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US 2011/0031020 A1Published application
Wellbore percussion adapter and tubular connection
AssigneeBbj Tools Inc.
InventorBRADLEY R. COTE
Life of this patent
Estimating the term…
Abstract
A percussion adapter that is driven to generate a percussive axial motion on a wellbore structure. One percussion adapter includes a drive connection to mechanically convert rotational drive to axially directed percussive motion. Another percussion adapter employs a valve that creates back pressure causing axially directed percussive motion. A wellbore tubular connection is also disclosed that transitions torque to resist back off when left hand or right hand torque is applied.
Claims62
A method for accelerating the drilling penetration of a rotary driven drill bit, the method comprising:
- providing a positive displacement motor including a motor housing, a fluid discharge and a rotor powered by fluid pressure;
- providing a drill bit;
- providing a drilling accelerator including a housing and a drive connection to mechanically convert rotational drive to axially directed percussive motion;
- connecting the drilling accelerator below the motor including connecting the housing to move with the motor housing, connecting the drive connection to be driven rotationally by the rotor and bringing the fluid passage into communication with the fluid discharge;
- connecting the drill bit below the drilling accelerator with the drive connection in drive communication with the drill bit;
- pumping fluid through the motor to drive the rotor and the drive connection to rotate and to generate axial percussive motion which is communicated from the drive connection to the drill bit and;
- discharging fluid from the fluid discharge to pass through the drilling accelerator and the drill bit.
4 more elements
A drilling accelerator comprising:
- a housing including an upper end and a lower end;
- a drive connection including an upper axially rotatable drive shaft for receiving an input of rotational motion, a rotational to axial mechanical drive converter in communication with the upper axially rotatable drive shaft for converting the input of rotational motion to an axial sliding motion;
- a lower longitudinally moveable drive shaft in communication with the rotational to axial mechanical drive converter to receive the axial sliding motion from the rotational to axial mechanical drive converter and a lower drill bit installation site connected to the lower longitudinally moveable drive shaft for receiving the axial sliding motion and capable of conveying axial percussive motion there through, the lower drill bit installation site telescopically mounted adjacent the lower end of the housing and slidably moveable relative thereto.
A wellbore string tubular connection comprising:
- a first tubular including a first threaded pin end with a right hand thread form and a protrusion extending from its pin end face to create a stepped region thereon, a second tubular including a second threaded pin end with a left hand thread form and a recess on its pin end face forming a shoulder sized to accept the stepped region of the first pin end seated thereagainst, and a collar including a first threaded box with a first selected thread form selected to threadedly engage the right hand thread form of the first threaded pin end and a second threaded box with a second thread form selected to threadedly engage the left hand thread form of the second threaded pin end.
A method for making up a wellbore connection, the method comprising:
- providing a first wellbore tubular with a threaded pin end and an tooth extending from a pin end face thereof, a second tubular with a threaded pin end and recess in a pin end face thereof, the recess sized to accept the tooth of the first wellbore tubular and a collar including a first threaded box end and an opposite threaded box end;
- aligning the first wellbore tubular and the second wellbore tubular to be threaded into the box ends of the collar and with the tooth aligned with the recess and rotating the collar about its long axis to engage the threaded pin ends of the first wellbore tubular and the second wellbore tubular and draw the threaded pin ends into the collar.
A method for applying an axially directed percussive force to a wellbore structure, the method comprising:
- running into a wellbore with a string including (i) a positive displacement motor including a motor housing, a fluid discharge and a rotor powered by fluid pressure;
- (ii) a percussion adapter including a housing and a drive connection to mechanically convert rotational drive to axially directed percussive motion;
- and (iii) a wellbore structure, the percussion adapter being connected below the motor such that the housing moves with the motor housing, the drive connection is driven rotationally by the rotor and the fluid passage is in communication with the fluid discharge and the wellbore structure being connected below the percussion adapter with the drive connection in drive communication with the wellbore structure;
- pumping fluid through the motor to drive the rotor and the drive connection to rotate and to generate axial percussive motion which is communicated from the drive connection to the wellbore structure and;
- discharging fluid from the fluid discharge to pass through the percussion adapter toward the wellbore structure.
2 more elements
A percussion adapter comprising:
- a housing including an upper end and a lower end;
- a drive connection including an upper axially rotatable drive shaft for receiving an input of rotational motion, a rotational to axial mechanical drive converter in communication with the upper axially rotatable drive shaft for converting the input of rotational motion to an axial sliding motion;
- a lower longitudinally moveable drive shaft in communication with the rotational to axial mechanical drive converter to receive the axial sliding motion from the rotational to axial mechanical drive converter and a base end of the lower longitudinally moveable drive shaft for receiving the axial sliding motion and capable of conveying axial percussive motion there through, the base end mounted adjacent the lower end of the housing and slidably moveable relative thereto.
A wellbore drilling percussion adapter comprising:
- an upper housing;
- a fluid flow channel extending from the upper end to the lower end of the upper housing, the first fluid flow channel including a fluid entry end opening adjacent the upper end and a fluid exit adjacent the lower end;
- a lower housing telescopically installed for axially sliding motion relative to the lower end of the upper housing;
- a second fluid flow channel extending from an inlet end open at the upper end to a discharge end opening at the lower end of the lower housing, the inlet end being in fluid communication with the outlet end of the first fluid flow channel;
- an axial drive generator positioned to act with fluid flow through the first fluid flow channel and the second fluid flow channel and including a valve and a pressure chamber adjacent the valve, the valve being closeable to create a force in the pressure chamber to drive the upper housing axially away from the lower housing and the valve being openable to release pressure from the pressure chamber such that the upper housing can be forced down against the lower housing to create a hammering effect against the lower housing.
2 more elements
A method for applying a vibratory force to a downhole string, the method comprising:
- providing a wellbore string with a percussion adapter installed therein, a fluid supply to the percussion adapter and a drill bit installed below the percussion adapter;
- positioning the bottom hole assembly relative to a formation to drill a wellbore;
- pumping fluid through the percussion adapter to generate axial percussive motion by generating a back pressure causing an upper housing of the percussion adapter to lift away from and a lower portion of the percussion adapter and releasing the back pressure to allow the upper housing to drop onto the lower portion to create a percussive force, the percussive force being communicated to the wellbore string to create a vibration therein and;
- discharging fluid from the percussion adapter to continue to pass through the wellbore string.
1 more element
Dependencies are inferred from the claim text.