CN101929581B - Underwater pipe clamp mounting method - Google Patents
Underwater pipe clamp mounting method Download PDFInfo
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- CN101929581B CN101929581B CN2009100871995A CN200910087199A CN101929581B CN 101929581 B CN101929581 B CN 101929581B CN 2009100871995 A CN2009100871995 A CN 2009100871995A CN 200910087199 A CN200910087199 A CN 200910087199A CN 101929581 B CN101929581 B CN 101929581B
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- pipe clamp
- steel wire
- tightener
- flange
- pipe
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Abstract
The invention relates to an underwater pipe clamp mounting method, which comprises the following steps: (1) the mounting position of an underwater pipe clamp (1) and the positions of three platform winches are determined; (2) the mounting datum line of a plurality of pipe clamps is determined; (3) the concentricity position of a plurality of pipe clamps is determined; (4) a plurality of pipe clamps are mounted, namely 1) a first steel wire (9), a second steel wire (10) and a third steel wire (11) of the three platform winches are adjusted, so as to form a three-dimensional coordinate system; 2) one pipe clamp (1) is placed to the mounting position, a flange tightener steel wire (12) is taken as the mounting datum line of an outer clamp (6), the mounting position and angle of the pipe clamp (1) are determined, the pipe clamp (1) encircles a pipe frame construction member (2), and the pipe clamp (1) is fixed; and the rest pipe clamps (1) are mounted by repeating the steps 1) and 2). The invention can simultaneously respectively carry out pipe clamp mounting fixing and coaxial adjusting, and underwater pipe clamp mounting efficiency and the coaxial accuracy ratio of pipe clamps are improved.
Description
Technical field
The present invention relates to the installation method of pipe clamp, relate in particular to a kind of installation method that is applicable to underwater pipe clamp.Belong to offshore oil engineering field.
Background technique
At sea in the petroleum development engineering, need be at submarine laying pipeline under the ocean and submarine cable.Pipeline under the ocean comprises: flat pipe, platform standpipe and expansible bend, platform standpipe are the chief components that is used for connecting flat pipe and Shunping County, pipeline termination platform member is drawn the water surface.
After at sea the oil field is constructed and put into operation; Because the foundation of the further exploitation in oil field and new platform; Need to set up newly-increased submerged pipeline and newly-increased cable, this just need install newly-increased standpipe and cable protecting tube on original platform, and riser clip or cable protecting tube clamp are used for standpipe or cable protecting tube are fixed on the jacket member; Because standpipe and cable protecting tube all are the steel pipes; Must adjust concentricity accurately when pipe clamp is installed, just make the wild card center of circle of all pipe clamps accurately on same axis, just can carry out the installation of standpipe and cable protecting tube.
Shown in Figure 2 like Fig. 1 one; Existing underwater pipe clamp when mounted; Generally be on platform, to use winch steel wire 3 to transfer the mounting point of pipe clamp 1 earlier to jacket member 2; Then, by the diver use Lever Blocks 4 with pipe clamp 1 after jacket member 2 is in place, welding antislip plate 5 is guaranteed the stationarity of pipe clamp 1 below pipe clamp 1.Reach standard in order to ensure the welding procedure technological requirement; The selection of welding consumables requires very high, and is also high to the welding technique requirement of welding operator under water, therefore; It is bigger to implement the welding difficulty under water, and this has just increased diver's diving workload and unsafe factor greatly.And there is certain defective in WET WELDING under water, and it is very big that the member mother metal is injured coefficient, thereby reduces the working life of platform.
Like Fig. 2-shown in Figure 4, after underwater pipe clamp 1 installed and fixed in advance, the concentricity of pipe clamp 1 had very large deviation, need carry out same axial adjustment to pipe clamp 1, with the center of circle of the wild card 6 of guaranteeing underwater pipe clamp 1 on same axis.All be to adopt a simulation standpipe 7 to try to install, when examination is installed, generally be on platform, to use winch steel wire 3 and winch steel wire 8 to transfer simulation standpipe 7 in the past.Because all pipe clamps 1 are fixing, this process also will be loosened and fastening pipe clamp 1 screw, uses mechanical force more rambunctious on pipe clamp 1.Policer operation is left-right rotation pipe clamp 1 in position, and it can be alignd with the superincumbent pipe clamp 1 of installation, like simulation standpipe 7 length limited of adjustment concentricity, also need transpose step by step.The error rate and the water surface that this method has strengthened pipe clamp 1 concentricity reach the operating time under water more than 13; When the standpipe in later stage is installed, also need to adjust pipe clamp 1 sub-concentricity once more, therefore according to standpipe in kind; The installation steps of existing underwater pipe clamp are more loaded down with trivial details, can't disposablely put in place.
