CN217950306U - Vibration type cement sheath cracker and abandonment oil well processing system - Google Patents

Abstract

The utility model discloses a vibration type cement sheath cracker and abandonment oil well processing system, include: the outer pipe is connected with the drill rod, the outer diameter of the outer pipe is smaller than the inner diameter of the waste oil well, and the difference between the outer pipe and the inner wall of the waste oil well is less than or equal to 5mm; a plurality of eccentric vibration mechanisms are arranged in the outer pipe, the vibration frequency of the eccentric vibration mechanisms is larger than or equal to 8500Hz, and the vibration amplitude is smaller than or equal to 8mm. The vibrating type cement sheath breaker provided by the utility model acts on the inner oil pipe of the waste oil well through the vibration of high vibration frequency, and then indirectly acts on the cement sheath outside the inner oil pipe, so that the cutting knife can smoothly pass through the cement-free area or the clearance between the cement fragments; moreover, the utility model provides a vibration type cement sheath cracker can not lead to the integrality to be destroyed because of being hit by jumbo size structure and hit when oil pipe transmission vibration including low vibration frequency guarantees, and then guarantees to promote the abandonment pipeline section completely outside the oil well smoothly at oil pipe promotion in-process.

Description

Vibration type cement sheath cracker and abandonment oil well processing system

Technical Field

The utility model relates to a abandonment oil well processing system technical field especially relates to a vibration type cement sheath cracker and abandonment oil well processing system.

Background

When oil exploitation is carried out, a plurality of layers of sleeves which are sequentially arranged from inside to outside are sometimes needed, the plurality of layers of sleeves are reinforced by pouring cement (a ring is formed after the cement is solidified, and the cement ring is called as a cement ring), and when the oil exploitation system is used, the firmer the cement ring is, the higher the safety performance of the oil exploitation system is; however, when cutting is performed after the oil well is abandoned, the solid cement sheath causes difficulty in cutting and lifting, the driving force required by cutting is doubled due to the solid cement sheath on one hand, and the length of the casing which can be lifted by the lifting driving system after cutting is reduced due to the heavy cement sheath on the other hand.

Utility model patent application No. 922240485 discloses a shallow sea is multilayer sleeve pipe cutting bullet for oil well, as shown in fig. 1, it includes: the explosive-proof explosive shell comprises a lifting ring 1, a sealing cover 2, a sealing plug 3, a booster 4, a top cover 5, a detonator 6, a booster 7, a shaped charge cover 8, a cutting explosive 9, an explosion-proof plate 10, a shearing explosive 11, a shell case 12, a bottom cover 13, a bottom cover center hole 14 and a sealing cap 15.

Paragraph 4 of the utility model patent specification describes about its concept such a section: the inner layer and the outer layer of the sleeve can be cut only by simultaneously cutting the outer cutting bullet and the inner cutting bullet, and the middle layer is still cut continuously due to the protection of the inner layer and the outer layer of cement. Therefore, a metal shaped charge cover is added in the energy gathering groove of the inner cutting bullet and the outer cutting bullet to improve the cutting depth, and then a layer of explosion isolation plate and a section of shearing charge are added at the tail part of the cutting charge of the inner cutting bullet to achieve the effect of transverse shearing. In order to avoid traces above the mud line on the seabed, a digging bomb is adopted, a pit with the depth of 1-1.5 m is dug around the outer casing pipe, and the cutting below the mud line is facilitated.

Because of the utility model discloses an adopt the blasting cutting method, the dose control degree of difficulty is big, has certain danger, and need dig the hole around the outer sleeve pipe, can only be applicable to shallow sea abandonment pipeline cutting, so now no longer use this kind of technique, and change into mechanical cutting device.

For example, patent application No. 2017108019743 discloses an underwater mud cutting device and method for marine abandoned oil platform pipe removal, as shown in fig. 2, wherein the device comprises: the steel pipe cutting device comprises a protective cover 2, a cutting and feeding mechanism, a gold steel chain cutting mechanism, a locking mechanism and a mounting frame 11, wherein the protective cover 2 is arranged outside a steel pipe 1 to be cut, and a heave guide rail 21 is arranged on the inner side of the protective cover 2; the locking mechanism is provided with a positioning hole 20; the cutting and feeding mechanism and the gold steel chain cutting mechanism are arranged on the mounting frame, a positioning pin 17 is arranged below the mounting frame 11, and the positioning pin 17 is inserted into a positioning hole 20 in the locking mechanism to realize relative positioning with the locking mechanism; the locking mechanism and the mounting frame 11 slide up and down along the protective cover 2 through a lifting guide rail 21. The protective cover 2 is connected by two semicircular steel pipe bolts or buckles, and the diameter of the protective cover 2 is determined according to the diameter of the steel pipe to be cut.

The cutting device disclosed in the patent application sinks to a specified depth along a pipe to be cut, is locked by an oil cylinder, and cuts the steel pipe by a gold steel chain; has the advantages that: the protective cover ensures that the cutting process is not influenced by water flow and back silting. However, as mentioned above, due to the characteristics of the solid and heavy cement sheath, the cutting difficulty of the multi-layer casing is large, the length of the pipeline to be cut and lifted each time is limited, and the same cutting and lifting actions are repeated for many times, which is very time-consuming and costly.

It can be seen that there is a need for improvement and development in the art.

SUMMERY OF THE UTILITY MODEL

In view of above-mentioned prior art not enough, the utility model aims at providing a vibration type cement sheath cracker and abandonment oil well processing system aims at solving the abandonment oil well and leads to the cutting degree of difficulty of multilayer sheathed tube great because of the firm and heavy characteristic of cement sheath, and the pipeline length of cutting and mentioning at every turn is limited, leads to needing to repeat same cutting lift action many times, very consumes the problem of time and cost.

The utility model discloses technical scheme as follows:

a vibratory-type cement sheath breaker, comprising: the outer pipe is connected with the drill rod, the outer diameter of the outer pipe is smaller than the inner diameter of the waste oil well, and the difference between the outer pipe and the inner wall of the waste oil well is less than or equal to 5mm; a plurality of eccentric vibration mechanisms are arranged in the outer pipe, the vibration frequency of the eccentric vibration mechanisms is larger than or equal to 8500Hz, and the vibration amplitude is smaller than or equal to 8mm.

The effect of above-mentioned scheme lies in: the utility model provides a vibration type cement sheath knapper acts on the interior oil pipe of abandonment oil well through the vibration of high vibration frequency, and then indirectly acts on the cement sheath in the interior oil pipe outside, destroys the cement sheath, and another part still piles up in the interior oil pipe outside with the form of cement fragment under making some broken cement drop, and then in making subsequent oil pipe cutting, the cutting knife can smoothly pass through the region that does not have cement or the clearance between the cement fragment (specifically depending on the cutting position); moreover, the utility model provides a vibration type cement sheath cracker can not be because of being hit by jumbo size structure and hit and lead to the integrality to be destroyed when oil pipe transmission vibration including low vibration frequency guarantees, and then guarantees to promote the abandonment pipeline section completely outside the oil well smoothly at oil pipe promotion in-process.

In a further preferred aspect, the eccentric vibration mechanism includes: rotate motor and eccentric pendulum, eccentric pendulum fixed connection in rotate the output shaft of motor, it is provided with two support columns to rotate the motor towards eccentric pendulum one end terminal surface, support column outer fringe cover is equipped with flexible buffer sleeve, the outer tube inboard be provided with the support groove of support column looks adaptation, flexible buffer sleeve with support groove interference fit.

The effect of above-mentioned scheme lies in: when the rotating motor is started, an output shaft of the rotating motor drives the eccentric pendulum bob to rotate, the eccentric pendulum bob rotates to generate vibration, and the generated vibration is transmitted to the outer pipe through the supporting column and the flexible buffer sleeve, then transmitted to the inner oil pipe through the outer pipe and finally transmitted to the cement sheath; in the process, the flexible buffer sleeve plays a role in firmly clamping the support column in the outer pipe, so that strong collision between the support column and the outer pipe can be effectively prevented, and the service life of the vibration type cement sheath crusher is prolonged; on the other hand, the vibration amplitude of the eccentric pendulum can be reduced, and the inner oil pipe is prevented from being damaged due to overlarge vibration amplitude of the cement sheath breaker.

In a further preferred aspect, the rotating motor outer rim pad is provided with a flexible fixing ring, which is disposed between the rotating motor and the outer tube and is pressed and deformed after the assembly of the vibratory cement sheath breaker is completed.

The effect of above-mentioned scheme lies in: under the condition that the flexible fixing ring is arranged and is extruded and deformed after the vibration type cement sheath breaking device is assembled, the rotating motor is firmly fixed in the outer pipe, on one hand, the rotating motor cannot rigidly collide with the outer pipe due to vibration generated by the eccentric pendulum (only the condition that the flexible fixing ring absorbs all or part of vibration and flexibly transmits part of vibration to the outer pipe can be generated, and the vibration frequency and the amplitude are determined according to parameters such as the thickness and the material of the flexible fixing ring), and the problem that the vibration type cement sheath breaking device is short in service life due to collision and damage of the rotating motor can be effectively avoided; on the other hand, the problem of insufficient energy output caused by excessive consumption of vibration energy in the vibration type cement sheath crusher can be avoided.

In a further preferred scheme, the flexible fixed rings are in a fan-shaped ring shape, and at least two flexible fixed rings are arranged at intervals along the outer peripheral edge of the rotating motor.

The effect of above-mentioned scheme lies in: compared with a complete annular flexible fixing ring, the fan-shaped flexible fixing ring does not need to be sleeved on the outer edge of the rotating motor body in a whole mode, only needs to be attached to the outer edge of the rotating motor body, and therefore assembly convenience and assembly efficiency are improved.

In a further preferred scheme, the eccentric pendulum is fixed at the tail end of one end, away from the rotating motor body, of the output shaft, and the thickness calculation formula of the flexible buffer sleeve is as follows: t =1.9 tan α L, where T denotes the thickness of the flexible damping sleeve, α denotes the maximum permissible bending angle of the rotary motor output shaft, and C denotes the length of the rotary motor output shaft outside the rotary motor body.

The effect of above-mentioned scheme lies in: the thickness of flexible buffer sleeve is a comparatively important index, and too thickly will influence the output amplitude of vibration type cement sheath cracker, and too thin will influence the life of rotating the motor and the vibration output stability of vibration type cement sheath cracker, the utility model discloses according to the maximum allowable angle of buckling and the output shaft of rotating the motor output shaft lie in the reasonable thickness of calculating flexible buffer sleeve of the external length of rotation motor, guaranteed the vibration output stability of vibration type cement sheath cracker and the rationality of output amplitude.

In a further preferred aspect, the outer tube comprises: the clamping device comprises a clamping band and two semicircular half shells, wherein the two half shells are fastened together through the clamping band after being buckled.

The effect of above-mentioned scheme lies in: the semicircular half-shell structure is convenient for the installation of the eccentric vibration mechanism, and the fastening structure of the strap can rapidly complete the connection and fastening between the two half-shells after the installation of the eccentric vibration mechanism is completed, so that the assembly efficiency of the vibration type cement sheath crusher is improved on the one hand, and the reliability of the outer pipe is improved on the other hand.

In a further preferred embodiment, both of the half shells are provided with positioning grooves, and the vibratory cement sheath breaker further comprises: and the two ends of the positioning block are respectively inserted into the positioning grooves of the two half shells.

The effect of above-mentioned scheme lies in: the positioning groove and the positioning block structure can improve the connection reliability and stability of the two half shells on one hand, and can be used as a limiting structure for front-back left-right displacement; on the other hand, the quick positioning use of the two half shells can be rapidly completed, and the connecting efficiency of the two half shells is improved.

In a further preferred embodiment, the positioning grooves are provided with two groups, and the two groups of positioning grooves are respectively arranged at two ends of the half shell.

The effect of above-mentioned scheme lies in: the utility model discloses utilize two sets of constant head tanks to carry out quick location and temporary connection to half shell both ends respectively, further improved the connection reliability and the stability of two half shells.

