CN116398060A - High leakproofness petroleum casing pipe joint with self-locking function - Google Patents
High leakproofness petroleum casing pipe joint with self-locking function Download PDFInfo
- Publication number
- CN116398060A CN116398060A CN202310542708.9A CN202310542708A CN116398060A CN 116398060 A CN116398060 A CN 116398060A CN 202310542708 A CN202310542708 A CN 202310542708A CN 116398060 A CN116398060 A CN 116398060A
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- sleeve
- sealing
- sealing ring
- joint body
- joint
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- 239000003208 petroleum Substances 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 158
- 239000013013 elastic material Substances 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 36
- 238000001125 extrusion Methods 0.000 claims description 29
- 239000010687 lubricating oil Substances 0.000 claims description 17
- 230000001050 lubricating effect Effects 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000002035 prolonged effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 239000003129 oil well Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N11/00—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups
- F16N11/04—Spring-loaded devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1042—Elastomer protector or centering means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a high-tightness petroleum casing joint with a self-locking function, and relates to the technical field of petroleum casings. The technical problems of the invention are as follows: at present, the joint is connected with the sleeve through bolts only, and the pretightening force of the threaded connection part of the joint and the sleeve can be poor after long-time use. A high-tightness petroleum casing joint with a self-locking function comprises a joint body and the like; the connector body is provided with the internal thread of symmetric distribution, and the internal thread department threaded connection of connector body has the sleeve pipe, and connector body rigid coupling has the first sealing ring of symmetric distribution, and the material of first sealing ring is elastic material, and one side that the sleeve pipe is close to first sealing ring is provided with the arcwall face, and first sealing ring and adjacent sheathed tube arcwall face sealing fit. According to the invention, the right side of the sleeve is wrapped by the first sealing ring, so that the contact area between the sleeve and the first sealing ring is increased, and the tightness between the sleeve and the joint body is further increased.
Description
Technical Field
The invention relates to the technical field of petroleum casing pipes, in particular to a high-tightness petroleum casing pipe joint with a self-locking function.
Background
The petroleum casing is a steel pipe for supporting the well wall, the petroleum casing protects the oil pipe to ensure the normal operation of the whole oil well after the well drilling process and the well completion, the depth of the oil well is generally hundreds of meters or thousands of meters, a plurality of casings are required to be connected together, the current connection mode comprises direct connection, joint connection and the like, and the bolt connected by the joint provides pretightening force to ensure the tightness of the connection of the petroleum pipeline.
At present, the joint and the sleeve are connected through bolts only, the pretightening force of the joint and the threaded connection part of the sleeve can be worsened after the joint is used for a long time, gaps are formed between the joint and the threaded connection part of the sleeve, the corresponding tightness can be reduced, the sleeve can shake when the sleeve is put into an oil well, little shake can lead to friction at the threaded connection part between the sleeve and the joint, deformation of the threaded connection part of the joint can be caused for a long time, the gaps between the joint and the threaded connection part of the sleeve are further increased, and petroleum in a well is caused to leak from the gaps between the sleeve and the joint.
Disclosure of Invention
In order to solve the technical problems, the invention provides a self-lubricating high-tightness petroleum casing joint with a self-locking function.
The technical implementation scheme of the invention is as follows: the utility model provides a high leakproofness petroleum casing pipe joint with self-locking function, including the joint body, the joint body is provided with the internal thread of symmetric distribution, the internal thread department threaded connection of joint body has the sleeve pipe, the joint body rigid coupling has the first sealing ring of symmetric distribution, the material of first sealing ring is elastic material, the sleeve pipe is close to one side of first sealing ring and is provided with the arcwall face, first sealing ring and adjacent sheathed tube arcwall face seal fit, the joint body is provided with the sealing mechanism of symmetric distribution, sealing mechanism is with joint body and sleeve pipe further seal, first sealing ring receives the sleeve pipe extrusion to take place deformation, sleeve pipe and first sealing ring area of contact increase;
the sealing mechanism comprises a second sealing ring, the sleeve is provided with a reducing part, the second sealing ring is arranged on one side of the reducing part, the second sealing ring is made of elastic materials, the inner diameter of the second sealing ring is larger than that of the sleeve thread, the joint body is provided with symmetrically distributed external threads, the pitch of the external threads of the joint body is smaller than that of the internal threads of the joint body, the outer side of the joint body is connected with a fastening sleeve, the fastening sleeve is fixedly connected with an extrusion ring matched with the second sealing ring, the outer ring surface of the second sealing ring is provided with symmetrically distributed inclined surfaces, the two ends of the joint body are provided with first extrusion inclined surfaces, the extrusion ring is provided with second extrusion inclined surfaces, one inclined surface of the second sealing ring is matched with the first extrusion inclined surfaces, the other inclined surface of the second sealing ring is matched with the second extrusion inclined surfaces, and the fastening sleeve is provided with a locking component used for limiting the sleeve.
Preferably, the inner annular surface of the second sealing ring is provided with an annular protrusion, and the sleeve is provided with an annular groove matched with the annular protrusion of the second sealing ring for increasing the contact area between the second sealing ring and the sleeve.
Preferably, the locking assembly comprises first connecting blocks distributed at equal intervals in the circumferential direction, the first connecting blocks distributed at equal intervals are fixedly connected to one side, far away from the joint body, of the fastening sleeve, a limiting block is connected in the first connecting blocks in a sliding mode, a first spring is fixedly connected between the limiting block and the first connecting blocks, an arc-shaped surface is arranged on the limiting block, second connecting blocks distributed at equal intervals in the circumferential direction are fixedly connected to the sleeve, the second connecting blocks are distributed with the first connecting blocks in a staggered mode, and limiting grooves matched with the limiting blocks in a limiting mode are formed in the second connecting blocks.
Preferably, the material of stopper sets up to elastic material for increase stopper and second connecting block's area of contact.
Preferably, the limiting block is provided with a limiting protrusion in limiting fit with the limiting groove of the second connecting block, and is used for locking the second connecting block.
Preferably, the lubricating assembly is arranged on the joint body, the lubricating assembly is used for lubricating the external threads of the sleeve and the internal threads of the joint body, the lubricating assembly comprises a push plate, the joint body is provided with an oil storage cavity, the push plate is slidably connected in the oil storage cavity, lubricating oil is stored on one side of the push plate, which is close to the sleeve, of the push plate, a second spring is fixedly connected between the push plate and the joint body, the push plate is penetratingly slidably connected with a sealing rod which is in sealing fit with the oil storage cavity, a third spring is fixedly connected between the sealing rod and the joint body, and the elastic coefficient of the third spring is larger than that of the second spring.
Preferably, one side of the sealing rod, which is far away from the push plate, is arranged in a spherical shape, and one side of the oil storage cavity, which is close to the inner wall of the joint body, is in sealing fit with the spherical part of the sealing rod, so that the contact area between the sealing rod and the oil storage cavity is increased.
Preferably, the protection assembly is arranged on the fastening sleeve and comprises symmetrically distributed fixing rings which are respectively connected with the adjacent fastening sleeve in a rotating way, and equidistant elastic sheets are hinged between the symmetrically distributed fixing rings.
Preferably, the thickness of the middle part of the elastic sheet is greater than the thickness of both sides thereof for increasing the service life of the elastic sheet.
The invention has the following advantages: according to the invention, the right side of the sleeve is wrapped by the first sealing ring, the contact area of the sleeve and the first sealing ring is increased, the tightness between the sleeve and the joint body is further increased, petroleum is prevented from leaking from the sleeve to the joint, the left side and the right side of the threaded position of the sleeve are sealed by the first sealing ring and the second sealing ring, the tightness of the threaded position of the sleeve and the joint body is increased, the shaking between the sleeve and the joint body is buffered by the first sealing ring and the second sealing ring, the rigid contact of the threaded position of the sleeve and the joint body is prevented, the threaded position of the sleeve and the joint body is prevented from being damaged, the abrasion between the sleeve and the joint body is reduced by filling lubricating oil into the threaded position of the sleeve and the joint body, the sleeve can smoothly enter the joint body, the collision force is buffered by deformation of the elastic sheet, the shaking amplitude of the joint body is reduced, and the joint body is protected.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of the joint body and the fastening sleeve.
Fig. 3 is a schematic perspective view of the joint body and sleeve of the present invention.
Fig. 4 is a schematic perspective view of the sealing mechanism of the present invention.
Fig. 5 is an enlarged perspective view of fig. 4 a according to the present invention.
Fig. 6 is an enlarged perspective view of fig. 4B according to the present invention.
Fig. 7 is a schematic perspective view of a locking assembly according to the present invention.
Fig. 8 is a schematic perspective view of the first connecting block, the limiting block and other parts.
Fig. 9 is a schematic perspective view of a lubrication assembly according to the present invention.
