CN212642629U

CN212642629U - Drillable positioning centralizer

Info

Publication number: CN212642629U
Application number: CN202120246768.2U
Authority: CN
Inventors: 任岩岩; 郭璐; 郭磊; 商延兵; 任全民; 李瑞强
Original assignee: Haita Petroleum Technology Co ltd
Current assignee: Haita Petroleum Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-03-02
Anticipated expiration: 2031-01-29

Abstract

The utility model relates to a drillable location centralizer. The technical scheme is as follows: the upper end and the lower end of the righting body are respectively provided with threads, a plurality of grooves are formed in the circumferential direction of the body of the righting body, a positioning righting block, a spring and an inner lining plate are installed in each groove, the positioning righting block and the inner lining plate are supported through the springs, a boss is arranged outside the positioning righting block, and an upper positioning ring and a lower positioning ring are respectively connected to the upper end and the lower end of the righting body. The beneficial effects are that: the utility model discloses be equipped with the boss on the outer wall of piece is right in the location, and the boss both sides are big inclined plane, perhaps adopt the arc protruding, like this, when boss or arc are protruding when the sleeve pipe coupling junction, well head tensiometer has obvious pulling force change and shows, after the design position is transferred to the tubular column, according to the pulling force change of well head show near the sleeve pipe coupling position degree of depth of confirming to the degree of depth of each position of going into the tubular column under the definite, positioning function has been realized, and simple structure, long service life.

Description

Drillable positioning centralizer

Technical Field

The utility model relates to an oil development field, in particular to drillable location centralizer.

Background

At present, in the oil well exploitation process, the centralizer adopted in an oil field refers to a rigid and elastic centralizing framework arranged on the outer surface of a casing for ensuring that a casing string which is put in is positioned in the center of a shaft in oil and gas drilling, and has the characteristics of simple structure, convenience in use, long service life and relatively low cost, and the existing centralizer has various types, such as: firstly, a rigid centralizer sleeved on an oil casing; secondly, an elastic centralizer for well cementation; and the ball centralizers and the like, wherein the centralizer types have characteristics according to different using well conditions.

For example, chinese patent document No. CN209179704U, entitled "a self-positioning screw drill centralizer", includes a universal shaft, a transmission shaft is connected to a tail end of the universal shaft, a housing is provided on an outer ring of the transmission shaft, a limiting cap is provided at a front end of the housing, a limiting groove is provided on the housing at a lower end of the limiting cap, a rack centralizer is embedded in the limiting groove, a positioning groove is provided at a tail end of the housing, and a positioning ring is screwed on the housing at a rear end of the positioning groove; the rack centralizer is characterized in that a limiting block is arranged at the front end of the rack centralizer, the limiting block is embedded in a limiting groove, the tail end of the rack centralizer extends backwards and is provided with a positioning block, and the positioning block is embedded in a positioning groove and is fixed through a positioning ring; the front end of the rack centralizer is meshed with the surface of the shell of the transmission shaft, the tail end of the rack centralizer is locked by the positioning ring, the position of the rack centralizer can be adjusted according to a bending point line of the universal shaft, and directional deflection of the screw drill is achieved. The utility model discloses be applied to righting of screw rod drilling tool, although disclose the locating piece, its structure is complicated, is not suitable for the oil pipe righting of oil recovery in-process.

The Chinese patent document with the publication number of CN202866682U has the patent name of self-positioning casing centralizer, and comprises a centralizing positioning ring, a plurality of centralizing pieces and a centralizer positioning pin. One end of the righting piece is connected with a righting positioning ring, and a righting device positioning hole is arranged on the righting positioning ring. The centralizer locating hole is a blind hole, and the length of the centralizer locating hole is the same as that of the centralizer locating pin. The centralizer locating pin inserts in the centralizer locating hole, is interference fit between the two. The utility model discloses a be applied to well drilling well cementation, and the structure can not realize the location of distance in the pit.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a drillable location centralizer to the above-mentioned defect that prior art exists, not only having the effect of rightting, can effectual realization location moreover to the position of definite running string.

