Patent Application
20190390533
In the resource exploration and recovery industry, various valves are employed to control fluid flow. Safety valves, for example, are employed to prevent formation fluids from exiting a wellhead uncontrolled. A safety valve may take the form of a flapper valve. Flapper valves including opening and closing mechanisms. For example, a flapper valve may be opened by axially shifting a tubular or flow sleeve. The flow sleeve may contact and pass through a flapper thereby opening the valve. When an activating force is removed, e.g., the flow sleeve is withdrawn, a biasing system causes the flapper to return to a closed configuration.
Flapper valves typically are lengthy given the need to house the opening and closing mechanisms. Limitations on placement of the flapper valve are driven by valve length. The longer the valve, the more difficult to locate in certain portions of a downhole system leading to greater installation costs. Additionally, the longer valve contributes more frequent maintenance leading to higher operational costs. Accordingly, the art would appreciate a valve assembly having an operating mechanism that may take up less room thereby leading to a shorter housing length.
Disclosed is an actuator mechanism for a valve system including a housing having an outer surface, an inner surface defining an opening and a chamber extending partially about the housing between the outer surface and the inner surface. A hinge is mounted to the housing. The hinge is exposed at the chamber. A valve member is fixedly connected to the hinge. The valve member is selectively positionable across the opening. An actuator is arranged in the chamber and selectively biased against the hinge to transition the valve member between an open configuration and a closed configuration.
Also disclosed is a resource exploration and recovery system including a first system and a second system fluidically connected to the first system. The second system includes one or more tubulars. At least one of the one or more tubulars supports a valve system including an actuator mechanism. The actuation mechanism includes a housing having an outer surface, an inner surface defining an opening and a chamber extending partially about the housing between the outer surface and the inner surface. A hinge is mounted to the housing. The hinge is exposed at the chamber. A valve member is fixedly connected to the hinge. The valve member is selectively positionable across the opening. An actuator is arranged in the chamber and selectively biased against the hinge to transition the valve member between an open configuration and a closed configuration.
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.
A resource exploration and recovery system, in accordance with an exemplary embodiment, is indicated generally at 10, in
Second system 18 may include a tubular string 30, formed from one or more tubulars 32, which extends into a wellbore 34 formed in formation 36. Wellbore 34 includes an annular wall 38 which may be defined by a surface of formation 36, or a casing tubular 40 such as shown. In an exemplary aspect, tubular string 30 supports a downhole system 48 including a tubular 50 that houses a tool mechanism 54.
In an embodiment, tool mechanism 54 may take the form of a surface safety valve (SSV) or subsurface safety valve (SSSV) 60 including a housing 64 and a valve member 70 that may take the form of a flapper 72. Referring to
In accordance with an exemplary aspect, flapper 72 is rotatably connected to housing 64 via an actuator mechanism 108 including a hinge 112. Referring to
In accordance with an exemplary aspect, actuator mechanism 108 also includes an actuator 140 arranged in internal passage 100 of conduit 94. Actuator 140 may take the form of a piston 143 having an actuator member 146 that may be selectively urged against first end 114 of hinge 112. Pressure applied to first end 114, causes hinge 112 to linearly translate from a first or home position in housing 64. The linear translation is converted to rotational movement through an interaction of plurality of threads 120 and the plurality of threads on housing 64. The rotational movement causes flapper 72 to transition between a closed configuration and an open configuration.
In still further accordance with an exemplary aspect, actuator mechanism 108 of SSV 60 includes a biasing element 154 arranged in housing 64 at second end 115 of hinge 112. Biasing element 154 acts about second end 114 of hinge 112 in a direction opposite to that of actuator member 142. In an embodiment, biasing element 154 may take the form of a spring mechanism 156. In an exemplary aspect, biasing element 154 may take the form of a Belleville stack 158. It should however be appreciated that biasing element 154 may take on a variety of forms. Biasing element 154 urges hinge axially in a direction opposite to that of actuator member 146. Specifically, once an activation force, such as control fluid pressure, is removed from actuator member 146 biasing element 154 urges hinge 112 to return to an initial or home position thereby returning flapper 72 to the closed configuration.
