Patent US3321252A successfully refreshed from Google Patents.
CA1056366A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Rock drilling apparatus and method
Assignee: Individual
•
Filing: 1976-08-30
•
Granted: 1979-06-12
•
Expires: 1996-08-30
Abstract
Abstract ABSTRACT OF THE DISCLOSURE A method of drilling a large hole through rock and removing the drilling waste by drilling a pilot hole from one rock face to another, reverse drilling with a large drill bit and removing the waste during the reverse drilling by pressurizing the pilot hole to eject the waste through a muck extractor dragged behind the large drill bit; and an apparatus to carry out this method consisting of a sealing member for the one rock face, and a muck extractor for securement to the large drill bit.
Inventors
- 👤 Frederick E. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 17:34
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/003; E21B7/28
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
68 words
A muck extractor for removing waste from a drilled hole consisting of a cylindrical drum having a frusto conical shaped insert secured therein, a waste removal pipe secured at the small end of the insert for carrying waste from the insert to a location distant from the hole being drilled, and annular resilient sheets around the drum to form, during use, a seal with the hole being drilled.
Claim 2
Dependent Claim
68 words
A muck extractor for removing waste from a drilled hole consisting of a cylindrical drum having a frusto conical shaped insert secured therein, a waste removal pipe secured at the small end of the insert for carrying waste from the insert to a location distant from the hole being drilled, and annular resilient sheets around the drum to form, during use, a seal with the hole being drilled.
Claim 3
Dependent Claim
29 words
The muck extractor of claim 1, wherein the annular resilient sheets are stacked at one end of the drum, each sheet being spaced from its adjacent sheet by spacers.
Claim 4
Dependent Claim
48 words
The muck extractor of claim 2, wherein the resilient sheets and spacers are held as a unit by a flange and a series of circumferentially spaced bolts passing through the flange, the resilient sheets and the spacers; the flange being secured to, and projecting outwardly from said drum.
Claim 5
Dependent Claim
21 words
The muck extractor of claim 1, wherein a number of longitudinal skids is secured on the outer side of the drum.
Claim 6
Dependent Claim
46 words
The muck extractor of claim 1, wherein a number of radially oriented arms is secured inside the drum ahead of the in-sert, the arms meeting at a central boss which is provided with an axial aperture for accepting a flexible member secured to a drill bit.
Claim 7
Dependent Claim
31 words
The muck extractor of claim 3 wherein the trailing end of the drum is closed and an axially aligned pipe is secured between one end of the drum and the other.
Claim 8
Dependent Claim
22 words
The muck extractor of claim 6, wherein a seal is positioned inside and secured to each end of the axially aligned pipe.
Claim 9
Dependent Claim
24 words
The muck extractor of claim 7, wherein each seal includes a number of annular resilient sheets stacked upon a series of circumferentially spaced bolts.
Claim 10
Independent Claim
151 words
An apparatus for drilling and removing waste from a drilled hole comprising a drill head, a drill string driven by the drill head, a drill bit located at the remote end of the drill string, a sealing member positionable around the drill string and securable to a face of a rock body through which the hole is to be drilled and a non-rotatable muck extractor securable to the drill bit so that it can be dragged along behind the bit during a reverse drilling operation wherein the muck extractor consists of a cylind-rical drum having a frusto conical shaped insert secured therein, a waste removal pipe secured at the small end of the insert for carrying waste from the insert to a location distant from the drill bit, and annular resilient sheets around the drum to form, during use, a seal with the hole being drilled during the reverse drilling operation.
Claim 11
Independent Claim
151 words
An apparatus for drilling and removing waste from a drilled hole comprising a drill head, a drill string driven by the drill head, a drill bit located at the remote end of the drill string, a sealing member positionable around the drill string and securable to a face of a rock body through which the hole is to be drilled and a non-rotatable muck extractor securable to the drill bit so that it can be dragged along behind the bit during a reverse drilling operation wherein the muck extractor consists of a cylind-rical drum having a frusto conical shaped insert secured therein, a waste removal pipe secured at the small end of the insert for carrying waste from the insert to a location distant from the drill bit, and annular resilient sheets around the drum to form, during use, a seal with the hole being drilled during the reverse drilling operation.
Claim 12
Dependent Claim
57 words
The apparatus of claim 9, wherein the sealing mem-ber consists of a generally T-shaped hollow body, one end of the transverse bar of the T having a flange adjacent to said one end so that said one end can be inserted into the rock face up to the flange which forms a seal against the rock face.
Claim 13
Dependent Claim
21 words
The apparatus of claim 10, wherein the other end of the transverse bar of the T has a resilient seal therein.
Claim 14
Dependent Claim
28 words
The apparatus of claim 9 wherein the annular resil-ient sheets are stacked at one end of the drum, each sheet being spaced from its adjacent sheet by spacers.
Claim 15
Dependent Claim
47 words
The apparatus of claim 12, wherein the resilient sheets and spacers are held as a unit by a fixed outer projecting flange at one end of the sheets through which a series of circum-ferentially spaced bolts passes, the bolts passing through the resilient sheets and the spacers.
Claim 16
Dependent Claim
20 words
The apparatus of claim 9, wherein a number of long-itudinal skids are secured on the outer side of the drum.
Claim 17
Dependent Claim
45 words
The apparatus of claim 9, wherein a number of radi-ally oriented arms are secured inside the drum ahead of the insert, the arms meeting at a central boss which is provided with an axial aperture for accepting a flexible member secured to a drill bit.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.