AU2016200326A1 - A relocatable facility - Google Patents

Abstract

A universal gas wellhead facility that is easily transported and is suited for a wide range of raw gas conditions. The facility includes an input connection means, an output connection means, an electrical component, and a processing component, wherein the relocatable facility is configured to be transported as a single unit. The relocatable facility, when in a transport mode, may be sized as an intermodal freight container and/or contained within an intermodal freight container. Figure 7 Figure 8

Description

A RELOCATABLE FACILITY

TECHNICAL FIELD

[0001] The present invention generally relates to a relocatable facility and in one particular, but non-limiting example, to gas wellhead equipment such as a universal facility suitable for use with a coal seam gas (CSG) well.

BACKGROUND

[0002] A relocatable facility generally refers to equipment used for processing an input material, such as a raw product like gas, where the facility can be transported to a processing site relatively easily. A relocatable facility generally includes mechanical and electrical infrastructure used for connecting to an input, processing the material and supplying to an output collecting facility. One example is connecting a wellhead to a gathering facility.

[0003] The relocatable facility, which in one example may be referred to as a wellhead facility, can be used in the process of gathering raw CSG for later processing into liquefied natural gas (LNG), generally at a separate location. This process currently involves very high capital and operational expenses and there is a strong desire to reduce these expenses.

[0004] Existing gas wellhead facilities, particularly in the coal seam gas industry, are typically tailored to the particular well and are largely assembled onsite. The wellheads can often be in locations with restricted access, such as in very remote areas, environmentally sensitive areas, tropical areas with access only available during certain seasons or surrounded by private property allowing only restricted access. This can make the construction of the wellhead facility time consuming and very expensive.

[0005] Current wellhead facilities also require regular maintenance. As described above, however, access to the wellhead facility may be difficult. Therefore, any reduction in the maintenance requirements of a wellhead facility is also highly desirable.

[0006] Any reduction in the number of personnel required in either the construction or maintenance of a wellhead facility will lead to lower costs. This is through not only direct lower labour costs, but also by lowering the chance of poor occupational health and safety situations, both onsite and through travelling to and from the sites.

[0007] The quality and properties of the gas produced from a coal seam gas well generally varies significantly between wells and also changes over the life of the well. Due to the differences between wells, the wellhead facilities are generally custom designed for each well, or each gas field, and are typically not integrated quick install facilities.

[0008] Due to the changes over the life of the well, however, a custom designed wellhead facility may not be appropriate over the complete life of the well, requiring significant maintenance or replacement of some components over time. Therefore, it is desirable for a wellhead facility to be suitable for the widest range of gas conditions as possible.

[0009] Providing a wellhead facility that is suitable for a wide variety of gas conditions would also be advantageous in order to potentially reuse the wellhead facility at the end of the life of a well. Further, reducing the necessary options available to customers would increase the efficiency of the manufacturing and supply process.

[0010] The large size and industrial look of existing wellhead equipment is not visually sympathetic with rural and semi urban settings. Any reduction in size or improvement in the look of the equipment is advantageous in terms of public acceptance of the CSG industry in general, and can have flow on cost reductions in terms of public relations for companies involved.

[0011] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as, an acknowledgement or admission or any form of suggestion that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.

SUMMARY

[0012] In one example form, the present invention seeks to provide a gas wellhead facility that is easily transported and is suited for a wide range of raw gas conditions.

[0013] According to one example aspect, there is provided a relocatable facility, including an input connection means, an output connection means, an electrical component, and a processing component, wherein the relocatable facility is configured to be transported as a single unit.

[0014] In another form, the relocatable facility, when in a transport mode, is sized as an intermodal freight container and/or is contained within an intermodal freight container. In one particular example form, the relocatable facility is sized as a half-height intermodal freight container when in the transport mode.

[0015] In various other example forms: the relocatable facility is expandable once positioned at an onsite location; the electrical component is movable to a position outside a hazardous zone once the relocatable facility is positioned at an onsite location; the electrical component is slidably mounted; and the electrical component is hinge mounted or formed in separable sections.

[0016] In another form, the input connection means and/or the output connection means include flexible couplings.

[0017] In another form, the input connection means include a first stream and a second stream. Preferably, the first stream and the second stream remain separate.

[0018] In other particular example forms: the processing component includes a twin control valve design; the relocatable facility further includes a separator; the relocatable facility further includes a booster means; and the processing component includes a pressure vessel of a size that requires reduced inspection frequency.

