CN113236147A - Titanium alloy threaded oil pipe joint for oil and gas well and use method of titanium alloy threaded oil pipe joint - Google Patents
Titanium alloy threaded oil pipe joint for oil and gas well and use method of titanium alloy threaded oil pipe joint Download PDFInfo
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- CN113236147A CN113236147A CN202110663891.9A CN202110663891A CN113236147A CN 113236147 A CN113236147 A CN 113236147A CN 202110663891 A CN202110663891 A CN 202110663891A CN 113236147 A CN113236147 A CN 113236147A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000007789 sealing Methods 0.000 claims abstract description 76
- 230000000694 effects Effects 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 4
- 238000005056 compaction Methods 0.000 claims description 47
- 238000003825 pressing Methods 0.000 claims description 20
- 238000005452 bending Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000005381 potential energy Methods 0.000 claims description 3
- 230000009916 joint effect Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003860 storage 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
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000011835 investigation 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
- 238000012360 testing method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The application discloses a titanium alloy threaded oil pipe joint for an oil-gas well, which comprises a joint body, an oil pipe end head and a second sealing assembly; the second sealing component is positioned inside the joint body and used for improving the sealing effect; the second sealing component comprises a soft copper ring, a copper ring accommodating groove and an annular plate spring; the soft copper ring is made of copper or copper alloy, and the main body of the soft copper ring is annular and is positioned in the copper ring accommodating groove; the copper ring accommodating groove is arranged on the inner wall of the joint body, is positioned at the thread end point of the female head thread in a spatial position, and is essentially an annular gap formed between the joint body and the oil pipe end after being assembled; the annular plate spring is positioned on the copper ring placement 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 for an oil-gas well and a using method of the titanium alloy threaded oil pipe joint.
Background
Tubing strings are one of the key tubing tools used in large numbers in the oil and gas production process and are the channels connecting the formation with the surface. The threaded joint is used as a connecting part of an oil pipe and is used together with a pipe column for bearing the test of complex loads such as tension, compression, bending, internal pressure, external pressure, vibration and the like in a well for a long time. According to investigation, 64% of foreign oil pipe failure accidents occur at the threaded joint, and the domestic proportion is up to 86%. The threaded joint is actually the weakest part of the tubing.
The existing special threaded joint is characterized in that a male head and a female head are both provided with conical surfaces and spherical surfaces, the spherical surface of the male head is matched with the conical surface of the female head, and meanwhile, the spherical surface of the female head is matched with the conical surface of the male head; even if the structure has two sealing surfaces when the structure is frequently subjected to loads such as tension, compression, bending and the like, the situation of sealing failure is easy to occur.
Disclosure of Invention
The embodiment of the application provides an oil-gas well titanium alloy threaded oil pipe joint, solves the technical problem that in the prior art, the oil-gas well titanium alloy threaded oil pipe joint is prone to sealing failure due to frequent loads such as stretching, compression and bending, and achieves the technical effect that the probability of sealing failure of the oil-gas well titanium alloy threaded oil pipe joint is small.
The embodiment of the application provides a titanium alloy threaded oil pipe joint for an oil-gas well, which comprises a joint body, an oil pipe end head and a second sealing assembly;
the second sealing component is positioned inside the joint body and used for improving the sealing effect;
the second sealing component comprises a soft copper ring, a copper ring accommodating groove and an annular plate spring;
the soft copper ring is made of copper or copper alloy, and the main body of the soft copper ring is annular and is positioned in the copper ring accommodating groove;
the copper ring accommodating groove is arranged on the inner wall of the joint body, is positioned at the thread end point of the female head thread in a spatial position, and is essentially an annular gap formed between the joint body and the oil pipe end after being assembled;
annular leaf spring location copper ring mounting groove on, contradict soft copper ring, the main part is the ring that has the breach for restriction when the joint is screwed up soft copper ring's deformation scope, make soft copper ring fill copper ring mounting groove and then promote sealed effect to play and release self elastic potential energy when oil gas well titanium alloy screw thread oil pipe joint receives tensile or bending load to soft copper ring exert pressure and then force soft copper ring laminate joint body and oil pipe joint's effect all the time.
A third seal assembly is also included;
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 close to the female head 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, are communicated with the annular bin body and are used for feeding and discharging raw materials for pouring the sealing ring;
the inlet and outlet closing assembly is used for closing the inlet and the outlet;
the rubber injection assembly plays a role in heating and injecting raw materials for pouring the sealing ring into the through opening.
Preferably, the joint body further comprises a positioning hole, a through hole and a plug body;
the positioning hole is arranged on the inner wall of the joint body, is the same as the passing hole in axial direction, and is used for positioning the copper ring pressing assembly;
the passing opening penetrates through the joint body, is a through hole, has the same axial direction as the joint body, and is used for the copper ring pressing assembly to pass through;
the plug body is used for plugging the passing opening;
still include the copper ring and compress tightly the subassembly
The copper ring pressing assembly comprises a central rotating rod, a rotating rod positioning assembly, a compaction wheel sliding assembly, a compaction wheel rotating assembly and a control unit;
the central rotating rod is in a rod shape and is used for supporting and positioning the compaction wheel assembly, the compaction wheel sliding assembly and the compaction wheel rotating assembly and driving the compaction wheel sliding assembly and the compaction wheel rotating assembly to run;
the rotating rod positioning assembly is matched with the positioning hole to fixedly and rotatably connect the central rotating rod to the joint body;
the compaction wheel assembly is in direct contact with the inner wall of the joint body and is used for pressing the annular plate spring under the driving of the compaction wheel sliding assembly and the compaction wheel rotating assembly.
The joint body is hollow cylindrical and is provided with female threads and a female sealing surface, and the joint body is a basis for processing the female threads and the female sealing surface;
the oil pipe end is a foundation for processing male threads and a male sealing surface;
the female thread is in threaded connection with the male thread, and the function of connecting the joint body with the end of the oil pipe is achieved;
the female head sealing surface and the male head sealing surface are in interference fit when female head threads and the male head threads are connected to thread end positions in a threaded manner;
the female head sealing surface comprises a female head spherical surface and a female head conical surface; the male sealing surface comprises a male spherical surface and a male conical surface.
Preferably, the central rotating rod comprises a threaded portion, a rod portion and a threaded rod rotation driving assembly;
the polished rod part is positioned at two ends of the central rotating rod, the threaded part is positioned in the middle of the central rotating rod, and the threaded 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 is used for driving the central rotating rod to rotate;
when the device is actually used, the polished rod part at one end far away from 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 said compaction wheel assembly comprises a wheel body and a wheel body support assembly;
the wheel bodies are spherical, the number of the wheel bodies is 4, and the wheel bodies are in ball joint with the wheel body supporting assemblies;
the wheel body supporting assembly comprises a supporting plate, a wheel body positioning rod, a torsion spring, a rotation limiting assembly and a positioning rod pulling assembly;
the two support plates are symmetrically arranged and are used for supporting the wheel body positioning rods, and the wheel body positioning rods are rod-shaped and 4 in number and are used for supporting and positioning the wheel bodies;
the two wheel bodies, the two wheel body positioning rods and the supporting plate form one group, and the two groups are arranged in an axisymmetric manner 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 torsional spring is positioned at the connection position; the other wheel body positioning rod of the group is positioned at the other end of the supporting plate; the rotation limiting assembly is in a plate shape, is positioned at two ends of the supporting plate close to the wheel body positioning rod and is used for limiting the rotation angle of the wheel body positioning rod during operation.
