A multi-directional impact unblocking method for well logging and its dynamic caliper instrument

Abstract

The present invention discloses a multi-directional impact unblocking method for well logging and a power caliper instrument thereof. First, the motor drives the buffer system to move axially in the forward direction through a screw rod, and at the same time, the energy storage mechanism continuously stores energy, and is unlocked through a tooth unlocking system, so that the energy storage mechanism is released instantly, and the impact arm is driven to impact the well wall for the first time; then, the motor drives each part to move the tooth in the reverse axial direction through a screw rod, and then stores energy in the forward direction, and retracts the impact arm of the first impact, and after storing energy to a certain distance, it is rotated clockwise through a transfer mechanism to align with the next group of impact arms, and after the transfer is completed, the unlocking action is repeated to complete the second impact. The present invention achieves the effect of unblocking by the linkage cooperation of the power part, the buffer part, the tooth unlocking part, the transfer part, the energy storage part, the impact part and the reset part, so that each impact arm impacts the well wall in multiple directions for multiple times, thereby effectively reducing the loss of operation time caused by jamming and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the field of well logging, in particular to a multi-directional impact jamming release method for well logging and a dynamic caliper instrument thereof. Background Art

[0002] In logging operations, whether the instrument can be smoothly lowered to the designed measurement section is a prerequisite for completing the logging operation. When the well inclination is large, the logging instrument almost lies on the well wall during operation. The friction between the instrument and the well wall is large, and it is easy to get stuck, thus affecting the progress of the logging operation and causing time loss. In addition, the logging instrument is in an eccentric state in the well and cannot meet the requirements of centered measurement, which affects work efficiency to a certain extent. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a multi-directional impact unblocking method for well logging and a dynamic wellbore instrument thereof, which can effectively reduce the loss of operation time caused by eccentric jamming and improve work efficiency.

[0004] Technical solution: To achieve the above purpose, the present invention provides a multi-directional impact unblocking method for well logging and a dynamic caliper instrument thereof, which uses a dynamic caliper instrument for well logging, specifically comprising the following steps:

[0005] Step I, perform the first impact: first, the motor drives the buffer system to move in the forward axial direction through the screw rod, and at the same time, the hanging gear unlocking system drives the energy storage mechanism to continuously store energy. After the buffer system moves a certain distance, the hanging gear unlocking system is unlocked, and the energy storage mechanism is released instantly, driving the impact arm to perform the first impact on the well wall;

[0006] Step II, perform the second impact: first, the motor drives the buffer system, the tooth unlocking system and the indexing mechanism through the screw rod to reverse the axial movement, and then the tooth is hung. After the tooth is hung, it rotates forward to store energy, and the impact arm of the first impact is retracted through the reset system. After the energy is stored to a certain distance, the impact block is rotated clockwise through the indexing mechanism to align with the next group of impact arms. After the indexing is completed, repeat step I to complete the second impact;

[0007] Step III, perform multiple impacts: Repeat step II multiple times until the card release operation is completed;

[0008] Step IV, stop impacting: follow step II until the transfer is completed.

[0009] Furthermore, it includes an instrument string body, which includes a cylindrical shell, a motor is arranged inside the shell, the motor is fixed axially along the shell by a first inner support, and the output shaft of the motor is connected to the screw rod in a transmission manner; the screw rod is arranged axially along the shell, and the screw rod is fixed to the first inner support member by a first fixing block, an axial hole for the screw rod to pass through is opened on the first fixing block, the screw rod cooperates with the axial hole through a bearing to rotate relatively, and a first moving block is arranged at the tail end of the screw rod by threaded cooperation; a plurality of first limit blocks are arranged on the outer side surface of the first moving block, and a first axial groove for the first limit block to slide is correspondingly arranged on the first inner support member; the first moving block is connected to the buffer system by threaded cooperation, and the buffer system is sleeved on the central axis, the central axis is arranged along the central axis of the shell, and the central axis is fixed to the lower end of the first inner support member.

[0010] Further, the upper end of the screw rod is supported on the upper end surface of the first fixing block through a nut, a nut is provided on the screw rod in cooperation with the thread, and the nut is screwed on the lower end surface of the first fixing block; a drag reduction structure is provided between the first fixing block and the nut and the nut; the drag reduction structure comprises an upper gasket and a lower gasket, and a roller group is provided between the upper gasket and the lower gasket; the roller group comprises a plurality of cylindrical rollers, and the rollers are provided around the screw rod;

[0011] A first moving block locking device is fixedly provided on the first inner support member, and the first moving block locking device comprises a slideway fixedly provided on the first inner support member, a slide rod is slidably provided in the slideway, the slide rod moves axially along the screw rod, the lower end of the slide rod is fixed on the first moving block, and when the slide rod is fully inserted into the slideway, the slide rod is fixed to the lower end of the slideway by threaded cooperation;

[0012] A deceleration buffer structure is arranged on one side of the first moving block, and the deceleration buffer structure comprises an upper deceleration member and a lower deceleration member, the upper deceleration member is arranged at the starting end of the moving stroke of the first moving block, and the lower deceleration member is arranged at the end end of the moving stroke of the first moving block.