A abandoned oil well treatment system comprising: the vibratory cement sheath breaker as described above. Since the waste oil well treatment system includes all technical features of the vibration-type cement sheath breaker, the waste oil well treatment system also includes all technical effects of the vibration-type cement sheath breaker, and further description is omitted here.

Compared with the prior art, the utility model provides a vibration type cement sheath knapper, include: the outer pipe is connected with the drill rod, the outer diameter of the outer pipe is smaller than the inner diameter of the waste oil well, and the difference between the outer diameter of the outer pipe and the inner wall of the waste oil well is less than or equal to 5mm; a plurality of eccentric vibration mechanisms are arranged in the outer pipe, the vibration frequency of the eccentric vibration mechanisms is larger than or equal to 8500Hz, and the vibration amplitude is smaller than or equal to 8mm. The utility model provides a vibration type cement sheath knapper acts on the interior oil pipe of abandonment oil well through the vibration of high vibration frequency, and then indirectly acts on the cement sheath in the interior oil pipe outside, destroys the cement sheath, and another part still piles up in the interior oil pipe outside with the form of cement fragment under making some broken cement drop, and then in making subsequent oil pipe cutting, the cutting knife can smoothly pass through the region that does not have cement or the clearance between the cement fragment (specifically depending on the cutting position); moreover, the utility model provides a vibration type cement sheath cracker can not lead to the integrality to be destroyed because of being hit by jumbo size structure and hit when oil pipe transmission vibration including low vibration frequency guarantees, and then guarantees to promote the abandonment pipeline section completely outside the oil well smoothly at oil pipe promotion in-process.

Drawings

Fig. 1 is a schematic structural view of a multi-layer casing cutting bullet for a shallow sea oil well disclosed in 922240485.

Fig. 2 is a schematic structural diagram of the mud cutting device for marine abandoned oil platform pipe removal disclosed in 2017108019743.

FIG. 3 is a perspective view of a vibratory cement sheath breaker in accordance with a preferred embodiment of the present invention.

Fig. 4 is a schematic view showing the structure of an eccentric vibration mechanism in the vibration-type cement sheath breaker according to the present invention.

FIG. 5 is a schematic view of the position of a flexible retaining ring for a vibratory-type cement sheath breaker according to the present invention.

FIG. 6 is a schematic diagram of the present invention showing the relationship between two half shells and the position of the two half shells and the band in a vibratory cement sheath breaker.

FIG. 7 is a cross-sectional view of a vibratory cement sheath breaker according to a further preferred embodiment of the present invention.

Fig. 8 is an enlarged view of a portion a in fig. 7.

FIG. 9 is a schematic view of a positioning groove formed in a half shell of a vibratory cement sheath breaker according to a further preferred embodiment of the present invention.

Fig. 10 is an enlarged view of a portion B in fig. 9.

Detailed Description

The utility model provides a vibration type cement sheath cracker and abandonment oil well processing system, for making the utility model discloses a purpose, technical scheme and effect are clearer, make clear and definite, and it is right that the following refers to the figure and lifts the example the utility model discloses further detailed description.

As mentioned above, due to the solid and heavy characteristics of the cement sheath, the cutting difficulty of the multi-layer casing is high, the length of the pipe to be cut and lifted each time is limited, and the same cutting and lifting actions are repeated for many times, which is very time-consuming and costly. An oil exploitation party often leases an oil exploitation platform in a lease mode, the lease price is about 50 yuan per second on average, and cutting waste oil wells with the length of thousands of meters needs extremely long time, and thousands of yuan can be saved through some simple changes. In fact, not only this, but also the following problems, due to the solid nature of the cement sheath, can result with the cement sheath intact: 1. the number of the layers of the casing which can be cut by the casing cutting device is greatly reduced, and the solid cement sheath consumes excessive power; 2. the service life of the sleeve cutting device is greatly reduced, and the structural stability of the sleeve cutting device is finally damaged due to the fact that the weight of the cutting knife is too large and the abrasion and the lifting are included.