The preferred positioning rod pulling assembly comprises a pulling rope, a pulling rope retracting assembly and a retracting 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 retraction assembly shell is positioned on the compaction wheel sliding assembly and is used for bearing and positioning the pulling rope retraction assembly, the number of the pulling ropes is 4, one end of each pulling rope is fixed on the wheel body positioning rod, and the other end of each pulling rope retraction assembly is wound and positioned on the pulling rope retraction assembly;
the pulling rope winding and unwinding assembly is a winding mechanism.
Preferably annular leaf spring still includes leaf spring anti-skidding subassembly, and leaf spring anti-skidding subassembly is fixed a position on annular leaf spring, for pit, arch, groove or the hole of densely covered on annular leaf spring, plays the annular leaf spring of being convenient for and closely laminates the effect of soft copper ring.
The preferable 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 have at least the following technical effects or advantages:
the second sealing assembly 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 in the joint and comprises a soft copper ring and an annular plate spring which are matched, the sealing effect is improved by utilizing the extrusion deformation of the soft copper ring, and the sealing failure phenomenon is further avoided; the technical problem that the sealing failure phenomenon easily occurs when the titanium alloy threaded oil pipe joint of the oil and gas well 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 titanium alloy threaded oil pipe joint of the oil and gas well is low is further achieved.
Drawings
FIG. 1 is a cross-sectional view of a titanium alloy threaded tubing joint for an oil and gas well according to the present invention;
FIG. 2 is a schematic view of the internal structure of the titanium alloy threaded tubing joint for oil and gas wells of the present invention;
FIG. 3 is a schematic view of the appearance structure of the titanium alloy threaded tubing joint for oil and gas wells of the present invention;
FIG. 4 is a schematic structural view of an oil pipe end of the titanium alloy threaded oil pipe joint of the oil and gas well of the present invention;
FIG. 5 is a schematic structural view of an annular leaf spring of the titanium alloy threaded tubing joint of the oil and gas well of the present invention;
FIG. 6 is a schematic structural view of a copper ring hold-down assembly of the titanium alloy threaded tubing joint for oil and gas wells of the present invention;
FIG. 7 is a front view of a copper ring hold down assembly of the titanium alloy threaded tubing joint of the oil and gas well of the present invention;
FIG. 8 is a schematic structural view of a jumper pulling assembly of the titanium alloy threaded tubing joint of an oil and gas well according to the present invention;
FIG. 9 is a schematic structural view of a force-assist assembly of the titanium alloy threaded tubing joint for oil and gas wells of the present invention.
In the figure:
a connector body 100, a box thread 110, a box sealing surface 120, a locating hole 130, a pass-through opening 140, a plug body 150, a,
An oil pipe end 200, male threads 210, a male sealing surface 220,
A second sealing component 300, a soft copper ring 310, a copper ring placing groove 320, an annular plate spring 330, a plate spring antiskid component 340,
A copper ring pressing component 500,
A central rotating rod 510, a threaded portion 511, a polished rod portion 512, a threaded rod rotation drive assembly 512,
A rotating rod positioning component 520, an arc-shaped plate 521,
A compacting wheel assembly 530, a wheel body 531, a wheel body support assembly 532, a support plate 533, a wheel body securing lever 534, a torsion spring 535, a securing lever pulling assembly 536, a pull cord 537, a pull cord storage assembly 538, a storage assembly housing 539, a spring assembly housing, and a spring assembly housing,
Compacting wheel sliding assembly 540, rotating block 541, sliding block 542, supporting rod 543, connecting plate 544,
A compaction wheel rotating assembly 550, a center slide block 551, a force application rod 552, a folding rod 553, a telescopic rotating body 554, a force borrowing assembly 555 and a telescopic driving assembly 556;
Detailed Description
In order to facilitate an understanding of the present invention, the present application will now be described more fully with reference to the accompanying drawings; the preferred embodiments of the present invention are illustrated in the accompanying drawings, but the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is noted that the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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; as used herein, the term "and/or" 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 an oil and gas well according to the present invention is shown; 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 is through add second seal assembly 300 on the basis that oil gas well titanium alloy threaded oil pipe in prior art connects, and second seal assembly 300 location is inside connecting body 100, including soft copper ring 310 and the cooperation of annular leaf spring 330, utilizes soft copper ring 310's extrusion deformation to improve sealed effect, further avoids the emergence of sealed inefficacy phenomenon.
Example one
As shown in fig. 1, the titanium alloy threaded tubing joint for oil and gas wells of the present application comprises a joint body 100, a tubing head 200 and a second seal assembly 300;
as shown in fig. 2 and 3, the joint body 100 is a hollow cylinder, and is provided with a box thread 110 and a box sealing surface 120, and the joint body 100 is a basis for processing the box thread 110 and the box sealing surface 120; as shown in fig. 4, the oil pipe end 200 is a basis for machining a male thread 210 and a male 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 sealing surface 120 and the pin sealing surface 220 are in interference fit when the box threads 110 and the pin threads 210 are threaded into the 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, no further description is provided herein.
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 for improving the sealing effect; further, the second sealing assembly 300 includes a soft copper ring 310, a copper ring seating groove 320, and an annular plate spring 330; the soft copper ring is made of copper or copper alloy, the main body of the soft copper ring is annular, and the soft copper ring is positioned in the copper ring accommodating groove 320; the copper ring accommodating groove 320 is arranged on the inner wall of the joint body 100 and is positioned at the thread end point of the female thread 110 in spatial position, as shown in fig. 1, the copper ring accommodating groove 320 is essentially an annular gap formed between the joint body 100 and the oil pipe end 200 after being assembled; annular leaf spring 33 location copper ring mounting groove 320 on, contradict soft copper ring 310, the main part is the ring that has the breach for limit when the joint is screwed up the deformation scope of soft copper ring 310, make soft copper ring 310 fill copper ring mounting groove 320 and then promote sealed effect, and play and release self elastic potential energy when oil gas well titanium alloy threaded oil pipe joint receives tensile or bending load to soft copper ring 310 exert pressure and then force soft copper ring 310 to laminate joint body 100 and oil pipe joint 200 all the time.
Preferably, as shown in fig. 5, the annular plate spring 330 further comprises a plate spring anti-slip assembly 340, and the plate spring anti-slip assembly 340 is positioned on the annular plate spring 330 and is a concave pit, a convex pit, a groove or a hole or the like densely distributed on the annular plate spring 330, and plays a role of facilitating the annular plate spring 330 to be tightly attached to 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 titanium alloy threaded oil pipe joint of the oil and gas well 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 the sealing failure of the titanium alloy threaded oil pipe joint of the oil and gas well is low is achieved.
Example two
For further increasing the sealing effect and reducing the sealing failure probability, the third sealing assembly 400 is additionally arranged on the basis of the embodiment, the sealing ring is poured inside the joint body 100 in a field injection molding mode, and the sealing ring poured is attached to the joint body 100 and the oil pipe joint by utilizing the expansion with heat and contraction with cold 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 cartridge body 410, an inlet 420, an outlet 430, an inlet and outlet closure assembly 440, and a rubber injection assembly;
the annular bin body 410 is an annular groove and is arranged on the inner wall of the joint body 100, the annular bin body 410 is positioned on the joint body 100 close to the female sealing surface 120 in spatial position, and after the joint body 100 is in threaded connection with the oil pipe joint 200, the annular bin body 410 becomes a closed bin body; the inlet 420 and the outlet 430 are positioned on the joint body 100, are communicated with the annular bin body 410, and are used for feeding and discharging raw materials for pouring the sealing ring; the inlet and outlet sealing assembly 440 is used for sealing the inlet 420 and the outlet 430, and preferably has a plug structure; the rubber injection assembly plays a role in heating and injecting the raw materials for pouring the sealing ring into the inlet 420.
