Patents
US 10301880 B2: Over-bit reamer
- Granted
- 2019-05-28
- Filed
- 2016-09-26 application 15276336
- Type
- Utility · 22 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An over-bit backreamer. The backreamer is configured to be placed over a bit without detaching the hit from a drill string associated with a pilot bore. The backreamer has an internal surface that conforms to a steering surface of the hit. Rotation is transferred from the bit to the backreamer at the internal surface. The backreamer further defines a flange which interacts with a feature, such as a heel, on the bit. The flange and heel form a shoulder which transfers pullback force to the bit. The backreamer comprises a pullback eye that pulls a product pipe back through the borehole.
Source: PVGPATDIS, file of 2026-04-10 (ipg190528.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Radius HDD Direct LLC 7 patents | US company or organization | Perry, OK | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| David G. Bullock | Weatherford, TX | 7 | PVGPATDIS, file of 2026-04-10 | |
| Ronald F. Wright | Weatherford, TX | 8 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E21B | Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells | E21B7/28 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2020-04-01 | Assignment Assignment of assignor's interest | RADIUS HDD DIRECT LLC signed 2020-03-30 | THE CHARLES MACHINE WORKS, INC. PERRY, OK | 52282/528 | ECORSEXC, file of 2026-09-25 |
| 2016-09-27 | Assignment Assignment of assignor's interest | BULLOCK, DAVID G. signed 2016-06-13 WRIGHT, RONALD F., JR. signed 2016-06-13 | RADIUS HDD DIRECT, LLC PERRY, OK | 39861/937 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.