CN119021595A - A new type of floating coupling and diameter method - Google Patents
A new type of floating coupling and diameter method Download PDFInfo
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- CN119021595A CN119021595A CN202310604046.3A CN202310604046A CN119021595A CN 119021595 A CN119021595 A CN 119021595A CN 202310604046 A CN202310604046 A CN 202310604046A CN 119021595 A CN119021595 A CN 119021595A
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- Prior art keywords
- sleeve
- fitting portion
- assembly
- rupture disc
- impact
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
本发明提供一种新型漂浮接箍，包括：上接头，上接头包括接头部和组装部，组装部的内径小于接头部的内径；设置在组装部下端的下接头；密封式固定套设在组装部内的封堵组件；通过剪切销钉设置在组装部内的撞击套；其中，撞击套设置在封堵组件的上方，撞击套的上端受压面的面积大于下端受压面的面积，从而使撞击套能够在压力作用下剪断剪切销钉，撞向封堵组件。本发明既能实现破裂盘破碎后管柱全通径，还能降低施工风险，同时具有结构简单，施工方便等特点。
The present invention provides a new type of floating coupling, including: an upper joint, the upper joint includes a joint part and an assembly part, the inner diameter of the assembly part is smaller than the inner diameter of the joint part; a lower joint arranged at the lower end of the assembly part; a sealing fixed sleeve arranged in the assembly part; an impact sleeve arranged in the assembly part through a shear pin; wherein the impact sleeve is arranged above the plugging assembly, and the area of the upper end pressure surface of the impact sleeve is larger than the area of the lower end pressure surface, so that the impact sleeve can cut the shear pin under pressure and hit the plugging assembly. The present invention can not only realize the full diameter of the pipe column after the rupture disk is broken, but also reduce the construction risk, and at the same time has the characteristics of simple structure and convenient construction.
Description
Technical Field
The invention belongs to the technical field of oil and gas drilling and completion and reservoir transformation, and particularly relates to a novel floating coupling and an drift diameter method of the floating coupling.
Background
In the development process of the oil and gas well, along with the deep exploration and development, the oil and gas well faces the problems of large water-to-vertical ratio, insufficient self weight of the pipe column and the like caused by long horizontal sections, so that the horizontal sections have large friction torque when the pipe column is put down, the pipe column is difficult to put down and the like.
The novel floating collar casing running technology can effectively solve the well completion pipe string running difficulty of a large-displacement well and a long horizontal section horizontal well. The technology is characterized in that a section of air or low-density drilling fluid is sealed at the lower part of a casing string through a novel floating collar, so that the casing string is in a floating state in slurry of a large well inclined section or a horizontal section, friction between the lower casing string and a well wall is reduced, and after the casing string is put in place, the inside of the casing string is unblocked through a mode of opening the sealed section.
In the prior art, a novel floating collar with a rupture disc is arranged, the novel floating collar seals a section of air or low-density drilling fluid through the rupture disc, and after a pipe column is in place, the rupture disc is broken by adopting a direct pressure-holding mode. However, in a pressure-holding manner, there may be a situation that the rupture disc is not completely broken, so that the pipe string may not yet achieve the full diameter. When the rupture disc is not completely ruptured, on one hand, the passing performance of a well cementation rubber plug in the subsequent work can be influenced, when the fixed rubber plug passes, the fixed rubber plug is damaged by the residual rupture disc, and residual cement in the pipe column cannot be effectively scraped, so that the actual opening pressure of tools such as a preset differential pressure sliding sleeve in the pipe column is increased, the passing safety of other tools needing to pass is reduced, and the construction risk is increased; on the other hand, the well cementation rubber plug can be thoroughly destroyed, the well cementation quality is seriously influenced, even the well cementation rubber plug is in collision and compression failure and sealing failure are caused, and cement is caused to flow back to the well shaft, so that the complex situation of the well shaft is caused.