[0013] Further, the buffer system includes a first transmission rod fixed to the first moving block by a threaded connection, an extrusion sleeve is arranged at the lower end of the first transmission rod, and the outer wall of the extrusion sleeve is slidably arranged in contact with the inner wall of the shell; the extrusion sleeve pushes the upper buffer, and the lower end of the upper buffer is supported on the disc part at the bottom end of the top pressure block, and the outer wall of the disc part is slidably arranged in contact with the inner wall of the extrusion sleeve; the upper buffer is sleeved on the outer side of the columnar part above the disc part; the top pressure block is sleeved on the central axis;

[0014] The top pressure block pushes the lower buffer, the lower end of the lower buffer is supported on the positioning block, the positioning block is fixed to the inner wall of the extrusion sleeve by a threaded connection, the lower buffer is sleeved on the outer side of the top end of the second transmission rod, the second transmission rod is fixed under the top pressure block, and the second transmission rod is sleeved on the central axis; the positioning block is provided with a through hole for the second transmission rod to pass through.

[0015] Further, the hanging tooth unlocking system includes a rotating tooth structure and a hanging tooth structure, the rotating tooth structure includes a multi-stage sleeve fixed on the second transmission rod, the multi-stage sleeve is connected to the rotating tooth through a torsion spring, the torsion spring and the rotating tooth are both sleeved on the multi-stage sleeve, the rotating tooth is axially fixed relative to the multi-stage sleeve, and the rotating tooth is rotatably arranged relative to the multi-stage sleeve;

[0016] The rotating gear comprises a rotating seat sleeved on the multi-stage sleeve, and a plurality of teeth arranged around the rotating seat, wherein the teeth are used to hang the hanging tooth structure;

[0017] An unlocking block is arranged on the outer side wall of the rotating seat, the upper end surface of the unlocking block moves along the lower end surface of the unlocking driving block, the contact surfaces of the unlocking block and the unlocking driving block are both arc surfaces inclined upward counterclockwise, the unlocking driving block is fixed on the second inner support member, and the second inner support member is fixedly arranged relative to the outer shell;

[0018] The upper end surface of the tooth is a plane, and the lower end surface of the tooth is an arc surface inclined upward in a clockwise direction.

[0019] Further, the hanging tooth structure includes a plurality of hanging arms arranged corresponding to the teeth, a cylindrical protrusion is arranged at the end of the hanging arm, the protrusion is used to hook the teeth, the hanging arm is fixed on the mounting sleeve, the mounting sleeve is sleeved on the top of the movable sleeve, and the mounting sleeve is fixed relative to the movable sleeve, the movable sleeve is sleeved on the second transmission rod; the lower end of the mounting sleeve is fixedly connected to a transfer mechanism, the lower end of the transfer mechanism is provided with an impact block, the impact block is used to trigger the impact system; the transfer mechanism is sleeved on the movable sleeve; the mounting sleeve is fixedly connected to the energy storage mechanism, and the energy storage mechanism is sleeved on the outside of the transfer mechanism;

[0020] The hanging arm is slidably arranged along a second axial groove, the second axial groove is axially arranged along the central axis, and the second axial groove is opened on the second inner support member.

[0021] Further, the indexing mechanism comprises an upper indexing sleeve, a lower indexing sleeve and a plurality of indexing stop pins, the upper indexing sleeve is fixedly connected to the mounting sleeve, a plurality of third axial grooves are provided on the upper indexing sleeve corresponding to the plurality of indexing stop pins, the indexing stop pins slide in the third axial grooves, the indexing stop pins are fixed on a second fixed block, and the second fixed block is fixed relative to the housing; a spring is provided between the lower end of the lower indexing sleeve and the lower end of the movable sleeve;

[0022] The contact ends of the upper transfer sleeve and the lower transfer sleeve are both surrounded by a plurality of transfer surfaces, the transfer surfaces are arc surfaces inclined upward clockwise, and the lower end of the upper transfer sleeve is just engaged with the lower transfer sleeve;

[0023] Furthermore, the energy storage mechanism includes an energy storage rod fixed on the mounting sleeve, the energy storage rod moves axially along the central axis, the bottom end of the energy storage rod is a disc-shaped support block, and an energy storage spring is arranged between the support block and the second fixed block.

