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How to solve the problem of cement sheath in oil wells with top drive plugs?

2023-10-09 14:28:22
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Top drive plug is a widely used equipment in oil well cementing operations. It achieves control and regulation of the oil well by controlling the fluid flow in the well. The top drive plug has the characteristics of simple structure, reliable operation, and excellent sealing performance, and is suitable for various cementing operation needs. In oil well cementing operations, the use of top drive plugs can effectively improve operational efficiency and safety, providing strong support for oil and gas extraction.

The top drive plug is widely used in oilfield development. It can be used in oil well drilling operations to complete the wellbore drilling operation by drilling the top and exit plugs. Secondly, top drive plugs can also be used in oil well completion operations to complete plugging and completion operations through the insertion and extraction of plugs. In addition, top drive plugs can also be used in oil well repair operations to achieve repair and maintenance of oil wells through the insertion and extraction of plugs.

How to solve the problem of cement sheath in oil wells with top drive plugs?

Let's learn about the cement sheath issue in oil wells. During the drilling process of an oil well, the oil casing is placed inside the wellbore to form a circular space. In order to enhance the fixed strength of the wellhead and prevent the infiltration of formation fluids into the casing gap, it is necessary to fill the space between the casing and the wellbore with cement slurry to form a cement ring. However, due to the complex geological conditions of the formation, the large depth of the well, and the possibility of loss of control during drilling, the cement sheath is not complete and tight enough, resulting in some problems.

The cement sheath problem in oil wells includes situations such as unqualified cement sheath quality, detachment from the wellbore, and incompleteness. These issues may lead to dangerous situations such as loss of control of downhole pressure, leakage of formation fluids, and pose challenges to wellhead fixation and oil well production.

Top drive plug is a tool that can solve the problem of cement sheath in oil wells. It improves the fixing effect by compacting the cement sheath, while filling the defective areas, enhancing the integrity and tightness of the cement sheath, and ensuring the safe operation of the oil well.

Top drive plug valves are usually composed of multiple parts, including valve body, valve cover, valve seat, valve core, sealing ring, etc. The valve body is the main part of the top drive plug, usually made of metal material, with high strength and corrosion resistance. The valve cover and seat are used to fix the valve core and ensure the normal operation of the top drive plug. The valve core is a key part of the top drive plug, and its movement determines the opening and closing status of the top drive plug. The sealing ring is used to ensure the sealing performance of the top drive plug, and can still maintain good sealing effect in high-pressure and high-temperature environments.

Top drive plug is a hydraulic driven equipment that uses a hydraulic drive system to convert hydraulic energy into mechanical energy, achieving automation of oil well drilling, completion, and repair operations. The top drive plug is usually composed of a power unit, hydraulic transmission system, drill string chuck, pneumatic reset system, and other parts. Among them, the power device is usually powered by a diesel engine or an electric motor driving a hydraulic pump, while the hydraulic transmission system includes a hydraulic transmission device and a working oil tank. The drill string chuck is used to fix and release the drill string, while the pneumatic reset system is used to reset the top drive plug to its initial state.


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