A short joint device for liner entry into well
A technology of short joints and liner, applied in wellbore/well valve devices, wellbore/well components, sealing/packing, etc. Achieve the effect of ensuring pressure balance and reducing operational risks
Active Publication Date: 2018-09-25
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
At the same time, this periodic grouting operation also seriously slows down the operation process and greatly increases the operation cost, especially for offshore platform operations with huge daily costs
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[0025] The present invention will be further described below in conjunction with accompanying drawing.
[0026] see figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 , which are respectively the overall structure schematic diagram of the nipple device used for liner running into the well according to the embodiment of the present invention, the structural diagram of the ball seat assembly of the nipple device used for the liner running into the well according to the embodiment of the present invention, and the implementation of the present invention Schematic diagram of the structure of the sliding sleeve assembly of the sub-joint device used for liner entry in the example, the structural diagram of the retaining ring of the sub-joint device for liner entry in the embodiment of the present invention, and the structure diagram of the block ring for the liner entry in the embodiment of the present invention Schematic diagram of the shell assembly structure of the pup...
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The invention relates to a short section device for a tail tube to enter a well. The short section device for the tail tube to enter the well comprises an upper joint assembly, a lower joint assembly, a shell assembly, a slide sleeve assembly, a ball seat assembly and a baffle ring, wherein the upper joint assembly and the lower joint assembly are arranged coaxially; the shell assembly is coaxially arranged between the upper joint assembly and the lower joint assembly; a flow guide hole is formed in the shell assembly; the slide sleeve assembly is inserted in the shell assembly; flow passing holes are formed in the slide sleeve assembly in the peripheral direction; the ball seat assembly is coaxial with the upper joint assembly and is connected with the slide sleeve assembly; the baffle ring can sleeve the peripheral wall of the slide sleeve assembly fixedly and is used for blocking the flow guide hole; and when the ball seat assembly is subjected to an upward acting force in the axial direction, the ball seat assembly drives the slide sleeve assembly and the baffle ring to move upwards together in the axial direction, and therefore, the flow guide hole communicates with the flow passing holes. The short section device has the advantages of reducing pressure to the wall of the well in a tripping-in process of the tail tube.
Description
technical field [0001] The invention relates to the technical field of liner cementing operations, in particular to a nipple device for liner entry into wells. Background technique [0002] At present, deep well deepwater liner cementing operation is a time-consuming and risky on-site operation. How to complete the liner cementing operation safely, efficiently and smoothly is the key to whether the follow-up operation of the oil well can be carried out smoothly. [0003] In the process of deep well deepwater liner running, when the liner passes through the narrow well section, in order to avoid excessive pressure and cause leakage of the formation, it is often necessary to strictly control the running speed of the deep well deepwater liner. At the same time, this periodic grouting operation also seriously slows down the operation process and greatly increases the operation cost, especially for offshore platform operations with huge daily costs. [0004] Based on the above ...
Claims
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IPC IPC(8): E21B23/00E21B34/08
Inventor 李夯郭朝辉张瑞马兰荣冯丽莹阮臣良陈志峰马善坤
Owner CHINA PETROLEUM & CHEM CORP