EXAMPLE III
Experiments show that when the deformation of the soft copper ring 310 is restrained, the annular plate spring 330 in the first embodiment may be twisted and dislocated due to the pressing force of the soft copper ring 310 on the annular plate spring 330 (the gap on the annular plate spring 330 may be twisted or dislocated when the annular plate spring 330 continues to bear the pressing force after being pressed and closed), which affects the effective performance of sealing; in view of the above problems, in the embodiment of the present application, the structure of the joint body 100 is modified on the basis of the above embodiments, and the copper ring pressing assembly 500 is used to apply pressure on the annular plate spring 330, so as to press the annular plate spring 330 flat and force the soft copper ring 310 to further fill the copper ring accommodating groove 320, thereby improving the sealing effect and reducing the sealing failure probability;
the method specifically comprises the following steps: the joint body 100 further comprises a positioning hole 130, a passing hole 140 and a plug body 150; the positioning hole 130 is arranged on the inner wall of the joint body 100, has the same axial direction as the passing hole 140, and is used for positioning the copper ring pressing assembly 500; the passing hole 140 penetrates through the joint body 100, is a through hole, has the same axial direction as the joint body 100, and is used for passing the copper ring pressing assembly 500; the plug body 150 is used for plugging the passing opening 140.
As shown in fig. 6-9, the copper ring pressing assembly 500 includes a central rotating rod 510, a rotating rod positioning assembly 520, a compaction wheel assembly 530, a compaction wheel sliding assembly 540, a compaction wheel rotating assembly 550, and a control unit; the central rotating rod 510 is in a rod shape and is used for supporting and positioning the compaction wheel assembly 530, the compaction wheel sliding assembly 540 and the compaction wheel rotating assembly 550 and driving the compaction wheel sliding assembly 540 and the compaction wheel rotating assembly 550 to operate; the rotating rod positioning assembly 520 cooperates with the positioning hole 130 to rotatably and fixedly connect the central rotating rod 510 to the joint body 100; the compactor wheel assembly 530 is in direct contact with the inner wall of the joint body 100, and is configured to press the annular plate spring 330 under the driving of the compactor wheel sliding assembly 540 and the compactor wheel rotating assembly 550;
further, as shown in fig. 6, the central rotating rod 510 includes a threaded portion 511, a polished rod portion 512 and a threaded rod rotation driving assembly 512; the polished rod part 512 is positioned at two ends of the central rotating rod 510, the threaded part 511 is positioned in the middle of the central rotating rod 510, and the threaded part 511 is used for driving the compaction wheel sliding assembly 540 and the compaction wheel rotating assembly 550 to run; the threaded rod rotation driving assembly 512 is positioned at one end of the central rotation rod 510, is used for driving the central rotation rod 510 to rotate, and can be a rotation handle, a motor and the like; in actual use, the polish rod portion 512 at the end of the drive assembly 512 away from the threaded rod is inserted into the positioning hole 130.
