CN212535596U - Casing patching tool and metal sealing structure thereof - Google Patents
Casing patching tool and metal sealing structure thereof Download PDFInfo
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- CN212535596U CN212535596U CN202020545282.4U CN202020545282U CN212535596U CN 212535596 U CN212535596 U CN 212535596U CN 202020545282 U CN202020545282 U CN 202020545282U CN 212535596 U CN212535596 U CN 212535596U
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Abstract
The utility model relates to a sleeve pipe subsidy instrument and metal seal structure thereof. The casing patching tool comprises a patching liner tube and metal sealing structures arranged at two ends of the patching liner tube; the metal sealing structure comprises a sealing ring group sleeved on the patching liner pipe, wherein the sealing ring group comprises at least two soft metal sealing rings, and all the soft metal sealing rings form at least two outward deformation ends and at least one inward deformation end; the outward deformation end is provided with an inner conical surface and can be expanded and deformed under extrusion; the hardness of the materials of at least two outward deformation ends is different; the outward deformation end with lower material hardness plays roles of anchoring and sealing, and the outward deformation end with higher material hardness plays roles of righting and sealing; the inward deformation end is provided with an outer conical surface, and can be internally contracted and deformed under extrusion to be attached to the patching liner tube so as to play a sealing role. Therefore, the righting and anchoring of the patching tool and the sealing between the patching tool and the oil well casing are realized, and the metal sealing is adopted, so that the high-temperature and high-pressure resistant performance is good, the sealing is not easy to lose efficacy, and the patching is reliable.
Description
Technical Field
The utility model relates to a sleeve pipe subsidy instrument and metal seal structure thereof.
Background
The average service life of the common casing is about 15-20 years, and the casing can be damaged due to the influences of factors such as high temperature, high pressure, well fluid corrosion and frequent operation. Because of limited well repairing technology and economic benefit, some casing damage wells only have to be shut in or the outer layer is turned to produce, so that the well pattern is imperfect, and the residual recoverable reserves are difficult to use. With the further development of old oil fields, in order to recover injection and production well patterns and improve reserve utilization, low-cost well workover process technology is needed to carry out well workover treatment on casing damage wells to recover normal production.
At present, aiming at the problem of horizontal well casing damage, the solution mainly comprises: (1) adopting overhaul equipment to take and replace the casing of the horizontal well, and recovering the original function of the casing; (2) replacing the current well work by drilling a replacement well; (3) and repairing the damaged casing by adopting an expansion pipe type casing patching tool to recover the production of the oil-water well. However, the three schemes have the problems of long construction time and high cost.
The annular space between the patching liner tube and the casing is provided with a sealing element which is mainly a rubber tube, and the rubber tube is extruded by a hydraulic cylinder to deform and generate radial expansion so as to seal the annular space between the patching liner tube and the casing. For example, the underground high-temperature and high-pressure sealing cylinder disclosed in the chinese patent with the publication number CN206053898U includes a central sleeve, and a rubber cylinder is sleeved outside the central sleeve and is broken outwards by pressure to realize sealing.
However, in the structure adopting the rubber cylinder to be pressed and expanded to realize sealing, the problem of sealing failure caused by the fact that the rubber cylinder is easy to damage still exists because the high temperature resistance and the high pressure resistance of the plastic material are limited. In addition, when the casing patching tool is put into the casing, the casing patching tool is often eccentric relative to the casing, and the casing patching tool is still in an eccentric state after being anchored into the casing, so that the subsequent use of the casing is influenced, and the casing patching tool is easy to cause the above problems to be more prominent particularly for inclined wells or horizontal wells.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a metal sealing structure for an oil well casing patching tool, which solves the problems that the sealing structure used by the existing casing patching has limited high temperature and high pressure resistance and is easy to seal and lose efficacy; an object of the utility model is to provide a sleeve pipe subsidy instrument to it is limited to solve current sleeve pipe subsidy instrument high temperature resistant high pressure resistance, the easy problem of sealing failure.
The utility model discloses a metal seal structure for oil well casing subsidy instrument adopts following technical scheme:
metal seal structure, this metal seal structure is used for oil well casing subsidy instrument, includes:
the sealing ring group is sleeved on the central sleeve and radially deforms under the action of pressure at two axial ends;
the sealing ring group comprises at least two soft metal sealing rings, and the soft metal sealing rings are sequentially sleeved outside the central sleeve along the axial direction;
the axial end parts of all the soft metal sealing rings form at least two outward deformation ends and at least one inward deformation end;
the outward deformation end is provided with an inner conical surface, and the inner conical surface forms a flaring structure and is used for outward flaring deformation of the outward deformation end under the extrusion of the adaptive conical surface;
the inward deformation end is provided with an outer conical surface, and the small-diameter end of the outer conical surface is close to the end surface of the end part of the soft metal sealing ring and used for inward shrinkage deformation of the inward deformation end under the extrusion of the adaptive conical surface;
the hardness of the materials of at least two outward deformation ends is different.
Has the advantages that: all the soft metal sealing rings form at least two outward deformation ends, the material hardness of the at least two outward deformation ends is different, the outward deformation end with lower material hardness has a large binding surface with the oil well casing wall after the inner conical surface of the outward deformation end is extruded and expanded due to the softer material hardness, the center casing is anchored on the oil well casing wall, and the sealing function can be realized; the outward deformation end with higher material hardness has uniform deformation amount after the inner conical surface of the outward deformation end is extruded and expands and deforms due to higher material hardness, and the deformation of the outward deformation end with higher material hardness can generate a centralizing effect on the central sleeve relative to the central sleeve in an eccentric state of the oil well casing pipe, so that the use is reliable and the sealing is facilitated; all the soft metal sealing rings form at least one inward deformation end, and the outer conical surface of the inward deformation end is pressed and contracted inwards to deform and then is attached to the central sleeve to play a role in sealing; the deformation of seal ring group realizes righting, the anchoring of center cover and the sealed between center cover and oil well casing like this, compares with the mode that adopts packing element compression expansion seal among the prior art moreover, adopts metal seal, and high temperature resistant high pressure resistant performance is good, and sealed being difficult to become invalid.
Furthermore, one of the two outward deformation ends is made of brass, and the other is made of red copper.
Has the advantages that: convenient manufacture and good use effect.
Furthermore, the hardness of the material of at least two outward deformation ends is different to form a harder outward deformation end and a softer outward deformation end respectively, and the harder outward deformation end and the softer outward deformation end are both provided with more than two parts.
Has the advantages that: the sealing, anchoring and righting effects are good.
Furthermore, the hardness of the material of at least two inward deformation ends is different to form a harder inward deformation end and a softer inward deformation end respectively, and the harder inward deformation end and the softer inward deformation end are both provided with more than two parts.
Has the advantages that: more than two sealing parts can be formed, and the sealing effect is better.
Furthermore, the sealing ring group comprises a trapezoidal sealing ring, two double-conical-surface sealing rings and two single-conical-surface sealing rings;
the two ends of the trapezoidal sealing ring are both inward deformation ends;
the two ends of the double-conical-surface sealing ring are respectively an inward deformation end and an outward deformation end;
one end of the single-conical-surface sealing ring is an outward deformation end, and the end surface of the other end of the single-conical-surface sealing ring is perpendicular to the axis;
the axial both sides of trapezoidal sealing ring all are equipped with a biconical face sealing ring and a single conical face sealing ring, and the single conical face sealing ring setting of arbitrary side of trapezoidal sealing ring's axial is kept away from one side of trapezoidal sealing ring at the biconical face sealing ring.
Has the advantages that: the single conical surface sealing ring, the double conical surface sealing ring and the trapezoidal sealing ring are in conical surface fit with each other, and multiple sealing is performed to improve the sealing effect.
Furthermore, the trapezoid sealing ring and the single-conical-surface sealing ring are made of red copper, and the double-conical-surface sealing ring is made of brass.
Has the advantages that: the sealing rings made of different materials are arranged in a crossed mode, so that the deformation effect is guaranteed, and the sealing, anchoring and righting effects are improved.
Furthermore, the metal sealing structure further comprises a locking ring, the locking ring is matched with the central sleeve through one-way sliding threads, and the tooth flank angle of one side, close to the sealing ring group, of the one-way sliding threads on the locking ring is larger than the tooth flank angle of one side, far away from the sealing ring group, of the one-way sliding threads, so that the locking ring can move in the direction towards the sealing ring group under the axial acting force and is locked in the direction back to the sealing ring group.
