CN114233236B - Sucker rod blowout prevention box - Google Patents
Sucker rod blowout prevention box Download PDFInfo
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- CN114233236B CN114233236B CN202111656427.3A CN202111656427A CN114233236B CN 114233236 B CN114233236 B CN 114233236B CN 202111656427 A CN202111656427 A CN 202111656427A CN 114233236 B CN114233236 B CN 114233236B
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- 230000002265 prevention Effects 0.000 title claims abstract description 16
- 241000237983 Trochidae Species 0.000 claims abstract description 63
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 claims description 16
- 230000033228 biological regulation Effects 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 48
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 241001023788 Cyttus traversi Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a blowout prevention box of a sucker rod, which comprises a top shell, a regulating valve component, a first valve seat, a second valve seat and a regulating screw thread, wherein the top shell is provided with a containing cavity and a first through hole communicated with the containing cavity, an internal thread is arranged in the containing cavity, an external thread is arranged on the outer side wall of the regulating screw thread, the regulating screw thread is inserted into the containing cavity and is in threaded connection with the containing cavity, the top shell and the regulating screw thread are enclosed into a containing bin, the first valve seat, the second valve seat and the regulating valve component are all positioned in the containing cavity, the first valve seat is fixed on the top shell, the second valve seat is fixed on the regulating screw thread, the regulating valve component is spherical, the regulating valve component is clamped between the first valve seat and the second valve seat, and the first valve seat, the regulating valve component, the second valve seat and the regulating screw thread are respectively and vertically provided with a second through hole, a guide hole, a third through hole and a guide hole in a penetrating way, when the second valve seat is worn, the top shell is rotated, so that the top shell, the first valve seat, the regulating valve component, the second valve seat and the regulating screw thread are continuously in a sealing state. The sucker rod blowout prevention box has long service life.
Description
Technical Field
The invention relates to the technical field of blowout prevention of oil wells, in particular to a blowout prevention box of a sucker rod.
Background
The existing blowout prevention box on the market is of a fixed integrated structure, a sealing element in the blowout prevention box is made of traditional rubber products, the sucker rod is of a typical slender shaft structure, the diameter of the sucker rod is phi 28mm, the stroke length is larger than or equal to 6m, and the sucker rod can swing to different degrees when reciprocating under the working state.
However, because the position of the sealing element can not be adjusted, the swinging can cause the sealing element to be seriously deviated and worn, the service life can be reduced to 700 hours which is extremely short, the installation and the replacement of the sealing element are frequent and time-consuming, the production is stopped and the replacement is stopped, great economic loss is caused, and the use cost of the blowout preventer is high.
Disclosure of Invention
The invention aims to provide a sucker rod blowout prevention box, which solves the technical problems that in the prior art, reciprocating motion of a sucker rod can generate swing of different degrees, the position of a sealing element cannot be adjusted, so that the sealing element is seriously deviated and worn, the service life is shortened, the sealing element is frequently installed and replaced and consumes time, production is stopped and replaced, great economic loss can be caused, and the use cost of the blowout prevention box is high.
The invention provides a sucker rod blowout prevention box which comprises a top shell, a regulating valve component, a first valve seat, a second valve seat and a regulating screw thread, wherein the regulating screw thread is used for being installed at an oil-gas wellhead, the top shell is provided with an accommodating cavity and a first through hole communicated with the accommodating cavity, an inner wall of one end, far away from the first through hole, of the accommodating cavity is provided with an inner thread, the outer side wall of the regulating screw thread is provided with an outer thread, the regulating screw thread is inserted into the accommodating cavity and is in threaded connection with the inner thread through the outer thread, the top shell and the regulating screw thread enclose a containing bin, the first valve seat, the second valve seat and the regulating valve component are all located in the accommodating cavity, the first valve seat is fixed on the top shell, the second valve seat is fixed on the adjusting screw thread, the adjusting valve assembly is spherical, the adjusting valve assembly is clamped between the first valve seat and the second valve seat, the first valve seat, the adjusting valve assembly, the second valve seat and the adjusting screw thread respectively vertically penetrate through a second perforation, a guide hole, a third perforation and a guide hole, the first perforation, the second perforation, the guide hole, the third perforation and the guide hole are sequentially communicated, and when the first valve seat or the second valve seat is worn, the top shell, the first valve seat, the adjusting valve assembly, the second valve seat and the adjusting screw thread can be continuously in a sealing state by continuously rotating the top shell.