In addition, in the prior art, another novel floating coupling with a sliding sleeve rupture disc still exists, and a movable rupture disc and a fixed impact sleeve are arranged in the novel floating coupling, wherein the rupture disc is arranged above the impact sleeve, and the impact sleeve and the rupture disc are fixed through a shear pin. When it is desired to fracture the rupture disc, pressure is pumped from above the rupture disc to push the rupture disc to shear the shear pin and then strike against the impingement sleeve, thereby completely fracturing the rupture disc. The technology can realize the full diameter of the pipe column, but in the process of the running-in, the rupture disc must be ensured not to generate relative displacement with the main pipe column of the novel floating coupling, and in the structure, a large number of shearing pins must be used for fixing the rupture disc, so that the normal work of the rupture disc in the process of the running-in is ensured. Therefore, the structure has the advantages of large number of shearing pins, high control difficulty and multi-row structure distribution, and the pins can be sheared in advance due to uneven stress and process failure under the pressure of mud in the well, so that the pipe column cannot be smoothly put in place. The arrangement of a plurality of shear pins can lead to the need of extremely large pumping pressure in the process of breaking the rupture disc, the shear pins are sheared by bearing pressure of the rupture disc, the rupture disc can be broken in advance under the pumping pressure, and once the rupture disc is broken or sealed to be invalid before the shear pins are broken due to unexpected conditions, the shear pins can not be sheared, so that the rupture disc can not collide to an impact sleeve, the full diameter of a tubular column can not be realized, and the follow-up construction operation is seriously influenced.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a novel floating coupling which can realize the full diameter of a pipe column and reduce the risk of working accidents.
Aiming at the technical problems, the invention aims to provide a floating coupling drift diameter method which can realize the full drift diameter of a pipe column and reduce the risk of working accidents.
According to the present invention, there is provided a novel floating collar comprising: the upper connector comprises a connector part and an assembling part, and the inner diameter of the assembling part is larger than that of the connector part; a lower joint arranged at the lower end of the assembly part; the sealing assembly is fixedly sleeved in the assembly part; an impingement sleeve disposed within the assembly by shear pins; the impact sleeve is arranged above the plugging assembly, and the area of the upper end compression surface of the impact sleeve is larger than that of the lower end compression surface, so that the impact sleeve can shear the shearing pin under the action of pressure and collide to the plugging assembly.
In one embodiment, an upper portion of the lower connector extends into the assembly portion and abuts the closure assembly.
In one embodiment, a connecting cylinder is sleeved between the impact sleeve and the assembly part, the upper end and the lower end of the connecting cylinder are respectively abutted to the joint part and the plugging component, and the impact sleeve is fixedly connected with the connecting cylinder through a shearing pin.
In one embodiment, the impingement sleeve comprises a first nesting portion and a second nesting portion, the first nesting portion having an outer diameter greater than an outer diameter of the second nesting portion, the first nesting portion having an inner diameter equal to an inner diameter of the second nesting portion; the connecting cylinder comprises a third sleeving part and a fourth sleeving part, and the inner diameter of the third sleeving part is larger than that of the fourth sleeving part; a seal is provided between the first and third nesting portions and a seal is provided between the second and fourth nesting portions.
In one embodiment, the closure assembly includes a base and a rupture disc fixedly disposed on the base, the rupture disc capable of sealing the base.
In one embodiment, a first step is arranged on the inner wall of the base, the rupture disc is arranged on the first step, and two ends of the rupture disc are respectively abutted with the step surface of the first step and the connecting cylinder.
In one embodiment, an end seal is provided between the rupture disc and the fourth sleeve portion.
In one embodiment, a second step is further provided on the inner wall of the base, and an inner diameter of the second step is greater than or equal to an outer diameter of the second sleeve portion.
In one embodiment, the rupture disc is made of a high pressure resistant frangible nonmetallic material including glass, ceramic, the rupture disc is cylindrical or spherical shell shaped, and the shear pin is a soluble pin.
According to the invention, there is also provided a floating collar diameter method, using the novel floating collar provided by the invention, comprising the following steps: pumping isolating liquid for protecting the shearing pin (33) into the floating collar well section; pumping mud into the well, and increasing pumping pressure to realize the drift diameter.
Compared with the prior art, the application has the following advantages.
When the pipe column is put down, mud is isolated through the rupture disc, a section of air or low-density drilling fluid is sealed between the novel floating coupling and the connected pipe column, and the weight of the pipe column entering the large well inclined section or the horizontal section is reduced by utilizing buoyancy, so that the friction for putting down the pipe column is reduced, and the pipe column is helped to be put down in place smoothly. In the invention, the rupture disc is fixedly arranged in the assembly part, and the striking sleeve is arranged in the assembly part only through a small amount of shearing pins, so that the pin control difficulty is reduced. In the process of breaking the rupture disc, the impact sleeve realizes displacement by utilizing the end face pressure difference between the upper end and the lower end of the impact sleeve, shears the shear pin, collides against the rupture disc, and then brings out fragments of the rupture disc in a circulating mode. With this arrangement, the impingement sleeve is able to complete displacement under pressure against the rupture disc even if the rupture disc fails in advance of the rupture event. The invention can realize the full diameter of the tubular column after the rupture disc is broken, can reduce the construction risk, and has the characteristics of simple structure, convenient construction and the like.
Drawings
The present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a schematic representation of an initial state of one embodiment of a novel floating collar according to the present invention;
FIG. 2 shows a schematic view of a rupture disc broken in accordance with an embodiment of the novel floating collar of the present invention;
fig. 3 shows a schematic view of another embodiment of a rupture disc according to the present invention.
In the figure: 1. an upper joint; 11. a joint part; 12. an assembling part; 2. a plugging assembly; 21. a base; 211. a first step; 22. a rupture disc; 31. a striking sleeve; 311. a first engaging portion; 312. a second engaging portion; 32. a connecting cylinder; 321. a third engaging portion; 322. a fourth engaging portion; 33. shearing pins; 4. a lower joint; 5. and (5) an end face sealing ring.
In the present application, all of the figures are schematic drawings which are intended to illustrate the principles of the application only and are not to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
In the present application, it should be noted that the direction of the down-hole near the wellhead according to the present application is described as "upstream", "upper end" or the like, i.e., the left side as shown in fig. 1; the direction away from the wellhead is described as "downstream", "lower end" or the like, i.e. to the right as shown in fig. 1.
Fig. 1 shows the structure of a novel floating collar 100 according to the present invention. As shown in fig. 1, the novel floating collar 100 comprises an upper joint 1, a lower joint 4, a plugging assembly 2 and an impingement sleeve 31. The upper joint 1 includes a joint portion 11 and an assembly portion 12 provided at a lower end of the joint portion 11, the assembly portion 12 having an inner diameter larger than that of the joint portion 11. The lower joint 4 is sealingly provided at the lower end of the assembly part 12 by means of a threaded connection. It will be readily appreciated that both the upper and lower sub 1, 4 are capable of connecting other tubular strings. The plugging assembly 2 and the impact sleeve 31 are both arranged in the assembly part 12, wherein the plugging assembly 2 is fixedly arranged in the assembly part 12 in a sealing manner, and the impact sleeve 31 is fixedly arranged in the assembly part through the shear pin 33 and is positioned above the plugging assembly 2. And, the pressure receiving area of the upper end of the impingement sleeve 31 is larger than that of the lower end. When the full diameter of the pipe column is required to be realized, pumping pressure is pumped into the novel floating coupling 100 from the wellhead direction, the pressure bearing surfaces at the upper end and the lower end of the impact sleeve 31 are under the same pressure, when the pressure difference between the pressure bearing surfaces at the upper end and the lower end is larger than the rated pressure of the shear pin 33, the shear pin 33 is sheared, and the impact sleeve 31 can collide against the plugging assembly 2, so that the plugging assembly 2 is broken, and the full diameter is realized. In this arrangement, even if the closure assembly 2 fails, the normal operation of the impingement sleeve 31 is not affected, since the closure assembly 2 no longer controls the shear pins 33 to be cut. In addition, the stress area of the impact sleeve 31 is small, and the pressure born by the impact sleeve 31 is small under the same pressure, so that the number of required shear pins 33 is small, the control difficulty of the shear pins 33 in the design production process of the device is reduced, and meanwhile, the pressure control difficulty in the pumping process is also reduced.