Has the advantages that: the locking ring is matched with the central sleeve through one-way sliding threads and locked in the direction back to the sealing ring group, so that the deformation of the sealing ring group can be kept, and the sealing and anchoring are more stable.
Furthermore, the metal sealing structure also comprises a pressure transmission cylinder which is sleeved on the central sleeve and arranged between the locking ring and the sealing ring group; a shearing pin is arranged between the pressure transmission cylinder and the central sleeve.
Has the advantages that: a pressure transmission cylinder is arranged between the locking ring and the sealing ring group, and is connected to the central sleeve through a shearing pin to limit the axial movement of the pressure transmission cylinder so as to prevent the sealing ring group from being extruded and deformed prematurely in the process of running into the well.
Furthermore, the metal sealing structure further comprises a support ring, the support ring is sleeved on the central sleeve, and the outer diameter of the support ring is not less than that of the soft metal sealing ring adjacent to the support ring.
Has the advantages that: the supporting ring extrudes the adjacent soft metal sealing ring, so that the acting force is uniformly distributed, and the deformation effect is ensured.
The utility model discloses a sleeve pipe subsidy instrument adopts following technical scheme:
casing subsidy instrument includes:
the patching liner tube is used for setting the position to be patched of the casing;
the axial two ends of the patching liner tube are provided with metal sealing structures,
the metal seal structure includes:
the sealing ring group is sleeved on the central sleeve and radially deforms under the action of pressure at two axial ends;
the sealing ring group comprises at least two soft metal sealing rings, and the soft metal sealing rings are sequentially sleeved outside the central sleeve along the axial direction;
the axial end parts of all the soft metal sealing rings form at least two outward deformation ends and at least one inward deformation end;
the outward deformation end is provided with an inner conical surface, and the inner conical surface forms a flaring structure and is used for outward flaring deformation of the outward deformation end under the extrusion of the adaptive conical surface;
the inward deformation end is provided with an outer conical surface, and the small-diameter end of the outer conical surface is close to the end surface of the end part of the soft metal sealing ring and used for inward shrinkage deformation of the inward deformation end under the extrusion of the adaptive conical surface;
the hardness of the materials of at least two outward deformation ends is different.
The corresponding section of the patching liner tube forms a central sleeve for the sealing ring to be sleeved.
Has the advantages that: the axial two ends of the patching liner tube are provided with metal sealing structures, each metal sealing structure comprises at least two soft metal sealing rings, all the soft metal sealing rings form at least two outward deformation ends, and the hardness of the materials of the at least two outward deformation ends is different, wherein the outward deformation end with lower hardness of the material has a large binding surface with the wall of the oil well casing tube after the inner conical surface of the outward deformation end is extruded and expands outwards due to lower hardness of the material, so that the patching liner tube can be anchored on the wall of the oil well casing tube, and can play a role in sealing; the outward deformation end with higher material hardness has uniform deformation after the inner conical surface of the outward deformation end is extruded and expands and deforms due to higher material hardness, and for the patching liner tube which is in an eccentric state relative to the oil well casing tube, the deformation of the outward deformation end with higher material hardness can generate a centralizing effect on the patching liner tube, so that the reliable use is ensured, and the sealing is facilitated; all the soft metal sealing rings form at least one inward deformation end, and the outer conical surface of the inward deformation end is pressed to be subjected to inward shrinkage deformation and then is attached to the patching liner pipe to play a role in sealing; the deformation of the sealing ring group realizes the centralization and anchoring of the subsidy liner tube and the sealing between the subsidy liner tube and the oil well casing, and compared with a casing subsidy tool adopting a rubber cylinder compression expansion sealing mode in the prior art, the subsidy tool adopts metal sealing, has good high temperature and high pressure resistance, is difficult to lose efficacy in sealing and has good subsidy reliability.
Furthermore, one of the two outward deformation ends is made of brass, and the other is made of red copper.
Has the advantages that: convenient manufacture and good use effect.
Furthermore, the hardness of the material of at least two outward deformation ends is different to form a harder outward deformation end and a softer outward deformation end respectively, and the harder outward deformation end and the softer outward deformation end are both provided with more than two parts.
Has the advantages that: the sealing, anchoring and righting effects are good.
Furthermore, the hardness of the material of at least two inward deformation ends is different to form a harder inward deformation end and a softer inward deformation end respectively, and the harder inward deformation end and the softer inward deformation end are both provided with more than two parts.
Has the advantages that: more than two sealing parts can be formed, and the sealing effect is better.
Furthermore, the sealing ring group comprises a trapezoidal sealing ring, two double-conical-surface sealing rings and two single-conical-surface sealing rings;
the two ends of the trapezoidal sealing ring are both inward deformation ends;
the two ends of the double-conical-surface sealing ring are respectively an inward deformation end and an outward deformation end;
one end of the single-conical-surface sealing ring is an outward deformation end, and the end surface of the other end of the single-conical-surface sealing ring is perpendicular to the axis;
the axial both sides of trapezoidal sealing ring all are equipped with a biconical face sealing ring and a single conical face sealing ring, and the single conical face sealing ring setting of arbitrary side of trapezoidal sealing ring's axial is kept away from one side of trapezoidal sealing ring at the biconical face sealing ring.
Has the advantages that: the single conical surface sealing ring, the double conical surface sealing ring and the trapezoidal sealing ring are in conical surface fit with each other, and multiple sealing is performed to improve the sealing effect.
Furthermore, the trapezoid sealing ring and the single-conical-surface sealing ring are made of red copper, and the double-conical-surface sealing ring is made of brass.
Has the advantages that: the sealing rings made of different materials are arranged in a crossed mode, so that the deformation effect is guaranteed, and the sealing, anchoring and righting effects are improved.
Furthermore, the metal sealing structure further comprises a locking ring, the locking ring is matched with the central sleeve through one-way sliding threads, and the tooth flank angle of one side, close to the sealing ring group, of the one-way sliding threads on the locking ring is larger than the tooth flank angle of one side, far away from the sealing ring group, of the one-way sliding threads, so that the locking ring can move in the direction towards the sealing ring group under the axial acting force and is locked in the direction back to the sealing ring group.
Has the advantages that: the locking ring is matched with the central sleeve through one-way sliding threads and locked in the direction back to the sealing ring group, so that the deformation of the sealing ring group can be kept, and the sealing and anchoring are more stable.
Furthermore, the metal sealing structure also comprises a pressure transmission cylinder which is sleeved on the central sleeve and arranged between the locking ring and the sealing ring group; a shearing pin is arranged between the pressure transmission cylinder and the central sleeve.
Has the advantages that: a pressure transmission cylinder is arranged between the locking ring and the sealing ring group, and is connected to the central sleeve through a shearing pin to limit the axial movement of the pressure transmission cylinder so as to prevent the sealing ring group from being extruded and deformed prematurely in the process of running into the well.
Furthermore, the metal sealing structure further comprises a support ring, the support ring is sleeved on the central sleeve, and the outer diameter of the support ring is not less than that of the soft metal sealing ring adjacent to the support ring.
Has the advantages that: the supporting ring extrudes the adjacent soft metal sealing ring, so that the acting force is uniformly distributed, and the deformation effect is ensured.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the casing patch tool of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partial structural schematic view of the metal seal structure of embodiment 2 of the casing patching tool of the present invention;
the names of the components corresponding to the corresponding reference numerals in the drawings are:
1-subsiding a liner tube, 2-locking rings, 3-pressure transmission cylinders, 4-shearing pins, 5-first single-conical-surface sealing rings, 6-first double-conical-surface sealing rings, 7-trapezoidal sealing rings, 8-second double-conical-surface sealing rings, 9-second single-conical-surface sealing rings, 10-support rings and 11-baffle tables.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as the terms first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the recitation of "comprising an … …" may occur without the exclusion of additional like elements present in the process, method, article, or apparatus that comprises the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
The present invention will be described in further detail with reference to examples.
The utility model provides a casing subsidy instrument's embodiment 1:
as shown in fig. 1 and 2, the casing patching tool includes a patching liner 1, and both axial ends of the patching liner 1 are provided with metal sealing structures. The metal sealing structure comprises a supporting ring 10, a sealing ring group, a pressure transmission cylinder 3 and a locking ring 2 which are sequentially sleeved on the patching liner tube. The sealing ring group comprises a first single-conical-surface sealing ring 5, a first double-conical-surface sealing ring 6, a trapezoidal sealing ring 7, a second double-conical-surface sealing ring group 8 and a first single-conical-surface sealing ring 9. The pressure transmission cylinder 3 is connected with the subsidy lining pipe 1 through a shear pin 4.
