Low-resistance rigid casing centralizer

Abstract

The utility model provides a low-resistance rigid casing centralizer, which belongs to the field of drilling equipment and comprises a first arc-shaped plate, a second arc-shaped plate is rotatably arranged at one end of the first arc-shaped plate, and a connecting component is arranged between the first arc-shaped plate and the second arc-shaped plate. A plurality of ribs are arranged on the outer sides of the first arc-shaped plate and the second arc-shaped plate; a plurality of rolling wheel grooves are formed in the outer sides of the ribs, rolling wheels are arranged in the rolling wheel grooves, shaft rods are arranged in the rolling wheels in a penetrating mode, the two ends of each shaft rod extend into the two sides of the corresponding rolling wheel groove to be rotationally arranged, and a plurality of scraping plates are fixedly arranged on the outer sides of the ribs. The rolling wheel groove and the scraping plate are arranged, the rolling wheel can be protected, the rolling wheel is prevented from being clamped by foreign matter such as sand and stone and soil, it is ensured that the working process is not blocked by the rolling wheel, the connecting assembly is further arranged, the device can be rapidly and conveniently mounted and dismounted, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a low-resistance rigid casing centralizer. Background Art

[0002] The casing centralizer is a device installed on the casing string to center the casing string in the wellbore. It is one of the casing accessories and is divided into two types: rigid centralizer and spring centralizer. The casing centralizer has the characteristics of simple structure, easy use, long service life and relatively low cost.

[0003] Most of the roller casing centralizers in the prior art lack protective devices for the rollers. Since there are a large number of foreign objects such as sand, stone, and soil in the wellbore, the rollers are easily stuck by the foreign objects such as sand, stone, and soil during the movement of the roller casing centralizer in the wellbore, causing the rollers to be unable to rotate, thereby increasing the resistance to movement and bringing obstacles to the working process. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a low-resistance rigid casing centralizer.

[0005] The embodiment of the utility model provides a low-resistance rigid casing centralizer, comprising:

[0006] A first curved plate, one end of which is rotatably provided with a second curved plate, a connecting component is provided between the first curved plate and the second curved plate, and a plurality of ribs are provided on the outer sides of the first curved plate and the second curved plate;

[0007] A plurality of roller grooves are arranged on the outer side of the ribs, rolling wheels are arranged in the plurality of roller grooves, shaft rods are arranged through the plurality of rolling wheels, both ends of the plurality of shaft rods are extended into the two sides of the roller grooves for rotation, and a plurality of scrapers are fixedly arranged on the outer side of the ribs.

[0008] Furthermore, the connecting assembly includes a nut, a bolt and a fixing plate. Two support blocks are fixedly arranged in parallel on the outer side of the first arc-shaped plate. Round rods are fixedly arranged at both ends of the nut. The outer ends of the two round rods are respectively rotatably arranged on the inner sides of the two support blocks. The bolts extend into the inner thread of the nut for connection. The fixing plate is fixedly arranged on the second arc-shaped plate, and the fixing plate is arranged in cooperation with the bolts.

[0009] Furthermore, two hinges are fixedly provided at one end of the first arc-shaped plate, and the other ends of the two hinges are fixedly provided at one end of the second arc-shaped plate.

[0010] Furthermore, outer sides of the plurality of ribs are all arranged in an arc surface, and the plurality of ribs are evenly distributed.

[0011] Furthermore, the plurality of rolling wheels are linearly and evenly distributed, and the spacings between the plurality of rolling wheels and the corresponding rolling wheel grooves are matched.

[0012] Furthermore, the plurality of scrapers are all arranged at an inclination, and the plurality of scrapers are arranged to abut against and cooperate with corresponding rolling wheels.

[0013] Furthermore, a slot is provided at the outer end of the fixing plate, and the bolt passes through the slot and is arranged in a matching manner.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Ribs and scrapers are provided to reduce the distance between the rolling wheel and the rolling groove and to scrape the dirt on the rolling wheel by the scraper, thereby preventing sand, dirt and other foreign objects from entering the rolling groove, improving the stability of the rolling wheel and preventing the rolling wheel from getting stuck.

[0016] 2. Nuts and bolts are provided. Loosen the bolts and rotate them through the nuts to separate them from the slots. Then, the first arc plate and the second arc plate can be opened. Remove the device and rotate the bolts through the nuts to insert the bolts into the slots. Then, tighten the bolts. Then, the first arc plate and the second arc plate can be tightened and fixed through the fixing plate. The operation is simple.

[0017] To sum up, the utility model is provided with a roller groove and a scraper, which can protect the rolling wheel and prevent the rolling wheel from being stuck by foreign objects such as sand, stone, and soil, ensuring that the working process is not hindered by the rolling wheel. A connecting component is also provided, which can quickly and conveniently install and disassemble the device for easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of a low-resistance rigid casing centralizer described in an embodiment of the utility model.

[0019] Figure 2 It is a top view of a low resistance rigid casing centralizer described in an embodiment of the utility model.

[0020] Figure 3 A low resistance rigid casing centralizer described in the embodiment of the utility model Figure 1 Enlarged view of point A in the middle.

[0021] Figure 4 It is a cross-sectional view of a rib in a low-resistance rigid casing centralizer described in an embodiment of the utility model.

