Expandable liner drilling device and its operating method
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An operation device and expansion technology, which is applied in drilling equipment and methods, drilling equipment, earth-moving drilling, etc., to reduce the risk of drilling and expansion and ensure safety.
Active Publication Date: 2018-09-11
中石化石油工程技术服务有限公司 +2
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[0005] Aiming at the problems faced by the existing liner drilling, an expandable liner drilling operation device was invented, which organically combines the expandable casing technology with the liner drilling technology, so that the entire drilling operation can be carried out after the liner completes the drilling operation. The liner expansion operation can avoid problems such as differential pressure sticking and drilling fluid loss under complex geological conditions; the invention also relates to a method for implementing the expansion liner drilling operation using the device
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[0028] The invention will be further described now in conjunction with the accompanying drawings.
[0029] Such as figure 1 , figure 2 As shown, an expandable liner drilling operation device involved mainly includes three parts: a liner expansion assembly 101 , a liner connection and activation assembly 102 and a liner drilling assembly 103 .
[0030] The liner drilling assembly 103 is an inner pipe drilling tool protruding from the bottom of the liner to realize the function of liner drilling. It includes a double-centered reaming drill bit 1, a floating hoop 2, a ball seat 3 and the lower part of the sealing central tube 5. The double-centered reaming drill bit 1 is an eccentric drill bit, which can realize the reaming operation while drilling, and is convenient for the liner to run in.
[0031] The liner connection and starting assembly 102 is a connection device between the liner and the drilling assembly, which realizes functions such as connection between the liner a...
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Abstract
The invention relates to an expansive tail pipe drilling operation device and an operation method thereof. The device mainly comprises a tail pipe drilling assembly, a tail pipe connecting and starting assembly and a tail pipe expansion assembly. The tail pipe drilling assembly comprises a dual-core reaming bit, a float collar, a ball seat, a sealed central pipe and the like. The tail pipe connecting and starting assembly is mainly composed of a sealed central pipe, a splined shaft, an expansion cone, a hollow reaming bit, a locking short section, an expansion starter and other parts. The tail pipe expansion assembly is mainly composed of an expansion sleeve, an expansion hanger, an expansion pipe socket, a sealed rubber barrel, a central pipe, a mud blocking device, a pipe socket stop block and the like. By means of the operation device and the operation method, tail pipe expansion operation can be achieved while tail pipe drilling operation is achieved, the inner diameter of a completed well is increased, accordingly, the problems of loss, an unstable borehole and the like are solved, downhole accidents are decreased, the drilling safety is improved, and the drilling cost is reduced.
Description
technical field [0001] The invention relates to the technical field of drilling and completion in the oil and gas industry, in particular to an expandable liner drilling operation device and its operating method, which can realize liner drilling operations and expansion casing expansion operations after drilling in a single trip . Background technique [0002] In traditional oil and gas field drilling operations, the casing operation is carried out after the drilling operation. After the target layer is drilled, it is necessary to perform operations such as short tripping and well drilling to ensure that the casing is run in place smoothly. During the casing running process, there may be complex situations such as blowout and casing string not in place. In order to reduce the downhole complex situation and save the drilling cycle, the casing drilling technology has been developed, which can ensure that the casing is run in while drilling, which can effectively save the dril...
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