Patent US3828852A successfully refreshed from Google Patents.
US3828852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cementing well bore casing
Assignee: Individual
•
Filing: 1973-11-30
•
Granted: 1974-08-13
•
Expires: 1993-11-30
Abstract
Abstract There is disclosed an apparatus for cementing a tubular string in a well bore wherein the tubular string is simultaneously rotated and reciprocated while passing a cementing slurry into the well bore.
Inventors
- 👤 C Delano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:25
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/05; E21B19/00; E21B33/0415; E21B33/10; E21B33/13; E21B33/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
Apparatus for cementing a tubular string in a well bore comprising swivel means having a stationary portion including a fluid inlet and means for attaching the swivel means to hoist means for raising and lowering the apparatus, and a rotatable portion including a fluid outlet in communication with the fluid inlet; a power sub having a conduit, a torque applier for applying torque to the conduit and thereby rotating the same, and means for controlling the torque output of the torque applier; and a cementing sub comprising a conduit and means for launching at least one cementing plug into the tubular string, the power sub conduit and the cementing sub conduit being in torque transmitting relation and in fluid transmitting relation between the swivel fluid outlet and the tubular string.
Claim 2
Dependent Claim
130 words
Apparatus for cementing a tubular string in a well bore comprising swivel means having a stationary portion including a fluid inlet and means for attaching the swivel means to hoist means for raising and lowering the apparatus, and a rotatable portion including a fluid outlet in communication with the fluid inlet; a power sub having a conduit, a torque applier for applying torque to the conduit and thereby rotating the same, and means for controlling the torque output of the torque applier; and a cementing sub comprising a conduit and means for launching at least one cementing plug into the tubular string, the power sub conduit and the cementing sub conduit being in torque transmitting relation and in fluid transmitting relation between the swivel fluid outlet and the tubular string.
Claim 3
Dependent Claim
52 words
The apparatus of claim 1 wherein the power sub conduit is connected in fluid transmitting relation with the swivel fluid outlet and the cementing sub conduit is connected at one end thereof to the power sub conduit and provides means at the other end thereof for securement to the tubular string. 61
Claim 4
Dependent Claim
31 words
The apparatus of claim 1 wherein the swivel means defines an axis of rotation, the power sub conduit and the cementing sub conduit being substantially co-axial with the axis of rotation.
Claim 5
Dependent Claim
23 words
The apparatus of claim 1 wherein the controlling means includes means for controlling the torque output throughout a range of 0-6,000 foot pounds.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |