneeLongyear TM, Inc.
InventorsKristian S. Drivdahl, Erik M. Gaugh, Michael D. Rupp
Life of this patent
Estimating the term…
Abstract
Reamers for use in core-sample drilling include PDC inserts. Such reamers with PDC inserts may be used to maintain borehole diameters, reduce deviation, and/or stabilize drill strings used in core sample drilling. The PDC inserts may be of different sizes and shapes and may be arranged around the reamers in various ways.
Claims28
A reaming shell for use in core sample drilling comprising:
- a cylindrical, steel body used in core sample drilling, the body including:
- an upper connector configured to couple an upper end of the body to another drilling component,
- a lower connector configured to couple a lower end of the body to an additional drilling component, and
- a length extending from the upper connector to the lower connector, the length having a substantially uniform outer diameter and a consistent outer surface;
- and
- a plurality of polycrystalline diamond compact (PDC) inserts secured directly to the body and arranged around the body;
- wherein the PDC inserts maintain a diameter of a borehole previously drilled.
4 more elements
A core drilling system, comprising
- a drilling component including:
- a cylindrical, steel body configured to be used in core sample drilling, the body having a substantially uniform outer diameter and a consistent outer surface,
- a connector configured to couple the body to another drilling component;
- a first plurality of polycrystalline diamond compact (PDC) inserts attached directly to the body and arranged around the body at a first distance from the connector,
- at least a second plurality of PDC inserts attached directly to the body and arranged around the body at a second distance from the connector;
- and
- a core drill bit.
4 more elements
A drilling method comprising:
- securing an upper connector of a reamer to a first drill string component of a drill string;
- securing a lower end of the reamer to a second drill string component of the drill string, wherein a cylindrical, steel body with a substantially uniform outer diameter and a consistent outer surface extends from the upper connector to the lower connector;
- securing a core drill bit to an end of the drill string;
- advancing the drill string into an earthen formation whereby the core drill bit drills a borehole with a diameter, and whereby a plurality of polycrystalline diamond compact (PDC) inserts arranged around, and fastened directly to the body of the reamer, maintain the diameter of the borehole drilled by the core drill bit;
- and
- retrieving a core sample.
3 more elements
A drilling method comprising:
- securing a connector of a steel drilling component to a drill string, the drilling component being cylindrical and having (i) a substantially uniform outer diameter and a consistent outer surface, (ii) a first plurality of polycrystalline diamond compact (PDC) inserts attached to, and arranged around, the outer surface at a first distance from the connector, and (iii) at least a second plurality PDC inserts attached to, and arranged around, the outer surface at a second distance from the connector;
- securing a drill bit to an end of the drill string;
- advancing the drill string into an earthen formation whereby the drill bit drills a borehole with a diameter, and whereby the first plurality of PDC and the at least a second plurality of PDC inserts maintain the diameter of the borehole drilled by the drill bit;
- retrieving a core sample;
- and
- un-securing at least one PDC insert from the drilling component.
3 more elements
Dependencies are inferred from the claim text.