Eccentric vibration jam releasing instrument for well logging

Abstract

The invention discloses an eccentric vibration jam releasing instrument for well logging. The eccentric vibration jam releasing instrument comprises an eccentric vibration device. The upper connector device and the lower cylinder device are connected with the top end and the bottom end of the eccentric vibration device respectively, and when the instrument is stuck, the upper connector device is used for controlling the eccentric vibration device to rotate to generate eccentric force to release the instrument. When the instrument is stuck, the upper connector device is used for supplying power to the driving part, so that the eccentric vibration device is controlled to rotate to generate eccentric force to release the instrument, the stuck position of the whole instrument string can be loosened, the instrument string is finally lifted out of a shaft, and the cost is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil well logging, and particularly relates to an eccentric vibration pipe release instrument for well logging. Background Art

[0002] During well logging operations, problems such as poor cementing quality, deformed wellbores, and falling debris in the wellbore may be encountered; especially during the well logging process of large-diameter instruments, the wellbore clearance is small, and the risk of the instrument getting stuck during well logging is extremely high; during perforation operations, the perforating charges are very likely to deform the perforating instrument or the wellbore, etc., which may cause the instrument to get stuck. As a result, the entire instrument string cannot be pulled out of the well, causing a great cost in terms of time and economy.

[0003] For existing common stuck logging instruments, they are purely mechanical and have no power for pipe release. They use the energy stored by pulling the cable until unlocking and then complete upward shock, forming a powerful upward shock. The disadvantage of this is that if the upper part is completely stuck and the cable cannot be pulled, unlocking and upward shock cannot be achieved. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art, and provides an eccentric vibration pipe release instrument for well logging.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A vibration pipe release instrument for well logging, comprising:

[0007] An eccentric vibration device;

[0008] An upper joint device and a lower cylinder device, which are respectively connected to the top end and the bottom end of the eccentric vibration device. When the instrument gets stuck, the upper joint device is used to control the rotation of the eccentric vibration device to generate an eccentric force to release the stuck of the instrument.

[0009] Further, the eccentric vibration device includes a protective sleeve, one end of the protective sleeve is connected to the upper joint device, and the other end is connected to the lower cylinder device;

[0010] An eccentric vibration assembly is provided inside the protective sleeve, an end of the eccentric vibration assembly is fixedly connected with a driving member, and the upper joint device is electrically connected to the driving member.

[0011] Further, the eccentric vibration assembly includes a rotating shaft, the rotating shaft is installed inside the protective sleeve, two groups of eccentric blocks are sleeved outside the rotating shaft, the two groups of eccentric blocks are connected by a second bearing sleeve, and a single-row deep groove ball bearing is sleeved outside the second bearing sleeve;

[0012] A driving member flange seat is provided at the bottom end of the protective sleeve, the bottom end of the rotating shaft is located inside the driving member flange seat, and the driving member is installed inside the driving member flange seat.

[0013] Further, a first gasket, a nut and a tapered roller bearing are further provided at the upper end outside the rotating shaft, and the nut is used to fix the tapered roller bearing;

[0014] A first bearing sleeve is provided at the upper end of the protective sleeve.

[0015] Further, the upper joint device includes an upper joint, the bottom end of the upper joint is connected to the protective sleeve, and a core socket is provided inside the upper joint.

[0016] Further, a circuit board is fixedly connected to the core socket.

[0017] Further, a narrow half-ring, a wide half-ring and a first screw ring are sequentially sleeved on the upper joint.

[0018] Further, the lower cylinder device includes a second sealing ring, a lower cylinder and a core plug, the second sealing ring and the core plug are respectively arranged at both ends of the lower cylinder, and the lower cylinder is connected to the driving member.

[0019] Further, the driving member is a brushless motor.

[0020] Further, both ends of the protective sleeve have threaded sealing surfaces.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. After the eccentric vibration pipe unhooking instrument gets stuck during logging operation and perforation operation, the motor can be started to drive the rotating shaft to rotate, and the eccentric force generated by the eccentric block is used for vibration pipe unhooking.

[0023] 2. During the pipe unhooking process, the magnitude of the vibration force can be changed by adjusting the rotation speed of the brushless motor.

[0024] 3. The magnitude of the vibration force can be adjusted by changing the material of the eccentric block.

[0025] 4. By changing the position of the vibration pipe unhooking instrument in the instrument string, the pipe unhooking problems in special logging projects such as radioactive, nuclear magnetic, electrical imaging, sidewall coring and formation testing can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0027] Figure 1Overall schematic diagram of the eccentric vibration stuck pipe release tool for logging provided by the present invention;

[0028] Figure 2 Schematic sectional view of the upper joint device in the eccentric vibration stuck pipe release tool for logging provided by the present invention;

[0029] Figure 3 Schematic structural diagram of the eccentric vibration device in the eccentric vibration stuck pipe release tool for logging provided by the present invention;

[0030] Figure 4 Schematic diagram of the middle and lower cylinder device in the eccentric vibration stuck pipe release tool for logging provided by the present invention;

[0031] Wherein: 1. Upper joint device; 101. Core socket; 102. Positioning pin; 103. Circlip; 104. Narrow half-ring; 105. First sealing ring; 106. Wide half-ring; 107. First screw ring; 108. Circuit board; 109. Upper joint; 110. Second screw ring; 111. Line joint; 112. Positioning block; 2. Eccentric vibration device; 201. First bearing sleeve; 202. First gasket; 203. Nut; 204. Screw; 205. Tapered roller bearing; 206. Eccentric block; 207. Rotating shaft; 208. Second bearing sleeve; 209. Single-row deep groove ball bearing; 210. Protective sleeve; 211. Second gasket; 212. Driving part flange seat; 213. First screw; 214. Second screw; 215. Brushless motor; 3. Lower cylinder device; 301. Second sealing ring; 302. Lower cylinder; 303. Core plug. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0034] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0036] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0037] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] The following further describes the present invention in detail with reference to the drawings:

[0039] As Figure 1 shown, the embodiments of the present invention provide a vibration sticking release instrument for well logging, including: an eccentric vibration device 2; an upper joint device 1 and a lower cylinder device 3, which are respectively connected to the top and bottom of the eccentric vibration device 2. The eccentric vibration device 2 includes a protective sleeve 210. One end of the protective sleeve 210 is connected to the upper joint device 1, and the other end is connected to the lower cylinder device 3. An eccentric vibration assembly is provided inside the protective sleeve 210. The end of the eccentric vibration assembly is fixedly connected to a driving member. The upper joint device 1 is electrically connected to the driving member. When the instrument gets stuck, the upper joint device 1 is used to supply power to the driving member, so as to control the rotation of the eccentric vibration device 2 to generate an eccentric force to release the stuck instrument. The entire instrument string can loosen the stuck position and finally lift the instrument string out of the wellbore, saving costs.

[0040] Further, the eccentric vibration assembly includes a rotating shaft 207, which is installed inside a protective sleeve 210. Two groups of eccentric blocks 206 are sleeved outside the rotating shaft 207. The two groups of eccentric blocks 206 are connected by a second bearing sleeve 208. A single-row deep groove ball bearing 209 is sleeved outside the second bearing sleeve 208. A driving part flange seat 212 is provided at the bottom end of the protective sleeve 210. The bottom end of the rotating shaft 207 is located inside the driving part flange seat 212, and the driving part is installed inside the driving part flange seat 212. As Figure 2 shown, the first bearing sleeve 201 is fixed to the upper end of the protective sleeve 210 by screws 204. The nut 203 and the tapered roller bearing 205 are both rotatably installed on the rotating shaft 207, and a first gasket 202 is sandwiched between the nut 203 and the tapered roller bearing 205. The tapered roller bearing 205 is fixed by the nut 203. The number of a group of eccentric blocks 206 on the upper part of the rotating shaft 207 is four, and the number of a group of eccentric blocks 206 on the lower part of the rotating shaft 207 is five. The eccentric blocks 206 are of eccentric structure. According to the magnitude of the eccentric force, the eccentric blocks 206 can be processed with materials of different densities such as aluminum, stainless steel, and tungsten steel. The eccentric blocks 206 are fixed to the rotating shaft 207 by the tapered roller bearings 205, while the second bearing sleeve 208 is installed in the inner hole of the single-row deep groove ball bearing 209 and sleeved on the rotating shaft 207 together. After the nut 203, the first gasket 202, the tapered roller bearing 205, the eccentric blocks 206, the second bearing sleeve 208, and the single-row deep groove ball bearing 209 are connected, they are installed inside the protective sleeve 210. A second gasket 211 is placed inside the driving part flange seat 212. The first screw 213 connects the driving part flange seat 212 and the driving part, and the second screw 214 fixes the whole. A first bearing sleeve 201 is provided at the upper end of the protective sleeve 210, and the first bearing sleeve 201 and the protective sleeve 210 are fixedly connected by screws 204.

[0041] In this embodiment, as Figure 1 shown, the upper joint device 1 includes an upper joint 109. Both ends of the protective sleeve 210 have threaded sealing surfaces. The bottom end of the upper joint 109 is threadedly connected to the protective sleeve 210. A core socket 101 is provided inside the upper joint 109. A circuit board 108 is fixedly connected to the core socket 101. A narrow half-ring 104, a wide half-ring 106, and a first screw ring 107 are sequentially sleeved on the upper joint 109. Specifically, after the circuit board 108 is fixed to the 31-core socket 101, the whole is placed inside the upper joint 109 and connected to the line joint 111. At the same time, a positioning pin 102 is inserted into the small hole on the outer side of the top end of the upper joint 109 to block the core socket 101. Then, the first sealing ring 105, the first screw ring 107, the wide half-ring 106, and the narrow half-ring 104 are sequentially sleeved on the upper joint 109. Then, the narrow half-ring 104 is fixed by a circlip retaining ring 103. A second screw ring 110 is sleeved on the lower end of the upper joint 109, and a positioning block 112 is fixed in the dovetail groove of the upper joint 109.

[0042] In this embodiment, the lower cylinder device 3 includes a second sealing ring 301, a lower cylinder 302, and a core plug 303. The second sealing ring 301 and the core plug 303 are respectively arranged at both ends of the lower cylinder 302, and the lower cylinder 302 is connected to the driving member. As Figure 1 and Figure 4 shown, the lower cylinder 302 is screwed to the bottom end of the protective sleeve 210 and sealed through the second sealing ring 301 and the sealing surface on the protective sleeve 210.

[0043] In this embodiment, the driving member is a brushless motor 215, and the driving member flange seat 212 is a motor flange seat.

[0044] After the upper joint device 1, the eccentric vibration device 2, and the lower cylinder device 3 are connected and assembled together, when the instrument is used in a logging or perforating operation and the instrument gets stuck, the cable instrument is completely adsorbed by the mud in the well or hole and is very difficult to be pulled ashore; at this time, power is supplied to the circuit board 108 through the ground control system, and the circuit board 108 controls the brushless motor 215 to start. While the brushless motor 215 drives the rotation shaft 207 to rotate, it drives the two groups of eccentric blocks 206 to rotate. During the rotation of the two groups of eccentric blocks 206, a strong eccentric force will be generated, and under the vibration action of the eccentric force, the whole instrument will be loosened and released from the card in the well or hole, or thrown out of the mud, so as to realize the release of the instrument and pull out the instrument.

[0045] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vibration stuck-release instrument for logging, characterized in that, it includes: an eccentric vibration device (2); an upper joint device (1) and a lower cylinder device (3), which are respectively connected to the top and bottom ends of the eccentric vibration device (2). When the instrument gets stuck, the upper joint device (1) is used to control the rotation of the eccentric vibration device (2) to generate an eccentric force to release the stuck of the instrument.

2. The stuck-release instrument according to claim 1, characterized in that, the eccentric vibration device (2) includes a protective sleeve (210), one end of the protective sleeve (210) is connected to the upper joint device (1), and the other end is connected to the lower cylinder device (3); an eccentric vibration assembly is arranged inside the protective sleeve (210), a driving part is fixedly connected to the end of the eccentric vibration assembly, and the upper joint device (1) is electrically connected to the driving part.

3. The stuck-release instrument according to claim 2, characterized in that, the eccentric vibration assembly includes a rotating shaft (207), the rotating shaft (207) is installed inside the protective sleeve (210), two groups of eccentric blocks (206) are sleeved outside the rotating shaft (207), the two groups of eccentric blocks (206) are connected by a second bearing sleeve (208), and a single-row deep groove ball bearing (209) is sleeved outside the second bearing sleeve (208); a driving part flange seat (212) is arranged at the bottom end of the protective sleeve (210), the bottom end of the rotating shaft (207) is located inside the driving part flange seat (212), and the driving part is installed inside the driving part flange seat (212).

4. The stuck-release instrument according to claim 3, characterized in that, a first gasket (202), a nut (203) and a tapered roller bearing (205) are further arranged at the upper end outside the rotating shaft (207), and the nut (203) is used to fix the tapered roller bearing (205); a first bearing sleeve (201) is arranged at the upper end of the protective sleeve (210).

5. The stuck-release instrument according to claim 2, characterized in that, the upper joint device (1) includes an upper joint (109), the bottom end of the upper joint (109) is connected to the protective sleeve (210), and a core socket (101) is arranged inside the upper joint (109).

6. The stuck-release instrument according to claim 5, characterized in that, a circuit board (108) is fixedly connected to the core socket (101).

7. The stuck-release instrument according to claim 5, characterized in that, a narrow half-ring (104), a wide half-ring (106) and a first screw ring (107) are sequentially sleeved on the upper joint (109).

8. The stuck-release instrument according to claim 2, characterized in that, the lower cylinder device (3) includes a second sealing ring (301), a lower cylinder (302) and a core plug (303), the second sealing ring (301) and the core plug (303) are respectively arranged at both ends of the lower cylinder (302), and the lower cylinder (302) is connected to the driving part.

9. The stuck-release instrument according to any one of claims 2 or 3 or 8, characterized in that, the driving part is a brushless motor (215).

10. The pipe releasing instrument according to any one of claims 2-5, characterized in that, both ends of the protective sleeve (210) have threaded sealing surfaces.

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