US 11,746,632 B2
Method for fracking operations utilizing a multi-pressure fracking adapter
Michael D. Scott, Oklahoma City, OK (US)
Filed by Michael D. Scott, Oklahoma City, OK (US)
Filed on Nov. 5, 2020, as Appl. No. 17/89,918.
Claims priority of provisional application 62/961,485, filed on Jan. 15, 2020.
Prior Publication US 2021/0215027 A1, Jul. 15, 2021
Int. Cl. E21B 43/26 (2006.01); E21B 47/117 (2012.01); E21B 34/02 (2006.01); E21B 33/06 (2006.01); E21B 33/03 (2006.01)
CPC E21B 43/2607 (2020.05) [E21B 33/03 (2013.01); E21B 33/06 (2013.01); E21B 34/02 (2013.01); E21B 47/117 (2020.05)] 11 Claims
OG exemplary drawing
 
1. An improved method for fracking operations of the type having the following steps:
a. preparing a selected well;
b. affixing a low-pressure casing head to a surface casing;
c. attaching a blowout preventer to the low-pressure casing head;
d. testing the low-pressure casing head and the blowout preventer for proper functionality;
e. extending a drill string into the earth to form a borehole to a first desired depth;
f. installing a casing string to a second desired depth in the borehole;
g. cementing the casing string in the second desired depth;
h. removing the blowout preventer attached to the low-pressure casing head;
i. securing within the casing string a hanger device inside the low-pressure casing head;
j. removing and replacing the low-pressure casing head with a high-pressure casing head to match the pressure rating of a frack valve assembly;
k. installing a high-pressure tubing head;
l. removing drilling rig;
m. attaching a higher pressure frack valve assembly to the top of the high-pressure tubing head, and testing at least one seal;
n. performing fracking operations on the selected well;
o. removing the frack valve assembly;
p. replacing the high-pressure tubing head with a low-pressure tubing head; and,
q. preparing the selected well for production,
the improvement comprising:
A) after step f and before step g, adding the following steps:
i) measuring the last piece of the casing string;
ii) installing a suspension device to the last piece of the casing string;
B) after step g and before step h, adding the step of installing a temporary pack-off bushing into the casing head on the suspension device;
C) replacing steps i through l, with the following steps:
i) affixing a two-way check valve into back-pressure valve threads in the suspension device;
ii) attaching a fracking adapter rated up to twice the pressure rating of the casing head;
iii) pressurizing the fracking adapter to test each seal to ensure proper sealing integrity;
D) replacing step p with the following steps:
i) installing a bypass valve;
ii) installing a permanent pack-off bushing; and,
iii) installing the low-pressure tubing head.