Reference numerals illustrate: the novel high-pressure oil-saving connector comprises a 1-connector body, a 101-first extrusion inclined plane, a 102-oil storage cavity, a 2-sleeve, a 201-diameter changing part, a 3-first sealing ring, a 301-second sealing ring, a 4-fastening sleeve, a 5-extrusion ring, a 501-second extrusion inclined plane, a 6-first connecting block, a 7-limiting block, a 701-limiting protrusion, an 8-first spring, a 9-second connecting block, a 10-push plate, a 11-second spring, a 12-sealing rod, a 13-third spring, a 14-fixing ring and a 15-elastic sheet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent. It is only stated that the terms of orientation such as up, down, left, right, front, back, inner, outer, etc. used in this document or the imminent present invention, are used only with reference to the drawings of the present invention, and are not meant to be limiting in any way.
Example 1
The utility model provides a high leakproofness petroleum casing pipe joint with self-locking function, as shown in fig. 1-5, including joint body 1, joint body 1 is provided with two internal screw threads of symmetric distribution, set up to annular arch between two internal screw threads of joint body 1, joint body 1's inboard threaded connection has sleeve pipe 2, joint body 1 annular bellied internal diameter equals with sleeve pipe 2's internal diameter, guarantee petroleum's circulation, joint body 1 inlays two first sealing rings 3 of symmetric distribution, the material of first sealing ring 3 is elastic material, sleeve pipe 2 is provided with the arcwall face near one side of first sealing ring 3, the arcwall face sealing fit of first sealing ring 3 and adjacent sleeve pipe 2, sleeve pipe 2 on the left side moves right, sleeve pipe 2's arcwall face card goes into the left surface of left side first sealing ring 3, first sealing ring 3 wraps up sleeve pipe 2's right side, sleeve pipe 2 and first sealing ring 3's area of contact has been increased, further increase sleeve pipe 2 and joint body 1 between the leakproofness, joint body 1 is provided with symmetric distribution's sealing mechanism, sealing mechanism is with joint body 1 and sleeve pipe 2 further sealed.
As shown in fig. 1-6, the sealing mechanism comprises a second sealing ring 301, the sleeve 2 is provided with a reducing part 201, the second sealing ring 301 is arranged on one side of the joint body 1, which is positioned on the reducing part 201, the second sealing ring 301 on the left side is positioned on the left side of the reducing part 201 on the left side, the second sealing ring 301 on the right side is positioned on the right side of the reducing part 201 on the right side, the material of the second sealing ring 301 is elastic material, the inner diameter of the second sealing ring 301 is larger than the outer diameter of the thread of the sleeve 2, the sleeve 2 on the left side cannot contact with the second sealing ring 301 in the rightward moving process, the contact of the second sealing ring 301 is avoided, the sealing performance of the second sealing ring 301 is influenced by friction, the inner ring surface of the second sealing ring 301 is provided with an annular bulge, the sleeve 2 is provided with an annular groove matched with the annular bulge of the second sealing ring 301, the inner ring surface of the second sealing ring 301 is clamped into the annular groove of the sleeve 2, the second sealing ring 301 clamped into the annular groove of the sleeve 2 is still in a deformation state, the annular groove of the sleeve 2 is extruded by means of the deformation force of the second sealing ring 301, the tightness between the second sealing ring 301 and the sleeve 2 is improved, the joint body 1 is provided with symmetrically distributed external threads, the pitch of the external threads of the joint body 1 is smaller than that of the internal threads of the joint body, the outer threads of the joint body 1 are connected with the fastening sleeve 4, the fastening sleeve 4 is fixedly connected with the extrusion ring 5 matched with the second sealing ring 301, the extrusion ring 5 is positioned at one side, far away from the threads, of the fastening sleeve 4, one side, close to the second sealing ring 301, of the extrusion ring 5 is provided with annular protrusions with triangular cross sections, the outer annular surface of the second sealing ring 301 is provided with symmetrically distributed inclined surfaces, two ends of the joint body 1 are provided with first extrusion inclined surfaces 101, the extrusion ring 5 is provided with second extrusion inclined surfaces 501, the inclined surface of the second sealing ring 301 away from the extrusion ring 5 is matched with the first extrusion inclined surface 101, the inclined surface of the second sealing ring 301 away from the joint body 1 is matched with the second extrusion inclined surface 501, and the fastening sleeve 4 is provided with a locking assembly for limiting the sleeve 2.
