UP-HOLE SIGNALING DEVICE

• US 3,719,239 A
• Filed: 08/04/1971
• Issued: 03/06/1973
• Est. Priority Date: 08/04/1971
• Status: Expired due to Term

• Current Assignee: Albert P. Richter Jr, James D. Bruner, Percy T. Cox
• Original Assignee: Albert P. Richter Jr, James D. Bruner, Percy T. Cox
• Inventors: Richter, Albert P. Jr., Bruner, James D., Cox, Percy T.
• Primary Examiner(s): Queisser, Richard C.
• Assistant Examiner(s): Beauchamp, John P.
• Application Number:
  US05/169,014
• Time in Patent Office: 580 Days
• Field of Search: 73/151,152 175/40,48,50 166/254,250
• US Class Current: 175/50
• CPC Class Codes: E21B 47/18 through the well fluid , e.g. mud pressure pulse telemetry
• CPC Class Codes: E21B 47/24 by positive mud pulses using a flow restricting valve within the drill pipe

Abstract

In borehole drilling which employs a bit having at least one passage for drilling fluid under pressure, there is apparatus to release a resilient ball that will temporarily block the passage. The blocking will cause a pressure increase that may be observed at the surface.

Claims

1. An illuminating device for a display frame, which comprises an adjustable bracket disposed for engagement with the frame for support thereby, a lamp adjustable relative to said bracket, a flexible conduit connected to said bracket and connected to said lamp to adjustably support same from said bracket, and a rechargeable battery pack electrically connected to the lamp by conductors extending through said conduit to energize said lamp for illuminating the display frame.

2. The invention according to claim 1, wherein said magazine comprises a spring-loaded cylindrical chamber, and said ejecting means comprises a reciprocating plunger.

3. The invention according to claim 2, wherein said plunger moves transversely to said chamber, and said ejecting means also comprises electromagnetic means for actuating said plunger.

4. The invention according to claim 3, wherein said electromagnetic means comprises an armature carried by said plunger, and a coil surrounding said armature.

5. The invention according to claim 4, wherein said ejecting means also comprises an oil-filled chamber for holding said plunger and armature, a spring for biasing said plunger into its retracted position, and means for equalizing the pressure between said oil-filled chamber and the drilling fluid surrounding said retaining means.