[0024] Furthermore, the impact system includes a plurality of impact arms, and the plurality of impact arms are arranged in multiple directions around the outer wall of the shell, and the shell is provided with a receiving groove for accommodating the impact arm; the movable end of the impact arm is arranged corresponding to the outlet for the impact block to impact, and the other end of the impact arm is hinged to the reset system; the impact arm includes two sections hinged to each other, and a roller is provided at the hinge.

[0025] Furthermore, the reset system includes a plurality of reset units arranged corresponding to the plurality of impact arms, the shell of the reset unit is fixed to the outer shell by a pin, a reset spring is arranged in the reset unit shell, the upper end of the reset spring is connected to a push rod, and the movable end of the push rod is hinged to the lower end of the impact arm.

[0026] Beneficial effects: The multi-directional impact unjamming method for well logging and the powered wellbore instrument thereof of the present invention, through the multi-directional support of each impact arm on the well wall, so that the entire instrument string can perform the measurement work in the center, which can effectively reduce the loss of operation time caused by eccentricity and improve work efficiency; through the linkage and coordination of the power part, the buffer part, the hanging tooth unlocking part, the transfer part, the energy storage part, the impact part and the reset part, each impact arm can impact the well wall in multiple directions for multiple times, so as to achieve the effect of unjamming, which can effectively reduce the loss of operation time caused by sticking and further improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a block diagram of the multi-directional impact card-solving method;

[0028] Attached Figure 2 This is the external structure diagram of the instrument string body;

[0029] Attached Figure 3 It is the transmission relationship diagram of the power and transmission parts;

[0030] Attached Figure 4 This is a partial structural diagram of the power and transmission parts;

[0031] Attached Figure 5 It is the structural diagram of the buffer system;

[0032] Attached Figure 6 is a structural diagram of the drag reduction structure;

[0033] Attached Figure 7 It is a structural diagram of the tooth unlocking system;

[0034] Attached Figure 8 It is the structural diagram of the rotating gear;

[0035] Attached Fig. 9 It is a structural diagram of the hanging tooth structure;

[0036] Attached Fig.10 It is the structural diagram of the indexing mechanism;

[0037] Attached Fig.11 It is the structural diagram of the energy storage mechanism;

[0038] Attached Fig.12 This is the structural diagram of the impact system;

[0039] Attached Fig.13 This is a structural diagram of the reset system. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] As attached Figure 1-13 The multi-directional impact unblocking method for well logging and the power caliper instrument thereof use the power caliper instrument to perform well logging, specifically comprising the following steps:

[0042] Step I, perform the first impact: first, the motor 3 drives the buffer system 10 through the screw 4 to move in the forward axial direction, and at the same time, the hanging tooth unlocking system 19 drives the energy storage mechanism 30 to continuously store energy. After the buffer system 10 moves a certain distance, the hanging tooth unlocking system 19 is unlocked, and the energy storage mechanism 30 is released instantly, driving the impact arm 29-1 to impact the well wall for the first time;

[0043] Step II, performing the second impact: first, the motor 3 drives the buffer system 10, the tooth unlocking system 19 and the indexing mechanism 27 through the screw rod 4 to reverse the axial movement to perform tooth hanging. After tooth hanging, it rotates forward to store energy, and the impact arm 29-1 of the first impact is retracted through the reset system 36. After the energy is stored to a certain distance, the impact block 28 is indexed clockwise through the indexing mechanism 27 to align with the next group of impact arms 29-1. After the indexing is completed, step I is repeated to complete the second impact;

[0044] Step III, perform multiple impacts: Repeat step II multiple times until the card release operation is completed;

[0045] Step IV, stop impacting: follow step II until the transfer is completed.

[0046] The utility model comprises an instrument string body 1, wherein the instrument string body 1 comprises a cylindrical shell 2, and hooks 2-1 are arranged at both ends of the shell 2 for externally connecting other logging equipment; a motor 3 is arranged inside the shell 2, and the motor 3 is fixed axially along the shell 2 through a first inner support member 6, and the output shaft of the motor 3 is connected to the screw rod 4 by transmission; the screw rod 4 is arranged axially along the shell 2, and the screw rod 4 is fixed to the first inner support member 6 through a first fixing block 5, and an axial hole for the screw rod 4 to pass through is opened on the first fixing block 5, and the screw rod 4 is relatively rotated by cooperating with the axial hole through a bearing, and a first moving block 7 is arranged at the tail end of the screw rod 4 through threaded cooperation; a plurality of first limit blocks 8 are arranged on the outer side surface of the first moving block 7, and a first axial groove 9 for the first limit block 8 to slide is correspondingly arranged on the first inner support member 6; the first moving block 7 is connected to the buffer system 10 through threaded cooperation, and the buffer system 10 is sleeved on the central axis 11, and the central axis 11 is arranged along the central axis of the shell, and the central axis 11 is fixed to the lower end of the first inner support member 6;

[0047] The first fixed block is used to prevent the lead screw from moving axially to ensure stable transmission; the first limit block cooperates with the first axial groove to limit the rotational freedom of the first movable block, and on this basis, the first movable block cooperates with the thread of the lead screw to convert the rotational power provided by the electrode into axial power to meet the driving requirements of the instrument string; the central axis is fixed to the lower end of the first inner support member as a guiding basis for the movement of each part, which facilitates the mutual cooperation between the parts and makes the structure compact and reasonable.

