A linked torsional vibration release device and method

Abstract

The present invention relates to a linkage torsional vibration jam release device and method. It belongs to the field of drilling engineering in petroleum, coal mine and geological exploration. The linkage torsional vibration jam release device includes: a cylinder, a spiral mandrel and a guide rod; the cylinder includes a sealing joint, an upper cylinder, an inner spiral short section and a lower cylinder connected in sequence from top to bottom, and the spiral mandrel is arranged in the inner spiral short section; the guide rod is located in the upper cylinder and the sealing joint, and the upper end of the guide rod is sleeved with a balanced sealing piston, and the lower end is sleeved with a pressure-bearing component; the balanced sealing piston is in close contact with the inner wall of the sealing joint and can move up and down on the guide rod; a limited retaining spring is arranged on the guide rod at the upper end of the balanced sealing piston 4, and a pre-tightening nut is arranged on the guide rod at the lower end. The jam release device of the present invention is used in conjunction with the original jar to generate a rotational torsional force on the drill tool, thereby improving the ability to handle drill jam accidents.

Description

Technical Field

[0001] This invention relates to a grappling device, specifically a linkage torsional vibration grappling device and method. It belongs to the field of drilling engineering in petroleum, coal mining, and geological exploration. Background Technology

[0002] During drilling operations, drill string jamming accidents often occur due to various reasons such as sediment, mud cake, formation collapse, and falling objects. When mud treatment is ineffective, shock blasting is used to free the drill string. However, shock blasting can only perform axial shock operations and cannot generate torsional force on the drill string. When shock blasting fails to free the drill string, the wellbore and drill string must be backfilled and the drilling work restarted, resulting in serious waste of assets and time.

[0003] There is a patent document with publication number CN214170487U, entitled "A Continuous Downward Impact Unsticking Device for Downhole Drilling". This device unsticks the drill string by providing a continuous downward impact force when it becomes stuck. This device is an improved version of the downward impactor, solving the problem that the original impactor could only provide a single downward impact force and could not provide continuous impact.

[0004] The patent document with publication number CN109458149A, entitled "Pulse Vibration Unlocker", describes a device that uses a pulse vibration frequency generator to produce mechanical pulse vibration waves. These mechanical pulse vibration waves are continuously generated, providing a continuous vibration force to unlock stuck objects.

[0005] Both of the aforementioned patent documents, CN214170487U and CN109458149A, utilize continuous vibration to unlock the device, ensuring that rotation is not possible during the unlocking process, thus providing torque.

[0006] Meanwhile, patent document CN112593884A, entitled "A Continuous Downward Impact Unsticking Device and Method for Wells," describes a device that, while capable of some rotation, is limited. This device is used after stuck drill bits in areas such as keyways, wellbore collapses, or reduced diameters. It requires the drill string not to be completely stuck, to have a certain range of vertical movement, and to be able to rotate freely. Furthermore, the mud channel must be open, utilizing the mud circulation pressure to provide mechanical energy, thereby achieving the best continuous downward impact effect. This device is lowered into the well along with the drill string and remains downhole during drilling operations. It is retrieved along with the drill string during retrieval and is useless when no stuck drill bit incident occurs. In other words, it is an unsticking tool that must be lowered in advance to prevent stuck drill bits.

[0007] None of the above card-unlocking tools can be used in conjunction with the original shocker, and card unlocking is subject to certain limitations. Summary of the Invention

[0008] This invention overcomes the shortcomings of the prior art. One of the objectives of this invention is to provide a linkage torsional vibration unsticker. This unsticker is used in conjunction with the original shock absorber to generate a torsional force on the drill string while shocking, thereby improving the ability to handle stuck drill accidents, especially when the shock absorber is ineffective.

[0009] The second objective of this invention is to provide a linkage torsional vibration unblocking method, which transforms upward or downward impact force into circumferential impact force, is not limited by mud channel blockage, can improve the impact effect, reduce labor intensity and safety risks, and can be used for post-incident handling after a stuck drill accident.

[0010] The third objective of this invention is to provide a method for using a linkage torsional vibration card releaser, which is easy to use and install, and convenient for field application.

[0011] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0012] A linkage torsional vibration release device includes: a cylindrical body, a spiral mandrel, and a guide rod; the cylindrical body includes a sealing joint, an upper cylindrical body, an inner spiral short section, and a lower cylindrical body connected sequentially from top to bottom, with the spiral mandrel disposed inside the inner spiral short section; the guide rod is located inside the upper cylindrical body and the sealing joint, with a balance sealing piston sleeved at the upper end and a pressure-bearing component sleeved at the lower end; the balance sealing piston is in close contact with the inner wall of the sealing joint and can move up and down on the guide rod; a limit snap ring is provided on the guide rod at the upper end of the balance sealing piston, and a preload nut is provided on the guide rod at the lower end.

