Polycrystalline diamond assemblies with cast mounting elements
AssigneeSchlumberger Technology Corporation
InventorDavid Wahlquist
Life of this patent
Estimating the term…
Abstract
A retention mechanism for a PCD insert includes an expansion bolt inserted through a mounting element into a bore of the PCD insert. The bore of the PCD insert has an opening diameter that is greater than a terminal diameter at a terminal end of the bore. The expansion anchor is expanded in the bore, and an interference of the expanded expansion bolt with the body of the PCD insert secures the PCD insert to the mounting element.
Claims20
A polycrystalline diamond (PCD) valve insert, comprising:
- a valve body including a retention end and a working end, the valve body having the PCD along a valve flow surface, the valve body defining a bore extending from the retention end into the valve body toward the working end, an opening of the bore having an opening diameter that is less than a terminal diameter of a terminal end of the bore, the bore continuously expanding from the opening diameter to the terminal diameter, and an inner wall of the bore being configured to contact an expansion anchor.
A kit for a polycrystalline diamond (PCD) valve assembly, comprising:
- a PCD valve insert having a valve body, the valve body having the PCD along a valve flow surface, the valve body including a retention end and a working end, the valve body defining a bore extending from the retention end into the valve body toward the working end, an opening of the bore having an opening diameter that is less than a terminal diameter of a terminal end of the bore, the bore continuously expanding from the opening diameter to the terminal diameter;
- a mounting element;
- and
- an expansion anchor having a tightening head and an expansion head, the expansion head being configured to be inserted through the mounting element and into the bore, the expansion head being expandable to contact an inner wall of the bore and secure the PCD valve insert to the mounting element.
A method for securing a polycrystalline diamond (PCD) valve insert to a mounting element, comprising:
- inserting an expansion anchor through the mounting element and into a bore in a valve body of the PCD valve insert, the valve body having the PCD along a valve flow surface configured to engage a valve seat, an opening of the bore having an opening diameter that is less than a terminal diameter of a terminal end of the bore, the bore continuously expanding from the opening diameter to the terminal diameter;
- and
- expanding the expansion anchor until at least a portion of the expansion anchor engages an inner wall of the bore.
Dependencies are inferred from the claim text.