Smart drilling motor stator

Patent metadata

Field	Value
Publication number	US-11371503-B2
Application number	US-201916716362-A
Country	US
Kind code	B2
Filing date	Dec 16, 2019
Priority date	Dec 16, 2019
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

A drilling motor system for drilling a subterranean well includes a stator tube, the stator tube being an elongated tubular member with a central stator bore. A stator elastomer layer is located within the central stator bore, lining a wall of the central stator bore. The stator elastomer layer has an elastomer bore that includes a plurality of stator lobes extending in a helical pattern along an axial length of the central bore. A rotor is located within the elastomer bore, the rotor being an elongated member that includes a plurality of rotor lobes extending in a helical pattern along an axial length of the rotor. The stator elastomer layer includes a failure detection system, the failure detection system operable to identify a region of damaged stator elastomer layer.

First claim

What is claimed is:

1. A drilling motor system for drilling a subterranean well, the system including:
a stator tube, the stator tube being an elongated tubular member with a central stator bore;
a stator elastomer layer, the stator elastomer layer located within the central stator bore and lining a wall of the central stator bore, the stator elastomer layer having an elastomer bore that includes a plurality of stator lobes extending in a helical pattern along an axial length of the central bore;
a rotor located within the elastomer bore, the rotor being an elongated member that includes a plurality of rotor lobes extending in a helical pattern along an axial length of the rotor; and
where the stator elastomer layer is a dyed elastomer material, where the dyed elastomer material is formed of two or more color codes, each color code being located along a separate portion of the axial length of the stator elastomer layer forming a failure detection system operable to identify a region of damaged stator elastomer layer.

2. The system of claim 1 , where the failure detection system further includes a plurality of sensors, the plurality of sensors spaced axially within the stator elastomer layer.

3. The system of claim 2 , where the failure detection system includes a communication system with a central unit that is operable to transmit a status of each of the plurality of sensors.

4. The system of claim 3 , where the communication system is operable to activate the central unit to deliver the status of each of the plurality of sensors.

5. The system of claim 3 , where the communication system includes a timer operable to activate and deactivate the central unit.

6. A drilling motor system for drilling a subterranean well, the system including:
a stator tube, the stator tube being an elongated tubular member with a central stator bore;
a top sub secured to an uphole end of the stator tube, the top sub connected to a drilling string;
a stator elastomer layer, the stator elastomer layer located within the central stator bore and lining a wall of the central stator bore, the stator elastomer layer having an elastomer bore that includes a plurality of stator lobes extending in a helical pattern along an axial length of the central stator bore, and where the stator elastomer layer is a dyed elastomer material, where the dyed elastomer material is formed of two or more color codes, each color code being located along a separate portion of the axial length of the stator elastomer layer forming a failure detection system operable to identify a region of damaged stator elastomer layer;
a rotor located within the elastomer bore, the rotor being an elongated member that includes a plurality of rotor lobes extending in a helical pattern along an axial length of the rotor;
a transmission assembly, the transmission assembly rotationally secured between the rotor and a drill bit drive shaft; and
a bottom sub secured downhole of the stator tube, the bottom sub housing the drill bit drive shaft and a bearing assembly.

7. The system of claim 6 , where the failure detection system further includes a plurality of sensors, the plurality of sensors spaced axially within the stator elastomer layer.

8. A method for drilling a subterranean well with a drilling motor system, the method including:
providing the drilling motor system having:
a stator tube, the stator tube being an elongated tubular member with a central stator bore;
a stator elastomer layer, the stator elastomer layer located within the central stator bore and lining a wall of the central stator bore, the stator elastomer layer having an elastomer bore that includes a plurality of stator lobes extending in a helical pattern along an axial length of the central stator bore, where the stator elastomer layer is a dyed elastomer material, and where the dyed elastomer material is formed of two or more color codes, each color code being located along a separate portion of the axial length of the stator elastomer layer, forming a failure detection system; and
a rotor located within the elastomer bore, the rotor being an elongated member that includes a plurality of rotor lobes extending in a helical pattern along an axial length of the rotor; and

identifying a region of damaged stator elastomer layer with the failure detection system; where
identifying the region of damaged stator elastomer layer with the failure detection system includes identifying the region of damaged stator elastomer layer with the dyed elastomer material that forms the stator elastomer layer.

9. The method of claim 8 , where identifying the region of damaged stator elastomer layer with the failure detection system further includes identifying the region of damaged stator elastomer layer with a plurality of sensors, the plurality of sensors spaced axially within the stator elastomer layer.

10. The method of claim 9 , further including transmitting a status of each of the plurality of sensors with a communication system with a central unit.

11. The method of claim 10 , further including activating the central unit with the communication system to deliver the status of each of the plurality of sensors.

12. The method of claim 10 , further including activating and deactivating the central unit with a timer of the communication system.

Assignees

• Saudi Arabian Oil Co

Inventors

• Costa De Oliveira Victor Carlos

Classifications

• F04C13/008

  Pumps for submersible use, i.e. down-hole pumping · CPC title

• F04C2230/60

  Assembly methods · CPC title

• F04C2270/86

  Detection · CPC title

• F04C2/1071

  the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type · CPC title

• F04C2240/10

  Stators · CPC title