In order to more clearly describe the present embodiment, the left-right direction in fig. 1 is taken as the left-right direction of the casing patch.
The patching liner tube 1 is provided with a left section, a middle section and a right section, wherein the strength of the left section and the right section is higher than that of the middle section. The left section and the right section are used for forming a central sleeve of a metal sealing structure, and a support ring 10, a sealing ring group, a pressure transmission cylinder 3 and a lock ring 2 are sleeved with the central sleeve. The left section, the middle section and the right section are butted together by welding, and in order to show the whole structure of the bushing patching tool more clearly, part of the line of the middle section is omitted by a cut-off line in fig. 1, and the bushing patching tool actually has a longer length.
The left end and the right end of the subsidy lining pipe 1 are respectively provided with a lock ring 2, a pressure transmission cylinder 3, a shearing pin 4, a first single-conical-surface sealing ring 5, a first double-conical-surface sealing ring 6, a trapezoidal sealing ring 7, a second double-conical-surface sealing ring 8, a second single-conical-surface sealing ring 9, a support ring 10 and a baffle table 11. The left end is taken as an example in the present embodiment for detailed description.
The diameters of the left section and the right section of the patching liner tube 1 are smaller than that of the middle section, and a step structure is formed at the joint of the left section and the right section with the middle section and is used for forming a blocking platform 11.
The support ring 10 is arranged against the abutment 11 with its left end face being a plane perpendicular to the axis. The outer diameter of the support ring 10 is larger than that of the middle section of the patch liner 1, and the outer diameter of the support ring 10 is not smaller than that of the soft metal sealing ring adjacent to the support ring. The support ring 10 is used for generating a gear action force on the sealing ring group when the sealing ring group is under pressure, so that the gear action force is good, and the thickness of the patching liner pipe 1 is not required to be large.
First single conical surface sealing ring 5, first biconical surface sealing ring 6, trapezoidal sealing ring 7, second biconical surface sealing ring group 8 and second single conical surface sealing ring 9 are soft metal sealing ring, and the material of first single conical surface sealing ring 5, trapezoidal sealing ring 7 and second single conical surface sealing ring 9 is red copper, and the material of first biconical surface sealing ring 6 and second biconical surface sealing ring group 8 is brass.
The left and right end faces of the trapezoidal sealing ring 7 are outer conical surfaces. The first single-conical-surface sealing ring 5 and the first double-conical-surface sealing ring 6 are arranged on the left side of the trapezoidal sealing ring 7, and the second double-conical-surface sealing ring group 8 and the second single-conical-surface sealing ring 9 are arranged on the right side of the trapezoidal sealing ring 7. The first and second double-conical sealing rings 6, 8 are closer to the trapezoidal sealing ring 7 than the first and second single-conical sealing rings 5, 9.
The left end face of the first double-conical-surface sealing ring 6 is an outer conical surface, and the right end face of the first double-conical-surface sealing ring is an inner conical surface. The second double-cone sealing ring 8 has the same structure as the first double-cone sealing ring 6 and is symmetrically arranged relative to the trapezoidal sealing ring 7. The right end face of the first double-conical-surface sealing ring 6 is in conical surface fit with the left end face of the sealing ring 7, and the left end face of the second double-conical-surface sealing ring 8 is in conical surface fit with the right end face of the sealing ring 7.
The left end face of the first single-conical-face sealing ring 5 is perpendicular to the axis, the right end face of the first single-conical-face sealing ring 5 is an inner conical face, and the second single-conical-face sealing ring 9 is identical in structure to the first single-conical-face sealing ring 5 and is symmetrically arranged relative to the sealing ring 7. The right end face of the first single-conical-face sealing ring 5 is in conical surface fit with the left end face of the first double-conical-face sealing ring 6, and the left end face of the second single-conical-face sealing ring 9 is in conical surface fit with the right end face of the second double-conical-face sealing ring 8. The second single-conical-surface sealing ring 9 is arranged on the left side of the supporting ring 10, and the pressure transfer cylinder 3 is arranged on the left side of the first single-conical-surface sealing ring 5.
