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GATOR SINGLE TRIP P&A SYSTEM

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

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

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.

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.

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.

expands to create the A B annulus cement supoprt barrier

OPERATION

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. A

1.Trip the BHA to bott om (it may have a ball on seat or it might be just a rotational set bridge plug)
2.Pressure up to start setting of the bridge plug or set plug by rotation Pressure test bridge plug. 3.Move to first Gator Perforation Flow fluid down string to close VCV Continue to pressure up on Gator to shear (super shear) at approximately 3500 PSI make a cut at 4000 psi
4.Equalize by squatting on ULS and move out of cuts, establish feed rate into cuts down annulus
5.Move to upper perforation close VCV and make cut
6.Equalize and move string, place packer between cuts and establish feed rate
7.Once you have feed rate into both sets of perforations set packer between and circulate clean staying below VCV closing rate
8.Once clean fluids back to surface drop ball for TBD or circulation sub and start with packer unset
9.Set packer in position for cement job and cement (part of the B annulus) unset packer and pump balanced cement plug to stop u tubing
10.POOH

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