Hydraulic centralizer

Abstract

The utility model relates to the technical field of petroleum processing, and discloses a hydraulic centralizer, which comprises an upper cross beam and a lower cross beam, the upper cross beam and the lower cross beam are hollow cylinders with the same size, an inner sleeve is fixedly connected between the upper cross beam and the lower cross beam, and an outer sleeve is fixedly connected between the upper cross beam and the lower cross beam. The petroleum processing tool is characterized in that six arc-shaped frameworks which are vertically symmetrical in shape and are distributed in a circumferential array mode are fixedly connected to the position, located on the outer side of the inner sleeve, between the upper cross beam and the lower cross beam, and a circular framework is fixedly connected to the middle of each arc-shaped framework. And when the centralizer is subjected to extrusion force of different degrees, the pressure is dispersed through elastic deformation, so that the centralizer more accurately and stably performs straight movement, the curvature of a borehole is controlled, meanwhile, the deviation of a drill bit is reduced, and the whole structure is simple and high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum processing, specifically is a hydraulic centralizer. BACKGROUND

[0002] In the petroleum processing process, when the drill string is high-speed rotating in the hole, the slender drill pipe needs to be kept stable operation, so a special hydraulic casing centralizer is needed to work. The hydraulic casing centralizer is composed of a special material centralizing piece skeleton, a liquid cylinder, a central pipe, upper and lower joints, etc. The hydraulic casing centralizer is connected with the well completion pipe string and lowered into the well, and uses the internal control pressing method to compress the centralizing skeleton to make it expand and tightly contact with the well wall, so as to achieve the purpose of centering.

[0003] Through retrieval, the Chinese utility model patent with publication number CN214787234U discloses a hydraulic casing centralizer, the inner diameter of the upper joint and the lower joint is the same as the inner diameter of the casing, the upper part of the lower joint has a pressure transmission hole, the inner locking teeth of the lock ring are matched with the outer locking teeth of the lower joint, the lock ring is installed outside the lower joint, the cone is sleeved outside the lock ring, the inside of the cone has an annulus, the lower part of the cone is a conical body, the upper part of the upper centralizing body has a larger outer diameter than the lower part, the upper part of the upper centralizing body is milled into a strip body, the upper centralizing body is sleeved outside the lower joint, the lower part of the lower centralizing body is milled into a strip body, the lower centralizing body is sleeved outside the upper centralizing body, the lower part of the lower centralizing body is fixed on the lower joint, the piston is sleeved on the upper part of the lower joint, the lower part of the piston is connected with the upper part of the cone, there is an inner sealing ring between the inner wall of the piston and the outer wall of the lower joint, the lower part of the lower part of the outer wall of the upper joint enters the upper part of the inner wall of the piston, there is an outer sealing ring between the lower part of the outer wall of the lower part of the upper joint and the inner wall of the piston, and the upper part of the piston is connected to the upper joint by the constant pressure pin.

[0004] However, the above technical solution has the following problems: in the above technical solution, when hydraulic pressure is added to the casing, the hydraulic pressure will push the piston downward, and the upper centralizing body and the lower centralizing body can expand outward, so that the expanded outer shape is larger than that of the prior art, which can ensure that the casing is in the central position and improve the centralizing effect, but the centralizer is easily broken due to the extrusion of rocks with different densities in the rock layer. The above scheme is complex to operate and has poor practicality. SUMMARY

[0005] The utility model aims at providing a hydraulic centralizer to solve the problem of the centralizer being easily broken due to the extrusion of rocks with different densities in the rock layer.

[0006] To achieve the above object, the utility model provides following technical scheme: a hydraulic centralizer, include: upper crossbeam and lower crossbeam, the upper crossbeam and the lower crossbeam are the hollow cylinder of same size, the upper crossbeam and the lower crossbeam between fixed connection have inner sleeve, the upper crossbeam and the lower crossbeam between fixed connection have six arc skeletons of circumferential array distribution of upper and lower shape symmetry outside the inner sleeve, the arc skeleton middle part fixed connection have circular skeleton.

[0007] Further, the upper crossbeam and the lower crossbeam one side are provided with the notch, the notch is fixedly connected with the connecting piece, the connecting piece is threadedly rotatably connected with the screw.

[0008] Further, the arc skeleton and the circular skeleton outside between fixed connection have the cover between the upper crossbeam and the lower crossbeam.

[0009] Further, the upper crossbeam's inside is equipped with upper opening, the lower crossbeam's inside is equipped with lower opening, and the upper opening and the lower opening are same in diameter.

[0010] Further, six the arc skeleton inside upper and lower sides are fixedly connected with spring, and the other end of the spring is fixedly connected outside the inner sleeve, and the spring is fixedly connected with the first damping column inside.

[0011] Further, the circular skeleton and the inner sleeve between fixed connection have four two two symmetry circumferential array distribution six groups of arc sector, and the circular skeleton and the inner sleeve between fixed connection have the second damping column through the arc sector.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The upper crossbeam and the lower crossbeam are provided, when the hydraulic centralizer is used, the inside of the inner sleeve is a hollow cylinder, and the inside diameter size of the inner sleeve is greater than the diameter size of the sleeve pipe, the upper crossbeam, the lower crossbeam and the inner sleeve are arranged on the suitable position of the sleeve pipe, in the process of downward movement under the pushing of the drill string, the device direction can be vertically downward due to the weight effect of the circular skeleton in the downward direction, the sleeve pipe is driven to move by the force bending of the arc skeleton, the whole petroleum processing tool can disperse the pressure by elastic deformation when being subjected to different degrees of extrusion force when the sleeve pipe passes through the centralizer to drill in the rock layer of different densities, so that the centralizer moves straightly more accurately and stably, the curvature of the wellbore is controlled, and the deviation of the drill bit is reduced, and the device has simple structure and high practicality. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the perspective view of the utility model hydraulic centralizer;

[0015] Figure 2 It is the internal three-dimensional detail view of the hydraulic centralizer of the utility model;

[0016] Figure 3 It is the enlarged detail view of A part of the hydraulic centralizer of the utility model;

[0017] Figure 4 It is the enlarged detail view of B part of the hydraulic centralizer of the utility model.

[0018] In the drawing: 1 - upper crossbeam, 2 - upper opening, 3 - lower crossbeam, 4 - lower opening, 5 - round framework, 6 - arc framework, 7 - cover, 8 - inner sleeve, 9 - connecting piece, 10 - screw, 11 - spring, 12 - first damping column, 13 - arc fan blade, 14 - second damping column. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0020] Please refer to Figures 1-4 The utility model provides a technical scheme: a hydraulic centralizer, include: upper crossbeam 1 and lower crossbeam 3, upper crossbeam 1 and lower crossbeam 3 are the hollow cylinder of same size, upper crossbeam 1 and lower crossbeam 3 are fixedly connected with inner sleeve 8 between them, upper crossbeam 1 and lower crossbeam 3 are fixedly connected with six arc frameworks 6 of the circular array distribution of upper and lower shape symmetry between them outside inner sleeve 8, arc framework 6 middle part is fixedly connected with round framework 5, the inside of inner sleeve 8 is hollow cylinder, and the inside diameter size of inner sleeve 8 is greater than the diameter size of casing, through upper crossbeam 1, lower crossbeam 3 and inner sleeve 8, the appropriate position of casing is covered, in the process of downward movement under the driving of drill string, because round framework 5 has weight effect in the downward direction, the device direction can be vertically downward, through the stress bending of arc framework 6, the casing is moved straight down.

[0021] The side of upper crossbeam 1 and lower crossbeam 3 is provided with a notch, the connecting piece 9 is fixedly connected on the notch, the screw 10 is threadedly rotatably connected on the connecting piece 9, when needing to place the casing in the inside of upper crossbeam 1, lower crossbeam 3 and inner sleeve 8, loosens the screw 10, places the casing into the inside, and then tightens the screw 10 to fix the device.

[0022] The outside of arc framework 6 and round framework 5 is fixedly connected with cover 7 between upper crossbeam 1 and lower crossbeam 3, the surface strength of cover 7 is higher and it is the carbon fiber composite material with certain expansion elasticity, can protect the mechanism inside the device.

[0023] The inner side of the upper cross beam 1 is provided with an upper opening 2, and the inner side of the lower cross beam 3 is provided with a lower opening 4, the upper opening 2 and the lower opening 4 have the same diameter, and lubricating oil is arranged in the upper opening 2 and the lower opening 4, so that the sleeve can enter better.

[0024] The six arc-shaped skeletons 6 are symmetrically and fixedly connected with springs 11 on the upper and lower sides of the inner side, the other end of the spring 11 is fixedly connected to the outer side of the inner sleeve 8, the inside of the spring 11 is fixedly connected with a first damping column 12, when the arc-shaped skeleton 6 is extruded and deformed to contract inward, at the same time, the spring 11 is contracted, when the pressure is less than the rebound force of the spring 11, the spring 11 is reset, and the arc-shaped skeleton 6 gradually restores the original shape.

[0025] The four pairs of six groups of arc-shaped fan blades 13 are fixedly connected between the circular skeleton 5 and the inner sleeve 8 in a circumferential array distribution, and the second damping column 14 is fixedly connected between the circular skeleton 5 and the inner sleeve 8 and penetrates the arc-shaped fan blades, when the circular skeleton 5 is extruded by pressure, the arc-shaped fan blades 13 in each group of four pieces are deformed between each other, the external force is offset, and the whole device can withstand greater external pressure.

[0026] Working principle: when the hydraulic centralizer is used, the whole centralizer has a streamlined shape, which is beneficial to reduce resistance, can better drill holes, and the inner sleeve 8 is a hollow cylinder, and the inner diameter of the inner sleeve 8 is greater than the diameter of the sleeve, the upper cross beam 1, the lower cross beam 3 and the inner sleeve 8 are sleeved on the sleeve at a suitable position, in the process of downward movement under the pushing of the drill string, when the arc-shaped skeleton 6 is extruded and deformed to contract inward, at the same time, the spring 11 is contracted, when the pressure is less than the rebound force of the spring 11, the spring 11 is reset, and the arc-shaped skeleton 6 gradually restores the original shape, when the circular skeleton 5 is extruded by pressure, the arc-shaped fan blades 13 in each group of four pieces are deformed between each other, the external force is offset, and the whole device can withstand greater external pressure, at the same time, the device can be vertically downward due to the weight effect of the circular skeleton 5 in the downward direction, the sleeve moves along with the arc-shaped skeleton 6 which is bent and straight downward under stress, the whole petroleum processing tool can disperse pressure through elastic deformation when the sleeve passes through the centralizer to drill holes in rock layers with different densities, can effectively prevent the rupture of the centralizer and other conditions, makes the centralizer more accurately and stably move straight, controls the curvature of the wellbore and reduces the deviation of the drill bit, the device has the advantages of simple structure and high practicability.

[0027] Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection range of the utility model.

Claims

1. A hydraulic centralizer comprising: The upper cross beam (1) and the lower cross beam (3) are characterized in that: the upper cross beam (1) and the lower cross beam (3) are hollow cylinders of the same size, the inner sleeve (8) is fixedly connected between the upper cross beam (1) and the lower cross beam (3), six arc-shaped skeletons (6) symmetrically distributed in a circular array are fixedly connected between the upper cross beam (1) and the lower cross beam (3) outside the inner sleeve (8), and the arc-shaped skeletons (6) are fixedly connected with circular skeletons (5) in the middle.

2. A hydraulic centralizer according to claim 1, characterized in that: The upper cross beam (1) and the lower cross beam (3) are characterized in that: the upper cross beam (1) and the lower cross beam (3) are hollow cylinders of the same size, the inner sleeve (8) is fixedly connected between the upper cross beam (1) and the lower cross beam (3), six arc-shaped skeletons (6) symmetrically distributed in a circular array are fixedly connected between the upper cross beam (1) and the lower cross beam (3) outside the inner sleeve (8), and the arc-shaped skeletons (6) are fixedly connected with circular skeletons (5) in the middle.

3. A hydraulic centralizer according to claim 1, characterized in that: The arc-shaped skeletons (6) and the circular skeletons (5) are fixedly connected with the sleeve cover (7) between the upper cross beam (1) and the lower cross beam (3) outside.

4. A hydraulic centralizer according to claim 1, characterized in that: The inner side of the upper cross beam (1) is provided with an upper opening (2), and the inner side of the lower cross beam (3) is provided with a lower opening (4), and the upper opening (2) and the lower opening (4) are the same in diameter.

5. A hydraulic centralizer according to claim 1, characterized in that: The inner side of the upper cross beam (1) is provided with an upper opening (2), and the inner side of the lower cross beam (3) is provided with a lower opening (4), and the upper opening (2) and the lower opening (4) are the same in diameter.

6. A hydraulic centralizer according to claim 1, characterized in that: The inner side of the upper cross beam (1) is provided with an upper opening (2), and the inner side of the lower cross beam (3) is provided with a lower opening (4), and the upper opening (2) and the lower opening (4) are the same in diameter. The circular skeletons (5) and the inner sleeve (8) are fixedly connected with six groups of arc-shaped fan blades (13) symmetrically distributed in a circular array, and the second damping column (14) is fixedly connected between the circular skeletons (5) and the inner sleeve (8) penetrating the arc-shaped fan blades (13).

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