The pressure transmission cylinder 3 is provided with a pin perforation, and the subsidy liner tube 1 is correspondingly provided with a pin perforation so as to connect the shearing pin 4 on the pressure transmission cylinder 3 and the subsidy liner tube 1.
The shearing pin 4 is used for fixing the pressure transmission cylinder 3 on the subsidy lining pipe 1, and prevents the sealing ring group from deforming in advance due to pressure in the process of lowering the metal sealing structure.
The check ring 2 is arranged on the left side of the pressure transmission cylinder 3, the check ring 2 is connected with the patch liner tube 1 through one-way sliding threads, the flank angle of one side, close to the sealing ring group, of one-way sliding threads on the check ring 2 is 60 degrees, the flank angle of one side, far away from the sealing ring group, of the one-way sliding threads is 3 degrees, the check ring 2 can move in the direction towards the sealing ring group under the axial acting force and is locked in the direction back to the sealing ring group, and the one-way sliding threads belong to the prior art and are commonly connected with special threads.
The right end of the first single-conical-surface sealing ring 5, the left end of the second single-conical-surface sealing ring 9, the right end of the first double-conical-surface sealing ring 6 and the left end of the second double-conical-surface sealing ring 8 are outward deformation ends, and are used for outward expansion deformation under the extrusion of the matched conical surfaces.
The left end of the first double-conical-surface sealing ring 6, the left end and the right end of the trapezoidal sealing ring 7 and the right end of the second double-conical-surface sealing ring 8 are inward deformation ends which are used for inward shrinkage deformation under the extrusion of the matched conical surfaces.
The right end of the sleeve patching tool is the same as the metal sealing structure at the left end, and the sleeve patching tool is arranged in a bilateral symmetry mode.
During the use, transfer the sleeve pipe subsidy instrument and transfer the sleeve pipe and wait to subsidy position department, the both sides that the position was waited to subsidy respectively in sleeve pipe subsidy instrument both ends utilize the hydraulic compressor that the both ends of sleeve pipe subsidy instrument are connected to exert pressure to the catch 2 at both ends, promote both sides catch 2 and move in opposite directions, catch 2 exerts pressure to pressure cylinder 3, after pressure increases to a certain degree, press and cut pin 4 absolutely for pressure cylinder 3 extrudees first single conical surface sealing ring 5. The hydraulic compressor is the prior art, also called hydraulic booster, seat seal etc. rely on hydraulic pressure to promote the piston and remove, and then realize power take off.
The first single-conical-surface sealing ring 5 extrudes the first double-conical-surface sealing ring 6, the outward deformation end of the first single-conical-surface sealing ring 5 and the inward deformation end of the first double-conical-surface sealing ring 6 are matched under the action of the conical surfaces, so that the outward deformation end of the first single-conical-surface sealing ring 5 generates radial outward expansion deformation and is attached to the inner wall of the sleeve, and the inward deformation end of the first double-conical-surface sealing ring 6 generates radial inward contraction deformation and is attached to the outer peripheral surface of the subsidy liner pipe 1.
The first biconical surface sealing ring 6 extrudes the sealing ring 7, the outward deformation end of the first biconical surface sealing ring 6 and the corresponding side inward deformation end of the sealing ring 7 are under the conical surface cooperation effect, so that the outward deformation end of the first biconical surface sealing ring 6 generates radial outward expansion deformation and is attached to the inner wall of the sleeve, and the corresponding side inward deformation end of the sealing ring 7 generates radial inward contraction deformation and is attached to the outer peripheral surface of the subsidy liner pipe 1.
The sealing ring 7 extrudes the second double-conical-surface sealing ring 8, the outward deformation end of the second double-conical-surface sealing ring 8 and the corresponding side inward deformation end of the sealing ring 7 are under the conical surface matching action, so that the outward deformation end of the second double-conical-surface sealing ring 8 generates radial outward expansion deformation and is attached to the inner wall of the sleeve, and the corresponding side inward deformation end of the sealing ring 7 generates radial inward shrinkage deformation and is attached to the outer peripheral surface of the subsidy liner pipe 1.
The second double-conical-surface sealing ring 8 extrudes the second single-conical-surface sealing ring 9, the inward deformation end of the second double-conical-surface sealing ring 8 and the outward deformation end of the second single-conical-surface sealing ring 9 are matched under the action of the conical surfaces, so that the inward deformation end of the second double-conical-surface sealing ring 8 generates radial inward shrinkage deformation and is attached to the outer peripheral surface of the subsidy liner pipe 1, and the outward deformation end of the second single-conical-surface sealing ring 9 generates radial outward expansion deformation and is attached to the inner wall of the sleeve.
The second single-conical-surface sealing ring 9 presses the supporting ring 10, and the supporting ring 10 presses a counterforce on the sealing ring group under the action of the baffle table 11, so that the sealing ring group is pressed and deformed. The locking ring 2 is in stop-fit engagement with the patch liner 1 in the leftward direction to maintain the amount of deformation of the seal ring set.
The outward deformation end of the first single-conical-surface sealing ring 5 and the outward deformation end of the second single-conical-surface sealing ring 9 have large binding surfaces with the oil well casing wall after being extruded and expanded due to small material hardness, so that the subsidy liner pipe 1 can be anchored on the oil well casing wall, and meanwhile, the sealing effect can be achieved; the outward deformation ends of the first double-conical-surface sealing ring 6 and the second double-conical-surface sealing ring 8 are uniform in deformation amount after being extruded and deformed due to high hardness of materials, so that the correction effect on the subsidy liner tube 1 can be realized, the use reliability is ensured, and the sealing is facilitated; the first double-conical-surface sealing ring 6 and the second double-conical-surface sealing ring 8 are pressed and deformed inwards, and then are attached to the patching liner pipe 1 to play a sealing role. Therefore, the casing patching tool is sealed and anchored at a corresponding position, and casing patching repair is realized.
The utility model provides a casing subsidy instrument's embodiment 2:
as shown in fig. 3, the present embodiment is different from embodiment 1 in that the sealing ring set in embodiment 1 includes two brass sleeves, two red copper sleeves and one trapezoid sealing ring, and in this embodiment, the sealing ring set includes a single-cone sealing ring 5, a double-cone sealing ring 6 and a supporting ring 10a, and an end surface of the supporting ring 10a adjacent to the double-cone sealing ring 6 is an external cone surface for forming a conical surface fit with an internal cone surface of the double-cone sealing ring 6.
The utility model provides a casing pipe subsidy instrument's embodiment 3, this embodiment and embodiment 1's difference lie in, and the trapezoidal sealing ring in embodiment 1 is the red copper material, and in this embodiment, the trapezoidal sealing ring is made by ordinary steel.
The utility model provides a sleeve pipe subsidy instrument's embodiment 4, this embodiment and embodiment 1's difference lie in, the material of first single conical surface sealing ring, trapezoidal sealing ring and the single conical surface sealing ring of second in the embodiment 1 is red copper, and the material of first biconical surface sealing ring and the single conical surface sealing ring group of second is brass, and in this embodiment, the material of first single conical surface sealing ring, trapezoidal sealing ring and the single conical surface sealing ring of second is brass, and the material of first biconical surface sealing ring and the single conical surface sealing ring group of second is red copper.
The utility model provides an embodiment 5 of sleeve pipe subsidy instrument, this embodiment and embodiment 1's difference lie in, the sealing ring group in embodiment 1 with keep off and be equipped with the support ring between the platform, and in this embodiment, do not establish the support ring, sealing ring group is direct with keep off the platform contact, directly organize the production to sealing ring by keeping off the platform and keep off a position effort.
The utility model discloses well metal seal structure's embodiment:
the metal seal structure described in the embodiment of the metal seal structure, that is, any one of embodiments 1 to 5 of the casing repair tool described above, will not be described in detail here.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Metal seal structure, this metal seal structure is used for oil well casing subsidy instrument, includes:
the sealing ring group is sleeved on the central sleeve and radially deforms under the action of pressure at two axial ends;
it is characterized in that the preparation method is characterized in that,
the sealing ring group comprises at least two soft metal sealing rings, and the soft metal sealing rings are sequentially sleeved outside the central sleeve along the axial direction;
the axial end parts of all the soft metal sealing rings form at least two outward deformation ends and at least one inward deformation end;
the outward deformation end is provided with an inner conical surface, and the inner conical surface forms a flaring structure and is used for outward flaring deformation of the outward deformation end under the extrusion of the adaptive conical surface;
the inward deformation end is provided with an outer conical surface, and the small-diameter end of the outer conical surface is close to the end surface of the end part of the soft metal sealing ring and used for inward shrinkage deformation of the inward deformation end under the extrusion of the adaptive conical surface;
the hardness of the materials of at least two outward deformation ends is different.
