KR20170137699A - Hydraulic valve arrangement for subsea blowout preventers - Google Patents

Abstract

The blow-out preventer control system includes a valve block 29 having a solenoid valve face 33 and a hydraulic valve face 31. A solenoid valve cavity 49 extends from the solenoid valve surface into the valve block, each solenoid valve cavity including an electrically actuated solenoid valve 19. The hydraulic valve cavity extends into the valve block from the hydraulic valve surface, which includes the hydraulic valve 17, respectively. A solenoid valve supply passage (51) in the valve block engages each solenoid valve cavity. A solenoid valve pilot passage (61) in the valve block extends from one of the solenoid valve cavities to one of the hydraulic valves. The hydraulic valve supply passage 57 in the valve block engages each hydraulic valve cavity. The hydraulic valve outlet passage 59 extends from one of the hydraulic valve cavities of the valve block

Description

HYDRAULIC VALVE ARRANGEMENT FOR SUBSEA BLOWOUT PREVENTERS BACKGROUND OF THE INVENTION [0001]

Cross-reference to related application

This application claims priority to Provisional Application No. 62 / 093,200, filed December 17, 2014.

Technical field

The present invention relates to a petroleum and gas well drilling blowout preventer, and more particularly to a solenoid valve housing and a hydraulic valve mounting apparatus.

Offshore drilling requires a blowout protector connected to the drilling riser to control the well pressure. A typical undersea blowout protector ("BOP") may include one or more annular blowout protec- tors, several pipe rams, connectors for connection to wellhead equipment, quick release connectors for releasing the upper portion of the BOP and the drill- It has many components. Most of these components, also referred to as functions, are operated hydraulically.

The BOP has a control system, also referred to as a multiplex or Mux pod layout, for controlling these various functions by supplying the working fluid pressure to perform a particular function. The control system has a hydraulic valve, referred to as an SPM (sub-plate manifold) valve, which supplies the working fluid pressure to various BOP components. The control system includes a solenoid valve that sends a hydraulic pilot signal to one of the hydraulic valves upon receipt of the electrical signal.

In general applications, the cap portion of the hydraulic valve may require threading to the valve body, which may cause cross-threading and wear. Also. Some hydraulic valves are difficult to access because there may be redundant external piping sections connected to each individual pilot line. The construction of some related technologies requires the removal or relocation of the external piping to access the hydraulic valve for the purpose of replacing or repairing the valve. The facilities of the external piping generally have a limited time to be removed and mounted, and leakage may occur if improperly tightened.

The blow-out preventer control system includes a valve block having a hydraulic valve face. Electrically operated solenoid valves are secured to the valve block. The hydraulic valve cavity extends from the hydraulic valve surface into the valve block. The hydraulic valve is at least partially installed in the hydraulic valve cavity. The hydraulic valve cap is fixed to the hydraulic valve surface and covers the hydraulic valve cavity. The cap includes a piston chamber for sealingly accommodating the piston. The solenoid valve pilot passage in communication with the solenoid valve has a valve block portion in the valve block extending to the hydraulic valve surface. The pilot passage sealingly connects the valve block portion of the pilot passage and has a cap portion in the side wall of the cap leading to the piston chamber. When the solenoid valve is actuated electrically, the hydraulic pilot signal from the solenoid valve to the hydraulic valve moves the hydraulic valve.

The valve block may have a solenoid valve surface. The solenoid valve cavity extends from the solenoid valve surface into the valve block. The solenoid valve is mounted within the solenoid valve cavity. The valve block portion of the pilot passage has an inner end connecting the solenoid valve cavity. The solenoid valve supply passage may extend from the valve block to the solenoid valve cavity.

The hydraulic valve supply passage extends from the valve block to the hydraulic valve cavity. The hydraulic valve outlet passage extends within the valve block hydraulic valve cavity. The movement of the hydraulic valve in one direction selectively opens the hydraulic valve supply passage to the hydraulic valve outlet passage.

The valve block may have a plurality of solenoid valve cavities extending from the solenoid valve face into the valve block, respectively. The valve block may each have a plurality of hydraulic valve cavities each extending into the valve block from the hydraulic valve surface. Each of the caps of the hydraulic valve can be fixed to the hydraulic valve surface by a plurality of fasteners.

In one embodiment, the solenoid valve cavities are located side by side along the length of the valve block. The solenoid valve supply passage extends in the longitudinal direction within the valve block. The hydraulic valve cavities lie side by side along the length of the valve block. The hydraulic valve supply passage extends in the longitudinal direction within the valve block. The hydraulic valve supply passage may be parallel to the solenoid valve supply passage.

The valve block has a rear portion on the opposite side of the hydraulic valve surface. In the illustrated example, each of the hydraulic valve outlet passages extends from one of the hydraulic valve cavities to the rear portion.

In one embodiment, the valve block has two ends facing in opposite directions. The solenoid valve supply passage has an inlet at one of the ends. The hydraulic valve supply passage has an inlet at one of the ends.

A more particular description of the briefly summarized disclosure in such a manner as to provide a more complete understanding of the features, advantages and objects of the disclosure, as well as others thereof, which may be apparent to those skilled in the art, is set forth in part in the description which follows, May be provided by way of example with reference to the accompanying drawings. It should be understood, however, that the drawings are for the purpose of describing preferred embodiments of the present disclosure only and that the scope of the present disclosure should not be construed as admitting embodiments having equivalent effects.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic front view of an upper portion of a blow-out inhibitor control system in accordance with the present disclosure.
Figure 2 is a perspective view of one of the control modules of the control system of Figure 1;
Figure 3 is a cross-sectional view of the control module of Figure 2 taken along line 3-3 of Figure 2;

BRIEF DESCRIPTION OF THE DRAWINGS The method and system of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings in which embodiments are illustrated. The method and system of the present disclosure can be in many different forms and should not be construed as limited to the exemplary embodiments described herein; Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout.

1 schematically illustrates an upper part of a control system 11 for a subsea blowout protector (not shown). The undersea blowout protector ("BOP") has a number of configurations, such as one or more annular blowout protec- tors, several pipe rams, connectors for connection to well head equipment, quick release connectors for releasing the top of the BOP Element. Most of these components, also referred to as functions, are operated hydraulically. A control system 11, also referred to as a multiplex or MUX pod layout, is mounted to the BOP and controls these various functions by supplying a working fluid pressure to perform a particular function.

The control system 11 includes support frames 13 of various configurations. Some control modules (15) are mounted on the frame (13). Figure 1 shows only four control modules 15, and typically at least four times as many control modules as there are. The control module 15 may be mounted on the frame 13 up and down in one or more vertical columns, and Figure 1 illustrates two vertical columns.

Each control module 15 has a plurality of hydraulic valves 17, commonly referred to as SPM (sub-plate mounted) valves. Each hydraulic valve 17 controls the flow of the working fluid to one of the components of the blowout preventer to perform one of several functions. Each control module 15 has a plurality of solenoid valves 19 for controlling one of the hydraulic valves 17. The solenoid valve 19 is electrically operated to transmit the hydraulic pilot signal to the hydraulic valve 17. [ Although Figure 1 shows six hydraulic valves 17 and six solenoid valves 19 in each control module 15, the number may vary. Each control module 15 has a solenoid valve housing 21 surrounding all the solenoid valves 19. The housing 21 accommodates an electrical insulating fluid which is pressure-compensated generally equivalent to the hydrostatic pressure of seawater. Each housing 21 may have a removable cover plate 23 to allow access to the solenoid valve 19 when the control system 11 is retrieved for maintenance. Fig. 1 shows one of the cover plates 23 cut out to illustrate the solenoid valve 19 inside. 3 illustrates a state in which the cover plate 23 is removed.