[0013] Furthermore, the lower end of the guide rod is connected to the spiral spindle via a load-bearing sleeve, which is used for the downward-impact linkage torsional vibration release device.

[0014] Furthermore, a gasket is provided inside the upper cylinder, and the lower end of the guide rod passes through the gasket and connects to the spiral spindle, which is used for the upward linkage torsional vibration release device.

[0015] Furthermore, spiral guide rails are provided on both the outer surface of the spiral mandrel and the inner wall of the inner spiral section, allowing the spiral mandrel to move within the inner spiral section.

[0016] Furthermore, both the guide rod and the spiral mandrel are hollow components and are interconnected, forming a mud channel.

[0017] Furthermore, the pressure-bearing component is a disc spring assembly, which consists of multiple sets of multi-leaf disc springs. The stroke and pressure of the spiral spindle are adjusted according to the number of disc springs and the number of sets.

[0018] Furthermore, the upper end of the lower cylinder is threadedly connected to the inner spiral short section, and the lower end is fitted onto the spiral mandrel, with a sealing structure between the inner wall and the spiral mandrel.

[0019] Furthermore, a sealing structure is provided between the balanced sealing piston, the guide rod, and the sealing joint.

[0020] Oil is filled between the lower end of the balance sealing piston and the lower end of the lower cylinder sealing structure.

[0021] A linkage torsional vibration unlocking method is provided, which uses the linkage torsional vibration unlocking device described in any one of the above-mentioned methods in conjunction with a vibrator. After accumulating energy, the vibrator strikes upward or downward. Under the action of the hammering force, the inner spiral short section of the linkage torsional vibration unlocking device moves downward, causing the spiral mandrel to generate axial torque, which is transmitted to the jamming point to complete one vibration. Then, it is reset and vibrated again. The above steps are repeated to complete the unlocking.

[0022] Advantages of this invention:

[0023] The linkage torsional vibration release device of the present invention is connected to the shock absorber. Through their mutual cooperation, a torsional force can be provided to the drill bit when the drill is stuck, which increases the possibility of release, reduces labor intensity and safety risks, and improves the ability to handle accidents. The linkage torsional vibration release device is easy to install and convenient for field application.

[0024] This invention, by setting a helical mandrel inside the inner helical short section, allows the inner helical short section to move downward under the hammering force of the vibrator, thereby generating axial torque on the helical mandrel and increasing the possibility of unblocking.

[0025] In this invention, the inner helical short section and the helical mandrel are respectively provided with helical guide rails, and the helical guide rails fit together to achieve the transmission of hammering force.

[0026] This invention achieves adjustment of the stroke and pressure of the spiral mandrel by adjusting the number of disc springs and the number of groups of disc springs in the pressure-bearing component (disc spring group) on the guide rod.

[0027] This invention uses a preload nut and a load-bearing sleeve to limit the upper and lower positions of the pressure-bearing assembly (disc spring assembly).

[0028] This invention achieves pressure balance by filling the sealing structure from the lower end of the balance sealing piston to the lower end of the lower cylinder with oil.

[0029] This invention features a step within the upper cylinder of the upper-impact linkage torsional vibration release device, facilitating the installation of a washer ring. Because the step within the upper cylinder is too small, it creates an angle on the disc springs of the pressure-bearing component (disc spring assembly). When the disc springs are pressed obliquely, the step is easily damaged. Furthermore, the hardness inside the upper cylinder is difficult to adjust. By installing a washer ring, the load-bearing area is increased, the adjustment difficulty is reduced, and the cost is lowered. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the downward-impact linkage torsional vibration de-tapping device of the present invention;

[0031] Figure 2 This is a schematic diagram of the spiral guide rail of the present invention;

[0032] Figure 3 This is a connection diagram of the impact-linked torsional vibration card releaser of the present invention during use;

[0033] Figure 4 This is a schematic diagram of the structure of the upward-impact linkage torsional vibration release device of the present invention;

[0034] In the diagram, 1. Inner spiral short section; 2. Spiral mandrel; 3. Guide rod; 4. Balance sealing piston; 5. Limiting snap ring; 6. Lower cylinder; 7. Bearing sleeve; 8. Pressure bearing assembly; 9. Upper cylinder; 10. Sealing joint; 11. Preload nut; 12. Derrick; 13. Downward impact vibrator; 14. Rotary table; 15. Drill tool; 16. Downward impact linkage torsional vibration release device; 17. Fish head; 18. Jamming point; 19. Washer ring; 20. Step. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, but this is not intended to limit the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Explanation of technical terminology related to shock devices: Shock devices are divided into upward-impact shock devices and downward-impact shock devices. Downward-impact shock devices are used when applying downward hammer force; upward-impact shock devices are used when applying upward hammer force. This is existing technology.

