A deviated well pump is required each time a well becomes anything that is off precise vertical. A deviated well is a well that is varied from the true vertical, using strategized angles to reach a formation that is not directly beneath the surface location. The deviation is the distance of the wellbore from the vertical, determined by the horizontal distance from the rotary table to the target.
While wellbores are typically drilled vertically, there are occasions when it becomes necessary to drill at an angle. When it is intentional, it is called directional drilling. It allows operators to reach subsurface areas laterally remote from the surface entry point of the bit. It also requires the use of a deviated well pump.
The deliberate deviation of a wellbore from the vertical direction that it would normally take is accomplished through the use of bottomhole assembly configurations, whipstocks, instruments to measure the path of the wellbore in three-dimensional space, data links to communicate measurements taken subsurface to the surface and mud motors, along with specific BHA components and drill bits.
In order to vary off the vertical course, the driller utilizes drilling parameters such the force on a bit, as well as rotary speed, which can deflect the bit off the center axis of the wellbore.
Efficient pumping of these deviated wells require efficient deviated well pumps. The conventional rod pumps are not the most effective. The jet pump, such as that developed by JJ Tech, is most advantageous to the well that is deviated.
If the removal of the pump becomes necessary, the patented design of the JJ Tech jet pump allows for easy retrieval. It is accomplished by the manipulation of the surface valves and the reversing of the circulation of the fluid by reversing the flow of the surface pump. There is no wire line, pulling unit or work over rig needed. The size of the carrier makes it appealing to clients with severely deviated or horizontal wells.
Although the jet pump is smaller in size, it is capable of allowing greater production rates due to low internal pressure drop. There are no moving parts in the pump, and the installation and handling are simplified over the conventional subsurface pumps.