On this basis, the utility model provides a vibration type cement sheath cracker, as shown in fig. 3, it includes: the outer pipe 100 and the eccentric vibration mechanism 200, the said outer pipe 100 is connected with the drilling rod, the drilling rod is the structural member of the original oil extraction system of drilling, the utility model uses the drilling rod to finish the fixation and position control of the outer pipe 100 (and then finish the whole vibrating cement sheath breaker); the eccentric vibration mechanism 200 is used to generate vibration and apply the vibration to the inner tubing and the cement sheath (if there is one or more layers of outer tubing) in the abandoned well through the outer tubing 100, the vibration will continue to be transmitted outward.

In a preferred embodiment of the present invention, the outer diameter of the outer pipe 100 is smaller than the inner diameter of the abandoned oil well (also the inner diameter of the inner oil pipe) and the difference from the inner diameter of the inner oil pipe is less than or equal to 5mm, so as to ensure that the vibration generated by the vibration-type cement sheath breaker can be effectively transmitted to the inner oil pipe. In adaptation, the amplitude of the eccentric vibration mechanism 200 is less than or equal to 8mm, so as to prevent the vibration type cement sheath breaker from damaging the integrity of the inner oil pipe; the vibration frequency of the eccentric vibration mechanism 200 is more than or equal to 8500Hz, so that the vibration type cement sheath breaker can provide vibration force enough to break the cement sheath. In the present invention, the vibration is circumferential vibration, so that the vibrating type cement sheath breaker can act on the cement sheath by 360 degrees, the vibration frequency is the vibration frequency of the vibrating object in unit time (the speed of the vibration of the object is indicated, the common symbol f indicates that the unit is times/second, also known as Hz), the amplitude is the physical quantity indicating the vibration range and intensity, and the absolute value of the maximum displacement of the balance position when the vibrating object is determined (usually indicated by symbol a, the unit is indicated by mm in the present invention).

The utility model provides a vibration type cement sheath cracker acts on the interior oil pipe of abandonment oil well through the vibration of high vibration frequency, then indirectly acts on the cement sheath in the interior oil pipe outside, destroys the cement sheath, makes some broken cement drop down another part and still piles up in the interior oil pipe outside with the form of cement fragment, and then in making subsequent oil pipe cutting, the cutting knife can smoothly pass through the clearance (specifically decide according to the cutting position) between the region or the cement fragment that does not have the cement; moreover, the utility model provides a vibration type cement sheath cracker can not be because of being hit by jumbo size structure and hit and lead to the integrality to be destroyed when oil pipe transmission vibration including low vibration frequency guarantees, and then guarantees to promote the abandonment pipeline section completely outside the oil well smoothly at oil pipe promotion in-process.

In specific implementation, the eccentric vibration mechanism 200 may be an eccentric vibration mechanism 200 disclosed in the patent application No. 2008102440091, or an eccentric vibration mechanism 200 of a vibratory roller disclosed in the patent application No. 2009101164737, or the like, and the present invention is not limited in particular. Preferably, however, the eccentric vibration mechanism 200 includes: as shown in fig. 4, the eccentric pendulum 220 is fixedly connected to an output shaft of the rotary motor 210, two support columns (wrapped inside the flexible buffer sleeve 230, not separately shown) are disposed on an end surface of the rotary motor 210 facing the eccentric pendulum 220, the flexible buffer sleeve 230 is sleeved on an outer edge of the support column, a support groove adapted to the support column is disposed on an inner side of the outer tube 100, and the flexible buffer sleeve 230 is in interference fit with the support groove. When the rotating motor 210 is started, the output shaft of the rotating motor 210 drives the eccentric pendulum 220 to rotate, the center point of the eccentric pendulum 220 is not on the axis of the output shaft of the rotating motor 210, so that the rotating motor 210 is in a state of continuously losing balance, continuous vibration which takes the axis of the output shaft as the center and takes the circumference as the track is caused by the inertia effect, and the generated vibration is transmitted to the outer pipe 100 through the supporting column and the flexible buffer sleeve 230, then transmitted to the inner oil pipe through the outer pipe 100 and finally transmitted to the cement ring; in the process, the flexible buffer sleeve 230 plays a role of firmly clamping the support column in the outer pipe 100, so that strong collision between the support column and the outer pipe 100 can be effectively prevented, and the service life of the vibration-type cement sheath breaker is prolonged; on the other hand, the amplitude of the vibration generated by the eccentric pendulum 220 can be reduced, and the situation that the integrity of the inner oil pipe is damaged due to the fact that the amplitude of the cement sheath breaker is too large is guaranteed. The specific material of flexible buffer cover 230 can select to use flexible materials such as rubber, plastic, the utility model discloses do not specifically limit, parameter such as thickness is so, and the skilled person can carry out adaptability selection and adjustment according to the utility model discloses a. And the connection mode between the flexible buffer sleeve 230 and the support column is preferably bonding, so as to ensure the connection stability of the flexible buffer sleeve and the support column and the operation reliability of the vibration type cement sheath breaker. It can be understood that the eccentric pendulum 220 structure illustrated in the present invention is only for illustration, and is not used to limit the protection scope of the present invention, and, on the basis of the present invention, the structure of the eccentric vibrating mechanism 200 is adaptively adjusted and selected, which also belongs to the protection scope of the present invention, specifically, the present invention is not listed one by one.

It should be noted that, when assembling the eccentric vibration mechanism 200, attention is paid to the consistency among the plurality of eccentric vibration mechanisms 200, that is, the consistency of the positions of the eccentric weights 220 among the respective eccentric vibration mechanisms 200 with respect to the outer pipe, if the consistency of the positions of the eccentric weights 220 among the respective eccentric vibration mechanisms 200 with respect to the outer pipe is high, the consistency of the vibrations finally output from the respective positions of the vibratory type cement sheath breaker is high, otherwise, if the consistency of the vibrations finally output from the respective positions of the vibratory type cement sheath breaker is low, the vibrations are easily output in a disordered manner, and the outer pipe is easily damaged and damaged. Optionally, after the eccentric vibration mechanism 200 is placed at a designated position, the position of the eccentric weights 220 can be corrected, so as to ensure that the center of gravity of each eccentric weight 220 is in the same straight line; of course, the relative position of the eccentric pendulum 220 with respect to the rotating motor 200 can be predetermined by marking before assembly, so as to ensure high consistency between the eccentric vibrating mechanisms 200 after assembly is completed; or, the relative position of the eccentric pendulum 220 and the rotating motor 200 is corrected by a special assembly jig after assembly and before installation into the outer pipe, and then the complete machine assembly of the vibrating cement sheath breaker is carried out; further alternatively, the present invention is not limited to a specific embodiment, and the present invention may be implemented by using the above-described combinations and adjustments to improve the positional uniformity of the eccentric weights 220 with respect to the outer pipe between the respective eccentric oscillating mechanisms 200.

Further, a flexible fixing ring 300 is padded on the outer edge of the rotating motor 210, the flexible fixing ring 300 is disposed between the rotating motor 210 and the outer pipe 100, and is extruded and deformed after the assembly of the vibration-type cement sheath breaker is completed. Under the condition that the flexible fixing ring 300 is arranged and the flexible fixing ring 300 is extruded and deformed after the assembly of the vibration-type cement sheath breaker is completed, the rotating motor 210 is firmly fixed inside the outer tube 100, on one hand, the rotating motor 210 cannot rigidly collide with the outer tube 100 due to the vibration generated by the eccentric pendulum 220 (only the condition that the flexible fixing ring 300 absorbs all or part of the vibration and transmits part of the vibration to the outer tube 100 flexibly, and the parameters such as the vibration frequency and the amplitude and the thickness and the material of the flexible fixing ring 300 are determined), and the problem that the service life of the vibration-type cement sheath breaker is short due to the collision and damage of the rotating motor 210 can be effectively avoided; on the other hand, the problem of insufficient energy output caused by excessive consumption of vibration energy in the vibration-type cement sheath breaker can be avoided.

The concrete structure of flexible solid fixed ring 300 can select to set up to establish the complete annular of rotating motor 210 body outer fringe, also can select to set up to incomplete fan ring structure, and concrete material can select to use flexible material such as rubber, plastic, the utility model discloses do not specifically prescribe a limit to, thickness isoparametric is also so, and the skilled person in the art can carry out adaptability selection and adjustment according to the utility model discloses a content.

As shown in fig. 5, it is preferable that the flexible fixing rings 300 have a fan-shaped ring shape, and at least two flexible fixing rings 300 are arranged at intervals along the outer circumference of the rotating motor 210. Compared with the complete annular flexible fixing ring 300, the fan-shaped flexible fixing ring 300 is not required to be sleeved on the outer edge of the rotating motor 210 body, and only needs to be attached to the outer edge of the rotating motor 210 body, so that the assembly convenience and the assembly efficiency are improved.

In specific implementation, the eccentric pendulum 220 is fixed at the end of the output shaft away from the end of the rotating motor 210, and the thickness of the flexible buffer sleeve 230 is calculated according to the following formula: t =1.9 tan α L, where T denotes the thickness of the flexible damping sleeve 230, α denotes the maximum allowable bending angle of the output shaft of the rotating electrical machine 210, C denotes the length of the output shaft of the rotating electrical machine 210 outside the body of the rotating electrical machine 210, and 1.9 is a reasonable empirical coefficient for optimization verified by experiments. The thickness of flexible buffer cover 230 is a comparatively important index, and too thickly will influence the output amplitude of vibration type cement sheath cracker, and too thin will influence the life of rotating motor 210 and the vibration output stability of vibration type cement sheath cracker, the utility model discloses according to the maximum allowable angle of buckling and the output shaft of rotating motor 210 output shaft lie in the reasonable thickness of the flexible buffer cover 230 of calculating of this external length of rotating motor 210, guaranteed the vibration output stability of vibration type cement sheath cracker and the rationality of output amplitude.

According to another aspect of the present invention, the outer tube 100 includes: the band 120 and the two semicircular half shells 110 are fastened together by the band 120 after the half shells 110 are fastened together, as shown in fig. 6 and 7.

In this embodiment, when assembling the vibration-type cement sheath breaker, the two flexible buffer sleeves 230 are adhered to the inner walls of the two half-shells 110, the assembled rotating motor 210 and eccentric pendulum 220 are placed in one of the half-shells 110, the other half-shell 110 is covered in an aligned position, and the band 120 is pulled to pass around the two half-shells 110 to fasten the two half-shells 110 together. The semicircular half shell 110 structure facilitates the installation of the eccentric vibration mechanism 200, and the fastening structure of the band 120 can rapidly complete the connection and fastening between the two half shells 110 after the installation of the eccentric vibration mechanism 200, thereby improving the assembly efficiency of the vibration-type cement sheath breaker on one hand and the reliability of the outer tube 100 on the other hand.

As shown in fig. 8, the first end of the band 120 is connected to the outer tube 100 through the rotating shaft 130, and the second end is connected to the stopper 140 and is held in the stopper groove 171 of the outer tube 100 through the stopper 140. As shown in fig. 10, the limiting groove 171 is opened in the middle of one (two symmetrically arranged) outer extension portion 170 of the outer tube 100, and the opening is downward; the avoiding groove 180 is formed in one side of the extending portion 170, when the band portion 120 is fixed, the band portion is firstly tightened to penetrate through the avoiding groove 180, the limiting block 140 is aligned with the limiting groove 171 after passing through the extending portion 170, the band portion 120 is loosened to enable the limiting block 140 to be clamped into the limiting groove 171, and the fixing of the band portion 120 and the two half shells 110 is completed. It will be appreciated that, without the presence of the stop slots 180, the stop blocks 140 may pass beyond the outer extensions 170 from the outside of the half-shell 110, but this would necessitate lengthening the band 120, which effect is not significant at small dimensions, but which effect would be amplified to the extent that it affects the reliability of the fixing of the outer tube 100, given the fact that oil wells often have diameters of a few metres or even tens of metres.