Reference will now follow to
Another actuator 240 arranged in internal passage 160 of conduit 154. Another actuator 240 may take the form of a piston 243 having another actuator member 246 that may be selectively urged against second end 115 of hinge 112. Pressure applied to second end 115, causes hinge 112 to linearly translate back to the first or home position in housing 64. The linear translation is converted to rotational movement through an interaction of plurality of threads 120 and the plurality of threads on housing 64. The rotational movement causes flapper 72 to translate between a closed configuration and an open configuration. With this arrangement, actuator mechanism 108 fails in an as is configuration. That is, if a failure occurs after actuation of actuator 140, flapper 72 will not be biased back to the home configuration.
At this point it should be appreciated that the SSV described in connection with exemplary embodiments includes an actuator mechanism that is arranged at the flapper. Further the actuator mechanism is operable to open and close the flapper without the need for a flow sleeve and other related structure. In this manner, the SSV in accordance with exemplary embodiments may be more compact, and easier to service thereby providing greater flexibility in placement and maintenance thereby reducing operational costs.
Set forth below are some embodiments of the foregoing disclosure:
An actuator mechanism for a valve system comprising: a housing including an outer surface, an inner surface defining an opening and a chamber extending partially about the housing between the outer surface and the inner surface; a hinge mounted to the housing, the hinge being exposed at the chamber; a valve member fixedly connected to the hinge, the valve member being selectively positionable across the opening; and an actuator arranged in the chamber and selectively biased against the hinge to transition the valve member between an open configuration and a closed configuration.
The actuator mechanism for the valve system according to any prior embodiment, wherein the hinge includes a first end, a second end and an intermediate portion, at least one of the first end and the second end including a threaded region.
The actuator mechanism for the valve system according to any prior embodiment, wherein the first end of the hinge is exposed at the chamber and to the actuator.
The actuator mechanism for the valve system according to any prior embodiment, further comprising: a biasing element arranged in the housing at the second end of the hinge.
The actuator mechanism for the valve system according to any prior embodiment, wherein the biasing element comprises a spring mechanism.
The actuator mechanism for the valve system according to any prior embodiment, wherein the biasing element comprises a Belleville stack.
The actuator mechanism for the valve system according to any prior embodiment, further comprising: a mechanical fastener passing through the valve member into the hinge.
The actuator mechanism for the valve system according to any prior embodiment, wherein the actuator comprises a piston arranged in the chamber.
The actuator mechanism for the valve system according to any prior embodiment, further comprising: another chamber extending partially about the housing between the outer surface and the inner surface; and another actuator arranged in the another chamber, the another actuator being selectively biased against the hinge to transition the valve member between an open configuration and a closed configuration.
A resource exploration and recovery system comprising: a first system, a second system fluidically connected to the first system, the second system including one or more tubulars, at least one of the one or more tubulars supporting a valve system including an actuator mechanism comprising: a housing including an outer surface, an inner surface defining an opening and a chamber extending partially about the housing between the outer surface and the inner surface; a hinge mounted to the housing, the hinge being exposed at the chamber; a valve member fixedly connected to the hinge, the valve member being selectively positionable across the opening; and an actuator arranged in the chamber and selectively biased against the hinge to transition the valve member between an open configuration and a closed configuration.
The resource exploration and recovery system according to any prior embodiment, wherein the hinge includes a first end, a second end and an intermediate portion, at least one of the first end and the second end including a threaded region.
The resource exploration and recovery system according to any prior embodiment, wherein the first end of the hinge is exposed at the chamber and to the actuator.
The resource exploration and recovery system according to any prior embodiment, further comprising: a biasing element arranged in the housing at the second end of the hinge.
The resource exploration and recovery system according to any prior embodiment, wherein the biasing element comprises a spring mechanism.
The resource exploration and recovery system according to any prior embodiment, wherein the biasing element comprises a Belleville stack.
The resource exploration and recovery system according to any prior embodiment, further comprising: a mechanical fastener passing through the valve member into the hinge.
The resource exploration and recovery system according to any prior embodiment, wherein the actuator comprises a piston arranged in the chamber.
The resource exploration and recovery system according to any prior embodiment, wherein the valve system defines one of a surface safety valve (SSV) and a subsurface safety valve (SSSV) system.
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 modifier “about” used in connection with a quantity is inclusive of the stated value and has the meaning dictated by the context (e.g., it includes the degree of error associated with measurement of the particular quantity).
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 wellbore, and/or equipment in the wellbore, 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.
