In the resource recovery and fluid sequestration industries, there is often need to install liners in boreholes. While liner configurations are well known and have been installed in many ways, there is still a concern regarding pressure issues that can have an undesirable impact on reliability at the hanger and concerns about collapse and burst ratings. The art will well receive alternatives that improve reliability and also improve burst and collapse ratings.
An embodiment of a hanger system including an expandable liner, an expandable first slip subsystem disposed about the liner, an expandable second slip subsystem disposed about the liner, a seal disposed about the liner and between the first slip subsystem and the second slip subsystem, and an expandable lock ring disposed about the liner and against one of the first slip subsystem or the second slip subsystem.
An embodiment of a method for lining a borehole including running a liner system into a borehole, landing the liner system in a liner hanger, expanding the first slip subsystem simultaneously with a portion of the liner, expanding the second slip subsystem simultaneously with another portion of the liner, and sealing the liner to the liner hanger between the first slip subsystem and the second slip subsystem with the seal.
An embodiment of a borehole system including a borehole in a subsurface formation, a casing in the borehole, and a liner system disposed within the casing.
The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
Referring to
System 10 includes both a first and second slip subsystem 14, 16 with the seal 18 therebetween because the assembly protects load capacity rating. Seal 18 prevents pressure events from one side of the system 10 from reaching both of the slip subsystems. Therefore, were a pressure event to occur from downhole of the system 10, the liner 12 might be compressed to some extent that could undermine the engagement of the first slip system 14 with the hanger causing that slip subsystem to have a significantly lower load capacity rating. Seal 18 however, prevents that pressure event from also compromising the second slip subsystem 16 and rather allows that system to remain in perfect working order, thereby maintaining the load capacity rating. Alternatively, if a pressure event occurred uphole of the system 10, the casing (not shown this figure) could balloon, thereby undermining the rating of the second slip subsystem 16 by reducing the engagement of the second slip subsystem 16 with the hanger. The second slip subsystem would therefore be derated in this condition but due to the seal 18, the first slip subsystem 14 would be unaffected by the pressure event and hence would maintain the full load capacity rating.
From
In addition to the foregoing, the anchor 22 includes an anchor body 30 having an inside surface thread 32 and an outside surface wicker 34. Thread 32 is another pre and post expansion engagement type thread similar to that of the lock ring 20. The anchor differs in that the wicker(s) 34 are not hardened since the splitting of the anchor 22 during expansion is not permitted. Rather, the anchor must remain a sealed component after expansion. It will also be noted that relatively more wickers 34 are provided on anchor 22 than are provided on lock ring 20. This is directly related to the deformation resistance of each wicker. Hardened wickers have substantially greater resistance to deformation relative to nonhardened wickers and accordingly fewer are needed to provide a desired amount of movement limitation.
In embodiments, it is contemplated that the lock ring 20 could be omitted by extending the length of the anchor to substitute for the lock ring 20 job of compressing the slip subsystems and seal for running.
During use, and referring to
One of the benefits of the system 10 is that tit allows the used of softer less expensive low alloy steel materials, for example, without burst and collapse rating reductions.
Referring to
Set forth below are some embodiments of the foregoing disclosure:
Embodiment 1: A hanger system including an expandable liner, an expandable first slip subsystem disposed about the liner, an expandable second slip subsystem disposed about the liner, a seal disposed about the liner and between the first slip subsystem and the second slip subsystem, and an expandable lock ring disposed about the liner and against one of the first slip subsystem or the second slip subsystem.
Embodiment 2: The system as in any prior embodiment further comprising an expandable anchor having a wicker on an outside surface thereof.
Embodiment 3: The system as in any prior embodiment wherein the wicker is a plurality of wickers.
Embodiment 4: The system as in any prior embodiment wherein the wicker is unhardened.
Embodiment 5: The system as in any prior embodiment wherein the anchor includes a polished bore therein.
Embodiment 6: The system as in any prior embodiment wherein the lock ring compresses the first slip subsystem, second slip subsystem and seal against one another for run in.
Embodiment 7: The system as in any prior embodiment wherein the lock ring is disposed about the liner adjacent one of the first slip subsystem and the second slip subsystem.
Embodiment 8: The system as in any prior embodiment wherein the lock ring includes a wicker on an exterior surface thereof.
Embodiment 9: The system as in any prior embodiment wherein the wicker is a plurality of wickers.
Embodiment 10: The system as in any prior embodiment wherein the wicker is hardened.
Embodiment 11: A method for lining a borehole including running a liner system as in any prior embodiment into a borehole, landing the liner system in a liner hanger, expanding the first slip subsystem simultaneously with a portion of the liner, expanding the second slip subsystem simultaneously with another portion of the liner, and sealing the liner to the liner hanger between the first slip subsystem and the second slip subsystem with the seal.
Embodiment 12: The method as in any prior embodiment further comprising expanding an anchor of the liner system.
Embodiment 13: The method as in any prior embodiment wherein the expanding is by swaging.
Embodiment 14: The method as in any prior embodiment wherein wickers of the anchor are driven into a parent casing.
Embodiment 15: The method as in any prior embodiment wherein the wickers of the anchor arrest longitudinal movement of the liner while expanding thereby causing the first and second slip subsystems to set without axial movement relative to the hanger.
Embodiment 16: The method as in any prior embodiment wherein the anchor is expanded without splitting thereof.
Embodiment 17: The method as in any prior embodiment further comprising expanding the lock ring simultaneously with another portion of the liner.
Embodiment 18: The method as in any prior embodiment further including splitting the lock ring due to expansion thereof.
Embodiment 19: The method as in any prior embodiment further comprising driving a wicker on an exterior surface of the lock ring into the hanger to arrest longitudinal movement of the liner relative to the hanger.
Embodiment 20: A borehole system including a borehole in a subsurface formation, a casing in the borehole, and a liner system as in any prior embodiment disposed within the casing.
The use of the terms “a” and “an” and “the” and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. Further, it should be noted that the terms “first,” “second,” and the like herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms “about”, “substantially” and “generally” are intended to include the degree of error associated with measurement of the particular quantity based upon the equipment available at the time of filing the application. For example, “about” and/or “substantially” and/or “generally” can include a range of ±8% or 5%, or 2% of a given value.
The teachings of the present disclosure may be used in a variety of well operations. These operations may involve using one or more treatment agents to treat a formation, the fluids resident in a formation, a borehole, and/or equipment in the borehole, such as production tubing. The treatment agents may be in the form of liquids, gases, solids, semi-solids, and mixtures thereof. Illustrative treatment agents include, but are not limited to, fracturing fluids, acids, steam, water, brine, anti-corrosion agents, cement, permeability modifiers, drilling muds, emulsifiers, demulsifiers, tracers, flow improvers etc. Illustrative well operations include, but are not limited to, hydraulic fracturing, stimulation, tracer injection, cleaning, acidizing, steam injection, water flooding, cementing, etc.
While the invention has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the claims. Also, in the drawings and the description, there have been disclosed exemplary embodiments of the invention and, although specific terms may have been employed, they are unless otherwise stated used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention therefore not being so limited.
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