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US 10,865,606 B2Granted
Downhole centralizer
AssigneeImpact Selector International, LLC
InventorsJames Patrick Massey, Brandon Martin
Life of this patent
Estimating the term…
Abstract
A downhole centralizer operable to be coupled with a tool string and conveyed within a downhole passage, wherein the downhole passage is a wellbore or a tubular member disposed in the wellbore. The downhole centralizer may have a plurality of arms that are operable to move against a sidewall of the downhole passage to centralize at least a portion of the tool string within the downhole passage, impart an intended force against the sidewall of the downhole passage, and maintain the intended force substantially constant while the tool string is conveyed along the downhole passage and an inner diameter of the downhole passage changes.
Claims24
An apparatus comprising:
- a downhole tool operable to be coupled with a tool string and conveyed within a downhole passage, wherein the downhole passage is a wellbore or a tubular member disposed in the wellbore, and wherein the downhole tool comprises:
- a first support member;
- a second support member;
- and
- a plurality of arms, wherein each arm comprises:
- a first arm member pivotably connected with the first support member via a first pivot joint;
- a second arm member pivotably connected with the second support member via a second pivot joint, wherein for each arm the first and second pivot joints are offset from a plane coinciding with a central axis of the downhole tool, wherein for each arm the first and second pivot joints are azimuthally misaligned around the central axis of the downhole tool, and wherein for each arm the first and second pivot joints are located on a first side of the plane;
- and
- a third pivot joint offset from the plane and located on a second side of the plane.
6 more elements
An apparatus comprising:
- a downhole tool operable to be coupled with a tool string and conveyed within a downhole passage, wherein the downhole passage is a wellbore or a tubular member disposed in the wellbore, and wherein the downhole tool comprises:
- a plurality of arms;
- a first piston operatively connected with the arms and operable to cause the arms to move against a sidewall of the downhole passage to centralize at least a portion of the tool string within the downhole passage when the first piston is moved by hydraulic fluid;
- and
- a second piston operatively connected with the arms, wherein the first and second pistons are operatively connected with each other via a flexible member.
2 more elements
An apparatus comprising:
- a downhole tool operable to be coupled with a tool string and conveyed within a downhole passage, wherein the downhole passage is a wellbore or a tubular member disposed in the wellbore, and wherein the downhole tool comprises:
- a first support member;
- a second support member;
- and
- a plurality of arms, wherein each arm comprises:
- a first arm member pivotably connected with the first support member via a first pivot joint;
- and
- a second arm member pivotably connected with the second support member via a second pivot joint, wherein for each arm the first and second pivot joints are:
- offset from a plane coinciding with a central axis of the downhole tool;
- located on the same side of the plane;
- and
- azimuthally misaligned around the central axis of the downhole tool.
9 more elements
An apparatus comprising:
- a downhole tool operable to be coupled with a tool string and conveyed within a downhole passage, wherein the downhole passage is a wellbore or a tubular member disposed in the wellbore, and wherein the downhole tool comprises:
- a first support member;
- a second support member;
- and
- a plurality of arms, wherein each arm comprises:
- a first arm member pivotably connected with the first support member via a first pivot joint;
- and
- a second arm member pivotably connected with the second support member via a second pivot joint, wherein for each arm:
- the first and second pivot joints are offset from a first plane coinciding with a central axis of the downhole tool;
- the first and second pivot joints are located on the same side of the first plane;
- the first pivot joint is located on a first side of a second plane coinciding with the central axis of the downhole tool;
- and
- the second pivot joint is located on a second side of the second plane opposite the first side of the second plane, wherein the first and second planes extend substantially perpendicularly with respect to each other.
10 more elements
An apparatus comprising:
- a downhole tool operable to be coupled with a tool string and conveyed within a downhole passage, wherein the downhole passage is a wellbore or a tubular member disposed in the wellbore, and wherein the downhole tool comprises:
- a first support member;
- a second support member;
- and
- a plurality of arms, wherein each arm comprises:
- a first arm member pivotably connected with the first support member via a first pivot joint;
- a second arm member pivotably connected with the second support member via a second pivot joint;
- and
- a third pivot joint, wherein for each arm:
- the first and second pivot joints are offset from a first plane coinciding with a central axis of the downhole tool;
- the first and second pivot joints are located on a first side of the first plane;
- the third pivot joint is offset from the first plane and located on a second side of the first plane;
- the first pivot joint is located on a first side of a second plane coinciding with the central axis of the downhole tool;
- and
- the second pivot joint is located on a second side of the second plane opposite the first side of the second plane, wherein the first and second planes extend substantially perpendicularly with respect to each other.
12 more elements
Dependencies are inferred from the claim text.