In the preferred embodiment of the present invention, the bands 120, the stoppers 140 and the limiting grooves 171 are provided with a plurality of sets, which can correspond to the number and positions of the eccentric vibrating mechanisms 200, and can also be adjusted in accordance with the diameter of the oil well to select the number and position of the bands.

According to the utility model discloses on the other hand, two locating groove 150 has all been seted up to half shell 110, the vibration type cement sheath cracker still includes: and two ends of the positioning block are respectively inserted into the positioning grooves 150 of the two half shells 110. The positioning groove 150 and the positioning block structure can improve the connection reliability and stability of the two half shells 110 and can be used as a limiting structure for front-back left-right displacement; on the other hand, the quick positioning and use of the two half shells 110 can be quickly completed, and the connecting efficiency of the two half shells 110 is improved.

Specifically, two sets of positioning grooves 150 are formed in the positioning groove 150, and the two sets of positioning grooves 150 are respectively disposed at two ends of the half shell 110. The utility model discloses utilize two sets of constant head tanks 150 to advance line location and temporary connection respectively to half shell 110 both ends, further improved the connection reliability and the stability of two half shells 110.

In a specific implementation, the outer tube 100 further includes: a threaded pipe section (not shown, see fig. 3) for connecting drill rods, to which the present invention will not be described again.

The utility model also provides an abandonment oil well processing system, it includes: the vibratory cement sheath breaker as described above. Since the waste oil well treatment system includes all technical features of the vibration-type cement sheath breaker, the waste oil well treatment system also includes all technical effects of the vibration-type cement sheath breaker, and further description is omitted here.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.

Claims (9)

1. A vibratory cement sheath breaker, comprising: the outer pipe is connected with the drill rod, the outer diameter of the outer pipe is smaller than the inner diameter of the waste oil well, and the difference between the outer pipe and the inner wall of the waste oil well is less than or equal to 5mm; a plurality of eccentric vibration mechanisms are arranged in the outer pipe, the vibration frequency of the eccentric vibration mechanisms is larger than or equal to 8500Hz, and the vibration amplitude of the eccentric vibration mechanisms is smaller than or equal to 8mm.

2. The vibratory cement sheath breaker of claim 1 wherein said eccentric vibration mechanism comprises: rotate motor and eccentric pendulum, eccentric pendulum fixed connection in rotate the output shaft of motor, it is provided with two support columns to rotate the motor towards eccentric pendulum one end terminal surface, support column outer fringe cover is equipped with flexible buffer sleeve, the outer tube inboard be provided with the support groove of support column looks adaptation, flexible buffer sleeve with support groove interference fit.

3. The vibratory cement sheath breaker of claim 2 wherein said rotating motor is cushioned with a flexible retaining ring disposed between said rotating motor and said outer tube and which is crushed upon completion of assembly of the vibratory cement sheath breaker.

4. The vibratory cement sheath breaker of claim 3 wherein said flexible retainer rings are fan-shaped and are provided in at least two spaced apart relationship along the outer periphery of the rotary motor.

5. A vibratory-type cement sheath breaker apparatus as set forth in claim 2 wherein said eccentric pendulum is fixed to the end of said output shaft distal from the rotating motor body, and the thickness of said flexible buffer sleeve is calculated by the formula: t =1.9 tan α L, where T denotes the thickness of the flexible damping sleeve, α denotes the maximum permissible bending angle of the output shaft of the rotary electric machine, and C denotes the length of the output shaft of the rotary electric machine outside the body of the rotary electric machine.

6. The vibratory cement sheath breaker of claim 1 wherein said outer tube comprises: the clamping device comprises a clamping band and two semicircular half shells, wherein the two half shells are fastened together through the clamping band after being buckled.

7. A vibratory cement sheath breaker according to claim 6 wherein both of said half shells are provided with locating grooves, said vibratory cement sheath breaker further comprising: and the two ends of the positioning block are respectively inserted into the positioning grooves of the two half shells.

8. The vibratory cement sheath breaker apparatus of claim 7 wherein said positioning slots are provided in two sets, said two sets being disposed at respective ends of said half shell.

9. A abandoned oil well treatment system, comprising: the vibratory cement sheath breaker of any one of claims 1-8.

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