According to a preferred embodiment of the invention, a connecting cylinder 32 is provided between the striking sleeve 31 and the assembly portion 12. The upper end of the connecting tube 32 abuts against the joint 11, and the lower end abuts against the plugging assembly 2. The striking sleeve 31 is fixedly connected with the connecting cylinder 32 through the shear pin 33. By this arrangement of the connecting cylinder 32, on the one hand, the purpose of fixedly connecting the striking bush 31 and the assembling portion 12 by the shear pin can be achieved; on the other hand, the shearing pin is not directly attached to the assembly portion 12, and the overall strength and sealing performance of the assembly portion 12 are enhanced. In the use process of the device, the connecting cylinder 32 can also receive the force in the axial direction, such as the force transmitted to the connecting cylinder 32 by the impact sleeve 31, and the force received by the pressure difference of the end face of the connecting cylinder 32, so that the two ends of the connecting cylinder 32 can be fixed more firmly and reliably by abutting against other components.
In a specific embodiment, the striking sleeve 31 includes a first engaging portion 311 and a second engaging portion 312 disposed at a lower end of the first engaging portion 311, the first engaging portion 311 having an outer diameter larger than an outer diameter of the second engaging portion 312, and the first engaging portion 311 having an inner diameter equal to an inner diameter of the second engaging portion 312; the connecting cylinder 32 comprises a third sleeving part 321 and a fourth sleeving part 322 arranged at the lower end of the third sleeving part 321, wherein the inner diameter of the third sleeving part is larger than that of the fourth sleeving part; a sealing member is arranged between the first sleeve part and the third sleeve part, and a sealing member is arranged between the second sleeve part and the fourth sleeve part. Under the arrangement, the upper end pressure-bearing surface of the impact sleeve 31 is the upper end surface of the first sleeve part 311, the lower end pressure-bearing surface of the impact sleeve 31 is the lower end surface of the second sleeve part 312, and under the same pressure, the axial pressure born by the upper end surface of the first sleeve part 311 is greater than the axial pressure born by the lower end surface of the second sleeve part 312, so that the purpose that the impact sleeve 31 shears the shear pin 33 to collide against the plugging component 2 under the action of pumping pressure is achieved. The difference between the area of the upper end surface of the first engaging portion 311 and the area of the lower end surface of the second engaging portion 312 can be enlarged or reduced according to the actual use requirement, and can be achieved by adjusting the inner diameter and the outer diameter of the two.
It will be readily appreciated that there is no sealing connection between the upper end of the impingement sleeve 31 and the joint 11, and therefore the upper and lower ends of the impingement sleeve 31 are equally pressurized. The force generated upon compression of the air in the closed annular space formed between the impingement sleeve 31 and the connecting cylinder 32 is insufficient to affect movement of the impingement sleeve 31.
In a specific embodiment, the plugging assembly 2 is fixedly disposed within the assembly portion 12 by abutting against other components. Specifically, the upper portion of the lower connector 4 extends into the assembly portion 12 and abuts against the lower end of the plugging assembly 2, and in combination with the above embodiment, the upper end of the plugging assembly 2 abuts against the connecting tube 32. Thereby completing the fixation of the closure assembly 2.
In a preferred embodiment, closure assembly 2 includes a base 21 and a rupture disc 22 fixedly disposed on the base. The axial length of base 21 is greater than the axial length of rupture disc 22 to facilitate installation of closure assembly 2 into upper sub 1. In addition, rupture disc 22 is constructed of a high pressure resistant, brittle non-metallic material, such as glass, ceramic, etc., in order to withstand a certain pressure and to be crushed by impact sleeve 31. In addition, rupture disc 22 may be configured in other shapes, such as the spherical shell shape shown in fig. 3, in addition to the cylindrical shape shown in fig. 1, in order to improve the pressure resistance of rupture disc 22 at the same thickness.
