Adjustable centralizer for oil field well logging

Abstract

The adjustable centralizer comprises a first fixing sleeve and a second fixing sleeve, protective strips are fixedly connected to the outer surfaces of one ends of the first fixing sleeve and the second fixing sleeve, adjusting assemblies are arranged on the outer surfaces of one ends of the protective strips, and each adjusting assembly comprises a positioning seat, a connecting rod, a connecting spring, a ball seat and a rolling ball. The connecting rod is located in the middle of the positioning seat, the connecting spring is located between the connecting rod and the positioning seat, the ball seat is located at one end of the connecting rod, the rolling ball is located in the middle of the ball seat, and the connecting rod is movably connected with the positioning seat through the connecting spring. When the adjusting assembly is used, the adjusting assembly can roll by being attached to the well wall through the rolling ball on the ball seat, when the angle of the well wall is changed or impurities are attached to the inner wall, the rolling ball is pressed to move backwards through the ball seat, when the ball seat moves backwards, the connecting rod compresses the connecting spring to contract, and therefore the automatic adjusting effect can be started; and the rolling ball can be prevented from being clamped in the well wall.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield logging technical field especially, it is with adjustable centralizer for oilfield logging. BACKGROUND

[0002] ‌Oilfield logging refers to the use of various physical methods to measure the physical properties of downhole rock formation to obtain information about underground oil and gas reservoirs, mainly through measuring the electrochemical properties, electrical conductivity, acoustic properties, radioactivity and other geophysical properties of rock formation to realize;

[0003] A centralizer is often used during oilfield logging, which is a device for supporting and fixing oil pipes and casings to ensure the stability and safety of the oil pipes and casings, but the existing centralizer has certain inconvenience when in use;

[0004] Firstly, the existing centralizer has a roller installed on the outside when in use, which facilitates the movement of the centralizer in the oil well, but the position of the existing roller cannot be adjusted, and when the angle of the oil well changes or impurities adhere to the inner wall, the roller is easy to be stuck, which has certain inconvenience when in use, and the existing centralizer is generally fixed by bolts when in use, which is not convenient to disassemble and assemble when in use;

[0005] Therefore, we propose an adjustable centralizer for oilfield logging. CONTENT OF THE UTILITY MODEL

[0006] In view of the technical problems in the prior art that the centralizer has a roller installed on the outside when in use, which facilitates the movement of the centralizer in the oil well, but the position of the existing roller cannot be adjusted, and when the angle of the oil well changes or impurities adhere to the inner wall, the roller is easy to be stuck, which has certain inconvenience when in use, and the existing centralizer is generally fixed by bolts when in use, which is not convenient to disassemble and assemble when in use, the utility model provides an adjustable centralizer for oilfield logging.

[0007] The technical scheme adopted by the utility model is: an adjustable centralizer for oilfield logging, comprising a first fixing sleeve and a second fixing sleeve, the outer surface of one end of the first fixing sleeve and the second fixing sleeve is fixedly connected with a protective strip, the outer surface of one end of the protective strip is provided with an adjusting assembly, the adjusting assembly comprises a positioning seat, a connecting rod, a connecting spring, a ball seat and a rolling ball, the connecting rod is located in the middle part of the positioning seat, the connecting spring is located between the connecting rod and the positioning seat, the ball seat is located at one end of the connecting rod, and the rolling ball is located in the middle part of the ball seat.

[0008] Further, the connecting rod is movably connected with the positioning seat through the connecting spring, and the connecting spring is fixedly connected with the connecting rod and the positioning seat.

[0009] Further, the connecting rod is welded to the ball seat, and the rolling ball is movably connected to the ball seat.

[0010] Further, the outer wall of the first fixing sleeve is provided with a first fixing sheet, the outer wall of the second fixing sleeve is provided with a second fixing sheet, the middle part of the first fixing sheet is provided with a butt joint rod, and the outer wall of the butt joint rod is provided with a pin hole.

[0011] Further, one end of the outer surface of the second fixing sheet is fixedly connected with a butt joint barrel, the outer wall of the butt joint barrel is provided with a positioning rack, the middle part of the positioning rack is provided with a latch, the outer wall of the latch is fixedly connected with a blocking sheet, and a limiting spring is arranged between the blocking sheet and the positioning rack.

[0012] Further, the butt joint rod penetrates through the first fixing sheet, the butt joint rod and the pin hole are an integral molding structure, the first fixing sleeve is welded to the first fixing sheet, the second fixing sleeve is welded to the second fixing sheet, and the first fixing sleeve and the second fixing sleeve are both semicircular structures.

[0013] Further, the butt joint barrel and the second fixing sheet are a through structure, and the limiting springs are fixedly connected with the blocking sheets and the positioning racks.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. In the present application, the adjusting assembly can roll along the well wall by the rolling ball on the ball seat during use. When the angle of the well wall changes or impurities adhere to the inner wall, the rolling ball will move backward through the ball seat under pressure, and the ball seat will move backward to compress the connecting spring through the connecting rod, thereby enabling automatic adjustment and avoiding the rolling ball from being stuck in the well wall.

[0016] 2. In the present application, the first fixing sleeve can be butt jointed with the second fixing sheet during use, the butt joint rod is inserted into the butt joint barrel during butt joint, the latch can be pulled up during insertion, the latch compresses the limiting spring through the blocking sheet at this time, the latch can be loosened after the butt joint rod is inserted, the latch is inserted into the pin hole under the rebound of the limiting spring at this time, and the first fixing sleeve and the second fixing sleeve are butt jointed and fixed at this time, thereby facilitating disassembly and assembly. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure of the present application;

[0018] Figure 2 is the structure of the adjusting assembly of the present application;

[0019] Figure 3 is the structure of the first fixing sheet and the second fixing sheet of the present application;

[0020] Figure 4 It is the structure diagram of the positioning frame.

[0021] Marked as: 1, first fixed sleeve;2, second fixed sleeve;3, protection strip;4, adjusting assembly;41, positioning seat;42, connecting rod;43, connecting spring;44, ball seat;45, rolling ball;5, first fixed sheet;6, second fixed sheet;7, butt joint rod;8, butt joint cylinder;9, pin hole;10, positioning frame;11, bolt;12, baffle;13, limiting spring. DETAILED DESCRIPTION

[0022] In the description of the utility model, it is explained that, the orientation or position relation indicated by the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0023] In the description of the utility model, it is explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected;It can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] The following will be combined with the drawings Figures 1-4 Further illustrate the utility model.

[0025] In order to solve the problems in the background art, the present application proposes the following technical scheme: an adjustable centralizer for oilfield logging.

[0026] In the specific technical scheme, the first fixing sleeve 1 and the second fixing sleeve 2 are provided with the protective strips 3 fixedly connected to the outer surfaces of one end of the first fixing sleeve 1 and the second fixing sleeve 2, the outer surface of one end of the protective strip 3 is provided with the adjusting assembly 4, the adjusting assembly 4 comprises the positioning seat 41, the connecting rod 42, the connecting spring 43, the ball seat 44 and the rolling ball 45, the connecting rod 42 is located at the middle part of the positioning seat 41, the connecting spring 43 is located between the connecting rod 42 and the positioning seat 41, the ball seat 44 is located at one end of the connecting rod 42, and the rolling ball 45 is located at the middle part of the ball seat 44. When the adjusting assembly 4 is used, the rolling ball 45 on the ball seat 44 can be attached to the well wall to roll, when the angle of the well wall changes or impurities are attached to the inner wall, the rolling ball 45 will move backward through the ball seat 44 under pressure, and the ball seat 44 will move backward to compress the connecting spring 43 through the connecting rod 42, so that the effect of automatic adjustment can be started, and the rolling ball 45 can be prevented from being stuck in the well wall.

[0027] Further, the connecting rod 42 is movably connected to the positioning seat 41 through the connecting spring 43, the connecting spring 43 is fixedly connected to the connecting rod 42 and the positioning seat 41, the connecting rod 42 is welded to the ball seat 44, and the rolling ball 45 is movably connected to the ball seat 44. The rolling ball 45 is embedded in the ball seat 44 during use, can roll in all directions in the ball seat 44, and facilitates the movement of the centralizer.

[0028] Referring to FIGS. 1 to 8, Figure 1 , Figure 3 and Figure 4 , the outer wall of the first fixing sleeve 1 is provided with the first fixing sheet 5, the outer wall of the second fixing sleeve 2 is provided with the second fixing sheet 6, the middle part of the first fixing sheet 5 is provided with the butt joint rod 7, the outer wall of the butt joint rod 7 is provided with the pin hole 9, one end of the outer surface of the second fixing sheet 6 is fixedly connected with the butt joint barrel 8, the outer wall of the butt joint barrel 8 is provided with the positioning rack 10, the middle part of the positioning rack 10 is provided with the latch 11, the outer wall of the latch 11 is fixedly connected with the blocking sheet 12, the blocking sheet 12 and the positioning rack 10 are provided with the limiting spring 13, the first fixing sleeve 1 can be butt jointed with the second fixing sleeve 6 during use, the butt joint rod 7 is inserted into the butt joint barrel 8 during butt joint, the latch 11 can be pulled up during insertion, at this time, the latch 11 compresses the limiting spring 13 through the blocking sheet 12, the latch 11 is inserted into the pin hole 9 under the rebound of the limiting spring 13 after the butt joint rod 7 is butt jointed and inserted, at this time, the first fixing sleeve 1 and the second fixing sleeve 2 are butt jointed and fixed, and disassembly and assembly are facilitated.

[0029] Further, the docking rod 7 penetrates the first fixed sheet 5, the docking rod 7 is integrally formed with the pin hole 9, the first fixed sleeve 1 is welded with the first fixed sheet 5, the second fixed sleeve 2 is welded with the second fixed sheet 6, the first fixed sleeve 1 and the second fixed sleeve 2 are half circular structures, and the first fixed sleeve 1 and the second fixed sleeve 2 can be fixed to the detected pipeline through the first fixed sheet 5 and the second fixed sheet 6 in use.

[0030] Further, the docking barrel 8 is in through structure with the second fixed sheet 6, the limiting springs 13 are fixedly connected with the stop sheets 12 and the positioning frames 10, and the limiting springs 13 mainly limit the stop sheets 12 in use, so that the bolt 11 is conveniently reset.

[0031] In order for those skilled in the art to fully understand the technical solutions, the application is summarized as follows:

[0032] In use, the first fixed sleeve 1 and the second fixed sleeve 2 can be fixed on both sides of the oil well detection pipeline connection, can support the detection pipeline connection, the docking rod 7 is inserted into the docking barrel 8 when the first fixed sleeve 1 and the second fixed sleeve 2 are fixed, the bolt 11 is pulled up when being inserted, the bolt 11 is compressed through the stop sheet 12 at this time, the bolt 11 is inserted into the pin hole 9 under the rebound of the limiting spring 13 when the docking rod 7 is inserted and docked, the first fixed sleeve 1 and the second fixed sleeve 2 are fixed and docked at this time, and the first fixed sleeve 1 and the second fixed sleeve 2 are conveniently disassembled, the rolling ball 45 on the ball seat 44 is attached to the well wall and rolls when the centralizer enters the oil well, the rolling ball 45 is moved backward through the ball seat 44 under pressure when the well wall angle changes or the inner wall is attached with impurities, the connecting spring 43 is compressed and shrunk through the connecting rod 42 when the ball seat 44 moves backward, so that the automatic adjusting effect can be started, and the rolling ball 45 can be avoided from being stuck in the well wall.

[0033] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, the circuit connection adopts the conventional connection mode in the prior art, and details are not described herein, and the contents not described in detail in the description belong to the prior art known by the person skilled in the art.

[0034] Although the embodiments of the utility model have been shown and described, the scope of the utility model is defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. An adjustable centralizer for use in oilfield logging, characterized by, The utility model provides a kind of fixed sleeve, including first fixed sleeve (1) and second fixed sleeve (2), the outer surface of one end of first fixed sleeve (1) and second fixed sleeve (2) is fixedly connected with guard strip (3), the outer surface of one end of guard strip (3) is provided with adjusting assembly (4), adjusting assembly (4) includes locating seat (41), connecting rod (42), connecting spring (43), ball seat (44) and rolling ball (45), connecting rod (42) is located in the middle part of locating seat (41), connecting spring (43) is located between connecting rod (42) and locating seat (41), ball seat (44) is located in one end of connecting rod (42), and rolling ball (45) is located in the middle part of ball seat (44).

2. The adjustable centralizer for use in oilfield logging as claimed in claim 1, wherein, The connecting rod (42) is movably connected with the locating seat (41) by the connecting spring (43), and the connecting spring (43) is fixedly connected with the connecting rod (42) and the locating seat (41).

3. The adjustable centralizer of claim 1, wherein, The connecting rod (42) is welded with the ball seat (44), and the rolling ball (45) is movably connected with the ball seat (44).

4. The adjustable centralizer of claim 1, wherein, The outer wall of the first fixed sleeve (1) is provided with a first fixed sheet (5), the outer wall of the second fixed sleeve (2) is provided with a second fixed sheet (6), the middle part of the first fixed sheet (5) is provided with a butt joint rod (7), and the outer wall of the butt joint rod (7) is provided with a pin hole (9).

5. An adjustable centralizer for use in oilfield logging as defined in claim 4, wherein, One end of the outer surface of the second fixed sheet (6) is fixedly connected with a butt joint cylinder (8), the outer wall of the butt joint cylinder (8) is provided with a positioning rack (10), the middle part of the positioning rack (10) is provided with a latch (11), the outer wall of the latch (11) is fixedly connected with a baffle (12), and the baffle (12) and the positioning rack (10) are provided with a limiting spring (13) therebetween.

6. An adjustable centralizer for use in oilfield logging as defined in claim 4, wherein, The butt joint rod (7) penetrates the first fixed sheet (5), the butt joint rod (7) and the pin hole (9) are an integral structure, the first fixed sleeve (1) and the first fixed sheet (5) are welded, the second fixed sleeve (2) and the second fixed sheet (6) are welded, and the first fixed sleeve (1) and the second fixed sleeve (2) are both semicircular structures.

7. An adjustable centralizer for use in oilfield logging as defined in claim 5, wherein, The butt joint cylinder (8) and the second fixed sheet (6) are a through structure, and the limiting springs (13) are fixedly connected with the baffles (12) and the positioning racks (10).

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