The utility model provides a drillable location centralizer, its technical scheme is: including righting the body, going up the holding ring, fixing a position and righting piece, spring, interior welt, lower holding ring, righting the body upper and lower extreme both ends and being equipped with the screw respectively, righting the body circumferencial direction of body and being equipped with a plurality of recesses, righting piece, spring and interior welt are right in every recess installation location, the spring-supported is passed through to the piece is right in the location and interior welt, and just fixes a position and right the piece and be equipped with the boss, goes up the holding ring and connects respectively at the upper and lower both ends of righting the body with lower holding ring.

Preferably, four symmetrical grooves are formed in the circumferential direction of the body of the centralizing body, and a positioning centralizing block, a spring and an inner lining plate are sequentially arranged in each groove from outside to inside.

Preferably, the middle part of the positioning and righting block is provided with a boss, and two sides of the boss are of large inclined plane structures; and two ends of the positioning righting block are provided with limiting tables.

Preferably, the lining plate and the positioning and centering block are provided with three groups of circular grooves, springs are respectively arranged in the circular grooves, and the springs are of rectangular spiral cylindrical structures.

Preferably, the upper positioning ring and the lower positioning ring are of annular structures, and the upper positioning ring is connected to the upper end of the righting body and is fixed through a first fixing pin; the lower positioning ring is connected to the lower end of the righting body and fixed through a second fixing pin.

Preferably, the middle part of the positioning and righting block is provided with an arc-shaped bulge, and two ends of the positioning and righting block are provided with limit tables.

The utility model has the advantages that: the utility model discloses a body circumferencial direction at rightting the body is equipped with a plurality of recesses, the piece is right in installation location in every recess, spring and interior welt, the piece is right in the location and interior welt passes through spring-supported, can realize the shrink and the expansion of the piece is right in the location, and be equipped with a boss on the outer wall of the piece is right in the location, and the boss both sides are big inclined plane, or adopt the arc arch, thus, when boss or arc arch when sleeve coupling junction, well head tensile table has obvious pulling force change and shows, after the design position is transferred to the tubular column, near sleeve coupling position depth is confirmed according to the pulling force change display of well head, thereby confirm the degree of depth of each position of going into the tubular column down, positioning function has been realized, moreover, the steam generator is simple in structure, long service life.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the structure A-A of the present invention;

FIG. 3 is a schematic structural diagram of a first embodiment of a localized centralizing block;

FIG. 4 is a schematic structural diagram of a second embodiment of a positioning and centering block;

in the upper diagram: righting body 1, go up holding ring 2, first fixing pin 3, location righting block 4, spring 5, interior welt 6, lower holding ring 7, second fixing pin 8, boss 4.1, spacing platform 4.2, arc arch 4.3.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Embodiment 1, refer to fig. 1, the utility model provides a drillable location centralizer, including right body 1, go up holding ring 2, location righting piece 4, spring 5, interior welt 6, lower holding ring 7, right body 1 upper and lower extreme both ends and be equipped with the screw respectively, right body 1's body circumferencial direction and be equipped with a plurality of recesses, install the location in every recess and right piece 4, spring 5 and interior welt 6, the location is right piece 4 and interior welt 6 and is supported through spring 5, and the location is right piece 4 and is equipped with boss 4.1, goes up holding ring 2 and holds ring 7 and connect respectively at the upper and lower both ends of righting body 1 down.

Wherein, four symmetrical grooves are arranged in the circumferential direction of the body of the centralizing body 1, and a positioning centralizing block 4, a spring 5 and an inner lining plate 6 are sequentially arranged in each groove from outside to inside.

Referring to fig. 3, a boss 4.1 is arranged in the middle of the positioning and centering block 4, and two sides of the boss 4.1 are of large inclined plane structures which are convenient for a casing coupling to pass through; two ends of the positioning and righting block 4 are provided with limiting tables 4.2, and the upper positioning ring 2 and the lower positioning ring 7 are arranged at the positions to realize the radial limiting of the positioning and righting block 4.

Wherein, interior welt 6 and location are right piece 4 and are equipped with three sets of circular grooves, and built-in spring 5 respectively, spring 5 adopts the rectangular spiral cylinder structure, can make location right piece 4 have the function of shrink and expansion.

In addition, the upper positioning ring 2 and the lower positioning ring 7 are of annular structures, and the upper positioning ring 2 is connected to the upper end of the righting body 1 and is fixed through a first fixing pin 3; the lower positioning ring 7 is connected at the lower end of the centralizing body 1 and is fixed by a second fixing pin 8.

Preferably, the centralizing body 1, the upper positioning ring 2, the inner lining plate 6 and the lower positioning ring 7 are all made of easily-drilled materials, so that the later-stage treatment is easy, and the milling difficulty is reduced.

When the utility model is used, four symmetrical grooves are arranged in the circumferential direction of the body of the centralizing body 1, a positioning and centering block 4, a spring 5 and an inner lining plate 6 are arranged in each groove, the positioning and centering block 4 and the inner lining plate 6 are supported by the spring 5, the contraction and expansion of the positioning and centering block 4 can be realized, a boss 4.1 is arranged on the outer wall of the positioning and righting block 4, and two sides of the boss 4.1 are large inclined planes, or the arc-shaped bulge 4.3 is adopted, so when the oil pipe is driven by the device to be put into the well, the boss 4.1 or the arc-shaped bulge 4.3 on the positioning righting block 4 of the utility model passes through the connecting part of the casing coupling, the well mouth tension meter has obvious tension change display, when the pipe column is put down to the designed position, the position depth of the nearby casing coupling is determined according to the tension change of the wellhead, so that the depth of each position of the running string is determined, and the positioning function is realized.

Embodiment 2, the utility model provides a drillable location centralizer, including right body 1, go up holding ring 2, location and right piece 4, spring 5, interior welt 6, lower holding ring 7, right body 1 upper and lower end both ends and be equipped with the screw respectively, right body 1's body circumferencial direction and be equipped with a plurality of recesses, install the location in every recess and right piece 4, spring 5 and interior welt 6, the location is right piece 4 and interior welt 6 and is passed through the support of spring 5, and the location is right piece 4 and is equipped with boss 4.1, goes up holding ring 2 and holds ring 7 down and connect respectively at the upper and lower both ends of right body 1.

The difference from the embodiment 1 is that: referring to fig. 4, the middle of the positioning righting block 4 is provided with an arc-shaped bulge 4.3, and the well mouth tension meter can display obvious tension change when passing through a casing coupling joint, and after the pipe column is lowered to a designed position, the position depth of the casing coupling nearby is determined according to the tension change display of the well mouth, so that the depth of each position of the pipe column to be lowered is determined, and a positioning function is realized.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solutions described above. Therefore, any simple modifications or equivalent changes made according to the technical solution of the present invention belong to the scope of the present invention as far as possible.

Claims

1. A drillable positioning centralizer is characterized in that: including righting body (1), go up holding ring (2), location and right piece (4), spring (5), interior welt (6), lower holding ring (7), righting body (1) upper and lower extreme both ends and being equipped with the screw respectively, the body circumferencial direction of rightting body (1) is equipped with a plurality of recesses, and piece (4), spring (5) and interior welt (6) are right in every recess installation location, the location is right piece (4) and interior welt (6) and is supported through spring (5), and the location is right piece (4) and is equipped with the boss, goes up holding ring (2) and lower holding ring (7) and connects respectively at the upper and lower both ends of righting body (1).

2. The drillable positioning centralizer of claim 1, wherein: four symmetrical grooves are formed in the circumferential direction of the body of the centralizing body (1), and a positioning centralizing block (4), a spring (5) and an inner lining plate (6) are sequentially installed in each groove from outside to inside.

3. A drillable positioning centralizer according to claim 1 or 2, wherein: a boss (4.1) is arranged in the middle of the positioning and righting block (4), and two sides of the boss (4.1) are of large inclined plane structures; and two ends of the positioning righting block (4) are provided with limiting tables (4.2).

4. The drillable positioning centralizer of claim 3, wherein: the inner lining plate (6) and the positioning and righting block (4) are provided with three groups of circular grooves, springs (5) are respectively arranged in the three groups of circular grooves, and the springs (5) are of rectangular spiral cylindrical structures.

5. The drillable positioning centralizer of claim 1, wherein: the upper positioning ring (2) and the lower positioning ring (7) are of annular structures, and the upper positioning ring (2) is connected to the upper end of the righting body (1) and is fixed through a first fixing pin (3); the lower positioning ring (7) is connected to the lower end of the centralizing body (1) and is fixed through a second fixing pin (8).

6. A drillable positioning centralizer according to claim 1 or 2, wherein: the middle part of the positioning righting block (4) is provided with an arc-shaped bulge (4.3), and two ends of the positioning righting block (4) are provided with limit tables (4.2).