[0037] When a stuck drill string is pulled up due to a complex situation, a shock absorber is typically used to apply a large, instantaneous impact force to the drill string, causing it to move downwards or upwards and thus freeing it from the stuck position. Existing shock absorbers can only impact downwards or upwards, with a fixed direction. However, in many downhole situations, only a small amount of circumferential impact torque is needed to free the drill string, but current technology and equipment cannot provide this circumferential impact torque. Therefore, this invention provides a linked torsional shock absorber that, when used in conjunction with a shock absorber, converts part of the shock force into circumferential torque through a large helical structure, increasing the success rate of freeing the drill string.

[0038] Example 1

[0039] like Figure 1As shown, a linkage torsional vibration release device includes: a cylindrical body, a spiral mandrel 2, and a guide rod 3; the cylindrical body includes a sealing joint 10, an upper cylindrical body 9, an inner spiral short section 1, and a lower cylindrical body 6 connected sequentially from top to bottom, with the spiral mandrel 2 disposed inside the inner spiral short section 1; the guide rod 3 is located inside the upper cylindrical body 9 and the sealing joint 10, with a balance sealing piston 4 sleeved at the upper end and a pressure-bearing component 8 sleeved at the lower end; the balance sealing piston 4 is in close contact with the inner wall of the sealing joint 10 and can move up and down on the guide rod 3; a limit snap ring 5 is provided on the guide rod 3 at the upper end of the balance sealing piston 4, and a preload nut 11 is provided on the guide rod 3 at the lower end.

[0040] This invention discloses a linkage torsional vibration unlocking method, which uses the aforementioned linkage torsional vibration unlocker in conjunction with a vibrator. After accumulating energy, the vibrator strikes upward or downward. Under the action of the hammering force, the inner spiral section of the linkage torsional vibration unlocker moves downward, causing the spiral spindle to generate axial torque, which is transmitted to the jamming point to complete one vibration. Then, it is reset and vibrated again. The above steps are repeated to complete the unlocking.

[0041] Example 2

[0042] like Figure 1 As shown, based on Embodiment 1, the spiral mandrel 2 is further provided with spiral guide rails on both the outer side and the inner wall of the inner spiral section 1, so that the spiral mandrel 2 can move within the inner spiral section 1.

[0043] Furthermore, both the guide rod 3 and the spiral mandrel 2 are hollow components and are interconnected, forming a mud channel.

[0044] Furthermore, the pressure-bearing component 8 is a disc spring assembly, which consists of multiple sets of multi-leaf disc springs. The stroke and pressure of the spiral spindle are adjusted according to the number of disc springs and the number of sets.

[0045] Furthermore, the upper end of the lower cylinder 6 is threadedly connected to the inner spiral short section 1, and the lower end is sleeved on the spiral mandrel 2, with a sealing structure between the inner wall and the spiral mandrel 2.

[0046] Furthermore, a sealing structure is provided between the balance sealing piston 4, the guide rod 3, and the sealing joint 10.

[0047] Furthermore, oil is filled between the lower end of the balance sealing piston 4 and the lower end of the lower cylinder 6 sealing structure.

[0048] Furthermore, such as Figure 2 As shown, the cross-section of the helical teeth of the helical guide rail is a trapezoid with a chamfered arc surface.

[0049] Furthermore, the included angle between the two hypotenuses of the trapezoid is 30-60 degrees, the chamfer radius R is 11-12 mm, the center distance L between two adjacent spiral teeth is 70-80 mm, and the spiral tooth height h is 30-50 mm. These dimensional constraints ensure the load-bearing capacity of the spiral guide rail when transmitting torque.

[0050] Preferably, the included angle between the two hypotenuses of the trapezoid is 30 degrees, the chamfer radius is 10 mm, the center distance between two adjacent spiral teeth is 75 mm, and the spiral tooth height is 40 mm.

[0051] Example 3

[0052] like Figure 1 As shown, based on Embodiment 1 or 2, the present invention provides a downward-impact linkage torsional vibration release device, comprising: a cylinder, a spiral mandrel 2, a guide rod 3, and a load-bearing sleeve 7; the cylinder comprises a sealing joint 10, an upper cylinder 9, an inner spiral short section 1, and a lower cylinder 6.

[0053] The upper cylinder 9 and the lower cylinder 6 are respectively connected to the upper and lower ends of the inner spiral short section 1. A spiral mandrel 2 is provided inside the inner spiral short section 1, and a sealing joint 10 is connected to the upper end of the upper cylinder 9.

[0054] The guide rod 3 is located inside the upper cylinder 9 and the sealing joint 10. The lower end of the guide rod 3 is connected to the spiral spindle 2 through the bearing sleeve 7, and the upper end is provided with a limit snap ring 5.

