Language selection

Search

Patent 2866005 Summary

Third-party information liability

Some of the information on this Web page has been provided by external sources. The Government of Canada is not responsible for the accuracy, reliability or currency of the information supplied by external sources. Users wishing to rely upon this information should consult directly with the source of the information. Content provided by external sources is not subject to official languages, privacy and accessibility requirements.

Claims and Abstract availability

Any discrepancies in the text and image of the Claims and Abstract are due to differing posting times. Text of the Claims and Abstract are posted:

  • At the time the application is open to public inspection;
  • At the time of issue of the patent (grant).
(12) Patent: (11) CA 2866005
(54) English Title: PRESSURE RELIEF RISER FOR A PRODUCTION TANK
(54) French Title: COLONNE MONTANTE A LIMITEUR DE PRESSION POUR RESERVOIR DE PRODUCTION
Status: Granted
Bibliographic Data
(51) International Patent Classification (IPC):
  • B65D 90/00 (2006.01)
(72) Inventors :
  • LIPINSKI, JOHN (Canada)
(73) Owners :
  • TRINITY HIGH - TECH PRODUCTS LTD. (Canada)
(71) Applicants :
  • TRINITY HIGH - TECH PRODUCTS LTD. (Canada)
(74) Agent: WOODRUFF, NATHAN V.
(74) Associate agent:
(45) Issued: 2015-06-23
(22) Filed Date: 2014-09-26
(41) Open to Public Inspection: 2015-01-26
Examination requested: 2014-10-31
Availability of licence: N/A
(25) Language of filing: English

Patent Cooperation Treaty (PCT): No

(30) Application Priority Data: None

Abstracts

English Abstract

A production tank having a tank enclosure defined by a roof, a floor and a sidewall, one or more fluid inlets and one or more fluid outlets in fluid communication with the tank enclosure, and a fluid container for receiving overflow fluids. A pressure- relief riser has a first end in fluid communication with the fluid container and a second end positioned below the roof and above the one or more fluid outlets, the second end being in fluid communication with the tank enclosure. A frangible seal seals the pressure-relief riser that breaks upon application of a predetermined pressure.


French Abstract

Un réservoir de production ayant une enceinte de réservoir définie par un toit, un plancher, un mur latéral, au moins une entrée de fluide et au moins une sortie de fluide en communication fluide avec l'enceinte de réservoir, et un récipient de fluide pour recevoir le surplus de fluides. Une colonne montante de dépression munie d'une première extrémité en communication fluide avec le récipient de fluide et une deuxième extrémité placée sous le toit et au-dessus la ou les sorties de fluide, la deuxième extrémité étant en communication fluide avec l'enceinte de réservoir. Un sceau frangible scelle la colonne montante de dépression qui brise lors de l'application d'une pression prédéterminée.

Claims

Note: Claims are shown in the official language in which they were submitted.


10

What is Claimed is:
1. A production tank, comprising:
a tank enclosure defined by a roof, a floor and a sidewall;
one or more fluid inlets in fluid communication with the tank enclosure;
one or more fluid outlets in fluid communication with the tank enclosure;
a fluid container for receiving overflow fluids;
a pressure-relief riser having a first end in fluid communication with the
fluid
container and a second end positioned below the roof and above the one or more
fluid outlets,
the second end being in fluid communication with the tank enclosure; and
a frangible seal that seals the pressure-relief riser, the frangible seal
breaking upon
application of a predetermined pressure.
2. The production tank of claim 1, wherein the frangible seal is positioned
toward the
first end of the pressure-relief riser.
3. The production tank of claim 1, wherein:
the fluid container is recessed within the sidewall and is separate from the
tank
enclosure; and
the first end of the pressure-relief riser is positioned within the tank
enclosure.
4. The production tank of claim 1, wherein the fluid container is outside
the tank
enclosure.
5. The production tank of claim 4, wherein the fluid container is a
collapsible container.
6. The production tank of claim 1, wherein the one or more fluid outlets
comprise a
plurality of outlet risers that extend to a plurality of outlet heights within
the tank enclosure,
the second end of the pressure-relief riser being above the highest of the
plurality of outlet
heights.
7. A method of relieving pressure in a production tank comprising a tank
enclosure

11

defined by a roof, a floor, and a sidewall, the production tank further
comprising one or more
fluid inlets in fluid communication with the tank enclosure and one or more
fluid outlets in
fluid communication with the tank enclosure, the method comprising the steps
of:
mounting a pressure-relief riser to the production tank, the pressure-relief
riser having
a first end in fluid communication with a fluid container and a second end
positioned below
the roof and above the one or more fluid outlets of the production tank, the
second end being
in fluid communication with the tank enclosure;
attaching a frangible seal to seal the pressure-relief riser, the frangible
seal being
designed to break upon application of a predetermined pressure; and
filling the production tank with production fluids.
8. The method of claim 7, further comprising the steps of:
permitting fluids to enter pressure relief riser, the fluids breaking the
frangible seal to
break upon application of the predetermined pressure; and
collecting fluids within the fluid container.
9. The method of claim 7, wherein the predetermined pressure comprises at
least one of
a fluid pressure applied by fluid within the pressure-relief riser, a
pneumatic pressure within
the tank enclosure and a vacuum pressure within the tank enclosure.
10. The method of claim 7, wherein the frangible seal is positioned toward
the first end of
the pressure-relief riser.
11. The method of claim 7, wherein:
the fluid container is recessed within the sidewall and is separate from the
tank
enclosure; and
the first end of the pressure-relief riser is positioned within the tank
enclosure.
12. The method of claim 7, wherein the fluid container is outside the tank
enclosure.
13. The method of claim 12, wherein the fluid container is a collapsible
container.

12

14. The method of
claim 7, wherein the one or more fluid outlets comprise a plurality of
outlet risers that extend to a plurality of outlet heights within the tank
enclosure, the second
end of the pressure-relief riser being above the highest of the plurality of
outlet heights.

Description

Note: Descriptions are shown in the official language in which they were submitted.


CA 02866005 2014-09-26
PRESSURE RELIEF RISER FOR A PRODUCTION TANK
TECHNICAL FIELD
[0001] This relates to a pressure relief riser for a production tank.
BACKGROUND
[0002] Production tanks on well sites are used to collect fluids produced
from a
hydrocarbon-producing well. Damage, such as environmental damage and damage to

equipment, may occur if the production tanks are not properly vented or if the
production
tanks are overfilled. Most tanks are designed with vents and level sensors to
help reduce the
risk of overfilling and to reduce pressure differentials between the inside of
the tanks and the
ambient pressure.
SUMMARY
[0003] According to an aspect, there is provided a production tank,
comprising a tank
enclosure defined by a roof, a floor and a sidewall, one or more fluid inlets
in fluid
communication with the tank enclosure, one or more fluid outlets in fluid
communication
with the tank enclosure, a fluid container for receiving overflow fluids, a
pressure-relief riser
having a first end in fluid communication with the fluid container and a
second end positioned
below the roof and above the one or more fluid outlets, the second end being
in fluid
communication with the tank enclosure, and a frangible seal that seals the
pressure-relief riser,
the frangible seal breaking upon application of a predetermined pressure.
[0004] According to another aspect, the frangible seal may be positioned
toward the first
end of the pressure-relief riser.
[0005] According to another aspect, the fluid container may recessed
within the sidewall
and may be separate from the tank enclosure, and the first end of the pressure-
relief riser may
be positioned within the tank enclosure.
[0006] According to another aspect, the fluid container may be outside
the tank
enclosure.

CA 02866005 2014-09-26
[0007] According to another aspect, the fluid container may be a
collapsible container.
[0008] According to another aspect, the one or more fluid outlets may
comprise a
plurality of outlet risers that extend to a plurality of outlet heights within
the tank enclosure,
the second end of the pressure-relief riser being above the highest of the
plurality of outlet
heights.
[0009] According to an aspect, there is provided a method of relieving
pressure in a
production tank comprising a tank enclosure defined by a roof, a floor, and a
sidewall, the
production tank further comprising one or more fluid inlets in fluid
communication with the
tank enclosure and one or more fluid outlets in fluid communication with the
tank enclosure,
the method comprising the steps of mounting a pressure-relief riser to the
production tank, the
pressure-relief riser having a first end in fluid communication with a fluid
container and a
second end positioned below the roof and above the one or more fluid outlets
of the
production tank, the second end being in fluid communication with the tank
enclosure,
attaching a frangible seal to seal the pressure-relief riser, the frangible
seal being designed to
break upon application of a predetermined pressure, and filling the production
tank with
production fluids.
[0010] According to another aspect, the method may further comprise the
steps of
permitting fluids to enter pressure relief riser, the fluids breaking the
frangible seal to break
upon application of the predetermined pressure and collecting fluids within
the fluid
container.
[0011] According to another aspect, the predetermined pressure may comprise
at least
one of a fluid pressure applied by fluid within the pressure-relief riser, a
pneumatic pressure
within the tank enclosure, and a vacuum pressure within the tank enclosure.
[0012] According to another aspect, the frangible seal may be positioned
toward the first
end of the pressure-relief riser.

CA 02866005 2014-09-26
3
[0013] According to another aspect, the fluid container may be recessed
within the
sidewall and is separate from the tank enclosure and the first end of the
pressure-relief riser
may be positioned within the tank enclosure.
[0014] According to another aspect, the fluid container may be outside the
tank
enclosure.
[0015] According to another aspect, the fluid container may be a
collapsible container.
[0016] According to another aspect, the one or more fluid outlets may
comprise a
plurality of outlet risers that extend to a plurality of outlet heights within
the tank enclosure,
the second end of the pressure-relief riser being above the highest of the
plurality of outlet
heights.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] These and other features will become more apparent from the
following
description in which reference is made to the appended drawings, the drawings
are for the
purpose of illustration only and are not intended to be in any way limiting,
wherein:
FIG. 1 is a side elevation view of a production tank with a pressure-relief
riser.
FIG. 2 is a side elevation view of an alternate production tank with a
pressure-
relief riser.
FIG. 3 is a side elevation view of the production tank of FIG. 2 releasing
liquid.
FIG. 4 is a side elevation view of the production tank of FIG. 2 releasing
foam.
FIG. 5 is a side elevation view of a further alternate production tank with a
pressure-relief riser.
FIG. 6 is a side elevation view of the production tank of FIG. 5 with the
container
being filled with fluid.
FIG. 7 is a side elevation view in section of a frangible membrane.
FIG. 8 is a side elevation view in section of an alternate frangible membrane.
FIG. 9 is a side elevation view in section of a further alternate frangible
membrane.

CA 02866005 2014-09-26
4
FIG. 10 is a side elevation view in section depicting an alternate position
for
frangible membrane.
FIG. 11 is a side elevation view of a further alternative of a production
tank.
DETAILED DESCRIPTION
[0018] A production tank, generally identified by reference numeral 10,
will now be
described with reference to FIG. 1 through 11. While the description and
drawings relate to a
particular design, it will be understood that the pressure-relief mechanism
described herein
may be applied to other types and designs of production tanks as known in the
art.
[0019] Referring to FIG. 1, production tank 10 has a tank enclosure 12
defined by a roof
14, a floor 16 and a sidewall 18. There is shown fluid inlet 20 in fluid
communication with
tank enclosure 12, although there may be more than one. Fluid inlet 20 is
designed to be
connected to a source of fluid, such as a well (not shown), and to receive the
fluids produced
from the well. When connected to a well, the produced fluids will include
sand, water, liquid
hydrocarbons, and possibly some gaseous hydrocarbons. Depending on the demands
place
on the well, there may be some initial separation prior to depositing the
fluids into the
production tank, although any separation steps taken at this time will not
remove all of a
single component. As shown in FIG. 1, there is a sand layer 22, a water layer
24, an oil layer
26, and a gas layer 28. Gas layer 28 may be ambient air, gaseous hydrocarbons
from the
production fluids, or more commonly, a mixture of both. In addition to these
components,
referring to FIG. 4, there may also be a layer of foam 30 that forms on top of
oil layer 26. The
components of produced fluids and how the components are managed are well
known in the
art and will not be described further.
[0020] In the oil and gas industry, production tanks are used to store
fluids until the fluids
can be transported. There may be more than one production tank on a site, and
the production
tanks will generally have more features than what is shown. In particular,
there is generally a
series of vents and access points on the top of a production tank, and there
may be fluid level
indicators or sensors, and the like. In the depicted example, production tank
10 is shown with
a thief hatch 32 and a vent 33 on roof 14. Thief hatches are used to provide
internal access to

CA 02866005 2014-09-26
tank enclosure 12, and generally include a two-way pressure relief valve to
prevent over- or
under-pressurization of production tank 10, as production tanks are generally
designed to hold
the necessary amount of fluid, but are not designed to be pressure vessels.
Other vents or
attachments may be provided as will be known in the art. Also shown in some
embodiments
5 is an enclosure 34 that is recessed within sidewall 18 but is isolated
from tank enclosure 12.
One suitable type of enclosure is sold under the name Enviro-Vaultl M.
Generally, enclosure
34 is used to enclose connections, as shown in FIG. 1, to protect them from
damage and from
the elements, as the fluids in enclosure 12 are generally heated, which will
also heat enclosure
12. Enclosure 34 may also be used as a liquid container, as shown in FIG. 2
and will be
described in greater detail below.
[0021] As shown,
production tank 10 has outlets 36 with corresponding risers 38 that
extend to different heights. Outlets 36 allow an operator to withdraw fluids
from different
layers within enclosure 12. While
three outlets 36 are depicted with risers 38 at three
different heights, there may only be two, or any number as desired by the
user. Referring to
FIG. 1, outlets 36 are positioned within enclosure 34. Enclosure 34 acts as a
fluid container
for receiving overflow fluids and catching any drips or leaks that may occur
while removing
fluid from tank enclosure 12 through outlets 36.
[0022] Referring to FIG. 1, there is shown a pressure-relief riser 40 that
extends along the
height of tank 10. Pressure-relief riser 40 has a first end 42 in fluid
communication with
enclosure 34, which as depicted acts as a fluid container, and a second end 44
that is
positioned below roof 14 and above the risers 38 of fluid outlets 36 and is in
fluid
communication with tank enclosure 12. Pressure-relief riser 40 is preferably
positioned
within enclosure 12 as shown in FIG. 1 to protect against the elements, but
may also be
installed outside enclosure 12, as shown in FIG. 5. This may be preferable,
for example,
when pressure-relief riser 40 is retro-fitted onto tank 10, or to minimize the
exposure to the
production fluids. Alternatively, pressure-relief riser 40 may be installed by
inserting it
through thief hatch 32 and mounting it to thief hatch 32. This may be
beneficial as it requires
fewer modifications to tank 10. In another embodiment, pressure relief riser
40 may also be
installed by attaching riser 40 to thief hatch 32. Preferably, second end 44
of riser 40 will be

CA 02866005 2014-09-26
6
below the lowest vent or thief hatch on the top of production tank 10 such
that any overflow
first flow through riser 40. While not shown, this may be done, for example,
by
disconnecting thief hatch 32 from the flange to which it is connected and
attach an additional
riser between the flange and thief hatch 32. Second end 44 is attached to this
riser.
[0023] As shown in FIG. 1, the fluid container may be an enclosure 34
similar to an
EnviroVaultTM enclosure that has a fluid containment section at the bottom.
For example,
enclosure 34 may be designed to hold around 1 m3 of fluid. Enclosure 34 may be
the same
enclosure in which outlets 36 or other equipment are housed, or it may be a
separate
enclosure, as shown in FIG. 2. Other types of internal containers may also be
used.
Alternatively, referring to FIG. 5 and 6, the fluid container may be an
external fluid container
45. This may be a separate tank that is on site, an open reservoir, or, as in
the depicted
example, an expandable container that can either be collapsed or rolled up
when empty.
Referring to FIG. 2, there may be both external fluid container 45 as well as
enclosure 34,
where fluid container 45 is connected by a connection point 47 that is
positioned below the
access point 49 of enclosure 34. Also, while not shown, there may be multiple
containers 45
connected in series or in parallel. This gives operators a significant amount
of variable
storage that can be collapsed or stored when not required.
[0024] Second end 44 of pressure-relief riser 40 is intended to be
positioned above the
draw-point for outlets 36 such that it does not interfere with the normal
operation of tank 10.
Second end 44 is preferably high enough that it is only used under emergency
circumstances.
The height may vary depending on the preferences of the user, but must be
positioned within
enclosure 12.
[0025] Referring to FIG. 7 ¨ 9, pressure-relief riser 40 has a pressure-
responsive seal 46
that seals pressure-relief riser 40 under normal circumstances and is designed
to open in
emergency conditions, such as when a predetermined amount of pressure is
applied to
pressure-responsive seal 46. For example, pressure-responsive seal 46 may be
designed to
withstand a certain amount of pressure that may be due to a certain level of
fluid within
pressure-relief riser, a vacuum pressure being applied within enclosure 12, or
a positive
pressure being applied within enclosure 12. Generally speaking, vacuum or
positive

CA 02866005 2014-09-26
7
pressures will be dealt with by vents 32, such as an open vent, or a thief
batch that is designed
to open when the internal pressure reaches a certain level relative to ambient
temperature.
However, it may occur that these vents are blocked and that a backup vent is
necessary to
prevent or reduce potential damage or harm.
[0026] Preferably, pressure-responsive seal 46 is positioned at or toward
first end of
pressure-relief riser 40 to allow sufficient fluid pressure to build up within
pressure-relief riser
40 to open pressure-responsive seal 46. This also allows easier access to
pressure-responsive
seal 46 when it is necessary to be replaced or serviced. Other positions may
also be used that
allow for the same function. Referring to FIG. 7 ¨ 9, pressure-responsive seal
46 may take
various forms, such as a frangible membrane, and be attached in various ways.
In FIG. 7,
pressure-relief riser 40 has a second part 48 that attaches, such as by
threading, friction fit, etc.
into the bottom of pressure relief riser 40 and frangible membrane 46 is
attached between the
bottom of pressure-relief riser 40 and second part 48. Referring to FIG. 8,
pressure-relief riser
40 has a second part 48 that carries frangible membrane 46 as an insert. This
may be
designed as a disposable component that is replaced as needed. In this
example, frangible
membrane 46 may be integrally formed with second part 48. Alternately, a new
frangible
membrane 46 may be mounted within second part 48 when an existing seal breaks.
Frangible
membrane 46 may also be attached into pressure-relief riser 40 directly
without removing or
having a separate second part 48. Referring to FIG. 9, frangible membrane 46
may also be
mounted to the bottom of pressure-relief riser 40, such as by using an
attachment 50 that
surrounds the outside of pressure-relief riser 40. An adhesive may also be
used. Referring
to FIG. 10, frangible membrane 46 may also be mounted to second end 44 of
pressure-relief
riser 40. In some circumstances, this may be preferable to prevent sour gas
(H2S) from
entering pressure-relief riser 40 during normal operation. In some
embodiments, it may be
useful to form frangible membrane 46 from a material that weakens when in
contact with
hydrocarbons. This may be useful, for example, when frangible membrane 46 is
at the top of
riser 40 and is not exposed to the same hydrostatic pressure that may be
applied when at the
bottom of riser 40, or when the foam is unable to apply sufficient hydrostatic
pressure even
when frangible membrane 46 is at the bottom, but hydrocarbons are still
present, indicating a
dangerous situation.

CA 02866005 2014-09-26
8
[0027] In the above examples, pressure-openable seal 46 is in the form of
a frangible
piece of material such as plastic or rubber that breaks under a certain amount
of pressure. In
other examples, pressure-responsive seal 46 may be a connection that releases
under a
predetermined pressure, such as shear pins. Alternatively, it may be a
connection that
involves a resilient lock that opens under pressure that can merely be reset
once opened.
Preferably, pressure-openable seal is a frangible connection as this is
generally less prone to
mechanical failure that may prevent it from opening when necessary.
[0028] As noted previously, the purpose of pressure-openable seal is to
prevent a build-
up of pressure within enclosure 12 or to prevent an overflow of liquid or foam
from enclosure
12. It may be particularly useful to manage the level of foam, as known
systems of measuring
levels in production tanks may be less likely to detect the presence of foam.
As any pressure
within enclosure 12 will be present in the gas layer 28, it will be
communicated along
pressure-relief riser 40 to pressure-responsive seal 46, which is open to
atmospheric pressure
on the other side. As the pressure differential becomes too great, seal 46
will open, either in
or out. In other situations, referring to FIG. 3, if oil layer 26 becomes too
high, it will
overflow into pressure-relief riser 40 and the column of fluid pressure will
eventually cause
seal 46 to open as shown, and fluid will be collected in enclosure 34.
Generally speaking,
however, this will be a rare occurrence, as production tanks will often be
equipped with level
sensors that prevent additional fluid from being pumped into the production
tank. In other
situations, referring to FIG. 4, a foam layer 30 may form on top of the liquid
in production
tank 10. Preferably, seal 46 is also designed to open under the pressure that
may be applied
by a sufficient amount of foam that may enter through pressure-relief riser
40. In some
embodiments, as shown, pressure relief riser 40 may have internal baffles 52
to help break the
foam or at least reduce the gas content in the foam. This will have the
benefit of increasing the
density of the fluid in riser 40 and therefore the pressure against seal 46.
[0029] In this patent document, the word "comprising" is used in its non-
limiting sense to
mean that items following the word are included, but items not specifically
mentioned are not
excluded. A reference to an element by the indefinite article "a" does not
exclude the

CA 02866005 2014-09-26
9
possibility that more than one of the elements is present, unless the context
clearly requires
that there be one and only one of the elements.
[0030] The scope of the following claims should not be limited by the
preferred
embodiments set forth in the examples above and in the drawings, but should be
given the
broadest interpretation consistent with the description as a whole.

Representative Drawing
A single figure which represents the drawing illustrating the invention.
Administrative Status

For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee  and Payment History  should be consulted.

Administrative Status

Title Date
Forecasted Issue Date 2015-06-23
(22) Filed 2014-09-26
Examination Requested 2014-10-31
(41) Open to Public Inspection 2015-01-26
(45) Issued 2015-06-23

Abandonment History

There is no abandonment history.

Maintenance Fee

Last Payment of $100.00 was received on 2023-08-28


 Upcoming maintenance fee amounts

Description Date Amount
Next Payment if standard fee 2024-09-26 $347.00
Next Payment if small entity fee 2024-09-26 $125.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee;
  • the late payment fee; or
  • additional fee to reverse deemed expiry.

Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
Please refer to the CIPO Patent Fees web page to see all current fee amounts.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Application Fee $200.00 2014-09-26
Request for Examination $400.00 2014-10-31
Final Fee $150.00 2015-04-10
Maintenance Fee - Patent - New Act 2 2016-09-26 $50.00 2016-06-29
Maintenance Fee - Patent - New Act 3 2017-09-26 $50.00 2017-08-01
Maintenance Fee - Patent - New Act 4 2018-09-26 $50.00 2018-07-31
Maintenance Fee - Patent - New Act 5 2019-09-26 $100.00 2019-09-18
Maintenance Fee - Patent - New Act 6 2020-09-28 $100.00 2020-09-23
Maintenance Fee - Patent - New Act 7 2021-09-27 $100.00 2021-09-23
Maintenance Fee - Patent - New Act 8 2022-09-26 $100.00 2022-09-23
Maintenance Fee - Patent - New Act 9 2023-09-26 $100.00 2023-08-28
Owners on Record

Note: Records showing the ownership history in alphabetical order.

Current Owners on Record
TRINITY HIGH - TECH PRODUCTS LTD.
Past Owners on Record
None
Past Owners that do not appear in the "Owners on Record" listing will appear in other documentation within the application.
Documents

To view selected files, please enter reCAPTCHA code :



To view images, click a link in the Document Description column. To download the documents, select one or more checkboxes in the first column and then click the "Download Selected in PDF format (Zip Archive)" or the "Download Selected as Single PDF" button.

List of published and non-published patent-specific documents on the CPD .

If you have any difficulty accessing content, you can call the Client Service Centre at 1-866-997-1936 or send them an e-mail at CIPO Client Service Centre.


Document
Description 
Date
(yyyy-mm-dd) 
Number of pages   Size of Image (KB) 
Abstract 2014-09-26 1 13
Description 2014-09-26 9 368
Claims 2014-09-26 3 74
Drawings 2014-09-26 5 76
Representative Drawing 2014-12-30 1 8
Cover Page 2015-02-03 1 34
Cover Page 2015-06-05 2 37
Assignment 2014-09-26 3 88
Correspondence 2014-10-31 3 69
Prosecution-Amendment 2014-10-31 4 96
Prosecution-Amendment 2015-01-28 1 26
Prosecution-Amendment 2015-03-11 1 59
Correspondence 2015-04-10 1 32