Casing exit systems

Features:

1. Mechanical retrievable system tagging the bottom.
2. Shipped with single slip mechanical anchor. Anchor design allows retrieving whipstock from the well if necessary.
3. After anchor is activated the “back” of whipstock is pressed against casing wall which eliminates possible complications when milling “window” in case of incorrect orientation of the whipstock (further drilling with inclination angle drop).

Features:

1. Mechanical retrievable system no tagging the bottom.
2. Shipped with mechanical packer device providing isolation below and above the packer space (withstands excess pressure 350atm).
3. Reduces time consumption for well preparation (no need of cement bridge, WOC, etc.).
4. Whipstock orientation using mud pulse MWD (without bypass in BHA).

Features:

1. Hydraulic non-retrievable system no tagging the bottom.
2. Shipped with hydraulic pipe anchor JGT. This type of anchors has simple design but provides reliable fixation excluding axial and tangential displacements because of high shearing resistance due to large operating surface.

Features:

1. Hydraulic retrievable system no tagging the bottom.
2. Shipped with hydraulic packer ensuring isolation below and above packer space (withstands excess pressure 350atm)
3. Reduces time consumption for well preparation (no need of cement bridge, WOC, etc.).

Features:

1. Mechanical retrievable system tagging the bottom.
2. Shipped with three slip mechanical anchor. Anchor design allows retrieving whipstock from the well if necessary.

Due to the fact that deposits (paraffin, scale, etc.) formed during the operation of the well that prevent passage of a full-sized BHA to the TD, BURINTEKH, based on the experience of casing exits (more than 5000 cut out “windows” over 12 years), recommends preparing the wellbore before tripping whipstock.

All Overhead Hydro systems are supplied with PO type pressure sub designed for performing necessary reamings and flushings, cleaning drilling tool inner cavity from dirt and scale, and circulating sub KOPSH for performing backwash before milling window in casing.

Casing exit system KF form milling window and sidetracking per two runs.

Features:

The use of this system is most appropriate in wells with a high dogleg severity. Scope of supply consist of:

1. Mechanical anchor – for mounting whipstock in casing tagging the bottom.
2. Whipstock – for ensuring necessary deviation of milling tools from main bore axis when milling window.
3. Kickoff mill – for mounting whipstock in well and preliminary milling.
4. Window mill – for finish milling window in casing and sidetracking.
5. Watermelon mill – for reaming and gaging walls in milled window.
6. Retrieving hook – for retrieving whipstock and anchor from well if necessary.

Casing exit systems using specially designed window mills

Features:

1. Due to the special design there is no dead point on the window mill thus reducing the likelihood of loss of penetration when milling the window.
2. Ability to eliminate the need of including watermelon mill“FR-4” to BHA because window mill OD is equal to watermelon mill FR-4 diameter.