As shown in fig. 3, fig. 7 and fig. 8, the locking assembly includes first connecting blocks 6 distributed at equal intervals in the circumferential direction, the first connecting blocks 6 distributed at equal intervals are fixedly connected to one side, away from the joint body 1, in the fastening sleeve 4, the first connecting blocks 6 are provided with rectangular grooves, limiting blocks 7 are slidably connected in the rectangular grooves of the first connecting blocks 6, first springs 8 are fixedly connected between the limiting blocks 7 and the first connecting blocks 6, the first springs 8 are located in the rectangular grooves of the first connecting blocks 6, one side, away from the first springs 8, of the limiting blocks 7 is provided with arc-shaped surfaces, second connecting blocks 9 distributed at equal intervals in the circumferential direction are fixedly connected to the outer side surface of the sleeve 2, the second connecting blocks 9 are distributed with the first connecting blocks 6 in a staggered mode, the second connecting blocks 9 are inserted between the adjacent first connecting blocks 6, limiting grooves in limit fit with the limiting blocks 7 are formed in the limiting grooves of the second connecting blocks 9, the limiting blocks 7 are clamped into the limiting grooves of the second connecting blocks 9, the limiting blocks 9 are limited in position and are made of elastic materials, the limiting blocks 7 are used for increasing the contact area between the limiting blocks 7 and the second connecting blocks 9, the limiting blocks 9 are provided with second connecting blocks 9 which are in the limiting blocks which are matched with the limiting blocks, and the second connecting blocks 9 are inserted into the limiting grooves.
When the joint body 1 is used for connecting two sleeves 2, taking the sleeve 2 on the left side as an example, an operator firstly contacts the right side of the sleeve 2 with the left side of the internal thread of the joint body 1, at the moment, the right side of the fastening sleeve 4 contacts the left side of the external thread of the joint body 1, the second connecting block 9 is positioned between the adjacent first connecting blocks 6 and limited by the adjacent first connecting blocks, the states of the first connecting blocks 6 and the second connecting blocks 9 are shown in fig. 8, then the operator rotates the sleeve 2 by using a tool, the sleeve 2 rotates clockwise along the line of the internal thread of the joint body 1 and moves slowly to the right, the sleeve 2 drives the second connecting blocks 9 to rotate clockwise, and because the second connecting blocks 9 are positioned between the two first connecting blocks 6, the second connecting blocks 9 drive the first connecting blocks 6 to rotate clockwise, the first connecting blocks 6 drive the fastening sleeve 4 to rotate clockwise and move rightwards, the fastening sleeve 4 drives the extrusion ring 5 to be gradually close to the second sealing ring 301, and the same distance between the sleeve 2 and the sleeve 2 moves rightwards relative to the first connecting blocks 4 because the thread pitch of the external thread of the sleeve is smaller than that of the sleeve 2 moves rightwards, and the sleeve 4 rotates rightwards relative to the sleeve 2 is larger than the thread of the sleeve 2.
When the left side of second connecting block 9 and the right side of first connecting block 6 are parallel and level, fastening sleeve 4 and the cooperation of joint body 1 external screw thread are accomplished, sleeve pipe 2 and the cooperation of joint body 1 internal screw thread have not been accomplished yet, fastening sleeve 4 receives joint body 1 spacing no longer to move right, as sleeve pipe 2 continues clockwise rotation, sleeve pipe 2 drives second connecting block 9 clockwise rotation, when the left surface of second connecting block 9 and the arcwall face of stopper 7 contact, second connecting block 9 continues to rotate the arcwall face of extrusion stopper 7, stopper 7 receives the extrusion and begins to move left, first spring 8 is compressed, when the state that second connecting block 9 and first connecting block 6 show is as shown in fig. 7, first spring 8 resets and drives stopper 7 to move right and insert in the spacing groove of second connecting block 9, spacing bump 701 is spacing second connecting block 9, and lock second connecting block 9, avoid second connecting block 9 to take place anticlockwise rotation, simultaneously, second connecting block 9 carries out spacing to left first connecting block 6, avoid left first connecting block 6 to move left side first connecting block 6 to left side to right side 6, when second connecting block 9 carries out, sleeve pipe 2 is installed to right side 2 is avoided, the moment, the indirect connection of right side 2 is installed to the side to the right side of connecting block 6.
