CA3001908A1 - Cabin lift locking mechanism - Google Patents
Cabin lift locking mechanism Download PDFInfo
- Publication number
- CA3001908A1 CA3001908A1 CA3001908A CA3001908A CA3001908A1 CA 3001908 A1 CA3001908 A1 CA 3001908A1 CA 3001908 A CA3001908 A CA 3001908A CA 3001908 A CA3001908 A CA 3001908A CA 3001908 A1 CA3001908 A1 CA 3001908A1
- Authority
- CA
- Canada
- Prior art keywords
- unit
- cabin
- cylinder
- coiled tubing
- locking mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/042—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Actuator (AREA)
Abstract
A cabin unit mounted on a horizontal platform includes a mechanism for locking the cabin unit when in a raised position above the horizontal platform. The locking mechanism includes an articulated member attached between the cabin unit and the horizontal platform, the articulated member including an upper support arm and a lower support arm coupled at a joint and a cylinder attached between the horizontal support and the articulated member. A cylinder arm is retracted to move the joint of the articulated member to a locked position while the cabin is in a raised position.
Description
CABIN LIFT LOCKING MECHANISM
FIELD
[0001] Embodiments disclosed herein relate to a coiled tubing unit, more particularly, a cabin lift locking mechanism.
BACKGROUND AND SUMMARY
FIELD
[0001] Embodiments disclosed herein relate to a coiled tubing unit, more particularly, a cabin lift locking mechanism.
BACKGROUND AND SUMMARY
[0002] A coiled tubing unit dispenses coiled tubing into and out of a wellbore from a reel unit. The coiled tubing unit also includes a control center where an operator is located to operate the reel unit as coiled tubing is inserted into or taken out of the wellbore. In certain instances, the control center is a cabin unit mounted at or near a front end of the coiled tubing unit, e.g., a trailer, and the cabin unit is raised to provide the operator a "birds eye" view of the operations.
[0003] In one aspect, embodiments disclosed herein relate to a cabin unit mounted on a horizontal platform and a mechanism for locking the cabin unit in a raised position above the horizontal platform, the mechanism comprising an articulated member attached between the cabin unit and the horizontal platform, the articulated member including an upper support arm and a lower support arm coupled at a joint, and a cylinder attached between the horizontal support and the articulated member, wherein an arm of the cylinder is retracted to move the joint of the articulated member to a locked position while the cabin is in a raised position.
BRIEF DESCRIPTION OF THE DRAWINGS
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] The invention is illustrated in the accompanying drawings wherein,
[0005] Figure 1 illustrates a coiled tubing unit.
[0006] Figure 2A illustrates a perspective view of an embodiment of a cabin unit locking mechanism in a semi-collapsed position;
7 PCT/US2016/056246 [0007] Figure 2B illustrates a perspective view of an embodiment of a cabin unit locking mechanism in a locked position;
[0008] Figures 3A-C illustrate side views of multiple positions of a cabin unit locking mechanism.
DETAILED DESCRIPTION
DETAILED DESCRIPTION
[0009] A cabin unit locking mechanism is disclosed. The cabin unit locking mechanism may be on a coiled tubing unit, for example, as shown in Figure 1.
The coiled tubing unit may include a complete set of equipment necessary to perform standard continuous-length tubing operations in the field. For example, the coiled tubing unit may comprise a reel for storage and transport of coiled tubing, an injector head to provide surface drive force to run and retrieve coiled tubing, a control cabin from which an equipment operator may monitor and control the coiled tubing, and a power pack to generate hydraulic and pneumatic power required to operate the coiled tubing unit. The coiled tubing unit may further comprise other equipment for continuous-length or coiled tubing operations in the field. Moreover, in certain embodiments the coiled tubing unit may comprise onshore coiled tubing units such as a truck mounted coiled tubing unit or larger trailer mounted coiled tubing units. Still further, in other embodiments the coiled tubing unit may comprise offshore coiled tubing units such as those mounted on a lift boat, barge, offshore platform or any other offshore structure. The locking mechanism disclosed herein may be used with any lifting mechanism on any type of coiled tubing equipment that is or may be raised and lowered, including but not limited to, support trailers, offshore cabin skids, and pumping units.
The coiled tubing unit may include a complete set of equipment necessary to perform standard continuous-length tubing operations in the field. For example, the coiled tubing unit may comprise a reel for storage and transport of coiled tubing, an injector head to provide surface drive force to run and retrieve coiled tubing, a control cabin from which an equipment operator may monitor and control the coiled tubing, and a power pack to generate hydraulic and pneumatic power required to operate the coiled tubing unit. The coiled tubing unit may further comprise other equipment for continuous-length or coiled tubing operations in the field. Moreover, in certain embodiments the coiled tubing unit may comprise onshore coiled tubing units such as a truck mounted coiled tubing unit or larger trailer mounted coiled tubing units. Still further, in other embodiments the coiled tubing unit may comprise offshore coiled tubing units such as those mounted on a lift boat, barge, offshore platform or any other offshore structure. The locking mechanism disclosed herein may be used with any lifting mechanism on any type of coiled tubing equipment that is or may be raised and lowered, including but not limited to, support trailers, offshore cabin skids, and pumping units.
[0010] A cabin unit may be mounted on or above a horizontal platform mounted on a truck or trailer. The locking mechanism disclosed herein is associated with raising and lowering of the cabin unit relative to the horizontal platform with hydraulic cylinders for use or transport. In the event hydraulic cylinders are used to raise the cabin unit, the locking mechanism fully supports the weight of the cabin unit without the need for hydraulic pressure in the lifting cylinders. Thus, a loss of hydraulic power does not adversely affect the system.
100111 The locking mechanism includes an articulated member. The articulated member may have a joint coupling first and second arms of the member. For example, the joint may include a pin inserted through holes in the arms of the articulated member, or any other type of joint. The first arm may be connected to a pivot point (e.g., pinned or otherwise) on the cabin unit at an end opposite the joint. The second arm may be connected to a pivot point (e.g., pinned or otherwise) on the horizontal platform at an end opposite the joint.
100121 The locking mechanism further includes a cylinder having an extendable arm.
The cylinder may be attached between the horizontal platform and the articulated member.
For example, the cylinder may be attached at a pivot point (e.g., pinned or otherwise) of the horizontal platform and a pivot point (e.g., pinned or otherwise) on the second arm of the articulated member. Alternatively, the cylinder could be attached at a pivot point (not shown) on the first arm. In one embodiment, the cylinder may be a hydraulic cylinder in fluid communication at any pressure with a hydraulic fluid source. In other embodiments, the cylinder may be pneumatic or electric. In yet other embodiments, the cylinder may be mechanical. The locking mechanism may include one or more extendable cylinders and articulated members on each side of the cabin unit.
100131 Figures 2A-B illustrate perspective views of an embodiment of a cabin unit locking mechanism 100. A cabin unit 50 is mounted on or above a horizontal platform 101 or any commonly known weldment or structure by any means. The locking mechanism 100 includes an upper arm 102 and a lower arm 104 coupled together, and a cylinder 108 attached to at least one of the arms. A cabin lift system may include hydraulic cylinders 55 operable to raise and lower the cabin unit 50 relative to the horizontal platform 101.
During transport or at other times of nonuse, the cabin unit 50 is in the collapsed position resting on the horizontal platform 101. Prior to beginning the coiled tubing operations, the cabin unit is raised to provide the operator a "birds eye" view of the operations.
[0014] Figures 3A-D illustrate more detailed side views of an embodiment of the cabin unit locking mechanism 100 in Figures 2A-B. The locking mechanism 100 includes a first or upper support arm 102 and a second or lower support arm 104 coupled at a joint 106.
For example, the joint 106 may include a pin inserted through holes in the arms of the articulated member, or any other type of joint. The upper support arm 102 is connected to a pivot point 103 (e.g., pinned or otherwise) on the cabin unit at an end opposite the joint 106.
The lower support arm 104 is connected to a pivot point 105 (e.g., pinned or otherwise) on the horizontal platform 101 at an end opposite the joint 106.
[0015] The locking mechanism 100 further includes a cylinder 108 having an extendable arm 110. The cylinder 108 may be attached between the horizontal platform 101 and one of the upper arm 102 or the lower arm 104. For example, the cylinder 108 may be attached at a pivot point 111 (e.g., pinned or otherwise) of the horizontal platform 101 and a pivot point 109 (e.g., pinned or otherwise) on the lower arm 104.
Alternatively, the cylinder 108 could be attached at a pivot point (not shown) on the upper arm 102. In one embodiment, the cylinder 108 may be a pneumatic cylinder. In other embodiments, the cylinder 108 may be hydraulic or electric. In yet other embodiments, the cylinder 108 may be mechanical, e.g., a threaded extendable rod. The locking mechanism 100 may include one or more extendable cylinders and articulated members on each side of the cabin unit.
[0016] Figure 3A illustrates a fully collapsed position of the locking mechanism 100.
The cylinder arm 110 of the cylinder 108 is fully extended and the upper and lower arms 102, 104 are mechanically folded together in a compact manner. Figure 3B
illustrates a partially unfolded or extended position of the locking mechanism 100 as the cabin unit 50 is raised by the cylinders 55 (Figures 2A-B) of the cabin lift system. As the cabin unit 50 is raised, the upper and lower arms 102, 104 unfold, and the cylinder arm 110 of the cylinder 108 is retracted. The cylinder 108 may include an internal spring (not shown) that increases a pulling force on the joint 109 to unfold and extend upper and lower arms of the locking mechanism 100.
[0017] Figure 3C illustrates a fully unfolded, extended and locked position of the locking mechanism 100. When the cabin unit is fully raised, the cylinder arm 110 is fully retracted and pulls joint 106 between the upper and lower support arms 102, 104 past a centerline "C" formed along a length of the fully extended upper and lower arm supports. In the "over center" position, the upper support arm 102 mechanically engages an upper end 114 of the lower support arm 104. In the view shown in Figure 3C, the joint 106 is to the left of the centerline C in the locked, over center position. With the upper and lower support arms locked in place over center, the cabin unit rests on the locking mechanism joint rather than the hydraulic lift system used to raise the cabin unit.
[0018] To unlock the locking mechanism, the hydraulic cylinders 55 are actuated to raise the cabin unit slightly, and the cylinder arm 110 attached to the upper and lower support arms is extended slightly until the joint 106 of the locking mechanism passes the centerline "C" (in the direction of arrow "A" in Figure 3C) and the locking mechanism begins to mechanically fold. That is, in the view shown in Figure 3C, the joint 106 moves to the right of the centerline C. The operator then actuates the cabin lift system to lower the cabin unit.
[0019] Advantageously, embodiments disclosed herein provide a safe and efficient automatic locking mechanism to allow the cabin unit to be locked in place without relying on the methods or means that were used to raise the cabin. For example, in prior systems, the hydraulic lift system, that is hydraulic cylinders, used to raise the cabin unit also support the cabin unit while in the raised position. In the event of a hydraulic pressure loss, the hydraulic lift system would no longer support the cabin unit, and the cabin unit may fall. In another example of prior systems, the safety locks are rotating steel plates that have to be manually positioned after the cabin unit is raised. If the manual mechanical locks are forgotten and not moved into position then, in the event of a hydraulic pressure loss, the hydraulic lift system no longer supports the cabin unit, and the cabin unit may fall.
[0020] The claimed subject matter is not to be limited in scope by the specific embodiments described herein. Indeed, various modifications of the invention in addition to those described herein will become apparent to those skilled in the art from the foregoing description. Such modifications are intended to fall within the scope of the appended claims.
100111 The locking mechanism includes an articulated member. The articulated member may have a joint coupling first and second arms of the member. For example, the joint may include a pin inserted through holes in the arms of the articulated member, or any other type of joint. The first arm may be connected to a pivot point (e.g., pinned or otherwise) on the cabin unit at an end opposite the joint. The second arm may be connected to a pivot point (e.g., pinned or otherwise) on the horizontal platform at an end opposite the joint.
100121 The locking mechanism further includes a cylinder having an extendable arm.
The cylinder may be attached between the horizontal platform and the articulated member.
For example, the cylinder may be attached at a pivot point (e.g., pinned or otherwise) of the horizontal platform and a pivot point (e.g., pinned or otherwise) on the second arm of the articulated member. Alternatively, the cylinder could be attached at a pivot point (not shown) on the first arm. In one embodiment, the cylinder may be a hydraulic cylinder in fluid communication at any pressure with a hydraulic fluid source. In other embodiments, the cylinder may be pneumatic or electric. In yet other embodiments, the cylinder may be mechanical. The locking mechanism may include one or more extendable cylinders and articulated members on each side of the cabin unit.
100131 Figures 2A-B illustrate perspective views of an embodiment of a cabin unit locking mechanism 100. A cabin unit 50 is mounted on or above a horizontal platform 101 or any commonly known weldment or structure by any means. The locking mechanism 100 includes an upper arm 102 and a lower arm 104 coupled together, and a cylinder 108 attached to at least one of the arms. A cabin lift system may include hydraulic cylinders 55 operable to raise and lower the cabin unit 50 relative to the horizontal platform 101.
During transport or at other times of nonuse, the cabin unit 50 is in the collapsed position resting on the horizontal platform 101. Prior to beginning the coiled tubing operations, the cabin unit is raised to provide the operator a "birds eye" view of the operations.
[0014] Figures 3A-D illustrate more detailed side views of an embodiment of the cabin unit locking mechanism 100 in Figures 2A-B. The locking mechanism 100 includes a first or upper support arm 102 and a second or lower support arm 104 coupled at a joint 106.
For example, the joint 106 may include a pin inserted through holes in the arms of the articulated member, or any other type of joint. The upper support arm 102 is connected to a pivot point 103 (e.g., pinned or otherwise) on the cabin unit at an end opposite the joint 106.
The lower support arm 104 is connected to a pivot point 105 (e.g., pinned or otherwise) on the horizontal platform 101 at an end opposite the joint 106.
[0015] The locking mechanism 100 further includes a cylinder 108 having an extendable arm 110. The cylinder 108 may be attached between the horizontal platform 101 and one of the upper arm 102 or the lower arm 104. For example, the cylinder 108 may be attached at a pivot point 111 (e.g., pinned or otherwise) of the horizontal platform 101 and a pivot point 109 (e.g., pinned or otherwise) on the lower arm 104.
Alternatively, the cylinder 108 could be attached at a pivot point (not shown) on the upper arm 102. In one embodiment, the cylinder 108 may be a pneumatic cylinder. In other embodiments, the cylinder 108 may be hydraulic or electric. In yet other embodiments, the cylinder 108 may be mechanical, e.g., a threaded extendable rod. The locking mechanism 100 may include one or more extendable cylinders and articulated members on each side of the cabin unit.
[0016] Figure 3A illustrates a fully collapsed position of the locking mechanism 100.
The cylinder arm 110 of the cylinder 108 is fully extended and the upper and lower arms 102, 104 are mechanically folded together in a compact manner. Figure 3B
illustrates a partially unfolded or extended position of the locking mechanism 100 as the cabin unit 50 is raised by the cylinders 55 (Figures 2A-B) of the cabin lift system. As the cabin unit 50 is raised, the upper and lower arms 102, 104 unfold, and the cylinder arm 110 of the cylinder 108 is retracted. The cylinder 108 may include an internal spring (not shown) that increases a pulling force on the joint 109 to unfold and extend upper and lower arms of the locking mechanism 100.
[0017] Figure 3C illustrates a fully unfolded, extended and locked position of the locking mechanism 100. When the cabin unit is fully raised, the cylinder arm 110 is fully retracted and pulls joint 106 between the upper and lower support arms 102, 104 past a centerline "C" formed along a length of the fully extended upper and lower arm supports. In the "over center" position, the upper support arm 102 mechanically engages an upper end 114 of the lower support arm 104. In the view shown in Figure 3C, the joint 106 is to the left of the centerline C in the locked, over center position. With the upper and lower support arms locked in place over center, the cabin unit rests on the locking mechanism joint rather than the hydraulic lift system used to raise the cabin unit.
[0018] To unlock the locking mechanism, the hydraulic cylinders 55 are actuated to raise the cabin unit slightly, and the cylinder arm 110 attached to the upper and lower support arms is extended slightly until the joint 106 of the locking mechanism passes the centerline "C" (in the direction of arrow "A" in Figure 3C) and the locking mechanism begins to mechanically fold. That is, in the view shown in Figure 3C, the joint 106 moves to the right of the centerline C. The operator then actuates the cabin lift system to lower the cabin unit.
[0019] Advantageously, embodiments disclosed herein provide a safe and efficient automatic locking mechanism to allow the cabin unit to be locked in place without relying on the methods or means that were used to raise the cabin. For example, in prior systems, the hydraulic lift system, that is hydraulic cylinders, used to raise the cabin unit also support the cabin unit while in the raised position. In the event of a hydraulic pressure loss, the hydraulic lift system would no longer support the cabin unit, and the cabin unit may fall. In another example of prior systems, the safety locks are rotating steel plates that have to be manually positioned after the cabin unit is raised. If the manual mechanical locks are forgotten and not moved into position then, in the event of a hydraulic pressure loss, the hydraulic lift system no longer supports the cabin unit, and the cabin unit may fall.
[0020] The claimed subject matter is not to be limited in scope by the specific embodiments described herein. Indeed, various modifications of the invention in addition to those described herein will become apparent to those skilled in the art from the foregoing description. Such modifications are intended to fall within the scope of the appended claims.
Claims (5)
1. A coiled tubing unit comprising:
a cabin unit capable of being raised or lowered by a first mechanism relative to a horizontal platform of the coiled tubing unit; and a second mechanism for locking the cabin unit in a raised position above the horizontal platform, wherein the second mechanism is operable independent of the first mechanism, the second mechanism comprising:
an articulated member attached between the cabin unit and the horizontal platform, the articulated member including an upper support arm and a lower support arm coupled at a joint;
and a cylinder attached between the horizontal support and the articulated member, wherein an arm of the cylinder is retracted to move the joint of the articulated member to a locked position while the cabin unit is in a raised position.
a cabin unit capable of being raised or lowered by a first mechanism relative to a horizontal platform of the coiled tubing unit; and a second mechanism for locking the cabin unit in a raised position above the horizontal platform, wherein the second mechanism is operable independent of the first mechanism, the second mechanism comprising:
an articulated member attached between the cabin unit and the horizontal platform, the articulated member including an upper support arm and a lower support arm coupled at a joint;
and a cylinder attached between the horizontal support and the articulated member, wherein an arm of the cylinder is retracted to move the joint of the articulated member to a locked position while the cabin unit is in a raised position.
2. The coiled tubing unit of claim 1, wherein the cylinder of the second mechanism is pneumatic.
3. The coiled tubing unit of claim 1, wherein the cylinder of the second mechanism is mechanical.
4. The coiled tubing unit of claim 1, wherein the cylinder of the second mechanism is hydraulic.
5. The coiled tubing unit of claim 1, wherein the first mechanism comprises hydraulic cylinders operable to raise and lower the cabin unit relative to the horizontal platform.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/881,735 | 2015-10-13 | ||
| US14/881,735 US9573633B2 (en) | 2014-08-08 | 2015-10-13 | Cabin lift locking mechanism |
| PCT/US2016/056246 WO2017066117A1 (en) | 2015-10-13 | 2016-10-10 | Cabin lift locking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3001908A1 true CA3001908A1 (en) | 2017-04-20 |
Family
ID=58517830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3001908A Abandoned CA3001908A1 (en) | 2015-10-13 | 2016-10-10 | Cabin lift locking mechanism |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3362616B1 (en) |
| CA (1) | CA3001908A1 (en) |
| WO (1) | WO2017066117A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3799364A (en) * | 1973-01-05 | 1974-03-26 | Borg Warner | Automatic racker board finger pivot system |
| RU2067153C1 (en) | 1994-09-29 | 1996-09-27 | Акционерное общество закрытого типа "Русское акционерное общество "ТЮБТЕХ" | Hoisting plant for servicing oil and gas wells |
| US5881414A (en) * | 1996-11-27 | 1999-03-16 | United Dominion Ind., Inc. | Loading dock with adjustable bumpers |
| CA2466386C (en) | 2003-05-05 | 2008-02-12 | Varco I/P, Inc. | Elevating operator cabin for coiled tubing injector |
| CA2585274C (en) * | 2007-04-10 | 2011-07-19 | Stanley J. Boyko | Rotary mower over-center self-locking wing lift |
| CA2592494A1 (en) * | 2007-06-12 | 2008-12-12 | Alden Heppner | Elevated observatory |
| US8250816B2 (en) * | 2008-02-29 | 2012-08-28 | National Oilwell Varco L.P. | Drilling rig structure installation and methods |
| JP5327473B2 (en) * | 2009-10-21 | 2013-10-30 | 株式会社ダイフク | Work lifting support device |
| CA2854028C (en) * | 2010-12-30 | 2019-04-30 | T&T Engineering Services, Inc. | Fast transportable drilling rig system |
-
2016
- 2016-10-10 CA CA3001908A patent/CA3001908A1/en not_active Abandoned
- 2016-10-10 WO PCT/US2016/056246 patent/WO2017066117A1/en active Application Filing
- 2016-10-10 EP EP16856000.1A patent/EP3362616B1/en not_active Withdrawn - After Issue
Also Published As
| Publication number | Publication date |
|---|---|
| EP3362616A4 (en) | 2019-06-19 |
| EP3362616B1 (en) | 2020-07-01 |
| EP3362616A1 (en) | 2018-08-22 |
| WO2017066117A1 (en) | 2017-04-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20211012 |
|
| FZDE | Discontinued |
Effective date: 20220413 |
|
| FZDE | Discontinued |
Effective date: 20220413 |
|
| FZDC | Discontinued application reinstated |
Effective date: 20230621 |
|
| FZDC | Discontinued application reinstated |
Effective date: 20230621 |
|
| FZDC | Discontinued application reinstated |
Effective date: 20230621 |
|
| FZDC | Discontinued application reinstated |
Effective date: 20230621 |
|
| FZDE | Discontinued |
Effective date: 20240415 |