The rotating rod positioning assembly 520 plays a role in positioning the central rotating rod 510; preferably, the rotating rod positioning assembly 520 comprises an arc-shaped plate 521; the arc-shaped plate 521 can be attached to the joint main body 100, and the central rotating rod 510 penetrates through the arc-shaped plate 521 and is rotatably and fixedly connected to the arc-shaped plate 521;
said compaction wheel assembly 530 comprises a wheel body 531 and a wheel body support assembly 532; the wheel bodies 531 are preferably spherical, 4 in number, and are ball-jointed to the wheel body support assemblies 532; the wheel body support assembly 532 includes a support plate 533, a wheel body positioning bar 534, a torsion spring 535, a rotation limiting assembly, and a positioning bar pulling assembly 536; the support plates 533 are plate-shaped, two in number, and symmetrically arranged to support the wheel body positioning rods 534, and the wheel body positioning rods 534 are rod-shaped, 4 in number, and are used to support and position the wheel bodies 531; the two wheel bodies 531, the two wheel body positioning rods 534 and the one supporting plate 533 are in one group, and the two groups are arranged in an axisymmetric manner 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 position 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 supporting plate 533; the rotation limiting assembly is plate-shaped, and 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 operation;
as shown in fig. 7 and 8, the detent lever pulling assembly 536 includes a pulling rope 537, a pulling rope retracting assembly 538 and a retracting assembly housing 539, and is used for pulling the wheel body detent lever 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 compactor wheel sliding assembly 540 and is used for bearing and positioning the pulling rope retraction assembly 538, the number of the pulling ropes 537 is 4, one end of each pulling rope is fixed on the wheel body positioning rod 534, and the other end of each pulling rope retraction assembly housing 539 is wound and positioned on the pulling rope retraction assembly 538; the pulling rope retracting component 538 is a hoisting mechanism;
the compacting wheel sliding assembly 540 is used for driving the wheel body 531 to slide along the axial direction of the joint body 100; further, the compactor wheel sliding assembly 540 comprises a rotating block 541, a sliding block 542, a supporting rod 543 and a connecting plate 544; the rotating block 541 is rotatably and fixedly connected to the polished rod portion 512 far away from the threaded rod rotating drive assembly 513; the sliding block 542 is slidably positioned on the threaded portion 511, and comprises a block main body, a threaded pipe body and a pipe body locking assembly; the threaded pipe body is a pipe with threads arranged inside and is matched with the threaded part 511; the threaded pipe body is rotatably and fixedly connected to the block body; the pipe body locking assembly is used for locking the relative movement between the threaded pipe body and the block body, and the structure of the pipe body locking assembly 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 one group, two groups are symmetrically arranged, and two groups in the same group are symmetrically arranged; one end of one of the supporting rods 543 in the same group is rotatably and fixedly connected to the rotating block 541, and the other end of the supporting rod 543 in the same group 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 of the supporting rod 543 is rotatably and fixedly connected to the connecting plate 544; the rotating block 541 further comprises a limiting component, and the limiting component is used for limiting 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 used for driving the compactor wheel assembly 530 to rotate around the axis of the joint body 100;
preferably, the compactor wheel rotation assembly 550 is configured as a motor;
preferably, as shown in fig. 6 and 9, the compactor wheel rotation assembly 550 includes a center slide block 551, a force application rod 552, a folding rod 553, a telescoping rotator 554, a borrowing assembly 555, and a telescoping drive assembly 556; the central sliding block 551 is slidably positioned on the threaded portion 511 and is positioned 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 is a combination of 4 rods, which is approximately diamond-shaped, and has one end positioned on the force application rod 552 and the other end positioned on the telescopic rotating body 554; the telescopic rotating body 554 is a telescopic rod structure and can be rotatably and fixedly connected to the central sliding block 551; the telescopic driving assembly 556 is used for driving the telescopic rotating body 554 to extend and retract; the force-borrowing assembly 555 is of a worm gear structure and is positioned at one end of the telescopic rotating body 554 close to the threaded part 511; for transmitting the rotational motion of the central rotating rod 510 to the compaction wheel assembly 530.
The control unit is used for controlling the operation of the tube body locking assembly and the telescopic driving assembly 556, and is not described herein for the prior art.
