Table of Contents
What is a whipstock in drilling?
noun. (Extractive engineering: Field development, Drilling) A whipstock is a curved steel wedge which is put into the borehole to start off the drilling of a new branch. Lateral deflection of the wellbore has been achieved by placing a wedge or whipstock in the well.
What is time drilling in oil and gas?
Oil and gas production is a complex, lengthy and costly process that starts long before the drilling begins. Shale wells can be drilled in two to four weeks and brought on line within months, while offshore wells are costlier and can take much longer.
What are horizontal wells?
A horizontal well is a type of directional drilling technique where an oil or gas well is dug at an angle of at least eighty degrees to a vertical wellbore. This technique has become increasingly common and productive in recent years.
What is steerable drilling system?
A rotary steerable system (RSS) is a form of drilling technology used in directional drilling. It employs the use of specialized downhole equipment to replace conventional directional tools such as mud motors.
What is Toolface in drilling?
1. n. [Drilling] The angle measured in a plane perpendicular to the drillstring axis that is between a reference direction on the drillstring and a fixed reference. For near-vertical wells, north is the fixed reference and the angle is the magnetic toolface.
What are the types of boreholes?
– There are in fact three major categories of well : dug wells, driven wells and drilled wells, commonly known as boreholes.
What are vertical wells?
A vertical well is a technique for accessing an underground reserve of oil or natural gas that involves drilling vertically into the ground. Drilling wells vertically is a traditional method of oil extraction, as compared to their more modern counterpart, directional drilling.
What is an Hz well?
A horizontal well is a type of directional drilling technique. Operators use it to retrieve oil and natural gas in situations in which the shape of the reservoir is abnormal or difficult to access. It permits access to subsurface reservoirs that may not be accessible from directly above.
How is Toolface calculated?
The toolface can be found using the following formula:
- – toolface angle, deg.
- – azimuth change, deg;
- The number of wedges (
- is the angle of the blade of the wedge.
- – length of deviation section, m (ft);
- Input data:
- Calculation of dogleg angle.
- The Dogleg of the correction to reach the required direction is 6.7 deg.
How do you open a Whipstock Rathole?
The rathole is then opened to full gauge using a hole opener with a pilot bit or bull nose. The whipstock causes a significant change in hole direction and angle in a very short interval; therefore, a very limber assembly should be run following the hole opener.
What is a Whipstock?
The whipstock is an old directional drilling tool that is used today primarily to perform well sidetracking out of the casing.
What’s new with Trackmaster Whipstock?
With the addition of the Trackmaster Whipstock product line, we are now able to provide the complete range of cased and open hole sizes with anchor configurations in both mechanical and hydraulic set. The Trackmaster system is regarded by many as the premier whipstock system and the hydraulic anchor option is the best in the industry.
Where is the Whipstock on a drill bit?
The permanent whipstock is run in the hole on the bottom of the drill string being attached with a shear pin. Usually, about 30 feet of tail pipe is run below the whipstock to act as an anchor. The assembly is run in the hole and landed near bottom.