Fixing and adjusting device and method for oil well casing
A technology of oil well casing and adjustment device, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., and can solve problems such as bolt connection loosening, hanger leaving the annular space, and fastening device losing its fixing effect, etc. question
Active Publication Date: 2021-08-06
PETROCHINA CO LTD
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Problems solved by technology
[0004] However, as the surface continues to subside or the tubing is lifted up and down during workover operations, the bolted connection between the surface casing flange and the outer sleeve may be loosened, and the fastening device loses the connection between the oil well casing and the wellhead. The relative fixation between the casing spools, when the surface continues to sink, the production casing follows the inner casing and moves up, causing the hanger to break away from the annular space, and the production casing loses the support of the hanger relative to the surface casing Deflection occurs, if not adjusted in time, it will break due to stretching deformation
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[0030] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.
[0031] An embodiment of the present disclosure provides a fixing and adjusting device for an oil well casing. figure 1 It is a structural schematic diagram of an oil well casing fixing and adjusting device provided by an embodiment of the present disclosure. like figure 1 As shown, the fixing and adjusting device of the oil well casing includes a base cylinder 1 and a sleeve 2 . One end of the base cylinder 1 has a flange 11 coaxially connected with the base cylinder 1 . The sleeve 2 includes two butted inner semi-circles 21, and the two inner semi-circles have matching first fixing ears 23 thereon.
[0032] figure 2 It is a partial structural schematic diagram of an oil well casing fixing and adjusting device provided by an e...
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The invention provides a fixing and adjusting device and method for an oil well casing, and belongs to the technical field of oil field equipment. The fixing and adjusting device for the oil well casing comprises a base cylinder and a sleeve, wherein internal threads are arranged on the inner wall of the base cylinder, a flange plate coaxially connected with the base cylinder is arranged at one end of the base cylinder, the sleeve comprises two inner semicircular cylinders which are in butt joint, each inner semicircular cylinder comprises a first end and a second end which are opposite, each first end is provided with a supporting structure used for supporting a casing pipe four-way joint, the two inner semicircular cylinders are provided with first fixing lugs matched with each other, the outer walls of the second ends of the two inner semicircular cylinders are provided with outer threads matched with the inner threads, and the second ends of the sleeve are connected with the other end of the base cylinder through the external threads and the internal threads. The fixing and adjusting device of the oil well casing can prevent the production casing from being broken due to tensile deformation.
Description
technical field [0001] The present disclosure relates to the technical field of oilfield equipment, in particular to a fixing and adjusting device and an adjusting method for an oil well casing. Background technique [0002] Oil well casing is a steel pipe used to support the well wall of oil and gas wells to ensure the normal operation of the entire oil well during the drilling process and after completion. Oil well casing usually includes surface casing and production casing sleeved inside the surface casing, wherein the upper end of the production casing is provided with a flange to connect with the casing cross on the wellhead pumping unit. During the production process of the oilfield, affected by the subsidence of the surface, the surface casing will sink together with the surface, resulting in the upward channeling of the production casing relative to the surface casing. The hanger that is fixedly connected with the production casing and is used to isolate and suppor...
Claims
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IPC IPC(8): E21B33/047
CPCE21B33/047
Inventor 李明闻伟刘若兮刘清源张同响赵东李京东
Owner PETROCHINA CO LTD