[0048] The upper end of the screw rod 4 is supported on the upper end surface of the first fixing block 5 through a nut, and a nut is provided on the screw rod 4 in a threaded manner, and the nut is screwed on the lower end surface of the first fixing block 5; a drag reduction structure 12 is provided between the first fixing block 5 and the nut and the nut; Figure 6As shown, the drag reduction structure 12 includes an upper gasket 12-1 and a lower gasket 12-2, and a roller group 12-3 is arranged between the upper gasket 12-1 and the lower gasket 12-2; the roller group 12-3 includes a plurality of cylindrical rollers 12-4, and the rollers 12-4 are arranged around the screw rod 4;

[0049] The sliding friction between the fixed block, the lead screw and the nut is converted into rolling friction through the drag reduction structure, which effectively reduces energy loss and improves transmission efficiency.

[0050] As attached Figure 4 As shown, a first moving block locking device 13 is fixedly provided on the first inner support member 6, and the first moving block locking device 13 comprises a slideway 13-1 fixedly provided on the first inner support member 6, a slide bar 13-2 is slidably provided in the slideway 13-1, the slide bar 13-2 moves axially along the screw rod 4, the lower end of the slide bar 13-2 is fixed on the first moving block 7, and when the slide bar 13-2 is fully inserted into the slideway 13-1, the slide bar 13-2 is fixed to the lower end of the slideway 13-1 through threaded cooperation;

[0051] By setting the first moving block locking device as a means of instrument protection, the first moving block can be fixed by the device during transportation and when not in use to prevent unnecessary wear and collision, effectively prolonging the service life of the instrument and saving costs.

[0052] A deceleration buffer structure 14 is provided on one side of the first moving block 7. The deceleration buffer structure 14 includes an upper deceleration component 14-1 and a lower deceleration component 14-2. The upper deceleration component 14-1 is provided at the starting end of the moving stroke of the first moving block 7, and the lower deceleration component 14-2 is provided at the end end of the moving stroke of the first moving block 7. Through the deceleration buffer structure, the first moving block can be effectively decelerated at the starting end and the end end of the moving stroke to prevent collision due to inertia.

[0053] The buffer system 10 includes a first transmission rod 15 fixed to the first moving block 7 by a threaded connection, an extrusion sleeve 16 is arranged at the lower end of the first transmission rod 15, and the outer wall of the extrusion sleeve 16 is slidably arranged in contact with the inner wall of the housing 2; the extrusion sleeve 16 pushes the upper buffer 10-1, and the lower end of the upper buffer 10-1 is supported on the disc part 17-1 at the bottom end of the top pressure block 17, and the outer wall of the disc part 17-1 is slidably arranged in contact with the inner wall of the extrusion sleeve 16; the upper buffer 10-1 is sleeved on the outer side of the columnar part 17-2 above the disc part 17-1; the top pressure block 17 is sleeved on the central shaft 11;

[0054] The top pressure block 17 pushes the lower buffer 10-2, the lower end of the lower buffer 10-2 is supported on the positioning block 16-1, the positioning block 16-1 is fixed to the inner wall of the extrusion sleeve 16 by threaded connection, the lower buffer 10-2 is sleeved on the outer side of the top end of the second transmission rod 18, the second transmission rod 18 is fixed below the top pressure block 17, and the second transmission rod 18 is sleeved on the central shaft 11; the positioning block 16-1 is provided with a through hole for the second transmission rod 18 to pass through;

[0055] The upper buffer member 10 - 1 and the lower buffer member 10 - 2 are both formed by trumpet-shaped annular elastic rings stacked on each other; the upper and lower groups of buffer members are provided, which has a better buffering effect and is separated from each other, thereby achieving hierarchical multi-level drag reduction.

[0056] The hanging tooth unlocking system 19 includes a rotating tooth structure 20 and a hanging tooth structure 21. The rotating tooth structure 20 includes a multi-stage sleeve 22 fixed on the second transmission rod 18. The multi-stage sleeve 22 is connected to the rotating tooth 24 through a torsion spring 23. The torsion spring 23 and the rotating tooth are both sleeved on the multi-stage sleeve 22. The rotating tooth 24 is axially fixed relative to the multi-stage sleeve 22, and the rotating tooth 24 is rotatably arranged relative to the multi-stage sleeve 22. The purpose of arranging the torsion spring is to make the rotating tooth pushed by the hanging tooth structure to rotate and dislocate. After the hanging tooth structure passes, the rotating tooth can quickly return to its position and just hook the hanging tooth structure to achieve the hanging tooth effect.

[0057] The rotating tooth 24 includes a rotating seat 24-1 sleeved on the multi-stage sleeve 22, and a plurality of teeth 24-2 arranged around the rotating seat 24-1, and the teeth 24-2 are used to hang the hanging tooth structure 21;

[0058] An unlocking block 37 is disposed on the outer wall of the rotating seat 24-1, and the upper end surface of the unlocking block 37 moves along the lower end surface of the unlocking driving block 38. The contact surfaces of the unlocking block 37 and the unlocking driving block 38 are both arc surfaces inclined upward counterclockwise. The unlocking driving block 38 is fixed on the second inner support member 32, and the second inner support member 32 is fixed relative to the outer shell 2;

[0059] Through the arc surface tilted upward counterclockwise, the axial movement of the rotating gear structure can be converted into the rotation of the rotating gear, so that the tooth and the hanging tooth structure are misaligned to achieve the unlocking effect.

[0060] The upper end surface of the tooth 24-2 is a plane, which is conducive to better hooking the hanging tooth structure and will not be hindered when unlocking; the lower end surface of the tooth 24-2 is an arc surface inclined upward in a clockwise direction, which is convenient for converting the thrust applied to the arc surface by the hanging tooth structure 21 into a thrust to drive the rotating tooth to rotate when hanging the tooth, thereby causing the rotating tooth to rotate out of position and finally achieving the effect of hanging the tooth.

[0061] The tooth structure 21 includes a plurality of hanging arms 21-1 corresponding to the teeth 24-2, a cylindrical protrusion 21-2 is provided at the end of the hanging arm 21-1, and the protrusion 21-2 is used to hook the teeth 24-2, and the hanging arm 21-1 is fixed on the mounting sleeve 25, and the mounting sleeve 25 is sleeved on the top of the moving sleeve 26, and the mounting sleeve 25 is fixed relative to the moving sleeve 26, and the moving sleeve 26 is sleeved on the second transmission rod 18; the lower end of the mounting sleeve 25 is fixedly connected to a transfer mechanism 27, and the lower end of the shifting mechanism 27 is provided with an impact block 28, and the impact block 28 is used to trigger the impact system 29; the shifting mechanism 27 is sleeved on the moving sleeve 26; the energy storage mechanism 30 is fixedly connected to the mounting sleeve 25, and the energy storage mechanism 30 is sleeved on the outside of the shifting mechanism 27;

[0062] The cylindrical protrusion is smoother during the tooth hanging process; by installing the shaft sleeve as a transmission part, the indexing mechanism and the energy storage mechanism can move synchronously with the tooth hanging unlocking system, specifically, the energy can continue to be stored during the unlocking process until the energy is released after the unlocking is completed, so as to maximize the impact force; after completing one impact, the indexing mechanism completes the indexing during the next impact energy storage process, and the working time of each component is reasonably superimposed on each other, which effectively improves the work efficiency; the energy storage mechanism and the indexing mechanism are superimposed and nested, and they complement each other, making the structure compact, so as to shorten the length of the instrument string and avoid the defect of reduced rigidity caused by excessive length.

[0063] The hanging arm 21-1 is slidably arranged along the second axial groove 31, and the second axial groove 31 is axially arranged along the center axis 11, and the second axial groove 31 is opened on the second inner support member 32; through the restriction of the hanging arm and the second axial groove, the hanging tooth structure can only move axially, avoiding the relative rotation between the rotating tooth structure and the hanging tooth structure and failing to complete the hanging tooth.

[0064] The indexing mechanism 27 includes an upper indexing sleeve 27-1, a lower indexing sleeve 27-2 and a plurality of indexing stop pins 27-3. The upper indexing sleeve 27-1 is fixedly connected to the mounting sleeve 25. A plurality of third axial grooves 27-4 are provided on the upper indexing sleeve 27-1 corresponding to the plurality of indexing stop pins 27-3. The indexing stop pins 27-3 slide in the third axial grooves 27-4. The indexing stop pins 27-3 are fixed on a second fixed block 33. The second fixed block 33 is fixed relative to the housing 2. A spring is provided between the lower end of the lower indexing sleeve 27-2 and the lower end of the movable sleeve 26.

[0065] The contact ends of the upper transfer sleeve 27-1 and the lower transfer sleeve 27-2 are surrounded by a plurality of transfer surfaces 27-5, the transfer surfaces 27-5 are clockwise inclined upward arc surfaces, and the lower end of the upper transfer sleeve 27-1 is just meshed with the lower transfer sleeve 27-2;

[0066] During the impact, the upper rotation sleeve is driven by the installing sleeve to move axially, contact the lower rotation sleeve, and then move one end distance so that the two ports are just meshed. At this time, the upper rotation sleeve pushes the lower rotation sleeve to move axially, so that the spring between the lower end of the lower rotation sleeve and the moving sleeve is compressed; during the second impact energy storage process, the upper rotation sleeve is driven by the installing sleeve to move axially in the positive direction, and the lower rotation sleeve also follows the axial movement of the upper rotation sleeve under the action of the spring thrust until the rotation stop pin blocks the lower rotation sleeve, and the lower rotation sleeve is separated from the upper rotation sleeve shaft. At this time, the top of the rotation surface of the lower rotation sleeve contacts the rotation stop pin, and the spring has not yet recovered its original length and still has thrust, so the spring pushes the lower rotation sleeve to continue to move upward, so that the rotation surface fits the rotation stop pin and moves, thereby causing the lower rotation sleeve to rotate clockwise, so that the impact block is aligned with the next impact arm to achieve rotation.

[0067] The energy storage mechanism 30 includes an energy storage rod 34 fixed on the mounting sleeve 25, the energy storage rod 34 moves axially along the central axis 11, the bottom end of the energy storage rod 34 is a disc-shaped support block 34-1, and an energy storage spring is arranged between the support block 34-1 and the second fixed block 33;

[0068] The installation sleeve is used to transmit power to drive the energy storage rod to move along the positive rotation axis, so that the support block gradually approaches the second fixed block, compressing the energy storage spring to achieve the energy storage effect.

[0069] The impact system 29 includes a plurality of impact arms 29-1, which are arranged in multiple directions around the outer wall of the housing 2. The housing 2 is provided with a receiving groove 29-2 for receiving the impact arm 29-1. The movable end of the impact arm 29-1 is arranged corresponding to the outlet for the impact block 28 to impact. The other end of the impact arm 29-1 is hinged to the reset system 36. The impact arm 29-1 includes two sections hinged to each other, and a roller 29-3 is provided at the hinge.

[0070] By providing a accommodating groove, the impact arm can be better accommodated, and it can be fixed by a safety pin during transportation, so as to better protect the impact arm; by adopting a two-stage structure hinged to each other, when the movable end is subjected to a severe impact, the hinge will quickly bend and hit outward, which can produce a better impact effect; the purpose of setting the roller is that, firstly, since the surface material of the roller is mostly rubber, it has a certain buffering effect and the wear and replacement cost is low; secondly, when the impact arm is supported on the well wall as a support arm, the roller can help the movement of the instrument string in the well.

[0071] The reset system 36 includes a plurality of reset units 36-1 corresponding to the plurality of impact arms 29-1. The housing of the reset unit 36-1 is fixed to the housing 2 by a pin. A reset spring 36-2 is arranged in the housing of the reset unit 36-1. The upper end of the reset spring 36-2 is connected to a push rod 36-3. The movable end of the push rod is hinged to the lower end of the impact arm 29-1.

[0072] The spring is used as a reset structure installed at the end of the instrument string, which not only achieves the reset effect but also has a certain buffering effect.

