CN113236147B - Titanium alloy threaded oil pipe joint of oil and gas well and use method thereof - Google Patents
Titanium alloy threaded oil pipe joint of oil and gas well and use method thereof Download PDFInfo
- Publication number
- CN113236147B CN113236147B CN202110663891.9A CN202110663891A CN113236147B CN 113236147 B CN113236147 B CN 113236147B CN 202110663891 A CN202110663891 A CN 202110663891A CN 113236147 B CN113236147 B CN 113236147B
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- assembly
- wheel
- joint
- copper ring
- rod
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 84
- 238000007789 sealing Methods 0.000 claims abstract description 72
- 230000000694 effects Effects 0.000 claims abstract description 20
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 14
- 238000005056 compaction Methods 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005381 potential energy Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 3
- 229930195733 hydrocarbon Natural products 0.000 claims 3
- 150000002430 hydrocarbons Chemical class 0.000 claims 3
- 238000001125 extrusion Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
Abstract
The application discloses an oil gas well titanium alloy threaded oil pipe joint, which comprises a joint body, an oil pipe end head and a second sealing assembly; the second sealing component is positioned in the joint body and is used for improving the sealing effect; the second sealing component comprises a soft copper ring, a copper ring mounting groove and an annular plate spring; the soft copper ring is made of copper or copper alloy, the main body is annular, and the soft copper ring is positioned in the copper ring positioning groove; the copper ring mounting groove is arranged on the inner wall of the joint body, is positioned at the thread end point of the female thread in the space position, and is essentially an annular gap formed between the joint body and the oil pipe end after assembly; the annular plate spring is positioned on the copper ring positioning groove and abuts against the soft copper ring, and the main body is a ring with a notch.
Description
Technical Field
The invention relates to the technical field of mining equipment, in particular to a titanium alloy threaded oil pipe joint of an oil and gas well and a use method thereof.
Background
Tubing strings are one of the key tubing tools used in large quantities in the production of oil and gas, and are the passages connecting the formation to the surface. The threaded joint is used as a connecting part of an oil pipe and is used for bearing complex loads such as stretching, compression, bending, internal pressure, external pressure, vibration and the like with a pipe column in the pit for a long time. The threaded joint is actually the weakest part of the tubing.
The existing special threaded joint is characterized in that the male joint and the female joint are provided with conical surfaces and spherical surfaces, the spherical surface of the male joint is matched with the conical surface of the female joint, and meanwhile, the spherical surface of the female joint is matched with the conical surface of the male joint; the structure has two sealing surfaces when being frequently subjected to loads such as stretching, compression, bending and the like, and the sealing failure is easy to occur.
Disclosure of Invention
According to the oil-gas well titanium alloy threaded oil pipe joint, the technical problem that sealing failure occurs easily when the oil-gas well titanium alloy threaded oil pipe joint is frequently subjected to loads such as stretching, compression and bending in the prior art is solved, and the technical effect that the probability of sealing failure of the oil-gas well titanium alloy threaded oil pipe joint is small is achieved.
The embodiment of the application provides a titanium alloy threaded oil pipe joint of an oil and gas well, which comprises a joint body, an oil pipe end and a second sealing assembly;
the second sealing component is positioned in the joint body and is used for improving the sealing effect;
the second sealing component comprises a soft copper ring, a copper ring mounting groove and an annular plate spring;
the soft copper ring is made of copper or copper alloy, the main body is annular, and the soft copper ring is positioned in the copper ring positioning groove;
the copper ring mounting groove is arranged on the inner wall of the joint body, is positioned at the thread end point of the female thread in the space position, and is essentially an annular gap formed between the joint body and the oil pipe end after assembly;
the annular plate spring is positioned on the copper ring mounting groove and abuts against the soft copper ring, the main body is a ring with a notch, the deformation range of the soft copper ring is limited when the joint is screwed up, the soft copper ring is enabled to fill the copper ring mounting groove, the sealing effect is further improved, and the effect that self elastic potential energy is released to the soft copper ring when the oil gas well titanium alloy threaded oil pipe joint is subjected to stretching or bending load is achieved, so that the soft copper ring is always attached to the joint body and the oil pipe end.
