US4605065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for monitoring well tubing fluid
Assignee: Hughes Tool Co
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Filing: 1985-06-26
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Granted: 1986-08-12
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Expires: 2005-06-26
Abstract
Abstract A method and apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore. The mandrel also has a slot along the length of the side pocket adjacent the main bore, and the exterior surface of the mandrel is free of apertures. A corrosion coupon is mounted within a notch on the side of a carrier, and the carrier is placed into the side pocket for a specified time period. The carrier is oriented to position the coupon within the slot. The carrier is then removed from the well and the coupon is inspected.
Inventors
- 👤 Bolling A. Abercrombie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:37
CPC Classifications
G; G01; G01N; G01N17/00; E; E21; E21B; E21B23/00; E21B23/03; E21B41/00; E21B41/02; E21B47/00; E21B47/006; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
61 words
An apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore, the apparatus comprising: a carrier, mounted in the side pocket; and a coupon secured to the carrier, and positioned within a slot between the main bore and the side pocket.
Claim 2
Independent Claim
61 words
An apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore, the apparatus comprising: a carrier, mounted in the side pocket; and a coupon secured to the carrier, and positioned within a slot between the main bore and the side pocket.
Claim 3
Independent Claim
72 words
An apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore, the apparatus comprising: a carrier, mounted in the side pocket; a coupon, secured to one side of the carrier; and orienting means for orienting the carrier to position the coupon within a slot between the main bore and the side pocket.
Claim 4
Independent Claim
72 words
An apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore, the apparatus comprising: a carrier, mounted in the side pocket; a coupon, secured to one side of the carrier; and orienting means for orienting the carrier to position the coupon within a slot between the main bore and the side pocket.
Claim 5
Independent Claim
74 words
An apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore, the apparatus comprising: a cylindrical carrier, mounted in the side pocket, the carrier having a rectangular notch on one side; and a coupon, secured to the carrier, within the notch, and positioned within a slot between the main bore and the side pocket.
Claim 6
Independent Claim
74 words
An apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore, the apparatus comprising: a cylindrical carrier, mounted in the side pocket, the carrier having a rectangular notch on one side; and a coupon, secured to the carrier, within the notch, and positioned within a slot between the main bore and the side pocket.
Claim 7
Independent Claim
82 words
An apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore, the apparatus comprising: a cylindrical carrier, mounted in the side pocket, the carrier having a rectangular notch on one side; a coupon secured to the carrier, within the notch; and orienting means for orienting the carrier to position the coupon within a slot between the main bore and the side pocket.
Claim 8
Independent Claim
82 words
An apparatus for monitoring corrosive effects of fluid in a well, for use with a well tubing mandrel having a main bore and a side pocket offset from the main bore, the apparatus comprising: a cylindrical carrier, mounted in the side pocket, the carrier having a rectangular notch on one side; a coupon secured to the carrier, within the notch; and orienting means for orienting the carrier to position the coupon within a slot between the main bore and the side pocket.
Claim 9
Independent Claim
89 words
An apparatus for monitoring fluids in a well, comprising: a well tubing mandrel having connection means for connecting the mandrel within well tubing downhole, a main bore, a side pocket offset from the main bore, and a slot along substantially the entire length of the side pocket adjacent to the main bore, wherein the exterior surface of the mandrel is free of apertures; a carrier, mounted in the side pocket; and a coupon secured to the carrier, and positioned within the slot to simulate a section of the tubing.
Claim 10
Independent Claim
89 words
An apparatus for monitoring fluids in a well, comprising: a well tubing mandrel having connection means for connecting the mandrel within well tubing downhole, a main bore, a side pocket offset from the main bore, and a slot along substantially the entire length of the side pocket adjacent to the main bore, wherein the exterior surface of the mandrel is free of apertures; a carrier, mounted in the side pocket; and a coupon secured to the carrier, and positioned within the slot to simulate a section of the tubing.
Claim 11
Independent Claim
90 words
An apparatus for monitoring fluids in a well, comprising: a well tubing mandrel having connection means for connecting the mandrel within well tubing downhole, a main bore, a side pocket offset from the main bore, and a slot along substantially the entire length of the side pocket adjacent to the main bore, wherein the exterior surface of the mandrel is free of apertures; a carrier, mounted in the side pocket; a coupon secured to the carrier; and orienting means for orienting the carrier to position the coupon within the slot.
Claim 12
Independent Claim
90 words
An apparatus for monitoring fluids in a well, comprising: a well tubing mandrel having connection means for connecting the mandrel within well tubing downhole, a main bore, a side pocket offset from the main bore, and a slot along substantially the entire length of the side pocket adjacent to the main bore, wherein the exterior surface of the mandrel is free of apertures; a carrier, mounted in the side pocket; a coupon secured to the carrier; and orienting means for orienting the carrier to position the coupon within the slot.
Claim 13
Independent Claim
102 words
An apparatus for monitoring fluids in a well, comprising: a well tubing mandrel having connection means for connecting the mandrel within well tubing downhole, a main bore, a side pocket offset from the main bore, and a slot along substantially the entire length of the side pocket adjacent to the main bore, wherein the exterior surface of the mandrel is free of apertures; a cylindrical carrier, mounted in the side pocket, the carrier having a rectangular notch on one side; and a coupon secured to the carrier, within the notch, and positioned within the slot to simulate a section of the tubing.
Claim 14
Independent Claim
102 words
An apparatus for monitoring fluids in a well, comprising: a well tubing mandrel having connection means for connecting the mandrel within well tubing downhole, a main bore, a side pocket offset from the main bore, and a slot along substantially the entire length of the side pocket adjacent to the main bore, wherein the exterior surface of the mandrel is free of apertures; a cylindrical carrier, mounted in the side pocket, the carrier having a rectangular notch on one side; and a coupon secured to the carrier, within the notch, and positioned within the slot to simulate a section of the tubing.
Claim 15
Independent Claim
92 words
A method of monitoring fluid within well tubing, comprising the steps of: installing a well tubing mandrel downhole in well tubing, said mandrel having a main bore, a side pocket offset from the main bore, and a slot along the length of the side pocket adjacent the main bore; mounting a coupon on a carrier, said coupon being a strip of selected material; placing the carrier into the side pocket, positioning the coupon within the slot for a specified time period; removing the carrier from the well tubing; and inspecting the coupon.
Claim 16
Independent Claim
92 words
A method of monitoring fluid within well tubing, comprising the steps of: installing a well tubing mandrel downhole in well tubing, said mandrel having a main bore, a side pocket offset from the main bore, and a slot along the length of the side pocket adjacent the main bore; mounting a coupon on a carrier, said coupon being a strip of selected material; placing the carrier into the side pocket, positioning the coupon within the slot for a specified time period; removing the carrier from the well tubing; and inspecting the coupon.
Claim 17
Independent Claim
108 words
A method of monitoring fluid within well tubing, comprising the steps of: installing a well tubing mandrel downhole in well tubing, said mandrel having a main bore, a side pocket offset from the main bore, and a slot along the length of the side pocket adjacent the main bore, the exterior surface of the mandrel being free of apertures; mounting a coupon within a notch on the side of a carrier, said coupon being a strip of selected material; placing the carrier into the side pocket, positioning the coupon within the slot for a specified time period; removing the carrier from the well tubing; and inspecting the coupon.
Claim 18
Independent Claim
108 words
A method of monitoring fluid within well tubing, comprising the steps of: installing a well tubing mandrel downhole in well tubing, said mandrel having a main bore, a side pocket offset from the main bore, and a slot along the length of the side pocket adjacent the main bore, the exterior surface of the mandrel being free of apertures; mounting a coupon within a notch on the side of a carrier, said coupon being a strip of selected material; placing the carrier into the side pocket, positioning the coupon within the slot for a specified time period; removing the carrier from the well tubing; and inspecting the coupon.
Claim 19
Independent Claim
113 words
A method of monitoring fluid within well tubing, comprising the steps of: installing a well tubing mandrel downhole in well tubing, said mandrel having a main bore, a side pocket offset from the main bore, and a slot along the length of the side pocket adjacent the main bore, the exterior surface of the mandrel being free of apertures; mounting a coupon within a notch on the side of a carrier, said coupon being a strip of selected material; placing the carrier into the side pocket for a specified time period, the carrier being oriented to position the coupon within the slot; removing the carrier from the well tubing; and inspecting the coupon.
Claim 20
Independent Claim
113 words
A method of monitoring fluid within well tubing, comprising the steps of: installing a well tubing mandrel downhole in well tubing, said mandrel having a main bore, a side pocket offset from the main bore, and a slot along the length of the side pocket adjacent the main bore, the exterior surface of the mandrel being free of apertures; mounting a coupon within a notch on the side of a carrier, said coupon being a strip of selected material; placing the carrier into the side pocket for a specified time period, the carrier being oriented to position the coupon within the slot; removing the carrier from the well tubing; and inspecting the coupon.
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) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |