Inflatable packers
发布时间：2015-01-08 13:15 浏览量：1362
The Davis line of inflatable packers features a weldless design that provides a strong and effective seal. They are available for virtually all drilling, completion and workover requirements, as well as for pipeline testing and repair and offshore platform installation.
InflatagripLongseal* Packers
These Davis Packers, available with 20- or optional 40-foot length seals, provide a positive seal against fluid or gas movement in the annulus of vertical, deviated or horizontal wells.
They are recommended for use where naturally occurring fracture systems and high permeability streaks require a longer seal for more positive zone isolation. Mud- or cement- filled Inflata grip Long seal Packers will conform to and seal in washed-out, elliptical or other irregularly shaped wellbores.
They are of the limited steel rib reinforcing type in that the ribs do not extend completely from one end of the seal to the other. This feature allows the non-reinforced center portion of the packer to expand and seal in larger, irregularly shaped wellbores and still be retained at the ends by the overlapping steel Inflata grip reinforcing ribs.
Features/Benefits of Types 202 and 402 Inflata grip Long seal Packers:
1. Patented Inflata grip® end reinforcing metal ribs anchor against wall of well for positive end containment during and after inflation.
2. Reinforcing metal ribs mechanically attached at each end of the element, along with the single durometer rubber element, assure a uniform inflation between the metal ribs to displace a maximum amount of mud from the seal area.
3. Mechanical anchoring of reinforcing metal ribs in end subs, together with the Inflata grip feature, greatly improves the pressure differential holding ability of the packers.
4. Dual inflation valve system provides56% greater inlet area for the inflation fluid than dual valve systems of competition.
5. Longer reinforcing ribs bonded to arubber cover, in addition to surface preparation of the mandrel, minimize any wadding of packer element during running.
6. Premium threads are available internally throughout the packers, eliminating the need for welding orthe use of crossover sub.
7. No welding or epoxy, which might cause premature failure, is used in manufacturing Davis packers.
Unique Application Large Diameter Inflata grip Long seal Packers.
Davis sales/engineering personnel have designed and implemented a method on several wells in a deepwater-drilling environment, which employs the Inflatagrip Long seal Packers for the purpose of containing troublesome shallow salt-water flows.
This system has been utilized on 20”and 16” casing strings at the present time. Packer placement, inflation pressure settings, and the use of specialty float equipment to receive a drop ball have been instrumental in the success of this method. For more complete details please contact your local Davis representative.