When the threaded oil pipe joint for the oil and gas well is actually used, the joint body 100 is firstly installed on an oil pipe end head 200 and screwed tightly; then the plug body 150 is opened, and the copper ring pressing assembly 500 is filled into the joint body 100 through the through hole 140; after which the central rotating rod 510 is driven to rotate by the screw rod rotation driving assembly; when the central rotating rod 510 rotates, the tube 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 compaction wheel assembly gradually slides towards the annular plate spring 330 until the compaction wheel assembly abuts against the annular plate spring 330 (at this time, the limiting assembly operates, and the tube body locking assembly stops operating); the positioning rod pulling assembly 536 always runs during the rotation of the central rotating rod 510; then the control unit controls the telescopic driving component to operate, the force-assisted component is contacted with the central rotating rod, and the compaction wheel component 530 is driven to rotate 180 degrees or more around the axis of the joint body 100 (not too much, which can lead the pulling rope 537 to wind); finally, the copper ring pressing assembly 500 is retracted, taken out of the through opening 140 and closed to the through opening 140.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A titanium alloy threaded oil pipe joint for an oil-gas well comprises a joint body and an oil pipe end head and is characterized by further comprising a second sealing assembly;
the second sealing component is positioned inside the joint body and used for improving the sealing effect;
the second sealing component comprises a soft copper ring, a copper ring accommodating groove and an annular plate spring;
the soft copper ring is made of copper or copper alloy, and the main body of the soft copper ring is annular and is positioned in the copper ring accommodating groove;
the copper ring accommodating groove is arranged on the inner wall of the joint body, is positioned at the thread end point of the female head thread in a spatial position, and is essentially an annular gap formed between the joint body and the oil pipe end after being assembled;
annular leaf spring location copper ring mounting groove on, contradict soft copper ring, the main part is the ring that has the breach for restriction when the joint is screwed up soft copper ring's deformation scope, make soft copper ring fill copper ring mounting groove and then promote sealed effect to play and release self elastic potential energy when oil gas well titanium alloy screw thread oil pipe joint receives tensile or bending load to soft copper ring exert pressure and then force soft copper ring laminate joint body and oil pipe joint's effect all the time.
2. The titanium alloy threaded tubing joint for oil and gas wells 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 close to the female head 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, are communicated with the annular bin body and are used for feeding and discharging raw materials for pouring the sealing ring;
the inlet and outlet closing assembly is used for closing the inlet and the outlet;
the rubber injection assembly plays a role in heating and injecting raw materials for pouring the sealing ring into the through opening.
3. A titanium alloy threaded tubing joint for oil and gas wells according to claim 1 or 2, wherein said titanium alloy threaded tubing joint is
The joint body also comprises a positioning hole, a through hole and a plug body;
the positioning hole is arranged on the inner wall of the joint body, is the same as the passing hole in axial direction, and is used for positioning the copper ring pressing assembly;
the passing opening penetrates through the joint body, is a through hole, has the same axial direction as the joint body, and is used for the copper ring pressing assembly to pass through;
the plug body is used for plugging the passing opening;
still include the copper ring and compress tightly the subassembly
The copper ring pressing assembly comprises a central rotating rod, a rotating rod positioning assembly, a compaction wheel sliding assembly, a compaction wheel rotating assembly and a control unit;
the central rotating rod is in a rod shape and is used for supporting and positioning the compaction wheel assembly, the compaction wheel sliding assembly and the compaction wheel rotating assembly and driving the compaction wheel sliding assembly and the compaction wheel rotating assembly to run;
the rotating rod positioning assembly is matched with the positioning hole to fixedly and rotatably connect the central rotating rod to the joint body;
the compaction wheel assembly is in direct contact with the inner wall of the joint body and is used for pressing the annular plate spring under the driving of the compaction wheel sliding assembly and the compaction wheel rotating assembly.
4. The titanium alloy threaded tubing joint for oil and gas wells as claimed in claim 1, wherein said joint body is hollow cylindrical and has a box thread and a box sealing surface thereon, the joint body being a foundation for machining the box thread and the box sealing surface;
the oil pipe end is a foundation for processing male threads and a male sealing surface;
the female thread is in threaded connection with the male thread, and the function of connecting the joint body with the end of the oil pipe is achieved;
the female head sealing surface and the male head sealing surface are in interference fit when female head threads and the male head threads are connected to thread end positions in a threaded manner;
the female head sealing surface comprises a female head spherical surface and a female head conical surface; the male sealing surface comprises a male spherical surface and a male conical surface.