Summary of the invention
Main purpose of the present invention is to overcome the above-mentioned shortcoming that existing installation method exists; And a kind of installation method of improved underwater pipe clamp is provided; It can install and fix pipe clamp and carry out synchronously with two of axial adjustment work mutual noninterference; Make and install and settle at one go, improved the installation efficiency and the pipe clamp coaxial accuracy of underwater pipe clamp with axial adjustment; Reduce diver's underwater operation amount, avoided the simulative tube that hangs waterborne to carry out clamp with the loaded down with trivial details operation of axial adjustment and carry out weld job under water, improved the overall security of diver's underwater operation and construction.
The objective of the invention is to realize by following technological scheme:
1, a kind of installation method of underwater pipe clamp comprises:
1) several underwater pipe clamps are fixed on respectively on the jacket member (2),
2) to several under water clamp carry out same axial adjustment, the circle centre position that makes all wild cards (6) that are fixed on several underwater pipe clamps on the jacket member (2) is on same axis; It is characterized in that:
Following installation steps are adopted in above-mentioned installation:
(1) confirm the mounting point of underwater pipe clamp and the putting position of three platform winches:
1. according to the structure and the construction technical requirement of jacket, confirm the mounting point of underwater pipe clamp;
2. the jacket member (2) of underwater pipe clamp mounting points is carried out the marine growth cleaning, and according to the putting position of three platform winches of installation position selection of pipe clamp (1);
(2) confirm the installation reference line of several pipe clamps:
1. confirm the mounting point of first pipe clamp (1 ') on the above jacket member of the water surface (13) (2) earlier; And be basic point with the mounting point of this jacket member (2), an end of flange tightener steel wire (12) is fixed on the mounting point of this jacket member (2) upper end;
2. the diver draw flange tightener steel wire (12) the other end to nethermost jacket member (2) on second pipe clamp (1 ") mounting point; after confirming pipe clamp mounting center line, (12 are fixed on the mounting point of second pipe clamp on the bottom jacket member (2) (1 ") with flange tightener steel wire;
3. tighten up flange tightener steel wire (12), and be several pipe clamp installation reference lines with the flange tightener steel wire (12) that tightens up;
(3) confirming of several pipe clamp concentricity positions:
1. the first winch steel wire (9) in three winches on the platform, the second winch steel wire (10), the 3rd winch steel wire (11) are connected respectively on three diverse locations of a pipe clamp; Then, the first winch steel wire (9) in three winches on the platform, the second winch steel wire (10), the 3rd winch steel wire (11) are adjusted three-dimensional system of coordinate of formation respectively;
2. the first winch steel wire (9), the second winch steel wire (10), the 3rd winch steel wire (11) in three winches lifts by crane simultaneously and transfers nethermost second pipe clamp (1 ") to the mounting point; with the flange tightener steel wire (12) that tightens up is second pipe clamp (1 ") installation reference line; Second pipe clamp (1 ") is filled the span of a man's arms on jacket member (2), and second pipe clamp (1 ") is fixed;
3. take off winch steel wire (9), (10), (11), and reclaim;
4. loosen flange tightener steel wire (12), the diver unties the immovable point of flange tightener steel wire (12) lower end, the lower end of flange tightener steel wire (12) is fixed on the wild card (6) of second pipe clamp (1 "); Untie the upper end immovable point of flange tightener steel wire (12); The upper end of flange tightener steel wire (12) is fixed on the wild card (6) of first pipe clamp (1 '), and upper and lower two immovable points of flange tightener steel wire (12) are identical with the relative position of upper and lower wild card (6);
5. tighten up flange tightener steel wire (12), the flange tightener steel wire (12) and the spacing of jacket member (2) are consistent up and down, confirm the installation reference line of several pipe clamps;
(4) installation of other several pipe clamps:
1. steel wire (9), (10), (11) with three winches on the platform are connected respectively on three diverse locations of a pipe clamp, then, three-dimensional system of coordinate of formation are adjusted in steel wire (9), (10), (11) of three winches on the platform;
2. the steel wire of three winches (9), 10), (11) are lifted by crane simultaneously and are transferred one of them pipe clamp to the mounting point; With flange tightener steel wire (12) is the installation reference line of wild card (6); Confirm the mounting point and the angle of pipe clamp; Pipe clamp is filled the span of a man's arms on jacket member (2), and pipe clamp is fixed; 1. and 2. the installation repetition above-mentioned steps of several pipe clamps of later other.
In definite step of said several pipe clamp concentricity positions: transfer nethermost second pipe clamp (1 ") behind the mounting point; with the flange tightener steel wire 12 that tightens up) be second pipe clamp (1 ") installation reference line; The first winch steel wire (9) in three winches is used for adjusting the height up and down of second pipe clamp (1 "); the second winch steel wire (10) and the 3rd winch steel wire (11) are respectively applied for the position, the left and right sides of adjusting second pipe clamp (1 "); And use Lever Blocks (4) that second pipe clamp (1 ") is finely tuned, to confirm the mounting point of second pipe clamp (1 ").
In the installation steps of said other several pipe clamps; Transfer one of them pipe clamp behind the mounting point; The first winch steel wire (9) in three winches is used for adjusting the height up and down of pipe clamp; The second winch steel wire (10) and the 3rd winch steel wire (11) are respectively applied for the position, the left and right sides of adjustment pipe clamp, and use Lever Blocks (4) that pipe clamp is finely tuned, to confirm the mounting point and the angle of pipe clamp.
Beneficial effect of the present invention: the present invention can install and fix pipe clamp and carry out synchronously with two of axial adjustment work mutual noninterference, makes and installs and settle at one go with axial adjustment, has improved the installation efficiency and the pipe clamp coaxial accuracy of underwater pipe clamp; Reduce diver's underwater operation amount, avoided the simulative tube that hangs waterborne to carry out clamp with the loaded down with trivial details operation of axial adjustment and carry out weld job under water, improved the overall security of diver's underwater operation and construction.
Description of drawings:
Fig. 1 is existing pipe clamp scheme of installation.
Fig. 2 installs local enlarged diagram for existing pipe clamp.
Fig. 3 is for having pipe clamp now with the axial adjustment schematic representation.
Fig. 4 is for having pipe clamp now with the local enlarged diagram of axial adjustment.
Fig. 5 carries out schematic representation for pipe clamp of the present invention installs and fixes with pipe clamp with axial adjustment synchronously.
Fig. 6 carries out local enlarged diagram for pipe clamp of the present invention installs and fixes with pipe clamp with axial adjustment synchronously.
Main label declaration among the figure:
1, pipe clamp, 2 jacket members, 3 winch steel wires, 4 Lever Blocks, 5 antislip plates, 6 wild cards, 7 simulation standpipes, 8 winch steel wires, 9 winch steel wires, 10 winch steel wires, 11 winch steel wires, 12 flange tightener steel wires, 1 ' pipe clamp, 1 " pipe clamp, 13 waters surface.
Embodiment
Like Fig. 5-shown in Figure 6, the present invention includes:
1) several underwater pipe clamps 1 are fixed on respectively on the jacket member 2,
2) to several under water clamp 1 carry out same axial adjustment, the circle centre position that makes all wild cards 6 that are fixed on several underwater pipe clamps 1 on the jacket member 2 is on same axis;
Like Fig. 5-shown in Figure 6, present embodiment is that example explains that above-mentioned installation adopts step following so that 9 submerged riser clamps 1 to be installed:
(1) confirm the mounting point of submerged riser clamp 1 and the putting position of three platform winches:
1. according to the structure and the construction technical requirement of jacket, confirm the mounting point of submerged riser clamp 1;
2. the jacket member 2 of submerged riser clamp 1 mounting points is carried out the marine growth cleaning, and according to the putting position of three platform winches of installation position selection of riser clip 1.
(2) installation reference line of 9 pipe clamps of affirmation:
1. confirm the mounting point of the riser clip 1 ' on the water surface 13 above jacket members 2 earlier; And be basic point with the mounting point of this jacket member 2, the mode that adopts the nylon rope binding is fixed on an end of flange tightener steel wire 12 on the mounting point of these jacket member 2 upper ends;
2. the diver draw flange tightener steel wire 12 the other end to nethermost jacket member 2 on riser clip 1 " mounting point; after confirming pipe clamp mounting center line, adopt the mode of nylon rope binding that flange tightener steel wire 12 is fixed on the riser clip 1 on the bottom jacket member 2 " the mounting point on;
3. tightening up flange tightener steel wire 12, at this moment, is 9 pipe clamp 1 installation reference lines with the flange tightener steel wire 12 that tightens up.
Confirming of (3) 9 riser clip concentricity positions:
1. the steel wire 9,10,11 of three winches on the platform Joining clasp through separately is connected respectively on three diverse locations of a riser clip, then, the steel wire 9,10,11 of three winches on the platform is adjusted form a three-dimensional system of coordinate;
2. the steel wire 9,10,11 of three winches lifts by crane simultaneously and transfers nethermost riser clip 1 " to the mounting point; winch steel wire 9 is used for adjusting riser clip 1 " height up and down; Winch steel wire 10 is used to adjust riser clip 1 with winch steel wire 11 " position, the left and right sides; and use Lever Blocks 4 riser clamps 1 " finely tune; Flange tightener steel wire 12 to tighten up is a riser clip 1 " installation reference line, with riser clip 1 " fill the span of a man's arms on jacket member 2, and with riser clip 1 " adopt bolt connecting mode to fix;
3. take off winch steel wire 9,10,11, and reclaim;
4. loosen flange tightener steel wire 12, the diver unties the immovable point of flange tightener steel wire 12 lower ends, and the mode that adopts the nylon rope binding is fixed on riser clip 1 with the lower end of flange tightener steel wire 12 " wild card 6 on; Untie the upper end immovable point of flange tightener steel wire 12; The mode of employing nylon rope binding is fixed on the upper end of flange tightener steel wire 12 on the wild card 6 of riser clip 1 '; Upper and lower two immovable points of flange tightener steel wire 12 are identical with the relative position of upper and lower wild card 6, can use steel ruler to measure, confirm;
5. tighten up flange tightener steel wire 12, the flange tightener steel wire 12 and the spacing of jacket member 2 are consistent up and down.The installation of 8 riser clips 1 of after this other is to be the installation reference line of the wild card 6 of riser clip 1 with flange tightener steel wire 12.
(4) installation of other 8 riser clips:
1. the steel wire 9,10,11 of three winches on the platform Joining clasp through separately is connected respectively on three diverse locations of a riser clip, then, the steel wire 9,10,11 of three winches on the platform is adjusted form a three-dimensional system of coordinate;
2. the steel wire 9,10,11 of three winches lifts by crane simultaneously and transfers one of them pipe riser clip 1 to the mounting point; Winch steel wire 9 is used for adjusting the height up and down of riser clip 1; Winch steel wire 10 and winch steel wire 11 are used to adjust the position, the left and right sides of riser clip 1; And use Lever Blocks 4 riser clamps 1 to finely tune, and be the installation reference line of wild card 6 with flange tightener steel wire 12, that is: use steel ruler to measure; Guarantee relative position and the riser clip 1 ' and riser clip 1 of the center of circle and flange tightener steel wire 12 of the wild card 6 of riser clip 1 " the relative position of the center of circle and flange tightener steel wire 12 of wild card 6 identical; confirm the mounting point and the angle of riser clip 1, riser clip 1 filled the span of a man's arms on jacket member 2, and riser clip 1 employing bolt connecting mode is fixed; The installation method of other 7 riser clip 1 is the same.
Working principle of the present invention: adopt three winch steel wires 9,10 and 11 to form a three-dimensional system of coordinate, in order to the angle of adjustment pipe clamp 1, the steel wire 9,10,11 of three winches lifts by crane simultaneously and transfers one of them pipe clamp 1; After the concentricity immovable point is found in measurement, adjustment accurately in advance, utilize flange tightener steel wire 12 to pull into a vertical line from top to bottom, as the installation reference line of all pipe clamps; The box that tightens up with the steel wire tightener tightens up steel wire 12 again; All pipe clamp 1 concentric shafts just on this finer wire 12, afterwards, just can be adjusted concentricity accurately in fixed tube clamp 1 like this; Two work mutual noninterferences are carried out synchronously.After pipe clamp 1 installation, the concentricity of 1 riser clip 1 on 8 riser clips and the water surface 13 under water, error is no more than 2mm.
Advantage of the present invention:
1) is suitable for the installation of submerged riser, cable protecting tube clamp;
2) avoid carrying out under water the WET WELDING operation;
3) avoided using the simulation standpipe to carry out the loaded down with trivial details work procedure of pipe clamp with axial adjustment;
4) improve operating efficiency 50%, the validity of pipe clamp concentricity improves 50%;
5) improved the safety coefficient of diver's underwater operation.
6) improved working life of platform.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technological scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (3)
1. the installation method of a underwater pipe clamp comprises:
1) several underwater pipe clamps are fixed on respectively on the jacket member (2),
2) several underwater pipe clamps are carried out same axial adjustment, the circle centre position that makes all wild cards (6) that are fixed on several underwater pipe clamps on the jacket member (2) is on same axis; It is characterized in that:
Following installation steps are adopted in above-mentioned installation:
(1) confirm the mounting point of underwater pipe clamp and the putting position of three platform winches:
1. according to the structure and the construction technical requirement of jacket, confirm the mounting point of underwater pipe clamp;
2. the jacket member (2) of underwater pipe clamp mounting points is carried out the marine growth cleaning, and according to the putting position of three platform winches of installation position selection of pipe clamp (1);
(2) confirm the installation reference line of several pipe clamps:
1. confirm the mounting point of first pipe clamp (1 ') on the above jacket member of the water surface (13) (2) earlier; And be basic point with the mounting point of this jacket member (2), an end of flange tightener steel wire (12) is fixed on the mounting point of this jacket member (2) upper end;
2. the diver draw flange tightener steel wire (12) the other end to nethermost jacket member (2) on second pipe clamp (1 ") mounting point; after confirming pipe clamp mounting center line, flange tightener steel wire (12) is fixed on the mounting point of second pipe clamp on the bottom jacket member (2) (1 ");
3. tighten up flange tightener steel wire (12), and be several pipe clamp installation reference lines with the flange tightener steel wire (12) that tightens up;
(3) confirming of several pipe clamp concentricity positions:
1. the first winch steel wire (9) in three winches on the platform, the second winch steel wire (10), the 3rd winch steel wire (11) are connected respectively on three diverse locations of a pipe clamp, the first winch steel wire (9), second winch (10), the 3rd winch (11) in three winches on the platform are adjusted respectively formed a three-dimensional system of coordinate then;
2. the first winch steel wire (9), the second winch steel wire (10), the 3rd winch steel wire (11) in three winches lifts by crane simultaneously and transfers nethermost second pipe clamp (1 ") to the mounting point; with the flange tightener steel wire (12) that tightens up is second pipe clamp (1 ") installation reference line; Second pipe clamp (1 ") is filled the span of a man's arms on jacket member (2), and second pipe clamp (1 ") is fixed;
3. take off winch steel wire (9,10,11), and reclaim;
4. loosen flange tightener steel wire (12), the diver unties the immovable point of flange tightener steel wire (12) lower end, the lower end of flange tightener steel wire (12) is fixed on the wild card (6) of second pipe clamp (1 "); Untie the upper end immovable point of flange tightener steel wire (12); The upper end of flange tightener steel wire (12) is fixed on the wild card (6) of first pipe clamp (1 '), and upper and lower two immovable points of flange tightener steel wire (12) are identical with the relative position of upper and lower wild card (6);
5. tighten up flange tightener steel wire (12), the flange tightener steel wire (12) and the spacing of jacket member (2) are consistent up and down, confirm the installation reference line of several pipe clamps;
(4) installation of other several pipe clamps:
1. the steel wire (9,10,11) with three winches on the platform is connected respectively on three diverse locations of a pipe clamp, then, the steel wire (9,10,11) of three winches on the platform is adjusted three-dimensional system of coordinate of formation;
2. the steel wire of three winches (9,10,11) lifts by crane simultaneously and transfers one of them pipe clamp to the mounting point; With flange tightener steel wire (12) is the installation reference line of wild card (6); Confirm the mounting point and the angle of pipe clamp; Pipe clamp is filled the span of a man's arms on jacket member (2), and pipe clamp is fixed; In the installation repeating step (4) of several pipe clamps of later other 1. and 2..
2. the installation method of underwater pipe clamp according to claim 1; It is characterized in that: in definite step of said several pipe clamp concentricity positions: transfer nethermost second pipe clamp (1 ") behind the mounting point; with the flange tightener steel wire (12) that tightens up is second pipe clamp (1 ") installation reference line; The first winch steel wire (9) in three winches is used for adjusting the height up and down of second pipe clamp (1 "); the second winch steel wire (10) and the 3rd winch steel wire (11) are respectively applied for the position, the left and right sides of adjustment second pipe clamp (1 "), and uses Lever Blocks (4) that second pipe clamp (1 ") is finely tuned, with the mounting point of definite second pipe clamp (1 ").
3. the installation method of underwater pipe clamp according to claim 1; It is characterized in that: in the installation steps of said other several pipe clamps; Transfer one of them pipe clamp behind the mounting point, the first winch steel wire (9) in three winches is used for adjusting the height up and down of pipe clamp, and the second winch steel wire (10) and the 3rd winch steel wire (11) are respectively applied for the position, the left and right sides of adjusting pipe clamp; And use Lever Blocks (4) that pipe clamp is finely tuned, to confirm the mounting point and the angle of pipe clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100871995A CN101929581B (en) | 2009-06-19 | 2009-06-19 | Underwater pipe clamp mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100871995A CN101929581B (en) | 2009-06-19 | 2009-06-19 | Underwater pipe clamp mounting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101929581A CN101929581A (en) | 2010-12-29 |
| CN101929581B true CN101929581B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100871995A Expired - Fee Related CN101929581B (en) | 2009-06-19 | 2009-06-19 | Underwater pipe clamp mounting method |
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| CN (1) | CN101929581B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284828B (en) * | 2011-04-28 | 2013-06-19 | 中国海洋石油总公司 | Adjustment process for coaxiality of pipe clamp |
| CN102661444B (en) * | 2012-04-25 | 2013-10-30 | 中国海洋石油总公司 | Installation method of deepwater double piping system of offshore platform |
| CN103466038B (en) * | 2013-08-30 | 2016-01-20 | 中国海洋石油总公司 | A kind of FPSO single-point cone buoy inner connection tube replacing options |
| CN111735371B (en) * | 2020-06-23 | 2022-07-01 | 中国海洋石油集团有限公司 | Detection apparatus for marine riser checkpost axiality |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3699691A (en) * | 1971-02-08 | 1972-10-24 | Shell Oil Co | Method for connecting flowlines to a platform |
| CN1456832A (en) * | 2003-04-17 | 2003-11-19 | 冯毅 | Underwater pipe jacking tunnelling process with balanced supply and discharge |
| CN101327895A (en) * | 2007-06-22 | 2008-12-24 | 中国科学院沈阳自动化研究所 | Underwater suspension type mooring winch |
-
2009
- 2009-06-19 CN CN2009100871995A patent/CN101929581B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3699691A (en) * | 1971-02-08 | 1972-10-24 | Shell Oil Co | Method for connecting flowlines to a platform |
| CN1456832A (en) * | 2003-04-17 | 2003-11-19 | 冯毅 | Underwater pipe jacking tunnelling process with balanced supply and discharge |
| CN101327895A (en) * | 2007-06-22 | 2008-12-24 | 中国科学院沈阳自动化研究所 | Underwater suspension type mooring winch |
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|---|---|
| CN101929581A (en) | 2010-12-29 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: OFFSHORE OIL ENGINEERING Co.,Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: OFFSHORE OIL ENGINEERING Co.,Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. |
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Granted publication date: 20121128 |
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