US3771597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid system for moving subsurface well equipment in well tubing
Assignee: CAMCO INC US
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Filing: 1972-09-11
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Granted: 1973-11-13
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Expires: 1992-09-11
Abstract
Abstract A fluid system for running and retrieving subsurface well equipment in a well tubing by fluid flow through an upper entrance tubing. The upper entrance tubing includes curved portions and includes first and second conduits of different sizes. Both of the conduits have an inside diameter greater than the inside diameter of the well tubing with the first size conduit being larger than the second size conduit and being positioned in the upper tubing at curved portions of the upper tubing to allow passage of lengthy well equipment through the upper entrance tubing. First and second locomotives having an outside diameter substantially equal to the inside diameter of the second size conduit, and a third locomotive having an outside diameter substantially equal to the inside diameter of the well tubing and releasably connected to the other locomotives for being carried to and moved in the well tubing in response to fluid flow. The locomotives being spaced from each other whereby one of the locomotives will always be in a conduit of a size corresponding to the one locomotive to provide movement of the locomotives by fluid through the tubing. The first size conduit including elbows with the first and second locomotives spaced from each other a distance greater than the axial extent of said elbows.
Inventors
- 👤 H Mcgowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:06
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/08; E21B23/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
In an apparatus for runnign and retrieving subsurface well equipment in a well tubing by fluid flow through an upper tubing connected to the upper end of the well tubing, the improvement comprising, said upper tubing having first and second conduits of different sizes, and both of said conduits having an inside diameter greater than the inside diameter of the well tubing, the first size conduit being larger than the second size conduit, and being positioned in the upper tubing at curved portions of the upper tubing and said second size conduit being positioned in straight portions of said upper tubing.
Claim 2
Dependent Claim
101 words
In an apparatus for runnign and retrieving subsurface well equipment in a well tubing by fluid flow through an upper tubing connected to the upper end of the well tubing, the improvement comprising, said upper tubing having first and second conduits of different sizes, and both of said conduits having an inside diameter greater than the inside diameter of the well tubing, the first size conduit being larger than the second size conduit, and being positioned in the upper tubing at curved portions of the upper tubing and said second size conduit being positioned in straight portions of said upper tubing.
Claim 3
Dependent Claim
52 words
The apparatus of claim 1 including, a retaining nipple in the tubing for retaining a large locomotive but allowing the passage of a small locomotive into the well tubing, and a fluid bypass upstream of said retaining nipple for allowing fluid to bypass a large locomotive positioned upstream of the retaining nipple.
Claim 4
Independent Claim
175 words
An apparatus for running and retrieving subsurface well equipment in a well tubing by fluid flow through an upper tubing having curved and straight portions connected to the upper end of the well tubing comprising, said upper tubing having first and second conduits of different sizes and both sized conduits having an inside diameter greater than the inside diameter of the well tubing, the first size conduit being larger than the second size conduit and being positioned in the upper tubing at curved portions of said upper tubing, first and second locomotives having an outside diameter substantially equal to the inside diameter of the second size conduit, a third locomotive having an outside diameter substantially equal to the inside diameter of the well tubing and releasably connected to said other locomotives for movement in the well tubing in response to fluid flow, and said locomotives spaced from each other whereby one of the locomotives will always be in a conduit of a size corresponding to the locomotives for movement of the locomotives through the tubings.
Claim 5
Independent Claim
175 words
An apparatus for running and retrieving subsurface well equipment in a well tubing by fluid flow through an upper tubing having curved and straight portions connected to the upper end of the well tubing comprising, said upper tubing having first and second conduits of different sizes and both sized conduits having an inside diameter greater than the inside diameter of the well tubing, the first size conduit being larger than the second size conduit and being positioned in the upper tubing at curved portions of said upper tubing, first and second locomotives having an outside diameter substantially equal to the inside diameter of the second size conduit, a third locomotive having an outside diameter substantially equal to the inside diameter of the well tubing and releasably connected to said other locomotives for movement in the well tubing in response to fluid flow, and said locomotives spaced from each other whereby one of the locomotives will always be in a conduit of a size corresponding to the locomotives for movement of the locomotives through the tubings.
Claim 6
Dependent Claim
33 words
The apparatus of claim 3 wherein the first sized conduit includes elbows and the first and second locomotives are spaced from each other a distance greater than the axial extent of said elbows.
Claim 7
Dependent Claim
53 words
The apparatus of claim 3 including, a fourth locomotive having an outside diameter substantially equal to the inside diameter of the well tubing and connected to the third locomotive, but spaced from the third locomotive a distance sufficient for the third and fourth locomotives to pass by any mandrels in the well tubing.
Claim 8
Dependent Claim
28 words
The apparatus of claim 3 wherein the well tubing is 2 inch conduit, the first conduit is 4 inch conduit, and the second conduit is 3 inch conduit.
Claim 9
Independent Claim
168 words
An apparatus for running and retrieving subsurface well equipment in a well tubing by fluid flow through an upper tubing having curved and straight portions connected to the upper end of the well tubing comprising, said upper tubing having first and second conduits of different sizes and both sized conduits having an inside diameter greater than the inside diameter of the well tubing, the first size conduit being larger than the second size conduit and being positioned in the upper tubing as elbows at curved portions of said upper tubing, first and second locomotives having an outside diameter substantially equal to the inside diameter of the second size conduit, said first and second locomotives being connected together but spaced from each other a distance greater than the axial extent of said elbows, and a third locomotive having an outside diameter substantially equal to the inside diameter of the well tubing releasably connected to said other locomOtives for movement in the well tubing in response to said fluid flow.
Claim 10
Independent Claim
168 words
An apparatus for running and retrieving subsurface well equipment in a well tubing by fluid flow through an upper tubing having curved and straight portions connected to the upper end of the well tubing comprising, said upper tubing having first and second conduits of different sizes and both sized conduits having an inside diameter greater than the inside diameter of the well tubing, the first size conduit being larger than the second size conduit and being positioned in the upper tubing as elbows at curved portions of said upper tubing, first and second locomotives having an outside diameter substantially equal to the inside diameter of the second size conduit, said first and second locomotives being connected together but spaced from each other a distance greater than the axial extent of said elbows, and a third locomotive having an outside diameter substantially equal to the inside diameter of the well tubing releasably connected to said other locomOtives for movement in the well tubing in response to said fluid flow.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |