CN211038539U

CN211038539U - Casing centralizer

Info

Publication number: CN211038539U
Application number: CN201921815794.1U
Authority: CN
Inventors: 陈必权; 蔡旭梅; 王利斌; 王琼; 何万通; 吕宇
Original assignee: China Coal Zhejiang Survey And Design Co ltd
Current assignee: China Coal Zhejiang Survey And Design Co ltd
Priority date: 2019-10-26
Filing date: 2019-10-26
Publication date: 2020-07-17
Anticipated expiration: 2029-10-26

Abstract

The utility model discloses a sleeve pipe centralizer, it cup joints to be fixed outside the sleeve pipe, including sleeve and the clamp of setting at the sleeve both ends, the clamp surrounds at telescopic both ends, the sleeve is including articulating in proper order, and can dismantle the connecting plate of connection, be provided with the bow reed on the connecting plate. The utility model discloses have the sleeve pipe that can be used to different pipe diameters, application scope is bigger effect.

Description

Casing centralizer

Technical Field

The utility model relates to a drilling exploration appurtenance especially relates to a sleeve pipe centralizer.

Background

In drilling operations, cementing is required, which involves casing and cementing, with the centering of the casing being the determining factor for cementing. Casing centralizer is usually used to make the casing well-centered when setting the casing pipe, and at large displacement well casing pipe in-process, the casing centralizer of certain quantity need be installed, and at present, the casing centralizer that uses more is elastic casing centralizer.

At present, a chinese patent document with an authorization publication number of CN206071481U discloses an elastic casing centralizer, which comprises two lantern rings and a plurality of bow reeds connected with the two lantern rings, wherein the bow reeds are provided with centralizing blocks used for contacting with the well wall when the casing is lowered, and the friction coefficient of the centralizing blocks is smaller than that of the bow reeds, so that the friction resistance generated by contacting with the well wall when the casing is lowered can be reduced, and the casing can be lowered to the designed well depth. The width of the righting block is larger than that of the bow reed, and the righting block is used for contacting with a well wall surface when a casing is put, so that the centering degree of the casing is ensured, and the well cementation quality is improved. The middle part of the bow reed is a straight strip, and the centering block is provided with a plane corresponding to the middle part of the bow reed, so that the installation is convenient. The centering blocks on every two bow reeds are integrally formed, six bow reeds contact the well wall to form three centering blocks to contact the well wall, and the stress is more consistent with the three-force balance convergence theorem in mechanics, so that the bearing capacity on the casing is more balanced.

However, this prior art can only be applied to a sleeve of a specific pipe diameter, and therefore its application range is small.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sleeve pipe centralizer, its advantage lies in can use in the sleeve pipe of different pipe diameters, and application scope is bigger.

The technical purpose of the utility model is realized through following technical scheme: the utility model provides a sleeve pipe centralizer cup joints to be fixed outside the sleeve pipe, includes the sleeve and sets up the clamp at the sleeve both ends, the clamp surrounds at telescopic both ends, the sleeve is including articulated in proper order, and can dismantle the connecting plate of connection, be provided with the bow reed on the connecting plate.

Through adopting above-mentioned technical scheme, when using this centralizer, because the sleeve is articulated each other and can dismantle the connecting plate of connection and constitute, consequently enclose the sleeve pipe outside the sleeve pipe earlier, then surround the back outside the sleeve pipe at the sleeve pipe, utilize the clamp to surround the sleeve pipe then fix the sleeve pipe outside the sleeve pipe, can realize that this centralizer is fixed outside the sleeve pipe. Because the connecting plates are detachably connected with each other, the sleeve consisting of the connecting plates in different quantities is formed by assembling according to different outer diameters of the sleeve, so that the application range of the centralizer is widened.

The utility model discloses further set up to: the connecting plate is rectangular plate spare, and adjacent connecting plate is articulated in the both ends of its width, the interval is provided with two outer connecting blocks on connecting plate width direction one end terminal surface, and the interval is provided with two inner connecting blocks on connecting plate width direction's the other end terminal surface, and two inner connecting blocks are compared and are more close to the middle part of connecting plate in outer connecting block, and when adjacent connecting plate is connected, two inner connecting blocks are located between two outer connecting blocks, outer connecting block passes through bolt spare with inner connecting block and articulates.

Through adopting above-mentioned technical scheme, two in-connection piece and two outer connecting block cooperations and realize dismantling to be connected and articulated through bolt spare, the quantity of required connecting plate is confirmed to the sleeve pipe external diameter as required, then can realize being connected between the adjacent connecting plate through dismantling bolt spare.

The utility model discloses further set up to: all be provided with the connecting hole on inner connecting block and the outer connecting block, the connecting hole runs through the setting along the length direction of connecting plate, all wear to be equipped with a hinge bolt in the connecting hole, and the spiro union has the nut after hinge bolt one end is worn out the connecting hole.

By adopting the technical scheme, one hinge bolt penetrates through all the connecting holes between the two adjacent connecting plates, and then the hinge bolt is screwed at one end of the hinge bolt penetrating through the connecting holes to realize the connection of the two adjacent connecting plates.

The utility model discloses further set up to: the both ends of connecting plate all set up the spread groove, the width direction along the connecting plate runs through the setting in the spread groove, the clamp is arranged in the spread groove, the spread groove is compared in the middle part that the in-connection piece is closer to the connecting plate.

Through adopting above-mentioned technical scheme, the clamp is with the sleeve pipe ligature in the connecting groove, because the clamp is located the connecting groove, therefore the displacement of clamp on sleeve length direction is restricted, and the clamp is difficult to drop from the sleeve pipe, so this centralizer can be more firm fix on the sleeve pipe. Furthermore, the presence of the attachment slot enables the clamp band to be referenced to a certain position on the sleeve.

The utility model discloses further set up to: sharp reinforcing bulges are distributed on the inner side of the connecting plate.

By adopting the technical scheme, when the sleeve is surrounded on the sleeve, the sharp reinforcing protrusions are in contact with the surface of the sleeve and slightly penetrate into the surface of the sleeve, so that the sleeve is in firmer contact with the surface of the sleeve, and the sleeve are more difficult to generate relative displacement.

The utility model discloses further set up to: the connecting plate is an arc-shaped plate.

Through adopting above-mentioned technical scheme, the arc corresponds with sleeve pipe surface cambered surface, can make the sleeve can be more the laminating surround the sleeve pipe.

The utility model discloses further set up to: the both ends of connecting plate all are provided with an installation piece, bow reed demountable connection is in the installation piece.

By adopting the technical scheme, the bow spring plates do not need to be arranged on each connecting plate, so that the number of the bow spring plates can be determined according to the number of the connecting plates in the sleeve, for example, the bow spring plates are arranged at intervals of one or two connecting plates.

The utility model discloses further set up to: the installation piece is provided with a fixed slot on the relative one end terminal surface of two installation pieces on the connecting plate, the installation piece is kept away from one of connecting plate and is served and be provided with fixed screw, fixed screw and fixed slot intercommunication, the both ends of bow reed stretch into in the fixed slot that corresponds, the one end that the bow reed is located the fixed slot is provided with the registration hole, the spiro union has the fixing bolt who penetrates the registration hole in the fixed screw.

Through adopting above-mentioned technical scheme, when needing to install the bow reed on the connecting plate, insert the one end of bow reed to the fixed slot in to make the position matching hole correspond the intercommunication with fixed screw, then the spiro union one piece stretches into the fixing bolt in the position matching hole in fixed screw, can install the bow reed on the connecting plate. Otherwise, the bow spring plate can be detached from the connecting plate.

To sum up, the utility model discloses following beneficial effect has:

1. the connecting plates are detachably connected with each other, so that sleeves formed by different numbers of connecting plates are assembled according to different outer diameters of the sleeves, and the application range of the centralizer is widened;

2. the clamp is banded with the sleeve pipe in the connecting groove, because the clamp is arranged in the connecting groove, so the displacement of the clamp in the length direction of the sleeve is limited, the clamp is difficult to fall off from the sleeve pipe, and the centralizer can be fixed on the sleeve pipe more stably. Furthermore, the presence of the attachment slot enables the clamp band to be referenced to a certain position on the sleeve;

3. since it is not necessary to mount the bow spring on each of the connecting plates, the number of bow springs can be determined according to the number of connecting plates in the sleeve, for example, by spacing one or two connecting plates apart.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the connection structure between two connection plates and the installation structure of the bow spring.

Reference numerals: 1. a sleeve; 2. clamping a hoop; 3. a connecting plate; 4. a bow spring plate; 5. an outer connecting block; 6. an inner connection block; 7. connecting holes; 8. a hinge bolt; 9. a nut; 10. mounting blocks; 11. fixing grooves; 12. fixing screw holes; 13. a registration hole; 14. fixing the bolt; 15. connecting grooves; 16. reinforcing the protrusion; 17. locking the bolt; 18. a belt body; 19. and (4) holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, for the utility model discloses a sleeve pipe centralizer cup joints and fixes outside the sleeve pipe, including sleeve 1 and the clamp 2 of setting at sleeve 1 both ends, clamp 2 surrounds at sleeve 1's both ends, and sleeve 1 is provided with bow reed 4 including articulated in proper order, and can dismantle the connecting plate 3 of connection on connecting plate 3.

As shown in fig. 1 and 2, the connecting plates 3 are strip-shaped members having a certain arc shape, and the adjacent connecting plates 3 are hinged at both ends of the width thereof. Specifically, two spaced outer connecting blocks 5 are integrally formed on one end surface of the connecting plate 3 in the width direction, and two spaced inner connecting blocks 6 are integrally formed on the other end surface of the connecting plate 3 in the width direction. Two internal connection piece 6 compare in external connection piece 5 middle part that is closer to connecting plate 3, and when adjacent connecting plate 3 connected, two internal connection piece 6 were located between two external connection piece 5.

All be provided with connecting hole 7 on inner connecting block 6 and the outer connecting block 5, connecting hole 7 runs through the setting along the length direction of connecting plate 3, wears to be equipped with a hinge bolt 8 in all connecting holes 7 between two connecting plates 3, and the spiro union has nut 9 after connecting hole 7 is worn out to hinge bolt 8 one end. Therefore, a certain number of connecting plates 3 can be connected by using the hinge bolts 8 and the nuts 9 as required, so that the sleeve 1 can be used with sleeves of different outer diameters.

As shown in fig. 1 and 2, two ends of each connecting plate 3 are fixed with a mounting block 10, the mounting block 10 is closer to the middle of the connecting plate 3 than the inner connecting block 6, and the mounting blocks 10 are detachably connected with two ends of the bow spring piece 4. A fixed slot 11 has all been seted up on the relative one end terminal surface of two installation pieces 10 on same connecting plate 3, installation piece 10 keeps away from connecting plate 3 one serve offer with fixed slot 11 intercommunication fixed screw 12, bow reed 4's both ends all begin to have a registration hole 13, bow reed 4's both ends stretch into corresponding fixed slot 11 in the time, registration hole 13 corresponds with fixed screw 12, the spiro union has the fixing bolt 14 that penetrates registration hole 13 in fixed screw 12.

Because the connecting plates 3 with different quantities are required according to the sleeves with different pipe diameters, but each connecting plate 3 is not provided with one bow reed 4, the bow reeds 4 are detachably connected on the connecting plates 3. Through such setting, can be selective interval one or many connecting plates 3 just set up a bow reed 4 to realize rationally allotting bow reed 4, reduce extravagantly.

As shown in fig. 1 and 2, a connecting groove 15 is formed at each end of each connecting plate 3, the connecting groove 15 is located between the mounting block 10 and the inner connecting block 6, and the connecting groove 15 is disposed along the width direction of the connecting plate 3, so that a ring groove is formed at each end of the sleeve 1 through the connecting groove 15. The clamp 2 ligature is in the connecting groove 15, because the clamp 2 is located connecting groove 15, so the displacement of clamp 2 on sleeve 1 length direction is restricted, and clamp 2 is difficult to drop from the sleeve pipe, so this centralizer can be more firm fix on the sleeve pipe. Furthermore, the presence of the attachment slot 15 enables the clamp band 2 to be referenced to a certain position on the sleeve.

In addition, sharp reinforcing protrusions 16 are distributed on the inner side of the connecting plate 3, when the sleeve 1 is wrapped on the sleeve, the sharp reinforcing protrusions 16 are contacted with the surface of the sleeve and slightly penetrate the surface of the sleeve, so that the sleeve 1 is contacted with the surface of the sleeve more firmly, and the sleeve 1 and the sleeve are more difficult to generate relative displacement.

The implementation principle of the embodiment is as follows: according to the external diameter requirement of the target casing, a certain number of connecting plates 3 are detachably connected, and then a certain number of bow spring blades 4 are detachably connected on the connecting plates 3. The sleeve 1 is then enclosed outside the sleeve and the band 2 is bound in the connecting slot 15.

As shown in fig. 1 and 2, the hoop 2 is a commercially available hose clamp, one end of the hose clamp is rotatably connected with a locking bolt 17, the locking bolt 17 is matched with a hole 19 on a belt body 18 of the hoop 2, and the belt body 18 can be driven to contract in the process of rotating the locking bolt 17, so that the hoop 2 is fixed on the sleeve 1. After the clamp 2 is locked, the locking bolt 17 is then welded to be fixed against rotation. Therefore, the centralizer is stably fixed outside the casing, and the casing can be placed in the drill hole after the centralizer is arranged.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a sleeve pipe centralizer, cup joints and fixes outside the sleeve pipe, characterized by: including sleeve (1) and clamp (2) of setting at sleeve (1) both ends, clamp (2) surround the both ends at sleeve (1), sleeve (1) is including articulated in proper order, and can dismantle connecting plate (3) of connection, be provided with bow reed (4) on connecting plate (3).

2. A casing centraliser as claimed in claim 1, wherein: connecting plate (3) are rectangular plate, and adjacent connecting plate (3) are articulated in the both ends of its width, the interval is provided with two outer joint blocks (5) on connecting plate (3) width direction one end terminal surface, and the interval is provided with two inner joint block (6) on connecting plate (3) width direction's the other end terminal surface, and two inner joint block (6) are compared in outer joint block (5) and are more close to the middle part of connecting plate (3), and when adjacent connecting plate (3) are connected, two inner joint block (6) are located between two outer joint block (5), outer joint block (5) are articulated through bolt spare with inner joint block (6).

3. A casing centraliser as claimed in claim 2, wherein: all be provided with connecting hole (7) on in connecting block (6) and outer connecting block (5), connecting hole (7) run through the setting along the length direction of connecting plate (3), all wear to be equipped with a articulated bolt (8) in connecting hole (7), and the spiro union has nut (9) after connecting hole (7) is worn out to articulated bolt (8) one end.

4. A casing centraliser as claimed in claim 2, wherein: the both ends of connecting plate (3) all set up spread groove (15), the width direction along connecting plate (3) runs through the setting in spread groove (15), clamp (2) are arranged in spread groove (15), spread groove (15) are compared in the middle part that inner connection piece (6) are more close to connecting plate (3).

5. A casing centraliser as claimed in claim 2, wherein: sharp reinforcing bulges (16) are distributed on the inner side of the connecting plate (3).

6. A casing centraliser as claimed in claim 5, wherein: the connecting plate (3) is an arc-shaped plate.

7. A casing centraliser as claimed in claim 2, wherein: the two ends of the connecting plate (3) are provided with mounting blocks (10), and the bow reed (4) is detachably connected to the mounting blocks (10).

8. A casing centraliser as claimed in claim 7, wherein: it is same all be provided with a fixed slot (11) on two relative one end terminal surfaces of installation piece (10) on connecting plate (3), installation piece (10) are kept away from one of connecting plate (3) and are served and be provided with fixed screw (12), fixed screw (12) and fixed slot (11) intercommunication, the both ends of bow reed (4) stretch into corresponding fixed slot (11) in, the one end that bow reed (4) are located fixed slot (11) is provided with registration hole (13), spiro union has fixing bolt (14) that penetrate registration hole (13) in fixed screw (12).