The control system 11 comprises two subsea electronics modules (SEM) 25, each mounted in a receptacle 27, which can be connected to the frame 13. Each SEM 25 has an electronic circuit that transmits signals to the various solenoid valves 19. The SEMs 25 are redundant to each other. In addition, all the control modules 15 in general are redundant with the other control modules 15.

Referring to Fig. 2, each control module 15 has a manifold or valve block 29, which can be a rigid single piece of steel alloy. The valve block 29 has a hydraulic valve surface 31 which is flat in this example and is located in a single plane extending the length of the valve block 29. The valve block 29 has a solenoid valve face 33 whose valve face is flat in this example and is located in a single plane extending the length of the valve block 29. The solenoid valve surface 33 is illustrated as the upper horizontal side of the valve block 29. The hydraulic valve surface 31 is illustrated as the vertical front of the valve block 29 in a plane perpendicular to the plane of the solenoid valve surface 33. The valve block 29 has two opposed ends 34.

Each hydraulic valve 17 has a separate cap 35 with a flange 37 and a cylindrical portion 39 extending outwardly from the flange 37. The fastener 41 extends through each flange 37 and secures the hydraulic valve cap 35 side by side with the hydraulic valve surface 31. Each solenoid valve 19 has a separate cover 43 fixed to the solenoid valve surface 33 as a fastener.

3, the valve block 29 also has a rear portion 45, which can be in a single vertical plane parallel to the hydraulic valve surface 31. As shown in Fig. In addition, the valve block 29 may have a flat bottom 47 in a single horizontal plane parallel to the solenoid valve face 33.

The solenoid valve surface 33 has a row of solenoid valve cavities 49 (only one shown in FIG. 3) extending along the length of the valve block 29. Each solenoid valve cavity 49 extends vertically from the solenoid valve surface 33 into the valve block 29. The solenoid valve cavity 49 may be identical. One of the solenoid valves 19 is fixed within each solenoid valve cavity 49. 3 illustrates one of the solenoid valves 19 shown schematically as the lower portion being engaged in the solenoid valve cavity 49 but the upper portion projecting at a short distance above the solenoid valve surface 33. The solenoid valve 19 may be secured within the solenoid valve cavity 49 in a variety of ways such as threads. The solenoid valve 19 may be identical and each has an electrical solenoid portion that, when activated by an electrical signal, moves the valve portion from the closed position to the open position.

The solenoid valve supply passage 51 extends longitudinally through the valve block 29 and traverses the lower end of each solenoid valve cavity 49. The solenoid valve supply passage 51 connects the respective solenoid valve cavities 49 together. The solenoid valve supply passage 51 has an inlet 53 (FIG. 2) at one of the valve block ends 34 that supply the working fluid pressure to each solenoid valve cavity 49.

The hydraulic valve surface 31 has a row of hydraulic valve cavities 55 (one shown in FIG. 3) extending along the length of the valve block 29. Each hydraulic valve cavity 55 extends into the valve block 29 perpendicular to the hydraulic valve surface 31. The axis of each hydraulic valve cavity 55 is perpendicular to the axis of each solenoid valve cavity 49 and intersects the axis of one of the solenoid valve cavities 49. The hydraulic valve cavity 55 may be identical. One of the hydraulic valves 17 is fixed in each hydraulic valve cavity 55. The inner portion of the hydraulic valve 17 is fitted in the hydraulic valve cavity 55, and the outer portion protrudes forward from the hydraulic valve surface 31. The hydraulic valve 17 may have various configurations and may be the same.

The hydraulic valve supply passage 57 extends longitudinally through the valve block 29 and intersects the lower side of each hydraulic valve cavity 55. The hydraulic valve supply passage 57 connects the respective hydraulic valve cavities 55 together. The hydraulic valve supply passage 57 has an inlet port 58 (FIG. 2) at one of the valve block ends 34 for supplying the hydraulic fluid pressure to each hydraulic valve cavity 55. The hydraulic valve supply inlet 58 may be on the same valve block end 34 as the solenoid valve supply passage inlet 53 as shown or alternatively on the opposite end 34. The hydraulic valve supply passage 57 is parallel to the solenoid valve supply passage 51 in the present embodiment.