[0019] In still further example forms: the relocatable facility is suitable for use with both flowing and powered gas wells; the wellhead facility is suitable for use with both fractured and non-fractured gas wells; the wellhead facility is suitable for use with both high and low flow gas wells; and the wellhead facility is suitable for use with both high and low permeability gas wells.

[0020] In another form, the wellhead facility is stackable in the transport configuration.

[0021] In yet another form, the wellhead facility can be quickly connected and disconnected to the wellhead without fabrication of site specific pipework, and in a manner that facilitates relative movement between ground height on which the facility is supported and the wellhead height.

[0022] In another form, the wellhead facility may include various concealment options such as cladding, covers, and integrated fencing, etc.

[0023] According to another example aspect, there is provided a gas wellhead facility, substantially as herein defined.

BRIEF DESCRIPTION OF FIGURES

[0024] Example embodiments should become apparent from the following description, which is given by way of example only, of at least one preferred but nonlimiting embodiment, described in connection with the accompanying figures.

[0025] Figure 1 illustrates an example embodiment of a gas wellhead facility; [0026] Figures 2A to 2C illustrate flexible pipe setups for connecting the wellhead facility to a wellhead or to a collecting apparatus; [0027] Figure 3 illustrates an example embodiment of a gas wellhead facility with electrical equipment positioned away from other processing equipment; [0028] Figure 4 illustrates an example embodiment of a gas wellhead facility with electrical equipment slidably mounted; [0029] Figure 5 illustrates an example embodiment of a gas wellhead facility with electrical equipment housed within the container, prior to being moved to a deployed position; [0030] Figure 6 illustrates an example embodiment of a gas wellhead facility with electrical equipment slidably mounted and moved to a deployed position; [0031] Figure 7 illustrates an example embodiment of a gas wellhead facility that is made in a containerised form; [0032] Figure 8 illustrates example embodiments of containerised forms of gas wellhead facilities where they are stacked on top of one another; [0033] Figure 9 illustrates an example embodiment of a gas wellhead facility in containerised form loaded onto a truck; [0034] Figure 10 illustrates an example embodiment of a gas wellhead facility with twin control valves for over pressure protection; [0035] Figure 11 illustrates an example embodiment of a gas wellhead facility with an oversize pipe section; [0036] Figures 12A to 12C illustrate various example concealment options for use with a gas wellhead facility; [0037] Figures 13 to 18 illustrate an example embodiment of a gas wellhead facility being unloaded from a truck onsite; [0038] Figure 19 illustrates a schematic view of an example embodiment of a gas wellhead facility; [0039] Figures 20A and 20B illustrate schematic views of example embodiments of gas wellhead facilities, including multiple configuration options; [0040] Figure 21 illustrates an example embodiment of a gas wellhead facility without a large size pressure vessel; [0041] Figure 22 illustrates an example embodiment of a gas wellhead facility with a large size pressure vessel; [0042] Figures 23A to 23D illustrate various views of the frame of a preferred design of a relocatable facility which is adapted to be split/separated at installation; and [0043] Figures 24A to 24C illustrate top, end and side views respectively of an example embodiment of a gas wellhead facility with frame members that can be removed when in an operational mode.

DETAILED DESCRIPTION

[0044] In the figures, incorporated to illustrate features of an example embodiment, like reference numerals are used to identify like parts throughout the figures.

[0045] Referring to the Figures, various example embodiments of relocatable facilities are shown. The example embodiments may be used for processing gas, such as coal seam gas, and may be referred to as a gas wellhead facility. Each relocatable facility is designed to be easily transported to a source of raw material, such as a wellhead, and to be largely self-contained, minimising the setup necessary onsite.

[0046] In one example embodiment, the relocatable facility is contained within the size of a standard intermodal freight container, commonly referred to as a shipping container. The size may be that of any of the available containers, but particularly that of a “half-height” container.

[0047] Referring to Figure 1, an example embodiment of a gas wellhead facility 10 is shown connected to a wellhead 11. The connection uses flexible pipe sections 12 and includes a water stream 13 separate to a gas stream 14. The Figure also shows a collection apparatus 15 that receives the output from a gas outlet 16 and water outlet 17. The wellhead facility 10 includes gas and water processing equipment, such as an optional separator 18, and integrated power equipment 20 and control equipment 21. The wellhead facility 10 may also include twin control valves 22, 23, as will be described in more detail below.

