Systems / Off Shore / Gator Single Trip P&A System

This single trip system, consisting of a CX-2 Bridge Plug, Gator perforating tool and components, a drop ball circulation sub and a CXRTP was run in on 5 1/2" pipe into the 9 5/8" 53.5# casing. The CX-2 was set, released and pressure tested at 3,810 ft. The string was then picked up to 2,720 ft and the Gator tool was functioned to hydromechanically perforate, achieving 4 radial perforations, 90 degrees apart to ensure good radial coverage at and then again at the lower perforation area at 3,780 ft. The perforations have a large TFA and push out into the outer annulus, helping the centralise the casing for more effective annular cement displacement. The CX-RTP was then set at 3,760 ft and circulation was then confirmed through the perforations using the B annulus. After confirmation of the circulation path, the drop ball circulation sub was opened to isolate the Gator tool below and cement was pumped and squeezed into the perforated outer / B annulus.

Bottom hole assembly

Gator Single Trip P&A System bottom hole assembly, top to bottom
  1. MECHANICAL PACKER

    A compression set packer that can be used for testing feed rates

  2. BALL DROP SUB

    Impact vibration and jetting used to break up and dislodge stubborn cement or barite during washing

  3. Unloader SUB

    Equalization sub with ports to the A-annulus that close in tension and open in compression. Allows for equalization of the string and A-annulus after perforations are made.

  4. GATOR PERFORATOR

    Tool allows for a surface indication to show the tool has made a full stroke by identifying cut pressure on both the standard four-bladed tool and the DPT.

    More about the Gator Perforator →
  5. Velocity Control Valve

    A rate-activated valve that closes once the pre-determined activation rate is achieved. In this well it was set to close at 180 liters a minute.

  6. MEGA PACKER

    expands to create the A B annulus cement supoprt barrier

    More about the Mega Packer →
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