Method for splicing flanges of offshore oil delivery pipes underwater
An oil pipeline, underwater docking technology, applied in the direction of pipeline laying and maintenance, pipe/pipe joints/pipe fittings, mechanical equipment, etc., to shorten working time, improve work efficiency, and save installation costs.
Inactive Publication Date: 2010-12-15
CHINA NAT OFFSHORE OIL CORP +2
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the low visibility underwater, it poses a great hidden danger to the safety of underwater divers
At the same time, it is also easy to cause collisions between the flanges of the submarine oil pipeline.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] (3) After the seabed oil pipeline 11 (expansion elbow) flange 22 is in place underwater, unclamp the cable on the seabed oil pipeline 11 (expansion elbow), and untie the string or rope tied on the guide chain 4 Iron wire, the diver passes the guide chain 4 on the lever block 5 correspondingly through several screw holes 3 on the flange 2 of the submarine oil pipeline 1 (flat pipe or riser) laid on the seabed. Several ∏-shaped lock plates 6 made of steel plates are respectively placed on each guide chain 4 from the opening, so that the guide chain 4 is placed in the groove of the lock plate 6, and the two sides of the ∏-shaped lock plate 6 are respectively welded There is a connecting plate 7 perpendicular to the two side plates, the connecting plate 7 is provided with a through hole, and a connecting rod 8 passes through the through hole on the connecting plate 7, and the two ends are bent and fixed, and the guide chain 4 and the locking plate 6 are locked and fixed. Co...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for splicing flanges of offshore oil delivery pipes underwater, which comprises the following splicing steps: a plurality of pulling hoists are arranged at a plurality of screw holes of the flanges of the pipes in advance before the pipes needing to be spliced are lifted and put into water, and leading chains of the pulling hoists respectively pass through the screw holes of the flanges of the pipes and are fixed; the leading chains correspondingly pass through screw holes of flanges of pipes at the other side one by one after the flanges of the pipes are in position underwater, a plurality of lock plates are respectively fixedly connected with the leading chains, and malposed flanges at two sides are pulled together by the leading chains; and the flangesof the pipes at two sides are connected and fixed together by bolts. The invention is suitable for splicing flanges of offshore oil delivery pipes in the situation of low visibility underwater, poor sea condition and deep water, enhances the safety factor and the whole construction safety of underwater working of divers, effectively protects the flanges of the offshore oil delivery pipes, saves agreat amount of manpower and materials and improves the working efficiency.
Description
technical field [0001] The invention relates to a method for connecting pipelines, in particular to a method for underwater connecting flanges of a submarine oil pipeline. Background technique [0002] In offshore oil development projects, it is necessary to lay submarine oil pipelines on the seabed. The submarine oil pipeline includes: a flat pipe, a standpipe and an expansion elbow. The end of the submarine oil pipeline is installed and connected with a flange, and several screw holes are arranged on the flange. When the flanges of flat pipes, risers and expansion elbows of submarine oil pipelines are connected underwater, usually, the method of hoisting the flanges of submarine oil pipelines by supporting the crane on board is usually carried out. Underwater docking between orchids. Affected by sea conditions, when the support ship is bumping up and down, the submarine oil pipeline also floats up and down. It is more difficult for divers to carry out flange docking ope...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F16L1/26
CPCF16L1/26
Inventor 王希庆严国华刘志强
Owner CHINA NAT OFFSHORE OIL CORP