In a specific embodiment, a first step 211 is provided on the inner wall of base 21, rupture disc 22 is provided on first step 211, the cylindrical diameter of first step 211, i.e., the diameter of the rupture disc, is greater than the inner diameter of connecting cylinder 32, so that the left end of rupture disc 22 can abut connecting cylinder 32, and the right end of rupture disc 22 abuts the end face of first step 211. Meanwhile, in order for rupture disc 22 to achieve a sealing effect, a sealing ring may be provided between the contact surface of rupture disc 22 with first step 211 and/or connecting cylinder 32. In the present embodiment, a seal groove is provided in the lower end face of the connecting tube 32, and an end face seal ring 5 is provided in the seal groove. The installation of the end face sealing ring 5 between the rupture disc 22 and the connecting cylinder 32 is more convenient than the installation of the sealing ring on the step surface of the first step 221, the installation of the sealing ring on the step surface of the first step 221 can lead to the expansion of the overall outer diameter, while the installation of the sealing ring shown in fig. 1 can obtain wider shoulder support and protect the weak boundary position of the rupture disc 22, and can also obtain thicker impact sleeve 31 with larger impact strength, so that the floating coupling has the full diameter of the full pipe column, has smaller tool outer diameter on the full pipe column, and is convenient for the falling-in of the pipe column.
In combination with the above embodiments, the assembly process of the present invention is as follows: firstly, installing sealing rings in sealing grooves of an impact sleeve 31 and a connecting cylinder 32 respectively, sleeving the impact sleeve 31 in the connecting cylinder 32 according to the position shown in fig. 1, inserting a shearing pin from the outer side of the connecting cylinder 32, fixing the impact sleeve 31 and the connecting cylinder 32, and installing an end face sealing ring 5 in the sealing groove of the connecting cylinder 32 to complete the assembly of the first part; then, the rupture disc 22 is mounted on the first step 211, and a sealing ring for sealing with the assembly part is mounted on the outer wall of the base 21 through a sealing groove, so that the second part is mounted; finally, the first and second parts are sequentially fed from the lower end of the upper joint 1, and the lower joint 4 is mounted at the lower end of the upper joint 1. The sealing rings used in the sealing modes comprise framework sealing rings, O-shaped sealing rings and the like.
According to a specific embodiment of the present invention, a second step 212 is further disposed on the inner wall of the base 21, and an inner diameter of the second step 212 is equal to or greater than an outer diameter of the second engaging portion 312. With this arrangement, as shown in fig. 2, after the impingement sleeve 31 is forced against the rupture disc 22, the lower end of impingement sleeve 31 is able to pass over the rupture disc to the position shown in fig. 2, thereby providing a more effective seal against the remaining annular portion of rupture disc 22.
The present invention enables a variety of modes of use by controlling the strength of shear pin 33, wherein the method of use of reducing run-in friction by plugging a section of air or low density drilling fluid through rupture disc 22 is the same as the prior art, and differs primarily in the manner in which rupture disc 22 breaks after the run-in pump has been put in place, as follows.
Mode one: when shear pin 33 is of lesser strength, i.e., the breaking of shear pin 33 precedes the blasting of rupture disc 22. After pumping pressure, the impact sleeve 31 generates downward movement trend under the action of pressure, the shear pin 33 is sheared by the impact sleeve 31, then the impact sleeve 31 impacts the rupture disc 22, the impact of the impact sleeve 31 enables a weak point on the rupture disc 22 to be matched with the profile of the impact sleeve 31, after pumping pressure is increased, the rupture disc 22 bursts along the profile formed by the weak point to form fine particles, and the full diameter is realized.
It will be readily appreciated that the high pressure resistant brittle nonmetallic materials such as glass, ceramic, etc. used in this embodiment have the physical property of being forced again once the weak point has occurred and then detonating along the contour created by the weak point.
