CN217191411U - Temporary pipe cleaning device for high-pressure natural gas pipeline - Google Patents
Temporary pipe cleaning device for high-pressure natural gas pipeline Download PDFInfo
- Publication number
- CN217191411U CN217191411U CN202221014882.3U CN202221014882U CN217191411U CN 217191411 U CN217191411 U CN 217191411U CN 202221014882 U CN202221014882 U CN 202221014882U CN 217191411 U CN217191411 U CN 217191411U
- Authority
- CN
- China
- Prior art keywords
- ball
- pipe
- pigging
- natural gas
- gas pipeline
- 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.)
- Active
Links
Images
Landscapes
- Pipeline Systems (AREA)
- Cleaning In General (AREA)
Abstract
The utility model discloses a temporary pigging device for a high-pressure natural gas pipeline, wherein a first isolation valve and a second isolation valve are respectively arranged at the upstream and the downstream of the high-pressure natural gas pipeline, a ball service facility pipe is connected at the downstream of the first isolation valve of the high-pressure natural gas pipeline in a first valve well, and a third isolation valve is arranged on the ball service facility pipe; a ball receiving facility pipe is connected to the upper stream of the second isolation valve of the high-pressure natural gas pipeline in the second valve well, and a fourth isolation valve is arranged on the ball receiving facility pipe; the ball cleaning and delivering device is detachably connected with the third isolating valve when the ball cleaning and delivering device is used for cleaning the high-pressure natural gas pipeline; when the ball collecting device is used for cleaning the high-pressure natural gas pipeline, the pipe cleaning and ball collecting pipe is detachably connected with the fourth isolating valve. The utility model provides a nervous problem of city land, can fully carry out the dredging pipe operation to high-pressure natural gas line, ensured high-pressure natural gas line's safety.
Description
Technical Field
The utility model relates to a natural gas line technical field especially relates to an interim dredging pipe device of high-pressure natural gas line.
Background
According to the standard requirements of TSG D7004-2010 pressure pipeline regular inspection rule-public pipeline and TSG D7003-2010 pressure pipeline regular inspection rule-long transportation (oil and gas) pipeline, annual inspection, comprehensive inspection and use-conforming evaluation are required to be carried out on the in-service high-pressure gas pipeline, and the comprehensive inspection method comprises internal inspection. In addition, according to the requirement of pipeline integrity management, the internal detection feasibility of the high-pressure gas pipeline is considered in the construction period, and the internal detection can be implemented after the high-pressure gas pipeline is put into operation. Therefore, the high-pressure gas pipeline is designed by considering internal detection, generally, a pipeline ball launching facility is built at the upstream of the pipeline, a pipeline cleaning and ball collecting facility is built at the downstream of the pipeline, and online internal detection is carried out by using a pipe cleaner with in-band detection.
Along with the development of the urbanization process, the urban land is more and more tense, land use indexes are lacked upstream and downstream of a high-pressure pipeline, land acquisition is difficult, and the conditions for constructing a pigging ball collecting and dispatching facility are not met.
Accordingly, those skilled in the art have endeavored to provide a temporary pigging apparatus for a high pressure natural gas pipeline, which can perform temporary pigging operations on the natural gas pipeline using limited site conditions.
SUMMERY OF THE UTILITY MODEL
In view of the defects in the prior art, the technical problem to be solved in the utility model is how to provide a pigging device that can carry out interim pigging to natural gas line.
In order to achieve the above object, the utility model provides a high-pressure natural gas pipeline temporary pigging device for pigging high-pressure natural gas pipeline, the upper reaches and the lower reaches of high-pressure natural gas pipeline are equipped with first isolation valve, second isolation valve respectively, first isolation valve is established in first valve well, second isolation valve is established in second valve well, its characterized in that, the high-pressure natural gas pipeline in the first valve well is located the low reaches of first isolation valve and is connected with service facility pipe, be equipped with the third isolation valve on the service facility pipe; a ball receiving facility pipe is connected to the upper stream of the second isolation valve of the high-pressure natural gas pipeline in the second valve well, and a fourth isolation valve is arranged on the ball receiving facility pipe; the high-pressure natural gas pipeline pigging device comprises a pigging and ball-sending cylinder, a fifth isolation valve and a pigging and ball-sending pipe, wherein an outlet of the pigging and ball-sending cylinder is sequentially connected with the fifth isolation valve and the pigging and ball-sending pipe; receive the ball device including the spherical shell of pigging receive a ball section of thick bamboo, sixth isolating valve, pigging receive the bulb, the outlet that the spherical shell was received to the pigging in proper order with the sixth isolating valve the spherical shell connection is received to the pigging, receive the ball device and be configured as right when the high pressure natural gas pipeline pigging the spherical shell is received to the pigging with fourth isolating valve detachably connects.
Furthermore, the outer diameters of the ball serving facility pipe, the pigging ball serving pipe, the ball receiving facility pipe and the pigging ball receiving pipe are not larger than the outer diameter of the high-pressure natural gas pipeline.
Preferably, the outer diameters of the ball serving facility pipe, the pigging ball serving pipe, the ball receiving facility pipe and the pigging ball receiving pipe are equal to the outer diameter of the high-pressure natural gas pipeline.
Preferably, the third and fourth isolation valves are flange-connected ball valves.
Preferably, the fifth and sixth isolation valves are welded-connection ball valves.
Furthermore, a ball serving prying port branch pipe connecting pipe is connected to the upper portion, located at the upstream of the first isolation valve, of the high-pressure natural gas pipeline in the first valve well, and a seventh isolation valve is arranged on the ball serving prying port branch pipe connecting pipe; the pigging service robot is characterized in that a service prying port branch pipe is connected to the pigging service barrel, a ninth isolation valve is arranged on the service prying port branch pipe, and the service prying port branch pipe is configured to be detachably connected with the seventh isolation valve.
Furthermore, a ball receiving prying port branch pipe connecting pipe is connected to the downstream of the second isolation valve of the high-pressure natural gas pipeline of the second valve well, and an eighth isolation valve is arranged on the ball receiving prying port branch pipe connecting pipe; the ball collecting barrel is connected with a ball collecting pry port branch pipe, the ball collecting pry port branch pipe is provided with a tenth isolation valve, and the ball collecting pry port branch pipe is configured to be detachably connected with the eighth isolation valve.
Furthermore, serve a ball sled mouthful branch pipe connecting pipe serve a ball sled mouthful branch pipe receive a ball sled mouthful branch pipe connecting pipe receive a ball sled mouthful pipe diameter of branch pipe is less than high-pressure natural gas line.
Preferably, the seventh and eighth isolation valves are flanged ball valves.
Furthermore, the pigging and ball distributing cylinder and the pigging and ball collecting cylinder are respectively provided with a blow-off pipe and a blow-off pipe.
The utility model discloses following beneficial technological effect has at least:
the utility model provides an interim dredging pipe device of high-pressure natural gas line utilizes regional construction underground valve well such as urban green belt and interim dredging pipe facility, has effectively solved nervous problem of city land, has abundant time to carry out the operation of regularly dredging pipe to high-pressure natural gas line, has guaranteed the comprehensive implementation of dredging pipe operation, has ensured high-pressure natural gas line's safety.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a flow chart of the temporary serve facility of the present invention;
FIG. 2 is a flow chart of the temporary ball collecting facility of the present invention;
fig. 3 is a schematic plan view of the valve well of the present invention;
fig. 4 is a schematic view of the valve well in elevation of the present invention.
Wherein the content of the first and second substances,
10-a high-pressure natural gas pipeline, 11-a first isolation valve, 12-a second isolation valve;
20-a ball serving facility pipe, 21-a third isolation valve, 22-a pipe cleaning and ball serving barrel, 23-a fifth isolation valve and 24-a pipe cleaning and ball serving pipe;
30-ball collecting facility pipe, 31-fourth isolating valve, 32-pigging ball collecting barrel, 33-sixth isolating valve and 34-pigging ball collecting pipe;
40-serve pry port branch pipe connecting pipe, 41-seventh isolating valve, 42-ninth isolating valve and 43-serve pry port branch pipe;
50-ball collecting pry port branch pipe connecting pipe, 51-eighth isolating valve, 52-tenth isolating valve and 53-ball collecting pry port branch pipe;
60-diffusing pipe.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
The utility model provides an interim dredging pipe device of high-pressure natural gas line for the periodic dredging pipe inspection to high-pressure natural gas line.
As shown in fig. 1 and fig. 2, in the temporary pipe cleaning device for high-pressure natural gas pipeline of the embodiment, the high-pressure natural gas pipeline 10 is buried underground after leaving the station, and a first valve well and a second valve well are respectively arranged at the upstream and the downstream of the high-pressure natural gas pipeline 10. In the upstream first valve well, a first isolation valve 11 is arranged on a high-pressure natural gas pipeline 10; downstream of the first isolation valve 11, a branch pipe, i.e., a service pipe 20 is connected to the high-pressure natural gas pipe 10, and a third isolation valve 21 is connected to an end of the service pipe 20. In the downstream second valve well, a second isolation valve 12 is arranged on the high-pressure natural gas pipeline 10; a branch pipe, i.e., a ball receiving facility pipe 30 is connected to the high-pressure natural gas pipe 10 upstream of the second isolation valve 12, and a fourth isolation valve 31 is connected to an end of the ball receiving facility pipe 30.
The first valve well and the second valve well are arranged according to municipal planning land, and can be arranged in a green belt generally. In the first valve well and the second valve well, the ball serving facility pipe 20 and the third isolation valve 21, and the ball receiving facility pipe 30 and the fourth isolation valve 31 are permanently arranged, and are connected with an external pigging pipeline when the high-pressure natural gas pipeline 10 is pigged. For ease of connection, the third isolation valve 21 and the fourth isolation valve 31 are flanged ball valves. In order to ensure safety, a ball valve is welded between the third isolation valve 21 and the high-pressure natural gas pipeline 10, and a ball valve is welded between the fourth isolation valve 31 and the high-pressure natural gas pipeline.
As shown in fig. 1, the pigging device of the present embodiment further includes a ball serving device, the ball serving device includes a pigging ball serving barrel 22, a fifth isolation valve 23 and a pigging ball serving pipe 24, an outlet of the pigging ball serving barrel 22 is sequentially connected with the fifth isolation valve 23 and the pigging ball serving pipe 24, and the other end of the pigging ball serving pipe 24 is connected with the third isolation valve 21 during pigging operation.
As shown in fig. 2, the pigging device of the present embodiment further includes a ball collecting device, the ball collecting device includes a pigging ball collecting barrel 32, a sixth isolation valve 33, and a pigging ball collecting pipe 34, an outlet of the pigging ball collecting barrel 32 is sequentially connected to the sixth isolation valve 33 and the pigging ball collecting pipe 34, and the other end of the pigging ball collecting pipe 34 is connected to the fourth isolation valve 31 during pigging operation.
The fifth isolation valve 23 and the sixth isolation valve 33 are all ball valves connected by welding, and in order to ensure safety, a ball valve connected by welding is respectively arranged on the pigging and ball-sending pipe 24 and the pigging and ball-receiving pipe 34.
The pigging and ball dispensing tube 22 and the pigging and ball collecting tube 32 have the same structure, and are divided into a ball dispensing tube and a ball collecting tube according to their use positions. The pigging and ball dispensing tube 22 and the pigging and ball receiving tube 32 are provided with pressure indicators and position indicators for indicating the pressure in the tubes and whether a pig passes through. The pig in the pigging barrel 22 can be pushed out under the action of the pressure difference and moves in the pipeline to pigge the pipeline.
In this embodiment, the diameters of the ball serving pipe 20, the ball cleaning and serving pipe 24, the ball collecting pipe 30, and the ball cleaning and collecting pipe 34 are the same as the diameter of the high-pressure natural gas pipeline 10.
In some embodiments, a service prying port branch pipe connecting pipe 40 is further connected to the high-pressure natural gas pipeline 10 upstream of the first isolation valve 11 in the first valve well, and a seventh isolation valve 41 is arranged on the service prying port branch pipe connecting pipe 40. A ball serving pry port branch pipe 43 is further arranged on the pigging ball serving barrel 22, and a ninth isolation valve 42 is arranged on the ball serving pry port branch pipe 43. The seventh isolation valve 41 is a flanged ball valve, and the service pry port branch 43 can be connected with the seventh isolation valve 41. During the pipe cleaning and ball serving operation, the first isolation valve 11 is closed, the seventh isolation valve 41 and the ninth isolation valve 42 are opened, and the pipeline cleaning device in the pipe cleaning and ball serving device is pushed out by using the upstream natural gas pressure. In the second valve well, the high-pressure natural gas pipeline 10 is further connected with a ball collecting prying port branch pipe connecting pipe 50 at the downstream of the second isolation valve 12, and an eighth isolation valve 51 is arranged on the ball collecting prying port branch pipe connecting pipe 50. A ball collecting pry port branch pipe 53 is further arranged on the pigging ball collecting barrel 32, and a tenth isolation valve 52 is arranged on the ball collecting pry port branch pipe 53. The eighth isolation valve 51 is a flange-connected ball valve, and the ball-collecting pry-port branch pipe 53 can be connected with the eighth isolation valve 51. During the pipe cleaning and ball collecting operation, the second isolation valve 12 is closed, the eighth isolation valve 51 and the tenth isolation valve 52 are opened, and the upstream natural gas enters the downstream through the pipe cleaning and ball collecting pry and the ball collecting pry port branch pipe connecting pipe 50.
The pipe diameters of the ball serving prying port branch pipe connecting pipe 40, the ball serving prying port branch pipe 43, the ball receiving prying port branch pipe connecting pipe 50 and the ball receiving prying port branch pipe 53 are smaller than the pipe diameter of the high-pressure natural gas pipeline 10, and a ball valve in welded connection is further arranged between the seventh isolating valve 41, the eighth isolating valve 51 and the high-pressure natural gas pipeline 10 respectively.
As shown in fig. 1 and 2, the pigging and pilling out tube 22 and the pigging and pilling out tube 24 are provided with the diffusing pipe 60, and the pigging and pilling out tube 22 is provided with a sewage discharge pipe; the pigging ball collecting barrel 32 and the pigging ball collecting pipe 34 are also provided with a diffusing pipe 60, and the pigging ball collecting barrel 32 is also provided with a sewage discharge pipe. The diffusing pipe 60 is also provided with a safety release valve, and the maintenance and the safety protection of the ball serving device and the ball collecting device are realized through the diffusing pipe 60 and the sewage discharge pipe.
The serve device is centralized on the temporary serve pry, and a pipeline interface is reserved between the serve device and the outside; the ball collecting device is concentrated on the temporary ball collecting pry, and a pipeline interface is reserved between the ball collecting device and the outside. When the pigging operation is carried out to needs, will send the ball sled temporarily and remove near first valve well, will receive the ball sled temporarily and remove near second valve well, can carry out the pigging operation.
Fig. 3 and 4 are schematic views of the piping and valve arrangement within the first and second valve wells. In order to ensure safety, combustible gas leakage detection probes are respectively arranged in the first valve well and the second valve well, and cameras are arranged near the valve wells for monitoring. And a combustible gas alarm, a video monitoring system, a power supply system and RTU equipment are respectively arranged near the upstream and downstream valve wells.
The interim dredging pipe device of high-pressure natural gas line of this embodiment is when the dredging pipe, will send the ball sled temporarily and receive the ball sled temporarily and transport to near first valve well and second valve well and fix, utilize interim pipeline to be connected with the valve in first valve well and the second valve well respectively. The pig is placed into the pigging barrel 22, after the specified standard operating procedure is performed, the main valve is closed, the branch valve connected to the pigging barrel 22 is opened, and the pig is pushed out by differential pressure into the downstream pipeline. When the pipe cleaner passes through the position indicator, the main valve is opened, the sending valve and the branch valves are closed, the normal production flow is recovered, and the pressure is released for the pipe cleaning and ball sending cylinder 22.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A temporary pigging device for a high-pressure natural gas pipeline is used for pigging the high-pressure natural gas pipeline, wherein a first isolation valve and a second isolation valve are respectively arranged at the upstream and the downstream of the high-pressure natural gas pipeline, the first isolation valve is arranged in a first valve well, and the second isolation valve is arranged in a second valve well; a ball receiving facility pipe is connected to the upper stream of the second isolation valve of the high-pressure natural gas pipeline in the second valve well, and a fourth isolation valve is arranged on the ball receiving facility pipe; the high-pressure natural gas pipeline pigging device comprises a pigging and ball-sending cylinder, a fifth isolation valve and a pigging and ball-sending pipe, wherein an outlet of the pigging and ball-sending cylinder is sequentially connected with the fifth isolation valve and the pigging and ball-sending pipe; receive the ball device including the spherical shell of pigging receive a ball section of thick bamboo, sixth isolating valve, pigging receive the bulb, the outlet that the spherical shell was received to the pigging in proper order with the sixth isolating valve the spherical shell connection is received to the pigging, receive the ball device and be configured as right when the high pressure natural gas pipeline pigging the spherical shell is received to the pigging with fourth isolating valve detachably connects.
2. A temporary pigging device for a high pressure natural gas pipeline according to claim 1, wherein the outer diameter of the ball serving pipe, the ball cleaning and serving pipe, the ball collecting pipe and the ball cleaning and collecting pipe is not greater than the outer diameter of the high pressure natural gas pipeline.
3. A temporary pigging device for a high pressure natural gas pipeline according to claim 2, wherein the outer diameter of the ball dispenser pipe, the pigging ball dispenser pipe, the ball collector pipe and the pigging ball collector pipe is equal to the outer diameter of the high pressure natural gas pipeline.
4. A temporary pig of a high pressure natural gas pipeline as claimed in claim 1, wherein said third and fourth isolation valves are flanged ball valves.
5. A temporary pig of a high pressure natural gas pipeline as claimed in claim 4, wherein said fifth and sixth isolation valves are welded connection ball valves.
6. The temporary pigging device for the high-pressure natural gas pipeline according to claim 1, wherein a ball serving pry port branch pipe connecting pipe is connected to the high-pressure natural gas pipeline in the first valve well upstream of the first isolation valve, and a seventh isolation valve is arranged on the ball serving pry port branch pipe connecting pipe; the pigging service robot is characterized in that a service prying port branch pipe is connected to the pigging service barrel, a ninth isolation valve is arranged on the service prying port branch pipe, and the service prying port branch pipe is configured to be detachably connected with the seventh isolation valve.
7. The temporary pigging device for the high-pressure natural gas pipeline according to claim 6, wherein a ball receiving prying port branch pipe connecting pipe is connected to the high-pressure natural gas pipeline of the second valve well downstream of the second isolation valve, and an eighth isolation valve is arranged on the ball receiving prying port branch pipe connecting pipe; the ball collecting barrel is connected with a ball collecting pry port branch pipe, the ball collecting pry port branch pipe is provided with a tenth isolation valve, and the ball collecting pry port branch pipe is configured to be detachably connected with the eighth isolation valve.
8. The temporary pigging device for the high-pressure natural gas pipeline according to claim 7, wherein the pipe diameters of the ball serving pry port branch pipe connecting pipe, the ball serving pry port branch pipe, the ball receiving pry port branch pipe connecting pipe and the ball receiving pry port branch pipe are smaller than those of the high-pressure natural gas pipeline.
9. A temporary pig of a high pressure natural gas pipeline as claimed in claim 7, wherein said seventh isolation valve and said eighth isolation valve are flanged ball valves.
10. A temporary pigging device for a high-pressure natural gas pipeline according to claim 1, wherein the pigging and ball-discharging barrel and the pigging and ball-collecting barrel are respectively provided with a blow-off pipe and a blow-off pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221014882.3U CN217191411U (en) | 2022-04-28 | 2022-04-28 | Temporary pipe cleaning device for high-pressure natural gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221014882.3U CN217191411U (en) | 2022-04-28 | 2022-04-28 | Temporary pipe cleaning device for high-pressure natural gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217191411U true CN217191411U (en) | 2022-08-16 |
Family
ID=82776748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221014882.3U Active CN217191411U (en) | 2022-04-28 | 2022-04-28 | Temporary pipe cleaning device for high-pressure natural gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217191411U (en) |
-
2022
- 2022-04-28 CN CN202221014882.3U patent/CN217191411U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103915124B (en) | Nuclear power station conventional island demineralized water distribution system full cut-off repair method | |
| CN104307821A (en) | Pollution-free, high-efficiency and long-distance pipe installing and cleaning system | |
| CN108167655A (en) | A kind of comprehensive monitoring analysis of natural gas transmission pipeline, emergent treatment system and its operation method | |
| CN217191411U (en) | Temporary pipe cleaning device for high-pressure natural gas pipeline | |
| CN203433733U (en) | Simulation apparatus for chemical disaster accident | |
| CN113413930A (en) | Long-distance conveying method and system for condensate fine-processing resin | |
| CN116642132A (en) | Natural gas emptying and recycling system and recycling method for gas transmission station | |
| CN114769243A (en) | Temporary pipe cleaning device for high-pressure natural gas pipeline | |
| CN208847417U (en) | A kind of portable pipe package seal checker | |
| CN111451225B (en) | Pipeline cleaning operation method for long-distance pipeline | |
| CN110882975A (en) | Method for cleaning pipeline before production stop, inspection and maintenance of high-sulfur-content station | |
| CN207213499U (en) | A kind of self-fastening sealing structure that can open soon of pipe cleaning valve | |
| CN114769243B (en) | Temporary pipe cleaning device for high-pressure natural gas pipeline | |
| CN203348825U (en) | Non-excavating lining repairing and renovating device for pipeline | |
| CN211118784U (en) | EHS (electric fire alarm system) for urban gas pigging receiving and dispatching balls | |
| CN205824490U (en) | A kind of combined type sea bottom pipeline transmitting-receiving ball device | |
| CN212467601U (en) | Gas and oil mist separation equipment for emergency control system of airplane | |
| CN210530814U (en) | Skid-mounted horizontal anti-sulfur three-phase separator | |
| CN202165796U (en) | Rapid nitrogen blowing device of oxygen spherical tank | |
| CN214094007U (en) | Liquefied hydrocarbon blowdown system | |
| CN211875697U (en) | Device for reducing risk of falling blind plate | |
| CN211493820U (en) | Compressed gas long pipe trailer | |
| CN208074594U (en) | A kind of blowdown collection conveying device | |
| CN210398404U (en) | Automatic recovery unit of high pressure unloading | |
| CN207036569U (en) | A kind of pipe-line system gas pressure test system of petrochemical industry station project |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200135 no.887 Gushan Road, Pudong New Area, Shanghai Patentee after: Shanghai Energy Construction Engineering Design and Research Co.,Ltd. Address before: 200135 no.887 Gushan Road, Pudong New Area, Shanghai Patentee before: SHANGHAI GAS ENGINEERING DESIGN & RESEARCH Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |