Manually rotatable tool
A degradation assembly comprises a rotary portion and a stationary portion. The rotary portion includes a cemented metal bolster bonded to a tip. The tip comprises a symmetric, substantially conically shaped tip formed of diamond and a cemented metal carbide substrate. The stationary portion comprises a holder configured to be coupled to a block mounted to a driving mechanism. A compressible element is disposed intermediate, or between, and in mechanical contact with both the rotary portion and the stationary portion.
1. A degradation tool assembly, comprising:
a rotary portion comprising:
a bolster and an impact tip bonded to the bolster;
a shield having a recess;
a stationary portion comprising:
a block adapted to couple to the rotary portion and further adapted to couple to a drive mechanism;
a shank having a first end, the recess of the shield being rotatably connected to the first end of the shank, and a second end spaced apart from the first end, the second end of the shank adapted to be secured within the block; and
a compressible element disposed between and in mechanical contact with the rotary portion and the stationary portion, the rotary portion and the stationary portion compressing the compressible element sufficiently to prevent free rotation of the rotary portion relative to the stationary portion during a degradation operation.
2. The degradation tool assembly of claim 1 , wherein the compressible element is an O-ring under 20 percent to 40 percent compression.
3. The degradation tool assembly of claim 1 , wherein the compressible element is an O-ring of 70 durometers to 90 durometers.
4. The degradation tool assembly of claim 1 , wherein the compressible element is an O-ring.
5. The degradation tool assembly of claim 1 , wherein the compressible element is a seal that retains lubricant between the rotating portion and the stationary portion.
6. The degradation tool assembly of claim 1 , wherein the rotary portion has a puller attachment.
7. The degradation tool assembly of claim 1 , wherein the rotary portion has a wrench flat.
8. The degradation tool assembly of claim 1 , wherein the compressible element includes at least one rubber ball disposed in a cavity between the stationary portion and the rotary portion.
9. The degradation tool assembly of claim 1 , wherein the compressible element is a non-round spring clip.
10. The degradation tool assembly of claim 9 , wherein the spring clip has at least one substantially flat surface.
11. The degradation tool assembly of claim 1 , wherein the stationary portion includes a holder.
12. The degradation tool assembly of claim 1 , wherein the assembly further comprises a back-up adjacent to the O-ring.
13. A degradation tool assembly, comprising:
a rotary portion comprising a bolster and an impact tip bonded to the bolster;
a stationary portion comprising a block adapted to couple to the rotary portion and further adapted to couple to a drive mechanism; and
a compressible element disposed between and in mechanical contact with the rotary portion and the stationary portion, the rotary portion and the stationary portion compressing the compressible element sufficient to prevent free rotation of the rotary portion relative to the stationary portion during a degradation operation;
wherein the compressible element is comprised of a first rubber compressible element disposed on the stationary portion and a second rubber compressible element disposed on the rotary portion, the first rubber compressible element being in contact with the second rubber compressible element.