Dump bailers

Patent metadata

Field	Value
Publication number	US-11512547-B2
Application number	US-201816611764-A
Country	US
Kind code	B2
Filing date	Dec 14, 2018
Priority date	Dec 14, 2018
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A dump bailer includes a bailer body defining an interior space for conveying cement slurry downhole. A dump release mechanism is operatively connected to the bailer body for releasing cement slurry from the interior space. An agitator is operatively connected to the bailer body for agitating cement slurry in the interior space. In general, in another aspect, the disclosed embodiments relate to a method of delivering cement slurry to a downhole position in a well bore. The method includes a running a bailer downhole in a well bore, wherein cement slurry is housed within the bailer. The method includes agitating the cement slurry within the bailer and releasing the cement slurry from the bailer into the well bore.

First claim

What is claimed is:

1. A dump bailer comprising:
a bailer body defining an interior space for conveying cement slurry downhole;
a dump release mechanism operatively connected to the bailer body for releasing cement slurry from the interior space; and
an agitator operatively connected to the bailer body for agitating cement slurry in the interior space, wherein the agitator includes a paddle mounted for rotation within the interior space, wherein the agitator includes a rotary mechanism operatively connected to the paddle to drive the paddle rotationally within the interior space, wherein the rotary mechanism includes a turbine mounted to the bailer body for being passively driven by well bore fluids passing over the bailer body, wherein the turbine is operatively connected to rotate the paddle within the interior space.

2. A dump bailer comprising:
a bailer body defining an interior space for conveying cement slurry downhole;
a dump release mechanism operatively connected to the bailer body for releasing cement slurry from the interior space; and
an agitator operatively connected to the bailer body for agitating cement slurry in the interior space, wherein the agitator includes a paddle mounted for rotation within the interior space, wherein the agitator includes a rotary mechanism operatively connected to the paddle to drive the paddle rotationally within the interior space, wherein the rotary mechanism includes one or more roller wheels operatively connected to an exterior of the bailer body, wherein the one or more roller wheels are configured to interface between the bailer body and a well casing to mitigate frictional heating of the bailer body, wherein the roller wheels are operatively connected to rotate the paddle within the interior space.

3. A dump bailer comprising:
a bailer body defining an interior space for conveying cement slurry downhole;
a dump release mechanism operatively connected to the bailer body for releasing cement slurry from the interior space; and
an agitator operatively connected to the bailer body for agitating cement slurry in the interior space, wherein the agitator includes a plurality of piezo strips lining an interior surface of the bailer body.

4. A method of delivering cement slurry to a downhole position in a well bore comprising:
running a bailer downhole in a well bore, wherein cement slurry is housed within the bailer;
agitating the cement slurry within the bailer; and
releasing the cement slurry from the bailer into the well bore, wherein agitating includes rotating a paddle within the interior space, wherein rotating the paddle includes driving the paddle with a rotary mechanism, wherein driving the paddle with the rotary mechanism includes using a turbine mounted to the bailer body for being passively driven by well bore fluids passing over the bailer body, wherein the turbine is operatively connected to rotate the paddle within the interior space.

5. The method as recited in claim 4 , wherein agitating includes agitating the cement slurry while the bailer is lodged or stuck in the well bore.

6. The method as recited in claim 4 , wherein releasing the cement slurry includes releasing a dump release mechanism of the bailer.

7. A method of delivering cement slurry to a downhole position in a well bore comprising:
running a bailer downhole in a well bore, wherein cement slurry is housed within the bailer;
agitating the cement slurry within the bailer; and
releasing the cement slurry from the bailer into the well bore, wherein agitating includes rotating a paddle within the interior space, wherein rotating the paddle includes driving the paddle with a rotary mechanism, wherein driving the paddle with the rotary mechanism includes using one or more roller wheels operatively connected to an exterior of the bailer body, wherein the one or more roller wheels are configured to interface between the bailer body and a well casing to mitigate frictional heating of the bailer body, wherein the roller wheels are operatively connected to rotate the paddle within the interior space.

8. The method as recited in claim 7 , wherein agitating includes agitating the cement slurry while the bailer is lodged or stuck in the well bore.

9. The method as recited in claim 7 , wherein releasing the cement slurry includes releasing a dump release mechanism of the bailer.

10. A method of delivering cement slurry to a downhole position in a well bore comprising:
running a bailer downhole in a well bore, wherein cement slurry is housed within the bailer;
agitating the cement slurry within the bailer; and
releasing the cement slurry from the bailer into the well bore, wherein agitating includes vibrating a plurality of piezo strips lining an interior surface of the bailer body.

11. The method as recited in claim 10 , wherein agitating includes agitating the cement slurry while the bailer is lodged or stuck in the well bore.

12. The method as recited in claim 10 , wherein releasing the cement slurry includes releasing a dump release mechanism of the bailer.

Assignees

• Halliburton Energy Services Inc

Inventors

• Chamarthy Pramod
• Wu Qian

Classifications

• E21B33/13

  Methods or devices for cementing, for plugging holes, crevices or the like · CPC title

• E21B27/02 Primary

  Dump bailers, i.e. containers for depositing substances, e.g. cement or acids · CPC title