CA2506828C - Blow out preventer with telescopic conductor tube assembly - Google Patents
Blow out preventer with telescopic conductor tube assembly Download PDFInfo
- Publication number
- CA2506828C CA2506828C CA002506828A CA2506828A CA2506828C CA 2506828 C CA2506828 C CA 2506828C CA 002506828 A CA002506828 A CA 002506828A CA 2506828 A CA2506828 A CA 2506828A CA 2506828 C CA2506828 C CA 2506828C
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- conductor tube
- hydraulic fluid
- closure
- piston
- flow path
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- 239000004020 conductor Substances 0.000 title claims abstract description 72
- 239000012530 fluid Substances 0.000 claims abstract description 88
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000013459 approach Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
- E21B33/062—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Actuator (AREA)
- Fluid-Damping Devices (AREA)
Abstract
A blow out preventer with a telescopic conductor tube assembly having a first conductor tube connected to the body and a second conductor tube connected to a closure providing access to the hydraulic rams. In a first operating mode, a closure lock prevents telescopic movement of the conductor tube assembly and by selecting to supply hydraulic fluid to either a first flow path or a second flow path the hydraulic rams can be moved to either an open or a closed position. In the second operating mode, by selecting to supply hydraulic fluid to either the first flow path or the second flow path telescopic movement of the conductor tube assembly can be effected to either open or close the closure.
Description
TITLE OF THE INVENTION:
Blow Out Preventer with Telescopic Conductor Tube Assembly FIELD OF THE INVENTION
The present invention relates to a blow out preventer used to stem the flow of fluids from an oil or gas well.
BACKGROUND OF THE INVENTION
Movement of rams and closure doors of a blow out preventer is effected through the use of a hydraulic pump that pumps hydraulic fluids through hydraulic lines. A
first set of hydraulic lines supply hydraulic fluid to move the rams between an open position and a closed position. A second set of hydraulic lines supply hydraulic fluid to move the closure door providing access for purpose of servicing and inspection between an open position and a closed position.
SUMMARY OF THE INVENTION
According to the present invention there is provided a blow out preventer which includes body having an interior cavity defining an axial flow passage and at least one pair of radial ram receiving passages intersecting the axial flow passage. A
ram passage closure is provided for a remote end of each of the ram receiving passages.
Each closure has an exterior face, an interior face, and a passage that extends between the exterior face and the interior face. A closure lock is provided having a locking position and a release position.
In the locking position, the closure is locked to the body. In the release position, the closure is free to move relative to the body. A hydraulic cylinder is mounted on the exterior face of each closure. The hydraulic cylinder has an interior side wall defining an interior cavity. A
piston is disposed within the interior cavity of the hydraulic cylinder and divides the hydraulic cylinder into a first chamber and a second chamber. The piston has a first face facing the first chamber and a second face facing the second chamber. A first hydraulic fluid port is adapted to permit hydraulic fluid to enter the first chamber and exert a force against the first face of the piston in order to cause the piston to move in a first direction. A
second hydraulic fluid port is adapted to permit hydraulic fluid to enter the second chamber and exert a force against
Blow Out Preventer with Telescopic Conductor Tube Assembly FIELD OF THE INVENTION
The present invention relates to a blow out preventer used to stem the flow of fluids from an oil or gas well.
BACKGROUND OF THE INVENTION
Movement of rams and closure doors of a blow out preventer is effected through the use of a hydraulic pump that pumps hydraulic fluids through hydraulic lines. A
first set of hydraulic lines supply hydraulic fluid to move the rams between an open position and a closed position. A second set of hydraulic lines supply hydraulic fluid to move the closure door providing access for purpose of servicing and inspection between an open position and a closed position.
SUMMARY OF THE INVENTION
According to the present invention there is provided a blow out preventer which includes body having an interior cavity defining an axial flow passage and at least one pair of radial ram receiving passages intersecting the axial flow passage. A
ram passage closure is provided for a remote end of each of the ram receiving passages.
Each closure has an exterior face, an interior face, and a passage that extends between the exterior face and the interior face. A closure lock is provided having a locking position and a release position.
In the locking position, the closure is locked to the body. In the release position, the closure is free to move relative to the body. A hydraulic cylinder is mounted on the exterior face of each closure. The hydraulic cylinder has an interior side wall defining an interior cavity. A
piston is disposed within the interior cavity of the hydraulic cylinder and divides the hydraulic cylinder into a first chamber and a second chamber. The piston has a first face facing the first chamber and a second face facing the second chamber. A first hydraulic fluid port is adapted to permit hydraulic fluid to enter the first chamber and exert a force against the first face of the piston in order to cause the piston to move in a first direction. A
second hydraulic fluid port is adapted to permit hydraulic fluid to enter the second chamber and exert a force against
2 the second face of the piston in order to cause the piston to move in a second direction. A ram is disposed in the passage of the closure. The ram has a first end and a second end. The first end extends into one of the ram receiving passages of the body. The second end is secured to the piston, such that movement of the piston results in movement of the ram. A
telescopic conductor tube assembly is provided having a dual walled first conductor tube which telescopically interacts with a dual walled second conductor tube. The first conductor tube is connected to the body and has an inner tube defining an inner passage and an outer sleeve defining an outer annular passage. The second conductor tube is connected to the closure and has an inner tube defining an inner passage and an outer sleeve defining an outer annular passage. Upon relative telescopic extension of the conductor tube assembly, the closure is carried by the second conductor tube away from the body. The conductor tube assembly defines a first tlow path along the inner passage of the first conductor tube and then along the outer annular passage of the second conductor tube to the first hydraulic fluid port. The conductor tube assembly also defines a second flow path along the outer annular passage of the first conductor tube and then along the inner passage of the second conductor tube to the second hydraulic fluid port. The conductor tube assembly has a first operating mode when the closure lock is in the locking position and a second operating mode when the closure lock is in the release position. In the first operating mode, when hydraulic fluid is supplied to the first flow path, the closure lock prevents telescopic movement of the conductor tube assembly and hydraulic fluid flows along the first flow path into the first hydraulic fluid port acting against the first face of the piston to cause the piston to move in the first direction, with hydraulic fluid being concurrently exhausted from the second chamber through the second fluid port passing along the second flow path. In the first operating mode, when hydraulic fluid is supplied to the second flow path, hydraulic fluid flows along the second flow path into the second hydraulic fluid port acting against the second face of the piston to cause the piston to move in the second direction, with hydraulic fluid being concurrently exhausted from the first chamber through the first fluid port passing along the first flow path.
In the second operating mode, when hydraulic fluid is supplied to the first flow path, hydraulic fluid flowing along the first flow path telescopically moves the conductor tube assembly carrying the closure away from the body to an open position while concurrently supplying hydraulic fluid to the hydraulic cylinder. In the second operating mode, when hydraulic fluid is supplied to the second flow path, hydraulic fluid flowing along the second flow path
telescopic conductor tube assembly is provided having a dual walled first conductor tube which telescopically interacts with a dual walled second conductor tube. The first conductor tube is connected to the body and has an inner tube defining an inner passage and an outer sleeve defining an outer annular passage. The second conductor tube is connected to the closure and has an inner tube defining an inner passage and an outer sleeve defining an outer annular passage. Upon relative telescopic extension of the conductor tube assembly, the closure is carried by the second conductor tube away from the body. The conductor tube assembly defines a first tlow path along the inner passage of the first conductor tube and then along the outer annular passage of the second conductor tube to the first hydraulic fluid port. The conductor tube assembly also defines a second flow path along the outer annular passage of the first conductor tube and then along the inner passage of the second conductor tube to the second hydraulic fluid port. The conductor tube assembly has a first operating mode when the closure lock is in the locking position and a second operating mode when the closure lock is in the release position. In the first operating mode, when hydraulic fluid is supplied to the first flow path, the closure lock prevents telescopic movement of the conductor tube assembly and hydraulic fluid flows along the first flow path into the first hydraulic fluid port acting against the first face of the piston to cause the piston to move in the first direction, with hydraulic fluid being concurrently exhausted from the second chamber through the second fluid port passing along the second flow path. In the first operating mode, when hydraulic fluid is supplied to the second flow path, hydraulic fluid flows along the second flow path into the second hydraulic fluid port acting against the second face of the piston to cause the piston to move in the second direction, with hydraulic fluid being concurrently exhausted from the first chamber through the first fluid port passing along the first flow path.
In the second operating mode, when hydraulic fluid is supplied to the first flow path, hydraulic fluid flowing along the first flow path telescopically moves the conductor tube assembly carrying the closure away from the body to an open position while concurrently supplying hydraulic fluid to the hydraulic cylinder. In the second operating mode, when hydraulic fluid is supplied to the second flow path, hydraulic fluid flowing along the second flow path
3 telescopically moves the conductor tube assembly carrying the closure toward the body to a closed position, while concurrently supplying hydraulic fluid to the hydraulic cylinder.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIG. 1 is a side elevation view of a blow out preventer constructed in accordance with the teachings of the present invention.
FIG. 2 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the second fluid path when the conductor tube assembly is in the first operating mode with the closure lock in the locking position.
FIG. 3 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the first fluid path when the conductor tube assembly is in the first operating mode with the closure lock in the locking position.
FIG. 4 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the first fluid path when the conductor tube assembly is in the first operating mode with the closure lock in the locking position.
FIG. 5 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the second fluid path when the conductor tube assembly is in the first operating mode with the closure lock in the locking position.
FIG. 6 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the first fluid path when the conductor tube assembly is in the second operating mode with the closure lock in the release position.
FIG. 7 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the second fluid path when the conductor tube assembly is in the second operating mode with the closure lock in the release position.
FIG. 8 is a first detailed side elevation view, in section, of the blow out preventer illustrated in FIG. 1, showing flow restrictor operation to slow opening of closure.
FIG. 9 is a second detailed side elevation view, in section, of the blow out preventer illustrated in FIG. 1. showing flow restrictor operation to slow opening of closure.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIG. 1 is a side elevation view of a blow out preventer constructed in accordance with the teachings of the present invention.
FIG. 2 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the second fluid path when the conductor tube assembly is in the first operating mode with the closure lock in the locking position.
FIG. 3 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the first fluid path when the conductor tube assembly is in the first operating mode with the closure lock in the locking position.
FIG. 4 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the first fluid path when the conductor tube assembly is in the first operating mode with the closure lock in the locking position.
FIG. 5 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the second fluid path when the conductor tube assembly is in the first operating mode with the closure lock in the locking position.
FIG. 6 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the first fluid path when the conductor tube assembly is in the second operating mode with the closure lock in the release position.
FIG. 7 is a side elevation view, in section, of the blow out preventer illustrated in FIG. 1 with hydraulic fluid being supplied to the second fluid path when the conductor tube assembly is in the second operating mode with the closure lock in the release position.
FIG. 8 is a first detailed side elevation view, in section, of the blow out preventer illustrated in FIG. 1, showing flow restrictor operation to slow opening of closure.
FIG. 9 is a second detailed side elevation view, in section, of the blow out preventer illustrated in FIG. 1. showing flow restrictor operation to slow opening of closure.
4 FIG. 10 is a third detailed side elevation view, in section, of the blow out preventer illustrated in FIG. 1. showing flow restrictor operation to slow opening of closure.
DETAILED DESCRIP'I'ION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a blow out preventer generally identified by reference numeral 10, will now be described with reference to FIGS. 1 through 10.
Structure and Relationship of Parts:
Referring now to FIG. 1, there is shown blow out preventer 10, including a body 12 having an interior cavity 14 defining an axial flow passage 16 and at least one pair of radial ram receiving passages 18 intersecting axial flow passage 16. There is also a ram passage closure 20 for a remote end 22 of each ram receiving passage 18.
Referring to FIG.
2, each ram passage closure has an exterior face 24, an interior face 26, and a passage 28 that extends between exterior face 24 and interior face 26. A closure lock (shown as bolts 29) has a locking position where closure 20 is locked to body 12, and a release position (when bolts 29 removed) where closure 20 is free to move relative to body 12. Mounted between exterior face 24 and interior face 26 of each closure 20 is a hydraulic cylinder 32 that has an interior side wall 34 defining an interior cavity 36.
Referring to FIG. 2 through 5, a piston 38 is disposed within interior cavity 36 of hydraulic cylinder 32. Piston 38 divides interior cavity 36 of hydraulic cylinder 32 into two chambers depending upon the relative positioning piston 38 with interior cavity 36. When piston 38 is in the position illustrated in FIG. 4, a first chamber 40 is fonned. When piston 38 is in the position illustrated in FIG. 2, a second chamber 42 is fonned.
Referring to FIG.
4, piston 38 has a first face 44 facing first chamber 40. Referring to FIG. 2, piston 38 has a second face 46 facing second chamber 42. Referring to FIG. 3, a first hydraulic fluid port 48B is adapted to permit hydraulic fluid to enter first chamber 40 and exert a force against first face 44 of piston 38 in order to cause piston 38 to move in a first direction, as indicated by arrows 49. Referring to FIG. 5, a second hydraulic fluid port 50B is adapted to permit hydraulic fluid to enter second chamber 42 and exert a force against second face 46 of piston 38 in order to cause piston 38 to move in a second direction, as indicated by arrows 51. A
ram 52 that has a first end 54 and a second end 56 is disposed in passage 28 of closure 20.
First end 54 extends into one of the ram receiving passages 18 of body 12.
Piston 38 is secured to ram 52 toward second end 56, such that movement of piston 38 results in movement of ram 52. Referring to FIG. 1, a ram block 55 is attached to first end 54. Ram block 55 is adapted to pass through ram receiving passage 18 and is used to selectively block
DETAILED DESCRIP'I'ION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a blow out preventer generally identified by reference numeral 10, will now be described with reference to FIGS. 1 through 10.
Structure and Relationship of Parts:
Referring now to FIG. 1, there is shown blow out preventer 10, including a body 12 having an interior cavity 14 defining an axial flow passage 16 and at least one pair of radial ram receiving passages 18 intersecting axial flow passage 16. There is also a ram passage closure 20 for a remote end 22 of each ram receiving passage 18.
Referring to FIG.
2, each ram passage closure has an exterior face 24, an interior face 26, and a passage 28 that extends between exterior face 24 and interior face 26. A closure lock (shown as bolts 29) has a locking position where closure 20 is locked to body 12, and a release position (when bolts 29 removed) where closure 20 is free to move relative to body 12. Mounted between exterior face 24 and interior face 26 of each closure 20 is a hydraulic cylinder 32 that has an interior side wall 34 defining an interior cavity 36.
Referring to FIG. 2 through 5, a piston 38 is disposed within interior cavity 36 of hydraulic cylinder 32. Piston 38 divides interior cavity 36 of hydraulic cylinder 32 into two chambers depending upon the relative positioning piston 38 with interior cavity 36. When piston 38 is in the position illustrated in FIG. 4, a first chamber 40 is fonned. When piston 38 is in the position illustrated in FIG. 2, a second chamber 42 is fonned.
Referring to FIG.
4, piston 38 has a first face 44 facing first chamber 40. Referring to FIG. 2, piston 38 has a second face 46 facing second chamber 42. Referring to FIG. 3, a first hydraulic fluid port 48B is adapted to permit hydraulic fluid to enter first chamber 40 and exert a force against first face 44 of piston 38 in order to cause piston 38 to move in a first direction, as indicated by arrows 49. Referring to FIG. 5, a second hydraulic fluid port 50B is adapted to permit hydraulic fluid to enter second chamber 42 and exert a force against second face 46 of piston 38 in order to cause piston 38 to move in a second direction, as indicated by arrows 51. A
ram 52 that has a first end 54 and a second end 56 is disposed in passage 28 of closure 20.
First end 54 extends into one of the ram receiving passages 18 of body 12.
Piston 38 is secured to ram 52 toward second end 56, such that movement of piston 38 results in movement of ram 52. Referring to FIG. 1, a ram block 55 is attached to first end 54. Ram block 55 is adapted to pass through ram receiving passage 18 and is used to selectively block
5 axial flow passage 16.
Refen ing to FIG. 2 through 8, there is a conductor tube assembly 58 that has a dual walled first conductor tube 60 (consisting of an inner tube 61 and an outer sleeve 63) connected to body 12 and a dual walled second conductor tube 62 (consisting of an inner tube 69 and an outer sleeve 71) connected to closure 20. Referring to FIG. 3, conductor tube assembly 58 defines a first flow path 64 indicated by arrows 65. First flow path 64 is shown as commencing at 48A, to confirm the fact it is in fluid communication with first hydraulic fluid port 48B. Referring to FIG. 2, conductor tube assembly 58 also defines a second flow path 66 indicated by arrows 67. Second flow path 66 is shown as convnencing at 50A, to conflrm the fact it is in fluid communication with second hydraulic fluid port 50B.
Referring to FIG. 6 and 7, conductor tube assembly 58 is capable of telescopic extension. Upon relative telescopic extension of conductor tube assembly 58, closure 20 is carried away from body 12. Conductor tube assembly 58 has a first operating mode when the closure lock (bolts 29) is in the locking position and conductor tube assembly 58 is precluded from telescoping and a second operating mode when the closure lock is in the release position (by removing bolts 29) and conductor tube assembly 58 is &+ee to telescope.
The first operating mode will now be discussed. Referring to FIG. 4, when hydraulic fluid is supplied at 48A it flows along first flow path 64 as shown by arrows 65, passes into first hydraulic fluid port 48B and acts against first face 44 of piston 38 to cause piston 38 to move in the first direction 49. Referring to FIG. 3, as piston 38 moves in first direction 49 the area of second chamber 42 diminishes, with hydraulic fluid being concurrently exhausted from second chamber 42 through second fluid port 50B (best seen in FIG. 5) passing along second flow path 66 and out 50A to a hydraulic fluid source (not shown).
Referring to FIG.
2, when hydraulic fluid is supplied at 50A, it flows along second flow path 66 as shown by arrows 67, passes into second hydraulic fluid port 50B and acts against second face 46 of
Refen ing to FIG. 2 through 8, there is a conductor tube assembly 58 that has a dual walled first conductor tube 60 (consisting of an inner tube 61 and an outer sleeve 63) connected to body 12 and a dual walled second conductor tube 62 (consisting of an inner tube 69 and an outer sleeve 71) connected to closure 20. Referring to FIG. 3, conductor tube assembly 58 defines a first flow path 64 indicated by arrows 65. First flow path 64 is shown as commencing at 48A, to confirm the fact it is in fluid communication with first hydraulic fluid port 48B. Referring to FIG. 2, conductor tube assembly 58 also defines a second flow path 66 indicated by arrows 67. Second flow path 66 is shown as convnencing at 50A, to conflrm the fact it is in fluid communication with second hydraulic fluid port 50B.
Referring to FIG. 6 and 7, conductor tube assembly 58 is capable of telescopic extension. Upon relative telescopic extension of conductor tube assembly 58, closure 20 is carried away from body 12. Conductor tube assembly 58 has a first operating mode when the closure lock (bolts 29) is in the locking position and conductor tube assembly 58 is precluded from telescoping and a second operating mode when the closure lock is in the release position (by removing bolts 29) and conductor tube assembly 58 is &+ee to telescope.
The first operating mode will now be discussed. Referring to FIG. 4, when hydraulic fluid is supplied at 48A it flows along first flow path 64 as shown by arrows 65, passes into first hydraulic fluid port 48B and acts against first face 44 of piston 38 to cause piston 38 to move in the first direction 49. Referring to FIG. 3, as piston 38 moves in first direction 49 the area of second chamber 42 diminishes, with hydraulic fluid being concurrently exhausted from second chamber 42 through second fluid port 50B (best seen in FIG. 5) passing along second flow path 66 and out 50A to a hydraulic fluid source (not shown).
Referring to FIG.
2, when hydraulic fluid is supplied at 50A, it flows along second flow path 66 as shown by arrows 67, passes into second hydraulic fluid port 50B and acts against second face 46 of
6 piston 38 to cause piston 38 to move in the second direction 51. Referring to FIG. 5, as piston 38 moves in second direction 51 the area of first chamber 40 diminishes, with hydraulic fluid being concurrently exhausted from first chamber 40 through first fluid port 48B passing along first flow path 64 and out 48A to a hydraulic fluid source (not shown).
The second operating mode will now be discussed. Referring to FIG. 6 and 7, in this second operating mode, the closure lock is released (by removing bolts 29) and conductor tube assembly 58 is free to telescope. Referring to FIG. 6, when hydraulic fluid is supplied at 48A to first flow path 64, the hydraulic fluid telescopically moves conductor tube assembly 58 and carries closure 20 away from body 12 to an open position, as shown by arrows 65.
Once conductor tube assembly 58 has been extended, the continued supply of hydraulic fluid will pass to hydraulic cylinder 32 at first hydraulic fluid port 48B to cause piston 38 to move in first direction 49, as previously described with reference to FIG. 3.