Mode two: when shear pin 33 has a strength greater than one, the rupture of shear pin 33 still precedes the rupture of rupture disc 22. After pumping the pressure, the impact sleeve 31 generates a downward movement trend under the action of the pressure, the shear pin 33 is sheared by the impact sleeve 31, then the impact sleeve 31 impacts the rupture disc 22, the impact of the impact sleeve 31 causes the through holes which are matched with the outline of the impact sleeve 31 to appear on the rupture disc 22, and the part which is separated from the rupture disc 22 after impact is instantaneously crushed into fine particles. And finally, the effect shown in fig. 2 is presented, and the full-path is realized. In this manner, even if rupture disc 22 fails in advance of the rupture of shear pin 33, such as in the event of an unexpected event, rupture disc 22 breaks under a pumping pressure below its rated strength, impingement sleeve 31 will still impinge upon rupture disc 22 without affecting the full path.
Mode three: when shear pin 33 is stronger than mode two, i.e., after pumping pressure, impingement sleeve 31 is forced downward, but rupture disc 22 ruptures prior to shear pin 33, i.e., the body portion bursts into finely divided particles, but there may be a residual edge. After continuing to pressurize, shear pin 33 is sheared by impingement sleeve 31, and then impingement sleeve 31 impinges against rupture disc 22, impingement of impingement sleeve 31 causing a through-hole in rupture disc 22 that matches the contour of impingement sleeve 31 to rupture the edge residue of rupture disc 22 into finely divided particles, eventually exhibiting the effect shown in FIG. 2, achieving a full diameter.
In a third aspect of the present invention, it is necessary to pump over the burst pressure of rupture disc 22 to fracture shear pin 33. Under such high pressure pumping, mud within the wellbore may be forced into the formation, contaminating the energy reserves of the formation, thereby reducing production. To solve this problem, the present invention provides another embodiment, specifically, a fourth embodiment as described below.
Mode four: in a preferred embodiment, shear pin 33 is a soluble pin made of a high strength soluble material. Before the soluble pin is installed, the solid cosolvent is fed into the pin hole where the soluble pin is installed for half filling, and then the soluble pin is installed into the pin hole. The floating collar well section is arranged at the junction of the horizontal well and the vertical well, after the floating collar is put down, a section of isolation liquid needs to be pumped into the floating collar well section firstly in the grouting process, then slurry is pumped into the floating collar well section, namely the pumping isolation liquid fills the horizontal well at the upstream of the floating collar, and then the slurry is pumped into the floating collar well. The slurry is isolated from the solid cosolvent and the soluble pin through the isolating liquid, so that the solid cosolvent is prevented from being soaked in the slurry, and the soluble pin is promoted to be dissolved in advance. The specific operation principle of the present embodiment is as follows.
After pumping pressure, rupture disc 22 ruptures prior to the soluble spike. After the rupture disc 22 is ruptured, the pre-pumped spacer fluid is displaced by the mud above and down the string, thereby disabling the spacer fluid, i.e., the spacer fluid loses its protection against the solid co-solvent, which comes into contact with the mud. The solid cosolvent dissolves in the slurry, and the soluble pin is promoted to dissolve rapidly. After the soluble pin is dissolved to reduce the strength, the soluble pin can be sheared by the liquid column pressure or the circulating pressure of the subsequent underground operation without increasing the pumping pressure, so that the impact sleeve 31 is accelerated downwards to impact the residual part of the rupture disc 22 after being blasted, and secondary crushing is realized. After impingement sleeve 31 penetrates rupture disc 22, a full path is achieved. Even if the impact force generated by the impact sleeve 31 cannot thoroughly clear the residual part of the rupture disc 22 under the condition of lower liquid column pressure or circulating pressure, the impact sleeve 31 can squeeze and crush the residual part of the rupture disc 22 after blasting through the pressure difference acting force which is always present in the pipe column (namely in the floating coupling) and acts on the impact sleeve 31, and the compressive strength is greatly reduced under the action of impact crushing due to the fact that the residual part of the rupture disc 22 after blasting does not have integrity, so that the residual part can be crushed into fine particles through the squeezing action, and the full-diameter is realized. In this arrangement, on the one hand, the required pumping pressure need not exceed the burst pressure of rupture disc 22, thereby addressing the potential for mud intrusion into the formation at high pressures; on the other hand, the shear pin 33 is a soluble pin, and the strength of the shear pin 33 is reduced by dissolving, so that the impact action of the impact sleeve 31 can be more reliably completed, and the condition that the shear pin 33 cannot be sheared under the pressure operation window is avoided.
