Granted Patent B1

US 10,280,683 · App. 15/179,571 · Granted May 7, 2019

Inventor: John P. Smid (Houston, TX)

Assignee: National Oilwell DHT, LP

E21B4/003E21B4/02F04C2/1073F04C15/0073F04C15/0076F16B7/042F16D3/205F16D3/2052F16D3/32F16D3/38

Abstract

Claims (29)

1. A mud motor comprising:

a bearing assembly;

a transmission in communication with said bearing assembly having:

an input coupling having a first end in communication with said bearing assembly, a second end with a recessed partial hemisphere disposed therein, and a diameter;

a first torque and thrust transfer coupling having a first end with partial hemisphere, a second end with partial hemisphere, and a diameter;

a first pin connecting said input coupling second end and said first torque and thrust transfer coupling first end wherein said first torque and thrust transfer coupling is adapted to pivotally communicate with said input coupling;

an intermediate shaft having a first end with a recessed partial hemisphere, a second end with a recessed partial hemisphere, and a diameter;

a second pin connecting said first torque and thrust transfer coupling second end and said intermediate shaft having the first end wherein said first torque and thrust transfer coupling is adapted to pivotally communicate with said intermediate shaft;

a second torque and thrust transfer coupling, having a first end with partial hemisphere, a second end with partial hemisphere, and a diameter;

a third pin connecting said intermediate shaft second end and said second torque and thrust transfer coupling said first end wherein said second torque and thrust transfer coupling is adapted to pivotally communicate with said intermediate shaft;

an output coupling having a first end with a recessed partial hemisphere, a second end in communication with a power section, and a diameter; and

a fourth pin connecting said second torque and thrust transfer coupling second end and said output coupling first end wherein said second torque and thrust transfer coupling is adapted to pivotally communicate with said output coupling;

said power section in communication with said transmission;

a rotor catch assembly in communication with said power section; and

a cross over sub-valve in communication with said rotor catch assembly.

2. The mud motor of claim 1 wherein said first pin, said second pin, said third pin, and said fourth pin are double shear catch pins.

3. The mud motor of claim 1 wherein said diameter of said first torque and thrust transfer coupling and said diameter of said second torque and thrust transfer coupling is greater than said diameter of said input coupling.

4. The mud motor of claim 1 wherein said diameter of said first torque and thrust transfer coupling and said diameter of said second torque and thrust transfer coupling is greater than said diameter of said output coupling.

5. The mud motor of claim 1 wherein said diameter of said first torque and thrust transfer coupling and said diameter of said second torque and thrust transfer coupling is greater than said diameter of said intermediate shaft.

6. A transmission for a motor comprising:

an input coupling having a first end, a second end with a recessed partial hemisphere, and a diameter;

a first torque and thrust transfer coupling having a first end with partial hemisphere, a second end with partial hemisphere, and a diameter;

a first pin connecting said input coupling second end and said first torque and thrust transfer coupling first end wherein said first torque and thrust transfer coupling is adapted to pivotally communicate with said input coupling;

an intermediate shaft having a first end with a recessed partial hemisphere, a second end with a recessed partial hemisphere, and a diameter;

a second pin connecting said first torque and thrust transfer coupling second end and said intermediate shaft having the first end wherein said first torque and thrust transfer coupling is adapted to pivotally communicate with said intermediate shaft;

a second torque and thrust transfer coupling, having a first end with partial hemisphere, a second end with partial hemisphere, and a diameter;

a third pin connecting said intermediate shaft second end and said second torque and thrust transfer coupling said first end wherein said second torque and thrust transfer coupling is adapted to pivotally communicate with said intermediate shaft;

an output coupling having a first end with a recessed partial hemisphere, a second end, and a diameter; and

a fourth pin connecting said second torque and thrust transfer coupling second end and said output coupling first end wherein said second torque and thrust transfer coupling is adapted to pivotally communicate with said output coupling.

Assignments (3)

Continuity (1)

Cited By (9)

US 12,208,644 US 12,351,027 US 12,358,367 US 12,421,807 US 12,473,915 US 12,655,688 US 12,655,875 US 12,661,262 US 12,697,249