Patent FR2215860A5 successfully refreshed from Google Patents.
US3901331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support casing for a boring head
Assignee: Total Compagnie Francaise des Petroles SA
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Filing: 1973-12-03
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Granted: 1975-08-26
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Expires: 1993-12-03
Abstract
Abstract Drilling apparatus for installing casing while drilling in which a mobile head is connected to the lower end of a casing by bearing means. A drilling pipe string extends through the casing and is coupled to the casing at the upper end. A drilling bit is fixed to the lower end of the drill pipe and includes a plurality of retractable arms which cooperate with recesses in the mobile head to rigidly connect the drilling bit to the mobile head.
Inventors
- 👤 Branko Djurovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:49
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/20; E21B7/208
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
181 words
A support casing apparatus for a drilling head comprising a casing, wherein the head is connected to the casing by a bearing connecting means permitting free rotation of the head about its axis, first means is provided for coupling the head to a lower portion of a rod string carrying a drilling tool to drive the head, the casing has at its upper portion second coupling means for rigidly attaching it to a pipe string, the second coupling means include a castellated member and in the pipe string includes a pipe with longitudinal grooves in which the castellations of the castellated member are engaged, the rod being attached at its lower portion to a stem supporting a turbine for driving a drilling tool and at its upper portion to a joint of the upper portion of the rod string, the said joint being provided with a sleeve controlled by a valve and with a pipe connected to and for causing unlocking of the second coupling means, such that operation of the sleeve causes release of the pipe string from the casing.
Claim 2
Dependent Claim
181 words
A support casing apparatus for a drilling head comprising a casing, wherein the head is connected to the casing by a bearing connecting means permitting free rotation of the head about its axis, first means is provided for coupling the head to a lower portion of a rod string carrying a drilling tool to drive the head, the casing has at its upper portion second coupling means for rigidly attaching it to a pipe string, the second coupling means include a castellated member and in the pipe string includes a pipe with longitudinal grooves in which the castellations of the castellated member are engaged, the rod being attached at its lower portion to a stem supporting a turbine for driving a drilling tool and at its upper portion to a joint of the upper portion of the rod string, the said joint being provided with a sleeve controlled by a valve and with a pipe connected to and for causing unlocking of the second coupling means, such that operation of the sleeve causes release of the pipe string from the casing.
Claim 3
Dependent Claim
59 words
a mobile drilling head having a series of consecutive recesses on the inner surface thereof, each of said consecutive recesses having a first vertical edge, an inclined ramp extending upwardly from the first vertical edge, and a second vertical edge opposing the first vertical edge and extending upwardly to the top of the inclined ramp of the adjacent recess;
Claim 4
Dependent Claim
59 words
a mobile drilling head having a series of consecutive recesses on the inner surface thereof, each of said consecutive recesses having a first vertical edge, an inclined ramp extending upwardly from the first vertical edge, and a second vertical edge opposing the first vertical edge and extending upwardly to the top of the inclined ramp of the adjacent recess;
Claim 5
Dependent Claim
10 words
an immobile casing extending upwardly from said mobile drilling head;
Claim 6
Dependent Claim
10 words
an immobile casing extending upwardly from said mobile drilling head;
Claim 7
Dependent Claim
25 words
Apparatus as claimed in claim 1, wherein the castellated member is rigidly attached to a means for locking the castellated member on the grooved rod.
Claim 8
Dependent Claim
98 words
Drilling apparatus comprising: a. a mobile drilling head having bearing recesses in its inner wall; b. an immobile casing extending upwardly from said mobile drilling head; c. a drilling bit; d. a pipe string rigidly connected to said drilling bit and extending upwardly through said immobile casing e. means for coupling the upper portion of said immobile casing to said pipe string; f. a plurality of retractable arms mounted on said drilling bit in a position to cooperate with corresponding bearing recesses in said mobile drilling head to rigidly connect said mobile drilling head to said drilling bit.