[0055] The balance sealing piston 4 is sleeved on the outer wall of the guide rod 3 and in close contact with the inner wall of the sealing joint 10, and can move up and down on the guide rod 3; the balance sealing piston is limited up and down by the limiting snap ring and the boss on the guide rod.

[0056] A pressure-bearing component 8 is fitted on the guide rod 3 between the balance sealing piston 4 and the load-bearing sleeve 7.

[0057] Preferably, the upper and lower ends of the inner spiral short section 1 are connected to the upper cylinder 9 and the lower cylinder 6 respectively by threads; the upper end of the upper cylinder 9 is connected to the sealing joint 10 by threads, and the upper part of the sealing joint 10 is provided with drill rod threads. The connection method here is not limited to threads; it can also be other detachable fixed connection methods.

[0058] Furthermore, such as Figure 1 and Figure 3 As shown, the inner wall of the inner spiral section 1 is provided with a spiral guide rail. The upper part of the spiral mandrel 2 is connected to the load-bearing sleeve 7, the lower part is connected to the fish head 17, and the middle part is provided with a spiral guide rail, which fits with the spiral guide rail of the inner spiral section 1 and can move within the inner spiral section 1.

[0059] Furthermore, the spiral guide rail (referred to as the large spiral) of the downward linkage torsional vibration release device of the present invention is left-handed and reverse-handed. The upper part of the load-bearing sleeve 7 limits the disc spring assembly, and the load-bearing sleeve 7 can move up and down inside the upper cylinder 9, and is connected to the lower end of the guide rod 3 in the middle.

[0060] Preferably, the upper part of the spiral mandrel 2 is connected to the load-bearing sleeve 7 by a thread, and the lower part is connected to the fish head 17 by a thread. Other detachable fixed connection methods are also possible.

[0061] Furthermore, the guide rod 3, the spiral mandrel 2, and the load-bearing sleeve 7 are all hollow parts and are connected to each other, forming a mud channel together. The lower end of the guide rod 3 is connected to the load-bearing sleeve 7 by a thread, and the upper end is fixedly connected to the limiting snap ring 5. A pre-tightening nut 11 is threadedly connected to the guide rod 3 located at the lower end of the balance sealing piston 4, and the pressure-bearing assembly 8 is located between the pre-tightening nut 11 and the load-bearing sleeve 7.

[0062] Furthermore, both the upper cylinder 9 and the lower cylinder 6 are provided with through holes for oil injection or venting (not shown in the figure). Oil injection or venting is performed through the through holes on the upper cylinder 9 and the lower cylinder 6. When one end is used as an oil injection hole, the other end is used as an venting hole. Oil is filled between the lower part of the balance sealing piston 4 and the sealing structure at the lower end of the lower cylinder 6. The sealing ring on the lower cylinder and the sealing ring on the balance sealing piston seal the hydraulic oil inside, which plays a role in lubrication and pressure transmission. There is an oil injection hole on the lower cylinder. When the disc spring assembly is compressed, the hydraulic oil in the disc spring assembly is squeezed out, pushing the balance piston to move upward, realizing the pressure balance between oil and mud, and eliminating the influence of the liquid column pressure on the entire downward linkage torsional vibration release device.

[0063] Furthermore, the disc spring assembly is sleeved on the guide rod, with its upper end limited under the preload nut 11 and its lower end limited on the bearing sleeve 7. The pressure-bearing component (disc spring assembly) provides a certain preload force, which ensures that: after the drill string above the stuck point is reversed, and the impact vibrator and the impact-linked torsional vibration release device are connected and lowered into the wellbore, the inner helical short section and the helical mandrel cannot rotate freely during the top-locking operation. At this time, the impact-linked torsional vibration release device is a rigid whole, thus enabling tight locking during the locking operation.

[0064] like Figure 3 As shown, the present invention also provides a method for using a downward-clicking torsional vibration card releaser, comprising the following steps:

[0065] S1. Installation of the down-impact linkage torsional vibration release device: When a stuck drill accident occurs during the construction of an oil and gas well and it is necessary to release the stuck drill bit by vibration, circulate the drilling fluid fully to carry the cuttings out of the wellhead as much as possible. After stopping the pump, uncouple the drill string 15 at the upper end of the stuck point 18, pull out the upper drill string 15, connect the down-impact linkage torsional vibration release device 16 to the lower end of the drill string 15, and connect the down-impact shock device 13 to the drill string 15.

[0066] S2. Operation of the Down-Strike Linkage Torsional Vibration Unlocker: The down-strike linkage torque vibration unlocker 16 is lowered into the well, and the lower end thread of the spiral mandrel 2 is connected to the fish head 17; the down-strike shocker 13 is pressed down, and after accumulating energy, the down-strike shocker 13 strikes downward. Under the action of the hammering force, the inner spiral short section 1 of the down-strike linkage torque vibration unlocker 16 moves downward, so that the spiral mandrel 2 generates axial torque, and transmits the torque to the stuck point 18, completing one shock.

