Wireless downhole tool positioning system

• US 8,286,702 B2
• Filed: 04/05/2012
• Issued: 10/16/2012
• Est. Priority Date: 09/14/2009
• Status: Active Grant

• Current Assignee: Yellowjacket Oilfield Services, LLC
• Original Assignee: Don Umphries, Gabe Williger
• Inventors: Umphries, Don, Williger, Gabe
• Primary Examiner(s): Neuder, William P
• Assistant Examiner(s): RUNYAN, RONALD R
• Application Number:
  US13/506,212
• Publication Number:
  US 20120211224A1
• Time in Patent Office: 194 Days
• Field of Search: 175/320, 175/321, 166/242.6, 166/242.7, 464/18, 464/182, 403/359.1, 403/359.6, 403/383
• US Class Current: 166/242.6
• CPC Class Codes: E21B 23/00 Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells setting of casings, screens or liners E21B43/10
• CPC Class Codes: E21B 23/01 for anchoring the tools or the like E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18
• CPC Class Codes: E21B 23/02 for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing E21B23/03 - E21B23/06 take precedence
• CPC Class Codes: E21B 43/119 Details, e.g. for locating perforating place or direction

Abstract

A string of drill pipe, for example, is assembled with a severing sub in anticipation of a possible need to cut the string at some point in the operation. The severing sub includes a thin wall tube that links opposite end tool joint bosses. The tin wall tube is easily cut by a shaped charge cutter. Rotary drive torque is transmitted between the sub tool join bosses by a concentric external torque tube having a torque transmitting assembly at each boss. The torque tube connection to the upper boss has an inseparable circumferential shoulder engagement with the boss. The lower boss engagement of the torque tube is axially separable. When the thin wall tube is cut, the upper boss and torque tube is withdrawn from the well with the upper pipe string.

Claims

1. A pipe sub-section having an axially elongated first tube between stepped coupling bosses at opposite ends thereof, said first tube and coupling bosses having an axial flow bore therethrough, said first tube having a first outer diameter that is less than a second outer diameter of a first step on said bosses, a first of said bosses having a second step on an axially opposite side of said first step from said first tube, said first boss second step having a third outer diameter that is greater than said first diameter but less than said second diameter, a second of said bosses having a second step on an axially opposite side of said first step from said first tube having a fourth diameter that is greater than said second diameter, said first boss second step having a plurality of wrench flats formed about the outer perimeter thereof, a first abutment edge between the first and second steps of said second boss being formed to follow an undulated perimeter;

and an axially elongated torque sleeve having an internal bore with an inside diameter corresponding to a slip fit over said first step on said bosses, a first end of said sleeve formed with an undulated perimeter to mesh with said first abutment edge perimeter, a second end of said sleeve having an inside collar around an aperture with internal wrench flats for meshing with said first boss second step.

2. A pipe sub-section as described by claim 1 wherein said undulations are formed as matching lugs and detents.

3. A pipe sub-section as described by claim 1 having a fourth step on said bosses between said first step and said first tube, said fourth step having a fifth outer diameter that is greater than first outer diameter but less than said second outer diameter, second abutment edges between the first and fourth steps of both first and second bosses having an undulated perimeter and a plurality of longitudinal second tube sections having matching end undulations meshed between said second abutment edges to circumscribe said first tube.

4. A pipe sub-section as described by claim 1 having external threads at opposite axial ends thereof, said torque sleeve positioned over said first step of said bosses with said undulated perimeter of said sleeve end meshed with the undulated perimeter of said second boss and the wrench flats of said sleeve collar meshed with the wrench flats of said first boss second step and said sleeve collar compressed between an end of an internal threaded pipe section meshed with external threads of said first boss and an abutment edge of said first boss between said first and second steps.

5. A pipe sub-section as described by claim 3 having external threads at opposite axial ends thereof, said torque sleeve positioned over said first step of said bosses to overlie said second tube sections, the undulated perimeter of said sleeve end meshed with the undulated perimeter of said second boss and the wrench flats of said sleeve collar meshed with the wrench flats of said first boss second step and said sleeve collar compressed between an end of an internal threaded pipe section meshed with external threads of said first boss and an abutment edge of said first boss between said first and second steps.