Further, the topshell includes the roof of circular setting, certainly annular bounding wall and the annular setting that the edge of roof is buckled and is extended are in order to be used for the restriction adjust the rotatory spacing arch of screw thread, first perforation run through in the roof setting, the roof with the annular bounding wall encloses synthetically the chamber that holds, the internal thread with spacing arch is all located on the inner wall of annular bounding wall, annular spacing arch be located the internal thread with between the roof, spacing arch with be equipped with the interval between the regulation screw thread.
Further, adjust the screw thread and include annular side plate, protruding locating annular base station on the annular side plate lateral wall and protruding locating annular extension board on the annular side plate inside wall, annular extension board will first draw-in groove is separated into to the annular side plate and with the second draw-in groove that first draw-in groove set up back to the back, the second valve base is fixed in the first draw-in groove, the annular extension board has the fourth perforation, the fourth perforation with the second draw-in groove constitutes the induction hole, the external screw thread is located on the lateral wall of annular side plate, the annular base station extremely interval between the annular bounding wall is greater than spacing arch extremely interval between the annular side plate.
Furthermore, the regulating valve assembly comprises a valve core and a plurality of sealing rings, the valve core is spherical, the valve core is clamped between the first valve seat and the second valve seat, a fifth through hole penetrates through the valve core, one end of the fifth through hole is communicated with the second through hole, the other end of the fifth through hole is communicated with the third through hole, a plurality of first annular grooves are concavely arranged on the inner wall of the fifth through hole, the sealing rings are installed in the first annular grooves, the distance between the annular base platform and the annular enclosing plate is larger than the distance between the valve core and the annular supporting plate, and the distance between the valve core and the annular supporting plate is larger than the distance between the limiting protrusion and the annular side plate.
Furthermore, the governing valve subassembly still includes a plurality of rings and a plurality of dust ring of leading, the fenestrate inner wall of fifth still is equipped with a plurality of second ring grooves and a plurality of third ring channel of concave, lead ring and dust ring install respectively in second ring channel and the third ring channel, the inner circle of sealing washer, the inner circle of leading ring, the inner circle of dust ring and fifth perforation constitute jointly the guiding hole.
Furthermore, two flat wall surfaces which are arranged oppositely are arranged at two ends of the valve core, the fifth through hole penetrates from one flat wall surface to the other flat wall surface, the structures of the first valve seat and the second valve seat are the same, the flat wall surfaces are of circular structures, the inner diameter of the second through hole is smaller than the outer diameter of the flat wall surfaces, and the inner diameter of the second through hole is larger than the inner diameter of the fifth through hole.
Furthermore, the first valve seat and the second valve seat are both concavely provided with arc-shaped surfaces matched with the valve core.
Further, high-strength wear-resistant and corrosion-resistant carbon powder is added into the sealing ring.
Further, the sucker rod blowout prevention box further comprises a flat pad used for being abutted to an oil gas well mouth, a positioning groove is concavely arranged on the inner wall of the second clamping groove, the flat pad is clamped into the positioning groove and abutted to the annular support plate, the flat pad is annular, and the inner diameter of the flat pad is larger than that of the fourth through hole.
Further, the inner diameter of the first bore is equal to the inner diameter of the second bore.
Compared with the prior art, the invention has the beneficial effects that:
the spherical regulating valve assembly is adopted in the sucker rod blowout preventing box, the regulating valve assembly can synchronously swing along with the sucker rod within a certain range, the position of the regulating valve assembly can be regulated, the eccentric abrasion of a sealing ring in the regulating valve assembly is avoided, the service life of the sealing ring is prolonged, and the sealing ring does not need to be frequently replaced;
in the normal use process, when the sucker rod blowout preventing box works for a period of time and the first valve seat or the second valve seat is slightly worn, the top shell is rotated firstly to enable the first valve seat to move downwards, the top shell, the first valve seat, the regulating valve component, the second valve seat and the regulating screw thread are always in a sealing state, the top shell can be rotated in advance to prevent gaps from being formed between the first valve seat and the regulating valve component and between the second valve seat and the regulating valve component, oil leakage is avoided, the service life of the first valve seat and the second valve seat is prolonged, the whole sucker rod blowout preventing box does not need to be disassembled, the maintenance cost of the sucker rod blowout preventing box is reduced, the production stop replacement time is shortened, the service life of the sucker rod blowout preventing box can be prolonged by more than 10 times, and the use cost is low;
continue rotatory top shell, when annular curb plate butt in the regulation screw thread when spacing protruding, top shell will unable continuation rotation, at this moment, there is first disk seat separation between governing valve subassembly and the top shell, there is second disk seat separation between governing valve subassembly and the regulation screw thread, effectively avoid governing valve subassembly direct action to push up the shell and adjust the screw thread, avoid wearing and tearing between the spare part, and the structural design of adjusting the screw thread can guarantee that governing valve subassembly is at the swing in-process, make corresponding sealing member be difficult for shifting, remain encapsulated situation all the time.
Drawings
FIG. 1 is a schematic structural view of a sucker rod blowout preventer cartridge according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along A-A in FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at B;
FIG. 4 is an exploded view of FIG. 1;
FIG. 5 is a schematic structural diagram of a top case according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;
FIG. 7 is a schematic structural diagram of an adjusting screw according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view taken along line D-D of FIG. 7;
FIG. 9 is a schematic structural diagram of a regulator valve assembly according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view taken along line E-E of FIG. 9;
FIG. 11 is an exploded view of FIG. 9;
FIG. 12 is a schematic structural diagram of a valve cartridge provided in an embodiment of the present invention;
fig. 13 is a sectional view taken along F-F in fig. 12.
In the figure:
10. a top shell; 11. an accommodating chamber; 12. a first perforation; 13. a top plate; 131. a third card slot; 14. an annular coaming; 15. a limiting bulge; 20. a regulator valve assembly; 21. a guide hole; 22. a valve core; 221. a fifth perforation; 222. a first annular groove; 223. a second annular groove; 224. a third annular groove; 225. a flat wall surface; 23. a seal ring; 24. a pilot ring; 25. a dust ring; 30. a first valve seat; 31. a second perforation; 40. a second valve seat; 41. a third perforation; 42. an arc-shaped surface; 50. adjusting the screw thread; 51. an introduction hole; 52. an annular side plate; 53. an annular base station; 54. an annular support plate; 541. a fourth perforation; 55. a first card slot; 56. a second card slot; 561. positioning a groove; 60. an accommodating bin; 70. and (7) flattening the cushion.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Referring to fig. 1 to 6, the embodiment of the invention discloses a sucker rod blowout preventer, which comprises a top shell 10, an adjusting valve assembly 20, a first valve seat 30, a second valve seat 40 and an adjusting screw thread 50, wherein the adjusting screw thread 50 is used for being installed at an oil-gas well mouth, and the adjusting screw thread 50 is fixed and does not rotate.
The first valve seat 30 and the second valve seat 40 are both annular, the first valve seat 30, the second valve seat 40 and the regulator valve assembly 20 are all located in the housing chamber 11, the first valve seat 30 is fixed to the top case 10, the second valve seat 40 is fixed to the regulating screw 50, and the distance between the first valve seat 30 and the second valve seat 40 can be shortened by rotating the top case 10.
The adjusting valve assembly 20 is spherical, the adjusting valve assembly 20 is clamped between a first valve seat 30 and a second valve seat 40, the adjusting valve assembly 20 can rotate relative to the first valve seat 30 and the second valve seat 40, the first valve seat 30, the adjusting valve assembly 20 and the second valve seat 40 are respectively vertically provided with a second perforation 31, a guide hole 21 and a third perforation 41 in a penetrating mode, a first perforation 12, a second perforation 31, a guide hole 21, a third perforation 41 and an introduction hole 51 are sequentially arranged in a communicating mode from top to bottom, one end of the adjusting valve assembly 20 extends into the second perforation 31, the other end of the adjusting valve assembly 20 extends into the third perforation 41, the inner diameter of the first perforation 12 is equal to that of the second perforation 31, of course, the inner diameter of the first perforation 12 can also be larger than that of the second perforation 31, the inner diameter of the guide hole 21 is the smallest, when a sucker rod sequentially passes through the introduction hole 51, the third perforation 41, the guide hole 21, the second perforation 31 and the first perforation 12, the sucker rod is restrained on the guide hole 21 and is in sliding connection with the guide hole 21, when the sucker rod sequentially passes through the guide hole, the adjusting valve assembly 20, the sucker rod is driven to swing, the adjusting valve assembly is installed in a range of a swing angle which the sucker rod can be controlled by a float-swing horse head, and the sucker rod assembly 20, the sucker rod assembly can be controlled by a float in a float angle range which the range of a float-swing horse head which the sucker rod swing machine.
Because the sucker rod blowout preventer is vertically arranged, the gravity of the regulating valve assembly 20 and the acting force of the sucker rod need to be considered, therefore, the abrasion degree of the second valve seat 40 is higher than that of the first valve seat 30, and after the second valve seat 40 is abraded, the top shell 10, the first valve seat 30, the regulating valve assembly 20, the second valve seat 40 and the regulating screw thread 50 can be continuously in a sealing state by continuously rotating the top shell 10.
It should be noted that the sucker rod blowout preventer of the present invention is mainly based on prevention, that is, the wear time of the first valve seat 30 and the second valve seat 40 is firstly measured through a plurality of experimental records, after the sucker rod blowout preventer is used for a period of time, when the first valve seat 30 and the second valve seat 40 are slightly worn, the top shell 10, the first valve seat 30, the regulating valve assembly 20, the second valve seat 40 and the regulating screw 50 can be continuously in a sealed state by rotating the top shell 10 in advance, so as to prevent gaps from occurring between the first valve seat 30 and the regulating valve assembly 20 and between the second valve seat 40 and the regulating valve assembly 20, and avoid oil leakage, and the top shell 10 cannot be rotated after the oil leaks from the first through hole 12.
If the oil liquid enters between the top shell 10 and the regulating valve assembly 20 and leaks from the first through hole 12, the top shell 10 can be continuously rotated, so that the top shell 10, the first valve seat 30, the regulating valve assembly 20, the second valve seat 40 and the regulating screw thread 50 are continuously in a sealing state, the leaked oil liquid is limited, if the top shell 10 is not rotated, or the oil liquid still leaks after the rotation, the first valve seat 30 and the second valve seat 40 need to be replaced, if the top shell 10 needs to be cleaned, the top shell 10 can be rotated in the opposite direction, the top shell 10 is detached, the top shell 10 is screwed after the oil liquid is removed, and the operation is carried out in a stop state.
The top shell 10 includes the roof 13 of circular setting, the annular bounding wall 14 that extends and the spacing arch 15 of annular setting from the edge bending of roof 13, first perforation 12 runs through in roof 13 setting, roof 13 encloses with annular bounding wall 14 and synthesizes and above-mentioned hold the chamber 11, internal thread and spacing arch 15 are all located on the inner wall of annular bounding wall 14, annular spacing arch 15 is located between internal thread and roof 13 and is close to the internal thread setting, be equipped with interval M between spacing arch 15 and the regulation screw thread 50 to as the adjustment clearance between regulation screw thread 50 and the top shell 10, spacing arch 15 is used for restricting the regulation screw thread 50 and continues rotatory the rising, when the distance between first disk seat 30 and the second disk seat 40 needs to be adjusted, interval M between accessible spacing arch 15 and the regulation screw thread 50 carries out the fine setting.
Referring to fig. 7 to 8, in the present embodiment, the adjusting screw 50 includes an annular side plate 52, an annular base 53 protruding on an outer side wall of the annular side plate 52, and an annular support plate 54 protruding on an inner side wall of the annular side plate 52, the annular support plate 54 divides the annular side plate 52 into a first slot 55 and a second slot 56 opposite to the first slot 55, cross sections of the first slot 55 and the second slot 56 are both "L", the second valve seat 40 is fixed in the first slot 55, the annular support plate 54 has a fourth through hole 541, the fourth through hole 541 and the second slot 56 form the above-mentioned introducing hole 51, the external thread is arranged on the outer side wall of the annular side plate 52, a distance between the limiting protrusion 15 and the annular side plate 52 is the above-mentioned M, and a distance S between the annular base 53 and the annular shroud plate 14 is greater than a distance M between the limiting protrusion 15 and the annular side plate 52, so that after the top case 10 is rotated, a locking phenomenon between the top case 10 and the adjusting screw 50 can be effectively avoided.
Referring to fig. 9 to 13, the adjusting valve assembly 20 includes a valve core 22 and a plurality of sealing rings 23, the valve core 22 is in a spherical shape, the valve core 22 is clamped between a first valve seat 30 and a second valve seat 40, the valve core 22 is a component for sealing the sucker rod blowout preventer box by matching the first valve seat 30, the second valve seat 40 and the sealing rings 23, the valve core 22 is vertically provided with a fifth through hole 221 in a penetrating manner, one end of the fifth through hole 221 is communicated with the second through hole 31, the other end of the fifth through hole is communicated with a third through hole 41, a plurality of first annular grooves 222 are concavely formed on the inner wall of the fifth through hole 221, the inner diameter of the fifth through hole 221 is smaller than the inner diameter of the first through hole 12, the sealing rings 23 are installed in the first annular grooves 222, and the sealing rings 23 are used for sealing between the valve core 22 and the sucker rod to prevent oil from penetrating through a gap between the sucker rod and the valve core 22.
The distance S between the annular base 53 and the annular surrounding plate 14 is larger than the distance K between the valve core 22 and the annular supporting plate 54, the distance K between the valve core 22 and the annular supporting plate 54 is larger than the distance M between the limiting protrusion 15 and the annular side plate 52, after the top shell 10 is rotated, because the value of M is minimum, only the limiting protrusion 15 and the annular side plate 52 are in contact, when the limiting protrusion 15 is in contact with the annular side plate 52, the top shell 10 cannot rotate any more, the second valve seat 40 cannot be continuously worn, the valve core 22 and the annular supporting plate 54 are still connected through the second valve seat 40, the valve core 22 is effectively prevented from directly acting on the second valve seat 40, the wear degree of the first valve seat 30 is not high, even if the wear occurs, the wear amount can be summarized into the distance M between the limiting protrusion 15 and the annular side plate 52, and the distances S, K and M are vertical distances.
In a preferred embodiment, the adjusting valve assembly 20 further includes a plurality of guide rings 24 and a plurality of dust rings 25, the inner wall of the fifth through hole 221 is further concavely provided with a plurality of second annular grooves 223 and a plurality of third annular grooves 224, the guide rings 24 and the dust rings 25 are respectively installed in the second annular grooves 223 and the third annular grooves 224, the guide rings 24 are used for keeping the sucker rod and the valve core 22 concentrically arranged, the dust rings 25 are used for preventing environmental impurities such as external dust from damaging the sealing ring 23, and the inner ring of the sealing ring 23, the inner ring of the guide ring 24, the inner ring of the dust rings 25 and the fifth through hole 221 together form the above-mentioned guide hole 21.
As a preferred embodiment, the sealing ring 23 is made of a soft rubber material, high-strength wear-resistant and corrosion-resistant carbon powder is added into the sealing ring 23, the service life of the sealing ring 23 can reach 1000 hours, and the high-strength wear-resistant and corrosion-resistant carbon powder prolongs the service life of the sealing ring 23.
In this embodiment, the number and the installation position of the sealing rings 23, the centering rings 24 and the dust rings 25 may be set as required, preferably, the number of the dust rings 25 is one, the dust rings 25 are disposed at one end of the fifth through hole 221 away from the adjusting screw 50, the number of the sealing rings 23 is two, two sealing rings 23 are disposed in the middle of the fifth through hole 221, the number of the centering rings 24 is also two, one of the centering rings 24 is disposed between the sealing ring 23 and the dust ring 25, the other centering ring 24 is disposed at one end of the fifth through hole 221 close to the adjusting screw 50, and the two sealing rings 23 are disposed between the two centering rings 24.
The two ends of the valve core 22 are further provided with two flat wall surfaces 225 which are arranged oppositely, the fifth through hole 221 penetrates from one flat wall surface 225 to the other flat wall surface 225, the first valve seat 30 and the second valve seat 40 are identical in structure, the flat wall surfaces 225 are of a circular structure, the inner diameter of the second through hole 31 is smaller than the outer diameter of the flat wall surface 225, the inner diameter of the second through hole 31 is larger than the inner diameter of the fifth through hole 221, the valve core 22 can be fixed on a machine table board through the flat wall surfaces 225 for processing, and meanwhile, the two flat wall surfaces 225 arranged at the two ends of the valve core 22 can also rapidly and effectively remove impurities entering the fifth through hole 221.
