Expandable liner hanger with robust slips for downhole conditions with high pressure conditions
In general, in one aspect, embodiments relate to an expandable liner hanger that includes a body that includes one or more anchoring ridges configured to seal against a casing, where at least one of the one or more anchoring ridge includes a first section and a second section, where a first axial distance spanned by the first section is less than a second axial distance spanned by the second section, and where the second section is reinforced to resist differential pressure that reduces contact pressure between the first section and the casing.
1 . An expandable liner hanger comprising:
a body that includes one or more metal anchoring ridges configured to metal-to-metal seal against a casing comprising metal, wherein at least one of the one or more metal anchoring ridges includes a first section and a second section, each of the first section and the second section being metal, the first section comprising a sealing area configured to engage the casing to form the metal-to-metal seal, wherein a first axial distance spanned by the first section is less than a second axial distance spanned by the second section, wherein the second section is reinforced to resist reduction in contact pressure between the first section and the casing caused by wellbore pressure, wherein the sealing area comprises a stepped profile to enhance the metal-to-metal seal of the sealing area with the casing, and wherein the stepped profile is configured to bite into the casing.
2 . The expandable liner hanger of claim 1 , wherein the second axial distance is at least 1.5 times the first axial distance, and wherein the at least one of the one or more metal anchoring ridges comprises a metal spike.
3 . The expandable liner hanger of claim 1 , wherein the one or more metal anchoring ridges are machined metal anchoring ridges, wherein the second section reinforced to resist reduction in contact pressure between the first section and the casing comprises the second section having a yield strength of at least 175 kilopounds per square inch (ksi), and wherein the first section is directly adjacent to the second section.
4 . The expandable liner hanger of claim 1 , further comprising:
a run-in-hole configuration, wherein the sealing area extends along an edge of the metal anchoring ridge; and
a set configuration, wherein an outer diameter of at least a portion of the expandable liner hanger is greater than that portion during the run-in-hole configuration, wherein the sealing area provides a contact area between the metal anchoring ridge and the casing.
5 . The expandable liner hanger of claim 4 , wherein in the run-in-hole configuration, the first section is flush with the second section.
6 . The expandable liner hanger of claim 1 , wherein the stepped profile comprises a first step extending radially outward from the first section, and a second step extending radially outward from the first step.
7 . The expandable liner hanger of claim 6 , wherein the first step extends radially outward from the first section by a first distance, wherein the second step extends radially outward from the first step by a second distance, and wherein the first distance is at least 5 times the second distance.
8 . The expandable liner hanger of claim 1 , wherein the at the least one of the one or more metal anchoring ridges is flat and does not have a stepped profile, and wherein the first section is flush with the second section.
9 . The expandable liner hanger of claim 1 , wherein the first section is flush with the second section.
10 . An expandable liner hanger comprising:
a body that comprises one or more anchoring ridges comprising metal and each comprising a metal sealing area extending along a respective edge of the anchoring ridge and configured to seal against casing, wherein at least a portion of the body that is downhole from at least one metal sealing area of the one or more anchoring ridges is reinforced to resist differential pressure that reduces contact pressure between the one or more anchoring ridges and the casing, wherein an axial distance spanned by the reinforced portion is greater than an axial distance spanned by at least two of the one or more anchoring ridges, and wherein a radial distance spanned by the reinforced portion is greater than a radial distance spanned by the body at each respective anchoring ridge.
11 . The expandable liner hanger of claim 10 , wherein the reinforced portion is directly adjacent to at least one of the one or more anchoring ridges.
12 . The expandable liner hanger of claim 10 , wherein the reinforced portion of the body is stiffer than at least a portion of each anchoring ridge.
13 . The expandable liner hanger of claim 12 , wherein the reinforced portion has a yield strength of at least 175 ksi.
14 . The expandable liner hanger of claim 10 , wherein the one or more anchoring ridges are machined metal anchoring ridges.
15 . The expandable liner hanger of claim 10 , wherein at least one of the one or more anchoring ridges comprises:
a first step extending radially outward from the body; and
a second step extending radially outward from the first step.
16 . The expandable liner hanger of claim 15 , wherein the first step extends radially outward from the body by a first distance, wherein the second step extends radially outward from the first step by a second distance, and wherein the first distance is at least 4 times the second distance.
17 . An expandable liner hanger comprising:
a body that includes a sealing spike followed by reinforcement spikes that extend along a length of the body, wherein the sealing spike is configured to seal against casing, wherein the reinforcement spikes are configured to reduce an expansion force required to expand the sealing spike while achieving sufficient stiffness to resist differential pressure that reduces contact pressure between the sealing spike and the casing;
a run-in-hole configuration; and
a set position, wherein in the set position, there is a gap between the casing and a reinforcement spike adjacent to the sealing spike.