4 results about "Offshore pipelines" patented technology

The invention relates to the technical field of offshore pipeline body construction, and discloses a structure for preventing pipeline rotation during pipeline laying and a construction method.The structure comprises a pipeline launching frame used for launching a pipeline body and a rail piece arranged above the pipeline launching frame, and a plurality of fixed portal frames are arranged at the top of the pipeline launching frame; the inner wall of the fixed portal frame is connected with the top of the rail piece, a plurality of slidable pulley blocks are installed on the rail piece, anchor chains are connected to the bottoms of the pulley blocks, the bottom ends of the anchor chains are connected to the top of the pipeline body, and a plurality of buoys are installed on the surface of the pipeline body. According to the structure for preventing the pipeline from rotating in the pipeline laying process and the construction method, when the pipeline body slides down along the rail piece, rotation of the pipeline body is restrained through constraint of the anchor chain and the pulley block; the buoyancy balance provided by the buoy and the symmetrical sacrificial anode protection blocks on the two sides are used for balancing the gravitational torque after the pipeline body enters the sea, and rotation of the pipeline body is restrained.

The utility model discloses an auxiliary mechanism for offshore casing pipe installation, which comprises a pipe sleeve, a sealing gasket is protruded on the part of the inner wall of the pipe sleeve, which is abutted against a pipeline, the sealing gasket is provided with a flow guide groove which is aligned with the joint of the pipeline, and the flow guide groove is matched with a monitoring mechanism to monitor the leakage of a medium in the pipeline at the joint of the pipeline. According to the utility model, the sealing gasket is arranged on the inner wall of the pipe sleeve, and the diversion trench is arranged on the sealing gasket, so that the medium in the leaked pipeline at the pipeline joint is accurately collected and guided, once the pipeline leaks, the medium in the pipeline flows into the diversion trench under the guide of the sealing gasket and is in contact with the monitoring rod of the monitoring mechanism, and the sensor can quickly detect the leakage; by means of the design, the monitoring sensitivity of medium leakage in the pipeline is improved, potential safety hazards can be found in the first time, environmental pollution and resource waste caused by medium leakage in the pipeline are avoided, and the safety and stability of offshore pipeline transportation are effectively guaranteed.

The invention discloses a method for laying an offshore pipeline penetrating through an existing dike. The method comprises the steps that S1, construction preparation is conducted; s2, engineering measurement is carried out; step S3, constructing a cofferdam; s4, engineering construction of the embankment penetrating pipe body is carried out; s5, embankment body filling is carried out; s6, soil is cemented, and earthwork is closed; s7, upstream face slope protection construction is conducted; s8, constructing an inner slope and a wave wall; step S9, construction of the embankment top pavement; s10, land pipe construction is carried out; and S11, cofferdam dismantling construction is conducted. The stability and safety of the dike structure are ensured, the investment cost is reduced, and the construction period is shortened.

The utility model relates to the technical field of sea pipe repair splicing auxiliary device, disclose a kind of sea pipe repair splicing auxiliary device with anticorrosive coating, including repair mesa, the repair mesa bottom is fixedly connected with multiple support columns, every two the support column between fixedly connected with connecting column, connecting column outer wall rotationally connected with swing frame, the repair mesa inside is provided with adjusting assembly, the adjusting assembly includes handlebar, the handlebar rotationally connected in the repair mesa interior, handlebar side wall is fixedly connected with bidirectional screw rod, the bidirectional screw rod outer wall is connected with multiple sliding blocks, each the sliding block lower surface is fixedly connected with hanging platform. In the utility model, by handlebar, bidirectional screw rod and swing frame transmission, realize the flexible adjustment of repair mesa height, solve the problem of the fixed height of traditional auxiliary device, adapt to the height requirement of different sea pipe repair, ensure that pipeline butt joint is accurate when repairing, reduce the situation of not tight or not stable joint.