An individual hydraulic valve outlet passage 59 extends from each hydraulic valve cavity 55 to the valve block back 45. The hydraulic valve outlet passage 59 is parallel to each other and substantially perpendicular to the hydraulic valve supply passage 57. A hydraulic line (not shown) functions by connecting each hydraulic valve outlet passage 59 to the components of the BOP. When one of the solenoid valves 19 sends a signal to one of the hydraulic valves 17, the hydraulic valve 17 is moved to the open position to release hydraulic pressure from the hydraulic valve supply passage 57 to the hydraulic valve outlet passages 59 One provides a working fluid. In another embodiment, when solenoid valve 19 is de-energized, the working fluid pressure in the BOP function configuration is released from hydraulic valve outlet passage 59 through an exhaust port (not shown) located on valve block 29 Can be discharged.

Individual pilot passages (61) extend from each solenoid valve cavity (49) to one of the hydraulic valve cavities (55). Each pilot passage 61 has an interior or valve block portion 61a extending from the solenoid valve cavity 49 to the hydraulic valve surface 31. Each pilot passage 61 has an outer or cap portion 61b coupled to the pilot passage interior 61a and extending into the side wall of the hydraulic valve cap 35. [ The side wall of each hydraulic valve cap 35 is connected to the upper side cylindrical portion 39 of the cap 35 parallel to the cylindrical portion 39 to form a ridge 63 As shown in FIG. The pilot passage outer side portion 61b extends in the ridge 63 which is coaxial with the pilot passage inner side portion 61a. The sealing portion (not shown) seals the joint portion between the pilot passage inner side portion 61a and the outer side portion 61b. The pilot passage 61 has a connecting portion 61c connected to the outer end of the pilot passage outer portion 61b and extending downward to the piston chamber 65 formed in the cylindrical portion 39 of the cap 35. [ The pilot passage connecting portion 61c is formed by perforating a hole perpendicular to the perforation hole forming the pilot passage outer portion 61b. After the punching of the connecting portion 61c, the technician will install the plug 66 to block the entry of the perforated hole forming connecting portion 61c. When one of the solenoid valves 19 is electrically operated, a hydraulic signal flows from the solenoid valve supply passage 51 to the piston chamber 65 through the pilot passage 61. Alternatively, a discharge passage (not shown) may extend through the valve block 29 so that pressure can be discharged from the hydraulic valve pilot passage 61 when one of the solenoid valves 19 is deactivated.

In this embodiment, the hydraulic valve 17 includes a fixed cage 67 located in the hydraulic valve cavity 55. The outer annular seal 69 seals the cage 67 against the cylindrical inner wall surface of the hydraulic valve cavity 55. The cage 67 forms therein a plurality of openings or ports 71 aligned with the hydraulic valve supply passage 57. The cage 67 has a rear end that abuts and seals against the rear end sheet 73 surrounding the inlet of the hydraulic valve outlet passage 59. The cage 67 has an opposite end that abuts and seals against the front end seat 75.

 The movable spool 77 is located within the cage 67 and is sealed by the inner annular seal 78. The spool 77 is moved relative to the cage 67 between the illustrated closed and open positions. In the illustrated closed position, the front end of the spool 77 is sealed against the front end seat 75. The closed position cuts off the flow of the working fluid from the hydraulic valve supply passage 57 into the inside of the spool 77. [ In the open position, the spool 77 abuts against the rear end seat 73 and is sealed. The working fluid flows from the hydraulic valve supply passage 57 through the cage port 71 into the spool 77 and out of the hydraulic valve outlet 59.