5. The titanium alloy threaded tubing joint for oil and gas wells as claimed in claim 3, wherein said central rotating rod comprises a threaded portion, a smooth rod portion and a threaded rod rotation drive assembly;
the polished rod part is positioned at two ends of the central rotating rod, the threaded part is positioned in the middle of the central rotating rod, and the threaded 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 is used for driving the central rotating rod to rotate;
when the device is actually used, the polished rod part at one end far away from 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.
6. The titanium alloy threaded oil pipe joint for oil and gas wells as claimed in claim 5, wherein said compaction wheel assembly comprises a wheel body and a wheel body support assembly;
the wheel bodies are spherical, the number of the wheel bodies is 4, and the wheel bodies are in ball joint with the wheel body supporting assemblies;
the wheel body supporting assembly comprises a supporting plate, a wheel body positioning rod, a torsion spring, a rotation limiting assembly and a positioning rod pulling assembly;
the two support plates are symmetrically arranged and are used for supporting the wheel body positioning rods, and the wheel body positioning rods are rod-shaped and 4 in number and are used for supporting and positioning the wheel bodies;
the two wheel bodies, the two wheel body positioning rods and the supporting plate form one group, and the two groups are arranged in an axisymmetric manner 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 torsional spring is positioned at the connection position; the other wheel body positioning rod of the group is positioned at the other end of the supporting plate; the rotation limiting assembly is in a plate shape, is positioned at two ends of the supporting plate close to the wheel body positioning rod and is used for limiting the rotation angle of the wheel body positioning rod during operation.
7. The oil-gas well titanium alloy threaded oil pipe joint according to claim 6, wherein the jumper pulling assembly comprises a pulling rope, a pulling rope retracting assembly and a retracting assembly housing, and is used for pulling the wheel body jumper to force the wheel body to always abut against the inner wall of the joint body;
the retraction assembly shell is positioned on the compaction wheel sliding assembly and is used for bearing and positioning the pulling rope retraction assembly, the number of the pulling ropes is 4, one end of each pulling rope is fixed on the wheel body positioning rod, and the other end of each pulling rope retraction assembly is wound and positioned on the pulling rope retraction assembly;
the pulling rope winding and unwinding assembly is a winding mechanism.
8. The oil and gas well titanium alloy threaded oil pipe joint according to claim 1, wherein the annular plate spring further comprises a plate spring anti-slip component, the plate spring anti-slip component is positioned on the annular plate spring and is a pit, a bulge, a groove or a hole densely distributed on the annular plate spring, and the function of facilitating the close adhesion of the annular plate spring to the soft copper ring is achieved.
9. The oil and gas well titanium alloy threaded tubing joint of claim 1, wherein the oil and gas well threaded tubing joint is made of titanium alloy.
10. The use method of the titanium alloy threaded oil pipe joint for the oil and gas well is characterized in that the titanium alloy threaded oil pipe joint for the oil and gas well as defined in claim 7 is matched, and the method comprises the following steps:
1) installing and screwing the joint body on the end head of the oil pipe;
2) opening the plug body, and filling the copper ring pressing assembly into the joint body through the access opening;
3) after that, the central rotating rod is driven to rotate by the screw rod rotation driving component; when the central rotating rod rotates, the pipe body fixing and locking assembly is in a running state, the sliding block body slides along with the rotation of the central rotating rod, and the compaction wheel assembly gradually slides towards the position of the annular plate spring until the compaction wheel assembly abuts against the annular plate spring;
4) the telescopic driving assembly is controlled to operate by the control unit, the force-borrowing assembly is in contact with the central rotating rod, and the compaction wheel assembly is driven to rotate by 180 degrees or more around the axis of the joint body;
5) and (4) bundling the copper ring pressing assembly, taking out the copper ring pressing assembly from the passing opening and closing the passing opening.
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