초록 ▼

The consequences of any failure of a blow out preventer assembly to operate correctly in an emergency can be far reaching. Thus, there is provided an apparatus for registering parameters in the bore of a member which is, in use, connected to a pressurised housing, the apparatus comprising: an electr

The consequences of any failure of a blow out preventer assembly to operate correctly in an emergency can be far reaching. Thus, there is provided an apparatus for registering parameters in the bore of a member which is, in use, connected to a pressurised housing, the apparatus comprising: an electro-control package for attachment, in use, to the member; a test assembly placed, in use, in the member; the electro-control package and the test assembly having means for sending signals to and receiving signals from one another.

대표청구항 ▼

The invention claimed is: 1. An apparatus for testing the bore closure elements in a blow out preventer (BOP) assembly connected to a wellhead, the apparatus comprising: a shearable test tool assembly disposable within the bore of the BOP assembly; an electro-control package attached to the outside

The invention claimed is: 1. An apparatus for testing the bore closure elements in a blow out preventer (BOP) assembly connected to a wellhead, the apparatus comprising: a shearable test tool assembly disposable within the bore of the BOP assembly; an electro-control package attached to the outside of the BOP assembly and in fluid communication with the bore of the BOP assembly; and a means for sending and receiving signals between said test tool assembly and said electro-control package. 2. An apparatus according to claim 1, wherein said test tool assembly is locked and sealed into the wellhead by means of a rotation mechanism. 3. An apparatus according to claim 1, wherein said test tool assembly is locked and sealed in the wellhead at a predetermined elevation and can withstand both downward and upward force. 4. An apparatus according to claim 1, further comprising a bore through said test tool assembly and a one way flow mechanism within said test tool assembly bore, allowing free upward flow of fluid and preventing any downward communication of pressure or fluid flow. 5. An apparatus according to claim 4, further comprising a dart which can be passed down through said test tool assembly bore to engage a test assembly test plug such that hydraulic pressure from above opens a two way fluid communication path from above to below the test plug. 6. An apparatus according to claim 1, further comprising a mandrel connected to the test tool assembly; said mandrel having an upper and lower part, the upper and lower parts being joined by a mandrel coupling which is released by rotation. 7. An apparatus according to claim 6, wherein the mandrel coupling can be disconnected to permit a set of shear blind rams to be closed without damaging the mandrel. 8. An apparatus according to claim 1, wherein said electro-control package has independent sensing means for monitoring the parameters in the BOP bore above the wellhead. 9. An apparatus according to claim 8, wherein the parameters include one of the following: pressure, temperature, velocity, density and phase detection. 10. An apparatus according to claim 9, wherein the phase detection can be one of the following: drilling mud, cement, gas, oil, water and completion fluid. 11. An apparatus for testing the bore closure elements in a blow out preventer (BOP) assembly connected to a wellhead, the apparatus comprising: a shearable test tool assembly disposable within the bore of the BOP assembly; an electro-control package attached to the outside of the BOP assembly and in fluid communication with the bore of the BOP assembly; and a means for sending and receiving signals between said test tool assembly and said electro-control package, wherein said test tool assembly is provided with one or more nose adaptors for interfacing with different components placed in the wellhead for testing. 12. An apparatus for testing the bore closure elements in a blow out preventer (BOP) assembly connected to a wellhead, the apparatus comprising: a shearable test tool assembly disposable within the bore of the BOP assembly; an electro-control package attached to the outside of the BOP assembly and in fluid communication with the bore of the BOP assembly; and a means for sending and receiving signals between said test tool assembly and said electro-control package; and a test mandrel adapted to engage one of the bore closure elements of the BOP. 13. An apparatus for testing the bore closure elements in a blow out preventer (BOP) assembly connected to a wellhead, the apparatus comprising: a shearable test tool assembly disposable within the bore of the BOP assembly; an electro-control package attached to the outside of the BOP assembly and in fluid communication with the bore of the BOP assembly; and a means for sending and receiving signals between said test tool assembly and said electro-control package; and a hydraulically operated anti-rotational release coupling mechanism. 14. An apparatus for testing the bore closure elements in a blow out preventer (BOP) assembly connected to a wellhead, the apparatus comprising: a shearable test tool assembly disposable within the BOP assembly; an electro-control package adapted for attachment to the BOP assembly; a means for sending and receiving signals between said test tool assembly and said electro-control package; and a hydraulically operated anti-rotational release coupling mechanism, wherein the hydraulically operated anti-rotational mechanism overrides pressuring up against a downward hydraulic barrier mechanism in the test assembly allowing rotation to release the coupling release coupling mechanism is actuated by a downward hydraulic barrier mechanism in the test assembly, allowing rotation to release the coupling. 15. An apparatus according to claim 14, wherein the coupling has a self sealing cam make up/release mechanism. 16. An apparatus for testing the bore closure elements in a blow out preventer (BOP) assembly connected to a wellhead, the apparatus comprising: a shearable test tool assembly disposable within the BOP assembly; an electro-control package adapted for attachment to the BOP assembly; a means for sending and receiving signals between said test tool assembly and said electro-control package; a bore through said test tool assembly; a one way flow mechanism within said test tool assembly bore, allowing free upward flow of fluid and preventing any downward communication of pressure or fluid flow; and a one way downflow unit to allow circulation down the bore but which contains bore pressure from below. 17. An apparatus according to claim 16, wherein the one way down flow unit forms a prime pressure barrier in the wellhead. 18. An apparatus according to claim 16, wherein the one way down flow unit allows circulation up an annulus. 19. An apparatus for testing the bore closure elements in a blow out preventer (BOP) assembly connected to a wellhead, the apparatus comprising: a shearable test tool assembly disposable within the BOP assembly; an electro-control package adapted for attachment to the BOP assembly; a means for sending and receiving signals between said test tool assembly and said electro-control package; a hydraulically operated anti-rotational release coupling mechanism; and a differential pressure downward circulation means to permit disconnection of the anti rotational release coupling mechanism. 20. An apparatus for testing a BOP connected to a wellhead and having a plurality of wellbore closure members including at least one blind ram, the apparatus comprising: a wellhead test plug adapted to sealingly connect to the wellhead; a lower mandrel having a lower end attached to said wellhead test plug and an upper end disposed below the blind ram; an upper mandrel having a lower end removably attached to said lower mandrel and an upper end connected to a drillstring extending up the wellbore, wherein said upper mandrel can be disconnected from said lower mandrel while said wellhead test plug is connected to the wellhead; a plurality of sensors disposed in said wellhead test plug; and a signal relay device adapted to transmit data from said plurality of sensors to a control package coupled to the BOP, wherein the control package is disposed outside of the wellbore. 21. The apparatus of claim 20 further comprising a mandrel coupling removably attaching said lower mandrel to said upper mandrel, wherein said mandrel coupling is positioned adjacent to and below the blind ram. 22. The apparatus of claim 20 further comprising a nose adapter connected to said wellhead test plug, wherein said nose adapter is operable to engage a casing hanger supported by the wellhead. 23. The apparatus of claim 20 further comprising a control package connected to the BOP and adapted to provide hydraulic fluid to the wellbore. 24. The apparatus of claim 20, further comprising a bore through said wellhead test plug and said mandrels; and a one way flow mechanism disposed within said bore and adapted to allow free upward flow of fluid and prevent downward communication of pressure or fluid flow. 25. The apparatus of claim 20 further comprising a selectively openable bypass disposed in said wellhead test plug. 26. The apparatus according to claim 25, further comprising a dart adapted to engage said wellhead test plug so as to open the bypass and allow two-way fluid communication from above to below the wellhead test plug. 27. An apparatus for testing a BOP connected to a wellhead and having a plurality of wellbore closure members including at least one blind ram, the apparatus comprising: a wellhead test plug adapted to sealingly connect to the wellhead; a lower mandrel having a lower end attached to said wellhead test plug and an upper end disposed below the blind ram; an upper mandrel having a lower end removably attached to said lower mandrel and an upper end connected to a drillstring extending up the wellbore; a plurality of sensors disposed in said wellhead test plug; a signal relay device adapted to transmit data from said plurality of sensors to a control package coupled to the BOP; and a one-way downflow unit to allow circulation down the wellbore through the wellhead test plug but which contains bore pressure from below. 28. The apparatus according to claim 27, wherein the one-way downflow unit forms a prime pressure barrier in the wellhead. 29. The apparatus according to claim 27, wherein the one-way downflow unit allows circulation up an annulus inside the wellbore.