In the process that the sleeve 2 moves rightwards, the right side face of the sleeve 2 is in contact with the first sealing ring 3, the tightness between the sleeve 2 and the joint body 1 is improved, an arc face is arranged on one side, close to the first sealing ring 3, of the sleeve 2, the arc face of the sleeve 2 is clamped into the left side of the first sealing ring 3, the right side of the sleeve 2 is wrapped by the first sealing ring 3, the contact area between the sleeve 2 and the first sealing ring 3 is increased, the tightness between the sleeve 2 and the joint body 1 is further improved, and leakage of petroleum from between the sleeve 2 and the joint is avoided.
In the process that the sleeve 2 moves rightwards, because the inner diameter of the second sealing ring 301 is larger than the outer diameter of the thread of the sleeve 2, when the sleeve 2 moves rightwards, the thread on the sleeve 2 is not in contact with the second sealing ring 301, friction is avoided from being generated when the sleeve 2 moves rightwards, when the reducing part 201 of the sleeve 2 is in contact with the inner annular surface of the second sealing ring 301, the sleeve 2 continues to move rightwards, because the material of the second sealing ring 301 is elastic material, the inner annular surface of the second sealing ring 301 is extruded, the second sealing ring 301 deforms, when the annular groove of the sleeve 2 is aligned with the second sealing ring 301, the second sealing ring 301 is restored to deform, the inner annular surface of the second sealing ring 301 is clamped into the annular groove of the sleeve 2, at the moment, the second sealing ring 301 clamped into the annular groove of the sleeve 2 is still in a deformed state, the deformed force of the second sealing ring 301 is used for extruding the annular groove of the sleeve 2, the sealing property between the second sealing ring 301 and the sleeve 2 is increased, in the process that the inner annular surface of the second sealing ring 301 is clamped into the annular groove of the sleeve 2, the fastening sleeve 4 drives the second sealing ring 301 to be extruded by the outer inclined surface 5, and the second sealing ring 301 is extruded by the outer inclined surface of the second sealing ring 301, and the right-side of the sleeve 301 is extruded by the second inclined surface 1, and the right-side inclined surface is extruded by the second sealing ring 301 is extruded, and the outer side of the sealing ring 301 is extruded by the sealing ring 301.
In the process of putting the sleeve 2 and the joint body 1 into an oil well, the sleeve 2 and the joint body 1 shake, so that the threaded connection of the sleeve 2 and the joint body 1 directly collides hard due to shaking, the left side and the right side of the threaded connection of the sleeve 2 are sealed through the first sealing ring 3 and the second sealing ring 301, and the tightness of the threaded connection of the sleeve 2 and the joint body 1 is improved.
Example 2
On the basis of the embodiment 1, as shown in fig. 4 and 9, the lubricating assembly is further provided with lubricating assemblies which are circumferentially equidistant and symmetrically distributed, the lubricating assemblies are circumferentially equidistant and symmetrically distributed on the joint body 1, the lubricating assemblies are used for lubricating the external threads of the sleeve 2 and the internal threads of the joint body 1, the sleeve 2 can smoothly enter the joint body 1, the lubricating assembly comprises a push plate 10, the joint body 1 is provided with an oil storage cavity 102, the oil storage cavity 102 consists of two cylindrical cavities with different diameters, the diameter of the cylindrical cavity on one side of the oil storage cavity 102 close to the inner wall of the joint body 1 is smaller than that of the cylindrical cavity on one side far away from the inner wall of the joint body 1, the push plate 10 is slidably connected in the oil storage cavity 102, lubricating oil is stored on one side of the push plate 10 close to the sleeve 2, a second spring 11 is fixedly connected between the push plate 10 and the joint body 1, the push plate 10 is connected with the sealing rod 12 in a penetrating sliding way, the sealing rod 12 is in sealing fit with one side of the oil storage cavity 102 far away from the inner wall of the joint body 1, the sealing rod 12 at the lower side moves downwards, the sealing between the sealing rod 12 and the oil storage cavity 102 is released, the second spring 11 in a compressed state is reset, the push plate 10 pushes out lubricating oil in the oil storage cavity 102, the threaded connection part between the sleeve 2 and the joint body 1 is lubricated, one side of the sealing rod 12 far away from the push plate 10 is in a spherical shape, one side of the oil storage cavity 102 close to the inner wall of the joint body 1 is in sealing fit with the spherical part of the sealing rod 12, the contact area between the sealing rod 12 and the oil storage cavity 102 is increased, the sealing property between the sealing rod 12 and the upper part of the oil storage cavity 102 is improved, the lubricating oil in the oil storage cavity 102 is prevented from leaking, a third spring 13 is fixedly connected between the sealing rod 12 and the joint body 1, the spring constant of the third spring 13 is greater than the spring constant of the second spring 11.
