US3799278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well circulation tool
Assignee: Cities Service Oil Co
•
Filing: 1972-08-31
•
Granted: 1974-03-26
•
Expires: 1992-08-31
Abstract
Abstract A tool for use with a well string to improve circulation of fluid pumped to a well hole. The tubular body section of the tool has a channel for fluid which extends through the side wall to the outside. Inside the body section there is a previously set operable member which covers over the channel and thus blocks the flow of fluid and which can be operated by an action taken at the surface to uncover the channel and permit flow of fluid from the tool into the well hole. Among other uses, the tool can be employed to restore adequate circulation to a bore hole when a bit plugs, or to increase and/or control circulation during the drilling, fishing, or servicing of a hole.
Inventors
- 👤 D Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:47
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/14; E21B34/142; E21B21/00; E21B21/10; E21B21/103
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
170 words
A well drilling tool comprising: a. a tubular body section having threads at each end which are connectible to members of a drilling string, b. a longitudinal passageway through the body section, c. a channel which extends through the side wall of the body section from the passageway therein to the outside, and d. a previously set operable sleeve member inside the body section which normally covers the channel through the wall of the body section and which uncovers the channel when operated, said sleeve member being contiguous with the wall of the passageway in the body section, and slidable in the passageway over and beyond the opening of the channel, e. an integral ring member which projects from the inner surface of the sleeve, is axially aligned therewith, and has a sealing surface which receives a matching sealing surface on a flow obstructing plunger emplaced in the sleeve, and further comprising a snap latch which couples said plunger and said ring when the plunger is emplaced within said sleeve.
Claim 2
Dependent Claim
170 words
A well drilling tool comprising: a. a tubular body section having threads at each end which are connectible to members of a drilling string, b. a longitudinal passageway through the body section, c. a channel which extends through the side wall of the body section from the passageway therein to the outside, and d. a previously set operable sleeve member inside the body section which normally covers the channel through the wall of the body section and which uncovers the channel when operated, said sleeve member being contiguous with the wall of the passageway in the body section, and slidable in the passageway over and beyond the opening of the channel, e. an integral ring member which projects from the inner surface of the sleeve, is axially aligned therewith, and has a sealing surface which receives a matching sealing surface on a flow obstructing plunger emplaced in the sleeve, and further comprising a snap latch which couples said plunger and said ring when the plunger is emplaced within said sleeve.
Claim 3
Dependent Claim
28 words
Apparatus as in claim 1 and further comprising a recess in the passageway of the body section of the tool and the sleeve is located in the recess.
Claim 4
Dependent Claim
14 words
Apparatus as in claim 1 wherein the plunger is gravity actuated into the sleeve.
Claim 5
Dependent Claim
16 words
Apparatus as in claim 1 and further comprising means for retrieving the plunger by wire line.
Claim 6
Dependent Claim
21 words
Apparatus as in claim 1 wherein the channel in the wall of the body section has a removable nozzle inserted therein.
Claim 7
Dependent Claim
58 words
Apparatus as in claim 1 wherein said ring member also has a second surface for engaging said snap latch and whereupon withdrawing the emplaced plunger from said sleeve member the sleeve member first travels upwardly and covers said channel and the snap latch is adapted for disengagement from said ring member upon further upward movement of the plunger.
Claim 8
Dependent Claim
43 words
Apparatus as in claim 1 and further comprising at least one other channel which extends through the wall of the body section of the tool, said other channel being covered by the operable member when preset and uncovered upon operation of the member.
Claim 9
Dependent Claim
27 words
Apparatus as in claim 3 wherein at least one of the channels is projected at an inclined angle with respect to the wall of the body section.
Claim 10
Dependent Claim
28 words
Apparatus as in claim 1 and further comprising a drilling string having a central passageway for fluid affixed to one end of the body section of the tool.
Claim 11
Dependent Claim
63 words
Apparatus as in claim 9 and further comprising another component of a drilling string attached to the other end of the body section of the tool, said other component having discharge orifices for fluid which passes through the string, and wherein the total open channel area is at least equivalent to the total open area of the discharge orifices in the other component.
Claim 12
Dependent Claim
30 words
Apparatus as in claim 1 and including securing means for holding the sleeve in a normal position over the channel in the wall of the body section of the tool.
Claim 13
Dependent Claim
25 words
Apparatus as in claim 11 wherein the securing means comprises at least one O-ring fitted into a groove around the outer circumference of the sleeve.
Claim 14
Dependent Claim
21 words
Apparatus as in Claim 11 wherein the securing means is a tensioned spring which urges the sleeve in an axial direction.
References Cited (Backward Citations)
US2046798A
Cited
US2128352A
Cited
US2312789A
Cited
US2312018A
Cited
US2307658A
Cited
US2596832A
Cited
US2765146A
Cited
US2828107A
Cited
US2882020A
Cited
US3211244A
Cited
US3552412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |