String Book - Logan Oil Tools

20"
+2 / –0
DriLL coLLar grooveS
for eLevatorS anD SLipS
42"
Ref.
gRooVE DIMEnSIonS BASED on DRILL CoLLAR o. D.
Drill Collar Elev groove C † Slip groove D †
o.D. Ranges Depth A * R (deg) Depth B * (deg)
4 4-5/8 7/32 1/8 4 3/16 3-1/2
4-3/4 5-5/8 1/4 1/8 5 3/16 3-1/2
5-3/4 6-5/8 5/16 1/8 6 1/4 5
6-3/4 8-5/8 3/8 3/16 7-1/2 1/4 5
8-3/4 Larger 7/16 1/4 9 1/4 5
Top Bore
ELEVAtoR BoRES BASED on DRILL CoLLAR o.D.
top Bore * +0 – / Bottom Bore * + / 6 –0
O.D. minus 5/16 O.D. plus 1/8
O.D. minus 3/8 O.D. plus 1/8
O.D. minus 1/2 O.D. plus 1/8
O.D. minus 9/16 O.D. plus 1/8
O.D. minus 5/8 O.D. plus 1/8
* A and B dimensions are from nominal O.D. of new drill collar.
† Angle C and D dimensions are reference and approximate.
NOTE: These dimensions were worked out by an API task group,
but the dimensions are not to be construed as being API standard.
A
16"
+1 / –0
Elevator Groove
O.D. Less 2A
Box End R.
1" Radius Radius (Typ.)
Cold Worked Radius
Drill Collar O.D.
O.D. +1/16" Max.
3"
C
Bottom Bore
3" 18"
+2 / –0
B
Slip Groove
O.D. Less 2B
3"
D
5