A third seal assembly;
the third sealing assembly comprises an annular bin body, an inlet, an outlet, an inlet and outlet sealing assembly and a rubber injection assembly;
the annular bin body is an annular groove and is arranged on the inner wall of the joint body, the spatial position of the annular bin body is positioned on the joint body and is close to the female joint sealing surface, and after the joint body is in threaded connection with the oil pipe joint, the annular bin body becomes a closed bin body;
the inlet and the outlet are positioned on the joint body, communicated with the annular bin body and used for feeding and discharging raw materials used for pouring the sealing ring;
the entrance closing component is used for closing the entrance and the output opening;
the rubber injection assembly plays a role in heating raw materials used for pouring the sealing ring and injecting the raw materials into the through hole.
Preferably, the device further comprises a copper ring compacting assembly;
the connector body further comprises a positioning hole, a passing port and a plug body;
the positioning hole is arranged on the inner wall of the joint body, is the same as the axial direction of the passing port and is used for positioning the copper ring compression assembly;
the passing port penetrates through the joint body and is a through hole, and the axial direction of the passing port is perpendicular to the axial direction of the joint body and is used for passing the copper ring compression assembly;
the plug body is used for plugging the passing port;
the copper ring compacting assembly comprises a central rotating rod, a rotating rod positioning assembly, a compacting wheel sliding assembly, a compacting wheel rotating assembly and a control unit;
the central rotating rod is in a rod shape and is used for supporting and positioning the compacting wheel assembly, the compacting wheel sliding assembly and the compacting wheel rotating assembly and driving the compacting wheel sliding assembly and the compacting wheel rotating assembly to operate;
the rotating rod positioning assembly is matched with the positioning hole to fixedly connect the central rotating rod on the joint body in a rotating way;
the compaction wheel assembly is in direct contact with the inner wall of the joint body and is used for extruding the annular plate spring under the driving of the compaction wheel sliding assembly and the compaction wheel rotating assembly.
The connector body is hollow and cylindrical, a female thread and a female sealing surface are arranged on the connector body, and the connector body is a foundation for processing the female thread and the female sealing surface;
the oil pipe end is a foundation for processing the male thread and the male sealing surface;
the female thread is in threaded connection with the male thread to play a role in connecting the joint body and the oil pipe end;
the female sealing surface and the male sealing surface are in interference fit when the female thread and the male thread are connected to the thread end position in a threaded manner;
the female sealing surface comprises a female spherical surface and a female conical surface; the male sealing surface comprises a male spherical surface and a male conical surface.
Preferably, the central rotating rod comprises a threaded part, a polished rod part and a threaded rod rotation driving assembly;
the polish rod part is positioned at two ends of the central rotating rod, the thread part is positioned at the middle position of the central rotating rod, and the thread part is used for driving the compaction wheel sliding assembly and the compaction wheel rotating assembly to operate;
the threaded rod rotation driving assembly is positioned at one end of the central rotating rod and used for driving the central rotating rod to rotate;
when in actual use, a polish rod part far away from one end of the threaded rod rotation driving assembly is inserted into the positioning hole;
the rotating rod positioning assembly plays a role in positioning the central rotating rod.
Preferably the compactor wheel assembly comprises a wheel body and a wheel body support assembly;
the wheel body is spherical, the number of the wheel bodies is 4, and the balls are connected to the wheel body supporting assembly;
the wheel body supporting component comprises a supporting plate, a wheel body positioning rod, a torsion spring, a rotation limiting component and a positioning rod pulling component;
the support plates are plate-shaped, are symmetrically arranged and are used for supporting the wheel body positioning rods, and the number of the wheel body positioning rods is 4 and is used for supporting and positioning the wheel body;
the two wheel bodies, the two wheel body positioning rods and one supporting plate are in one group, two groups are divided, and the two groups are symmetrically arranged by taking the central rotating rod as an axis;
one end of the wheel body positioning rod is positioned with a wheel body, the other end of the wheel body positioning rod is rotatably and fixedly connected with one end of the supporting plate, and the connecting part is positioned with the torsion spring; the other wheel body locating rod of the group is located at the other end of the supporting plate; the rotation limiting component is plate-shaped and is positioned at two ends of the supporting plate, which are close to the wheel body positioning rod, and is used for limiting the rotation angle of the wheel body positioning rod during running.
The preferred locating rod pulling assembly comprises a pulling rope, a pulling rope retraction assembly and a retraction assembly shell, and is used for pulling the wheel body locating rod to force the wheel body to always abut against the inner wall of the joint body;
the rolling assembly shell is positioned on the compacting wheel rotating assembly and is used for bearing and positioning the pulling rope rolling assembly, the number of the pulling ropes is 4, the uniform ends of the pulling ropes are fixed on the wheel body positioning rod, and the other ends of the pulling ropes are wound and positioned on the pulling rope rolling assembly;
the pulling rope winding and unwinding component is a winding mechanism.
The annular plate spring is characterized by further comprising a plate spring anti-slip component, wherein the plate spring anti-slip component is positioned on the annular plate spring and is a pit, a protrusion, a groove or a hole densely distributed on the annular plate spring, and the effect of being convenient for the annular plate spring to tightly fit with the soft copper ring is achieved.
The preferred material of the oil-gas well threaded oil pipe joint is titanium alloy.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
the second sealing component is additionally arranged on the basis of the titanium alloy threaded oil pipe joint of the oil gas well in the prior art, is positioned inside the joint and comprises a soft copper ring and an annular plate spring which are matched, the sealing effect is improved by utilizing extrusion deformation of the soft copper ring, and the occurrence of the sealing failure phenomenon is further avoided; the technical problem that the sealing failure phenomenon easily occurs when the oil-gas well titanium alloy threaded oil pipe joint is frequently subjected to loads such as stretching, compression and bending in the prior art is effectively solved, and the technical effect that the probability of the sealing failure of the oil-gas well titanium alloy threaded oil pipe joint is small is achieved.
Drawings
FIG. 1 is a cross-sectional view of a titanium alloy threaded oil pipe joint for an oil and gas well according to the present invention;
FIG. 2 is a schematic diagram of the internal structure of the titanium alloy threaded oil pipe joint of the oil and gas well;
FIG. 3 is a schematic view of the external appearance structure of the titanium alloy threaded oil pipe joint of the oil-gas well;
FIG. 4 is a schematic view of the structure of the oil pipe end of the titanium alloy threaded oil pipe joint for an oil and gas well;
FIG. 5 is a schematic view of the structure of the annular leaf spring of the titanium alloy threaded oil pipe joint for an oil and gas well of the present invention;
FIG. 6 is a schematic diagram of the copper ring compression assembly of the titanium alloy threaded oil pipe joint of the oil and gas well of the present invention;
FIG. 7 is a front view of a copper ring compression assembly of the titanium alloy threaded oil pipe joint of the oil and gas well of the present invention;
FIG. 8 is a schematic diagram of a locating rod pulling assembly of a titanium alloy threaded oil pipe joint for an oil and gas well according to the present invention;
FIG. 9 is a schematic diagram of the force-assisted assembly of the titanium alloy threaded tubing joint of the oil and gas well of the present invention;
in the figure:
joint body 100, female thread 110, female sealing surface 120, locating hole 130, pass-through port 140, plug body 150,
Tubing end 200, pin thread 210, pin seal surface 220,
A second seal assembly 300, a soft copper ring 310, a copper ring mounting groove 320, a ring-shaped plate spring 330, a plate spring anti-slip assembly 340,
A third seal assembly 400, an annular cartridge 410, an access port 420, an output port 430, an access closure assembly 440, an,
Copper ring compression assembly 500,
A central rotation rod 510, a screw thread portion 511, a polish rod portion 512, a screw rod rotation driving assembly 513,
A rotating rod positioning component 520, an arc 521,
Compacting wheel assembly 530, wheel body 531, wheel body support assembly 532, support plate 533, wheel body positioning rod 534, torsion spring 535, positioning rod pull assembly 536, pull cord 537, pull cord retraction assembly 538, retraction assembly housing 539,
A compacting wheel slide assembly 540, a rotating block 541, a slide block 542, a support rod 543, a connecting plate 544,
The compacting wheel rotating assembly 550, the central sliding block 551, the force application rod 552, the folding rod 553, the telescopic rotating body 554, the force borrowing assembly 555 and the telescopic driving assembly 556;
description of the embodiments
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings; the preferred embodiments of the present invention are illustrated in the drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.
It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are used herein for illustrative purposes only and do not represent the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to FIG. 1, a cross-sectional view of a titanium alloy threaded tubing joint for oil and gas wells according to the present invention; the titanium alloy threaded oil pipe joint for the oil and gas well comprises a joint body 100, an oil pipe end head 200 and a second sealing assembly 300; this application adds second seal assembly 300 through on the basis of the oil gas well titanium alloy screw thread oil pipe joint of prior art, and second seal assembly 300 location is inside joint body 100, including soft copper ring 310 and annular leaf spring 330 cooperation, utilizes soft copper ring 310's extrusion deformation to improve sealed effect, further the emergence of avoiding sealed inefficacy phenomenon.
Examples
As shown in fig. 1, the titanium alloy threaded oil pipe joint for oil and gas wells of the present application comprises a joint body 100, an oil pipe end 200 and a second seal assembly 300;
as shown in fig. 2 and 3, the joint body 100 is hollow and cylindrical, and is provided with a female thread 110 and a female sealing surface 120, and the joint body 100 is a foundation for processing the female thread 110 and the female sealing surface 120; as shown in fig. 4, the oil pipe end 200 is the basis for machining the pin thread 210 and the pin sealing surface 220; the female thread 110 is in threaded connection with the male thread 210, and plays a role in connecting the joint body 100 with the oil pipe end 200; the box seal surface 120 and the pin seal surface 220 are in interference fit when the box threads 110 and the pin threads 210 are threadedly connected to thread end positions; the female sealing surface 120 comprises a female spherical surface and a female conical surface; the male sealing surface 220 comprises a male spherical surface and a male conical surface; for the prior art, a detailed description is omitted here.
Preferably, the titanium alloy threaded oil pipe joint of the oil-gas well is made of titanium alloy.
The second sealing assembly 300 is positioned inside the joint body 100 to improve sealing effect; further, the second sealing assembly 300 includes a soft copper ring 310, a copper ring seating groove 320, and a ring-shaped plate spring 330; the soft copper ring is made of copper or copper alloy, the main body is annular, and the soft copper ring is positioned in the copper ring positioning groove 320; the copper ring mounting groove 320 is disposed on the inner wall of the joint body 100, and is located at the thread end point of the female thread 110 in a space position, as shown in fig. 1, the copper ring mounting groove 320 is essentially an annular gap formed between the joint body 100 and the oil pipe end 200 after assembly; the annular plate spring 33 is positioned on the copper ring positioning groove 320, abuts against the soft copper ring 310, and is mainly provided with a ring with a notch, so that the deformation range of the soft copper ring 310 is limited when the joint is screwed up, the soft copper ring 310 is enabled to fill the copper ring positioning groove 320, the sealing effect is further improved, and the effect that when the oil-gas well titanium alloy threaded oil pipe joint is subjected to tensile or bending load, the elastic potential energy is released to apply pressure to the soft copper ring 310, so that the soft copper ring 310 is always forced to be attached to the joint body 100 and the oil pipe end 200 is achieved.
Preferably, as shown in fig. 5, the annular leaf spring 330 further includes a leaf spring anti-slip assembly 340, and the leaf spring anti-slip assembly 340 is positioned on the annular leaf spring 330, and is a pit, a protrusion, a groove or a hole densely distributed on the annular leaf spring 330, which plays a role in facilitating the annular leaf spring 330 to closely fit the soft copper ring 310.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the technical problem that the sealing failure phenomenon easily occurs when the oil-gas well titanium alloy threaded oil pipe joint is frequently subjected to loads such as stretching, compression and bending in the prior art is solved, and the technical effect that the sealing failure probability of the oil-gas well titanium alloy threaded oil pipe joint is small is achieved.
Examples
In order to further increase the sealing effect and reduce the sealing failure probability, the third sealing assembly 400 is additionally arranged on the basis of the embodiment, a sealing ring is cast inside the joint body 100 in a field injection molding mode, and the cast sealing ring is attached to the joint body 100 and an oil pipe joint by utilizing the thermal expansion and contraction characteristics of rubber so as to achieve the sealing effect.
Further, as shown in fig. 1 and 2, the third sealing assembly 400 includes an annular chamber 410, an inlet 420, an outlet 430, an inlet closing assembly 440, and a rubber injection assembly;
the annular bin 410 is an annular groove, is arranged on the inner wall of the joint body 100, is positioned on the joint body 100 at a position close to the female joint sealing surface 120 in a space position, and becomes a closed bin after the joint body 100 and the oil pipe end 200 are in threaded connection; the inlet 420 and the outlet 430 are positioned on the joint body 100, and are communicated with the annular bin 410, and are used for feeding and discharging raw materials for pouring sealing rings; the inlet and outlet closing assembly 440 is used for closing the inlet 420 and the outlet 430, and the structure is preferably a plug; the rubber injection assembly serves to heat and inject the raw materials used to cast the gasket into the inlet 420.
Examples
It was found in the experiment that when the annular plate spring 330 in the first embodiment binds the deformation of the soft copper ring 310, the annular plate spring 330 may be distorted and misplaced due to the extrusion force of the soft copper ring 310 to the annular plate spring 330 (the notch on the annular plate spring 330 may be distorted or misplaced due to the fact that the annular plate spring 330 is continuously subjected to the extrusion force after the extrusion is closed), so as to affect the effective sealing; in order to solve the above problems, the embodiment of the present application reforms the structure of the joint body 100 based on the above embodiment, and applies pressure on the annular plate spring 330 by using the copper ring pressing assembly 500, and forces the soft copper ring 310 to further fill the copper ring mounting groove 320 while rolling the annular plate spring 330, thereby improving the sealing effect and reducing the sealing failure probability;
the method comprises the following steps: the connector body 100 further includes a positioning hole 130, a passing port 140 and a plug body 150; the positioning hole 130 is disposed on the inner wall of the joint body 100, and is the same as the axial direction of the passing hole 140, and is used for positioning the copper ring pressing assembly 500; the passing opening 140 penetrates through the joint body 100 and is a through hole, and the axial direction of the passing opening is perpendicular to the axial direction of the joint body 100, so that the copper ring pressing assembly 500 can pass through the passing opening; the plug body 150 is used for plugging the passage 140.
As shown in fig. 6 to 9, the copper ring pressing assembly 500 includes a center rotation rod 510, a rotation rod positioning assembly 520, a compaction wheel assembly 530, a compaction wheel sliding assembly 540, a compaction wheel rotation assembly 550, and a control unit; the center rotating rod 510 is in a rod shape and is used for supporting and positioning the compacting wheel assembly 530, the compacting wheel sliding assembly 540 and the compacting wheel rotating assembly 550 and driving the compacting wheel sliding assembly 540 and the compacting wheel rotating assembly 550 to operate; the rotating rod positioning assembly 520 is matched with the positioning hole 130 to rotationally and fixedly connect the central rotating rod 510 to the joint body 100; the compacting wheel assembly 530 is in direct contact with the inner wall of the joint body 100 for pressing the annular leaf spring 330 under the driving of the compacting wheel sliding assembly 540 and the compacting wheel rotating assembly 550;
further, as shown in fig. 6, the central rotation rod 510 includes a threaded portion 511, a polish rod portion 512, and a threaded rod rotation driving assembly 513; the polish rod portion 512 is located at two ends of the central rotation rod 510, the screw thread portion 511 is located at a middle position of the central rotation rod 510, and the screw thread portion 511 is used for driving the compacting wheel sliding assembly 540 and the compacting wheel rotating assembly 550 to operate; the threaded rod rotation driving assembly 513 is positioned at one end of the central rotation rod 510, and is used for driving the central rotation rod 510 to rotate, and the structure of the threaded rod rotation driving assembly can be a rotation handle, a motor and the like; in use, the polish rod portion 512 at one end of the rotation driving assembly 513 is inserted into the positioning hole 130.
The rotating rod positioning assembly 520 serves to position the center rotating rod 510; preferably, the rotating rod positioning assembly 520 includes an arcuate plate 521; the arc plate 521 can be attached to the joint body 100, and the central rotating rod 510 penetrates through the arc plate 521 and is rotatably and fixedly connected to the arc plate 521;
the compacting wheel assembly 530 includes a wheel body 531 and a wheel body support assembly 532; the wheel body 531 is preferably spherical, 4 in number, and is ball-jointed to the wheel body support assembly 532; the wheel body support assembly 532 includes a support plate 533, a wheel body positioning lever 534, a torsion spring 535, a rotation limiting assembly, and a positioning lever pull assembly 536; the number of the supporting plates 533 is two, and the supporting plates are symmetrically arranged and are used for supporting the wheel body positioning rods 534, the number of the wheel body positioning rods 534 is 4, and the wheel body positioning rods are used for supporting and positioning the wheel body 531; the two wheel bodies 531, the two wheel body positioning rods 534 and the one supporting plate 533 are one group, two groups are two groups, and the two groups are symmetrically arranged by taking the central rotating rod 510 as an axis; one end of the wheel body positioning rod 534 is positioned with a wheel body 531, the other end is rotatably and fixedly connected with one end of the supporting plate 533, and the connecting part is positioned with the torsion spring 535; the other wheel body positioning rod 534 of the set is positioned at the other end of the support plate 533; the rotation limiting component is plate-shaped, is positioned at two ends of the supporting plate 533 close to the wheel body positioning rod 534, and is used for limiting the rotation angle of the wheel body positioning rod 534 during running;
as shown in fig. 7 and 8, the positioning rod pulling assembly 536 includes a pulling rope 537, a pulling rope retraction assembly 538 and a retraction assembly housing 539 for pulling the wheel body positioning rod 534 to force the wheel body 531 to always abut against the inner wall of the joint body 100; the retraction assembly housing 539 is positioned on the compacting wheel rotation assembly 550 and is used for bearing and positioning the pulling rope retraction assembly 538, the number of the pulling ropes 537 is 4, the uniform end is fixed on the wheel body positioning rod 534, and the other end is wound and positioned on the pulling rope retraction assembly 538; the pulling rope winding and unwinding component 538 is a winding mechanism;
the compacting roller slide assembly 540 is used for driving the wheel 531 to slide along the axial direction of the joint body 100; further, the compacting roller slide assembly 540 includes a rotating block 541, a sliding block 542, a support rod 543, and a connecting plate 544; the rotating block 541 is rotatably and fixedly connected to the polish rod portion 512 remote from the threaded rod rotation driving assembly 513; the sliding block 542 is slidably positioned on the threaded portion 511, and includes a block body, a threaded pipe body, and a pipe body locking assembly; the threaded pipe body is a pipe with threads on the inside, and the pipe is matched with the threaded part 511; the threaded pipe body is rotatably and fixedly connected to the block body; the pipe body fixing and locking assembly is used for locking the relative movement between the threaded pipe body and the block body, and the structure is preferably a pin, a telescopic rod and the like; the connecting plate 544 is plate-shaped; the number of the supporting rods 543 is 4, 2 are in a group, two groups are symmetrically arranged, and two groups in the same group are symmetrically arranged; one end of one supporting rod 543 in the same group is rotatably and fixedly connected to the rotating block 541, the other end is rotatably and fixedly connected to the connecting plate 544, one end of the other supporting rod 543 in the same group is rotatably and fixedly connected to the sliding block 542, and the other end is rotatably and fixedly connected to the connecting plate 544; the rotating block 541 further includes a limiting component, where the limiting component is used to limit the rotation of the supporting rod 543; the supporting plate is rotatably and fixedly connected to the connecting plate 544;
the compactor wheel rotation assembly 550 is configured to drive the compactor wheel assembly 530 to rotate about the axis of the adapter body 100;
preferably, the compacting wheel rotating assembly 550 is configured as a motor;
preferably, as shown in fig. 6 and 9, the compacting wheel rotation assembly 550 includes a central slide 551, a force applying rod 552, a folding rod 553, a telescopic rotor 554, a force applying assembly 555, and a telescopic drive assembly 556; the central sliding block 551 is slidably positioned on the threaded portion 511, and is located between the rotating block 541 and the sliding block 542; the force application rod 552 is fixed on the support plate 533 and is rotatably and fixedly connected to the connection plate 544; the folding rod 553 plays a role of transmitting power, and is a combination of 4 rod bodies, one end of the combined rod body is positioned on the force application rod 552, and the other end is positioned on the telescopic rotating body 554; the telescopic rotating body 554 is of a telescopic rod structure and can be rotationally and fixedly connected to the central sliding block 551; the telescopic driving assembly 556 is used for driving the telescopic rotating body 554 to stretch; the force-borrowing assembly 555 is of a worm gear structure and is positioned at one end of the telescopic rotating body 554, which is close to the threaded part 511; for transmitting the rotational motion of the central rotational shaft 510 to the compactor wheel assembly 530.
The control unit is used for controlling the operation of the pipe body locking assembly and the telescopic driving assembly 556, which are of the prior art and are not described herein.
When the threaded oil pipe joint for the oil and gas well is actually used, the joint body 100 is firstly installed on the oil pipe end 200 and is screwed up; then opening the plug body 150, and filling the copper ring pressing assembly 500 into the joint body 100 through the passing port 140; after which the center rotating lever 510 is driven to rotate by the screw rotation driving assembly; when the central rotating rod 510 rotates, the pipe body locking assembly is in an operating state, the sliding block 542 slides along with the rotation of the central rotating rod 510, and the compacting wheel assembly gradually slides towards the annular plate spring 330 until the compacting wheel assembly abuts against the annular plate spring 330 (at the moment, the limiting assembly operates, and the pipe body locking assembly stops operating); the positioning rod pulling assembly 536 is always in operation during rotation of the central rotation rod 510; thereafter, the telescopic driving assembly is controlled to operate by the control unit, and the compacting wheel assembly 530 is driven to rotate 180 degrees or more around the axis of the joint body 100 by means of the contact between the force assembly and the central rotating rod (excessive pulling rope 537 is not needed to be wound); finally, the copper ring compression assembly 500 is taken out from the passage 140 and the passage 140 is closed.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. 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 (6)
1. The titanium alloy threaded oil pipe joint of the oil and gas well comprises a joint body and an oil pipe end, and is characterized by further comprising a second sealing assembly;
the second sealing component is positioned in the joint body and is used for improving the sealing effect;
the second sealing component comprises a soft copper ring, a copper ring mounting groove and an annular plate spring;
the soft copper ring is made of copper or copper alloy, the main body is annular, and the soft copper ring is positioned in the copper ring positioning groove;
the copper ring mounting groove is arranged on the inner wall of the joint body, is positioned at the thread end point of the female thread in the space position, and is essentially an annular gap formed between the joint body and the oil pipe end after assembly;
the annular plate spring is positioned on the copper ring mounting groove and abuts against the soft copper ring, the main body is a ring with a notch, the annular plate spring is used for limiting the deformation range of the soft copper ring when the joint is screwed up, so that the soft copper ring fills the copper ring mounting groove to further improve the sealing effect, and the annular plate spring plays a role in releasing self elastic potential energy to apply pressure to the soft copper ring when the oil gas well titanium alloy threaded oil pipe joint is subjected to tensile or bending load so as to force the soft copper ring to always attach the joint body and the oil pipe end; the copper ring pressing assembly is also included;
the joint body also comprises a positioning hole, a passing port and a plug body;
the positioning hole is arranged on the inner wall of the joint body, is the same as the axial direction of the passing port and is used for positioning the copper ring compression assembly;
the passing port penetrates through the joint body and is a through hole, and the axial direction of the passing port is perpendicular to the axial direction of the joint body and is used for passing the copper ring compression assembly;
the plug body is used for plugging the passing port;
the copper ring compacting assembly comprises a central rotating rod, a rotating rod positioning assembly, a compacting wheel sliding assembly, a compacting wheel rotating assembly and a control unit;
the central rotating rod is in a rod shape and is used for supporting and positioning the compacting wheel assembly, the compacting wheel sliding assembly and the compacting wheel rotating assembly and driving the compacting wheel sliding assembly and the compacting wheel rotating assembly to operate;
the rotating rod positioning assembly is matched with the positioning hole to fixedly connect the central rotating rod on the joint body in a rotating way;
the compaction wheel assembly is in direct contact with the inner wall of the joint body and is used for extruding the annular plate spring under the drive of the compaction wheel sliding assembly and the compaction wheel rotating assembly;
the center rotating rod comprises a threaded part, a polished rod part and a threaded rod rotation driving assembly;
the polish rod part is positioned at two ends of the central rotating rod, the thread part is positioned at the middle position of the central rotating rod, and the thread part is used for driving the compaction wheel sliding assembly and the compaction wheel rotating assembly to operate;
the threaded rod rotation driving assembly is positioned at one end of the central rotating rod and used for driving the central rotating rod to rotate;
when in actual use, a polish rod part far away from one end of the threaded rod rotation driving assembly is inserted into the positioning hole;
the rotating rod positioning assembly plays a role in positioning the central rotating rod;
the compacting wheel assembly comprises a wheel body and a wheel body supporting assembly;
the wheel body is spherical, the number of the wheel bodies is 4, and the balls are connected to the wheel body supporting assembly;
the wheel body supporting component comprises a supporting plate, a wheel body positioning rod, a torsion spring, a rotation limiting component and a positioning rod pulling component;
the support plates are plate-shaped, are symmetrically arranged and are used for supporting the wheel body positioning rods, and the number of the wheel body positioning rods is 4 and is used for supporting and positioning the wheel body;
the two wheel bodies, the two wheel body positioning rods and one supporting plate are in one group, two groups are divided, and the two groups are symmetrically arranged by taking the central rotating rod as an axis;
one end of the wheel body positioning rod is positioned with a wheel body, the other end of the wheel body positioning rod is rotatably and fixedly connected with one end of the supporting plate, and the connecting part is positioned with the torsion spring; the other wheel body locating rod of the group is located at the other end of the supporting plate; the rotation limiting component is plate-shaped and is positioned at two ends of the supporting plate, which are close to the wheel body positioning rod, and is used for limiting the rotation angle of the wheel body positioning rod during running;
the positioning rod pulling assembly comprises a pulling rope, a pulling rope retraction assembly and a retraction assembly shell, and is used for pulling the wheel body positioning rod to force the wheel body to always abut against the inner wall of the joint body;
the rolling assembly shell is positioned on the compacting wheel rotating assembly and is used for bearing and positioning the pulling rope rolling assembly, the number of the pulling ropes is 4, the uniform ends of the pulling ropes are fixed on the wheel body positioning rod, and the other ends of the pulling ropes are wound and positioned on the pulling rope rolling assembly;
the pulling rope winding and unwinding component is a winding mechanism.
