CN212743930U

CN212743930U - Slit sand prevention hydraulic anchor

Info

Publication number: CN212743930U
Application number: CN202021664552.XU
Authority: CN
Inventors: 刘�东; 李哲辉; 周德宏; 田径
Original assignee: Yancheng Hiromichi Petroleum Machinery Co ltd
Current assignee: Yancheng Hiromichi Petroleum Machinery Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-03-19
Anticipated expiration: 2030-08-12

Abstract

The utility model discloses a slot sand control hydraulic anchor, including the tubulose anchor body of cover, set up the anchor eye along radially running through the pipe wall hole on the anchor body, be equipped with the fluke along anchor body radial direction removal in the anchor eye, the fluke lower extreme is opened flutedly, the symmetry is provided with the elastic component mounting hole in the recess, install the elastic component in the elastic component mounting hole, annular seal groove has been seted up on the outer peripheral face of fluke, the embedded sealing washer that is equipped with the sealed complex of fluke pore wall of seal groove, the up end bearing surface of fluke, the terminal surface is the occlusal surface under the fluke, be provided with a plurality of bar anchor teeth on the occlusal surface, the outside of anchor eye covers there is the baffle, the baffle passes through the fix with screw on the anchor body, the utility model discloses an elastic component realizes two-stage damped effect for the fluke receives bigger thrust in the initial stage of return, slows down the.

Description

Slit sand prevention hydraulic anchor

Technical Field

The utility model relates to an oil well exploitation field especially relates to a slot sand control hydraulic anchor.

Background

Currently, when stratum fracturing is carried out, a hydraulic anchor is usually adopted for anchoring operation, and displacement of a downhole tool is prevented. Specifically, during operation, the hydraulic anchor fluke extends outwards under the action of liquid pressure through pressure build-up in the oil pipe, so that the inner wall of the casing pipe is clamped, and anchoring action is realized.

The chinese patent document discloses a hydraulic anchor, which is patent No. 201220730518.7, wherein a return spring of the hydraulic anchor is a single cylindrical helical compression spring which is supported between a fluke and a pressure plate, and although the return spring can ensure that the fluke is separated from the inner wall surface of a sleeve under normal conditions, in the actual use process, after the fluke is anchored on the inner wall surface of the sleeve by high-pressure liquid, if the elastic force of the return spring is too small, the fluke is difficult to separate from the inner wall surface of the sleeve; if the elastic force of the return spring is too large, the return spring and the pressing plate are difficult to assemble on the anchor body, so that the hydraulic anchor has the problem that the return of the fluke is unreliable, and normal oil field operation is influenced.

SUMMERY OF THE UTILITY MODEL

According to the not enough of above prior art, the utility model provides a slot sand control hydraulic anchor.

In order to solve the technical problem, the utility model provides a hydraulic anchor, which comprises a sleeve-shaped anchor body, wherein a first pipe thread is arranged on the left side of an inner hole of the anchor body, a second pipe thread is arranged on the circumferential surface on the right side of the anchor body, a plurality of anchor holes which radially penetrate through the inner hole of a pipe wall are arranged on the anchor body, an anchor fluke which moves along the radial direction of the anchor body is assembled in each anchor hole, the anchor fluke is cylindrical, a groove is formed at the lower end of the anchor fluke, an elastic piece mounting hole is symmetrically arranged in each groove, an elastic piece is arranged in each elastic piece mounting hole, each elastic piece comprises a first spring and a second spring, the second spring is sleeved in the first spring, an annular sealing groove is formed in the outer circumferential surface of the anchor fluke, a sealing ring which is hermetically matched with the anchor hole in a embedding manner is arranged in each sealing groove, a bearing surface is arranged on the upper end surface of, the outside in anchor eye covers there is the baffle, and the baffle passes through the fix with screw on the anchor body, and the width and the recess width of baffle suit, first spring top dress is between elastic component mounting hole bottom surface and baffle, when first spring, second spring do not receive pressure, the length of second spring is less than the length of first spring.

Preferably, 10 anchor holes are arranged, and 3 or 2 anchor holes are distributed along the circumferential surface of the anchor body in a staggered manner every 90 degrees.

Preferably, the surface of the fluke is provided with a layer of grease.

Preferably, the surface of the screw is coated with a threaded anaerobic adhesive.

Preferably, when the first spring and the second spring are not pressed, the distance between the lower end surface of the groove and the baffle is 2.98-3.02 MM.

The utility model discloses an gain effect: the utility model provides a pair of hydraulic anchor through the setting of first spring and second spring, realizes the effect of two-stage damping, slows down the speed that the fluke moved outward promptly, accelerates the speed that the fluke moved in, has also slowed down the damage speed of spring simultaneously.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a front view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic view of the fluke structure of the present invention;

in the figure: anchor body 1, first pipe thread 101, second pipe thread 102, screw 2, elastic member 3, first spring 301, second spring 302, baffle 4, fluke 5, sealing washer 501, seal groove 502, elastic member mounting hole 503, anchor teeth 504, occlusal surface 505, pressure bearing surface 506, groove 507, anchor eye 6.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

In this embodiment, as shown in the drawings, the slotting sand control hydraulic anchor provided in this embodiment includes a sleeve-shaped anchor body 1, a first pipe thread 101 is provided on the left side of an inner hole of the anchor body 1, a second pipe thread 102 is provided on the right circumferential surface of the anchor body 1, anchor holes 6 penetrating through the inner hole of the pipe wall in the radial direction are provided on the anchor body 1, 10 anchor holes 6 are provided, 3 or 2 anchor holes are distributed in a staggered manner every 90 degrees along the circumferential surface of the anchor body, flukes 5 guided to move along the radial direction of the anchor body 1 are provided in the anchor holes 6, the flukes 5 are cylindrical, the lower ends of the flukes 5 are provided with grooves 507, elastic member mounting holes 503 are symmetrically provided in the grooves 507, elastic members 3 are mounted in the elastic member mounting holes 503, the elastic members 3 include a first spring 301 and a second spring 302, the second spring 302 is sleeved in the first spring 301, an annular sealing groove 502 is provided on the outer circumferential surface of the flukes 5, a sealing ring 501 is embedded in the sealing, the upper end face bearing surface 506 of fluke 5, the terminal surface is occlusal surface 505 under the fluke 5, is provided with a plurality of bar-shaped anchor teeth 504 on the occlusal surface 505, the outside of anchor eye 6 covers there is baffle 4, and baffle 4 passes through screw 2 to be fixed on anchor body 1, and the width of baffle 4 suits with recess 507 width, first spring 301 top dress is between elastic component mounting hole 503 bottom surface and baffle 4, when first spring 301, second spring 302 do not receive pressure, the length of second spring 302 is less than the length of first spring 301.

Further, the surface of the fluke 5 is provided with a layer of grease to avoid crushing the sealing ring during installation.

Further, the screw 2 is coated with thread anaerobic adhesive to be screwed tightly, so that liquid in the sleeve is prevented from entering the anchor body 1 from the screw fixing position.

In use, after the lumen of anchor body 1 is filled with high pressure fluid, the high pressure fluid will act on pressure bearing face 506 of fluke 5 to cause fluke 5 to move outwardly under the urging of the high pressure fluid against the resilient forces of first spring 301 and second spring 302, and during outward movement of fluke 5, as first spring 301 begins to be compressed, second spring 302 is disengaged from barrier 4 or fluke 5, at which point only first spring 301 will apply a damping force to fluke 5 resisting its outward movement, and as first spring 301 continues to be compressed, second spring 302 will be clamped between fluke 5 and barrier 4 and will be progressively compressed as fluke 5 moves outwardly, at which point second spring 302 and first spring 301 will apply together a damping force to fluke 5 resisting its outward movement until the teeth of fluke 5 are anchored to the inner wall surface of the casing; when the high pressure fluid in anchor body 1 is released, fluke 5 will be pushed inwards by first spring 301 and second spring 302 together and return to the initial position, during which fluke 5 will be subjected to the spring force exerted by first spring 301 and second spring 302 together as fluke 5 starts to move inwards, and as fluke 5 moves inwards, second spring 302 will gradually disengage from fluke 5 until fluke 5 is pushed inwards by first spring 301 completely at a later stage, thereby reducing the load experienced and slowing down the rate of damage to the spring.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a slot sand control hydraulic anchor which characterized in that: the anchor comprises a sleeve-shaped anchor body (1), wherein a first pipe thread (101) is arranged on the left side of an inner hole of the anchor body (1), a second pipe thread (102) is arranged on the circumferential surface of the right side of the anchor body (1), an anchor hole (6) penetrating through the inner hole of a pipe wall along the radial direction is formed in the anchor body (1), a plurality of anchor holes (6) are arranged, an anchor claw (5) moving along the radial direction of the anchor body (1) is assembled in each anchor hole (6), the anchor claw (5) is cylindrical, a groove (507) is formed in the lower end of the anchor claw (5), elastic piece mounting holes (503) are symmetrically formed in each groove (507), an elastic piece (3) is installed in each elastic piece mounting hole (503), each elastic piece (3) comprises a first spring (301) and a second spring (302), the second spring (302) is sleeved in the first spring (301), an annular sealing groove (502) is formed in the outer circumferential surface of each anchor claw (5), and a sealing ring (501) hermetically matched with the hole wall of each, the upper end face bearing surface (506) of fluke (5), terminal surface are occlusal surface (505) under fluke (5), are provided with a plurality of bar shape anchor teeth (504) on occlusal surface (505), the outside of anchor eye (6) covers there is baffle (4), and baffle (4) are fixed on anchor body (1) through screw (2), and the width of baffle (4) suits with recess (507) width, first spring (301) top dress is between elastic component mounting hole (503) bottom surface and baffle (4), when first spring (301), second spring (302) do not receive pressure, the length of second spring (302) is less than the length of first spring (301).

2. The slotted sand control hydraulic anchor of claim 1, wherein: the number of the anchor holes (6) is 10, and the anchor holes (6) are distributed in a staggered mode at intervals of 3 or 2 along the circumferential surface of the anchor body (1) at 90 degrees.

3. The slotted sand control hydraulic anchor of claim 1, wherein: and a layer of butter is arranged on the surface of the fluke (5).

4. The slotted sand control hydraulic anchor of claim 1, wherein: the surface of the screw (2) is coated with thread anaerobic adhesive.

5. The slotted sand control hydraulic anchor of claim 1, wherein: when the first spring (301) and the second spring (302) are not pressed, the distance between the lower end face of the groove (507) and the baffle (4) is 2.98-3.02 MM.