When the sleeve 2 is not installed, an operator fills the oil storage cavity 102 with lubricating oil, and the oil storage cavity 102 at the lower side is taken as an example, and the specific operation is as follows: an operator firstly communicates a lubricating oil pipeline with the upper end of the oil storage cavity 102, then lubricating oil is introduced into the lubricating oil pipeline, the pressure in the lubricating oil pipeline is increased, the upper side of the spherical part of the sealing rod 12 moves downwards under pressure, the third spring 13 is compressed, the lubricating oil in the lubricating oil pipeline enters the oil storage cavity 102 through a gap between the spherical part of the sealing rod 12 and the oil storage cavity 102, the pressure in the oil storage cavity 102 is increased, the upper surface of the push plate 10 starts to move downwards under pressure increase, the second spring 11 is compressed, after the lubricating oil in the oil storage cavity 102 is filled, the third spring 13 is reset preferentially because the elastic coefficient of the third spring 13 is larger than the elastic coefficient of the second spring 11, the third spring 13 drives the sealing rod 12 to move upwards to seal the upper part of the oil storage cavity 102, the upper part of the sealing rod 12 is set to be spherical, the contact area between the upper part of the sealing rod 12 and the upper part of the oil storage cavity 102 is increased, the sealing property between the sealing rod 12 and the upper part of the oil storage cavity 102 is improved, and the lubricating oil in the oil storage cavity 102 is prevented from leaking.
In order to facilitate the sleeve 2 to smoothly enter the joint body 1, the threaded connection part of the sleeve 2 and the joint body 1 is lubricated, and the concrete operation is as follows: in the rightward moving process of the sleeve 2, the right part of the outer side surface of the sleeve 2 is in contact with the spherical part of the sealing rod 12, taking the sealing rod 12 at the lower side as an example, the spherical part of the sealing rod 12 starts to move downwards when being extruded by the sleeve 2, the third spring 13 is compressed, the sealing between the spherical part of the sealing rod 12 and the oil storage cavity 102 is released, the second spring 11 in a compressed state is reset, the second spring 11 drives the push plate 10 to move upwards, the push plate 10 extrudes lubricating oil in the oil storage cavity 102 to enter the threaded connection part of the sleeve 2 and the joint body 1, so that the threaded connection part of the sleeve 2 moving rightward and the joint body 1 is filled with lubricating oil, abrasion between the sleeve 2 and the joint body 1 is reduced, and the sleeve 2 can smoothly enter the joint body 1 conveniently.
Example 3
On the basis of embodiment 2, as shown in fig. 1, the oil well connector further comprises a protection component for protecting the connector body 1, the protection component is arranged on the fastening sleeve 4, the protection component comprises symmetrically distributed fixing rings 14, the symmetrically distributed fixing rings 14 are respectively connected with the adjacent fastening sleeve 4 in a rotating mode, equidistant elastic sheets 15 are hinged between the symmetrically distributed fixing rings 14, the two fixing rings 14 are mutually close to enable two sides of the elastic sheets 15 to be extruded, the elastic sheets 15 deform, the middle portions of the elastic sheets 15 are far away from the connector body 1 and protrude outwards, the elastic sheets 15 collide with an oil well, the elastic sheets 15 deform to buffer collision force, the thickness of the middle portions of the elastic sheets 15 is larger than that of the two sides of the elastic sheets, frequent deformation of the elastic sheets 15 is avoided, fatigue damage to the middle portions of the elastic sheets 15 is caused, and the elastic performance of the elastic sheets is reduced.
Because the external diameter of the joint body 1 is larger than the external diameter of the sleeve 2, the joint body 1 can collide with the inner wall of the oil well preferentially in the process of putting the sleeve 2 and the joint body 1 into the oil well, so that the joint body 1 is damaged, and the collision can transfer vibration to the threaded connection part of the joint body 1 and the sleeve 2 to influence the sealing between the joint body 1 and the sleeve 2, the joint body 1 needs to be protected in order to prevent the joint body 1 from being damaged, and the concrete operation is as follows: in the process that two sleeves 2 are screwed into the joint body 1, the two fastening sleeves 4 drive the fixing rings 14 on the two fastening sleeves to be close to each other, the two fixing rings 14 enable two sides of the elastic sheet 15 to be extruded, the elastic sheet 15 deforms, the middle of the elastic sheet 15 is far away from the joint body 1 and protrudes outwards, the three elastic sheets 15 are in an expansion state, the elastic sheet 15 can collide with the inner wall of an oil well preferentially, the elastic sheet 15 deforms to buffer the collision force, the collision force is weakened, the shaking amplitude of the joint body 1 is reduced, the joint body 1 is protected, the joint body 1 is prevented from shaking greatly, the tightness between the joint body 1 and the sleeve 2 is reduced, the thickness of the middle of the elastic sheet 15 is larger than the thickness of two sides of the joint body, the elastic sheet 15 is prevented from being deformed frequently, fatigue damage occurs at the middle of the elastic sheet, the elastic sheet 15 is reduced, and when the sleeve 2 is not installed, the three elastic sheets 15 are in a compression state and cannot deform.
While the invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims (9)
1. The utility model provides a high leakproofness petroleum casing pipe joint with self-locking function, is provided with the internal thread of symmetric distribution including joint body (1), and the internal thread department threaded connection of joint body (1) has sleeve pipe (2), characterized by: the connector comprises a connector body (1), wherein first sealing rings (3) which are symmetrically distributed are fixedly connected to the connector body (1), the first sealing rings (3) are made of elastic materials, an arc-shaped surface is arranged on one side, close to the first sealing rings (3), of a sleeve (2), the first sealing rings (3) are in sealing fit with the arc-shaped surfaces of adjacent sleeves (2), the connector body (1) is provided with sealing mechanisms which are symmetrically distributed, the connector body (1) and the sleeve (2) are further sealed by the sealing mechanisms, the first sealing rings (3) are extruded by the sleeve (2) to deform, and the contact area between the sleeve (2) and the first sealing rings (3) is increased;
the sealing mechanism comprises a second sealing ring (301), the sleeve (2) is provided with a reducing part (201), the second sealing ring (301) is arranged on one side of the joint body (1) located on the reducing part (201), the second sealing ring (301) is made of elastic materials, the inner diameter of the second sealing ring (301) is larger than that of the thread of the sleeve (2), the joint body (1) is provided with symmetrically distributed external threads, the pitch of the external threads of the joint body (1) is smaller than that of the internal threads of the joint body, the outer threads of the joint body (1) are connected with a fastening sleeve (4), the fastening sleeve (4) is fixedly connected with an extrusion ring (5) matched with the second sealing ring (301), the outer annular surface of the second sealing ring (301) is provided with symmetrically distributed inclined surfaces, the two ends of the joint body (1) are provided with first extrusion inclined surfaces (101), the extrusion ring (5) is provided with second extrusion inclined surfaces (501), one inclined surface of the second sealing ring (301) is matched with the first extrusion inclined surfaces (101), the other inclined surface of the second sealing ring (301) is matched with the second extrusion inclined surfaces (501), and the fastening sleeve (4) is provided with the second extrusion inclined surfaces (501).
2. A high tightness petroleum casing joint with self-locking function according to claim 1, characterized in that: the inner annular surface of the second sealing ring (301) is provided with an annular bulge, and the sleeve (2) is provided with an annular groove matched with the annular bulge of the second sealing ring (301) for increasing the contact area between the second sealing ring (301) and the sleeve (2).
3. A high tightness petroleum casing joint with self-locking function according to claim 2, characterized in that: the locking assembly comprises first connecting blocks (6) which are distributed at equal intervals in the circumferential direction, the first connecting blocks (6) which are distributed at equal intervals are fixedly connected to one side, away from the joint body (1), of the fastening sleeve (4), limiting blocks (7) are connected in a sliding mode in the first connecting blocks (6), first springs (8) are fixedly connected between the limiting blocks (7) and the first connecting blocks (6), arc-shaped surfaces are arranged on the limiting blocks (7), second connecting blocks (9) which are distributed at equal intervals in the circumferential direction are fixedly connected to the sleeve (2), the second connecting blocks (9) are distributed with the first connecting blocks (6) in a staggered mode, and limiting grooves which are in limiting fit with the limiting blocks (7) are formed in the second connecting blocks (9).
4. A high tightness petroleum casing joint with self-locking function according to claim 3, characterized in that: the limiting block (7) is made of elastic materials and used for increasing the contact area between the limiting block (7) and the second connecting block (9).
5. A high tightness petroleum casing joint with self-locking function according to claim 4, characterized in that: the limiting block (7) is provided with a limiting protrusion (701) in limiting fit with a limiting groove of the second connecting block (9) and is used for locking the second connecting block (9).
6. A high tightness petroleum casing joint with self-locking function according to claim 1, characterized in that: the lubricating assembly is used for lubricating external threads of the sleeve (2) and internal threads of the joint body (1), the lubricating assembly comprises a push plate (10), the joint body (1) is provided with an oil storage cavity (102), the push plate (10) is slidably connected in the oil storage cavity (102), lubricating oil is stored on one side, close to the sleeve (2), of the push plate (10), a second spring (11) is fixedly connected between the push plate (10) and the joint body (1), a sealing rod (12) in sealing fit with the oil storage cavity (102) is fixedly connected between the sealing rod (12) and the joint body (1), and the elastic coefficient of the third spring (13) is larger than that of the second spring (11).
7. A high tightness petroleum casing joint with self-locking function according to claim 6, characterized in that: one side of the sealing rod (12) far away from the push plate (10) is spherical, and one side of the oil storage cavity (102) close to the inner wall of the joint body (1) is in sealing fit with the spherical part of the sealing rod (12) so as to increase the contact area between the sealing rod (12) and the oil storage cavity (102).
8. A high tightness petroleum casing joint with self-locking function according to claim 2, characterized in that: the protection assembly is arranged on the fastening sleeve (4), and comprises symmetrically distributed fixing rings (14), wherein the symmetrically distributed fixing rings (14) are respectively connected to the adjacent fastening sleeve (4) in a rotating mode, and equidistant elastic pieces (15) are hinged between the symmetrically distributed fixing rings (14).
9. A high tightness petroleum casing joint with self-locking function according to claim 8, characterized in that: the thickness of the middle part of the elastic sheet (15) is larger than that of the two sides of the elastic sheet, so that the service life of the elastic sheet (15) is prolonged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310542708.9A CN116398060B (en) | 2023-05-15 | 2023-05-15 | High leakproofness petroleum casing pipe joint with self-locking function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310542708.9A CN116398060B (en) | 2023-05-15 | 2023-05-15 | High leakproofness petroleum casing pipe joint with self-locking function |
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| CN116398060A true CN116398060A (en) | 2023-07-07 |
| CN116398060B CN116398060B (en) | 2023-08-18 |
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| CN202310542708.9A Active CN116398060B (en) | 2023-05-15 | 2023-05-15 | High leakproofness petroleum casing pipe joint with self-locking function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578120A (en) * | 2024-01-12 | 2024-02-20 | 泰州市航宇电器有限公司 | Detachable connector with multiple sealing functions |
| CN117738592A (en) * | 2024-02-21 | 2024-03-22 | 胜利油田胜机石油装备有限公司 | Electroplating anti-corrosion oil pipe with sealing structure |
| CN117759201A (en) * | 2024-02-22 | 2024-03-26 | 胜利油田胜机石油装备有限公司 | Airtight heat-insulating pipe with port protection function |
| CN117803329A (en) * | 2024-03-01 | 2024-04-02 | 胜利油田胜机石油装备有限公司 | Electroplating anti-corrosion heat-insulation oil pipe with guiding buckle structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578120A (en) * | 2024-01-12 | 2024-02-20 | 泰州市航宇电器有限公司 | Detachable connector with multiple sealing functions |
| CN117578120B (en) * | 2024-01-12 | 2024-05-03 | 泰州市航宇电器有限公司 | Detachable connector with multiple sealing functions |
| CN117738592A (en) * | 2024-02-21 | 2024-03-22 | 胜利油田胜机石油装备有限公司 | Electroplating anti-corrosion oil pipe with sealing structure |
| CN117738592B (en) * | 2024-02-21 | 2024-04-16 | 胜利油田胜机石油装备有限公司 | Electroplating anti-corrosion oil pipe with sealing structure |
| CN117759201A (en) * | 2024-02-22 | 2024-03-26 | 胜利油田胜机石油装备有限公司 | Airtight heat-insulating pipe with port protection function |
| CN117759201B (en) * | 2024-02-22 | 2024-04-16 | 胜利油田胜机石油装备有限公司 | Airtight heat-insulating pipe with port protection function |
| CN117803329A (en) * | 2024-03-01 | 2024-04-02 | 胜利油田胜机石油装备有限公司 | Electroplating anti-corrosion heat-insulation oil pipe with guiding buckle structure |
| CN117803329B (en) * | 2024-03-01 | 2024-05-17 | 胜利油田胜机石油装备有限公司 | Electroplating anti-corrosion heat-insulation oil pipe with guiding buckle structure |
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|---|---|
| CN116398060B (en) | 2023-08-18 |
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