CA2516575A1 - Method and apparatus for pushing a dual diameter pig into a pipeline - Google Patents
Method and apparatus for pushing a dual diameter pig into a pipeline Download PDFInfo
- Publication number
- CA2516575A1 CA2516575A1 CA 2516575 CA2516575A CA2516575A1 CA 2516575 A1 CA2516575 A1 CA 2516575A1 CA 2516575 CA2516575 CA 2516575 CA 2516575 A CA2516575 A CA 2516575A CA 2516575 A1 CA2516575 A1 CA 2516575A1
- Authority
- CA
- Canada
- Prior art keywords
- frame
- pig
- actuator
- cross
- lock
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/46—Launching or retrieval of pigs or moles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
An apparatus for pushing a dual diameter pig through a conical reducer attached to a pig trap and into a pipeline includes a frame configured such that the pig rests and moves forward on the frame, which has a front end adapted for attachment to the trap. The vertical position of the frame can be adjusted to align the pig with the conical reducer.
An actuator is supported on the frame rearward of, and aligned with, the pig and an actuator control extends the actuator into contact with the rear end of a pig, and also retracts the actuator. The actuator locks to the frame at lock locations spaced along the frame, and the lock locations are separated by a distance that is less than a stroke of the actuator. The pig is pushed into the trap in steps by repeatedly extending, retracting, and moving the actuator forward.
An actuator is supported on the frame rearward of, and aligned with, the pig and an actuator control extends the actuator into contact with the rear end of a pig, and also retracts the actuator. The actuator locks to the frame at lock locations spaced along the frame, and the lock locations are separated by a distance that is less than a stroke of the actuator. The pig is pushed into the trap in steps by repeatedly extending, retracting, and moving the actuator forward.
Claims (25)
1. An apparatus for pushing a dual diameter pig through a conical reducer attached to a pig trap and into a pipeline, the apparatus comprising:
a frame configured to support a pig longitudinally such that the pig can move forward along the frame, and having a front end adapted for attachment to the pig trap;
at least one leg supporting the flame such that a vertical position of the frame can be adjusted to align a front end of a pig supported on the frame with an open end of the conical reducer;
an extendable actuator supported on the frame such that the actuator is rearward of, and substantially aligned with, a pig supported on the frame; and an actuator control operative to extend the actuator such that a front end thereof moves forward with respect to the frame and into contact with a central portion of a rear end of a pig supported on the frame, and operative to retract the actuator;
a lock operative to selectively lock the actuator to the frame at a plurality of lock locations between the front end of the frame and the rear end thereof, and wherein the lock locations are separated by a distance that is less than a stroke of the actuator.
a frame configured to support a pig longitudinally such that the pig can move forward along the frame, and having a front end adapted for attachment to the pig trap;
at least one leg supporting the flame such that a vertical position of the frame can be adjusted to align a front end of a pig supported on the frame with an open end of the conical reducer;
an extendable actuator supported on the frame such that the actuator is rearward of, and substantially aligned with, a pig supported on the frame; and an actuator control operative to extend the actuator such that a front end thereof moves forward with respect to the frame and into contact with a central portion of a rear end of a pig supported on the frame, and operative to retract the actuator;
a lock operative to selectively lock the actuator to the frame at a plurality of lock locations between the front end of the frame and the rear end thereof, and wherein the lock locations are separated by a distance that is less than a stroke of the actuator.
2. The apparatus of Claim 1 wherein the extendable actuator is attached to a cross-member extending from one side of the frame to the opposite side of the frame, and wherein the lock is operative to lock right and left ends of the cross-member to corresponding right and left side of the frame.
3. The apparatus of Claim 2 wherein the extendable actuator is attached to the cross-member at a location substantially aligned with an axis of the conical reducer.
4. The apparatus of Claim 3 wherein the frame comprises right and left side rails extending substantially from the front end of the frame to a rear end of the frame, and oriented substantially parallel to, and equidistant from, the axis of the conical reducer when the frame is attached to the pig trap.
5. The apparatus of Claim 4 wherein a pig is supported on the frame between the side rails such that a central axis of the pig is substantially aligned with the axis of the conical reducer.
6. The apparatus of any one of Claims 4 and 5 wherein the right and left ends of the cross-member are movable along the corresponding right and left side rails.
7. The apparatus of Claim 6 wherein the right and left ends of the cross-member engage grooves along the corresponding right and left side rails.
8. The apparatus of any one of Claims 6 and 7 further comprising a drive operative to move the right and left ends of the cross-member along the corresponding right and left side rails.
9. The apparatus of Claim 8 further comprising an operator platform attached to the cross-member such that an operator can occupy the platform and move along the side rails while manipulating the actuator control.
10. The apparatus of any one of Claims 4 - 9 wherein the lock locations are defined by rail apertures defined by the side rails, and wherein the lock comprises a pin passing through a pin aperture in an end of the cross-member and through a rail aperture that is aligned with the pin aperture when the cross-member is at a lock location.
11. The apparatus of any one of Claims 4 - 10 wherein the frame comprises a trough configured to support a pig longitudinally between the side rails.
12. The apparatus of any one of Claims 1 - 11 wherein the front end of the frame is attached to the pig trap by attachment to the conical reducer.
13. The apparatus of Claim 12 further comprising a conical reducer attached to the front end of the frame.
14. The apparatus of any one of Claims 1 - 13 wherein the extendable actuator comprises a hydraulic cylinder connected to a hydraulic power supply by hoses of a length sufficient to allow the hydraulic power supply to be located at a sufficient distance from the pig trap to reduce a fire hazard presented by operating the power supply in proximity to petroleum fumes from the pig trap.
15. A method for pushing a dual diameter pig through a conical reducer attached to a pig trap and into a pipeline, the method comprising:
attaching a front end of a frame to the pig trap and supporting a pig longitudinally on the frame such that the pig can move forward along the frame;
supporting the frame on at least one leg and adjusting a vertical position of the frame to substantially align a front end of the pig with an open end of the conical reducer, supporting an extendable actuator on the frame such that the actuator is rearward of, and substantially aligned with, the pig and locking the actuator to the frame at a first lock location;
extending the actuator such that a front end thereof moves forward with respect to the frame and into contact with a central portion of a rear end of the pig, and pushes the pig partially into the conical reducer;
retracting the actuator and unlocking the actuator from the frame;
moving the actuator forward to a second lock location where the front end thereof is in proximity to the rear end of the pig and locking the actuator;
extending the actuator and thereby pushing the pig farther into the conical reducer; and repeatedly retracting the actuator and unlocking the actuator from the frame, moving the actuator forward to further forward lock locations and locking the actuator to the frame, and extending the actuator, until the pig is located in the pig trap.
attaching a front end of a frame to the pig trap and supporting a pig longitudinally on the frame such that the pig can move forward along the frame;
supporting the frame on at least one leg and adjusting a vertical position of the frame to substantially align a front end of the pig with an open end of the conical reducer, supporting an extendable actuator on the frame such that the actuator is rearward of, and substantially aligned with, the pig and locking the actuator to the frame at a first lock location;
extending the actuator such that a front end thereof moves forward with respect to the frame and into contact with a central portion of a rear end of the pig, and pushes the pig partially into the conical reducer;
retracting the actuator and unlocking the actuator from the frame;
moving the actuator forward to a second lock location where the front end thereof is in proximity to the rear end of the pig and locking the actuator;
extending the actuator and thereby pushing the pig farther into the conical reducer; and repeatedly retracting the actuator and unlocking the actuator from the frame, moving the actuator forward to further forward lock locations and locking the actuator to the frame, and extending the actuator, until the pig is located in the pig trap.
16. The method of Claim 15 wherein the extendable actuator is attached to a cross-member extending from one side of the frame to the opposite side of the frame, and wherein the actuator is locked by locking right and left ends of the cross-member to corresponding right and left side of the frame.
17. The method of Claim 16 wherein the extendable actuator is attached to the cross-member at a location substantially aligned with an axis of the conical reducer.
18. The method of Claim 17 wherein the frame comprises right and left side rails extending substantially from the front end of the frame to a rear end of the frame, and oriented substantially parallel to, and equidistant from, the axis of the conical reducer,
19. The method of Claim 20 wherein the pig is supported on the frame between the side rails such that a central axis of the pig is substantially aligned with the axis of the conical reducer.
20. The method of any one of Claims 18 and 19 wherein the right and left ends of the cross-member are movable along the corresponding right and left side rails.
21. The method of Claim 20 wherein the right and left ends of the cross-member engage grooves along the corresponding right and left side rails.
22. The method of any one of Claims 18 - 21 wherein the lock locations are defined by rail apertures defined by the side rails, and wherein the cross-member is locked by aligning a pin aperture in an end of the cross-member with a rail aperture with the cross-member at a lock location, and inserting a pin through the pin aperture and aligned rail aperture.
23. The method of any one of Claims 18 - 22 wherein the frame comprises a trough and the pig is supported on the trough between the side rails.
24. The method of any one of Claims 14 - 23 comprising attaching the frame to the pig trap by attaching the frame to the conical reducer.
25. The method of any one of Claims 14 - 24 wherein the extendable actuator comprises a hydraulic cylinder connected to a hydraulic power supply by hoses and wherein the hydraulic power supply is located at a sufficient distance from the pig trap to reduce a fire hazard presented by operating the power supply in proximity to petroleum fumes from the pig trap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2516575A CA2516575C (en) | 2005-08-22 | 2005-08-22 | Method and apparatus for pushing a dual diameter pig into a pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2516575A CA2516575C (en) | 2005-08-22 | 2005-08-22 | Method and apparatus for pushing a dual diameter pig into a pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2516575A1 true CA2516575A1 (en) | 2007-02-22 |
| CA2516575C CA2516575C (en) | 2010-10-05 |
Family
ID=37770733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2516575A Active CA2516575C (en) | 2005-08-22 | 2005-08-22 | Method and apparatus for pushing a dual diameter pig into a pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2516575C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10837590B2 (en) | 2018-06-04 | 2020-11-17 | Marvin Duke | Pipeline pig retrieval apparatus |
| US11703176B2 (en) | 2017-11-06 | 2023-07-18 | Warren Peterson | Apparatus and method for loading a pig into a pipeline |
-
2005
- 2005-08-22 CA CA2516575A patent/CA2516575C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11703176B2 (en) | 2017-11-06 | 2023-07-18 | Warren Peterson | Apparatus and method for loading a pig into a pipeline |
| US10837590B2 (en) | 2018-06-04 | 2020-11-17 | Marvin Duke | Pipeline pig retrieval apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2516575C (en) | 2010-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |