Non-magnetic centralizer made of high-temperature-resistant and wear-resistant composite material

Abstract

A non-magnetic high-temperature-resistant wear-resistant composite centralizer belongs to the technical field of underground drilling and is characterized in that a plurality of centralizing arms are uniformly arranged on the outer circumference of a fixing ring, each centralizing arm is fixedly connected with the outer surface of the fixing ring through each second bolt, a plugging head positioned below a pin is arranged in each pin hole, one end of each plugging head is connected with the bottom of the pin, and the other end of each plugging head is connected with the bottom of the pin. The other end of each plugging head is connected with a preformed hole in the side wall of the outer circumference of the fixing ring, and the centralizing arm is fixedly connected with the outer surface of the fixing ring through each first bolt. The centralizing arm can be conveniently and rapidly replaced through the first bolt, the second bolt and the pin, and the manual maintenance cost is saved. The material is an organic polymer resin material and an alkali-free glass fiber composite material, has extremely stable chemical properties, does not react with media such as acid, alkali, inorganic salt and the like at normal temperature, and has the advantages of high temperature resistance and corrosion resistance. The material is a non-magnetic steel material, so that the influence of magnetic field interference on the logging instrument can be reduced, and the device is suitable for logging instruments with special requirements.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the downhole drilling technical field, more particularly to a kind of non-magnetic high-temperature wear-resistant composite centralizer. BACKGROUND

[0002] Centralizer is the tool commonly used by various logging instruments, simple to manufacture, beautiful structure, firm and durable, large centralizing force, ensure the quality of logging while drilling.

[0003] However, the current centralizer while drilling is used in high-temperature environment, the centralizer is obviously worn in high temperature and in corrosive environment, resulting in the problems such as short service life, so a non-magnetic high-temperature wear-resistant composite centralizer for logging while drilling is needed. UTILITY MODEL CONTENT

[0004] The utility model overcomes the shortcomings of the prior art that the centralizer is easy to corrode and complex to replace, provides a non-magnetic high-temperature wear-resistant composite centralizer, which is corrosion-resistant, reduces the influence of magnetic field interference on logging instrument, and is convenient and fast to replace centralizing arm.

[0005] The technical scheme adopted to solve the above technical problems is that a plurality of centralizing arms are uniformly arranged on the outer circumference of the fixing ring, the centralizing arm is of trapezoidal structure, the lower bottom surface of each centralizing arm is connected with the outer circumferential side wall of the fixing ring, a plurality of pin holes and a plurality of first bolt mounting holes are arranged on the upper bottom horizontal surface of each centralizing arm, the pin holes and the first bolt mounting holes are arranged at intervals, a second bolt is arranged in each first bolt mounting hole, each second bolt fixedly connects the centralizing arm with the outer surface of the fixing ring, a pin is arranged in each pin hole, a plugging head located below the pin is arranged in each pin hole, one end of each plugging head is connected with the bottom of the pin, and the other end of each plugging head is connected with the reserved hole of the outer circumferential side wall of the fixing ring, a second bolt mounting hole is formed in the inclined surface of one side of each centralizing arm, a first bolt is arranged in each second bolt mounting hole, and each first bolt fixedly connects the centralizing arm with the outer surface of the fixing ring.

[0006] Further, the outer circumference of the fixing ring is uniformly provided with four centralizing arms.

[0007] Further, the pin is a ceramic pin.

[0008] Further, the materials of the first bolt, the second bolt and the plugging head are non-magnetic steel materials respectively.

[0009] Further, the material of the righting arm and the fixing ring is organic macromolecular resin material and alkali-free glass fiber composite material respectively.

[0010] Further, one end of each of the plugging heads is connected to the bottom of the pin by resin glue.

[0011] The beneficial effects of the utility model are as follows: (1) the utility model adopts four righting arms which are evenly arranged on the outer circumference of the fixing ring, a plurality of second bolts and first bolts are respectively arranged to fixedly connect the righting arms and the outer surface of the fixing ring, the ceramic pin and the plugging head which are fixedly connected are used to position the righting arm, the first bolt, the second bolt and the pin can be conveniently and quickly replaced with the righting arm, the artificial maintenance cost is saved, and the pin end can improve the wear resistance. (2) the material of the righting arm and the fixing ring of the utility model is organic macromolecular resin material and alkali-free glass fiber composite material respectively, the chemical properties of the organic macromolecular resin material and the alkali-free glass fiber composite material are extremely stable, the organic macromolecular resin material and the alkali-free glass fiber composite material do not react with acid, alkali, inorganic salt and other media at normal temperature, and meanwhile have the advantages of high temperature resistance and corrosion resistance. (3) the material of the first bolt, the second bolt and the plugging head of the utility model is non-magnetic steel material. The non-magnetic steel material can reduce the influence of magnetic field interference on the logging instrument, and is suitable for the logging instrument with special requirements. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a structural schematic view of one embodiment of the non-magnetic high-temperature wear-resistant composite material righting device of the utility model.

[0013] Fig. 2 is a structural schematic view of the righting arm.

[0014] Fig. 3 is a structural schematic view of the internal structure of the righting arm and the fixing ring.

[0015] The drawings show that: 1, pin hole; 2, first bolt mounting hole; 3, righting arm; 4, fixing ring; 5, second bolt mounting hole; 6, pin; 7, first bolt; 8, second bolt; 9, plugging head. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0017] As shown in the drawings, Figs. 1 to 3 The non-magnetic high-temperature wear-resistant composite material righting device of the embodiment is composed of a pin hole 1, a first bolt mounting hole 2, a righting arm 3, a fixing ring 4, a second bolt mounting hole 5, a pin 6, a first bolt 7, a second bolt 8 and a plugging head 9.

[0018] The material of the first bolt 7, the second bolt 8 and the sealing head 9 is non-magnetic steel material respectively, which can reduce the influence of magnetic field interference on the logging instrument and is suitable for the logging instrument with special requirements. The material of the centralizer arm 3 and the fixing ring 4 is organic macromolecular resin material and alkali-free glass fiber composite material respectively, and the chemical properties of the organic macromolecular resin material and the alkali-free glass fiber composite material are extremely stable, which does not react with acid, alkali, inorganic salt and other media at normal temperature, and has good corrosion resistance.

[0019] Four centralizer arms 3 are uniformly arranged on the outer circumference of the fixing ring 4, and the centralizer arms 3 are in trapezoidal structure. The lower bottom surface of each centralizer arm 3 is connected with the outer circumferential sidewall of the fixing ring 4, and the upper bottom horizontal surface of each centralizer arm 3 is provided with a plurality of pin holes 1 and a plurality of first bolt mounting holes 2. The pin holes 1 and the first bolt mounting holes 2 are arranged at intervals, and the second bolt 8 is arranged in each first bolt mounting hole 2. Each second bolt 8 is arranged to fixedly connect the centralizer arm 3 and the outer surface of the fixing ring 4. The pin 6 is arranged in each pin hole 1, and the pin 6 is used for positioning the centralizer arm 3. The pin 6 is a ceramic pin. The sealing head 9 is arranged in each pin hole 1 below the pin 6. One end of each sealing head 9 is connected with the bottom of the pin 6, and the other end of each sealing head 9 is connected with the reserved hole of the outer circumferential sidewall of the fixing ring 4 through resin glue. The side inclined surface of each centralizer arm 3 is provided with the second bolt mounting hole 5, and the first bolt 7 is arranged in each second bolt mounting hole 5. Each first bolt 7 is arranged to fixedly connect the centralizer arm 3 and the outer surface of the fixing ring 4. The first bolt 7, the second bolt 8 and the pin 6 can conveniently and quickly replace the centralizer arm 3, save the labor maintenance cost, and the ceramic pin 6 is protected by the pin hole 1, so that the impact resistance of the ceramic material is improved.

[0020] The above merely describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application.

Claims

1. A non-magnetic, high temperature, wear resistant composite centralizer, characterized in that: A plurality of righting arms (3) are uniformly arranged on the outer circumference of the fixed ring (4), the righting arms (3) are trapezoidal structures, the lower bottom surface of each righting arm (3) is connected with the outer circumferential side wall of the fixed ring (4), a plurality of pin holes (1) and a plurality of first bolt mounting holes (2) are arranged on the upper bottom horizontal surface of each righting arm (3), the pin holes (1) and the first bolt mounting holes (2) are arranged at intervals, a second bolt (8) is arranged in each first bolt mounting hole (2), each second bolt (8) fixedly connects the righting arm (3) and the outer surface of the fixed ring (4), a pin (6) is arranged in each pin hole (1), a plugging head (9) located below the pin (6) is arranged in each pin hole (1), one end of each plugging head (9) is connected with the bottom of the pin (6), the other end of each plugging head (9) is connected with the reserved hole of the outer circumferential side wall of the fixed ring (4), a second bolt mounting hole (5) is formed on one side of each righting arm (3), a first bolt (7) is arranged in each second bolt mounting hole (5), and each first bolt (7) fixedly connects the righting arm (3) and the outer surface of the fixed ring (4).

2. The non-magnetic, high temperature, wear resistant composite centralizer of claim 1, wherein: The outer circumference of the fixed ring (4) is uniformly provided with four righting arms (3).

3. The non-magnetic, high temperature, wear resistant composite centralizer of claim 1, wherein: The pin (6) is a ceramic pin.

4. The non-magnetic, high temperature, wear resistant composite centralizer of claim 1, wherein: The materials of the first bolt (7), the second bolt (8) and the plugging head (9) are non-magnetic steel materials.

5. The non-magnetic, high temperature, wear resistant composite centralizer of claim 1, wherein: The materials of the righting arm (3) and the fixed ring (4) are organic macromolecular resin material and alkali-free glass fiber composite material respectively.

6. The non-magnetic, high temperature, wear resistant composite centralizer of claim 1, wherein: One end of each plugging head (9) is adhesively connected with the bottom of the pin (6) through resin glue.

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