Drill string components having multiple-thread joints

A threaded drill string component, comprising:

• a hollow body having a first end, an opposing second end, and a central axis extending through the hollow body;
• two threads positioned on the first end of the hollow body and having leading ends that are circumferentially spaced 180 degrees apart proximate a leading edge of the first end of the hollow body;
• wherein:
• each of the two threads comprises a plurality of helical turns extending along the first end of the hollow body from a location proximate the leading edge of the first end of the hollow body toward the second end of the hollow body,
• each of the two threads has a thread root, a thread crest, a constant thread pitch, and a thread width,
• each of the two threads has a clearance flank and a pressure flank, the pressure flank being oriented at a negative pressure flank angle,
• the root of each of the two threads circumscribes a cylindrical surface extending the axial length of the plurality of helical turns of the two threads,
• the crest of each of the two threads circumscribes a frusta-conical surface extending over at least a portion of the axial length of the plurality of helical turns of the two threads, and wherein a generatrix of the frusta-conical surface is a straight line that lies at an angle relative to the central axis extending through the hollow body, and
• the leading end of each of the two threads comprises a planar surface that is normal to the hollow body and extends the full thread width to prevent wedging or jamming of the threads.

A threaded drill string component, comprising:

• a hollow body having a first end, an opposing second end, and a central axis extending through the hollow body;
• two threads positioned on the first end of the hollow body and having leading ends that are circumferentially spaced 180 degrees apart proximate a leading edge of the first end of the hollow body;
• wherein:
• each of the two threads comprises a plurality of helical turns extending along the first end of the hollow body from a location proximate the leading edge of the first end of the hollow body toward the second end of the hollow body,
• each of the two threads has a thread root, a thread crest, a constant thread pitch, and a thread width,
• each of the two threads has a clearance flank and a negative pressure flank, the negative pressure flank being oriented at a negative pressure angle from about 20 to about 10 degrees, and
• the leading end of each of the two threads comprises a planar surface that is normal to the hollow body and extends the full thread width to prevent wedging or jamming of the threads.

A threaded drill rod, comprising:

• a body having a box end, an opposing pin end, and a central axis extending through the body;
• two female threads positioned on the box end of the body and having leading ends that are circumferentially spaced 180 degrees apart proximate a leading edge of the box end of the body, the two female threads each having a thread root, a thread crest, a constant thread pitch, and a thread width, wherein each of the two female threads comprises a plurality of helical turns extending along the box end of the body from a location proximate the leading edge of the box end of the body toward the pin end of the body;
• two male threads positioned on the pin end of the body and having leading ends that are spaced 180 degrees apart about a leading edge of the pin end of the body, each male thread having a thread root, a thread crest, a constant thread pitch, and a thread width, wherein each of the two male threads comprises a plurality of helical turns extending along the pin end of the body from a location proximate the leading edge of the pin end of the body toward the box end of the body;
• wherein each of the female threads and each of the male threads has a clearance flank and a pressure flank, the pressure flank being oriented at a negative pressure flank angle, and
• wherein the leading end of each of the female threads and each of the male threads comprises a planar surface that is normal to the hollow body and extends the full thread width to prevent wedging or jamming of the threads.