Present invention relates to the manufacture of any type of stabilizer for use in the rotary drilling of oil wells when the stabilizer is made of non-magnetic metals, more specifically Nitronic 60 and/or Nitronic. sup. 2 50 having wear resistant and anti-galling characteristics.
Method Of Inhibiting Differential Wall Sticking In The Rotary Drilling Of Hydrocarbon Wells
A method of inhibiting the occurrence of differential wall sticking in the rotary drilling of hydrocarbon wells is provided. The yield point of the drilling fluid is measured and if necessary increased in a known manner to a minimum value computed from the weight of the drilling fluid so that solid, substantially spherical glass beads having a specific gravity between 2. 4 and 2. 65, a diameter between 9. 84 and 187 mils, and a hardness of 5. 5 Mohs placed therein will not settle, and 10 to 50 ppg of the glass beads are added to a quantity of the drilling fluid. A slug of the glass beads/drilling fluid mixture is then spotted in the well bore adjacent a previously identified zone of possible sticking, so that a substantial number of the glass beads may be deposited in the filter cake lining the well bore adjacent the zone of possible sticking. The presence of the glass beads inhibits the formation of a seal between a drill string, down hole tool or casing and the filter cake, which seal is necessary for the occurrence of differential wall sticking. In an alternative method, the glass beads/drilling fluid mixture is pumped into the well bore without identifying zones of possible sticking.
Vernon T. Richey - Houston TX Edward L. Moses - Houston TX
International Classification:
E21B 1710 F16C 126
US Classification:
175325
Abstract:
A releasable drill string stabilizer is provided which includes a stabilizer body, a pair of end caps mounted with said body and a pair of clamping wedges positioned relative to the end caps and stabilizer body to clamp the stabilizer to a suitable drill string in various desired locations. A pin means and retainer slot means is provided for connecting the body and wedges relative to each other to prevent movement of such elements relative to each other and the drill string.
CALIBRE EQUIPMENT USA, LLC Support Activities For Oil & Gas Operations
400 Aviation Plz, Hot Springs, AR 71913 124 W Capitol Ave SUITE 1900, Little Rock, AR 72201 1667 K St NW STE 1230, Washington, DC 20006 1155 Dairy Ashford SUITE 402, Houston, TX 77079 202 223-4401, 202 223-4406