TURBINE FOR TRANSMITTING ELECTRICAL DATA
FIELD
[0001] The subject matter herein generally relates to a turbine for
transmitting electrical data from one end of the turbine to another end of
the turbine and more specifically, transmitting electrical data via a shaft
within the turbine and/or via the turbine body.
BACKGROUND
[0002] In drilling a well, the drillstring can include one or more
sensors to detect changes in the well and/or wellbore. The drilling
operation can limit the location of the sensors.
BRIEF DESCRIPTION OF THE DRAWINGS
[0003] Implementations of the present technology will now be
described, by way of example only, with reference to the attached figures,
wherein :
[0004] FIG. 1 is a diagram of a well including a wellbore and a turbine
in accordance with an exemplary embodiment;
[0005] FIG. 2 is a partial view of a turbine in accordance with an
exemplary embodiment;
[0006] FIG. 3 is a partial view of a turbine with a non-conducting
insulator in accordance with an exemplary embodiment;
[0007] FIG. 4 is a partial view of a turbine with a non-conducting
insulator in accordance with another exemplary embodiment;
[0008] FIG. 5 is a partial view of a turbine with non-conducting
insulators in accordance with yet another exemplary embodiment;
[0009] FIG. 6 is a partial view of a turbine with a conductor residing in
a channel of the shaft in accordance with an exemplary embodiment;
[0010] FIG. 7 is a partial view of a turbine with a conductor residing in
a channel of the shaft in accordance with another exemplary
embodiment;
[0011] FIG. 8 is a partial view of a turbine with a non-conducting
insulator and a conductor residing in a channel of the shaft in accordance
with an exemplary embodiment;
[0012] FIG. 9 is a partial view of a turbine with a non-conducting
insulator and a conductor residing in a channel of the shaft in accordance
with another exemplary embodiment;
[0013] FIG. 10 is a partial view of a turbine with a non-conducting
insulator and a conductor residing in a channel of the shaft in accordance
with yet another exemplary embodiment; and
[0014] FIGs. 11A-11B are partial views of a block diagram of a turbine
in accordance with an exemplary embodiment.
DETAILED DESCRIPTION
[0015] It will be appreciated that for simplicity and clarity of
illustration, where appropriate, reference numerals have been repeated
among the different figures to indicate corresponding or analogous
elements. In addition, numerous specific details are set forth in order to
provide a thorough understanding of the embodiments described herein.
However, it will be understood by those of ordinary skill in the art that the
embodiments described herein can be practiced without these specific
details. In other instances, methods, procedures and components have
not been described in detail so as not to obscure the related relevant
feature being described. Also, the description is not to be considered as
limiting the scope of the embodiments described herein. The drawings are
not necessarily to scale and the proportions of certain parts have been
exaggerated to better illustrate details and features of the
present disclosure.
[0016] In the following description, terms such as "upper," "upward,"
"lower," "downward," "above," "below," "downhole," "uphole,"
"longitudinal," "lateral," and the like, as used herein, shall mean in
relation to the bottom or furthest extent of, the surrounding wellbore
even though the wellbore or portions of it may be deviated or horizontal.
Correspondingly, the transverse, axial, lateral, longitudinal, radial, etc.,
orientations shall mean orientations relative to the orientation of the
wellbore or tool. Additionally, the illustrated embodiments are illustrated
such that the orientation is such that the right-hand side is downhole
compared to the left-hand side.
[0017] Several definitions that apply throughout this disclosure will
now be presented. The term "coupled" is defined as connected, whether
directly or indirectly through intervening components, and is not
necessarily limited to physical connections. The connection can be such
that the objects are permanently connected or releasably connected. The
term "outside" refers to a region that is beyond the outermost confines of
a physical object. The term "inside" indicate that at least a portion of a
region is partially contained within a boundary formed by the object. The
term "substantially" is defined to be essentially conforming to the
particular dimension, shape or other word that substantially modifies,
such that the component need not be exact. For example, substantially
cylindrical means that the object resembles a cylinder, but can have one
or more deviations from a true cylinder.
[0018] The term "radially" means substantially in a direction along a
radius of the object, or having a directional component in a direction
along a radius of the object, even if the object is not exactly circular or
cylindrical. The term "axially" means substantially along a direction of the
axis of the object. If not specified, the term axially is such that it refers
to the longer axis of the object.
[0019] The present disclosure is described in relation to an exemplary
turbine which can be used to transmit electrical data signals, for example
sensor data signals, across a downhole turbine using the motor shaft as a
leg of a first conducting path and the turbine body as a leg of a second
conductor path. As a result, a signal can be induced onto the shaft from a
lower end of the shaft, for example, motor shaft, to an upper end of the
shaft. The signal can be picked up, for example, induced, from the upper
end of the shaft by a receiver and then passed to a transmitter, for
example, a transmitter can be included in a measurement while drilling
(MWD) unit. When the transmitter is included in a MWD unit, the MWD
unit can include one or more additional components to process signals.
Additionally, the MWD can also be configured to receive signals from an
operation controller at the surface or other position upstream of the
MWD unit.
[0020] In one example, the MWD unit can process the signal and
transmit the signal to the surface using MWD communication, which can
be mud pulses or other telemetry systems. In other implementations, the
MWD can communicate using wireless or wired electrical, optical and/or
magnetic couplings. In one or more embodiments, a first inductive loop
or circuit can be positioned at one distal end of the motor and a second
inductive loop or circuit can be position at the other distal end of the
motor. In one or more embodiments, the shaft can include a channel
with an insulated wire residing in the channel with the sensor data being
transmitted via the insulated wire. As a result, one or more sensor units
can be positioned about at the motor and/or downhole from the motor
and provide communication to a communication unit uphole from the
sensor unit, and which is to be transmitted to the surface.
[0021] Referring to FIG 1, an example of a well according to the
present technology is illustrated. As illustrated, the wellbore 30 extends
into the earth from the surface 10. A drill string 40 extends through the
wellbore and includes a turbine 100 and a drill bit 50 at a distal end. The
drill bit is configured to cut into or otherwise remove material from the
surrounding formation so that the wellbore 30 can be formed. The
turbine 100 can be coupled to the drill bit 50 as illustrated. In other
embodiments, the turbine can be coupled to another component at the
downhole end and in turn coupled to the drill bit 50. In other
embodiments, one or more components can be coupled between the
turbine 100 and the drill bit 50.
[0022] Referring to FIG. 2, a partial view of a turbine in accordance
with an exemplary embodiment is illustrated. As shown, the partial view
is of a motor section of a turbine 100. The turbine 100 can include a
shaft 102 residing in a turbine body 104. In some embodiments, the
shaft 102 can include a first end 101 that is configured to be located
downhole of a second end 103. Additionally, the shaft can include an
intermediary portion 105 that couples the first end 101 with the second
end 103. In at least one embodiment, such as the one illustrated in
FIG. 2, a diameter of the intermediary portion 105 can be less than a
diameter of the first end 101 and the second end 103. Although shown,
with the shaft 102 in the center of the turbine body 104, the shaft 102
does not need to be in the center of the turbine body 104. The shaft 102
can be a rotating shaft, for example, a motor shaft. A motor 106 can be
located within the turbine 100. The motor 106 can include a rotor/stator
bundle (shown in FIG. 3). The rotor/stator bundle can include a plurality
of rotors, stators and bearings. The plurality of rotors, stators and
bearings can be interposed between the shaft 102 and the turbine body
104. As shown, the motor 106 can be interposed between a first end 101
and a second end 103 of the turbine 100.
[0023] One or more sensor units 12 (shown in FIGs. 11A and 11B) can
be positioned downhole from the motor 106. Data from the sensor
units 12, for example, sensor data, can be transmitted via the shaft 102
from the downhole side of the motor 106, across the motor 106 to the
uphole side of the motor 106. The sensor units 12 can be configured t o
determine data that can include formation parameters and/or tool
operating parameters, such as type of formation, rotational speed,
formation fluid detection, slip detection and other parameters. I n one or
more embodiments, one or more sensor units 12 can be positioned at
about the motor 106. The one or more sensor units 12 can include at
least one of motor parameters, formation parameters and tool operating
parameters. For example, the sensor data can be motor data. The
sensor data can be transmitted via the shaft 102 from a sensor unit 12 at
about the motor 106 through the motor 106 t o the uphole side of the
motor 106. In one or more embodiments, one or more sensor units 12
can be positioned uphole from the motor 106.
[0024] As shown in FIG. 2, a first signal path 108 can be generated via
the shaft 102 and the turbine body 104 if the signal path is shorted t o the
turbine body 104. A second signal path 110 can be generated via the
shaft 102 and the turbine body 104 if the signal path is shorted t o the
turbine body 104. The shorts (not shown) between the shaft 102 and the
turbine body 104 can be accomplished via a short circuit, for example, a
jumper wire, slip rings, contact bearings or other means. As a result, the
shaft 102 can be used to pass sensor data across the motor 106.
[0025] In one or more embodiments, a first inductive loop 112 can be
used to induce a signal on the shaft 102 and a second inductive loop 114
can be used t o receive the signal from the shaft 102. The first inductive
loop 112 and the second inductive loop 114 can be one or more toroids,
toroid coils, coils, slip rings or any other component that can induce a
current onto the shaft 102. The first inductive loop 112 can be downhole
from the second inductive loop 114. For example, the first inductive
loop 112 can induce current signals which travel on the shaft 102, for
example, via the first signal path 108, and the second inductive loop 114
can receive the induced current signals from the shaft 102. By varying
the current, data, such as sensor data, can be provided from one or more
sensor units 12, across the motor 106 and to the surface 10. The first
inductive loop 112 can be interposed between the motor 106 and the one
or more sensor units 12. The second inductive loop 114 can be
interposed between the motor 106 and a transmitter 712 (shown in FIG.
11A). The transmitter 712, such as a MWD unit or other telemetry device
can be used to transmit the data to the surface using known means in
the art.
[0026] Given that conventional turbines contain metal rotors, stators
and bearings, such components provide multiple potential paths and large
surface areas for leakage of the current hence loss of signal. To assist in
reducing such signal loss, one or more non-conducting insulators or
electrical insulators can be used. For example, one or more electrical
insulators can be interposed between the shaft 102 and the turbine
body 104 t o assist in reducing leakage paths along the shaft. I n another
example, one or more electrical insulators can be used to isolate the
shaft 102 and/or the turbine body 104 from the rotors, stators and
bearings.
[0027] Referring to FIG. 3, a partial view of a turbine with a non
conducting insulator in accordance with another exemplary embodiment is
illustrated. As shown, the shaft 102 of the turbine 100 and/or the bores
of the rotors 204 can be covered with a non-conducting insulator 202.
The non-conducting insulator 202 can assist in reducing metal-on-metal
contacts between an outer diameter of the shaft 102 and the bores of the
shaft mounted components, for example, rotors 204. To further assist in
reducing the leakage, a first non-conducting spacer 208 can be used t o
cover an outer surface of the shaft 102 at a first distal end of the
motor 106 and a second non-conducting spacer 210 can be used t o cover
the outer surface of the shaft 102 at a second distal end of the
motor 106. The non-conducting spacers 208, 210 can assist in reducing
axial leakage along the motor 106. For example, the non-conducting
spacers 208, 210 can assist in preventing an axial electrical flow path
along the rotors 204 and/or stators 206 bypassing the non-conducting
insulator 202 between them and the shaft 102 or turbine body 104.
[0028] Referring to FIG. 4, a partial view of a turbine with a non
conducting insulator in accordance with another exemplary embodiment.
As shown, a non-conducting insulator 202 can be applied between the
stators 206 and the turbine body 104. The non-conducting insulator 202
can assist in reducing metal-on-metal contacts between an inner surface
of the turbine body 104 and the stators 206. To further assist in reducing
the leakage, a first non-conducting spacer 208 can be used t o insulate an
inner surface of the turbine body 104 at a first distal end of the motor 106
and a second non-conducting spacer 210 can be used to insulate the
inner surface of the turbine body 104 at a second distal end of the
motor 106. The non-conducting spacers 208, 210 can assist in reducing
axial leakage along the motor 106. For example, the non-conducting
spacers 208, 210 can assist in preventing an axial electrical flow path
along the rotors 204 and/or stators 206 bypassing the non-conducting
insulator 202 between them and the shaft 102 or turbine body 104.
[0029] Referring to FIG. 5, a partial view of a turbine with non
conducting insulators in accordance with yet another exemplary
embodiment is illustrated. As shown, the shaft 102 of the turbine 100
and/or the bores of the rotors 204 can be coated with a non-conducting
insulator 202, for example, a non-conducting coating, and a non
conducting insulator 202, for example, a non-conducting coating, can be
applied between the stators 206 and the turbine body 104. The nonconducting
insulators 202 can assist in reducing metal-on-metal contacts
between an outer diameter of the shaft 102 and the bores of the shaft
mounted components, for example, rotors 204, and can assist in reducing
metal-on-metal contacts between an inner surface of the turbine
body 104 and the stators 206. To further assist in reducing the leakage,
first non-conducting spacers 208 can be used t o cover an outer surface of
the shaft and t o insulate an inner surface of the turbine body 104 at a
first distal end of the motor 106 and second non-conducting spacers 210
can be used t o cover an outer surface of the shaft and to insulate the
inner surface of the turbine body 104 at a second distal end of the
motor 106. The non-conducting spacers 208, 210 can assist in reducing
axial leakage along the motor 106. For example, the non-conducting
spacers 208, 210 can assist in preventing an axial electrical flow path
along the rotors 204 and/or stators 206 bypassing the non-conducting
insulator 202 between them and the shaft 102 or turbine body 104.
[0030] Referring to FIGs. 6 and 7, partial views of a turbine with a
conductor residing in a channel of the shaft in accordance with exemplary
embodiments are illustrated. As shown, the shaft 102 can include a
channel 604 with a conductor 602 residing in the channel 604. For
example, the channel 604 can be created by drilling the shaft 102 at
about the center of the shaft 102. The conductor 602 can be an insulated
wire or wires. The conductor 602 can be used to transmit the data, for
example, sensor data, across the motor 106, for example, the rotor/stator
bundle. As shown, in FIG. 6 and described above with respect to FIG. 2,
a first inductive loop 112 can be used to induce a signal on the
conductor 502 and a second inductive loop 114 can be used t o receive the
signal from the conductor 502.
[0031] As shown in FIG. 7, the conductor 502 can provide a
conductive path across the motor 106, for example, the rotor/stator
bundle. The conductor 502 can be communicatively coupled at a first end
which is downhole from the motor 106 and at a second end which is
uphole from the motor 106. As shown, the first end of the conductor 502
can be communicatively coupled t o the shaft 102 at a lower end at about
a lower toroid 702 and communicatively coupled to the shaft 102 at an
upper end at about an upper toroid 704. In one or more embodiments,
the conductor 502 can be communicatively coupled to the turbine
body 104 at the first end and/or second end. In one or more
embodiments, the conductor 502 can be communicatively coupled to
either the shaft 102 and/or turbine 104 at positions other than at about
the lower toroid 702 and/or upper toroid 704. Sensor data can be
induced onto conductor 502 in a similar manner as previously described.
[0032] The motor 106, for example, rotor/stator bundle, can be
electrically isolated from the lower and upper shaft portions. The
conductor 502 can eliminate the need t o use a non-conducting
insulator 202 along the full length of the shaft 104 or rotor bores 204 or
turbine body 104 thereby simplifying the arrangement. As shown, an
insulated lower shaft joint 706 and an insulated upper shaft joint 708 can
assist in electrically isolating the motor 106. For example, a non
conducting insulator 202 can insulate the shaft joints 706, 708. In one or
more embodiments, the rotors 204 can include a non-conducting
insulator 202. For example, the non-conducting insulator 202 can cover
the rotor bores 204.
[0033] Referring to FIGs. 8-10, partial views of a turbine with one or
more non-conducting insulators and a conductor residing in a channel of
the shaft in accordance with exemplary embodiments are illustrated. As
shown, the shaft 102 of the turbine 100 and/or the bores of the
rotors 204 can be coated with a non-conducting insulator 202, for
example, a non-conducting coating, and/or a non-conducting
insulator 202, for example, a non-conducting coating, can be applied
between the stators 206 and the turbine body 104. The non-conducting
insulators 202 can assist in reducing metal-on-metal contacts between an
outer diameter of the shaft 102 and the bores of the shaft mounted
components, for example, rotors 204, and can assist in reducing metalon-
metal contacts between an inner surface of the turbine body 104 and
the stators 206. To further assist in reducing the leakage, one or more
first non-conducting spacers 208 can be used to cover an outer surface of
the shaft and/or to insulate an inner surface of the turbine body 104 at a
first distal end of the motor 106 and/or one or more second nonconducting
spacers 210 can be used to cover an outer surface of the shaft
and/or to insulate the inner surface of the turbine body 104 at a second
distal end of the motor 106. The non-conducting spacers 208, 210 can
assist in reducing axial leakage along the motor 106. For example, the
non-conducting spacers 208, 210 can assist in preventing an axial
electrical flow path along the rotors 204 and/or stators 206 bypassing the
non-conducting insulator 202 between them and the shaft 102 or turbine
body 104.
[0034] Referring to FIGs. 11A and 11B, partial cross-sectional views of
a turbine 100 are illustrated in accordance with an exemplary
embodiment of the current disclosure. As shown, the turbine 100 can
have multiple components that are coupled together to form a
turbine 100. In other embodiments, the turbine 100 can omit one or
more of the components illustrated in FIGs. 11A and 11B. As shown in
FIG. 11A, the turbine 100 has an uphole end 10. The turbine 100 can
include a coupling device at the uphole end 10 to allow the turbine to be
coupled to a drillstring located uphole of the turbine. The turbine 10 can
include one or more sensor units 12. The one or more sensor units 12
can be communicatively coupled to a sensor transmitter 710. For
example, the turbine 10 can include a sensor transmitter 710, that is
located near the downhole end 20 of the turbine 10 and sensor
receiver 712, that is located near the uphole end 10 of the turbine 100.
The sensor receiver 712 can be a transceiver, for example, having a
receiver and a transmitter, such as a MWD. The turbine can also include
a shaft 102 that is surrounded by rotors and stators as described above.
As illustrated the shaft 102, turbines and rotors can continue for a
predetermined distance, which is not illustrated. For example, the
shaft 102 can run a substantial majority of the length of the turbine 100.
In other embodiments, the shaft 102 can be about half the length of the
turbine 100. In yet another embodiment, the shaft 102 can be about
two-thirds the length of the turbine 100. The configuration of the
shaft 102, stators, and rotors can be as described herein.
[0035] The turbine 100 can include one or more sensor units 12 that
are located along the turbine 100. These sensor units 12 can provide
data regarding drilling of the formation. The one or more sensor units 12
can be communicatively coupled in any suitable position but are typically
contained downhole from the motor 106. It is understood that the
electrical return path from the rotating shaft to the body is arranged such
that these points are above and below the upper and lower toroids, the
electrical contact path (in this embodiment) between the rotating and
non-rotating components is via radial contact bearings (not shown).
[0036] As described above, one or more non-conducting insulators
202 and/or one or more non-conducting spacers 208, 210 can be utilized.
I n one or more embodiments, the one or more non-conducting
insulators 202 and/or the one or more non-conducting spacers 208, 210
can be a non-conducting coating or non-conducting sleeve. For example,
the coating can be Scotchkote™ Fusion-bonded epoxy 134 by 3M of St.
Paul, Minnesota or any other suitable material. I n one or more
embodiments, the non-conducting sleeve can be nylon, plastic, ceramic,
glass or other suitable non-conducting material. In one or more
embodiments, the sleeve can be a coated with a non-conductive material,
such as Scotchkote™ Fusion-bonded epoxy 134. The effect of the non
conducting insulator 202 can be further enhanced by the use of a nonconducting
lubricant between the contact surfaces.
[0037] In one or more embodiments, a non-conducting lubricant can
be used to reduce the metal-on-metal contacts between the different
components. However, in one or more implementations conductive
lubricant, such as drilling fluid having a high chloride content which can
cause the lubricant t o be conductive, can be used. To further reduce
conduction, one or more of the metal components can be covered with a
non-conducting insulator 202, such as Scothkote™ Fusion-bonded
epoxy 134.
[0038] Other components have not been described in full detail so as
to not obscure the details of the present technology as it relates to the
claimed subject matter.
[0039] The embodiments shown and described above are only
examples. Many details are often found in the art such as the other
features of a logging system. Therefore, many such details are neither
shown nor described. Even though numerous characteristics and
advantages of the present technology have been set forth in the foregoing
description, together with details of the structure and function of the
present disclosure, the disclosure is illustrative only, and changes may be
made in the detail, especially in matters of shape, size and arrangement
of the parts within the principles of the present disclosure to the full
extent indicated by the broad general meaning of the terms used in the
attached claims. It will therefore be appreciated that the embodiments
described above may be modified within the scope of the appended
claims.
CLAIMS
What is claimed is:
1. A turbine (100) having a first end (101) and a second end (103)
with the first end (101) and the second end (103) being opposite one
another, the turbine (100) comprising :
a turbine body (104);
a shaft (102) positioned at about the center of the turbine
body (104);
a motor (106) comprising a plurality of rotors (204), stators (206)
and bearings interposed between the shaft (102) and the turbine
body (104), the motor (106) interposed between the first end (101) and
the second end (103) of the turbine (100); and
at least one non-conductor insulator (202) assisting in electrically
isolating the shaft (102) and the turbine body (104) from one another,
wherein the non-conductor insulator (202) is interposed between the
turbine body (104) and the plurality of rotors (204), stators (206) and
bearings, or is interposed between the shaft (102) and the plurality of
rotors (204), stators (206) and bearings.
2 . The turbine (100) of claim 1 further comprising :
a sensor unit (12) configured to generate sensor data; and
a sensor transmitter (710) communicatively coupled to the sensor
unit (12) and configured to transmit the generated sensor data to a first
end of the motor (106) via the shaft (102).
3 . The turbine (100) of claim 2 further comprising :
a first inductive loop (112) interposed between the motor (106) and
the sensor transmitter (710), the first inductive loop (106) configured to
induce a current on the shaft (102); and
a second inductive loop (114) interposed between the motor (106)
and a receiver (712), the second inductive loop (114) configured to
inversely induce the current from the shaft (102), with the current
representing the generated sensor data.
4 . The turbine (100) of claim 3 wherein each of the first inductive
loop ( 112) and the second inductive loop (114) is one of an inductive coil
and a slip ring.
5 . The turbine (100) of claim 3 further comprising a data
transmitter (712) interposed between the second inductive loop (114)
and the second end (103) of the turbine, the data transmitter (712)
communicatively coupled to the second inductive loop (114) and
configured to transmit the generated sensor data.
6 . The turbine (100) of claim 5 wherein the data transmitter (712) is a
measurement while drilling (MWD) transmitter.
7 . The turbine (100) of claim 2 wherein the sensor unit (12) is located
at about the motor (106).
8 . The turbine (100) of claim 7 wherein the generated sensor data is
related to the motor (106).
9 . The turbine (100) of claim 2 wherein the sensor unit (12) is
interposed between the motor (106) and the first end (101) of the
turbine (100) with the first end (101) of the turbine being down hole from
the second (103) end of the turbine (100) when the turbine (100) is
inserted in a down hole.
10. The turbine (100) of claim 9 wherein the generated sensor data
represents at least one of formation parameters and tool operating
parameters.
11. The turbine (100) of claim 2 wherein the non-conducting
insulator (202) interposed between the turbine body (104) and the
plurality of rotors (204), stators (206) and bearings is a non-conducting
coating on an outer surface of the shaft (102).
12. The turbine (100) of claim 11 further comprising a first non
conducting spacer (208) covering an outer surface of the shaft (102) at a
first distal end of the motor and a second non-conducting spacer (210)
covering the outer surface of the shaft (102) at a second distal end of the
motor (106).
13. The turbine (100) of claim 12 further comprising a non-conducting
lubricant between contact surfaces of the plurality of rotors (204),
stators (206) and bearings.
14. The turbine (100) of claim 2 wherein the non-conducting
insulator (202) interposed between the turbine body (104) and the
plurality of rotors (204), stators (206) and bearings is a non-conducting
coating on bores of the rotors (204).
15. The turbine (100) of claim 14 further comprising a first non
conducting spacer (208) interposed between the turbine body (104) and a
first distal end of the motor (106) and a second non-conducting
spacer (210) covering the turbine body (104) at a second distal end of
the motor (106).
16. The turbine (100) of claim 15 further comprising a non-conducting
lubricant between contact surfaces of the plurality of rotors (204),
stators (206) and bearings.
17. The turbine (100) of claim 2 further comprising a conductor (502) in
a channel (504) of the shaft (102), the conductor (502) communicatively
coupled to the sensor transmitter (710) at a first end and to a data
transmitter (712) at a second end, wherein the sensor transmitter (710)
is interposed between the motor (106) and the first end (101) of the
turbine (100) with the first end (101) of the turbine (100) adapted t o be
down hole from a second end (103) of the turbine (100) and the data
transmitter (712) interposed between the motor (106) and the second
end (103) of the turbine (106) with the second end (103) of the
turbine (100) adapted to be up hole from the motor (106).
18. The turbine (100) of claim 15 wherein the conductor (502) is one of
an insulated wire (604) and a plurality of insulated wires (604).
19. The turbine (100) of any one of claims 1-18 wherein the shaft
(102) is a motor shaft.
20. The turbine (100) of any one of claims 1-18 wherein the shaft
(102) is a rotating shaft.