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A wellbore rigid equipment is mainly composed of rigid tank road and tank road beam:
a Rigid tank road Rigid tank road is divided into four types: wooden tank road, rail tank road, steel combined tank road and integral rolling tank. The specifications, material characteristics and applicable conditions are shown in the table.
b Tank rails Tank rails (referred to as tank racks) are used to fix tank channels in the wellbore. The interlayer layers can Beams determined by the tank on the standard length, commonly used materials for the metal cans beam, the tank is also useful reinforced concrete beam, because of its larger cross section, are limited in use. In small and medium-sized metal mines, wooden cans are also used individually.
c . Arrangement of cans and cans According to the relationship between the position of the lifting container and the tank, the tanks are divided into two types: double side arrangement, single ground arrangement, end face arrangement and diagonal arrangement. Various arrangements.
In recent years, the arrangement of cantilever beam and cantilever support frame has been adopted, which has improved the utilization of the section and simplified the layer structure. Steel can be saved, and Heping No. 3 Mine of Pingdingshan No. 7 Mine is already in use. However, this structure requires high quality of the borehole wall and accurate installation requirements. Maintenance is more difficult.
Calculation and selection of d tank beam and tank path The calculation method of the load on the tank beam and the tank channel is usually calculated by static calculation method (when there is a fuse), that is, the external force assumed to be equal to the multiple of the static load of the lifting container. This method is simple to calculate, but the internal force decision is not clear enough.
Examples of commonly used tank beams in China are listed in the table.
For the calculation of wood cans, static calculation is generally used. For the sake of simplicity, the wood can road section can also be selected as shown.
B- well flexible equipment The flexible equipment system consists of a rope tank road with a fixing device at one end, a tensioning device at the other end, a guide on the lifting container, and a rigid tank path and cradle for each level of the vehicle. The rope channel has the following advantages over the steel channel:
( 1 ) There is no tank beam in the rope tank road, which can save steel and reduce the cost;
( 2 ) The structure is simple, the installation is convenient, and the construction period is short;
(3) It is easy to maintain, has a long service life, is simple to change rope, and has little impact on production;
( 4 ) The ropeway is flexible, and the lifting is stable without collision;
( 5 ) There is no tank beam in the well to reduce ventilation resistance.
The disadvantage of the rope is that the safety clearance is larger than that of the rigid tank, so the cross section of the wellbore is correspondingly increased, and the derrick is to suspend the tank rope, thus increasing the load on the derrick, and the bottom of the well is also equipped with a tensioning device. The depth, which increases the amount of wellbore engineering.
What are the wellbore equipment?
The wellbore equipment includes a tank road, a tank road beam, a ladder room, a bottom hole support structure, an over-winding device, a canister beam, and the like. Wherein the main components of the tank and the tank passage channel for the beam, its function is to eliminate the wobble lift when the vessel is running, lifting the container to ensure high-speed, safe operation, to prevent falling and lifting the container. Wellbore equipment can be divided into two types according to the form of tanks: rigid or flexible equipment.