It is readily understood that spacer fluids, high strength soluble materials, and solid co-solvents are all existing materials that, after contacting the slurry, promote dissolution of the high strength soluble materials.
To further simplify the assembly of the present invention, the present invention also provides another embodiment of the closure assembly 2, the connector barrel 32 and the lower connector 4, in which the base 21 and the connector barrel 32 are integrally formed, with the second step 212 of the base 21 and portions below it removed in fig. 1, and the upper end surface of the lower connector 4 is lengthened to allow it to abut the rupture disc 22. By this arrangement, the number of parts of the base 21 is reduced, and the assembly difficulty of the present invention is simplified. Correspondingly, a step is arranged at the upper end of the lower joint 4 and serves as an original second step.
According to the mode of breaking the rupture disc provided by the invention, the design strength of the shearing pin 33 can be within a large range on the premise that the full-diameter floating collar 100 can be realized, so that the design difficulty of the shearing pin 33 is reduced, the impact strength of the impact sleeve 31 is reduced, the phenomena that the tip of the impact sleeve 31 is possibly deformed and damaged under the condition of overlarge impact tonnage are prevented, and the performance requirement and the control difficulty of the impact sleeve 31 are reduced. In addition, the pumping pressure in the invention can be in a large range, thereby reducing the difficulty of controlling the pumping pressure. As wellbore depths and drop depths continue to increase, higher pressure ratings of rupture disc 22 are required. If the sliding sleeve rupture disc type floating coupling in the prior art is used, the control difficulty of the shearing pin and the striking sleeve is further increased under a certain pressure operation window. Therefore, to reduce construction difficulties, two lower pressure-bearing levels of rupture discs 22 are typically used to run in the pipe string in a double float manner at different well depths of the pipe string. But the floating coupling can meet the requirement of the full diameter of the pipe column after the rupture disc 22 with high bearing level is crushed, so as to achieve the purposes of reducing cost and enhancing efficiency. Of course, the invention can also be compatible with the construction requirements of the double-floating running-in, thereby further covering the running-in requirements of the pipe column under the well conditions of deep wells, ultra-deep wells and the like.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that the above description is only of a preferred embodiment of the invention and is not to be construed as limiting the invention in any way. Although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the techniques described in the foregoing examples, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310604046.3A CN119021595A (en) | 2023-05-26 | 2023-05-26 | A new type of floating coupling and diameter method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310604046.3A CN119021595A (en) | 2023-05-26 | 2023-05-26 | A new type of floating coupling and diameter method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119021595A true CN119021595A (en) | 2024-11-26 |
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| CN202310604046.3A Pending CN119021595A (en) | 2023-05-26 | 2023-05-26 | A new type of floating coupling and diameter method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120042475A (en) * | 2025-04-25 | 2025-05-27 | 德州景美石油机械有限公司 | Casing floating coupling structure |
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| US20210404278A1 (en) * | 2020-06-30 | 2021-12-30 | Rubicon Oilfield International, Inc. | Impact-triggered floatation tool |
| CN112412342A (en) * | 2020-12-15 | 2021-02-26 | 中国石油天然气集团有限公司 | Breakable blind plate type floating coupling device, using method and preparation method of blind plate |
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| CN120042475A (en) * | 2025-04-25 | 2025-05-27 | 德州景美石油机械有限公司 | Casing floating coupling structure |
| CN120042475B (en) * | 2025-04-25 | 2025-07-22 | 德州景美石油机械有限公司 | Casing floating coupling structure |
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