An invention directed to an off-shore petroleum oil well, comprising an exemplary prototype device for ‘Subsea Level Diversion of a Gas Entrainment’ working in conjunction with a device of ‘Sea Level Gas Separator of Oil Well Effluent’ (SLGOE) unit, wherein said devising of the subsea diversion of a gas entrainment precluding the gas entrainment entering a rig upon failure of a Blow out preventer (BOP), the encompassing means and methods of said oceanic diversion as set forth below—
- (a) a bottom string of a ‘marine riser’ and a bottom string of a ‘drilling conductor’, close to a well head, are set forth to incorporating large horizontally dispositioned ‘Gas Entrainment Diversion Tubing’ (GDT) originating from the riser pipe and emerging from the conductor string, said GDT devised to be two or more in circumferential equidistance, wherein each GDT forks into a down turned terminal (DTT) opening into the ocean waters, and an up going Effluent Diversion Tubing (EDT) to be reaching an Emergency operational SLGOE unit’ (the EOS unit), said EDT being normally closed by a sturdy clamp and opened at the conclusion of the GDT functioning,
- (b) said down-turned ocean terminal (DTT) comprising one way valves divert a gas entrainment into ocean waters from the riser pipe, whereas closure of an air-tight high security rig site closure sealing the riser-conductor from the rig,
- (c) the down-turned terminal (DTT) precluding the pressure of a true vertical height (TVH) of the ocean waters exerting upon the one way valves, as also the ocean terminal not subject to full effects of the ‘hydrostatic pressure’ of an open body of ocean water, as in accordance with Pascal's law,
- (d) (i) the GDT being additionally set forth about the midway of the riser-conductor, as also about the top strings, comprising at least 6 in number to greatly subdue the gas entrainment reaching the rig site, whereas lengthy risers can be elected to comprising further additions of GDT,
- (e) though a giant gas entrainment from the GDT emerging to the surface waters is neither ‘pressured’ (as per the Pascal's law) nor ‘explosive’, as a cautionary measure, it is precluded from rising to a surface ‘air-gap’ as follows:
- (i) as drilling a down hole is reaching a completion and amenable for a ‘kick’ from an oil containment, a threaded stem of a large metal trumpet (the ‘well site’ trumpet) is devised to articulate with each of the down turned terminal (DTT), the trumpet's flat bottom comprising 4-5 rubber tubing traversing radially to diverse destinations 50-70 meters afar;
- (ii) each rubber tubing in turn terminating as a wide metal trumpet (‘off-site’ trumpet) having a flat down-facing bottom steadied to the ocean floor, few short diverging metal tubing from the bottom emitting the divided gas entrainment into the ocean waters;
- (iii) said devising ‘distancing’ the emerging gas entrainment from the ‘air-gap’ and the rig confines,
- (f) the GDT functioning in ‘oceanic diversion’ of the gas entrainment in instances as set forth below:
- (i) wherein drilling a down-hole is reaching a completion and subject to a ‘kick’ from an oil containment;
- (ii) upon a well blow-out following a down-hole penetration,
- (g) upon cessation of the gas entrainment, the ‘well site’ trumpets are disarticulated and the DTT capped by robotic arms, precluding oceanic contamination with an ‘oil gusher’ that may follow, the encompassing means and methods as set forth below:
- (i) at least one of the tubing terminating into an ‘off-site’ trumpet is subject to carrying along with it a ‘water sampling tube’ (normally closed by a sturdy closure about the rig terminal), wherefrom the ocean waters are periodically sampled;
- (ii) upon the water sampling showing the presence of oil effluent (as also the emerging gas bubbles about the ‘off site’ trumpet tubing seeming none by recordation of a night-vision vodeo set forth about the ocean floor), the ‘well site’ trumpets are disarticulated and all the DTT capped, the cap about the DTT being affixed by a lengthy chain about the top of the cap head;
- (iii) soon after, the EDT is unclamped for an oil flow into the EOS unit, however, the incidental diverting of an ‘oil gusher’ into the oceanic waters minimizing the pressure of the gusher, as also the part of the gusher possibly reaching the rig being minimized,
- (h) an alternate means of oil collection from an incessant oil gusher upon cessation of the gas entrainment comprises disconnecting the off site trumpets and connecting the 24-30 of the emerging rubber tubing to oil receptacles,
- (i) (1) a down-hole, a well head and midway oil-gas sensing alarms about the well, set forth before down-hole penetration serving as a warning to the crew, for the closure of said air-tight high security rig site closure, sealing the riser-conductor from the rig;
- (2) the GDT optionally set forth with sturdy ‘GDT closures’ within the riser pipe, the closures opening upon ringing of any of the well site alarms,
- (j) few of the riser strings and few of the conductor strings are manufactured incorporating the GDT, whereas a conjoining of the GDT of the riser and the conductor by a sturdy ‘sliding screw’ is done within the conductor space upon the riser deployment, said conjoining tubing comprising a segment of rubber tubing allowing possible imprecision, and
- (k) the SLGOE unit comprising two discrete functional models such as—(i) Emergency Operational SLGOE unit’ (EOS unit) and (ii) Multi Operational SLGOE unit (MOS unit).