[0022] In the above drawings: 1 first arc plate, 2 second arc plate, 3 hinge, 4 support block, 5 nut, 6 bolt, 7 fixing plate, 8 slot, 9 rib, 10 roller slot, 11 rolling wheel, 12 shaft rod, 13 scraper. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1-Figure 4 As shown, the embodiment of the utility model provides a low resistance rigid casing centralizer, comprising:

[0025] A first curved plate 1, one end of the first curved plate 1 is rotatably provided with a second curved plate 2, one end of the first curved plate 1 is fixedly provided with two hinges 3, the other ends of the two hinges 3 are fixedly provided at one end of the second curved plate 2, a connecting component is provided between the first curved plate 1 and the second curved plate 2, the outer sides of the first curved plate 1 and the second curved plate 2 are both provided with a plurality of ribs 9, the outer sides of the plurality of ribs 9 are all provided with curved surfaces, and the curved surfaces can reduce resistance, and the plurality of ribs 9 are evenly distributed;

[0026] A plurality of roller grooves 10 are arranged on the outer side of the rib 9, and a rolling wheel 11 is arranged in each of the plurality of roller grooves 10. A shaft 12 is arranged through each of the plurality of rolling wheels 11, and both ends of the plurality of shafts 12 extend into both sides of the roller groove 10 for rotation.

[0027] The plurality of rolling wheels 11 are evenly distributed linearly, and the spacing between the plurality of rolling wheels 11 and the corresponding rolling grooves 10 is matched. The spacing between the rolling wheels 11 and the corresponding rolling grooves 10 is small, which can reduce the sand and stone from entering the rolling grooves 10 to a certain extent, and prevent the rolling wheels 11 from getting stuck, but does not affect the rotation of the rolling wheels 11;

[0028] A plurality of scrapers 13 are fixedly arranged on the outer side of the rib 9. The plurality of scrapers 13 are arranged in an inclined manner. The plurality of scrapers 13 are arranged to abut against and cooperate with the corresponding rolling wheels 11, so as to scrape off the mud on the rolling wheels 11 and prevent the mud from entering the rolling wheel groove 10 and jamming the rolling wheel 11.

[0029] The connecting assembly includes a nut 5, a bolt 6 and a fixing plate 7. Two supporting blocks 4 are fixedly arranged in parallel on the outer side of the first arc-shaped plate 1. Round rods are fixedly arranged at both ends of the nut 5. The outer ends of the two round rods are respectively rotatably arranged on the inner sides of the two supporting blocks 4. The bolt 6 extends into the inner thread of the nut 5 for connection. The fixing plate 7 is fixedly arranged on the second arc-shaped plate 2. The fixing plate 7 is matched with the bolt 6. A clamping groove 8 is arranged at the outer end of the fixing plate 7. The bolt 6 passes through the clamping groove 8 and is matched so that the clamping groove 8 can clamp the top of the bolt 6, so that the first arc-shaped plate 1 and the second arc-shaped plate 2 can be tightened and fixed.

[0030] The detailed working process of the utility model is as follows:

[0031] 1. During installation, the staff first sets the first curved plate 1 and the second curved plate 2 on the sleeve, then rotates the bolt 6 through the nut 5, inserts the bolt 6 into the slot 8, and finally tightens the bolt 6, and tightens and fixes the first curved plate 1 and the second curved plate 2 through the fixing plate 7;

[0032] 2. When disassembling, the staff first loosens the bolt 6, and then rotates the bolt 6 through the nut 5 to separate the bolt 6 from the slot 8, and finally opens the first arc plate 1 and the second arc plate 2 to remove the device.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A low resistance rigid casing centralizer, characterized in that: include: A first curved plate (1), a second curved plate (2) being rotatably disposed at one end of the first curved plate (1), a connecting component being disposed between the first curved plate (1) and the second curved plate (2), and a plurality of ribs (9) being disposed on the outer sides of the first curved plate (1) and the second curved plate (2); A plurality of roller grooves (10) are arranged on the outer side of the rib (9), a rolling wheel (11) is arranged in each of the roller grooves (10), an axle rod (12) is arranged through each of the rolling wheels (11), both ends of the axle rods (12) are extended into both sides of the roller groove (10) and are rotatably arranged, and a plurality of scrapers (13) are fixedly arranged on the outer side of the rib (9).

2. A low resistance rigid casing centralizer according to claim 1, characterized in that: in: The connection assembly comprises a nut (5), a bolt (6) and a fixing plate (7); two supporting blocks (4) are fixedly arranged in parallel on the outer side of the first arc-shaped plate (1); round rods are fixedly arranged at both ends of the nut (5); the outer ends of the two round rods are respectively rotatably arranged on the inner sides of the two supporting blocks (4); the bolt (6) extends into the inner thread of the nut (5) for connection; the fixing plate (7) is fixedly arranged on the second arc-shaped plate (2); and the fixing plate (7) is arranged in cooperation with the bolt (6).

3. A low resistance rigid casing centralizer according to claim 1, characterized in that: in: Two hinges (3) are fixedly arranged at one end of the first arc-shaped plate (1), and the other ends of the two hinges (3) are fixedly arranged at one end of the second arc-shaped plate (2).

4. A low resistance rigid casing centralizer according to claim 1, characterized in that: in: The outer sides of the plurality of ribs (9) are all arranged in an arc surface, and the plurality of ribs (9) are evenly distributed.

5. A low resistance rigid casing centralizer according to claim 1, characterized in that: in: The plurality of rolling wheels (11) are linearly and evenly distributed, and the spacing between the plurality of rolling wheels (11) and the corresponding rolling wheel grooves (10) is arranged in a coordinated manner.

6. A low resistance rigid casing centralizer according to claim 1, characterized in that: in: The plurality of scrapers (13) are all arranged at an angle, and the plurality of scrapers (13) are arranged to abut against and cooperate with the corresponding rolling wheels (11).

7. A low resistance rigid casing centralizer according to claim 2, characterized in that: in: The outer end of the fixing plate (7) is provided with a slot (8), and the bolt (6) passes through the slot (8) and is arranged in a matching manner.

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