[0048] In one example embodiment, the present invention combines all the mechanical and electrical elements required between the wellhead 11 and the gathering system 15 into a single, containerised, modular frame 25 to simplify logistics, installation, operation and maintenance.

[0049] Capital and operational expenditure cost reductions can be achieved through less equipment and material, less manufacturing cost, reduced transport cost, reduced install time and a downgrade in skill required for installation and maintenance.

[0050] An advantage of the present invention is the flexibility of the package of equipment to serve a wide range of well types and process flows, enabling development of a product approach to what has previously been bespoke design infrastructure.

[0051] Specific features may include one or more of flexible jointing (upstream and downstream) for rapid deployment, integrated power and control elements, containerised design for improved logistics, suitable for all CSG production types including high or low permeability and fractured, pumped or free flow, shut-in based over pressure relief strategy reduces PSV pipework requirements, flexible to allow for separated or combined water and gas streams, optional gas separator, down-hole pump can push fluids, rapid hook-up with downgrade of number and types of skills required on site, and low visual impact. Each of these potential features will be described in more detail below.

[0052] Figures 2A to 2C illustrate a flexible pipe design 12 used for connecting the wellhead facility 10 to the wellhead 11. During installation of prior art designs, an onsite measurement is generally required to the wellhead 11. A rigid pipe section is then manufactured offsite to suit the required connection. This delays the installation, requires higher skill sets onsite and increases logistics and transport costs.

[0053] The present invention allows the connecting pipes to be transported to site as part of the wellhead facility 10. The flexible pipe section 12 is then connected between the wellhead 11 and the wellhead facility 10 on the water line 13 and another on the gas line 14.

[0054] Figure 2A shows that the connecting pipes 12 include rigid pipe sections 30 with flexible couplings 31. These couplings 31 allow both angular flexing 32 and pivotal movement 33 (see Figure 2B). Figure 2A shows a design that includes three couplings 31 with pipe sections 30 that include bends 35, providing a compact flexible section 12. This may be useful in situations with restricted space or larger variations in elevation. Figure 2C on the other hand includes straight pipe sections 30 with only two couplings 31.

[0055] Advantages of using the flexible pipe section 12 include allowing rapid hook up of the wellhead 11 to the wellhead facility 10 once onsite and only requiring a small bolt up crew for installation, often referred to as “plug and play”. The flexible pipe section 12 also tolerates misalignment of components during installation and allows for relative movement between the wellhead 11 (anchored to bedrock so has zero movement) and wellhead facility 10 (vertical movement due to soil dispersion after installation), such as vertical movement 36 shown in Figure 2C. The flexible pipe section 12 still also has good resistance to the erosion from CSG fluids and solids.

[0056] The flexible pipe section 12 will typically have increased material cost when compared to prior art methods; however these costs will be recovered by the reduced costs of installation as described above. A flexible braided FRAS (fire resistant anti static) pipe may be used on the downstream connection to the collection apparatus 15, however this type of pipe does not tolerate the greater erosion found in the wellhead connection piping 13, 14.

[0057] Electrical equipment and mechanical control equipment in the prior art are typically provided as separate pieces of equipment. The present invention, on the other hand, combines the elements into the single wellhead facility 10.

[0058] Referring to Figures 3 and 4, electrical components 20 are provided on a slide out platform 40 that places them outside a hazardous area near the gas processing equipment. Figure 5 shows another example embodiment where the electrical equipment 20 is housed within the wellhead facility 10 prior to being deployed, while Figure 6 shows the electrical equipment 20 once deployed.

[0059] Mechanical elements include components such as the container, piping and fittings, valves, vessels, pump, special piping items such as flex-joints, and control valves. Electrical elements include components such as instruments, transformer, switchgear or ring main unit (RMU), controllers such as programmable logic controller (PLC) or SCADA, remote terminal unit (RTU) and cabling.

[0060] The containerised wellhead facility 10, regardless of the exact configuration and size, consolidates various wellhead elements in a single modular, standardised package. Combining all elements into the wellhead facility 10 simplifies installation and reduces logistics costs. Advantages include not requiring an electrician onsite due to prewiring (“plug and play”), and being visually less obtrusive.

[0061] Electrical elements are combined with the mechanical control equipment offsite in a workshop. This simplifies transport to the site and minimises the skills needed onsite to install the facility 10. Once on site, electrical elements 20 are moved outside the hazardous area using the slide 40.