The stem portion 79 is connected to the spool 77 to move the spool 77. The stem portion 79 extends forward from the spool 77 into the cap piston chamber 65. The stem portion 77 has a piston 81 at the front end in the cap piston chamber 65. At least one concentric coil spring 83 (two shown) surrounds the stem portion 79 and urges the spool 77 toward the closed position. The spring housing 85 has a threaded portion 86 which surrounds a part of the spring 83 and is fixed to the screw of the hydraulic valve cavity 55. The spring housing (85) fixes the spring back retainer (87) to the front seat (75). The spring front retainer 89 is fixed to the stem portion 79 for movement therein. The stem portion 79 will slide relative to the spring back retainer 87 and the front seat 75. When the solenoid valve 19 is inactivated, the spring 83 returns the hydraulic valve 17 to the normal position.

In operation, an operator on the drilling rig responds to signal one of the control pods 25 and the control pod sends an electrical signal to one of the solenoid valves 19 in response. The solenoid valve 19 is moved to open the solenoid valve supply passage 51 to the pilot passage 61. The working fluid flows from the solenoid valve supply passage 51 to the piston chamber 65 through the pilot passage 61. [ The piston 81 moves the stem portion 79 and the spool 77 from the closed position to the open position shown in Figure 3 and the spool 77 is in contact with the rear end seat 73. [ The working fluid from the hydraulic valve supply passage 57 then flows into the inside of the spool 77 through the cage port 71 and out of the outflow passage 59. The working fluid functions as the BOP flows to the components.

When the discharge passage structure (not shown) is used, when the solenoid valve 19 is inactivated, the pilot passage 61 is opened to the discharge passage (not shown). Thereafter, the working fluid will flow through the piston chamber 65 and through the pilot passage 61 to the outside of the discharge passage. The spring 83 moves the stem portion 79 and the spool 77 from the open position to the closed position and causes the spool 77 to contact the front end seat 75. The working fluid pressure is then transferred from the hydraulic outlet 59 to the hydraulic valve discharge passage (not shown) to release pressure from the components of the BOP.

The internal passageway of the valve module disclosed in one of the embodiments eliminates the need for external piping to provide pilot pressure to the hydraulic valve. Some embodiments of the present disclosure include a bolt-engaging installation method for a hydraulic valve cap, which will facilitate assembly rather than the type of related art requiring rotation of the cap to secure the screw. The face-mounted cap eliminates the problems of cross-over spiral connection and wear caused by misalignment of the assembly during assembly of the assembly. The embodiments described and illustrated herein eliminate or reduce the need for an operator to remove components from the system to access the hydraulic valve. For example, the design of this disclosure can improve accessibility by removing hydraulic valves and piping in front of the accessory. The reliable access to the hydraulic valve thereby facilitates leakage detection, maintenance and repair and / or replacement of the valve. Embodiments of the present disclosure may also obviate the need to reposition the accessory that may result in leakage. It also leads to an increase in the advantageous reliability by overall reduction in the number of components of the system.

It is also to be understood that the scope of the present disclosure is not limited to the precise details of the structure, operation, precise material or embodiments shown and described, since modifications and equivalents will be apparent to those skilled in the art. In the drawings and specification, there have been disclosed exemplary embodiments and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (20)

A blow-out preventer control system comprising:
A valve block having a hydraulic valve surface;
An electrically operated solenoid valve fixed to the valve block;
A hydraulic valve cavity extending from the hydraulic valve surface into the valve block;
A hydraulic valve at least partially provided within said hydraulic valve cavity;
A hydraulic valve cap fixed to the hydraulic valve surface to cover the valve cavity;
A solenoid valve pilot passage communicating with the solenoid valve and having a valve block portion in the valve block extending to the hydraulic valve surface and communicating a hydraulic pilot signal from the solenoid valve when the solenoid valve is electrically activated, And a cap portion in a side wall of the cap leading to the inlet valve, wherein the valve block portion of the pilot passage is communicably connected to the solenoid valve pilot passage
≪ / RTI > The method according to claim 1,
The valve block having a solenoid valve surface;
A solenoid valve cavity extends from the solenoid valve surface into the valve block;
Said solenoid valve being mounted within said solenoid valve cavity;
Wherein the valve block portion of the pilot passage has an inner end joining the solenoid valve cavity. The method according to claim 1,
A hydraulic valve supply passage extends into the hydraulic valve cavity within the valve block;
A hydraulic valve outlet passage extending within the valve block hydraulic valve cavity;
And the movement of the hydraulic valve in one direction selectively opens the hydraulic valve supply passage to the hydraulic valve outlet passage. The method according to claim 1,
The valve block having a solenoid valve surface;
A solenoid valve cavity extends from the solenoid valve surface into the valve block;
The solenoid valve being mounted within the solenoid valve cavity;
The valve block portion of the pilot passage having an inner end joining the solenoid valve cavity;
A solenoid valve supply passage extending into the solenoid valve cavity within the valve block;
Wherein operation of the solenoid valve causes flow of the working fluid from the solenoid valve supply passage into the pilot passage. The method according to claim 1,
A hydraulic valve supply passage extends into the hydraulic valve cavity within the valve block;
A hydraulic valve outlet passage extending within the valve block hydraulic valve cavity;
The valve block having a solenoid valve surface;
A solenoid valve cavity extends from the solenoid valve surface into the valve block;
The solenoid valve being mounted within the solenoid valve cavity;
The valve block portion of the pilot passage having an inner end joining the solenoid valve cavity;
Wherein the solenoid valve supply passage extends into the solenoid valve cavity within the valve block. A blow-out preventer control system comprising:
A valve block having a solenoid valve surface and a hydraulic valve surface;
A plurality of solenoid valve cavities extending from the solenoid valve face into the valve block;
A plurality of electrically actuated solenoid valves each fixed within one of said solenoid valve cavities;
A plurality of hydraulic valve cavities extending from the hydraulic valve surface into the valve block;
A plurality of hydraulic valves each fixed within one of said hydraulic valve cavities;
A solenoid valve supply passage in said valve block for coupling each said solenoid valve cavity to provide a pilot supply of working fluid to each said solenoid valve;
A plurality of solenoid valves in said valve block each extending from one of said solenoid valve cavities to one of said hydraulic valves to provide a hydraulic pilot signal to one of said hydraulic valves when one of said solenoid valves is actuated; Pilot path;
A hydraulic valve feed passage in said valve block for engaging each of said hydraulic valve cavities to provide a working fluid feed to each of said hydraulic valves;
A plurality of hydraulic valve outlet passages respectively extending from one of the hydraulic valve cavities to the outside of the valve block, wherein when one of the hydraulic valves receives one of the pilot signals, A plurality of hydraulic valve outlet passages for flowing the working fluid out of one of the hydraulic valve outlet passages,
≪ / RTI > The method according to claim 6,
Each of said hydraulic valves having a medial portion located within a cavity of one of said hydraulic valve cavities and an outward portion protruding outwardly from said valve block; The system comprises:
And a cap fixed to the hydraulic valve surface and surrounding an outer portion of one of the hydraulic valves;
Each of said pilot passages has a valve block portion in said valve block and a cap portion in a side wall of said cap;
Wherein the valve block portion of each of the pilot passages sealingly engages one of the pilot passages on the hydraulic valve surface. The method according to claim 6,
Each of said hydraulic valves having a medial portion located within one of said hydraulic valve cavities and an outward portion protruding outwardly from said valve block; The system comprises:
Further comprising: a plurality of caps secured to the hydraulic valve surface by a plurality of fasteners, respectively, and surrounding an outer portion of one of the hydraulic valves;
Each of said pilot passages having a valve block portion in said valve block and a cap portion in a sidewall of one of said caps;
Wherein the valve block portion of each of the pilot passages is sealingly fitted with the cap portion of one of the pilot passages on the hydraulic valve surface. The method according to claim 6,
The solenoid valve cavities being provided along the length of the valve block;
Wherein the solenoid valve supply passage extends longitudinally within the valve block. The method according to claim 6,
The hydraulic valve cavities being provided along the length of the valve block;
Wherein the hydraulic valve supply passage extends in the longitudinal direction within the valve block. The method according to claim 6,
The solenoid valve cavities being provided along the length of the valve block;
The solenoid valve supply passage extending longitudinally in the valve block;
The hydraulic valve cavities being provided along the length of the valve block;
Wherein the hydraulic valve supply passage extends longitudinally in the valve block parallel to the solenoid valve supply passage. The method according to claim 6,
The valve block has a rear portion opposite to the hydraulic valve surface;
Each of said hydraulic valve outlet passages extending from one of said hydraulic valve cavities to a rear portion thereof. The method according to claim 6,
The valve block having two ends facing in opposite directions;
The solenoid valve supply passage having an inlet at one of the ends;
And the hydraulic valve supply passage has an inlet at one of the ends. A blow-out preventer control system comprising:
A valve block having a solenoid valve surface and a hydraulic valve surface;
A plurality of solenoid valve cavities extending from the solenoid valve face into the valve block and spaced apart along the length of the valve block;
A plurality of electrically actuated solenoid valves each secured within a cavity of one of said solenoid valve cavities;
A plurality of hydraulic valve cavities extending from the hydraulic valve surface into the valve block and spaced apart along the length of the valve block;
A plurality of hydraulic valves each having an inner portion fixed inside the cavity of one of the hydraulic valve cavities and an outer portion protruding from the hydraulic valve face and having a piston;
A plurality of hydraulic valve caps each fixed to the hydraulic valve surface and each having a piston chamber for sealingly accommodating one of the hydraulic valves;
A solenoid valve supply passage in said valve block for coupling each said solenoid valve cavity to provide a pilot supply of working fluid to each said solenoid valve;
A plurality of solenoids each having an OK valve block within the valve block and each extending from one of the solenoid valve cavities to the hydraulic valve surface and extending into one of the piston chambers in one of the sidewalls of the cap, Valve pilot passage;
A hydraulic valve feed passage in said valve block for engaging each of said hydraulic valve cavities to provide a working fluid feed to each of said hydraulic valves;
A plurality of hydraulic valve outlet passages respectively extending from one of the hydraulic valve cavities to the outside of the valve block, wherein when one of the hydraulic valves receives one of the pilot signals, A plurality of hydraulic valve outlet passages for flowing the working fluid out of one of the hydraulic valve outlet passages,
≪ / RTI > 15. The method of claim 14,
The solenoid valve supply passage extending longitudinally within the valve block;
Wherein the hydraulic valve supply passage extends longitudinally in the valve block parallel to the solenoid valve supply passage. 15. The method of claim 14,
The valve block has a rear portion opposite to the hydraulic valve surface;
Each of said hydraulic valve outlet passages extending from one of said hydraulic valve cavities to said rear portion. 15. The method of claim 14,
The valve block having two ends facing in opposite directions;
The solenoid valve supply passage having an inlet at one of the ends;
And the hydraulic valve supply passage has an inlet at one of the ends. The method according to claim 14,
Further comprising: a plurality of solenoid valve covers mounted on the solenoid valve surface on one of the solenoid valves, respectively. 15. The method of claim 14,
A plurality of solenoid valve covers mounted on the solenoid valve surface on one of the solenoid valves, respectively;
And a solenoid valve housing mounted on the solenoid valve surface and surrounding the plurality of solenoid valve covers. 15. The method of claim 14,
Wherein the solenoid valve surface and the hydraulic valve surface are in a plane perpendicular to each other.

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