FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE
Specification
(See Section 10 and Rule 13)
BYPASS SYSTEM FOR SUB - SEA DISTRIBUTOR
RELIANCE INDUSTRIES LIMITED
an Indian Company, of 3rd Floor, Maker Chamber-IV, 222, Nariman Point, Mumbai-400021,
Maharashtra, India Inventors:
1. VENTRAPRAGADA Sivarama Krishna
2. PUTHANKOVILAKAM Jayakrishnan
3. RAMA Sumit Yogendra Prasad
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE NATURE OF THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

FIELD OF THE DISCLOSURE
The present disclosure relates to the field of leakage containment in sub - sea distributor system.
BACKGROUND
A complex piping network of a sub - sea distributor is used for transporting hydrocarbon, such as. Mono Ethylene glycol (MEG) to a well located on the sea bed. There are numerous weld areas in the piping network wherein leakages may occur over a period of time. Leakage of MEG and non-injection of MEG poses increased risk of hydrates formation by reaction of hydrocarbon with water. The hydrate formation causes blockage of the piping network and leads to shutdown of the plant where MEG is used, in order to remediate the formation of hydrate so that further supply of MEG is resumed. Thus, in the case of leakage in the piping network of the sub-sea distribution assembly, production is required to be stalled until the leakage is rectified. Since, a major portion of the piping network is submerged underwater, rectifying the leakage is time consuming and adversely interrupts production and business for an extended period of time.
Accordingly, attempts have been made to develop systems for sealing leakage in piping network.
For example, PCT publication No. WO2011143781 discloses a diverter apparatus mounted on a pipeline for transporting fluid. The diverter apparatus is mounted on the upstream side of a pinching apparatus which enables sealing the pipeline in the event of a leakage in the pipeline. The pinching apparatus is mounted at a point upstream of the point of leakage. The diverter apparatus includes a pipe clamping section having a seal to engage with the outer wall of the pipeline at a point on the upstream side of the pinching apparatus. The seal isolates a section of the wall of the pipeline. The pipe clamping section is provided with a conduit branched into two parts- one branch

serves to divert liquid from the pipeline to a desired location while the other branch houses a drilling device for drilling the pipe for allowing the fluid from the pipeline to flow to a desired location. However, it has been observed that conventional mechanisms such as the diverter' apparatus of WO2011143781 are plagued with several drawbacks. One drawback is that the conventional assemblies are bulky due to inclusion of a hot tap machine along within the diverter. Hence, the conventional assemblies are cumbersome to be precisely installed on an underwater pipeline.
Hence, there is felt a need for a system for overcoming the drawbacks of the prior art systems.
OBJECTS
Some of the objects of the system of the present disclosure, which at least one embodiment herein satisfies, are as follows:
An object of the present disclosure is to provide a system of by-passing flow of fluid from a point of leakage.
Another object of the present disclosure is to provide a system which prevents shut down of a pipeline network during repair and maintenance for a subsea distribution assembly.
Yet another object of the present disclosure is to provide a system which eliminates stalling of production at the delivery terminal due to stalling of supply of fluids such as hydrocarbon during repair and maintenance of the hydrocarbon transporting pipeline.
Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present disclosure.

SUMMARY
In accordance with the present disclosure there is provided a by-pass system for transporting fluids such as hydrocarbon via a sub-sea distribution assembly having at least one pair of a primary filter and a secondary filter, each co-operating with respective testing and flushing assembly, the arrangement comprises:
a first lead; and
a second lead fluidly communicating with the first lead via a hose,
wherein the first lead and the second lead are adapted to be fitted at respective connecting points between the primary filter and the secondary filter.
Typically, each of the first lead and the second lead includes an inlet and outlet.
Typically, the first lead and the second lead are press-fitted to the respective connecting points.
Alternatively, the first lead and the second lead are threadably fitted at the respective connecting points.
Typically, each of the first lead and the second lead defines a hollow space therewithin, for communicating hydrocarbon through the hose.
Each of the first lead and the second lead may include a check valve for regulating the flow capacity and maintaining minimum pressure drop.
Optionally, the system includes at least one of a valve and sensor for manual and automatic intervention in actuating and operating the by-pass system in an event of leakage or blockage.
Each of the first lead and the second lead may be associated with respective the connecting points via an adaptor plate.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
The bypass system for sub-sea distributor of the present disclosure will now be described with the help of accompanying drawings, in which:
Figure 1 illustrates the by-pass system in accordance with the present disclosure;
Figure 2 illustrates a retrievable integrated mechanical stab plate for by passing fluids from a damaged pipeline to a secondary pipeline;
Figure 3 illustrates the by-pass system cooperating with a pair of retrievable integrated mechanical stab plates for bypassing fluids between a primary pipeline and a secondary pipeline; and
Figure 4 illustrates the by-pass system of Figure 1 cooperating with a retrievable integrated mechanical stab plate for bypassing fluids within a pipeline.
DETAILED DESCRIPTION
A system and a method of the present disclosure will now be described with reference to the embodiments which do not limit the scope and ambit of the disclosure.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

Referring to the accompanied drawings, a bypass system for sub-sea distributor, in accordance with the present disclosure is generally indicated by the reference numeral 10 and is particularly shown in Figure 1 of the drawing. The by-pass system (10) of the present disclosure, illustrated in Figure 1, enables isolation of the portion of the transportation pipeline downstream of a point of leakage and by-pass the flow of fluid, typically hydrocarbon, to a secondary filter. The by-pass system (10) includes a first lead (12) and a second lead (14). The first lead (12) and the second lead (14) are in fluid communication with each other via a connecting hose (16). The material of the connecting hose (16) and the shape and dimension thereof are variable corresponding to requirements. The connecting hose (16) cooperates with the first lead (12) and the second lead (14) via suitable fitting. Each of the first lead (12) and the second lead (14) define a hollow space therewithin for communicating fluid through the hose (16). The by-pass system (10) includes a valve and/or a sensor for manual and automatic intervention in actuating and operating the by-pass system (10) in an event of leakage or blockage.
A transportation pipeline enables supplying fluids, such as Mono Ethylene glycol (MEG), from a delivery terminal to a receiving terminal via an underwater pipeline network, having at least one primary pipeline and at least one secondary pipeline. At least a portion of the transportation pipeline is located above water. The transportation pipeline typically includes at least six 2-inch pipeline receiving MEG from a delivery terminal. The primary pipeline and the secondary pipeline receive MEG from the delivery terminal. The primary pipeline is formed by at least four of the six 2-inch pipelines which supplies fluid to a 3-inch pipeline through a first header. Similarly, the secondary pipeline is formed by the remaining two of the six 2-inch pipelines that supplies fluid to another 3-inch pipeline through a second header. The first header and the second header cooperate with a primary filter and a secondary filter respectively via their respective Y-blocks. Each of the Y-blocks bifurcate the flow of fluids through the 3-inch pipelines to be supplied to the primary filter and the secondary filter through associated Y-blocks. The filtered fluid from the primary filter and the secondary filter is supplied to a subsea well.

The primary pipeline and the secondary pipeline are assembled by weld joints that are provided between:
the first header or the second header with the respective 3-inch pipelines;
the 3-inch pipelines and the associated Y-block; and • the primary filter and the secondary filter with their associated Y-blocks. The weld joints are subject to leak due to several reasons. The fluid tends to leak from the damaged weld joints and since the weld joints are located underwater, the leaking fluid reacts with water to form hydrates. The leakage of the leak due to corrosion and are required to be rectified.
On detection of a leakage in the primary pipeline, a retrievable integrated mechanical stab plate (RIMS) (2), illustrated in Figure 2, is mounted on the primary pipeline by punching the leaking pipe at a point, upstream of the leakage, as illustrated in Figure 3. Another RIMS (4) is fitted to the secondary pipeline. Each of the RIMS (2 and 4), includes a plurality of connecting points, such as, a pair of inlet port (3), a pair of outlet port (5) and a receptacle (6 and 8). The first lead (12) and the second lead (14) of the by-pass system (10) are press-fitted into an outlet port (5) of the RIMS (2) and an inlet port (3) of the RIMS (4), shown in Figure 3, for bypassing the flow of fluid from the primary pipeline to the secondary pipeline, as illustrated in Figure 3. Similarly, in case leakage of fluid is detected in the secondary pipeline, the fluid is bypassed from the secondary pipeline to the primary pipeline.
Alternatively, in case leakage of fluid is detected from "a pipe in the primary pipeline or the secondary pipeline, the flow of the fluid is required to be by-passed to another pipe of the same pipeline, that is, either the primary pipeline or the secondary pipeline, as illustrated in Figure 4. By-passing of the fluid within the primary pipeline or the secondary pipeline, is carried out by installing an RIMS (2) on the leaking pipe of the primary pipeline or the secondary pipeline, at a point upstream of the point of leakage. The first lead (12) and the second lead (14) of the by-pass system (10) are press-fitted to an outlet port (5) of the RIMS (4) and an inlet port (3) of the RIMS (2), respectively, for bypassing the flow of fluid from the leaking pipe to an alternate pipe

of the primary pipeline or the secondary pipeline via the receptacle (6) or the receptacle (8). Such an arrangement may be achieved through one or more hose pipes. Specifically, the hose pipe (18) connects the receptacle (6) to the hot stab receptacle (22). Typically, the hose pipe (18) is 1 m long. Similarly, the hose pipe (20) connects the receptacle (8) to the hot stab receptacle (24). Typically, the hose pipe (20) is 1 m long.
The first lead (12) and the second lead (14) communicate the fluid from a primary filter and the secondary filter associated with the primary pipeline and the secondary pipeline respectively. As illustrated in Figure 4, the first lead (12) and the second lead (14) cooperate with the respective connecting points via adaptors associated with the RIMS (2). This allows for bypassing the fluid between the primary pipeline and the secondary pipeline depending on the pipeline undergoing maintenance. Alternatively, the by-pass system (10) enables bypassing of the fluid between pipes of the primary pipeline or the secondary pipeline and between two transportation pipelines.
Without departing from the scope of the present invention, the first lead (12) and the second lead (14) may be press-fitted to one of the outlet port (5) of the RIMS (4) and the inlet port (3) of the RIMS (2), respectively; and the outlet port (5) of the RIMS (2) and the inlet port (3) of the RIMS (4), respectively, depending on the pipeline leakage. Alternately, the second lead (14) and the first lead (12) may be press-fitted to one of the outlet port (5) of the RIMS (4) and the inlet port (3) of the RIMS (2), respectively; and the outlet port (5) of the RIMS (2) and the inlet port (3) of the RIMS (4), respectively, depending on the pipeline leakage.
Thus, the by-pass system (10) of the present disclosure eliminates shutdown of the transportation pipeline during repair and maintenance. This eliminates stalling of production at the delivery terminal. Further, the by-pass arrangement (10) of the present disclosure enables averting the risk of hydrate formation.

TECHNICAL ADVANCEMENTS
The technical advancements offered by the by-pass system of the present disclosure include the realization of:
• eliminating shutdown of the transportation pipeline during repair and maintenance; and
• eliminating stalling of production at the delivery terminal due to stalling of supply of fluids/ compound such as hydrocarbon during repair and maintenance.
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression "at least" or "at least one" suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
The numerical values given of various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher or lower than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the disclosure unless there is a statement in the specification to the contrary.
Wherever a range of values is specified, a value up to 10% below and above the lowest and highest numerical value respectively, of the specified range, is included in the scope of the disclosure.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless

the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having," are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on", "engaged to", "connected to" or "coupled to" another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly engaged to", "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

Spatially relative terms, such as "inner," "outer," "beneath", "below", "lower". "above", "upper" and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the system/ device in use or operation in addition to the orientation depicted in the figures. For example, if the system/ device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The system may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

WE CLAIM:
1. A by-pass system for transporting a fluid via a distribution assembly operable in a
fluid environment having at least one pair of a primary filter and a secondary filter,
each co-operating with respective testing and flushing assembly, said system
comprises:
a first lead; and
a second lead fluidly communicating with said first lead via a hose,
wherein said first lead and said second lead are adapted to be fitted at respective connecting points between the primary filter and the secondary filter.
2. The system as claimed in claim 1, wherein each of said first lead and said second lead includes an inlet and outlet.
3. The system as claimed in claim 1, wherein said first lead and said second lead are press-fitted to said respective connecting points.
4. The system as claimed in claim 1, wherein said first lead and said second lead are threadably fitted at said respective connecting points.
5. The system as claimed in claim 1, wherein each of said first lead and said second lead define a hollow space therewithin, for communicating the fluid through said hose.
6. The system as claimed in claim 1. wherein each of said first lead and said second lead include a check valve for regulating the flow capacity and maintaining minimum pressure drop.

7. The system as claimed in claim 1 further includes at least one of a valve and a sensor for manual and automatic intervention in actuating and operating said by-pass system.
8. The system as claimed in claim 1, wherein each of said first lead and said second lead are associated with an adaptor plate.