[0062] Mounting the electrical equipment 20 on a slide 40 allows the wellhead facility 10 to be as small as possible when in a transport mode, for transport to the site. The wellhead facility can then be converted into an operational mode once at the desired location. Without the use of the slide 40 the wellhead facility 10 would need to be much longer to comply with hazardous area requirements. In an alternative example embodiment, a hydraulic power unit or electrical power generator could be substituted for a transformer for sites without electrical reticulation.

[0063] One example embodiment of the present invention, which may be referred to as a low height version, is based on a half height Hi Cube ISO 20ft (6.058m length) shipping container. Another example embodiment is based on a full height ISO 20ft shipping container. In a preferred embodiment, the facility 10 conforms to the above size specifications when in a transport mode, but can then be extended or expanded into an operation mode once positioned onsite.

[0064] Some embodiments use an open frame design with removable top rails to allow access once onsite. Standard fork pockets are provided in the base to allow the facility to be moved as easily as possible during transport. Mount points are also provided on all sides to fit cladding options.

[0065] Some embodiments of the present invention are designed for CSC certification to allow top lifting for sea, rail and road transport. Such an embodiment is shown in Figure 7. These embodiments can be stacked as shown in Figure 8 and transported by road, for example, as shown in Figure 9.

[0066] Manufacturing the wellhead facility 10 in a containerised form has advantages including reduced logistic costs, no electrician required due to pre-wiring (“plug and play”), visually less obtrusive, simple to install, ability to be clad in various materials to reduce visual impact, and low cost mass production.

[0067] Containers are manufactured in volume as a standard design. Control and electrical elements are added during assembly. This is a very efficient process, however does mean that design of controls and/or electrics are optimised to the container so may be more difficult to vary.

[0068] A basic model of the wellhead facility 10 is a simple open design, similar to that shown in Figure 7, with the basic structure 25 only including a base 42, top rails 43, end rails 44, comer posts 45 and comer castings 46. Figures 24A to 24C also show an open design where the top rails 43, comer posts 45 and/or other members can be removed. Optional features may include cladding mount points, hinged rail access, shelving 47 and a solid wall 48 for separating the hazardous zone. Another alternative version could have bifold doors.

[0069] Over pressure protection is required to protect the gathering apparatus 15 or network from being damaged by “shut-in” pressure, where the pressure builds up at the wellhead 11 or upstream of any point in the system that is sealed, if a choke or control valve fails.

[0070] Referring to Figure 10, one example embodiment of the present invention provides twin control valves 22, 23 for redundancy. This negates the need for a pressure safety valve (PSV) or bursting disks to protect from over pressure events. Removing the need for these protection measures reduces maintenance intervals and reduces operating costs by not requiring regular inspections of PS Vs or bursting disks, while still providing the required protection against over pressure events.

[0071] The second control valve 23 is installed in the line adjacent to the first control valve 22. The feature works because if one control valve fails the other control valve will protect the system. PS Vs or bursting disks are generally used to protect the system in the event that the control valve fails. Despite the advantages of using twin control valves, an alternative embodiment of the invention can still be produced with PS Vs in the event that this is a specific client preference.

[0072] Prior art systems typically co-mingle water, gas and solids. The stream is processed by two or three phase separators that are then separated prior to supplying them to the gathering apparatus 15. Referring to Figure 11, in one example embodiment the present invention intends to achieve the same result in certain cases by introducing an oversize pipe section 50 that will reduce fluid velocity and pressure to achieve a similar result.

[0073] This embodiment will include less cost to manufacture, remove the need for pressure vessel inspections, and remove the need for PSVs or bursting disks. As there is less pressure and velocity drop there is also less pumping required. Advantages include that the oversize pipe section 50 is cheap and simple with relatively little maintenance required. The reduced inspection and maintenance requirement lowers costs and lowers the need for site visitation. This setup, however, may be less efficient than a separator and only works with separate water and gas streams.

[0074] The oversize pipe section 50 is implemented by bolting up to the line in the same way as a pressure vessel separator. This means that in an alternative embodiment, a pressure vessel separator can be substituted using the same connections if required for client preference.

[0075] As described above, the practice in the prior art is typically to co-mingle hydrocarbon products and produced water into a two or three phase separator for processing. The example embodiment is designed to keep these streams separated throughout the process with cross over lines providing a final level of separation.

