Modular single header manifold

Abstract

The present invention relates to hydrocarbon well fluid manifold module (1) with a manifold module housing (9) having a transversal bore terminating in a longitudinal bore (3) in fluid connection with the transversal bore (6). One or more cut off valves are located (7) in the transversal bore (6). The longitudinal bore (3) extend through the module housing (9) and form a first flow port (11) and a second flow port (12) aligned with the first flow port (11). Plane, connecting surfaces surround the two flow ports (11,12). The two flow ports and connecting surfaces are identical. The first connecting surface (13) and the second connecting surface (14) are adapted to be connected to at least one further similar manifold module (20). The invention also concerns a manifold for a hydrocarbon well assembled of such modules.

Claims

1. A hydrocarbon well fluid manifold assembly comprising: a plurality of hydrocarbon well fluid manifold modules, including at least a first and a second well manifold module, each comprising: a manifold module housing having a transversal bore terminating in a longitudinal bore perpendicular to and in fluid connection with the transversal bore, wherein the longitudinal bore extends through the manifold module housing forming a first flow port and a second flow port aligned with the first flow port; at least one cut off valve adapted to be actuated by an actuator in the transversal bore; a fluid port with a connection adapted for coupling the transversal bore to a well; and a first plane connecting surface surrounding the first flow port and a second plane connecting surface surrounding the second flow port, wherein the first plane connecting surface is parallel to and similar with the second plane connecting surface; a termination element in sealing contact with the second plane connecting surface of the first manifold module; and a valve in sealing contact with a connecting surface of one of the plurality of hydrocarbon well fluid manifold modules, wherein the first plane connecting surface of the first well manifold module is in sealing contact with the first plane connecting surface of the second well manifold module.

2. The hydrocarbon well fluid manifold of claim 1, wherein the plurality of hydrocarbon well fluid manifold modules are identical.

3. The hydrocarbon well fluid manifold of claim 1, wherein the termination element is a sealing blanking plate or a header connection module.

Description

SHORT DESCRIPTION OF THE ENCLOSED DRAWINGS

(1) FIG. 1 is a perspective view of a manifold module of the invention;

(2) FIG. 2 is a cross section of a manifold module housing of the invention;

(3) FIG. 3 shows two similar manifold modules of the invention fixed to each other;

(4) FIG. 4 shows four similar manifold modules of the invention assembled to a manifold;

(5) FIG. 5 shows a header isolation valve module; and

(6) FIG. 6 corresponds to FIG. 4, but shows a blanking plate in place of a header connection module.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION WITH REFERENCE TO THE DRAWINGS

(7) FIG. 1 is a perspective view of a manifold module 1 of the invention. The manifold module 1 is formed as a manifold module housing 9 forming a standard block with standardised dimensions and connections, enabling the assembly of a modular system. The manifold module housing 9 is formed as a rectangular block with right angled sides and includes three ports 10, 11 and two cut off valve actuators 2 actuating two cut off valves inside the manifold module housing 9. (The third port is not shown on FIG. 1) Two cut off valve actuators 2 and cut off valves provides a failsafe system with one redundant valve and actuator assembly. An alternative embodiment (not shown) includes one cut off valve actuator 2 and one ROV actuated cut off valve. The manifold module housing 9 includes a branch port 10, a first header port 11 and a second header port (not shown) corresponding to and identical with the first header port. The header ports 11 are adapted to connect the manifold module 1 to other similar or identical manifold modules, a header connection module, a header connection valve module or a blinding element, closing a header port 11.

(8) The manifold module can be used both in an injection manifold and a production manifold, and the ports have therefore not been defined as inlet ports or outlet ports. In a production manifold, will however the branch port 10 be an inlet port, and the produced fluid will exit through a header port. In an injection manifold, will however, the branch port 10 be an exit port.

(9) The first and second header ports 11 are surrounded by first and second plane, parallel connecting and sealing surfaces 13, facing away from each other, located at each side of the rectangular manifold module housing 9. Metal seals are typically used on the interface to ensure proper sealing and to prevent leaks.

