US3247914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Completion of wells
Assignee: Vetco Gray LLC
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Filing: 1962-10-02
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Granted: 1966-04-26
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Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 Slack John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:32
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B17/00; E21B17/10; E21B17/1007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
METHOD OF WELL COMPOSITION COMPRISING THE STEPS OF: (A) MOUNTING A CASING HEAD TO THE UPPER END OF A CASING TO DEFINE THEREBY A FIRST JOINT, THE CASING HEAD HAVING A BOWL FOR RECEIVING A HANGER ASSEMBLY; (B) ALIGNING A DRILLING STRING WITH A DRILL BIT OR THE LIKE AT ITS LOWER END ABOVE THE CASING HEAD; (C) POSITIONING A PROTECTOR ABOUT THE DRILLING STRING WITH ITS LOWER END SUPPORTED BY THE DRILL BIT, THE PROTECTOR HAVING AN UPPER PORTION THEREOF ARRANGED FOR ENGAGEMENT WITH THE CASING HEAD BOWL AND A LOWER PORTION ARRANGED TO EXTEND DOWNWARDLY THROUGH SAID CASING HEAD; (D) LOWERING SAID DRILLING EQUIPMENT THROUGH SAID CASING HEAD TO THEREBY CARRY SAID PROTECTOR DOWNWARDLY ON SAID DRILL BIT FOR SUPPORT BY SAID CASING BOWL, BUT ALLOWING FURTHER DOWNWARD MOVEMENT OF SAID DRILLING STRING FOR DRILLING OR SIMILAR OPERATIONS; (E) AND THEN PERFORMING THE DRILLING OR SIMILAR OPERATIONS WHILE SAID PROTECTOR THEREBY PREVENTS DAMAGE TO SAID CASING HEAD BOWL.
Claim 2
Dependent Claim
160 words
METHOD OF WELL COMPOSITION COMPRISING THE STEPS OF: (A) MOUNTING A CASING HEAD TO THE UPPER END OF A CASING TO DEFINE THEREBY A FIRST JOINT, THE CASING HEAD HAVING A BOWL FOR RECEIVING A HANGER ASSEMBLY; (B) ALIGNING A DRILLING STRING WITH A DRILL BIT OR THE LIKE AT ITS LOWER END ABOVE THE CASING HEAD; (C) POSITIONING A PROTECTOR ABOUT THE DRILLING STRING WITH ITS LOWER END SUPPORTED BY THE DRILL BIT, THE PROTECTOR HAVING AN UPPER PORTION THEREOF ARRANGED FOR ENGAGEMENT WITH THE CASING HEAD BOWL AND A LOWER PORTION ARRANGED TO EXTEND DOWNWARDLY THROUGH SAID CASING HEAD; (D) LOWERING SAID DRILLING EQUIPMENT THROUGH SAID CASING HEAD TO THEREBY CARRY SAID PROTECTOR DOWNWARDLY ON SAID DRILL BIT FOR SUPPORT BY SAID CASING BOWL, BUT ALLOWING FURTHER DOWNWARD MOVEMENT OF SAID DRILLING STRING FOR DRILLING OR SIMILAR OPERATIONS; (E) AND THEN PERFORMING THE DRILLING OR SIMILAR OPERATIONS WHILE SAID PROTECTOR THEREBY PREVENTS DAMAGE TO SAID CASING HEAD BOWL.
Claim 3
Dependent Claim
158 words
FOR USE IN WELL COMPLETION EQUIPMENT INCLUDING A CASING HEAD HAVING SUPPORT MEANS AND A CASING SECURED TO THE LOWER END OF THE CASING HEAD TO DEFINE THEREBY A FIRST JOINT: A PROTECTOR OF GENERALLY TUBULAR CONSTRUCTION, SAID PROTECTOR HAVING AN UPPER PORTION OF ENLARGED OUTER DIAMETER OPERATIVE TO BE SUPPORTED BY SAID CASING HEAD ON SAID SUPPORT MEANS, AND A LOWER PORTION HAVING AN EXTERIOR DIAMETER SUFFICIENT TO PASS THROUGH SAID CASING HEAD BELOW SAID SUPPORT MEANS, THE LONGITUDINAL DISTANCE BETWEEN THE UPPER AND LOWER EXTENT OF SAID LOWER PORTION BEING GREATER THAN THE LONGITUDINAL DISTANCE BETWEEN SAID JOINT AND THE LOWER EXTENT OF SAID SUPPORT MEANS, THE INTERIOR DIAMETER OF SAID PROTECTOR BEING OF A SIZE TO PASS A DRILLING STRING EXCEPT FOR A DRILL BIT, WHEREBY SAID PROTECTOR MAY BE LOWERED VIA A DRILL BIT INTO A SUPPORTED POSITION RELATIVE TO SAID CASING HEAD TO PROTECT SAID SUPPORT MEANS AND SAID FIRST JOINT DRILLING OPERATIONS.
Claim 4
Dependent Claim
158 words
FOR USE IN WELL COMPLETION EQUIPMENT INCLUDING A CASING HEAD HAVING SUPPORT MEANS AND A CASING SECURED TO THE LOWER END OF THE CASING HEAD TO DEFINE THEREBY A FIRST JOINT: A PROTECTOR OF GENERALLY TUBULAR CONSTRUCTION, SAID PROTECTOR HAVING AN UPPER PORTION OF ENLARGED OUTER DIAMETER OPERATIVE TO BE SUPPORTED BY SAID CASING HEAD ON SAID SUPPORT MEANS, AND A LOWER PORTION HAVING AN EXTERIOR DIAMETER SUFFICIENT TO PASS THROUGH SAID CASING HEAD BELOW SAID SUPPORT MEANS, THE LONGITUDINAL DISTANCE BETWEEN THE UPPER AND LOWER EXTENT OF SAID LOWER PORTION BEING GREATER THAN THE LONGITUDINAL DISTANCE BETWEEN SAID JOINT AND THE LOWER EXTENT OF SAID SUPPORT MEANS, THE INTERIOR DIAMETER OF SAID PROTECTOR BEING OF A SIZE TO PASS A DRILLING STRING EXCEPT FOR A DRILL BIT, WHEREBY SAID PROTECTOR MAY BE LOWERED VIA A DRILL BIT INTO A SUPPORTED POSITION RELATIVE TO SAID CASING HEAD TO PROTECT SAID SUPPORT MEANS AND SAID FIRST JOINT DRILLING OPERATIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |