Well bore anchors
AssigneePetrowell Limited
InventorsIain MacLeod, Steve Reid
Life of this patent
Estimating the term…
Abstract
A formation engaging member for use in an open hole anchor (10) is described. The formation engaging member has at least one first open hole surface engaging element (20) for penetrating a surface of an open hole, and at least one second open hole surface engaging element (22) for fractionally interacting with a surface of the open hole to form an interference engagement. A method of anchoring to a formation surface of an open hole and an anchor are also described.
Claims27
A formation engaging member for use in an open hole anchor, the formation engaging member comprising:
- at least one first open hole surface engaging element for penetrating a surface of an open hole, and
- at least one second open hole surface engaging element for frictionally interacting with a surface of the open hole to form an interference engagement with the formation surface,
- wherein the formation engaging member further defines at least one groove separating adjacent open hole surface engaging elements.
A method of anchoring to a formation surface of an open hole, the method comprising the steps of:
- energising at least one formation engaging member from a run-in position to a set position;
- applying a load to the at least one formation engaging member in the set position to cause set formation engaging member to penetrate the formation surface by means of at least one first open hole surface engaging element;
- and
- frictionally engaging at least one second open hole surface engaging element with the formation surface to form an interference engagement with irregularities on the formation surface, adjacent open hold surface engaging elements being separated by a groove, each groove adapted to receive material displaced during anchoring of the formation engaging member.
An anchor for anchoring to a surface of an open hole, the anchor comprising:
- a housing;
- at least one formation engaging member moveably secured to the housing, the at least one formation engaging member having at least one first open hole surface engaging element adapted to penetrate a surface of an open hole and at least one second open hole surface engaging element adapted to frictionally interact with a surface of the open hole to form an interference engagement with the formation surface, wherein the formation engaging member further defines at least one groove separating adjacent open hole surface engaging elements.
An engaging member for use in non-metallic casing, the engaging member comprising:
- at least one first casing surface engaging element for penetrating a surface of the casing, and at least one casing surface engaging element for frictionally interacting with a surface of the casing to form an interference engagement with the casing surface,
- wherein the engaging member further defines at least one groove separating adjacent casing surface engaging elements.
Dependencies are inferred from the claim text.