Underreaming procedures vary from tool to tool. However, it shall be verified that: the tool is function tested with the mud pumps on surface before running in the cutters are secured inside the tool body with a small piece of rope or tape to ensure a safe trip in the hole without damage to the … Underreaming
The main requirement in sidetracking a well is the development of a lateral force to allow the bit to cut on the side of the hole. BHA Geometry The required lateral force shall be provided by the geometry of the BHA. The most effective BHA configuration to achieve a successful sidetrack kick-off is a mud … General Guidelines for Sidetracking
The ‘Window Master’ whipstock is a one trip system to mill afull size hole in casing in the required direction. The whipstock is mechanically set and requires a bridge plug to be set at a suitable depth so that weight can be put down on it to initiate the setting process. Dogleg Severity The dogleg … Sidetracking out of Casing with Whipstock
This article presents the main conversion factors for oil field and SI units. Length/Depth/Distance (SI unit – m) 1 inch (“) = 25.4 mm 1 foot (ft) = 0.3048 m (= 12 inches) 1 nautical mile = 1852 m (= 6080 feet) Velocity (SI unit – m/s) 1 knot = 1.852 km/h (1 knot = … Conversions factors
The Ingram Cactus Exact 15 Universal Slim-hole Drilling and Completion System was specifically developed for use with slim-hole casing designs suitable for installation through small bore BOP stacks (i.e. 7″, 9″ and 11″ through-bore sizes). One of the objectives in designing this system was to preserve all the design features developed in the standard Universal … Ingram Cactus: Exact 15 Universal Slim-hole wellhead system
Main features of the MC2 compact wellhead are described below: Flow through casing hanger with 45 degree shoulders and centralisation feature. “Fastlock” hub and metal/metal “CX” gasket on wellhead connections. Non API shear and bending resistant outlets with parallel thread metal sealing VR plug. 2″ ´ 5000 psi outlets for both upper and lower stages. … Cooper Oil Tools: MC2 compact wellhead
The existence of substantial vibrations in the drillstring have caused much trouble time during drilling in slim (and conventional) holes. Minimising drillstring vibrations during the drilling of slim and conventional holes means that the dynamic components of the loads in the drillstring are reduced, with the following consequences: The peak loads can be reduced reducing … Drill string vibrations
Bits and coreheads cut rock by crushing, shearing, grinding or jetting. Crushing bits are the well known roller cone bits and hammer bits. 1 Crushing bits – roller cone rock bits Crushing bits work by crushing the rock to make an indentation with a tooth and then scouring the rock away with the subsequent tooth … Mechanisms of rock cutting
One of the modifications recommended is to install a mudcooler. This is basically a heat exchanger with interconnections for serial or parallel operation, depending on required mud temperature difference. Seawater is used as cooling medium. The obtained temperature difference is 70 deg F with a maximum flow rate of 250 tons per hour.Although it is … Mud cooler for HPHT wells
Once properly commissioned and tested the Mud Cap Drilling system, drilling can be done the conventional mode until actual circulation losses conditions dictate to switch to Mud Cap Drilling mode. At first, decision could be taken to attempt to control losses with conventional methods. Typically Mud Cap Drilling (MPD, Managed Presure Drilling) mode will start … Operations with Mud Cap Drilling (MPD, Managed Presure Drilling)