One-way hydraulic drilling-free graded cementing device
A hydraulic, one-way technology, applied in the direction of wellbore/well valve device, earthwork drilling, wellbore/well components, etc., it can solve the problem that the cementing cannot achieve the predetermined effect, the temperature difference between the upper and lower sides of the well depth is large, and the cementing device cannot Meet the use requirements and other issues
Active Publication Date: 2018-01-30
盐城市楚江石油机械制造有限公司
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Problems solved by technology
[0002] The cementing device is the key part of well cementing. It is mainly used in the cementing process to reduce the difficulty of one-time cementing and the excessive liquid column pressure that the formation cannot bear. Due to the large temperature difference between the upper and lower sides of the well depth, cement ash is injected into the well during the well cementing process. It is not easy to adjust during the process, and the cementing cannot achieve the expected effect
Due to the increasingly higher requirements for environmental protection and stricter cost control in the middle and later stages of oilfield development, the requirements for cementing devices are also getting higher and higher. The existing cementing devices can no longer meet the requirements for use. Therefore, it is urgent to design a new type of cementing device
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[0013] The specific content of the present invention will be described in detail below with reference to the drawings and specific embodiments.
[0014] Such as figure 1 As shown, the one-way hydraulic drilling-free graded cementing device includes: a central casing body 1, a rotary centralizer 2 is arranged outside the lower end of the central casing body 1, and at the center of the lower end of the rotary centralizer 2 The outer side of the sleeve body 1 is provided with a rotating centralizer limit sleeve 3 and a limit screw 4, and a sliding sleeve 5 and a ash injection cap 6 are provided on the outside of the middle of the central sleeve body 1. A sliding sleeve limiting convex ring 7 is provided on the outer side of the upper central sleeve body 1, and a sliding sleeve shear nail 8 is provided between the sliding sleeve 5 and the central sleeve body 1. A sliding sleeve moving pin 9 is provided on the central sleeve body 1, and a moving groove 10 that cooperates with the slid...
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The invention discloses a unidirectional hydraulic drilling-free fractional well cementing device which is reliable in quality and consistent with an environmental protection requirement. The device comprises a central casing body, wherein a rotary centralizing body is arranged on the outer side of the lower end of the central casing body; a rotary centralizing body limiting sleeve and limiting screws are arranged on the outer side of the central casing body at the lower end of the rotary centralizing body; a sliding sleeve and a cement injecting cap are arranged on the outer side of the middle of the central casing body; a sliding sleeve limiting convex ring is arranged on the outer side of the central casing body at the upper end of the sliding sleeve; sliding sleeve shear pins are arranged between the sliding sleeve and the central casing body; sliding sleeve movement pins are arranged on the sliding sleeve; movement grooves matched with the sliding sleeve movement pins are formed in the central casing body; opening pins are arranged between the cement injecting cap and the sliding sleeve.
Description
Technical field [0001] The invention relates to a cementing equipment, in particular to a one-way hydraulic drilling-free hierarchical cementing device. Background technique [0002] Cementing device is a key part of cementing. It is mainly used in the cementing process to reduce the difficulty of one-time cementing and the excessive liquid column pressure that the formation cannot withstand. Due to the large temperature difference between the top and bottom of the well depth, cement ash is injected during cementing. It is not easy to adjust during the process, and cementing cannot achieve the predetermined effect. As the requirements for environmental protection in the middle and late stages of oilfield development are getting higher and higher, and the cost control is getting stricter, the requirements for cementing devices are also getting higher and higher. The existing cementing devices can no longer meet the requirements. Therefore, it is urgent to design a new type of cem...
Claims
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IPC IPC(8): E21B33/13E21B34/06E21B34/10
CPCE21B33/13E21B34/06E21B34/10E21B2200/04E21B2200/06
Inventor 吴江
Owner 盐城市楚江石油机械制造有限公司