Methods for drilling and producing a surface wellbore
A method for drilling and producing a surface wellbore. The method can include drilling a conductor pipe borehole; installing a conductor pipe within the conductor pipe borehole; installing a drilling flange onto the conductor pipe; and assembling a wellhead stack on the drilling flange. The wellhead stack can include two or more blow out preventers, a kill line hub secured to and in fluid communications with a first spool located below a first blowout preventer, a choke line hub secured to and in fluid communications with a second spool located between a second blowout preventer and the first blow out preventer, a choke line, and a kill line, wherein both the kill line and choke line each have a quick connect collet connector. The kill line collet connector can be landed on the kill line and the choke line collet connector on the choke line hub. Each collet connector can be actuated to bring a throughbore in the choke line hub and the kill line hub into sealing engagement with each collet connector throughbore.
1. A method for drilling and producing a surface wellbore, comprising drilling a conductor pipe borehole;
installing a conductor pipe within the conductor pipe borehole;
installing a drilling flange onto the conductor pipe;
assembling a wellhead stack on the drilling flange, wherein the wellhead stack comprises:
two or more blow out preventers,
a kill line hub secured to and in fluid communications with a first spool located below a first blowout preventer,
a choke line hub secured to and in fluid communications with a second spool located between a second blowout preventer and the first blow out preventer,
a choke line, and
a kill line, wherein both the kill line and choke line each have a quick connect collet connector;
landing the kill line collet connector on the kill line and the choke line collet connector on the choke line hub;
actuating each collet connector to bring a throughbore in the choke line hub and the kill line hub into sealing engagement with each collet connector throughbore; and
drilling a wellbore by introducing a drill head and drill string into the conductor pipe borehole, rotating the drill string, removing the drill string and drill head, installing casing, cementing the casing, and plugging the bottom of the casing.
2. The method of claim 1 , further comprising:
measuring formation pressure;
discontinuing drilling if the measured formation pressure exceeds a mud pressure;
closing at least one of the blowout preventers;
introducing drilling mud through the kill line to stabilize the downhole pressure and to flow the pressure differential out of the wellbore; and
restarting drilling.
3. The method of claim 1 , wherein a control system is used for autonomous removal and installation of the kill line assembly and the choke line assembly.
4. The method of claim 1 , wherein the kill line connector is hydraulically actuated.
5. The method of claim 1 , wherein the choke line connector is hydraulically actuated.
6. The method of claim 1 , wherein the kill line connector is electrically actuated.
7. The method of claim 1 , wherein the choke line connector is electrically actuated.