[0067] S3. Downward-impact linkage torsional vibration release device reset: After one vibration operation is completed, the drill string 15 is lifted up, and the cylinder consisting of the sealing joint 10, the upper cylinder 9, the inner spiral short section 1 and the lower cylinder 6 is lifted to its original position, ready for the next vibration.

[0068] Example 4

[0069] Based on Example 3, the sealing structure of the present invention preferably uses a sealing ring.

[0070] This invention provides a downward-impact linkage torsional vibration card releaser, the installation process of which is as follows:

[0071] 1) Install two sealing rings on the lower cylinder 6, put the lower cylinder 6 on the spiral mandrel 2, then put the inner spiral short section 1 on the spiral mandrel 2 through the spiral guide rail, and tighten the inner spiral short section 1 and the lower cylinder 6.

[0072] 2) Install the load-bearing sleeve 7 onto the spiral mandrel 2 and tighten it; then install the guide rod 3 onto the load-bearing sleeve 7 and tighten it.

[0073] 3) Place the disc spring assembly onto the guide rod 3 in sequence and press it tight, then put the preload nut 11 onto the guide rod 3 and tighten it;

[0074] 4) Slide the upper cylinder 9 onto the guide rod 3 from the end of the pre-tightening nut 11, and tighten the inner helical short section 1 and the upper cylinder 9;

[0075] 5) Install the inner and outer sealing rings on the balance sealing piston 4. If necessary, install a dustproof ring on the balance sealing piston 4, and then put the balance sealing piston 4 on the guide rod 3.

[0076] 6) Install the limiting snap ring 5 on the upper end of the guide rod 3;

[0077] 7) Install the sealing joint 10 onto the upper cylinder 9 and tighten it.

[0078] 8) Loosen the oil filling hole and the vent hole, and use an oil filling machine to fill the inner cavity with anti-wear hydraulic oil until the inner cavity is completely filled with anti-wear hydraulic oil.

[0079] like Figure 3As shown, the impact-linked torsional vibration release device 16 of the present invention is installed below the impact vibrator 13 and used in conjunction with the impact vibrator. Specifically, the upper end of the impact vibrator 13 is set below the derrick 12 via a turntable 14, and the lower end of the impact vibrator 13 is connected to the sealing joint 10 on the impact-linked torsional vibration release device via a drill string 15. The spiral mandrel 2 of the impact-linked torsional vibration release device is connected to the fish head 17.

[0080] The working process of the impact-linked torsional vibration card releaser of this invention is as follows:

[0081] 1) When the impact-linked torsional vibration release device is in its free state, the upper cylinder is fixed, and the disc spring assembly pushes the load-bearing sleeve downwards, causing the spiral mandrel and guide rod to rotate downwards. When the preload nut presses on the disc spring assembly, the spiral mandrel is fully extended, and due to the downward force of the disc spring assembly on the spiral mandrel, the spiral mandrel cannot rotate. When the impact-linked torsional vibration release device is installed on the drill string and drilled to the bottom for reconnection, the spiral mandrel and the inner spiral short section do not rotate relative to each other, allowing for reconnection.

[0082] 2) When the energy storage value set by the down-impact shredder is less than the maximum design value of the down-impact linkage torsional vibration release device, after the down-impact linkage torsional vibration release device and the down-impact shredder are engaged above the drill string jamming point, the rotary table locks the upper drill string, preventing the cylinder composed of the sealing joint, upper cylinder, inner spiral short section, and lower cylinder from rotating. At this time, the drill string is pressed down, and the down-impact shredder stores energy. When the stored energy reaches the set tonnage, the down-impact shredder strikes down. When the down-impact force exceeds the disc spring preload, the upper cylinder, inner spiral short section, and lower cylinder move downward, causing the spiral mandrel to rotate, the pressure sleeve to move upward, and the spiral mandrel to contract. When the spiral mandrel contracts, it generates a circumferential torque that acts on the jamming point to release the jamming. At this time, the jamming point is subjected to circumferential torque. If the jamming is not released by one strike, the spiral mandrel 2 remains stationary. The drill string can be lifted, the cylinder can be lifted to its original position, and the strike can be repeated.

[0083] 3) When the energy storage value set by the impact shock absorber is greater than the maximum design value of the impact-linked torsional vibration release device, the spiral spindle retracts completely. At this time, the disc spring is compressed to its minimum position and can no longer be compressed. The impact torsional vibration release device becomes a rigid structure and directly transmits the impact force downward. At this time, the jamming point is simultaneously subjected to circumferential torque and axial impact force, thereby achieving release.

[0084] Example 5

[0085] Based on Example 2, this invention provides an upward-impact linkage torsional vibration release method, which utilizes an upward-impact linkage torsional vibration release device in conjunction with an upward-impact vibrator to achieve release. When the upward-impact linkage torsional vibration release device is not under force, its spiral mandrel 2 is in a retracted state. During vibration, the drill bit is pulled upward, and the upward-impact vibrator stores energy. When the stored energy reaches a set tonnage, the upward-impact vibrator strikes upward. When the upward-impact force exceeds the pre-tightening force of the pressure-bearing component 8 of the upward-impact linkage torsional vibration release device, the cylinder of the device moves upward, causing the spiral mandrel 2 to rotate. The spiral mandrel 2 extends from the lower end of the cylinder, generating a circumferential torsional force that acts on the stuck point to release the stuck object.

[0086] Furthermore, such as Figure 4 As shown, this invention provides an upward-impact linkage torsional vibration release device, comprising: a cylindrical body, a spiral mandrel 2, a guide rod 3, and a washer 19. The cylindrical body includes a sealing joint 10, an upper cylindrical body 9, an inner spiral section 1, and a lower cylindrical body 6 connected sequentially from top to bottom. The spiral mandrel 2 is disposed within the inner spiral section 1. The washer 19 is disposed within the upper cylindrical body 9. The guide rod 3 is located within the upper cylindrical body 9 and the sealing joint 10, with one end passing through the washer 19 and connected to the spiral mandrel 2, and the other end fitted with a balance sealing piston 4, and a limit snap ring 5 is provided at the end. The balance sealing piston 4 is in close contact with the inner wall of the sealing joint 10 and can move up and down on the guide rod 3. A pre-tightening nut 11 is provided on the guide rod 3 at the lower end of the balance sealing piston 4, and a pressure-bearing assembly 8 is fitted on the guide rod 3 between the pre-tightening nut 11 and the washer 19. The balance sealing piston 4 is limited up and down by the limit snap ring and the boss on the guide rod.

[0087] Preferably, the upper and lower ends of the inner spiral short section 1 are connected to the upper cylinder 9 and the lower cylinder 6 respectively by threads; the upper end of the upper cylinder 9 is connected to the sealing joint 10 by threads. The connection method here is not limited to threads, but can also be other detachable fixed connection methods.

[0088] Preferably, the lower end of the guide rod 3 is connected to the spiral mandrel 2 by a thread, and the upper end is fixedly connected to the limiting snap ring 5; the lower end of the spiral mandrel 2 is connected to a fish head by a thread, but this is not limited to a threaded connection, and can also be other detachable fixed connection methods.

[0089] Furthermore, both the upper cylinder 9 and the lower cylinder 6 are provided with through holes (not shown) for oil injection or venting. Oil injection or venting is performed through the through holes on the upper and lower cylinders 6; when one end is used as an oil injection hole, the other end becomes a venting hole. Oil is filled between the lower part of the balance sealing piston 4 and the lower end of the lower cylinder 6. The sealing rings on the lower cylinder and the balance piston seal the hydraulic oil inside, providing lubrication and pressure transmission. The lower cylinder has an oil injection hole. When the disc spring assembly is compressed, the hydraulic oil inside is squeezed out, pushing the balance piston upwards, achieving pressure balance between the oil and the mud, and eliminating the influence of the liquid column pressure on the entire upper-impact linkage torsional vibration release device.

[0090] Furthermore, such as Figure 2 As shown, the spiral guide rail (referred to as the large spiral) is right-handed and rotates clockwise;

[0091] Furthermore, a step 20 is provided inside the upper cylinder 9, and a gasket 19 is provided on the step 20 along the circumference of the upper cylinder. By providing the gasket, the load-bearing area is increased, the adjustment difficulty is reduced, the cost is reduced, the step is not easily damaged, and support is provided for the pressure-bearing component 8.

[0092] Furthermore, the pressure-bearing component 8 is a disc spring assembly, which consists of multiple sets of multi-leaf disc springs. The stroke and pressure of the spiral mandrel 2 are adjusted according to the number of disc springs and the number of sets. The upper end of the pressure-bearing component is limited by the pre-tightening nut 11, and the lower end is limited by the washer 19. Preferably, each disc spring assembly consists of 1-4 disc springs, and the release pre-tightening force can generally be achieved within this range.

[0093] The present invention discloses an upward-impact-linked torsional vibration unlocking method, the specific process of which is as follows:

[0094] 1) When the upper-impact linkage torsional vibration release device is in a free state, the spiral mandrel 2 is in a retracted state, the pressure-bearing component 8 is compressed, and under the restriction of the washer ring 19, there is an upward preload force on the preload nut 11, so that the spiral mandrel 2 does not rotate. When the upper-impact linkage torsional vibration release device is installed on the drill bit and drilled to the bottom for reconnection, the spiral mandrel 2 and the inner spiral short section 1 do not rotate relative to each other, thus realizing the reconnection operation.