2. The metal seal structure of claim 1, wherein: one of the two outward deformation ends is made of brass, and the other is made of red copper.
3. The metal seal structure according to claim 1 or 2, characterized in that: the hardness of the material of at least two outward deformation ends is different, so that a harder outward deformation end and a softer outward deformation end are respectively formed, and the harder outward deformation end and the softer outward deformation end are respectively provided with more than two parts.
4. The metal seal structure according to claim 1 or 2, characterized in that: the hardness of the materials of at least two inward deformation ends is different, so that a harder inward deformation end and a softer inward deformation end are respectively formed, and the harder inward deformation end and the softer inward deformation end are respectively provided with more than two parts.
5. A metal seal according to claim 1 or 2, wherein: the sealing ring group comprises a trapezoidal sealing ring, two double-conical-surface sealing rings and two single-conical-surface sealing rings;
the two ends of the trapezoidal sealing ring are both inward deformation ends;
the two ends of the double-conical-surface sealing ring are respectively an inward deformation end and an outward deformation end;
one end of the single-conical-surface sealing ring is an outward deformation end, and the end surface of the other end of the single-conical-surface sealing ring is perpendicular to the axis;
the axial both sides of trapezoidal sealing ring all are equipped with a biconical face sealing ring and a single conical face sealing ring, and the single conical face sealing ring setting of arbitrary side of trapezoidal sealing ring's axial is kept away from one side of trapezoidal sealing ring at the biconical face sealing ring.
6. The metal seal structure of claim 5, wherein: the trapezoidal sealing ring and the single-conical-surface sealing ring are made of red copper, and the double-conical-surface sealing ring is made of brass.
7. The metal seal structure according to claim 1 or 2, characterized in that: the metal sealing structure further comprises a locking ring, the locking ring is matched with the central sleeve through one-way sliding threads, and the tooth side angle of one side, close to the sealing ring group, of the one-way sliding threads on the locking ring is larger than that of one side, far away from the sealing ring group, of the one-way sliding threads, so that the locking ring can move in the direction towards the sealing ring group under the axial acting force and is locked in the direction back to the sealing ring group.
8. The metal seal structure of claim 7, wherein: the metal sealing structure also comprises a pressure transmission cylinder, wherein the pressure transmission cylinder is sleeved on the central sleeve and is arranged between the locking ring and the sealing ring group;
a shearing pin is arranged between the pressure transmission cylinder and the central sleeve.
9. The metal seal structure according to claim 1 or 2, characterized in that: the metal sealing structure further comprises a support ring, the support ring is sleeved on the central sleeve, and the outer diameter of the support ring is not smaller than that of the soft metal sealing ring adjacent to the support ring.
10. Casing subsidy instrument, its characterized in that includes:
the patching liner tube is used for setting the position to be patched of the casing;
the axial two ends of the subsidy lining pipe are provided with metal sealing structures, and the metal sealing structures are the metal sealing structures in any claim from 1 to 9;
the corresponding section of the patching liner tube forms a central sleeve for the sealing ring to be sleeved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020545282.4U CN212535596U (en) | 2020-04-14 | 2020-04-14 | Casing patching tool and metal sealing structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020545282.4U CN212535596U (en) | 2020-04-14 | 2020-04-14 | Casing patching tool and metal sealing structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212535596U true CN212535596U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020545282.4U Active CN212535596U (en) | 2020-04-14 | 2020-04-14 | Casing patching tool and metal sealing structure thereof |
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| Country | Link |
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| CN (1) | CN212535596U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217432A (en) * | 2022-05-31 | 2022-10-21 | 中国石油化工股份有限公司 | Long well section subsidy reinforcing apparatus |
-
2020
- 2020-04-14 CN CN202020545282.4U patent/CN212535596U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217432A (en) * | 2022-05-31 | 2022-10-21 | 中国石油化工股份有限公司 | Long well section subsidy reinforcing apparatus |
| CN115217432B (en) * | 2022-05-31 | 2024-05-17 | 中国石油化工股份有限公司 | Reinforcing apparatus is mended to long well section |
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