In the invention, the top plate 13 is further concavely provided with a third clamping groove 131, the cross section of the third clamping groove 131 is also L-shaped, the first through hole 12 and the third clamping groove 131 are coaxially arranged, the first valve seat 30 is fixed in the third clamping groove 131, and the first valve seat 30 and the second valve seat 40 are both concavely provided with arc-shaped surfaces 42 matched with the valve core 22, so that the contact area between the first valve seat 30 and the regulating valve assembly 20 is increased, and good sealing is formed.
The sucker rod blowout prevention box further comprises a flat gasket 70 used for being abutted to an oil gas wellhead, a positioning groove 561 is concavely arranged on the inner wall of the second clamping groove 56, the flat gasket 70 is clamped in the positioning groove 561 and abutted to the annular support plate 54 to prevent the flat gasket 70 from falling off from the second clamping groove 56, the flat gasket 70 is annular, the inner diameter of the flat gasket 70 is larger than that of the fourth through hole 541, and the flat gasket 70 is used for sealing the oil gas wellhead connected with the flat gasket 70.
The working principle of the sucker rod blowout prevention box is as follows:
firstly, carrying out simulation experiments in a laboratory, calculating a wear time comparison table of the first valve seat 30 and the second valve seat 40, when the first valve seat 30 or the second valve seat 40 is slightly worn after the pumping unit works for a period of time, firstly rotating the top shell 10 to enable the first valve seat 30 to move downwards, and keeping the top shell 10, the first valve seat 30, the regulating valve assembly 20, the second valve seat 40 and the regulating screw thread 50 in a sealing state all the time, so as to avoid leakage of oil from a gap between the first valve seat 30 and the regulating valve assembly 20 or a gap between the first valve seat 30 and the regulating valve assembly 20;
if oil seeps from the first through hole 12, the top shell 10 can be continuously rotated after the machine is stopped, so that the top shell 10, the first valve seat 30, the regulating valve assembly 20, the second valve seat 40 and the regulating screw thread 50 are continuously in a sealed state, the leaked oil is limited, the situation is not needed, the oil cannot leak after the top shell 10 is screwed down, and the first valve seat 30 and the second valve seat 40 need to be replaced if the top shell 10 is not rotated or the oil still leaks after the top shell 10 is rotated;
if the leaked oil needs to be cleaned, the top shell 10 can be rotated in the opposite direction, the top shell 10 is disassembled, and the top shell 10 is screwed down after the oil is cleaned.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (9)
1. The utility model provides a sucker rod prevents spouting box which characterized in that, includes topshell, governing valve subassembly, first disk seat, second disk seat and is used for installing the regulation screw thread at oil gas wellhead department, the topshell have hold the chamber and with hold the first perforation of chamber intercommunication, the inner wall of keeping away from of holding the chamber first perforation one end is equipped with the internal thread, the lateral wall of adjusting the screw thread is equipped with the external screw thread, adjust the screw thread insert in hold the intracavity and through the external screw thread with internal thread looks threaded connection, the topshell with adjust the screw thread and enclose synthetic holding the storehouse, first disk seat, second disk seat and governing valve subassembly all are located hold the intracavity, the first valve seat is fixed on the top shell, the second valve seat is fixed on the adjusting screw thread, the adjusting valve assembly is spherical, the adjusting valve assembly is clamped between the first valve seat and the second valve seat, the first valve seat, the adjusting valve assembly, the second valve seat and the adjusting screw thread are respectively vertically provided with a second perforation, a guide hole, a third perforation and a leading-in hole in a penetrating mode, the first perforation, the second perforation, the guide hole, the third perforation and the leading-in hole are sequentially communicated, and when the first valve seat or the second valve seat is worn, the top shell, the first valve seat, the adjusting valve assembly, the second valve seat and the adjusting screw thread can be continuously in a sealing state by continuously rotating the top shell;
the topshell includes the roof of circular setting, certainly annular bounding wall and the annular setting of buckling the extension of the edge of roof are in order to be used for the restriction adjust the rotatory spacing arch of screw thread, first perforation run through in the roof setting, the roof with the annular bounding wall encloses synthetically the chamber holds, the internal thread with spacing arch is all located on the inner wall of annular bounding wall, the annular spacing arch is located the internal thread with between the roof, spacing arch with be equipped with the interval between the regulation screw thread.
2. The sucker rod blowout preventer according to claim 1, wherein the adjusting screw comprises a circular side plate, a circular base protruding from an outer side wall of the circular side plate, and a circular support plate protruding from an inner side wall of the circular side plate, the circular support plate divides the circular side plate into a first groove and a second groove opposite to the first groove, the second valve seat is fixed in the first groove, the circular support plate has a fourth through hole, the fourth through hole and the second groove form the introduction hole, the external thread is provided on an outer side wall of the circular side plate, and a distance from the circular base to the circular side plate is greater than a distance from the limiting protrusion to the circular side plate.
3. The sucker rod blowout preventer according to claim 2, wherein the regulator valve assembly comprises a valve core and a plurality of sealing rings, the valve core is spherical, the valve core is clamped between the first valve seat and the second valve seat, a fifth through hole penetrates through the valve core, one end of the fifth through hole is communicated with the second through hole, the other end of the fifth through hole is communicated with the third through hole, a plurality of first annular grooves are concavely formed in the inner wall of the fifth through hole, the sealing rings are installed in the first annular grooves, the distance between the annular base platform and the annular surrounding plate is greater than the distance between the valve core and the annular supporting plate, and the distance between the valve core and the annular supporting plate is greater than the distance between the limiting protrusion and the annular side plate.
4. The sucker rod blowout preventer of claim 3, wherein the regulator valve assembly further comprises a plurality of pilot rings and a plurality of dust rings, the inner wall of the fifth through hole is further concavely provided with a plurality of second annular grooves and a plurality of third annular grooves, the pilot rings and the dust rings are respectively installed in the second annular grooves and the third annular grooves, and the inner rings of the seal rings, the pilot rings, the dust rings and the fifth through hole together form the pilot hole.
5. The sucker rod blowout preventer of claim 3, wherein the spool further comprises two opposing flat walls at opposite ends thereof, the fifth through hole extends through the spool from one of the flat walls to the other of the flat walls, the first and second valve seats have the same configuration, the flat walls have a circular configuration, the second through hole has an inner diameter smaller than an outer diameter of the flat walls, and the second through hole has an inner diameter larger than an inner diameter of the fifth through hole.
6. The sucker rod blowout preventer of claim 5, wherein the first and second valve seats are each recessed with an arcuate surface that mates with the valve core.
7. The sucker rod blowout preventer of claim 3, wherein the seal ring is filled with high strength wear and corrosion resistant carbon powder.
8. The sucker rod blowout prevention box according to claim 2, further comprising a flat pad for abutting against an oil and gas well head, wherein a positioning groove is concavely formed in the inner wall of the second clamping groove, the flat pad is clamped in the positioning groove and abuts against the annular support plate, the flat pad is annular, and the inner diameter of the flat pad is larger than that of the fourth through hole.
9. The sucker rod blowout preventer of claim 1, wherein the first bore has an inner diameter that is equal to an inner diameter of the second bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111656427.3A CN114233236B (en) | 2021-12-30 | 2021-12-30 | Sucker rod blowout prevention box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111656427.3A CN114233236B (en) | 2021-12-30 | 2021-12-30 | Sucker rod blowout prevention box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114233236A CN114233236A (en) | 2022-03-25 |
| CN114233236B true CN114233236B (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111656427.3A Active CN114233236B (en) | 2021-12-30 | 2021-12-30 | Sucker rod blowout prevention box |
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| CN (1) | CN114233236B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4295529A (en) * | 1979-11-08 | 1981-10-20 | Strickland William N | Blow-out preventor |
| CN2220528Y (en) * | 1994-08-18 | 1996-02-21 | 戴秀芝 | Oil pumping rod sealing apparatus |
| GB0423016D0 (en) * | 2004-10-16 | 2004-11-17 | Enovate Systems Ltd | Blow out preventers |
| CN202520276U (en) * | 2012-04-06 | 2012-11-07 | 范海彬 | Multifunctional blowout control box blowout preventer |
| CN112177557B (en) * | 2020-11-25 | 2021-06-08 | 西南石油大学 | Remote automatic core changing and sealing real-time monitoring continuous pipe blowout prevention box |
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2021
- 2021-12-30 CN CN202111656427.3A patent/CN114233236B/en active Active
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| Publication number | Publication date |
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| CN114233236A (en) | 2022-03-25 |
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