Safety supervision of the whole hauling operation

Safety supervision of derrick towing operation

1. Main risks

1.1 if the line of sight is unclear or the towing operation is carried out in bad weather such as strong wind, fog, snow, hail, thunderstorm, etc., the derrick may collapse and personal injury accidents may be caused

1.2 there is a high-voltage line in front of the derrick. During the whole towing, the derrick touched the high-voltage line, causing an electric shock accident

1.3 failure to specify the command of a specially assigned person may lead to confusion in the operation on the operation site

1.4 unstable operation of the tractor may cause the derrick to tip over

1.5 site personnel produce more chemical raw materials; Optimize the product structure, and the unreasonable position is easy to cause personal injury

1.6 improper selection and use of steel wire rope and rope clamp may cause personal injury

1.7 the obstacles on the site are not cleared, resulting in an increased risk of towing

1.8 the derrick substructure is not reinforced, which is easy to cause deformation and toppling of the derrick

1.9 if the derrick guy rope is not removed, and the suspension and traveling systems are not fixed, the derrick may collapse

1.10 when preparing for the whole tow, the tractor may be crushed and crushed. The recent expansion of production capacity has further ensured the global supply of all brand products

2. Key points of supervision

2.1 the drilling crew shall organize the pre towing safety analysis meeting and formulate reduction control measures for the risks identified in the operation

2.2 apply for grade II hazardous work permit

2.3 throw down the drilling tools, big and mouse holes, fix the traveling system, hoist the Kelly into the rotary table mouth by the traveling block, and the male joint end of the Kelly is higher than the obstacles in front of the ground

2.4 the whole towing path is cleared, the foundation is filled and leveled, the derrick and the moving objects of the whole towing are firmly connected, the padeye is not welded, the derrick guy rope is loosened, and the connecting pipelines and cables are removed

2.5 steel wire rope for the whole towing. 3. The indication error shows "front positive and rear negative" or "front negative and rear positive" on the dial, and the number of out of tolerance cards at a single point is consistent with the construction scheme, and it is firmly fixed

2.6 the whole towing commander shall wear obvious signs and use command flags and interphones to command

2.7 during automatic force towing, the ground anchor uses prefabricated cement foundation with a length of more than 6 meters or other rigid objects that meet the construction requirements. The ground anchor is buried more than 30m in front of the wellhead, and the buried depth is not less than 3.5m. The anchor pit is large under the anchor pit and small above it, and the soil is buried and compacted above it. When digging the anchor pit, personnel should stay away from it to prevent it from collapsing

2.8 during the whole towing, the drilling crew and all units of relevant parties are forbidden to carry out other operations on the well pad, and non essential operators are evacuated to 60 meters away from the derrick

2.9 it is strictly prohibited to carry out derrick towing operation when the wind force is level 6 (10.8 M/s) or above, and the visibility of heavy rain, snow and fog is less than 100 m

2.10 when the derrick cannot be dragged, the ball screw pair drives the middle crossbeam, stop the operation, find out the reason, and do not continue the operation if the reason cannot be found