A vibration cementing system and method
A cementing and well wall technology, which is used in earth-moving drilling, wellbore/well components, sealing/packing, etc., can solve the problems of weakening the vibration strength of the sealing section, affecting the cementing quality, etc., and reduce additional construction operations. , The construction is simple and easy, and the investment cost is reduced.
Active Publication Date: 2017-09-15
PETROCHINA CO LTD
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Problems solved by technology
Since the middle and upper parts of the casing are far away from the vibration device, these parts are the main targets of the vibration device. Since the hydraulic pulse vibration device is usually installed on the casing near the bottom of the well, the vibration generated by it is transmitted along the casing. During the process, the vibration intensity of the sealing section in the middle and upper part of the casing is weakened, which affects the cementing quality.
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[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0034] See figure 1 . A vibration cementing system, comprising: a casing 13 that can be lowered into a predetermined position in an oil and gas well, and an annular space 15 is formed between the casing 13 and the well wall 11 of the oil and gas well, and the annular space 15 is used for Cement slurry 17 is accommodated, and liquid 19 is accommodated in the casing 13; explosives 21 suspended in the liquid 19, the liquid 19 can transmit the vibration generated when...
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The invention provides a vibrating well cementation system. The system comprises a sleeve and an explosive, wherein the sleeve can be moved down to a preset position in an oil gas well, wherein an annular space is formed between the sleeve and the wall of the oil gas well and is used for accommodating cement paste and liquid which is contained in the sleeve; the explosive is suspended in the liquid; the liquid can be used for transmitting vibration generated when the explosive is detonated to the sleeve and the cement paste. The invention also discloses a method for well cementation by using the vibrating well cementation system. The method comprises the following steps: moving down the sleeve to the preset position in the oil gas well; forming the annular space between the sleeve and the wall of the oil gas well; filling the annular space with the cement paste; filling the sleeve with the liquid; putting the explosive in the liquid; controlling detonation of the explosive. According to the system and the method disclosed by the invention, the detonation of the explosive is used for providing a vibration source; dynamic load generated by the detonation is high in acting force, and the sleeve and the cement paste which is outside the sleeve are more obvious in vibration effect, so the well cementation quality is improved.
Description
technical field [0001] The invention belongs to the technical field of oil and gas development, and in particular relates to a vibration cementing system and method. Background technique [0002] Well cementing is one of the key links in drilling engineering and a quality improvement technology in well completion engineering; cementing quality plays an important role in prolonging the life of oil and gas wells and exerting the productivity of oil and gas wells. [0003] Vibration cementing is to use mechanical vibration, hydraulic pressure or air pulse, hydraulic shock and other means during the process of casing running, ash injection, displacement and waiting to solidify to generate vibration to act on the casing, drilling fluid and cementing fluid to improve the cementing performance. A technology of quality. Practice has proved that vibration can improve the strength of cement stone, reduce the viscosity of drilling fluid, improve the displacement efficiency, eliminate ...
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IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor徐鹏刘新云张国辉
OwnerPETROCHINA CO LTD