Roller bit rearing wear detection system and method
AssigneeHalliburton Energy Services, Inc.
InventorYuri A. Palaschenko
Life of this patent
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Abstract
A system and method for detecting the wear of a roller bit bearing between a roller drill bit body and a roller bit rotatably attached to the roller drill bit body. A valve-plug is placed between the roller drill bit body and roller bit such that the valve-plug is removably fitted in a drilling fluid outlet in the roller drill bit body, and the valve-plug extends into a channel in the roller bit whereby uneven rotation or vibration of the roller bit causes the valve-plug to impact the sides of the channel which removes the valve-plug from the drilling fluid outlet to cause drilling fluid to flow through the drilling fluid outlet. The drop in pressure from the drilling fluid flowing through the drilling fluid outlet indicates that the roller bit is worn and may fail.
Claims16
A system for detecting the wear of a roller bit bearing, comprising:
- a roller drill bit body having at least one bearing and a drilling fluid outlet selectively having drilling fluid flow therethrough;
- a roller bit rotatably attached to the roller drill bit body at the bearing and adjacent the drilling fluid outlet, wherein the roller bit includes a channel therein;
- and
- a valve-plug removably fitted in the drilling fluid outlet of the roller drill bit body and extending into the channel of the roller bit, wherein uneven rotation of the roller bit causes the valve-plug to impact the sides of the channel and removal of the valve-plug from the drilling fluid outlet thereby causing drilling fluid to flow through the drilling fluid outlet.
A method for detecting the wear of a roller bit bearing on a roller drill bit body having at least one bearing and a drilling fluid outlet selectively having drilling fluid flow therethrough, and a roller bit rotatably attached to the roller drill bit body at the bearing and adjacent the drilling fluid outlet, wherein the roller bit includes a channel therein, the method comprising the steps of:
- placing a valve-plug between the roller drill body and roller drill bit such that the valve-plug is removably fitted in the drilling fluid outlet of the roller drill bit body and extending into the channel of the roller bit;
- rotating the roller bit;
- removing the valve-plug from the drilling fluid outlet through the valve-plug impacting the sides of the channel, thereby causing drilling fluid to flow through the drilling fluid outlet;
- and
- detecting the drop in drilling fluid pressure attributable to drilling fluid flowing through the drilling fluid outlet due to the removing of the valve-plug.
A system for detecting the wear of a roller bit bearing, comprising:
- a roller drill bit body having at least one bearing and a drilling fluid outlet, and the drilling fluid outlet selectively having drilling fluid flow therethrough;
- a roller bit rotatably attached to the roller drill bit body at the bearing and adjacent the drilling fluid outlet, wherein the roller bit includes a channel therein;
- and
- a valve-plug means for detecting the wear of the roller bit, the valve-plug means positioned between the drilling fluid outlet of the roller drill bit body and the channel of the roller bit, wherein the valve-plug means selectively opens the drilling fluid outlet.
Dependencies are inferred from the claim text.