[0073] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the above principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A multi-directional impact unblocking method for well logging, Features: It includes a powered caliper instrument, which is used for well logging; The power caliper instrument comprises an instrument string body (1), the instrument string body (1) comprising a cylindrical outer shell (2), a motor (3) being arranged inside the outer shell (2), the motor (3) being fixed axially along the outer shell (2) via a first inner support member (6), the output shaft of the motor (3) being drivingly connected to a screw rod (4); the screw rod (4) being arranged axially along the outer shell (2), the screw rod (4) being fixed to the first inner support member (6) via a first fixing block (5), the first fixing block (5) being provided with an axial hole for the screw rod (4) to pass through, the screw rod (4) being connected to the outer shell (2) via an axial hole. The bearing cooperates with the axial hole to rotate relatively, and the tail end of the screw rod (4) is provided with a first moving block (7) through threaded cooperation; a plurality of first limit blocks (8) are provided on the outer side surface of the first moving block (7), and a first axial groove (9) for sliding of the first limit block (8) is correspondingly provided on the first inner support member (6); the first moving block (7) is connected to the buffer system (10) through threaded cooperation, and the buffer system (10) is sleeved on the central shaft (11), and the central shaft (11) is arranged along the central axis of the shell, and the central shaft (11) is fixed to the lower end of the first inner support member (6); The upper end of the screw rod (4) is supported on the upper end surface of the first fixed block (5) through a nut, and a nut is provided on the thread of the screw rod (4), and the nut is screwed on the lower end surface of the first fixed block (5); a drag reduction structure (12) is provided between the first fixed block (5) and the nut and the nut; the drag reduction structure (12) comprises an upper gasket (12-1) and a lower gasket (12-2), and a roller group (12-3) is provided between the upper gasket (12-1) and the lower gasket (12-2); the roller group (12-3) comprises a plurality of cylindrical rollers (12-4), and the rollers (12-4) are arranged around the screw rod (4); a first moving block locking device (13) is fixedly provided on the first inner support member (6), and the first moving block locking device (13) comprises a roller fixedly provided on the first inner support member (6); A slideway (13-1), a slide bar (13-2) is slidably arranged in the slideway (13-1), the slide bar (13-2) moves axially along the screw rod (4), the lower end of the slide bar (13-2) is fixed on the first moving block (7), and when the slide bar (13-2) is fully inserted into the slideway (13-1), the slide bar (13-2) and the lower end of the slideway (13-1) are fixed by threaded engagement; a deceleration buffer structure (14) is arranged on one side of the first moving block (7), the deceleration buffer structure (14), the deceleration buffer structure (14) comprises an upper deceleration component (14-1) and a lower deceleration component (14-2), the upper deceleration component (14-1) is arranged at the starting end of the moving stroke of the first moving block (7), and the lower deceleration component (14-2) is arranged at the end end of the moving stroke of the first moving block (7); The buffer system (10) comprises a first transmission rod (15) fixed to the first moving block (7) by a threaded connection, an extrusion sleeve (16) is arranged at the lower end of the first transmission rod (15), and the outer wall of the extrusion sleeve (16) is slidably arranged in contact with the inner wall of the outer shell (2); the extrusion sleeve (16) pushes the upper buffer (10-1), and the lower end of the upper buffer (10-1) is supported on a disc portion (17-1) at the bottom end of the top pressure block (17), and the outer wall of the disc portion (17-1) is slidably arranged in contact with the inner wall of the extrusion sleeve (16); the upper buffer (10-1) is sleeved on a columnar portion (17-1) above the disc portion (17-1). -2) outside; the push block (17) is sleeved on the central shaft (11); the push block (17) pushes the lower buffer (10-2); the lower end of the lower buffer (10-2) is supported on the positioning block (16-1); the positioning block (16-1) is fixed to the inner wall of the extrusion sleeve (16) by threaded connection; the lower buffer (10-2) is sleeved on the outer side of the top end of the second transmission rod (18); the second transmission rod (18) is fixed below the push block (17); the second transmission rod (18) is sleeved on the central shaft (11); the positioning block (16-1) is provided with a through hole for the second transmission rod (18) to pass through; The tooth unlocking system (19) comprises a rotating tooth structure (20) and a hanging tooth structure (21), wherein the rotating tooth structure (20) comprises a multi-stage shaft sleeve (22) fixed on the second transmission rod (18), wherein the multi-stage shaft sleeve (22) is connected to a rotating tooth (24) via a torsion spring (23), wherein the torsion spring (23) and the rotating tooth are both sleeved on the multi-stage shaft sleeve (22), wherein the rotating tooth (24) is axially fixed relative to the multi-stage shaft sleeve (22), and wherein the rotating tooth (24) is rotatably arranged relative to the multi-stage shaft sleeve (22); wherein the rotating tooth (24) comprises a rotating seat (24-1) sleeved on the multi-stage shaft sleeve (22), and a rotating member (24-2) surrounding the rotating seat (24-3). -1) is provided with a plurality of teeth (24-2), the teeth (24-2) being used to hang the hanging tooth structure (21); an unlocking block (37) is provided on the outer wall of the rotating seat (24-1), the upper end surface of the unlocking block (37) moves along the lower end surface of the unlocking driving block (38), the contact surfaces of the unlocking block (37) and the unlocking driving block (38) are both arc surfaces inclined upward in a counterclockwise direction, the unlocking driving block (38) is fixed on the second inner support member (32), and the second inner support member (32) is fixedly arranged relative to the outer shell (2); the upper end surface of the teeth (24-2) is a plane, and the lower end surface of the teeth (24-2) is an arc surface inclined upward in a clockwise direction; The method for logging using a dynamic caliper instrument specifically comprises the following steps: Step I, performing the first impact: first, the motor (3) drives the buffer system (10) through the screw rod (4) to move in the forward axial direction, and at the same time, the hanging tooth unlocking system (19) drives the energy storage mechanism (30) to continuously store energy. After the buffer system (10) moves a certain distance, the hanging tooth unlocking system (19) is unlocked, and the energy storage mechanism (30) is released instantly, driving the impact arm (29-1) to perform the first impact on the well wall; Step II, performing a second impact: first, the motor (3) drives the buffer system (10), the tooth unlocking system (19) and the indexing mechanism (27) through the screw rod (4) to reverse the axial movement to perform toothing. After toothing, the system rotates forward to store energy, and the impact arm (29-1) of the first impact is retracted through the reset system (36). After the energy is stored to a certain distance, the impact block (28) is indexed clockwise through the indexing mechanism (27) to align with the next group of impact arms (29-1). After the indexing is completed, step I is repeated to complete the second impact. Step III, perform multiple impacts: Repeat step II multiple times until the card release operation is completed; Step IV, stop impacting: follow step II until the transfer is completed.

2. A multi-directional impact unblocking method for well logging according to claim 1, Features: The tooth hanging structure (21) comprises a plurality of hanging arms (21-1) arranged corresponding to the teeth (24-2), a cylindrical protrusion (21-2) being arranged at the end of each hanging arm (21-1), the protrusion (21-2) being used to hook the teeth (24-2), the hanging arm (21-1) being fixed on a mounting sleeve (25), the mounting sleeve (25) being sleeved on the top of a movable sleeve (26), and the mounting sleeve (25) being fixed relative to the movable sleeve (26), the movable sleeve (26) being fixed to the top of the movable sleeve (26). The shaft sleeve (26) is sleeved on the second transmission rod (18); the lower end of the installation shaft sleeve (25) is fixedly connected to a transfer mechanism (27), and the lower end of the transfer mechanism (27) is provided with an impact block (28), and the impact block (28) is used to trigger the impact system (29); the transfer mechanism (27) is sleeved on the movable shaft sleeve (26); the installation shaft sleeve (25) is fixedly connected to the energy storage mechanism (30), and the energy storage mechanism (30) is sleeved on the outer side of the transfer mechanism (27); The hanging arm (21-1) is slidably arranged along a second axial groove (31), the second axial groove (31) is axially arranged along the central axis (11), and the second axial groove (31) is opened on the second inner support member (32).

3. A multi-directional impact unblocking method for well logging according to claim 2, Features: The indexing mechanism (27) comprises an upper indexing sleeve (27-1), a lower indexing sleeve (27-2) and a plurality of indexing stop pins (27-3); the upper indexing sleeve (27-1) is fixedly connected to the mounting sleeve (25); a plurality of third axial grooves (27-4) are provided on the upper indexing sleeve (27-1) corresponding to the plurality of indexing stop pins (27-3); the indexing stop pins (27-3) slide in the third axial grooves (27-4); the indexing stop pins (27-3) are fixed to a second fixed block (33); the second fixed block (33) is fixed relative to the housing (2); a spring is provided between the lower end of the lower indexing sleeve (27-2) and the lower end of the movable sleeve (26); A plurality of rotation surfaces (27-5) are arranged around the contact ends of the upper rotation sleeve (27-1) and the lower rotation sleeve (27-2); the rotation surfaces (27-5) are arc surfaces inclined clockwise and upward, and the lower end of the upper rotation sleeve (27-1) is exactly meshed with the lower rotation sleeve (27-2).

4. A multi-directional impact unblocking method for well logging according to claim 3, Features: The energy storage mechanism (30) comprises an energy storage rod (34) fixed on the mounting sleeve (25), the energy storage rod (34) moving axially along the central axis (11), the bottom end of the energy storage rod (34) being a disc-shaped support block (34-1), and an energy storage spring being arranged between the support block (34-1) and the second fixed block (33).

5. A multi-directional impact unblocking method for well logging according to claim 4, Features: The impact system (29) comprises a plurality of impact arms (29-1), the plurality of impact arms (29-1) being arranged in multiple directions around the outer wall of the housing (2), the housing (2) being provided with a receiving groove (29-2) for accommodating the impact arm (29-1); the movable end of the impact arm (29-1) is arranged corresponding to an outlet for the impact block (28) to impact, and the other end of the impact arm (29-1) is hinged to the reset system (36); the impact arm (29-1) comprises two sections hinged to each other, and a roller (29-3) is provided at the hinge of the two sections.

6. A multi-directional impact unblocking method for well logging according to claim 5, Features: The reset system (36) comprises a plurality of reset units (36-1) arranged corresponding to the plurality of impact arms (29-1); the shell of the reset unit (36-1) is fixed to the outer shell (2) by means of a pin; a reset spring (36-2) is arranged in the shell of the reset unit (36-1); the upper end of the reset spring (36-2) is connected to a push rod (36-3); the movable end of the push rod is hinged to the lower end of the impact arm (29-1).

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