(10) The first and second header ports 11 are connected by a header bore 3 extending through the manifold module housing 9. Four module connection holes 4 extending parallel to the header bore 3 also extend through the manifold module housing to allow bolts or other mechanical fastening means to extend through the holes for fastening purposes. A connection guiding system 21 is bolted to the manifold module housing 9. The connection guide system 21 includes elements allowing the use of a ROV to connect a line to/from a hydrocarbon well. These connections are typically standardized connections. A connection hub 5 also forms a part of the connection to a line to/from a hydrocarbon producing well. The connection hub 5 may be a part of the manifold module housing 9 or may be bolted on to the housing as a separate unit. A branch hole 6 extending from the branch port 10 provides a flow path past the two cut-off/isolation valves and into the header bore.

(11) FIG. 2 is a cross section of the manifold module housing 9 and shows the header bore 3 and the four module connection holes 4. The manifold module housing 9 includes two isolation valve cavities 8 for the two isolation valves 7. The isolation valves 7 are included to enable isolating each hydrocarbon well connected to the manifold individually. The branch hole 6 extends from the branch port 10, past the valve cavities 8 and into the header bore 3. The branch hole 6 and the header bore 3 form a T when seen in a view perpendicular to the view on FIG. 2. (from the top or bottom) The branch connection hub is formed in the extension of the branch hole 6. The housing is a one-piece housing formed as a unitary solid steel block that will be heat treated according to required specifications.

(12) FIG. 3 shows two similar manifold modules 1 of the invention fixed to each other, aligning the respective connecting and sealing surfaces, header ports and thus header bores. The header bore that is formed is straight and has a uniform diameter along the bore. The two adjoining manifold modules 1 are assembled with their respective branch ports facing in opposite directions and away from each other to allow the connection guide system 21 to be situated in an open space next to or between each manifold module housing. The two valve actuators 2 may be identical or of different types.

(13) FIG. 4 shows four similar manifold modules 1 of the invention assembled to a manifold 22. A header connection module 16 is attached to one of the two header bore ends and a header isolation valve 15 is attached to the other of the two header bore ends. The first and second connecting surfaces of each manifold module 1 are connected to connecting surfaces of adjoining modules and form module interfaces 17 sealed with metal seals. The header bores of each of the four manifold modules 1 form one straight bore with uniform diameter along the bore.

(14) The alternate positioning of the manifold modules with respective branch ports 10 face in opposite directions and away from each other to provide open spaces 20 allowing room for the connection guide system.

(15) The header connection module can be substituted by a blind plug or blanking plate. Alternatively may a blind plug be installed on the header connection module.

(16) FIG. 5 shows a header isolation valve module 15 with a cut off valve actuated by a header isolation valve actuator 23 and a connection guide system 21. The diameter of the bore of the header isolation valve module 15 corresponds to the bore of the header, and the header isolation valve module 15 includes a header isolation valve module connecting surface corresponding to the first and second connecting surfaces 13, 14 of each manifold module.

(17) The header isolation valve module 15 allows the entire manifold to be isolated.

(18) The longitudinal bore/header bore typically has an internal diameter in the range from 8-16″ (203 mm-406 mm) and the transversal bore/branch holes have an internal diameter in the range from 5-8″ (127 mm-203 mm).

(19) In FIG. 6, the header connection module 16 shown on FIG. 4 is substituted with a blanking plate 24 sealing the header bore, serving as the termination element.

(20) TABLE-US-00001  1 Manifold module  2 Isolation valve actuator  3 Header bore/longitudinal bore  4 Module connection hole  5 Connection hub  6 Branch hole/transversal bore  7 Isolation valve  8 Isolation valve cavity  9 Manifold module housing 10 Branch port 11 First header port 12 Second header port 13 First connecting surface 14 Second connecting surface 15 Header isolation valve module 16 Header connection module 17 Module interface 18 Metal seal 19 Straight header bore 20 Open space between blocks 21 Connection guide system 22 Manifold 23 Header isolation valve actuator 24 Blanking plate