Patent US4168752A successfully refreshed from Google Patents.
US4168752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible conduit for effecting lateral channelling in coal or oil shale beds
Assignee: SABOL RESEARCH & DEVELOPMENT Ltd A BODY CORPORATE OF ALBERTA
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Filing: 1977-11-23
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Granted: 1979-09-25
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Expires: 1997-11-23
Abstract
Abstract There is provided in accordance with the invention apparatus and a method for boring holes through carbonaceous deposits. The method involves the step of introducing combustion-supporting gases such as air under pressure through the apparatus installed in a well hole opposite the area to be bored. The apparatus comprises inner and outer flexible tubes with flexible, jointed armour and a directional nozzle which permits it to be bent and change attitude as necessary. The adjacent carbonaceous interface after being ignited is maintained in this condition by the combustion-supporting gas which is supplied under pressure. As the combustion proceeds, the pressure expels the combustion products and the gas injector is advanced along the channel it has previously formed.
Inventors
- 👤 Karol Sabol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:01
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/20; E21B17/18; E21B36/00; E21B36/02; E21B43/00; E21B43/16; E21B43/24; E21B43/243; E21B43/247; E21B7/00; E21B7/04; E21B7/06; E21B7/061; E21B7/14; F; F16; F16L; F16L11/00; F16L11/14; F16L11/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
Bendable hose apparatus having a combustion end for continually supplying a combustion-supporting gas to a subsurface carbonaceous formation to produce a tubular cavity therein by combustion of said carbonaceous material in the formation which comprises: an inner continuous gas-conducting hose; an outer armour hose surrounding said inner hose, said outer hose comprising a plurality of individual tubular sections moveable into and out of engagement with adjacent individual sections in response to said hose attitude; a first continuous flexible metal strip secured to each of said outer hose sections; and a second continuous flexible metal strip slidably connected to each of said outer hose sections opposite said first metal strip securement; and a rigid, metal heat-resistant nozzle mounted at least on said inner hose at a combustion end thereof.
Claim 2
Dependent Claim
128 words
Bendable hose apparatus having a combustion end for continually supplying a combustion-supporting gas to a subsurface carbonaceous formation to produce a tubular cavity therein by combustion of said carbonaceous material in the formation which comprises: an inner continuous gas-conducting hose; an outer armour hose surrounding said inner hose, said outer hose comprising a plurality of individual tubular sections moveable into and out of engagement with adjacent individual sections in response to said hose attitude; a first continuous flexible metal strip secured to each of said outer hose sections; and a second continuous flexible metal strip slidably connected to each of said outer hose sections opposite said first metal strip securement; and a rigid, metal heat-resistant nozzle mounted at least on said inner hose at a combustion end thereof.
Claim 3
Dependent Claim
31 words
Apparatus as claimed in claim 1 wherein said individual sections of said outer hose each have an end surface, said end surfaces each being stepped to reciprocally engage adjacent end surfaces.
Claim 4
Dependent Claim
26 words
Apparatus as claimed in claim 1 wherein said first flexible metal strip is permanently secured at a fixed point on each of the said individual sections.
Claim 5
Dependent Claim
38 words
Apparatus as claimed in claim 2 wherein said second metal strip has a plurality of longitudinal slots therein; and each of said outer hose sections has a projection extending therefrom engageable with an individual one of said slots.
Claim 6
Dependent Claim
65 words
Apparatus as claimed in claim 1 wherein said nozzle has a forward and rear end and comprises inner and outer members; said inner member comprising a heat resistant tube converging adjacent to the forward end secured to said inner hose; and said outer members being secured to said inner member adjacent the forward end thereof and to the outer hose adjacent the forward end thereof.
Claim 7
Dependent Claim
49 words
Apparatus as claimed in claim 5 wherein said outer members comprise a plurality of radially spaced heat-dissipating and direction-guiding shields converging toward the forward end of said nozzle; and a plurality of supports extending from said inner member to maintain said outer members in a spaced apart relationship therefrom.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |