US 11,702,892 B2
Disconnect device
Tyler Whitney, Houston, TX (US); Alessandro Caccialupi, Houston, TX (US); and Scott Benzie, Houston, TX (US)
Assigned to Coretrax Americas Limited, Houston, TX (US)
Filed by Coretrax Americas Ltd., Houston, TX (US)
Filed on Jul. 14, 2021, as Appl. No. 17/376,094.
Claims priority of provisional application 63/051,689, filed on Jul. 14, 2020.
Prior Publication US 2022/0018193 A1, Jan. 20, 2022
Int. Cl. E21B 17/02 (2006.01)
CPC E21B 17/021 (2013.01) 4 Claims
OG exemplary drawing
 
2. A method for disconnecting a disconnect device for use as part of a downhole assembly in an oil or gas well comprising:
(A) outfitting a downhole assembly with a disconnect device comprising:
a lower receptacle assembly comprising a recess profile; and
an upper assembly comprising:
a shaft comprising a fluid passage,
a collet comprising collet fingers,
a piston,
a cylinder assembly,
a pressure chamber disposed radially between the shaft and the cylinder assembly, and
a spring, wherein the piston is disposed radially between the shaft and the collet such that the collet fingers are engaged with the recess profile, and wherein the piston is coupled to the cylinder assembly via at least one shear pin;
(B) applying an actuating pressure within the fluid passage and the pressure chamber to a pressure level capable of shearing the at least on shear pin to free the piston for displacement;
(C) lowering the pressure level in the pressure chamber by releasing pressure;
(D) allowing the piston to be displace to a position radially between the shaft and the cylinder assembly, wherein the collet fingers are not engaged with the recess profile; and
(E) disconnecting the lower receptacle assembly from the upper assembly.