Hydril GK MSP Annular Preventer BOP

Who can produce the GK type annular BOP and packing element,Tianjin dongrui Petroleum Machinery Co.,Ltd,The Hydril GK annular blowout preventer  is the most common annular preventer used in drilling rig, particularly in surface stack installations, and is unique in its response to well pressures. Like most other annular preventers, the preventer is closed with about 5,520 kPa (800 psi) pressure. The Hydril GK annular blowout preventer with a working pressure of less than 69,000 kPa (10,000 psi) is, however, also energized by the well pressure so that when the well pressure increases, the closing pressure must be reduced to avoid damaging the packing unit.

This wellhead pressure assist is derived from its piston configuration and applies to the GL and MSP types of annular BOP preventers (except the 749.3 mm/29·5 3,450 kPa/500 psi unit). The manufacturer’s instructions on Hydril annular blowout preventers should be consulted for more detailed information. Charts determining operating pressures are also provided in the manufacturer’s literature.

• The Hydril GK Annular BOPs are particularly qualified to meet the industry’s needs for simple and reliable blowout protection. Over 40 years of operational experience provide the simplest, field proven mechanism in the industry.
• Only Two Moving Parts (piston and packing unit) on the Hydril Annular BOP mean few areas are subjected to wear. The BOP is thus a safer and more efficient mechanism requiring less maintenance and downtime.
• A Long piston with a length-to-diameter ratio approaching one eliminates tendencies to cock and bind during operations with off-center pipe or unevenly distributed accumulation of sand, cuttings, or other elements. This design ensures the packing unit will always reopen to full bore position.
• Back to Front Feedable Rubber on the Packing Unit enables the packing unit to close and seal on virtually any shape in the drillstring or completely shut in ( hard shut in procedure – soft shut in procedure) the open bore and to strip tool joints under pressure. This feature permits confident closure of the BOP at the initial indication of a “kick” (kick warning signs) without delaying to locate the tool joint.
• The Conical Bowl Design of the Piston provides a simple and efficient method of closing the packing unit. The piston is a sealing surface against the rubber packing unit; there is no metal-to-metal wear, thus, longer equipment life results.
• Utilization of Maximum Packing Unit life is made possible with a piston indicator for measuring piston stroke. This measurement indicates the remaining packing unit life and ensures valid testing.
• A Field Replaceable Wear Plate In the BOP Head serves as an upper non-sealing wear surface for the movement of the packing unit, making field repair fast and economical.
• Flanged Steel Inserts In the Packing Unit reinforce the rubber and control rubber flow and extrusion for safer operation and longer packing unit life.
• Greater Stripping Capability is inherent in the design of the packing unit since testing (fatigue) wear occurs on the outside, and stripping wear occurs on the inside of the packing unit. Thus, testing wear has virtually no effect on stripping capability and greater overall life of the packing unit results. The resulting ability to strip the drill string to the bottom without first changing the packing unit means a safer operation, lower operating costs, and longer service life for the packing unit.
• The Packing Unit Is Tested to Full Rated Working Pressure at the factory and the tests are documented— before it reaches the well site—to ensure a safe, quality performance.
• The Packing Unit Is Replaceable with Pipe In the Bore, eliminates pulling the drill string for replacement, and reduces operating expenses with more options for well control techniques.
• Large pressure-energized seals are used for dynamically sealing piston chambers to provide safe operation, long seal life, and less maintenance.
• Piston Sealing Surfaces Protected by Operating Fluid lowers friction and protects against galling and wear to increase seal life and reduce maintenance time.

• annular bop Hydril means is an essential device that is utilized in offshore applications to prevent blowouts when drilling oil and gas. These BOPs are configured to rapidly, in an emergency, close the wellbore aperture so the wellbore is sealed to protect workers and the environment.

  "HYDRIL ANNUALR BOP" means a BOP which uses a large "donut" shaped rubber element to seal around the drill pipe. When it is turned on, the rubber element inflates to seal the wellbore, blocking the flow of oil and gas. This is critical to avoid accidents and keeping the well under control.

  
  

The Packing Element

The packing element or unit has steel segments vulcanized into the rubber body to reinforce it and limit the amount of rubber extrusion when activated.

Figure 2 shows how the packing unit extrudes due to the vertical movement of the piston, whose taper squeezes the packing rubber inward. Hydril GK annular blowout preventer: The type of elastomer (natural rubber, synthetic rubber, or neoprene) used in the packing element should be the most suitable for the particular well conditions