1. A liner hanger fluid diverter tool assembly comprising:
a fluid diverter tool comprising:
a tool body having a central bore therethrough and a bypass port formed in an outer diameter thereof;
a spring-biased piston disposed within the tool body;
a piston port in the spring-biased piston configured to axially align with the bypass port to control fluid flow outward from the central bore;
a rotatable ball valve aligned within the central bore of the tool body and configured to control fluid flow through the central bore when rotated on a pin between closed and open positions within the spring-biased piston, the pin extending between the rotatable ball valve and the spring-biased piston; and
wherein the bypass port and the ball valve are configured to be cycled multiple times between open and closed positions while in a wellbore;
a liner hanger running tool attached below the fluid diverter tool; and
a camming device configured to rotate the rotatable ball valve between open and closed positions, the camming device comprising:
a cam slot disposed on an outer surface of the rotatable ball valve, the cam slot comprising a cam slot mouth and a cam slot channel; and
a camming pin disposed on an inner surface of the piston, wherein the camming pin is guided into the cam slot channel upon axial translation of the spring-biased piston to rotate the rotatable ball valve by the cam slot mouth.
2. The tool of claim 1, wherein the camming pin and cam slot are off-centered from a rotational axis of the rotatable ball valve.
3. The tool of claim 1, further comprising a shear pin configured to fail to allow a snap ring to engage a corresponding groove in the piston to lock the bypass port in a closed position and the ball valve in an open position.
4. The tool of claim 3, wherein a pressure in the central bore of between about 1000 and 1600 psi causes the shear pin to fail.
5. The tool of claim 1, wherein the bypass port is open and the ball valve is closed as the fluid diverter tool is run into the wellbore.
6. The tool of claim 1, wherein the bypass port is closed and the ball valve is opened in the wellbore.
7. A method for installing liners in a wellbore comprising:
running an assembly comprising a fluid diverter tool, liner hanger running tool, liner hanger and liner into the wellbore, wherein the fluid diverter tool provides a fluid crossover from a central bore to an outer diameter of the fluid diverter tool with a bypass port, and wherein the liner hanger running tool is downhole of the fluid diverter tool and above the liner hanger and liner;
cycling a piston via fluid pressure inputs to open and close the bypass port and control fluid flow out from the central bore of the fluid diverter tool; and
simultaneously cycling a ball valve disposed in the central bore between open and closed positions, via fluid pressure inputs, to control fluid flow through the central bore, wherein the bypass port and the ball valve are cycled between open and closed positions multiple times.
8. The method of claim 7, wherein when running the fluid diverter tool into the wellbore the bypass port is in the open position and the ball valve is closed.
9. The method of claim 8, further comprising closing the bypass port and opening the ball valve.
10. The method of claim 7, further comprising permanently closing the bypass port and opening the ball valve when the liner reaches a desired depth in the wellbore.
11. The method of claim 10, wherein the permanently closing comprises shearing at least one shear pin and engaging a snap ring with a corresponding groove in the piston.
12. The method of claim 11, further comprising increasing pressure in the central bore to between about 1000 and 1600 psi to shear the at least one shear pin.
13. The method of claim 7, further comprising providing a camming device for cycling the ball valve between the open and closed positions.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A method for exchanging a first detector module (m), including K channels (x) from k to j in an X-ray detector in a computed tomograph including a module configuration a with a total of M detector modules and KM channels, for a second detector module (m), wherein the first detector module includes an associated correction table (TS(a,m,x)), for eliminating temperature-dependent signal changes, which is dependent on the respective module configuration of the detector and is recreatable following the exchange of a detector module, comprising:
creating, for the first and second detector modules in a detector in a reference computed tomograph including the module configuration b, a respective correction table (TS(b,m,x), TS(b,mx);
ascertaining difference values in the correction tables; and
calculating a new correction table (TS(a,m,x)), for operating the second detector module (m) in the computed tomograph including the module configuration a, by transferring the ascertained difference values to the old correction table (TS(a,m,x)).
2. The method as claimed in claim 1, wherein individual values for the new correction table (TS(a,mx)) are calculated on the following basis:
7
S
a
,
m
,
x
=
S
b
,
m
,
x
+
1
K
(
i
=
k
j
S
a
,
m
,
i
–
i
=
k
j
S
b
,
m
,
i
)
where n is the number of channels of a detector module from channel k to j, Sn,o,p corresponds to the correction value s for the module configuration n with the detector module o, and the channel x is an element of the channels k to j.
3. The method as claimed in claim 1, wherein, in the event of failure of a channel (i) of the detector module (m) which is to be exchanged, the signal values (S) for the channel are calculated by at least one of interpolating and extrapolating adjacent channels.
4. The method as claimed in claim 1, wherein a channel (i) is regarded as being faulty if the measured signal values (S) for the channel (i) exceed a prescribed limit value.
5. The method as claimed in claim 1, wherein the new correction table (TS(a,m x)) is created by reverting to a correction table (TS(a,m,x)) measurement which was created and archived prior to failure.
6. The method as claimed in claim 1, wherein the new correction table (TS(a,m,x)) is created by reverting to a correction table (TS(b,m,x)) measurement which was created and archived prior to failure, preferably before the computed tomograph was delivered.
7. The method as claimed in claim 1, wherein the first and second detector modules are at the same position.
8. The method as claimed in claim 1, wherein the differences in the correction tables are ascertained in an area of the channels of the detector module which is to be exchanged.
9. The method as claimed in claim 2, wherein, in the event of failure of a channel (i) of the detector module (m) which is to be exchanged, the signal values (S) for the channel are calculated by at least one of interpolating and extrapolating adjacent channels.
10. The method as claimed in claim 3, wherein a channel (i) is regarded as being faulty if the measured signal values (S) for the channel (i) exceed a prescribed limit value.
11. The method as claimed in claim 5, wherein the new correction table TS(a,m,x)) is created by reverting to a correction table (TS(a,m,x)) measurement which was created and archived before the computed tomograph was delivered.
12. The method as claimed in claim 3, wherein the new correction table (TS(a,m,x)) is created by reverting to a correction table (TS(a,m,x)) measurement which was created and archived prior to failure.
13. The method as claimed in claim 4, wherein the new correction table (TS(a,m,x)) is created by reverting to a correction table (Ts(a,m,x)) measurement which was created and archived prior to failure.
14. The method as claimed in claim 6, wherein the new correction table (TS(a,m,x)) is created by reverting to a correction table (TS(b,m,x)) measurement which was created and archived before the computed tomograph was delivered.
15. The method as claimed in claim 3, wherein the new correction table (TS(a,m,x)) is created by reverting to a correction table (TS(b,m,x)) measurement which was created and archived prior to failure.
16. The method as claimed in claim 4, wherein the new correction table (TS(a,m,x)) is created by reverting to a correction table (TS(b,m,x)) measurement which was created and archived prior to failure.