Downhole tool and method of manufacturing a tool
US-2016138343-A1 · May 19, 2016 · US
Downhole tool and method of manufacturing a tool
US10472896B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10472896-B2 |
| Application number | US-201514945203-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 18, 2015 |
| Priority date | Nov 19, 2014 |
| Publication date | Nov 12, 2019 |
| Grant date | Nov 12, 2019 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Producing a drag bit includes creating a mold corresponding to the surface of the bit and inserting a core in the mold corresponding to the plenum of the bit. A preliminary shaped bit is cast in the mold. Excess material is removed from the casting to produce a final shaped bit.
First claim
Opening claim text (preview).
The invention claimed is: 1. A steel casting for a tool to drill a borehole includes: a body; blades extending from the body; and a plenum in the body; wherein the blades are machined to a final dimension and the plenum includes extensions to limit the mass of the body at the root of each blade. 2. The steel casting of claim 1 wherein the extensions to limit the mass of the body at the root of each blade extend helically with the root of the blades on the body of the bit. 3. The steel casting of claim 1 wherein the steel casting is heat treated prior to machining to reduce hardness. 4. The steel casting of claim 1 wherein the steel casting is heat treated after machining to increase hardness. 5. The steel casting of claim 1 wherein the steel material of the casting is selected for compatibility with corrosive materials encountered in boreholes. 6. The steel casting of claim 1 wherein threads are machined on the cast bit body for mounting the tool to a drill string. 7. The steel casting of claim 1 wherein the tool is a drag bit.
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Classifications
for manufacturing or repairing tools · CPC title
- E21B10/42Primary
Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits (characterised by wear resisting parts E21B10/46; by conduits or nozzles for drilling fluid E21B10/60; by detachable or adjustable parts E21B10/62) · CPC title
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Frequently asked questions
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- What does patent US10472896B2 cover?
- Producing a drag bit includes creating a mold corresponding to the surface of the bit and inserting a core in the mold corresponding to the plenum of the bit. A preliminary shaped bit is cast in the mold. Excess material is removed from the casting to produce a final shaped bit.
- Who is the assignee on this patent?
- Esco Corp, Esco Group Llc
- What technology area does this patent fall under?
- Primary CPC classification E21B10/42. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Nov 12 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).