[0076] Co-mingling of hydrocarbons and produced water into the pressure vessel separators results in a significant drop in stream velocity and pressure. Additional pumping or compression is therefore required to be introduced to restore the pressure and velocity to deliver the product to the gathering apparatus. In contrast, the example embodiment allows stream system pressure and velocity to be maximised throughout the process.

[0077] The advantages of this method include greater efficiency of fluid flow and no mechanical pumps being required. However, there may be less efficient solid removal resulting in some solids being carried through to the water gathering.

[0078] Optional features of the invention that might be added in other example embodiments include a booster component to extend the life of the well when flow rate tails off or to recombine flows of different pressures.

[0079] Yet other example embodiments may include various concealment options such as cladding 54, covers 55 and integrated fencing 56, such as those shown in Figures 12A to 12C.

[0080] Figures 13 to 18 illustrate the unloading and connection of a wellhead facility 10 at a wellhead site. The figures show the use of the flexible pipe sections 12 to connect to the wellhead 11 and the deployment of the electrical equipment 20.

[0081] Figures 19, 20A and 20B illustrate example schematic diagrams of example wellhead facilities 10. The diagrams indicate a number of sections that may be customised to suit client preferences. For example, Figure 20B illustrates an Option 1 that includes a standard connection while Option 2 includes a separator and sump pump. These Figures also show a number of other customisable sections as indicated by waved lines surrounding the particular components with optional scope.

[0082] In another example embodiment of the present invention, a small size pressure vessel is used in the processing component. For example, Figure 21 illustrates an embodiment with only a small pressure vessel 60, without the large pressure vessel 61 that can be seen in Figure 22.

[0083] Pressure vessels above a given capacity require increased maintenance frequency. Keeping the pressure vessel below this capacity increases the safety of the facility and reduces the maintenance costs by reducing the inspection frequency. This also decreases the proportion of time where the wellhead is not operational by reducing shutdown frequency.

[0084] Some preferred embodiments of the present invention may be considered “universal” wellhead facilities 10. These embodiments are particularly advantageous as they are suitable to a very wide range of raw gas conditions. This allows the facility 10 to be used with limited adjustments over the life of the well and also allows the same facility 10 to be supplied to many varying fields and well types.

[0085] Prior to a CSG well being drilled, assumptions about the properties of the well are made based on various factors, such as nearby wells, and measurements and expectations of the underlying ground structure. However, these predictions are not always accurate, resulting in a well with different operational requirements than expected.

[0086] The universal aspect of the wellhead facility 10 allows for much faster and cheaper implementation of the wellhead equipment in such a case. Rather than requiring supply of new wellhead equipment or the use of inappropriate equipment, the wellhead facility 10 is able to be used with a much wider range of wellhead conditions. Various features described throughout this specification contribute to the universality of the wellhead facility 10.

[0087] In a particular, but non-limiting embodiment, the wellhead facility 10 is constructed from a type of container as a starting point of manufacture or assembly, for example from a shipping container. This allows the wellhead facility to be relatively easily manufactured by cutting out or removing sections of the container, reinforcing the container, if required, and adding doors and other components as required, before or after installing the electrical, mechanical and processing equipment as necessary.

[0088] Throughout the specification the reference to a shipping container or intermodal container may include any suitable form of container. In one example aspect, a shipping container may refer to an intermodal container as typically used in containerised intermodal freight transport. Intermodal containers include those conforming to international standard ISO 6346, for example.

[0089] Embodiments of the wellhead facility in containerised form can be made to be standard sizes of typical shipping containers. For example, they may conform to the specification of a 20ft container (6.058m external length) or 40ft container (12.192m external length). However, non-standard sizes, for example lengths of 6 metre, 7 metre, 8 metre, etc., or any other lengths, can be made. Similarly, non-standard widths or heights can also be used.

[0090] It should be appreciated, however, that the wellhead facility can be made from individual components rather than being made from a shipping container. The frame can be modified or reinforced as required for suitable strengthening of the wellhead facility.

[0091] The wellhead facilities are designed to allow stacking of multiple units on top of each other, or to allow stacking of other containers on top of the wellhead facilities. Additional reinforcing frames can be provided if necessary.

[0092] The wellhead facility can be supported on different types of ground. The wellhead facility can be placed directly on a ground surface, if appropriate, or can be used with a footing or foundation system if required. Footing support is dependent on the nature of the ground, for example whether the wellhead facility is being placed on concrete slabs or soil.

