IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0050185
(2016-02-22)
|
등록번호 |
US-9771766
(2017-09-26)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
34 |
초록
▼
Inside blowout preventer release tool having an upper section and a tubular lower section. The upper section includes a pair of longitudinal members defining a central open region, and a formed lifting feature accepting a manipulator. The lifting feature is positioned such that when the release tool
Inside blowout preventer release tool having an upper section and a tubular lower section. The upper section includes a pair of longitudinal members defining a central open region, and a formed lifting feature accepting a manipulator. The lifting feature is positioned such that when the release tool body and an inside blowout preventer connected thereto are lifted by the rig hoist they are easily moved over, aligned with, and connected with a working drillpipe while minimizing possibility of slipping off cables or chains. The lower section includes a threaded end mating with a mating end of an inside blowout preventer, a central longitudinal bore to accept a length-adjustable release rod, and an upper end formed to mate with the upper section. Slots in each longitudinal member may define one or more manipulating handles for a rig worker, machine, or tool, or a pair of generally horizontal hand holds are provided.
대표청구항
▼
1. A modular release tool for use with an inside blowout preventer, the modular release tool comprising: a one-piece, formed, planar metallic upper section having a longitudinal axis, the upper section comprising a pair of longitudinal members defining a central open region, each longitudinal member
1. A modular release tool for use with an inside blowout preventer, the modular release tool comprising: a one-piece, formed, planar metallic upper section having a longitudinal axis, the upper section comprising a pair of longitudinal members defining a central open region, each longitudinal member having a lower end, the longitudinal members joined by a top manipulating end having one or more lifting features formed therein configured to accept one or more manipulator cables or chains, the one or more formed lifting features positioned such that when the release tool body and the inside blowout preventer connected thereto are lifted by the manipulator cables or chains they are they are easily moved over, aligned with, and connected with a working drillpipe, and configured to prevent the manipulators slipping off;a one-piece, formed, tubular metallic lower section removably attached to the upper section having the same longitudinal axis as the upper section, the lower section comprising a threaded externally tapered pin end configured to threadedly mate with a box end of an inside blowout preventer; a central longitudinal bore having diameter sufficient to slidingly accept a release rod;an upper end formed to accept the lower ends of the longitudinal members of the upper section and retaining members therefore;the upper end further formed to comprise a central axial extension comprising one or more fluid outlets fluidly connected with the central longitudinal bore, the central axial extension of length sufficient to accommodate an internally threaded bore substantially perpendicular to and intersecting the central longitudinal bore, and accept a mating threaded release rod lock screw therein;one or more formed slots in each longitudinal member of size sufficient to define one or more manipulating handles for a rig worker or mechanical manipulator to grasp the upper section and rotate the release tool and thread the pin end of the lower section into the box end of the inside blowout preventer, and thread the inside blowout preventer into a drillpipe; anda length-adjustable release rod slidingly positioned in the lower section central bore and dimensioned so as to be accessible by a rig worker or remotely operated device through the central region of the upper section, the central region having a width substantially larger than diameter of the release rod. 2. The modular release tool according to claim 1 wherein the length-adjustable release rod comprises an upper and a lower rod portion telescopically engaged and held in length position by one or more fasteners. 3. The modular release tool according to claim 1 further comprising a rod lock housing including one or more view slots allowing viewing of position of the release rod in the housing. 4. The modular release tool according to claim 1 wherein the one or more lifting features is a single centered lifting eye formed through the top manipulating end of the upper section. 5. The modular release tool according to claim 1 wherein the upper end of the lower section is formed to include a pair of vertical receptacles for the lower ends of the upper section, and wherein the retaining members comprise one or more screws threaded through corresponding threaded bores through the receptacles and lower ends. 6. The modular release tool according to claim 1 wherein the central open region is sufficiently large to allow a rig worker or mechanical manipulator to engage a release rod and move the release rod downward, opening a valve in the inside blowout preventer. 7. The modular release tool according to claim 1, further comprising a combination of metallurgy and structural reinforcement to prevent failure of the release tool upon exposure to inner pressure up to 10,000 psia. 8. A combination modular release tool and inside blowout preventer for threadedly attaching to a drillpipe, the drillpipe having a threaded end for engaging the inside blowout preventer, the combination comprising an inside blowout preventer having a lower end threadably engageable with the drillpipe threaded end and an upper box end threadably engaged with the modular release tool of claim 1. 9. The combination of claim 8 wherein the one or more lifting features is a single centered lifting eye formed through the top manipulating end of the upper section. 