2. The hydrocarbon well titanium alloy threaded tubing joint of claim 1, further comprising a third seal assembly;
the third sealing assembly comprises an annular bin body, an inlet, an outlet, an inlet and outlet sealing assembly and a rubber injection assembly;
the annular bin body is an annular groove and is arranged on the inner wall of the joint body, the spatial position of the annular bin body is positioned on the joint body and is close to the female joint sealing surface, and after the joint body is in threaded connection with the oil pipe joint, the annular bin body becomes a closed bin body;
the inlet and the outlet are positioned on the joint body, communicated with the annular bin body and used for feeding and discharging raw materials used for pouring the sealing ring;
the entrance closing component is used for closing the entrance and the output opening;
the rubber injection assembly plays a role in heating raw materials used for pouring the sealing ring and injecting the raw materials into the through hole.
3. The titanium alloy threaded oil pipe joint of an oil and gas well according to claim 1, wherein the joint body is hollow and cylindrical, a female thread and a female sealing surface are arranged on the joint body, and the joint body is a foundation for processing the female thread and the female sealing surface;
the oil pipe end is a foundation for processing the male thread and the male sealing surface;
the female thread is in threaded connection with the male thread to play a role in connecting the joint body and the oil pipe end;
the female sealing surface and the male sealing surface are in interference fit when the female thread and the male thread are connected to the thread end position in a threaded manner;
the female sealing surface comprises a female spherical surface and a female conical surface; the male sealing surface comprises a male spherical surface and a male conical surface.
4. The oil and gas well titanium alloy threaded oil pipe joint as set forth in claim 1 wherein said annular leaf spring further comprises a leaf spring anti-slip assembly positioned on the annular leaf spring as a dimple, protrusion, groove or hole densely distributed on the annular leaf spring to function to facilitate the close fitting of the annular leaf spring to said soft copper ring.
5. The hydrocarbon well titanium alloy threaded oil pipe joint as set forth in claim 1 wherein the hydrocarbon well threaded oil pipe joint is made of titanium alloy.
6. The application method of the oil-gas well titanium alloy threaded oil pipe joint is characterized by matching the oil-gas well titanium alloy threaded oil pipe joint as claimed in claim 1, and the method comprises the following steps:
1) The joint body is arranged on the end of the oil pipe and is screwed down;
2) Opening the plug body, and filling the copper ring compression assembly into the joint body through the passing port;
3) After that, the central rotating rod is driven to rotate by the screw rod rotation driving assembly; when the central rotating rod rotates, the pipe body fixing and locking assembly is in an operating state, the sliding block slides along with the rotation of the central rotating rod, and the compacting wheel assembly gradually slides to the annular plate spring until the compacting wheel assembly abuts against the annular plate spring;
4) The telescopic driving assembly is controlled to operate through the control unit, and the compacting wheel assembly is driven to rotate 180 degrees or more around the axis of the joint body by means of contact between the force assembly and the central rotating rod;
5) And the converging copper ring compacting assembly is taken out from the passing opening and closes the passing opening.
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| CN202110663891.9A CN113236147B (en) | 2021-06-16 | 2021-06-16 | Titanium alloy threaded oil pipe joint of oil and gas well and use method thereof |
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| CN202110663891.9A CN113236147B (en) | 2021-06-16 | 2021-06-16 | Titanium alloy threaded oil pipe joint of oil and gas well and use method thereof |
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| CN113236147B true CN113236147B (en) | 2024-03-08 |
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| CN113982497B (en) * | 2021-12-29 | 2022-04-08 | 烟台佑利技术有限公司 | Petroleum drill rod with protection structure and machining process thereof |
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| CN113236147A (en) | 2021-08-10 |
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