US3845828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for original boring described and claimed therein
Assignee: DE FRANCE LARRY
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Filing: 1971-11-12
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Granted: 1974-11-05
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Expires: 1991-11-12
Abstract
Abstract A horizontal boring machine is presented. The machine includes a pump which pumps mud forward through a hollow drill pipe and drill to form a seal on the outside of any casing which is used and to carry cuttings back through the casing. A one-way check valve in the drill pipe prevents mud from flowing back through the drill pipe. A flexible baffle within the casing maintains constant pressure within the casing near the drill. The casing may be moved along with, or independently and selectively ahead of or behind the drill by a hydraulically powered casing clamp. The forward portion of the casing terminates in a slanted shoe permitting control of the direction of boring by rotation of the casing.
Inventors
- 👤 A Taylor
- 👤 R Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:11
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07; E21B7/00; E21B7/04; E21B7/046; E21B7/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
A horizontal boring machine comprising: hollow drill pipe capable of being moved linearly; a drill coupled to and rotated by the drill pipe; pumping means to pump mud to the forward end of the drill; movable power-sub means coupled to rotate the drill pipe; means to control pressure inside the bore near the drill; casing; casing clamp means; a spider; means to longitudinally move the casing via the casing clamp means; a shoe coupled to the forward portion of the casing; means to rotate the casing and shoe in either direction around the drill pipe; wherein the forward edge of the shoe is cut back from a front tip at about 45*; teeth on the forward edge of the shoe; two rams which move the spider; and hydraulic power means.
Claim 2
Dependent Claim
130 words
A horizontal boring machine comprising: hollow drill pipe capable of being moved linearly; a drill coupled to and rotated by the drill pipe; pumping means to pump mud to the forward end of the drill; movable power-sub means coupled to rotate the drill pipe; means to control pressure inside the bore near the drill; casing; casing clamp means; a spider; means to longitudinally move the casing via the casing clamp means; a shoe coupled to the forward portion of the casing; means to rotate the casing and shoe in either direction around the drill pipe; wherein the forward edge of the shoe is cut back from a front tip at about 45*; teeth on the forward edge of the shoe; two rams which move the spider; and hydraulic power means.
Claim 3
Dependent Claim
156 words
A horizontal boring machine comprising: hollow drill pipe capable of being moved linearly; a drill coupled to and rotated by the drill pipe; pumping means to pump mud to the forward end of the drill; movable power-sub means coupled to rotate the drill pipe; means to control pressure inside the bore near the drill; casing; casing clamp means; a spider; means to longitudinally move the casing via the casing clamp means; a flexible baffle inside the portion of the casing near the drill; a one-way check valve permitting mud flow through the drill pipe only toward the drill; a shaker; a mud return which pumps mud and cutting from the casing to the shaker; means to return mud from the shaker to the pumping means; a winch and cable which move the power sub and drill pipe longitudinally in either direction; and teeth on the interior surface of the casing clamp which teeth grip the casing.
Claim 4
Dependent Claim
156 words
A horizontal boring machine comprising: hollow drill pipe capable of being moved linearly; a drill coupled to and rotated by the drill pipe; pumping means to pump mud to the forward end of the drill; movable power-sub means coupled to rotate the drill pipe; means to control pressure inside the bore near the drill; casing; casing clamp means; a spider; means to longitudinally move the casing via the casing clamp means; a flexible baffle inside the portion of the casing near the drill; a one-way check valve permitting mud flow through the drill pipe only toward the drill; a shaker; a mud return which pumps mud and cutting from the casing to the shaker; means to return mud from the shaker to the pumping means; a winch and cable which move the power sub and drill pipe longitudinally in either direction; and teeth on the interior surface of the casing clamp which teeth grip the casing.
Claim 5
Dependent Claim
130 words
A horizontal boring machine, comprising: a drill; hollow drill pipe coupled to and capable of rotating the drill; means to move the drill and drill pipe longitudinally; casing; means to move the casing longitudinally; means to pump mud to fill the space between the casing and the adjacent wall of the bore cut by the drill; a mud pump which pumps mud to the forward end of the drill and forces the mud and cutting out of the back end of the casing; a shaker; a second mud pump which pumps the mud and cutting away from the back end of the casing to the shaker; and means to return a portion of the mud and cutting pumped to the shaker from the shaker back to the first mud pump.
Claim 6
Dependent Claim
130 words
A horizontal boring machine, comprising: a drill; hollow drill pipe coupled to and capable of rotating the drill; means to move the drill and drill pipe longitudinally; casing; means to move the casing longitudinally; means to pump mud to fill the space between the casing and the adjacent wall of the bore cut by the drill; a mud pump which pumps mud to the forward end of the drill and forces the mud and cutting out of the back end of the casing; a shaker; a second mud pump which pumps the mud and cutting away from the back end of the casing to the shaker; and means to return a portion of the mud and cutting pumped to the shaker from the shaker back to the first mud pump.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |