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A prestressed multi-stage ground anchor and its application method

A technology of prestressing and ground anchoring, which is applied to drilling equipment and methods, earthwork drilling, wellbore/well components, etc., and can solve the problem of reducing the success rate of prestressed cementing, affecting the firmness of casing fixing, and reducing the cementing rate. Quality and other issues, to achieve the effect of improving the pre-fixation effect, improving the anchoring effect, and high filling efficiency

Active Publication Date: 2021-06-22
DONGYING XIN HUALIAN PETROLEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the process of prestressed cementing, the ground anchor is used as a cementing tool, and its working state has a certain impact on the quality of prestressed cementing. When the ground anchor cannot be firmly anchored in the well wall, it will affect the casing. Fixation firmness in the well, once the casing cannot be firmly installed in the well, it will reduce the quality of cementing, reduce the success rate of prestressed cementing, and thus increase the risk of casing loss

Method used

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  • A prestressed multi-stage ground anchor and its application method
  • A prestressed multi-stage ground anchor and its application method
  • A prestressed multi-stage ground anchor and its application method

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specific Embodiment approach

[0078] It should be noted that the structure, proportion, size, etc., which are illustrated in the accompanying drawings of the specification, are only used in conjunction with the description, and those who are familiar with this technique are not intended to limit the invention. The defined conditions, the modification of any structure, the change or size of the proportional relationship or the size of the proportional relationship, without affecting the efficacy of the present invention, and the technical content of the present invention can be covered by the present invention. In the range.

[0079] At the same time, such as "upper", "" "," left "," right "," middle "," ",", ",", ",", ",", ",", "," The invention can be implemented, and the relative relationship changes or adjustments are also considered to be implemented by the present invention as in substantial change in technical content.

Embodiment 1

[0081] Such as Figure 1-6 As shown, the present embodiment provides a prestressed multi-stage anchor, including axial connection and a first anchor 1 and the second anchor 2 of relatively rotating;

[0082] The first anchor 1 includes a housing 11 of a tip open, and a slider 13 having two end openings and a first anchor mechanism 14 hinged to the slider 13, the slider 13 can slide axially and pushed the first anchor 14 to be radially anchored; the casing 11 is provided with a first connecting seat 12;

[0083] The second anchor 2 includes a second connecting seat 21, a drive mechanism 22, a second anchor mechanism 24, and a fixed base 25, and one end of the drive mechanism 22 rotatably couples the second connecting seat 21 and the other end connection. The first connecting seat 12, the drive mechanism 22 is radially anchored by a rotary driving of the second anchor mechanism 24, and the fixed base 25 is provided with a spinal hose portion 251 anchored to the ground.

[0084] When ...

Embodiment 2

[0111] This embodiment provides a prestressed multi-stage anchor, wherein the first anchor 1 is the same as that of the first embodiment, and the second anchor 2 uses another technical solution to realize the second anchor 2 in the drive mechanism 22. The second connecting seat 21 in the second anchor 2, the second connecting seat 21, the drive mechanism 22, and the fixed base 25 in the second anchor 2 are the same, and will not be described later.

[0112] The lower end surface of the second connecting seat 21 is fixed with a second restricted block 26, and the lower end surface of the second restricted block 26 is fixed to the upper end surface of the fixed base 25, the rotary disk 221 The end surface is equivalent to the radially extending second push rod 27, and the second push rod 27 is provided with a third limit block 271 in its longitudinal direction.

[0113] The second anchor mechanism 24 includes a plurality of new moon-shaped second anchor claws 242 and a first push ro...

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Abstract

The invention relates to the technical field of petroleum exploitation, in particular to a prestressed multi-stage ground anchor and a method for using the same. The first anchor body comprises a casing with an open top, a sliding cylinder and a first anchor claw mechanism hinged with the sliding cylinder are arranged in the casing, and the sliding cylinder can slide axially and push the first anchor claw mechanism radial anchoring; the bottom of the casing is provided with a first connection seat; the second anchor body includes a second connection seat, a driving mechanism, a second anchor claw mechanism and a fixed base, and one end of the driving mechanism is rotatably connected to the The second connecting seat is connected to the first connecting seat at the other end, the driving mechanism is radially anchored by rotationally driving the second anchor claw mechanism, and the bottom of the fixed base is provided with a spiked portion that can be anchored into the ground . The prestressed multi-stage ground anchor provided by the invention has more stable anchoring, large overflow of cementing mud, high filling efficiency and more sufficient prestressed pulling.

Description

Technical field [0001] The present invention relates to the field of petroleum mining, and more particularly to a prestressed multi-stage anchor and a method of use. Background technique [0002] Heavy oil (heavy crude oil) refers to the degassed crude oil viscosity at the primitive reservoir of 10000 MPas or at 15.6 ° C and atmospheric pressure under the density of 0.9340 ~ 1.0000G / cm. 3 Since the thick oil viscosity is high, hot absorption is usually carried out by a method of injection 300 ° C or more, thereby increasing the yield of the thick oil well. Due to the effect of high temperature steam, the inner casing is elongated, and the sleeve is smashed, so that the cement ring between the sleeve and the well wall is damaged, which seriously affects the production life of the oil well. In order to solve the above problems, domestic and foreign thick oils generally use the prestressed solid well, the pre-stressed solid is to apply a certain strength to the sleeve, so that the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/01E21B7/20E21B33/13
CPCE21B7/20E21B23/01E21B33/13
Inventor 魏学成张斌张晓磊李振华李佃波张天保
Owner DONGYING XIN HUALIAN PETROLEUM MACHINERY
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