[0093] The general basis for a containerised wellhead facility can be a shipping container, making the structure easy to manage, suitable to manoeuvre and transport, and relatively easily constructed. Materials used in the general structure of a containerised wellhead facility are commonly available.

[0094] Referring to Figure 23, one example embodiment is shown that demonstrates how the basic frame of the facility may be constructed in a form so that it can be split or separated after transportation, at the time of installation of the facility. Figure 23A shows the split design with the two components connected during transportation, whilst Figure 23B shows an enlarged view showing how the components may be bolted, latched or otherwise interconnected. Figures 23C and 23D show different views of the separated components, illustrating how they may interengage via connecting pins, latches, bolts, etc.

[0095] While the specific example embodiments described in the specification relate to gas wells, particularly CSG wells, it will be appreciated that the invention may be applied in many other situations. The wellhead facility may be simply referred to as a relocatable facility, where example embodiments include, but are not limited to, facilities for other types of wells, processing of gas or other products from sources other than wells, facilities for other purposes such as preparing wells, processing at other stages such as at a central collection location, and many other situations as would be appreciated by persons skilled in the art.

[0096] Optional embodiments of the present invention may also be said to broadly consist in the parts, elements and features referred to or indicated herein, individually or collectively, in any or all combinations of two or more of the parts, elements or features, and wherein specific integers are mentioned herein which have known equivalents in the art to which the invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.

[0097] Many modifications will be apparent to those skilled in the art without departing from the scope of the present invention.

Claims (22)

1. The claims defining the invention are as follows:

   1. A relocatable facility, including: an input connection means; an output connection means; an electrical component; and a processing component, wherein the relocatable facility is configured to be transported as a single unit.
2. 2. The relocatable facility according to claim 1, wherein the relocatable facility, when in a transport mode, is sized as an intermodal freight container and/or is contained within an intermodal freight container.
3. 3. The relocatable facility according to claim 2, wherein the relocatable facility, when in the transport mode, is sized as a half-height intermodal freight container.
4. 4. The relocatable facility according to any one of the preceding claims, wherein the relocatable facility is expandable once positioned at an onsite location.
5. 5. The relocatable facility according to any one of the preceding claims, wherein the electrical component is movable to a position outside a hazardous zone once the relocatable facility is positioned at an onsite location.
6. 6. The relocatable facility according to any one of the preceding claims, wherein the electrical component is slidably mounted.
7. 7. The relocatable facility according to any one of claims 1 to 5, wherein the electrical component is hinge mounted or formed in separable sections.
8. 8. The relocatable facility according to any one of the preceding claims, wherein the input connection means and/or the output connection means include flexible couplings.
9. 9. The relocatable facility according to any one of the preceding claims, wherein the input connection means includes a first stream and a second stream.
10. 10. The relocatable facility according to claim 9, wherein the first stream and the second stream remain separate.
11. 11. The relocatable facility according to any one of the preceding claims, wherein the processing component includes a twin control valve design.
12. 12. The relocatable facility according to any one of the preceding claims, further including a separator.
13. 13. The relocatable facility according to any one of the preceding claims, further including a booster means.
14. 14. The relocatable facility according to any one of the preceding claims, wherein the processing component includes a pressure vessel of a size that requires reduced inspection frequency.
15. 15. The relocatable facility according to any one of the preceding claims, wherein the relocatable facility is suitable for use with both flowing and powered gas wells.
16. 16. The relocatable facility according to any one of the preceding claims, wherein the wellhead facility is suitable for use with both fractured and non-fractured gas wells.
17. 17. The relocatable facility according to any one of the preceding claims, wherein the wellhead facility is suitable for use with both high and low flow gas wells.
18. 18. The relocatable facility according to any one of the preceding claims, wherein the wellhead facility is suitable for use with both high and low permeability gas wells.
19. 19. The relocatable facility according to any one of the preceding claims, wherein the wellhead facility is stackable in the transport configuration.
20. 20. The relocatable facility according to any one of the preceding claims, wherein the wellhead facility can be quickly connected and disconnected to the wellhead without fabrication of site specific pipework, and in a manner that facilitates relative movement between ground height on which the facility is supported and the wellhead height.
21. 21. The relocatable facility according to any one of the preceding claims, wherein the wellhead facility may include various concealment options such as cladding, covers, and integrated fencing, etc.
22. 22. A gas wellhead facility, substantially as defined according to any one of the preceding claims.