Referring to FIG. 7, when hydraulic fluid is supplied at 50A to second flow path 66, as shown by arrows 67, the hydraulic fluid first moves piston 38 in the second direction 51, as described with reference to FIG. 5. The continued supply of hydraulic fluid moves conductor tube assembly 58 carrying closure 20 toward body 12 back to a closed position.
Referring to FIG. 2 through 5, as depicted, first conductor tube 60 and second conductor tube 62 are each dual walled tubes having inner passages 68 and 70, and outer annular passages 72 and 74, respectively. Referring to FIG. 4, first flow path 64 has hydraulic fluids entering at 48A passing along inner passage 68 of first conductor tube 60 and then along outer annular passage 74 of second conductor tube 62 to first hydraulic port 48B.
Referring to FIG. 2, second flow path 66 has hydraulic fluids entering at 50A
passing along outer annular passage 72 of first conductor tube 60 and then along inner passage 70 of second conductor tube 62 to second hydraulic port 50B.
Referring to FIG. 8 through 10, a hydraulic flow restrictor 75 is provided along second flow path 66 that is adapted to restrict the speed at which conductor tube assembly 58 telescopically extends to open closure 20. Referring to FIG. 8, conductor tube assembly 58 is slowed by flow restrictor 75, as conductor tube assembly 58 approaches full extension. Port 76 is in fluid communication with second chamber 42 until it enters restriction 75, which
The second operating mode will now be discussed. Referring to FIG. 6 and 7, in this second operating mode, the closure lock is released (by removing bolts 29) and conductor tube assembly 58 is free to telescope. Referring to FIG. 6, when hydraulic fluid is supplied at 48A to first flow path 64, the hydraulic fluid telescopically moves conductor tube assembly 58 and carries closure 20 away from body 12 to an open position, as shown by arrows 65.
Once conductor tube assembly 58 has been extended, the continued supply of hydraulic fluid will pass to hydraulic cylinder 32 at first hydraulic fluid port 48B to cause piston 38 to move in first direction 49, as previously described with reference to FIG. 3.
Referring to FIG. 7, when hydraulic fluid is supplied at 50A to second flow path 66, as shown by arrows 67, the hydraulic fluid first moves piston 38 in the second direction 51, as described with reference to FIG. 5. The continued supply of hydraulic fluid moves conductor tube assembly 58 carrying closure 20 toward body 12 back to a closed position.
Referring to FIG. 2 through 5, as depicted, first conductor tube 60 and second conductor tube 62 are each dual walled tubes having inner passages 68 and 70, and outer annular passages 72 and 74, respectively. Referring to FIG. 4, first flow path 64 has hydraulic fluids entering at 48A passing along inner passage 68 of first conductor tube 60 and then along outer annular passage 74 of second conductor tube 62 to first hydraulic port 48B.
Referring to FIG. 2, second flow path 66 has hydraulic fluids entering at 50A
passing along outer annular passage 72 of first conductor tube 60 and then along inner passage 70 of second conductor tube 62 to second hydraulic port 50B.
Referring to FIG. 8 through 10, a hydraulic flow restrictor 75 is provided along second flow path 66 that is adapted to restrict the speed at which conductor tube assembly 58 telescopically extends to open closure 20. Referring to FIG. 8, conductor tube assembly 58 is slowed by flow restrictor 75, as conductor tube assembly 58 approaches full extension. Port 76 is in fluid communication with second chamber 42 until it enters restriction 75, which
7 abruptly restricts fluid flow providing a braking action. Referring to FIG. 9, as extension continues due to forward momentum, port 76 enters flow restrictor cavity 78 and a limited flow is restored as conductor tube assembly 58 comes to rest. FIG. 10 shows the final resting position of conductor tube assembly 58 and flow restrictor 74, with conductor tube assembly 58 fully extended.
