Whipstock

AGENDA DefinitionComponents Operation Sequence 2

Definition ▹ Whipstock has many applications in Drilling Engineering, one of the most important is Cased Hole Deviation tool “Sidetracking”, 3

Components Whipstock & Anchor Assembly Milling Assembly 4

Whipstock & Anchor Assembly 5 Whipstock body “Guide”, Length: 17.1 Ft Mechanical Anchor Assy.

Anchor Assy. 6 Shipping bolt Safety while Shipping operation to Prevent Setting Dies of Anchor. Shear Screws Detect the Force required to Set the dies. Mechanical Dogs Slips expand against casing side, Prevent Sliding & Rotation

Anchor Assy. ▹ Required Slack off Weight to Set Anchor Slips is designed by numbers of Shear Screw, one Screw: 6630 Lbs. ▹ In deviated wells, Number of Screws should be increased to avoid setting due to drag Force resulted from inclination. Prevent upward movement “Down-Grip”. 7 The weight of String Sets the Anchor and Causes the Slips to expand bracing against casing sides and setting the anchor. ** The Bi-direction Slips Prevent Sliding and Rotation.

Whipstock “Guide” Assy. ▹ A hardened steel ramp along which a mill turns as it cuts a hole in the side of the casing to start a sidetrack. 8 Whipstock “ Guide”

Whipstock “Guide” Assy. ▹ Top of Window *Contain port of Shear pin that Connected “Whipstock” or “guide” with window mill. 9 Port for Shear pin

Whipstock “Guide” Assy. ▹ Space for Fishing / Retrieving Whipstock. 10 Slot for Hook that deployed to Retrieve whipstock. Hook.

Whipstock “Guide” Assy. ▹ Port for Steel bar 11 Port for Steel bar to M/U Whipstock and attach top of Guide with milling Assy. on Rig Floor

Milling Assy. 12 The Silver back mill “The Lead Mill”. The Lower watermelon mill. “The follow mill”. The upper watermelon mill. “The dress mill”

Milling Assy. 13 ToolFunction Sliver back mill The Lead mill Designed to initiated the cutout and mill the window as it slides down the whipstock, it also drills the rat hole. Lower watermelon mill The follow millEngages the casing and elongate the rat hole. Upper watermelon mill The dress mill Removes rough edges around the window.

Operation Sequence 1- Set Bridge Plug, Size depending on CSG Size, 9-5/8”, 7”, …..etc. ** Check CCL Log to avoid setting B.P against Collar. ** Depending on deviation, Check ability of E-Line or Mechanical. 14

Operation Sequence 2- P/U, M/U Whipstock “Guide”, Fix same on R/F by Steel bar. 3- P/U, M/U Milling Assy. BHA, Connect window mill with Whipstock by Shear pin. 15

Operation Sequence 4- The Whipstock Assy. Deployed until it contacts the Bridge Plug. 5- The Required Slack off weight applied to set the anchor and causes slips to expand bracing against the casing sides and setting anchor Assy. 16

Operation Sequence 6- Applied enough weight for Shear Pin, The milling Assy. Detached from the Guide. 7- Start wash and Ream with milling Assy. 17

Operation Sequence 8- The Milling Assy. Moves along the directional line of the guide and cuts the window, Drilling Rat hole. 9- Stop Rotation and Circulation, POOH W/ Milling Assy. 18

Operation Sequence 10- Retrieved Hook is lowered into hole, The hook is oriented and inserted into the Slot of Whipstock. 11- Apply O/P till Shear bolts in the Anchor Slips Assy break, POOH W/ Guide to surface. 19

Operation Sequence 20