10. The combination of claim 8 wherein the upper end of the lower section is formed to include a pair of vertical receptacles for the lower ends of the upper section, and wherein the retaining members comprise one or more screws threaded through corresponding threaded bores through the receptacles and lower ends. 11. The combination of claim 8 further comprising one or more subsea hot stab ports for subsea ROV intervention and/or maintenance of the inside blowout preventer. 12. The combination of claim 8 comprising one or more ports allowing pressure and/or temperature monitoring inside the inside blowout preventer. 13. The combination of claim 8 further comprising a combination of metallurgy and structural reinforcement to prevent failure of the inside blowout preventer and/or release tool upon exposure to inner pressure up to 10,000 psia. 14. The combination of claim 8 further comprising one or more subsea umbilicals fluidly connected to locations on the inside BOP selected from the group consisting of a kill line, a choke line, and both kill and choke lines. 15. A modular release tool for use with an inside blowout preventer, the modular release tool comprising: a one-piece, formed, planar metallic upper section having a longitudinal axis, the upper section comprising a pair of longitudinal members defining a central open region, each longitudinal member having a lower end, the longitudinal members joined by a top manipulating end having one or more lifting features formed therein configured to accept one or more manipulators, the one or more formed lifting features positioned such that when the release tool body and an inside blowout preventer connected thereto are lifted by the one or more manipulator, they are easily moved over, aligned with, and connected with a working drillpipe, and configured to prevent the manipulators slipping off, and two or more formed slots in each longitudinal member of size sufficient to define one or more generally horizontal manipulating handles for a rig worker or mechanical manipulator to grasp the upper section and rotate the release tool and thread the pin end of the lower section into the box end of the inside blowout preventer;a one-piece, formed, tubular metallic lower section removably attached to the upper section having the same longitudinal axis as the upper section, the lower section comprising a threaded end configured to threadedly mate with an end of an inside blowout preventer; a central longitudinal bore of diameter sufficient to slidingly accept a release rod;an upper end formed to accept the lower ends of the longitudinal members of the upper section and retaining members therefore;the upper end further formed to comprise a central axial extension comprising one or more fluid outlets fluidly connected with the central longitudinal bore, the central axial extension of length sufficient to accommodate an internally threaded bore substantially perpendicular to and intersecting the central longitudinal bore, and accept a mating threaded release rod lock screw therein; anda length-adjustable release rod slidingly positioned in the lower section central bore and dimensioned so as to be accessible by a rig worker or remotely operated device through the central region of the upper section, the central region having a width substantially larger than diameter of the release rod. 16. The modular release tool according to claim 15 wherein the length-adjustable release rod comprises an upper and a lower rod portion telescopically engaged and held in length position by one or more fasteners. 17. The modular release tool according to claim 15 further comprising a rod lock housing including one or more view slots allowing viewing of position of the release rod in the housing. 18. The modular release tool body of claim 15 further comprising hand guards removably attached to each longitudinal member, the hand guards positioned and sized sufficiently to provide protection to a worker's hands or mechanical manipulator when grasping the generally horizontal manipulating handles. 19. The modular release tool body of claim 15 wherein the hand guards are half members of split aluminum pipe attached to the longitudinal members using bolts. 20. A method of easily and safely attaching a combination inside blowout preventer (IBOP) and release tool having a lower threaded end to a threaded end of a working drillpipe, the method comprising the steps of: (a) optionally, determining whether a lower section of the release tool will make up to the IBOP, which depends on whether a lower end of the IBOP will make up to the working drillpipe, and if not, changing the lower section of the release tool to match size (outside diameter) of another IBOP;(b) measuring the length of an adjustable length release rod required by inspecting the IBOP (actual IBOP or drawing of same), setting the length of the adjustable length release rod accordingly, and tightening a release rod lock screw;(c) assembling the combination of IBOP and release tool so that a lower end of the locked-in-place, adjustable length release rod presses down on and moves into a position holding a valve of the IBOP open;(d) lifting the combination, with IBOP valve locked open, to a position over the working drillpipe threaded end using one or more formed lifting features on the release tool, the lifting feature positioned such that when the combination is lifted by ropes, cables or chains, the combination is easily moved over, aligned with, and connected with the working drillpipe, and configured to prevent the ropes, cables, or chains slipping off;(e) threading the combination onto the working drillpipe and continue turning the combination using formed handles so that threads of the lower end of the IBOP thread into the threads of the working drillpipe; and(f) optionally, if the IBOP is of the type having a check valve therein, fixing the IBOP in position on the working drillpipe so that no further escape of fluid or liquids will occur, and if the IBOP is the type having a dart valve therein, closing the dart valve by turning the release rod lock screw, allowing an IBOP spring to bias an IBOP dart upward and seal, terminating flow.
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