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
In this patent document, the word "comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (2)
1. A blow out preventer, comprising:
a body having an interior cavity defining an axial flow passage and at least one pair of radial ram receiving passages intersecting the axial flow passage;
a ram passage closure for a remote end of each of the ram receiving passages, each closure having an exterior face, an interior face, and a passage that extends between the exterior face and the interior face;
a closure lock having a locking position and a release position, in the locking position the closure is locked to the body and in the release position the closure is free to move relative to the body;
a hydraulic cylinder mounted on the exterior face of each closure, the hydraulic cylinder having an interior side wall defining an interior cavity;
a piston disposed within the interior cavity of the hydraulic cylinder and dividing the hydraulic cylinder into a first chamber and a second chamber, the piston having a first face facing the first chamber and a second face facing the second chamber;
a first hydraulic fluid port adapted to permit hydraulic fluid to enter the first chamber and exert a force against the first face of the piston in order to cause the piston to move in a first direction;
a second hydraulic fluid port adapted to permit hydraulic fluid to enter the second chamber and exert a force against the second face of the piston in order to cause the piston to move in a second direction;
a ram disposed in the passage of the closure, the ram having a first end and a second end, the first end extending into one of the ram receiving passages of the body, the second end being secured to the piston, such that movement of the piston results in movement of the ram;
a telescopic conductor tube assembly having a dual walled first conductor tube which telescopically interacts with a dual walled second conductor tube, the first conductor tube being connected to the body and having an inner tube defining an inner passage and an outer sleeve defining an outer annular passage and the second conductor tube being connected to the closure and having an inner tube defining an inner passage and an outer sleeve defining an outer annular passage, such that upon relative telescopic extension of the conductor tube assembly the closure is carried by the second conductor tube away from the body;
the conductor tube assembly defining a first flow path along the inner passage of the first conductor tube and then along the outer annular passage of the second conductor tube to the first hydraulic fluid port and a second flow path along the outer annular passage of the first conductor tube and then along the inner passage of the second conductor tube to the second hydraulic fluid port;
the conductor tube assembly having a first operating mode when the closure lock is in the locking position and a second operating mode when the closure lock is in the release position, in the first operating mode when hydraulic fluid is supplied to the first flow path it passes into the first hydraulic fluid port acting against the first face of the piston to cause the piston to move in the first direction with hydraulic fluid being concurrently exhausted from the second chamber through the second fluid port passing along the second flow path, in the first operating mode when hydraulic fluid is supplied to the second flow path it passes into the second hydraulic fluid port acting against the second face of the piston to cause the piston to move in the second direction with hydraulic fluid being concurrently exhausted from the first chamber through the first fluid port passing along the first flow path, in the second operating mode when hydraulic fluid is supplied to the first flow path the hydraulic fluid telescopically moves the conductor tube assembly carrying the closure away from the body to an open position while concurrently supplying hydraulic fluid to the hydraulic cylinder to cause the piston to move in the first direction, in the second operating mode when hydraulic fluid is supplied to the second flow path the hydraulic fluid is supplied to the hydraulic cylinder to cause the piston to move in the second direction while concurrently telescopically moving the conductor tube assembly carrying the closure toward the body to a closed position.
a body having an interior cavity defining an axial flow passage and at least one pair of radial ram receiving passages intersecting the axial flow passage;
a ram passage closure for a remote end of each of the ram receiving passages, each closure having an exterior face, an interior face, and a passage that extends between the exterior face and the interior face;
a closure lock having a locking position and a release position, in the locking position the closure is locked to the body and in the release position the closure is free to move relative to the body;
a hydraulic cylinder mounted on the exterior face of each closure, the hydraulic cylinder having an interior side wall defining an interior cavity;
a piston disposed within the interior cavity of the hydraulic cylinder and dividing the hydraulic cylinder into a first chamber and a second chamber, the piston having a first face facing the first chamber and a second face facing the second chamber;
a first hydraulic fluid port adapted to permit hydraulic fluid to enter the first chamber and exert a force against the first face of the piston in order to cause the piston to move in a first direction;
a second hydraulic fluid port adapted to permit hydraulic fluid to enter the second chamber and exert a force against the second face of the piston in order to cause the piston to move in a second direction;