Claim 9
Dependent Claim
98 words
Drilling apparatus comprising: a. a mobile drilling head having bearing recesses in its inner wall; b. an immobile casing extending upwardly from said mobile drilling head; c. a drilling bit; d. a pipe string rigidly connected to said drilling bit and extending upwardly through said immobile casing e. means for coupling the upper portion of said immobile casing to said pipe string; f. a plurality of retractable arms mounted on said drilling bit in a position to cooperate with corresponding bearing recesses in said mobile drilling head to rigidly connect said mobile drilling head to said drilling bit.
Claim 10
Dependent Claim
17 words
a pipe string rigidly connected to said drilling bit and extending upwardly through said immobile casing; and
Claim 11
Dependent Claim
17 words
a pipe string rigidly connected to said drilling bit and extending upwardly through said immobile casing; and
Claim 12
Dependent Claim
79 words
Drilling apparatus as recited in claim 3 comprising a. an annular member rigidly connected to said mobile drilling head and extending for a short distance upwardly therefrom around said casing; b. a first ball bearing mounted in a first sealing positioned between said casing and said mobile drilling head; c. a second ball bearing mounted in a second sealing positioned between said casing and said annular member; and d. means of fluid communication connecting said first and second sealings.
Claim 13
Dependent Claim
28 words
Drilling apparatus as recited in claim 3 wherein said casing has at least one recess on the upper outer portion thereof for the attachment of a base plate.
Claim 14
Dependent Claim
96 words
means for coupling the upper portion of said immobile casing to said pipe string, said means for coupling the upper portion of said immobile casing to said pipe string comprise: a. an annular assembly surrounding said casing and b. a vertical adjustment means comprising i. a threaded pipe; ii. means for integrally connecting said threaded pipe to the upper end of said pipe string; iii. a castellated member supported by said threaded pipe; and iv. a threaded member which is threaded on said threaded pipe, attached to said castellated member, and attached to said annular assembly.
Claim 15
Dependent Claim
96 words
means for coupling the upper portion of said immobile casing to said pipe string, said means for coupling the upper portion of said immobile casing to said pipe string comprise: a. an annular assembly surrounding said casing and b. a vertical adjustment means comprising i. a threaded pipe; ii. means for integrally connecting said threaded pipe to the upper end of said pipe string; iii. a castellated member supported by said threaded pipe; and iv. a threaded member which is threaded on said threaded pipe, attached to said castellated member, and attached to said annular assembly.
Claim 16
Dependent Claim
89 words
Drilling apparatus as recited in claim 3 wherein said means for coupling the upper portion of said immobile casing to said pipe string comprise: a. an annular assembly surrounding saiD casing and b. a vertical adjustment means comprising i. a threaded pipe; ii. means for integrally connecting said threaded pipe to the upper end said pipe string; iii. a castellated member supported by said threaded pipe; and iv. a threaded member which is threaded on said threaded pipe, attached to said castellated member, and attached to said annular assembly.
Claim 17
Dependent Claim
22 words
Drilling apparatus as recited in claim 6 wherein said threaded pipe has longitudinal grooves to receive the castellations on said castellated member.
Claim 18
Dependent Claim
21 words
Drilling apparatus as recited in claim 6 wherein said threaded member is attached to said castellated member by means of bolts.
Claim 19
Dependent Claim
3 words
Drilling apparatus comprising:
Claim 20
Dependent Claim
3 words
Drilling apparatus comprising:
Claim 21
Dependent Claim
81 words
Drilling apparatus as recited in claim 9 and further comprising: a. an annular member rigidly connected to said mobile driling head and extending for a short distance upwardly therefrom around said casing; b. a first ball bearing mounted in a first sealing positioned between said casing and said mobile drilling head; c. a second ball bearing mounted in a second sealing positioned between said casing and said annular member; and d. means of fluid communication connecting said first and second sealings.
Claim 22
Dependent Claim
22 words
Drilling apparatus as recited in claim 9 wherein said threaded pipe has longitudinal grooves to receive the castellations on said castellated member.
Claim 23
Dependent Claim
21 words
Drilling apparatus as recited in claim 9 wherein said threaded member is attached to said castellated member by means of bolts.
Claim 24
Dependent Claim
28 words
Drilling apparatus as recited in claim 9 wherein said casing has at least one recess on the upper outer portion thereof for the attachment of a base plate.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |