GEOLOGICAL BORING L.L.C.

8" Protector Tube Assy: Steps 1-6
8" Expansion Ring Assy: Steps 7-12


Protector Tube reference part list:
Back Reamer Core (D168 or D222)
Protector Tube (D185)
Pulling Eye
Bolts, 5/8-11 UNC (4 required)
O-Rings, 2-210 (4 required)
Water Jet Nozzles (varies)

b81.jpg (22140 bytes)
Protector Tube

b82.jpg (26773 bytes)
b83.jpg (8421 bytes) b84.jpg (8521 bytes)
b85.jpg (2045 bytes) b86.jpg (2069 bytes) b86.jpg (2069 bytes)
Set screws             O-rings              O-rings


STEP 1: Clean all parts before proceeding with assembly.

STEP 2: Place O-rings (4 places) into counterbores on Protector Tube [Fig 1]. O-rings will seal water passage between Protector Tube and Backeeamer Core.

STEP 3: Align Protector Tube dowel holes with fixed dowels on Backreamer Core and install Protector Tube [Fig 2].

STEP 4: Insert four 5/8” Bolts through the back of the Protector Tube and thread into Backreamer Core [Fig 3]. Torque Bolts to 210 lb-ft.

STEP 5: Install Fluid Nozzles into Backreamer Core [Fig 4] and Protector Tube [Fig 5]. Nozzles may be installed at any time during assembly.

STEP 6: Attach Pulling Eye [Fig 5] using the nut and bolt supplied.




b8f5.jpg (38947 bytes)
Fig. 5

Backreamer and Protector Tube are now assembled.

b8f1.jpg (29052 bytes)
Fig. 1 (O-ring in counterbore)

b8f2.jpg (33721 bytes)
Fig. 2 (Fixed dowels)

b8f3.jpg (85336 bytes)

b8f4.jpg (18448 bytes)

Click here for steps 7 thru 12, 8" EXPANSION RING ASSY

HOME     SONDE HOUSINGS     RAPID-RELEASE COUPLINGS     HEAVY-DUTY SWIVELS     DRILL HEADS   

EXPANDABLE   BACKREAMERS     TECHNICAL TIPS & INSTRUCTIONS     CONTACT US/CUSTOMER SUPPORT

Copyright 1999 Geological Boring L.L.C.  All rights reserved. Revised: April 23, 1999