Disassembling and assembling tool for sliding cover in logging instrument

Abstract

The utility model relates to a disassembling and assembling tool for a sliding cover in a logging instrument. The disassembling and assembling tool comprises two fixing supports, a disassembling and assembling block, a lead screw and a ball nut, wherein at least one of the two fixed brackets is fixed on the drill collar; the axis of the lead screw is parallel to the axis of the drill collar, the two ends of the lead screw are matched with the corresponding fixing supports so that the lead screw can be limited between the two fixing supports, and the lead screw can rotate around the axis of the lead screw to drive the ball nut to move. The ball nut moves to drive the dismounting block to move, the dismounting block is matched with the sliding cover in the sinking groove of the drill collar, and the dismounting block moves to drive the sliding cover to move in the sinking groove. According to the utility model, the stress state of the sliding cover is improved; and the lead screw can be driven by an electric tool, so that more labor is saved, and the disassembly and assembly efficiency of the sliding cover can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of disassembly and assembly tools, and in particular relates to a disassembly and assembly tool for a sliding cover in a well logging instrument. Background Art

[0002] The logging while drilling instrument is used to measure formation information while drilling in the formation. The partial cross-sectional view of the circuit assembly of the logging while drilling instrument is as follows: Figure 1 As shown, the circuit assembly 2 of a logging-while-drilling instrument is typically wrapped in a rubber protective sleeve 3 and then integrally embedded in a recessed groove of a drill collar 4. The rubber protective sleeve is protected by a sliding cover 1 disposed within the recessed groove. The side walls of the recessed groove on the drill collar 4 are provided with dovetail grooves that communicate with the recessed groove. The sliding cover 1 slides into the dovetail groove and the recessed groove at the initial end of the dovetail groove. The stability of a logging-while-drilling instrument is crucial. To ensure the circuit assembly operates stably in harsh environments characterized by high-frequency vibration, high temperature, and high pressure, the ends of the sliding cover are typically used to compress and secure the rubber protective sleeve and the internal circuit assembly, significantly reducing the circuit assembly's high-frequency vibration. The sliding cover and rubber protective sleeve are tightly compressed by an interference fit, but this interference fit also significantly increases friction between the sliding cover and the rubber, making assembly and disassembly of the sliding cover difficult.

[0003] The structure of the slide cover is as follows Figure 2 As shown, there are two shallow blind holes 11 on the upper surface of the sliding cover 1; according to the structure of the sliding cover, existing disassembly tools such as Figure 3 As shown, it consists of a push-pull block 5, a push-pull rod 6 and a positioning pin 7. The push-pull block 5 has a through hole and a blind hole. The push-pull rod 6 is limited in the through hole and both ends of the push-pull rod 6 extend out of the through hole. The positioning pin 7 is embedded in the blind hole of the push-pull block 5 through interference fit. When using this tool to disassemble and assemble the sliding cover, as shown in the figure, Figure 4-Figure 5 As shown, the curved surface of the push-pull block 5 mates with the curved surface of the sliding cover 1, and the positioning pin 7 engages with the blind hole 11 on the sliding cover 1. Then, the push-pull rod 6 is manually pushed to move, allowing the push-pull block 5 to drive the sliding cover for disassembly or assembly. Specifically, when installing the sliding cover, the sliding cover is slid into the dovetail groove and the sink groove through the initial end of the dovetail groove, and the slider is pushed to the end of the sink groove and the dovetail groove by pushing and pulling. The process of removing the slider is the opposite of the installation process.

[0004] Use as Figure 3 When the disassembly and assembly tools are used to disassemble and assemble the sliding cover, problems such as the sliding cover cannot be pushed, the positioning pin causes damage to the blind hole, and the sliding cover drives the rubber to extend and crack; and when the force of the push-pull rod 6 is uneven, the force direction of the sliding cover may deviate from the axis of the drill collar. Utility Model Content

[0005] In order to solve all or part of the above problems, the present invention aims to provide a disassembly and assembly tool for the slide cover in a well logging instrument. The disassembly and assembly tool of the present invention improves the stress state of the slide cover during disassembly and assembly, thereby increasing the efficiency of disassembly and assembly.

[0006] According to one aspect of the utility model, a tool for disassembling and assembling a sliding cover in a well logging instrument is provided, comprising:

[0007] two fixing brackets, at least one of which is capable of being fixed on a drill collar;

[0008] A screw and a ball nut cooperate with each other, with both ends of the screw respectively cooperating with the corresponding fixing brackets so that the screw is limited between the two fixing brackets, the axis of the screw is parallel to the axis of the drill collar, and the screw can rotate around its own axis to drive the ball nut to move;

[0009] The disassembly block is configured such that the movement of the ball nut can drive the movement of the disassembly block, the disassembly block cooperates with the sliding cover in the sink groove of the drill collar, and the movement of the disassembly block can drive the sliding cover to move in the sink groove.

[0010] Furthermore, the disassembly and assembly block includes a front pulling block, and the ball nut can be detachably connected to the front pulling block. After the ball nut is connected to the front pulling block, the movement state of the front pulling block along the axis of the drill collar is the same as the movement state of the ball nut along the axis of the drill collar; two top screws are fixedly connected to the front pulling block, and each of the top screws can be extended into the blind hole of the sliding cover, and the front pulling block moves by pulling the sliding cover through the top screws.

[0011] Furthermore, the disassembly and assembly block also includes a push-back block, and the ball nut can also be connected to the push-back block. After the ball nut is connected to the push-back block, the movement state of the push-back block along the axis of the drill collar is the same as the movement state of the ball nut along the axis of the drill collar. Along the moving direction of the ball nut, when the push-back block is located behind the sliding cover, the movement of the push-back block can push the sliding cover to move.

[0012] Furthermore, two vertical teeth are fixedly connected to the rear push block, and the two vertical teeth can be inserted into the sink groove at the same time. A push block is connected between the two vertical teeth, and the push block has a push contact surface perpendicular to the axis of the drill collar, and the push contact surface contacts the corresponding side surface of the sliding cover in the sink groove.

[0013] Furthermore, the ball nut is fixedly connected to a mounting seat, the mounting seat is fixedly connected to a fixing seat, the fixing seat is detachably connected to the front pull block, and the fixing seat is detachably connected to the rear push block.

[0014] Furthermore, a guide connecting rod is provided on each side of the screw, and a through hole is provided on the mounting seat for the two guide connecting rods to pass through. The two ends of each guide connecting rod passing through the through hole are fixedly connected to the corresponding fixed bracket respectively, and the axis of each guide connecting rod is parallel to the axis of the drill collar.

[0015] Furthermore, there are two fixing seats, each of which is fixedly connected to two ear blocks, and each ear block is fixedly connected to the mounting seat through a threaded connection; each fixing seat is provided with a groove, and the front pull block and the rear push block are fixedly connected with a protrusion that cooperates with the groove.

[0016] Furthermore, taking the example of the front pull block and the rear push block being located above the sink, the groove extends from the upper end of the fixed seat to the middle of the fixed seat, and the protrusion is inserted into the groove from the upper end of the groove. Each of the fixed seats is rotatably connected to a pressure plate, and the pressure plate is used to press the protrusion into the groove.

[0017] Furthermore, each of the fixed brackets includes two semicircular rings, and the two semicircular rings of each fixed bracket are connected to form a circular ring that can be sleeved on the drill collar; one of the semicircular rings is fixedly connected to a fixed clamping block, and the fixed clamping block is gap-matched with the sink groove, and the fixed clamping block is provided with a clamping groove that cooperates with the boss in the sink groove of the drill collar.

[0018] Furthermore, both ends of the screw are respectively connected to bearing seat assemblies, and each bearing seat assembly is connected to the corresponding semicircular ring; one end of the screw extends out of the bearing seat assembly, and this end of the screw is fixedly connected to a polygonal rotating head.

[0019] As can be seen from the above technical solution, the utility model provides a disassembly and assembly tool for a sliding cover in a well logging instrument, which has the following beneficial effects:

[0020] The arrangement of the utility model improves the stress state of the sliding cover; and the lead screw of the utility model can be driven by an electric tool, thereby having the advantage of more labor saving and also improving the efficiency of disassembly and assembly of the sliding cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a partial cross-sectional view of the circuit assembly of the logging while drilling instrument.

[0022] Figure 2 Schematic diagram of the structure of the sliding cover;

[0023] Figure 3 A tool for disassembling and assembling a sliding cover in the prior art;

[0024] Figure 4 To utilize Figure 3 Schematic diagram of disassembly and assembly tools for disassembling the slide cover;

[0025] Figure 5 To utilize Figure 3 A cross-sectional view of the disassembly tool for disassembling the slide cover;

[0026] Figure 6 This is a schematic diagram of a tool for disassembling and assembling a sliding cover in a well logging instrument according to the present invention;

[0027] Figure 7 This is a schematic diagram of the front pull block of the present invention;

[0028] Figure 8 To utilize Figure 7 Schematic diagram of the front pull block pulling the sliding cover;

[0029] Figure 9 It is a schematic diagram of the push-back block of the utility model;

[0030] Figure 10 To utilize Figure 9 Schematic diagram of the push block pushing the sliding cover;

[0031] Figure 11 is a schematic diagram of the fixing seat;

[0032] Figure 12-13 is a schematic diagram of the boss on the drill collar;

[0033] Figure 14 Schematic diagram of a fixed card block;

[0034] Figure 15 A schematic diagram of installing the sliding cover using a push-back block;

[0035] Figure 16 A schematic diagram of removing the sliding cover using the front pull block;

[0036] The reference numerals in the figure are: sliding cover 1, blind hole 11, circuit assembly 2, rubber protective cover 3, drill collar 4, boss 41, push-pull block 5, push-pull rod 6, positioning pin 7;

[0037] Fixed bracket 01, semicircular ring 011, fixed block 012, slot 013, screw 02, ball nut 03, disassembly block 04, front pull block 041, protrusion 042, top screw 043, rear push block 044, vertical tooth 045, push block 046, bearing seat assembly 05, mounting seat 06, fixed seat 07, ear block 071, groove 072, screw hole 073, guide connecting rod 08. DETAILED DESCRIPTION

[0038] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a disassembly tool for a sliding cover in a well logging instrument of the present invention in conjunction with the accompanying drawings.

[0039] like Figure 6 As shown, it shows a disassembly and assembly tool for the sliding cover in a logging instrument according to an embodiment of the utility model, comprising two fixed brackets 01, a disassembly and assembly block 04, a screw 02 and a ball nut 03 that cooperate with each other; wherein, at least one of the two fixed brackets 01 is fixed on the drill collar; the axis of the screw 02 is parallel to the axis of the drill collar, and the two ends of the screw 02 are respectively matched with the corresponding fixed brackets 01 so that the screw 02 is limited between the two fixed brackets 01, and the screw 02 can rotate around its own axis to drive the ball nut 03 to move; the movement of the ball nut 03 can drive the movement of the disassembly and assembly block 04, and the disassembly and assembly block 04 cooperates with the sliding cover in the sink groove of the drill collar, and the movement of the disassembly and assembly block 04 can drive the sliding cover to move in the sink groove.

[0040] Specifically, at least one of the two fixed brackets 01 is fixed on the drill collar, and the arrangement of the screw 02 and the two fixed brackets 01 prevents the screw 02 from moving along the axial direction of the drill collar; the screw 02 cooperates with the ball nut 03, and the screw 02 cannot move along the axial direction of the drill collar, so the rotation of the screw 02 can drive the ball nut 03 to move; and since the axis of the screw 02 is parallel to the axis of the drill collar, the rotation of the screw 02 can drive the ball nut 03 to move in a direction parallel to the axis of the drill collar; the ball nut 03 cooperates with the disassembly block 04, and the movement of the ball nut 03 can drive the disassembly block 04 to move; the movement of the disassembly block 04 can drive the sliding cover to move in the sink groove, and the movement of the sliding cover in the sink groove of the drill collar realizes the disassembly or installation of the sliding cover.

[0041] In this embodiment, the disassembly block 04 is driven by the screw 02 and the ball nut 03. This structure converts the rotation of the screw 02 into linear movement of the ball nut 03, and the ball nut 03 moves in a direction parallel to the axis of the drill collar to drive the disassembly block 04 and the sliding cover to move, so that the direction of the force applied to the sliding cover by the disassembly block 04 is parallel to the axis of the drill collar, thereby improving the force state of the sliding cover; secondly, the screw 02 of this embodiment can be driven by an electric tool, such as a motor, etc., which has the advantage of being more labor-saving than the existing technology, and can also improve the disassembly and assembly efficiency of the sliding cover.

[0042] In one embodiment, if Figure 7-Figure 8As shown, the disassembly block 04 includes a front pull block 041, and the ball nut 03 can be detachably connected to the front pull block 041. After the ball nut 03 is connected to the front pull block 041, the movement state of the front pull block 041 along the axis of the drill collar is the same as the movement state of the ball nut 03 along the axis of the drill collar; two top screws 043 are fixedly connected to the front pull block 041, and each top screw 043 can be extended into the blind hole of the sliding cover. The front pull block 041 moves through the top screw 043 to pull the sliding cover to move.

[0043] In this embodiment, the disassembly block 04 is a front pull block 041, and the ball nut 03 can be detachably connected to the front pull block 041. After the ball nut 03 is connected to the front pull block 041, the movement state of the front pull block 041 along the axis of the drill collar is the same as the movement state of the ball nut 03 along the axis of the drill collar. Therefore, the movement of the ball nut 03 can drive the front pull block 041 to move.

[0044] In this embodiment, the front pull block 041 moves through the top screw 043 to drive the sliding cover to move. Specifically, for example, two threaded holes are set on the front pull block 041, and the threaded top screw 043 is used, and the length of the top screw 043 is sufficient to extend into the blind hole of the sliding cover.

[0045] Regarding the process of disassembling and assembling the sliding cover, taking the installation of the sliding cover as an example, slide the sliding cover into the dovetail groove and the countersunk groove through the initial end of the dovetail groove, turn the screw 02 to move the ball nut 03 to the top of the sliding cover, connect the front pull block 041 with the ball nut 03, and then turn the screw 02 again to make the ball nut 03 drive the sliding cover to move through the front pull block 041 and the top screw 043. After the sliding cover moves to the corresponding position, stop turning the screw 02; the process of disassembling the sliding cover is similar to the process of installing the sliding cover, and will not be repeated here.

[0046] In one embodiment, if Figure 9-10 As shown, the disassembly block 04 also includes a push-back block 044, and the ball nut 03 can also be connected to the push-back block 044. After the ball nut 03 is connected to the push-back block 044, the movement state of the push-back block 044 along the axis of the drill collar is the same as the movement state of the ball nut 03 along the axis of the drill collar. Along the moving direction of the ball nut 03, when the push-back block 044 is located behind the sliding cover, the movement of the push-back block 044 can push the sliding cover to move.

[0047] In this embodiment, the disassembly block 04 further includes a rear push block 044, and the ball nut 03 can be connected to the rear push block 044. When the ball nut 03 is connected to the rear push block 044, the movement state of the rear push block 044 along the axis of the drill collar is the same as the movement state of the ball nut 03 along the axis of the drill collar. Therefore, after the ball nut 03 is connected to the rear push block 044, the movement of the ball nut 03 can drive the movement of the rear push block 044. In a specific implementation, the ball nut 03 and the rear push block 044 can be connected in a fixed connection or a detachable connection, so that the movement of the ball nut 03 drives the movement of the rear push block 044, and the movement directions of the two are parallel.

[0048] again, Figure 10 The direction of the arrow in the middle indicates the moving direction of the ball nut 03. Figure 10 As shown, along the moving direction of the ball nut 03, when the push block 044 is located behind the sliding cover, the movement of the push block 044 can push the sliding cover to move, that is, when the push block 044 of this embodiment is located behind the sliding cover, the push block 044 can push the sliding cover to move.

[0049] During the process of installing the sliding cover, the rear push block 044 can be used to push the sliding cover to the corresponding positions at the ends of the sink groove and the dovetail groove, or the front pull block 041 can be used to pull the sliding cover to the corresponding positions at the ends of the sink groove and the dovetail groove; during the process of removing the sliding cover, the front pull block 041 can be used to pull the sliding cover to the initial end of the dovetail groove, and then the sliding cover can be removed.

[0050] and Figure 3 Compared with the corresponding disassembly and assembly tools: Figure 3 The direction of the force applied by the person when using the corresponding disassembly and assembly tools cannot be guaranteed. In this embodiment, when the sliding cover is pushed by the rear push block 044, the sliding cover is only subjected to axial thrust and friction. When the sliding cover is pulled by the front pull block 041, the sliding cover is only subjected to pulling force and friction. Therefore, the setting of this embodiment improves the force state of the sliding cover during the disassembly and assembly process.

[0051] In one embodiment, if Figure 9 As shown, two vertical teeth 045 are fixedly connected to the rear push block 044, and the two vertical teeth 045 can be inserted into the sink groove at the same time. A push block 046 is connected between the two vertical teeth 045, and the push block 046 has a push contact surface perpendicular to the axis of the drill collar, and the push contact surface contacts the corresponding side surface of the sliding cover in the sink groove; the ball nut 03 is detachably connected to the rear push block 044.

[0052] Specifically, vertical teeth 045 are fixedly connected to rearward push block 044. Two vertical teeth 045 can be simultaneously inserted into the recessed groove. Push block 046 is connected between the two vertical teeth 045. After the two vertical teeth 045 are simultaneously inserted into the recessed groove of the drill collar, the push contact surface of push block 046 contacts the corresponding side surface of the slide cover. Along the movement direction of ball nut 03, when rearward push block 044 is located behind the slide cover, the push contact surface of rearward push block 044 cooperates with the side surface of the slide cover to push the slide cover. To prevent interference between rearward push block 044 and the slide cover during adjustment, rearward push block 044 and ball nut 03 should be detachably connected.

[0053] In one embodiment, if Figure 6 As shown, the ball nut 03 is fixedly connected to the mounting seat 06, the mounting seat 06 is fixedly connected to the fixing seat 07, the fixing seat 07 is detachably connected to the front pull block 041, and the fixing seat 07 is detachably connected to the rear push block 044.

[0054] In this embodiment, the ball nut 03 is fixed to the mounting seat 06, which is fixedly connected to the fixing seat 07, and the front pull block 041 and the rear push block 044 are respectively detachably connected to the mounting seat 07. In a specific implementation, for example, the fixing seat 07 is fixed below the mounting seat 06, and the two sides of the fixing seat 07 are respectively detachably connected to the front pull block 041 and the rear push block 044. In combination with the above embodiment, after the fixing seat 07 is connected to the front pull block 041 and the rear push block 044, the movement state of the front pull block 041 along the drill collar axis and the movement state of the rear push block 044 along the drill collar axis are both the same as the movement state of the ball nut 03 along the drill collar axis. In a specific implementation, for example, the fixing seat 07 is fixed to the mounting seat 06 by screws.

[0055] In one embodiment, if Figure 6 As shown, a guide connecting rod 08 is provided on both sides of the screw 02, and a through hole is provided on the mounting seat 06 for the two guide connecting rods 08 to pass through. The two ends of each guide connecting rod 08 passing through the through hole are fixedly connected to the corresponding fixed bracket 01, and the axis of each guide connecting rod 08 is parallel to the axis of the drill collar.

[0056] The setting of the guide connecting rod 08 is used to play a guiding role, so that the ball nut 03 and the mounting seat 06 can only move in a direction parallel to the axis of the guide connecting rod 08. The axis of the guide connecting rod 08 is parallel to the axis of the drill collar, which further limits the ball nut 03 and the mounting seat 06 to only move in a direction parallel to the axis of the drill collar.

[0057] In one embodiment, there are two fixing seats 07, such as Figure 11As shown, each fixing seat 07 is fixedly connected to two ear blocks 071, and each ear block 071 is fixedly connected to the mounting seat 06 through a threaded connection; a groove 072 is provided on each fixing seat 07, and the front pull block 041 and the rear push block 044 are fixedly connected to a protrusion 042 that cooperates with the groove 072.

[0058] In this embodiment, there are two fixing seats 07, each of which is fixedly connected to the mounting seat 06. In a specific implementation, for example, the two fixing seats 07 are located on either side of the mounting seat 06; or, for another example, one fixing seat 07 is located in front of the ball nut 03 in its moving direction, while the other fixing seat 07 is located behind the ball nut 03 in its moving direction. Each fixing seat 07 is fixedly connected to the mounting seat 06 via its two lugs 071, for example, by screws connecting the lugs 071 of the fixing seat 07 to the mounting seat 06.

[0059] Again, the front pull block 041 and the rear push block 044 are axially fixed to the fixed seat 07 through the cooperation of the groove 072 and the protrusion 042, so that the movement state of the front pull block 041 and the rear push block 044 along the drill collar axis is the same as that of the fixed seat 07. Specifically, the fixed seat 07 and the front pull block 041, and the fixed seat 07 and the rear push block 044 are both detachably connected through the cooperation of the groove 072 and the protrusion 042, and after the groove 072 and the protrusion 042 are connected, the movement state of the protrusion 042 along the drill collar axis is the same as the movement state of the groove 072 along the drill collar axis; that is, after the groove 072 and the protrusion 042 are connected, the ball nut 03 moves through the groove 072 and the protrusion 042, driving the two protrusions 042 to move.

[0060] In one embodiment, taking the case where the front pulling block 041 and the rear pushing block 044 are located above the sink, the groove 072 extends from the upper end of the fixing seat 07 to the middle of the fixing seat 07, and the protrusion 042 is inserted into the groove 072 from the upper end of the groove 072. A pressure plate is rotatably connected to each fixing seat 07, and the pressure plate is used to press the protrusion 042 into the groove 072.

[0061] In this embodiment, groove 072 extends from the upper end of fixing seat 07 to the middle of fixing seat 07. Alternatively, groove 072 can extend from the upper end of fixing seat 07 to the lower end of fixing seat 07. For both types of grooves 072, protrusion 042 can be inserted into groove 072 from the upper end. In this embodiment, protrusion 042 is removed in an upward direction perpendicular to the axis of the drill collar. Therefore, after protrusion 042 is inserted into groove 072, ball nut 03 moves, and neither front pull block 041 nor rear push block 044 will be detached from ball nut 03.

[0062] Next, when using the front pull block 041 to disassemble and assemble the sliding cover, the pressing plate presses the protrusion 042 of the front pull block 041 into the groove 072, thereby ensuring that the top screw 043 on the front pull block 041 is pressed tightly into the blind hole of the sliding cover, thereby avoiding the situation where the front pull block 041 jumps out due to the shallow blind hole. Figure 11 As shown, a screw hole 073 extending downward is provided at the upper end of the fixing seat 07, and the pressing plate is connected to the screw hole 073 on the fixing seat 07 by screws.

[0063] Finally, for the push block 044, when it is implemented, Figure 9 As shown, a pair of vertical teeth 045 can be disposed in the middle of the rear push block 044, and protrusions 042 of this embodiment can be disposed on both the left and right sides of the pair of vertical teeth 045. Furthermore, a push block 046 can be configured as a push contact surface on one side of each protrusion 042. Thus, each of the two protrusions 042 is connected to the groove 072 of the fixing seat 07, and the rear push block 044 can push the sliding cover via the push contact surface. In other words, the rear push block 044 has a bilaterally symmetrical structure with two vertical teeth 045 symmetrically disposed in the middle. The fit between the vertical teeth 045 and the drill collar recess is a clearance fit, and the push contact surface between the two vertical teeth 045 contacts the axial end face of the sliding cover. When the rear push block 044 moves along the axial direction, it pushes the sliding cover to move along with it.

[0064] In one embodiment, each fixing bracket 01 includes two semicircular rings 011, and the two semicircular rings 011 of each fixing bracket 01 are connected to form a circular ring that can be sleeved on the drill collar; one of the semicircular rings 011 is fixedly connected to a fixed clamping block 012, and the fixed clamping block 012 is matched with the clearance of the sink groove, and the fixed clamping block 012 is provided with a clamping groove 013 that matches the boss in the sink groove of the drill collar.

[0065] In this embodiment, each fixing bracket 01 includes two semicircular rings 011. The two semicircular rings 011 are connected by a connector, such as a screw or a connecting pin, to form a circular ring that can be sleeved on a drill collar. One end of each semicircular ring 011 is connected to one end of a corresponding semicircular ring 011 via the connector. In specific implementation, for any fixing bracket 01, the axes of the two corresponding connectors can be arranged vertically, that is, one connector connects one end of the two semicircular rings 011 from top to bottom, and the other connector connects the other ends of the two semicircular rings 011 from left to right.

[0066] Secondly, the boss 41 in the sink groove of the drill collar 4 is as follows Figure 12-13 As shown, the fixed block 012 is as shown in FIG. Figure 14As shown, to cooperate with the two bosses 41 in the sink, two slots 013 are provided on the fixed block 012. The cooperation between the bosses 41 and the slots 013 allows the fixed bracket 01 with the fixed block 012 to be positioned along the axis of the drill collar. The fixed bracket 01 with the fixed block 012 is limited in position around the drill collar by the clearance between the fixed block 012 and the sink. This arrangement allows the fixed bracket 01 to be fixed to the drill collar.

[0067] When the sliding cover needs to be disassembled, for any fixed bracket 01, first place the two semicircular rings 011 at the corresponding positions of the drill collar, and then use the connecting parts to connect the two semicircular rings 011; for the fixed bracket 01 with a fixed block 012, insert the fixed block 012 into the sink groove of the drill collar, and the slot 013 of the fixed block 012 is stuck on the boss, and then connect the other semicircular ring 011.

[0068] In one embodiment, both ends of the screw 02 are respectively connected to a bearing seat assembly 05, and each bearing seat assembly 05 is connected to a corresponding semicircular ring 011; one end of the screw 02 extends out of the bearing seat assembly 05, and this end of the screw 02 is fixedly connected to a polygonal rotating head.

[0069] In this embodiment, both ends of the lead screw 02 are connected to the corresponding semicircular rings 011 through the bearing seat assembly 05, and the bearing seat assembly 05 is fixed to the corresponding semicircular rings 011 by screws. For example, the bearing seat assembly 05 is fixed to the two upper semicircular rings 011 of the two fixed brackets 01 by screws; the setting of the polygonal rotating head facilitates the use of an electric drill and a sleeve tool to drive the polygonal rotating head to rotate. When using an electric drill and a sleeve tool, the polygonal rotating head maintains axial positioning with the lead screw 02 through a flat key.

[0070] When the disassembly tool of this embodiment is used, Figure 15 As shown, when the sliding cover needs to be installed, rotate the screw 02 to rotate the ball nut 03 to the initial end of the sink groove, install the push block 044 on the fixed seat 07, fix the pressure plate on the fixed seat 07, and the sliding cover slides from the initial end of the dovetail groove into the dovetail groove and the sink groove. Rotate the screw 02, and the fixed seat 07 drives the push block 044 to push the sliding cover from the back along the axis of the drill collar to the end of the dovetail groove and the sink groove, and then rotate the screw 02 in the opposite direction to reset the position of the push block 044; repeat the above operations for subsequent sliding cover installation.

[0071] like Figure 16As shown, when the sliding cover needs to be removed, the screw 02 is rotated to rotate the ball nut 03 to the sliding cover, the front pull block 041 is installed on the fixed seat 07, the pressure plate is fixed to the fixed seat 07, and the screw 02 is rotated. The fixed seat 07 drives the top screw 043 of the front pull block 041 to pull the blind hole of the sliding cover along the axis of the drill collar to the initial end of the sink. The front pull block 041 is then removed, the screw 02 is rotated in the opposite direction, and the position of the fixed seat 07 is adjusted so that the top screw 043 of the front pull block 041 is positioned in the blind hole of the next sliding cover. The above operation can be repeated for subsequent sliding cover removal. It should be noted that the front pull block 041 can also be used to install the sliding cover.

[0072] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0073] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A tool for disassembling and assembling a sliding cover in a well logging instrument, characterized in that: include: two fixing brackets, at least one of which is capable of being fixed on a drill collar; A screw and a ball nut cooperate with each other, with both ends of the screw respectively cooperating with the corresponding fixing brackets so that the screw is limited between the two fixing brackets, the axis of the screw is parallel to the axis of the drill collar, and the screw can rotate around its own axis to drive the ball nut to move; The disassembly block is configured such that the movement of the ball nut can drive the movement of the disassembly block, the disassembly block cooperates with the sliding cover in the sink groove of the drill collar, and the movement of the disassembly block can drive the sliding cover to move in the sink groove.

2. The disassembly and assembly tool for the sliding cover in the well logging instrument according to claim 1, characterized in that: The disassembly and assembly block includes a front pulling block, and the ball nut can be detachably connected to the front pulling block. After the ball nut is connected to the front pulling block, the movement state of the front pulling block along the axis of the drill collar is the same as the movement state of the ball nut along the axis of the drill collar; two top screws are fixedly connected to the front pulling block, and each of the top screws can be extended into the blind hole of the sliding cover. The movement of the front pulling block pulls the sliding cover to move through the top screws.

3. The disassembly and assembly tool for the sliding cover in the logging instrument according to claim 2, characterized in that: The disassembly block also includes a push block, and the ball nut can also be connected to the push block. After the ball nut is connected to the push block, the movement state of the push block along the axis of the drill collar is the same as the movement state of the ball nut along the axis of the drill collar. Along the moving direction of the ball nut, when the push block is located behind the sliding cover, the movement of the push block can push the sliding cover to move.

4. The tool for disassembling and assembling the sliding cover of the well logging instrument according to claim 3, characterized in that: Two vertical teeth are fixedly connected to the rear push block, and the two vertical teeth can be inserted into the sink groove at the same time. A push block is connected between the two vertical teeth, and the push block has a push contact surface perpendicular to the axis of the drill collar, and the push contact surface contacts the corresponding side surface of the sliding cover in the sink groove.

5. The disassembly and assembly tool for the sliding cover in the logging instrument according to claim 3, characterized in that: The ball nut is fixedly connected to a mounting seat, the mounting seat is fixedly connected to a fixing seat, the fixing seat is detachably connected to the front pull block, and the fixing seat is detachably connected to the rear push block.

6. The disassembly and assembly tool for the sliding cover in the well logging instrument according to claim 5, characterized in that: A guide connecting rod is provided on each side of the screw, and a through hole is provided on the mounting seat for the two guide connecting rods to pass through. The two ends of each guide connecting rod passing through the through hole are fixedly connected to the corresponding fixed bracket respectively, and the axis of each guide connecting rod is parallel to the axis of the drill collar.

7. The tool for disassembling and assembling the sliding cover of the well logging instrument according to claim 5, characterized in that: There are two fixing seats, each of which is fixedly connected to two ear blocks, and each ear block is fixedly connected to the mounting seat through a threaded connection; each fixing seat is provided with a groove, and the front pulling block and the rear pushing block are fixedly connected with a protrusion that cooperates with the groove.

8. The tool for disassembling and assembling the sliding cover of the well logging instrument according to claim 7, characterized in that: Taking the front pull block and the rear push block located above the sink as an example, the groove extends from the upper end of the fixed seat to the middle of the fixed seat, and the protrusion is inserted into the groove from the upper end of the groove. Each of the fixed seats is rotatably connected to a pressure plate, and the pressure plate is used to press the protrusion into the groove.

9. The tool for disassembling and assembling the sliding cover of the well logging instrument according to claim 1, characterized in that: Each of the fixing brackets includes two semicircular rings, and the two semicircular rings of each fixing bracket are connected to form a circular ring that can be sleeved on the drill collar; one of the semicircular rings is fixedly connected to a fixed clamping block, and the fixed clamping block is gap-matched with the sink groove, and the fixed clamping block is provided with a clamping groove that cooperates with the boss in the sink groove of the drill collar.

10. The tool for disassembling and assembling the sliding cover of the well logging instrument according to claim 9, characterized in that: Both ends of the lead screw are respectively connected to bearing seat assemblies, and each bearing seat assembly is connected to the corresponding semicircular ring; one end of the lead screw extends out of the bearing seat assembly, and this end of the lead screw is fixedly connected to a polygonal rotating head.

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