a ram disposed in the passage of the closure, the ram having a first end and a second end, the first end extending into one of the ram receiving passages of the body, the second end being secured to the piston, such that movement of the piston results in movement of the ram;
a telescopic conductor tube assembly having a dual walled first conductor tube which telescopically interacts with a dual walled second conductor tube, the first conductor tube being connected to the body and having an inner tube defining an inner passage and an outer sleeve defining an outer annular passage and the second conductor tube being connected to the closure and having an inner tube defining an inner passage and an outer sleeve defining an outer annular passage, such that upon relative telescopic extension of the conductor tube assembly the closure is carried by the second conductor tube away from the body;
the conductor tube assembly defining a first flow path along the inner passage of the first conductor tube and then along the outer annular passage of the second conductor tube to the first hydraulic fluid port and a second flow path along the outer annular passage of the first conductor tube and then along the inner passage of the second conductor tube to the second hydraulic fluid port;
the conductor tube assembly having a first operating mode when the closure lock is in the locking position and a second operating mode when the closure lock is in the release position, in the first operating mode when hydraulic fluid is supplied to the first flow path it passes into the first hydraulic fluid port acting against the first face of the piston to cause the piston to move in the first direction with hydraulic fluid being concurrently exhausted from the second chamber through the second fluid port passing along the second flow path, in the first operating mode when hydraulic fluid is supplied to the second flow path it passes into the second hydraulic fluid port acting against the second face of the piston to cause the piston to move in the second direction with hydraulic fluid being concurrently exhausted from the first chamber through the first fluid port passing along the first flow path, in the second operating mode when hydraulic fluid is supplied to the first flow path the hydraulic fluid telescopically moves the conductor tube assembly carrying the closure away from the body to an open position while concurrently supplying hydraulic fluid to the hydraulic cylinder to cause the piston to move in the first direction, in the second operating mode when hydraulic fluid is supplied to the second flow path the hydraulic fluid is supplied to the hydraulic cylinder to cause the piston to move in the second direction while concurrently telescopically moving the conductor tube assembly carrying the closure toward the body to a closed position.
2. The blow out preventer as defined in Claim 1, wherein a hydraulic flow restrictor is provided along the second flow path, the flow restrictor being adapted to restrict the speed at which the conductor tube assembly telescopically extends to open the closure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002506828A CA2506828C (en) | 2005-04-29 | 2005-04-29 | Blow out preventer with telescopic conductor tube assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002506828A CA2506828C (en) | 2005-04-29 | 2005-04-29 | Blow out preventer with telescopic conductor tube assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2506828A1 CA2506828A1 (en) | 2006-10-29 |
| CA2506828C true CA2506828C (en) | 2009-07-21 |
Family
ID=37310215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002506828A Active CA2506828C (en) | 2005-04-29 | 2005-04-29 | Blow out preventer with telescopic conductor tube assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2506828C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9004089B2 (en) | 2009-08-10 | 2015-04-14 | Dean Foote | Blowout preventer with lock |
| US9010718B2 (en) | 2009-08-10 | 2015-04-21 | Dean Foote | Seal assembly for a pressure plate in a blowout preventer |
| US9121246B2 (en) | 2009-08-10 | 2015-09-01 | Dean Foote | Blowout preventer having wear, seal and guide plate inserts |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8132777B2 (en) * | 2008-01-23 | 2012-03-13 | Alberta Petroleum Industries Ltd. | Blowout preventer having modified hydraulic operator |
| US8403290B2 (en) * | 2008-06-09 | 2013-03-26 | Alberta Petroleum Industries Ltd. | Wiper seal assembly |
| US8567427B1 (en) | 2010-12-18 | 2013-10-29 | Philip John Milanovich | Blowout preventers using plates propelled by explosive charges |
| US8316872B1 (en) | 2010-12-18 | 2012-11-27 | Philip John Milanovich | Blowout preventer using a plate propelled by an explosive charge |
| US8794333B1 (en) | 2013-07-02 | 2014-08-05 | Milanovich Investments, L.L.C. | Combination blowout preventer and recovery device |
| US8794308B1 (en) | 2013-07-21 | 2014-08-05 | Milanovich Investments, L.L.C. | Blowout preventer and flow regulator |
| US9777547B1 (en) | 2015-06-29 | 2017-10-03 | Milanovich Investments, L.L.C. | Blowout preventers made from plastic enhanced with graphene, phosphorescent or other material, with sleeves that fit inside well pipes, and making use of well pressure |
-
2005
- 2005-04-29 CA CA002506828A patent/CA2506828C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9004089B2 (en) | 2009-08-10 | 2015-04-14 | Dean Foote | Blowout preventer with lock |
| US9010718B2 (en) | 2009-08-10 | 2015-04-21 | Dean Foote | Seal assembly for a pressure plate in a blowout preventer |
| US9121246B2 (en) | 2009-08-10 | 2015-09-01 | Dean Foote | Blowout preventer having wear, seal and guide plate inserts |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2506828A1 (en) | 2006-10-29 |
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