The invention is relevant to collecting the position and attributes of oil, gas, utility pipelines and other assets in an open ditch or trench before it is backfilled.
This Summary is provided to introduce in a simplified form a selection of concepts that are further described below in the Detailed Description. This Summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
In the oil and gas industry and other utility industries, the process of collecting the position and attributes of a pipeline (oil, gas, water, sewer, etc.), or fiber-optic or copper cables, or other types of assets in the open ditch or trench before it is backfilled is simultaneously necessary and unpopular. It is necessary for safety (i.e., future one-call protection—a number to call before you dig to have underground utilities marked), maintenance, and management of the asset. It is unpopular because as currently accomplished the entire workflow is complicated, slow, error prone, and expensive. The work is done to achieve the following goals:
1. Absolute Position of the Asset—Determination and recording of the absolute position of the asset (e.g., a pipeline, cable, or other asset) means the establishment of its relation to an officially defined datum and coordinate system which in the United States often means the National Spatial Reference System (NSRS), defined and managed by the National Geodetic Survey (NGS).
2. Relative Position of the Asset—Determination and recording of the relative position of the asset means the establishment of the position of each of its components in relation to the others. In other words, it means the position of the asset in relation to itself.
3. Attribution of the Asset—Attribution is the capture and recording of the non-spatial data about the asset, such as Yield Strength, Joint Number, Manufacturer, etc.
4. Imagery of the Asset—When the asset is buried it can no longer be seen. The imagery captured and recorded in this process provides that visibility after the asset is buried.
5. Three-Dimensional Model of the Asset—The size and orientation of the asset and each of its components in three dimensions helps to ensure proper facility management.
6. Linkage of the Asset With Its Position, Its Attributes, Its Image, And Its 3D Digital Model—This aspect is the assignment of the appropriate attributes to the correct relative positions, absolute positions, imagery, and 3D model of the asset.
These targets are utilized in establishing the absolute and relative positions of the asset and are utilized in photogrammetry applications as is known in the prior art. The targets can be any object that has a known center and place.
The result of this work is a hard copy drawing and/or digital file in which the pipeline and other features are represented with 2D points and lines as shown in a simplified form in
Thus, there is need in the art for a new and improved process for data collection, attribution, and data base storage of open-ditch pipeline as-built data that can be acquired more quickly, more efficiently, and at less cost. An improved process must be capable of providing the following:
1. It must produce a 3D model of the pipeline or other asset in the ditch or trench and establish both the relative and absolute position of the assets in the 3D model.
2. It must produce a 3D model of all attendant features in the ditch or trench, such as Foreign Crossings 4, Risers 5, Trench Breakers 6, Tees 7, etc., as shown if
3. It must capture and record data about the non-spatial attributes of the asset (e.g., a pipeline), such as Yield Strength, Joint Number, Manufacturer, etc. (as shown on pipes in
Additional important attributes, not shown on the illustrated label, may include: Yield Yield Strength, Joint Number, Manufacturer, X-Ray Number, etc.
4. It must capture and record the necessary attributes of the attendant features on the asset, such as Bends 8, Flanges 9, Valves 10, Welds 11, etc., some of which are described below and as shown in
The detailed description below describes how data collection in the improved method for building a 3D model is accomplished through either Three-Dimensional LiDAR Scanning (3DLS) technology or terrestrial photogrammetry. These techniques are augmented with the use of GPS measurements and sometimes further augmented with an Inertial Measurement Unit (IMU), either in real-time or through photo-identifiable targets, for the determination of relative and absolute positions of the assets captured in the 3D model.
As used herein, “at least one,” “one or more,” and “and/or” are open-ended expressions that are both conjunctive and disjunctive in operation. For example, each of the expressions “at least one of A, B and C,” “at least one of A, B, or C,” “one or more of A, B, and C,” “one or more of A, B, or C,” and “A, B, and/or C” means A alone, B alone, C alone, A and B together, A and C together, B and C together, or A, B and C together. When each one of A, B, and C in the above expressions refers to an element, such as X, Y, and Z, or class of elements, such as X1-Xm, Y1-Yn, and Z1-Zo, the phrase is intended to refer to a single element selected from X, Y, and Z, a combination of elements selected from the same class (e.g., X1 and X2) as well as a combination of elements selected from two or more classes (e.g., Y1 and Z3).
It is to be noted that the term “a entity” or “an entity” entity refers to one or more of that entity. As such, the terms “a” (or “an”), “one or more,” and “at least one” can be used interchangeably herein. It is also to be noted that the terms “comprising,” “including,” and “having” can be used interchangeably.
To assist in the understanding of the present disclosure the following list of components and associated numbering found in the drawings is provided herein:
With the computing environment in mind, embodiments of the present invention are described with reference to logical operations being performed to implement processes embodying various embodiments of the present invention. These logical operations are implemented (1) as a sequence of computer implemented steps or program modules running on a computing system and/or (2) as interconnected machine logic circuits or circuit modules within the computing system. The implementation is a matter of choice dependent on the performance requirements of the computing system implementing the invention. Accordingly, the logical operations making up the embodiments of the present invention described herein are referred to variously as operations, structural devices, acts, applications, or modules. It will be recognized by one skilled in the art that these operations, structural devices, acts, applications, and modules may be implemented in software, firmware, special purpose digital logic, and any combination thereof without deviating from the spirit and scope of the present invention as recited within the claims attached hereto.
Referring now to the Figures, like reference numerals and names refer to structurally and/or functionally similar elements thereof, and if objects depicted in the figures that are covered by another object, as well as the tag line for the element number thereto, may be shown in dashed lines.
It is typical to string pipe along the ditch or trench into which it will be laid (see
Data collection methods, such as terrestrial photogrammetry, aerial photogrammetry, and 3DLS, provide imagery and point clouds systematically. It is therefore possible to read the attributes encoded in the QR Code 12 directly from the imagery and/or point cloud. In this way it is possible to capture both the attributes of the feature and the position of the encoded attributes on the feature. In this way the information unique to each joint of pipe is attached to that joint positionally.
Three-Dimensional LiDAR Scanning
With respect to 3DLS, when a laser is pointed at the asset, the beam of light is reflected by the surface it encounters. A sensor records this reflected light to measure a range. When laser ranges are combined, the result is a dense, detail-rich group of elevation points, called a “point cloud.” Each point in the point cloud has three-dimensional spatial coordinates (latitude, longitude, and height) that correspond to a particular point on the asset and surrounding area from which a laser pulse was reflected.
This technology can be applied on a smaller scale to an asset in a trench, such as a pipe. Data collection utilizing 3DLS is extremely quick. Targets 13 for determining position for control purposes may be mounted on a tripod as shown in
The still picture shown in
Terrestrial Photogrammetry
An example of terrestrial photogrammetry is shown in
Also, instead of just one camera, an array of four, five, or six cameras may be used as shown in
The details of the process used in the terrestrial photogrammetry solution are discussed below. The images shown in
Zooming out, the Squares 17 indicating the camera positions can be seen as shown in
The Digital Photographs 16 were taken from left to right, approximately fifteen feet from Pipe 14 (seven photographs). At each joint, a close-up image was taken (two photographs) of the QR Codes 12 at the joints as shown in
The 3D model can be exported as an LAS file. The quality is set to ultra-high and the points are colored according to the photography. The 3D model can also be exported as an ortho-photo. In this case, the projection plane is top and the blending is mosaic. In AutoCAD, the LAS file is used to create a point cloud object as shown in
Listing the object shows that there are a total of over 21 million points in the 3D model, but only approximately 3 million points are displayed by AutoCAD. Using another viewer, such as Photo Soft, a close-up of the QR Code 12 array is shown in
Going back to AutoCAD, the view shown in
In Photo Soft, the target positions can be exported as a CSV file. Switching to the ground control plane as shown in
These Target 13 positions are exported to a CSV file, which is read by AutoCAD. Switching to AutoCAD, the points are imported and the points come in right on the targets in the image as shown in
In order to capture the QR Code 12 data message, a switch is made to Photo Soft and the close-up photos are displayed. 327 Target 13 has been located as shown in
Next, as shown in
Switching back to AutoCAD, the point which corresponds to 327 Target 13 is located as shown in
The QR Code 12 data message from QR Reader 18 is transferred to the AutoCAD database and the data is displayed as shown in
The same process is used for the other QR Codes 12 (i.e., go back to Photo Soft, highlight the close-up image of QR Code 12, zoom in, position QR Reader 18, capture the QR Code 12 data message, switch back to AutoCAD, locate the point for the target, and transfer the data message from QR Reader 18 to the database). At this time the points can also be repositioned. The image is turned off and the O-snap set to Node, which will allow the use of the point data from the cloud. The point is highlighted as shown in
The point is moved to the center of the weld. It snaps to one of the points in the point cloud and now a proper X, Y, and Z for the weld is secured as shown in
A repetitive Bar-Code 19 is included on the full length of each pipe section as shown in
Process Development
The As-Built Process 100 as shown in
A repeating loop in Step 108 is followed until there are no more images of the asset to capture. In Step 110 the attribute and model data are uploaded to a computer for storage in a database, and in Step 112 the attribute and model data are processed to create a 3D digital model of the asset and all of its features, attributes, and attendant features that have been captured in the field, and the process ends. Instead of taking weeks to develop deliverables that are usable by various stakeholders, the deliverables can be procured in just a matter of hours or a few days. The data processing stage described above can also be further automated through program routines and algorithms to speed up the data processing stage.
The As-Built Process 100 as shown in
As.Bullt Process 100 begins in Step 102 where optically read codes, such as QR Codes 12 and/or Bar-Codes 19, are affixed to the assets. These are affixed in the field if they were not affixed to the assets in the manufacturing process. Next, in Step 104 the assets are positioned in the ditch or trench where they will permanently reside. Alternatively, Step 102 may be performed after Step 104 instead of before. As shown above, in Step 106 3DLS and photogrammetry are two ways to quickly and efficiently gather the imagery and other digital information from which the attribute data and model data of the asset are derived in the processing step. With 3DLS, an operator utilizes a LiDAR scanner (see
A repeating loop in Step 108 is followed until there are no more images of the asset to capture. In Step 110 the imagery and/or digital data are uploaded to a computer for storage in a database, in anticipation of processing. In Step 112 the attributes and 3D models are derived from the uploaded data. The processing produces all of the asset features, attributes, and attendant features that have been captured in the field, and the process ends. Instead of taking weeks to develop deliverables that are usable by various stakeholders, the deliverables can be procured in just a matter of minutes or hours. The data processing stage described above can be further automated through program routines and algorithms to speed up the data processing stage.
Components of Computer System 30 may include, but are not limited to, the following elements. Processing Element 31 communicates to other elements of the Computer System 30 over a System Bus 32. Input Devices 33, such as a keyboard, mouse, joy stick, or other type of pointing device allows a user to input information into Computer System 30, and a Graphics Display 34 allows Computer System 30 to output information to the user. Graphics Display 34 may also be touch screen enabled, allowing a user to input information into Computer System 30 through this mode. A Storage Device 35 is used to store data, such as in a database, and various software programs within Computer System 30. A Memory 36, also connected to System Bus 32, contains an operating system, and various software applications, such as AutoCAD and Photo Soft. A Communications Interface 37 is also connected to System Bus 32. Communications Interface 37 may have one or more serial ports, parallel ports, infrared ports, and the like. Connectable through Communications Interface 37 may be an external printer or scanner (not shown), as well as access to Communication Network 29.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims. It will be understood by those skilled in the art that many changes in construction and widely differing embodiments and applications will suggest themselves without departing from the scope of the disclosed subject matter.
This application claims the benefit of U.S. Provisional Application Ser. No. 61/826,005 filed on May 21, 2013 titled “IMPROVED OPEN-DITCH PIPELINE AS-BUILT PROCESS” which is incorporated herein by reference in its entirety for all that is taught and disclosed therein.
Number | Date | Country | |
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61826005 | May 2013 | US |