[0095] 2) When the energy storage value set by the upper impact vibrator is less than the maximum design value of the upper impact linkage torsional vibration release device, after the upper impact linkage torsional vibration release device and the upper impact vibrator are engaged above the drill string jamming point, the upper drill string is locked by the rotary table, so that the cylinder composed of the sealing joint, upper cylinder, inner spiral short section and lower cylinder cannot rotate. During the vibration, the drill string is pulled up, and the upper impact vibrator stores energy. When the stored energy reaches the set tonnage, the upper impact vibrator strikes upward. When the upward force exceeds the pre-tightening force of the pressure-bearing component, the cylinder moves upward, causing the spiral mandrel to rotate. The spiral mandrel 2 extends from the lower end of the cylinder. When the spiral mandrel 2 extends, it generates a circumferential torque that acts on the jamming point to release the jamming. At this time, the jamming point is subjected to circumferential torque. If the jamming is not released by one vibration, the spiral mandrel 2 does not move and presses down on the drill string, pressing the cylinder back to its original position, and the vibration is repeated.

[0096] 3) When the energy storage value set by the upper impact shock device is greater than the maximum design value of the upper impact linkage torsional vibration release device, the spiral mandrel is fully extended. At this time, the pressure-bearing component is compressed to the minimum position and can no longer be compressed. When the upper torsional vibration release device becomes a rigid structure, it directly transmits the upper impact force upward. At this time, the jamming point is simultaneously subjected to circumferential torque and axial upper impact force, thereby realizing the release.

[0097] Furthermore, when the upper impact shock release device is struck, the pressure-bearing component is compressed, and the force point is at the position of the washer ring, which acts on the step of the upper cylinder.

[0098] In the embodiments of the present invention, the sealing structure is preferably a sealing ring. The turntable in the embodiments is well known to those skilled in the art and will not be described in detail here.

[0099] Example 6

[0100] Unlike Embodiment 5, the present invention also provides an installation process for an upper-click linkage torsional vibration card releaser as follows:

[0101] 1) Install two sealing rings on the lower cylinder 6, put the lower cylinder 6 on the spiral mandrel 2, then put the inner spiral short section 1 on the spiral mandrel 2 through the spiral guide rail, and tighten the inner spiral short section 1 and the lower cylinder 6.

[0102] 2) Install the guide rod 3 onto the spiral mandrel 2 and tighten it; put the upper cylinder 9 onto the spiral mandrel 2 and tighten the inner spiral short section 1 and the upper cylinder 9;

[0103] 3) Place the washer on the guide rod 3, then place the disc spring assembly on the guide rod 3 in sequence and press it tight. Finally, put the preload nut 11 on the guide rod 3 and tighten it.

[0104] 4) Install the inner and outer sealing rings on the balance sealing piston 4. If necessary, install a dustproof ring on the balance sealing piston 4, and then put the balance sealing piston 4 on the guide rod 3.

[0105] 5) Install the limiting snap ring 5 on the upper end of the guide rod 3;

[0106] 6) Install the sealing joint 10 onto the upper cylinder 9 and tighten it.

[0107] 7) Loosen the oil filling hole and the vent hole, and use an oil filling machine to fill the inner cavity with anti-wear hydraulic oil until the inner cavity is completely filled with anti-wear hydraulic oil.

[0108] The present invention also provides a method for using an upward-clicking torsional vibration card releaser, comprising the following steps:

[0109] S1. Installation of the upper-impact linkage torsional vibration release device: When a stuck drill accident occurs during the construction of an oil and gas well and needs to be released by vibration, circulate the drilling fluid fully to carry the cuttings out of the wellhead as much as possible. After stopping the pump, uncouple the drill string at the upper end of the stuck point, pull out the upper drill string, connect the upper-impact linkage torsional vibration release device to the lower end of the drill string, and connect the upper-impact vibrator to the drill string.

[0110] S2. Operation of the Upward-Strike Linked Torsional Vibration Unlocker: Lower the upward-strike linked torsional vibration unlocker into the well and connect the lower thread of the spiral mandrel 2 to the fish head; lift the upward-strike vibrator, and after accumulating energy, the upward-strike vibrator strikes upward. Under the action of the hammering force, the inner spiral short section 1 of the upward-strike linked torsional vibration unlocker moves upward, causing the spiral mandrel 2 to generate axial torque, which is transmitted to the stuck point, completing one vibration.

[0111] S3. Reset of the upper-impact linkage torsional vibration release device: After one vibration operation is completed, press down the drill bit to press the cylinder back to its original position, ready for the next vibration.

[0112] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail can be made without departing from the spirit and scope of the present invention. Components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and will not be described in detail here.

