Short section device of FITS slurry booster

Abstract

The utility model discloses an FITS mud booster pup joint device, which relates to the technical field of oil fields and comprises a support, a movement mechanism is arranged at one end of the support, a centralizer is arranged at one end, far away from the support, of the movement mechanism, and a lower end is arranged at one end of the centralizer. According to the FITS slurry booster short section device, abrasion of an instrument on the wall of a drill rod can be reduced through the centralizer when the instrument is lowered and lifted up. The grabbing and releasing device can be centered in the drill rod, the grabbing success rate is increased, the rubber ball with the large outer diameter can stretch out and draw back in the axial direction, thrust can be increased, the grabbing and releasing device can automatically adapt to water hole changes, and when the rubber ball expands, the groove and the space in the rubber ball can be communicated together, so that mud in the rubber ball enters the groove, and the water hole changes. And the slurry in the groove can be discharged through the one-way valve subsequently, so that the rubber ball is prevented from continuing to expand, the rubber ball cannot be damaged, and long-time use is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of oil fields, and specifically relates to a FITS mud booster sub device. Background Art

[0002] Horizontal wells of unconventional oil and gas have the characteristics of large well depth, long horizontal section, large vertical-to-horizontal ratio, and relatively poor wellbore conditions. Storage logging instruments such as FITS, THRUBIT, and XTREAM can complete logging operations under complex wellbore conditions such as wellbore collapse and shale swelling by using their unique construction methods. Among them, the FITS instrument is a logging instrument vigorously promoted by China National Logging Corporation and can be applied to logging operations in horizontal wells of unconventional oil and gas and under complex wellbore conditions.

[0003] According to research, there are problems of insufficient thrust and difficult grasping in the through-drill-pipe logging of FITS horizontal well logging at present. The common method to increase thrust is to increase the mud flow rate, and there has been no research on using a mechanical booster structure and a cup with an adaptive nozzle size to increase mud thrust. At present, it is urgent to solve the existing problems to improve the efficiency and success rate of FITS horizontal well construction.

[0004] CN215718685U discloses a logging instrument propulsion sub, which provides a logging instrument propulsion sub. The collar is threadedly connected to the first end of the outer protective sleeve. An upper motor, a transmission central shaft, and a lower motor are sequentially arranged in the outer protective sleeve from top to bottom. The head and tail ends of the transmission central shaft are respectively connected to the output shafts of the upper motor and the lower motor. Propeller blades are installed on the transmission central shaft. Flow guiding holes are opened on the outer protective sleeve. Wellbore fluid flows into the outer protective sleeve through the flow guiding holes and contacts the propeller blades to generate a propulsion force to achieve the purpose of propelling the instrument string into the well.

[0005] The existing technology mainly has the following disadvantages: 1. For the above-mentioned conventional logging instrument propulsion sub, an electric motor is required to drive the propeller blades to generate thrust, which greatly increases the complexity of the logging instrument and cannot be applied to special storage logging instruments. 2. During the storage logging process, when the instrument string has difficulty advancing in the inclined section and the horizontal section, the mud flow rate and the mud pump pressure are increased to push the instrument forward. This will damage the sealing performance of the FITS instrument, damage or even cut off the logging cable, and easily cut off the cable, causing safety accidents. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a FITS mud booster short joint device, which solves the problems that due to the weight and length of the instrument, when the horizontal section is relatively long, there is no gravitational pushing effect of the instrument, the thrust of the mud is greatly weakened, the speed of the mud pushing the instrument is slower, the lowering efficiency of the instrument is low, and due to insufficient thrust, it is difficult for the gripper to grasp the instrument, and sometimes it needs to be grasped several times, resulting in a low success rate of the gripper grasping.

[0007] To achieve the above objectives, the utility model is realized through the following technical solutions: a FITS mud booster short joint device, including a bracket, one end of the bracket is provided with a motion mechanism, a centralizer is arranged at the end of the motion mechanism away from the bracket, a lower end is arranged at one end of the centralizer, and a booster short joint is arranged between the bracket and the motion mechanism.

[0008] The motion mechanism includes a connecting rod, one end of the connecting rod is fixedly connected to the booster short joint, a rubber ball is arranged at the end of the connecting rod close to the booster short joint, holes are arranged on the surface of the rubber ball, the number of the holes is two, a cylinder is arranged on one side of the rubber ball, a connecting spring is arranged inside the cylinder, one-way valves are arranged on both the top surface and the bottom surface of the cylinder, and a fixing plate is arranged at the end of the cylinder close to the rubber ball. The centralizer can reduce the wear of the instrument on the drill pipe wall during lowering and lifting. The gripper can be centered in the drill pipe, improving the success rate of grasping. Moreover, the rubber ball with a larger outer diameter can axially expand and contract, which can not only increase the thrust but also automatically adapt to the change of the water eye. When the rubber ball expands, the groove will be connected to the space inside the rubber ball, so that the mud inside the rubber ball enters the groove, and then the mud in the groove can be discharged through the one-way valve, preventing the rubber ball from continuing to expand and causing damage to the rubber ball, facilitating long-term use.

[0009] Preferably, the number of the booster short joints is 18, and the centralizer is made of 60Si2Mn components.

[0010] Preferably, a circular plate is arranged at one end of the connecting rod, and one end of the circular plate is fixedly connected to the connecting rod.

[0011] Preferably, a cross bar is arranged at one end of the bracket, and the cross bar is in contact with the bracket, the circular plate, the fixing plate and the cylinder respectively.

[0012] Preferably, a groove is arranged on the surface of the cross bar close to one end of the connecting spring, and the groove is near the connecting spring and the fixing plate.

[0013] Preferably, screws are provided at both ends of the rubber ball, and both ends of the rubber ball are fixedly connected to the annular plate and the fixing plate through the screws. By contacting the annular plate with the cross bar, the annular plate and the connecting rod can be moved to gradually separate from the cross bar, facilitating the removal of the rubber ball and enabling the replacement of rubber balls of different sizes, which is convenient to use.

[0014] Preferably, one end of the cross bar near the lower end is fixedly connected to the centralizer. The number of one-way valves is two, and the cross-sectional shape of the cross bar is circular.

[0015] Beneficial effects

[0016] The utility model provides a FITS mud booster sub device. Compared with the prior art, the following beneficial effects are achieved:

[0017] 1. For this FITS mud booster sub device, the centralizer can reduce the wear of the instrument on the drill pipe wall during lowering and lifting. The gripper can be centered inside the drill pipe, improving the success rate of grasping. Moreover, the rubber ball with a larger outer diameter can axially expand and contract, which can not only increase the thrust but also automatically adapt to the change of the water eye. When the rubber ball expands, the groove will be connected to the space inside the rubber ball, enabling the mud inside the rubber ball to enter the groove. Subsequently, the one-way valve can discharge the mud in the groove, preventing the rubber ball from continuing to expand and causing no damage to the rubber ball, facilitating long-term use.

[0018] 2. For this FITS mud booster sub device, by contacting the annular plate with the cross bar, the annular plate and the connecting rod can be moved to gradually separate from the cross bar, facilitating the removal of the rubber ball and enabling the replacement of rubber balls of different sizes, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the utility model;

[0020] Figure 2 is the cross-sectional view of the motion mechanism of the utility model;

[0021] Figure 3 is the schematic diagram of the booster sub of the utility model.

[0022] In the figure: 1. Bracket; 2. Motion mechanism; 201. Connecting rod; 202. Rubber ball; 203. Hole; 204. Cylinder; 205. Connecting spring; 206. One-way valve; 207. Fixing plate; 208. Annular plate; 209. Cross bar; 210. Groove; 211. Screw; 3. Centralizer; 4. Lower end; 5. Booster sub. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment 1. Please refer to Figure 1-2 , the present invention provides a technical solution: a FITS mud booster short joint device, including a bracket 1, a movement mechanism 2 is arranged at one end of the bracket 1, a centralizer 3 is arranged at the end of the movement mechanism 2 away from the bracket 1, and a lower end 4 is arranged at one end of the centralizer 3.

[0025] A cylinder 204 is arranged on one side of the rubber ball 202, a connecting spring 205 is arranged inside the cylinder 204, check valves 206 are arranged on both the top surface and the bottom surface of the cylinder 204, and a fixing plate 207 is arranged at one end of the cylinder 204 close to the rubber ball 202.

[0026] A groove 210 is arranged on the surface of one end of the cross bar 209 close to the connecting spring 205. The groove 210 is near the connecting spring 205 and the fixing plate 207. One end of the cross bar 209 close to the lower end 4 is fixedly connected to the centralizer 3. The number of check valves 206 is two, and the cross-sectional shape of the cross bar 209 is circular.

[0027] Embodiment 2. Please refer to Figure 2 , the number of the booster short joints 5 is 18. The centralizer 3 is made of 60Si2Mn components. An annular plate 208 is arranged at one end of the connecting rod 201. One end of the annular plate 208 is fixedly connected to the connecting rod 201. A cross bar 209 is arranged at one end of the bracket 1. The cross bar 209 is in contact with the bracket 1, the annular plate 208, the fixing plate 207 and the cylinder 204 respectively. Screws 211 are arranged at both ends of the rubber ball 202, and both ends of the rubber ball 202 are fixedly connected to the annular plate 208 and the fixing plate 207 respectively through the screws 211.

[0028] The annular plate 208 is in contact with the cross bar 209, which can make the annular plate 208 and the connecting rod 201 move and gradually separate from the cross bar 209, facilitating the removal of the rubber ball 202 and enabling the replacement of rubber balls 202 of different sizes.

[0029] Embodiment 3. Please refer to Figure 3 , a booster short joint 5 is arranged between the bracket 1 and the movement mechanism 2. The movement mechanism 2 includes a connecting rod 201, and one end of the connecting rod 201 is fixedly connected to the booster short joint 5.

[0030] The rubber ball 202 can be inflated through the mud. When the whole continuously moves, multiple booster subsections 5 will also be located in the mud at the same time. The 18 booster subsections 5 are in contact with the mud. The booster subsection 5 is in a tower shape, and the mud will be located at the plane of the booster subsection 5.

[0031] Embodiment 4. Please refer to Figure 2 , one end of the connecting rod 201 close to the booster subsection 5 is provided with a rubber ball 202. The surface of the rubber ball 202 is provided with holes 203. The number of the holes 203 is two. Because there are holes 203 on the surface of the rubber ball 202, the mud can enter the rubber ball 202 through the holes 203, and the rubber ball 202 can be inflated through the mud.

[0032] During operation, since both ends of the rubber ball 202 are fixedly connected to the annular plate 208 and the fixing plate 207 respectively through screws 211, the screws 211 can be removed. Since the annular plate 208 is in contact with the cross bar 209, the annular plate 208 and the connecting rod 201 can move and gradually separate from the cross bar 209, which is convenient for removing the rubber ball 202. Different-sized rubber balls 202 can be replaced, which is convenient to use. When the whole is placed in the mud, because there are holes 203 on the surface of the rubber ball 202, the mud can enter the rubber ball 202 through the holes 203, and the rubber ball 202 can be inflated through the mud. When the whole continuously moves, multiple booster subsections 5 will also be located in the mud at the same time. The 18 booster subsections 5 are in contact with the mud. The booster subsection 5 is in a tower shape, and the mud will be located at the plane of the booster subsection 5. When the booster subsection 5 continues to move, pressure will be generated. When the rubber ball 202 expands to a certain extent, when the rubber ball 202 expands, the fixing plate 207 and the cross bar 209 will move. Since the cross bar 209 is in contact with the bracket 1, the annular plate 208, the fixing plate 207 and the cylinder 204 respectively, it will not hinder the movement. During the movement, the connecting spring 205 near the groove 210 can be squeezed, so that the connecting spring 205 deforms. And when the fixing plate 207 moves, one end of the fixing plate 207 can gradually move near the groove 210, so that the groove 210 is communicated with the space inside the rubber ball 202, so that the mud inside the rubber ball 202 enters the groove 210, and then the mud in the groove 210 can be discharged through the one-way valve 206. In this way, the rubber ball 202 is prevented from continuing to expand and being damaged to the rubber ball 202. The centralizer 3 can reduce the wear of the instrument on the drill pipe wall during lowering and lifting. The gripper can be centered in the drill pipe to improve the success rate of grasping.

[0033] It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0034] The terms "upper", "lower", "front", "rear", "top", "bottom", etc. used in the present utility model to indicate the orientation or positional relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. "Inner" and "outer" refer to the inside and outside of the contour of the corresponding component. The above terms should not be construed as a limitation to the present utility model.

[0035] In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0036] In the present utility model, unless otherwise stated, terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A FITS mud booster subassembly, comprising a bracket (1), characterized in that: One end of the bracket (1) is provided with a motion mechanism (2), one end of the motion mechanism (2) away from the bracket (1) is provided with a straightener (3), one end of the straightener (3) is provided with a lower end (4), and a booster sub-section (5) is arranged between the bracket (1) and the motion mechanism (2); The motion mechanism (2) includes a connecting rod (201). One end of the connecting rod (201) is fixedly connected to the booster sub-section (5). A rubber ball (202) is arranged at one end of the connecting rod (201) close to the booster sub-section (5). The surface of the rubber ball (202) is provided with holes (203). The number of the holes (203) is two. A cylinder (204) is arranged on one side of the rubber ball (202). A connecting spring (205) is arranged inside the cylinder (204). Check valves (206) are arranged on both the top surface and the bottom surface of the cylinder (204). A fixing plate (207) is arranged at one end of the cylinder (204) close to the rubber ball (202).

2. The FITS mud booster sub-device according to claim 1, characterized in that: The number of the booster sub-sections (5) is 18, and the straightener (3) is made of a 60Si2Mn component.

3. A FITS mud booster sub assembly according to claim 1, characterized in that: One end of the connecting rod (201) is provided with an annular plate (208), and one end of the annular plate (208) is fixedly connected to the connecting rod (201).

4. The FITS mud booster sub assembly according to claim 3, characterized in that: One end of the bracket (1) is provided with a cross bar (209), and the cross bar (209) is in contact with the bracket (1), the annular plate (208), the fixing plate (207) and the cylinder (204) respectively.

5. The FITS mud booster sub assembly according to claim 4, wherein: A groove (210) is arranged on the surface of one end of the cross bar (209) close to the connecting spring (205), and the groove (210) is near the connecting spring (205) and the fixing plate (207).

6. The short joint device of a FITS mud booster according to claim 3, characterized in that: Screws (211) are arranged at both ends of the rubber ball (202), and both ends of the rubber ball (202) are fixedly connected to the annular plate (208) and the fixing plate (207) respectively through the screws (211).

7. A FITS mud booster sub assembly according to claim 4, wherein: One end of the cross bar (209) close to the lower end (4) is fixedly connected to the straightener (3). The number of the check valves (206) is two, and the cross section of the cross bar (209) is circular.

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