US 12,607,082 B2 · Bi-directional wellhead annulus packoff with integral seal and hanger lockdown ring

Abstract

A wellhead annulus packoff and an associated method of energizing and de-energizing include at least one seal element, a hanger lockdown ring, a hanger lockdown energizing ring, a seal lockdown ring, a seal lockdown energizing ring, and one or more mechanical conditional operators, where the at least one seal element adapted to be energized with a first energizing force applied through a seal lockdown energizing ring and with the one or more mechanical conditional operators being engaged, where the seal lockdown ring is adapted to be energized with the first energizing force and with the one or more mechanical conditional operators being disengaged, and where the hanger lockdown ring is adapted to be energized with a second energizing force applied through a hanger lockdown energizing ring.

Claims20

Dependent claims

A method to de-energize a wellhead annulus packoff that comprises at least one seal element, a seal lockdown energizing ring, a hanger lockdown energizing ring, a seal lockdown ring, a hanger lockdown ring, and one or more mechanical conditional operators, the one or more mechanical conditional operators being in a disengaged state with the wellhead annulus packoff in a fully energized stage, the method comprising:

enabling a first de-energizing force through the hanger lockdown energizing ring, the first de-energizing force to cause the hanger lockdown ring to be de-energized;
and
enabling a second de-energizing force, following the first de-energizing force and through the seal lockdown energizing ring, the second de-energizing force to cause the seal lockdown ring to be de-energized by catching an upper seal energizing ring within a narrow neck between fingers of the seal lockdown energizing ring to remove the upper seal energizing ring from being against the seal lockdown ring, which also causes the at least one seal element to be de-energized.

A system for a wellhead annulus packoff, the system comprising:

at least one seal element, a seal lockdown energizing ring, a hanger lockdown energizing ring, a seal lockdown ring, a hanger lockdown ring, and one or more mechanical conditional operators, the one or more mechanical conditional operators being in a disengaged state with the wellhead annulus packoff in a fully energized stage, wherein the hanger lockdown energizing ring is adapted to receive therethrough a first de-energizing force to cause the hanger lockdown ring to be de-energized, and wherein the seal lockdown energizing ring is adapted to received therethrough a second de-energizing force that follows the first de-energizing force, the second de-energizing force to cause the seal lockdown ring to be de-energized by catching an upper seal energizing ring within a narrow neck between fingers of the seal lockdown energizing ring to remove the upper seal energizing ring from being against the seal lockdown ring, which also causes the at least one seal element to be de-energized.

Dependencies are inferred from the claim text.

Bi-directional wellhead annulus packoff with integral seal and hanger lockdown ring

Life of this patent

Bi-directional wellhead annulus packoff with integral seal and hanger lockdown ring

Life of this patent

Abstract

Claims20