Claims

1. A linked torsional vibration release device, characterized by comprising: Cylinder, spiral mandrel and guide rod; the cylinder comprises a sealing joint, an upper cylinder, an inner spiral short section and a lower cylinder connected in sequence from top to bottom, and the spiral mandrel is arranged in the inner spiral short section; the guide rod is located in the upper cylinder and the sealing joint, the upper end of the guide rod is sleeved with a balanced sealing piston, and the lower end is sleeved with a pressure-bearing component; the balanced sealing piston is in close contact with the inner wall of the sealing joint and can move up and down on the guide rod; a limited retaining spring is arranged on the guide rod at the upper end of the balanced sealing piston, and a pre-tightening nut is arranged on the guide rod at the lower end; The lower end of the guide rod is connected to the spiral mandrel through a bearing sleeve, and is used as a downward-strike linkage torsional vibration release device for downward-strike linkage torsional vibration release; or a gasket is provided in the upper cylinder, and the lower end of the guide rod is connected to the spiral mandrel through the gasket, and is used as an upward-strike linkage torsional vibration release device for upward-strike linkage torsional vibration release; The linkage torsion vibration release device is used in conjunction with a jar, which is divided into an upper jar and a lower jar. When the lower hammer force is applied downward, the lower jar is used; when the upper hammer force is applied upward, the upper jar is used. The described method of the downward-strike linkage torsional vibration release device is as follows: S1. Installation of down-strike linkage torsional vibration release device: When a stuck drill bit accident occurs during the construction of an oil and gas well and needs to be released by jarring, the drilling fluid is fully circulated to carry the cuttings in the wellbore out of the wellhead as much as possible. After stopping the pump, the drill bit is unhooked at the upper end of the stuck point, the upper drill bit is pulled out, and the down-strike linkage torsional vibration release device is connected to the lower end of the drill bit, and the down-strike jar is connected to the drill bit; S2, the down-strike linkage torsion vibration release device works: the down-strike linkage torsion vibration release device is lowered into the well, and the thread at the lower end of the spiral mandrel is buckled with the fish head; the down-strike jar is pressed down, and the down-strike jar accumulates energy and then hammers downward. Under the action of the hammering force, the inner spiral short section of the down-strike linkage torsion vibration release device moves downward, so that the spiral mandrel generates axial torque, and the torque is transmitted to the stuck point, completing one jarring; The method of the upper-strike linkage torsion-vibration release device utilizes the upper-strike linkage torsion-vibration release device and the upper-strike jar to cooperate in unblocking; when the upper-strike linkage torsion-vibration release device is in a free state, the spiral mandrel is in a retracted state, the pressure-bearing component is compressed, and under the restriction of the gasket, an upward pre-tightening force is applied to the pre-tightening nut, so that the spiral mandrel does not rotate; when the upper-strike linkage torsion-vibration release device is installed on the drilling tool and drilled to the bottom for buckling, the spiral mandrel and the inner spiral short section do not rotate relative to each other, so the buckling operation is realized; when jarring, the drilling tool is pulled up, and the upper-strike jar stores energy. When the stored energy reaches a set tonnage, the upper-strike jar strikes up. When the upper-strike force exceeds the pre-tightening force of the pressure-bearing component of the upper-strike linkage torsion-vibration release device, the cylinder of the upper-strike linkage torsion-vibration release device moves upward, so that the spiral mandrel rotates, and the spiral mandrel extends from the lower end of the cylinder. When the spiral mandrel extends, a rotating circumferential torsion is generated to act on the jamming point for unblocking.

2. The linked torsional vibration release device according to claim 1 is characterized in that: The outer part of the spiral mandrel and the inner wall of the inner spiral short section are both provided with spiral guide rails correspondingly, so that the spiral mandrel can move in the inner spiral short section.

3. The linked torsional vibration release device according to claim 1 is characterized in that: The guide rod and the spiral core shaft are both hollow parts and are interconnected to form a mud channel.

4. The linked torsional vibration release device according to claim 1 is characterized in that: The pressure-bearing component is a disc spring group, which is composed of multiple groups of disc springs. The stroke and pressure of the spiral core shaft are adjusted according to the number of disc springs and the number of groups.

5. The linked torsional vibration release device according to claim 1 is characterized in that: The upper end of the lower cylinder is connected with the inner spiral short section thread, and the lower end is sleeved on the spiral core shaft, and a sealing structure is arranged between the inner wall and the spiral core shaft.

6. The linked torsional vibration release device according to claim 5 is characterized by: A sealing structure is arranged between the balance sealing piston, the guide rod and the sealing joint.

7. The linked torsional vibration release device according to claim 6 is characterized in that: Oil is filled between the sealing structure from the lower end of the balance seal piston to the lower end of the lower cylinder.

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