CN101666218B - Double-sealing packing box for oil field wellhead and wellhead double-sealing method - Google Patents
Double-sealing packing box for oil field wellhead and wellhead double-sealing method Download PDFInfo
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- CN101666218B CN101666218B CN200810137041A CN200810137041A CN101666218B CN 101666218 B CN101666218 B CN 101666218B CN 200810137041 A CN200810137041 A CN 200810137041A CN 200810137041 A CN200810137041 A CN 200810137041A CN 101666218 B CN101666218 B CN 101666218B
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- pressure cap
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Abstract
The invention discloses a double-sealing packing box for an oil field wellhead and a wellhead double-sealing method. At present, domestic wellhead devices for pumping wells use mechanical dynamic sealing. The double-sealing packing box for the oil field wellhead comprises a steel cable end sealing piece (21) through which a steel cable (1) pass, the steel cable end sealing piece is connected with a packing box sealing device (22) which is connected with a large four-way (16), the lower end of an upper packing box inner pipe (17) of the packing box sealing device is connected with a packing box lower joint (20), a movable joint (14) used for fixing the steel cable is connected into the large four-way, and the movable joint is connected with a steel cable fixing head (13) and is connected with a movable joint sleeve (15) used for connecting a sucker rod. The double-sealing packing box for the oil field wellhead and the wellhead double-sealing method are used for sealing the wellhead of the pumping well.
Description
Technical field:
The present invention relates to a kind of oil well mouth device, the concrete method that relates to a kind of oil field shaft mouth double containment packing box and well head double containment.
Background technology:
Present domestic pumpingh well wellhead assembly uses mechanical dynamic seal, and promptly packing box is realized the sealing of polished rod (sucker rod), prevents the crude oil leakage.
Common packing box, its effect are polished rod is slided therein and to seal well head, and polished rod sealer is made up of top basin root box and bottom rubber gate.During normal the oil pumping, the rubber packing in the basin root box of top can play sealing blowout prevention effect; After bottom rubber gate is screwed, can under normal production conditions, safety change the rubber packing.But long stroke pumping unit adopts the length of stroke of common packing box relevant with the stroke of polished rod, can not reduce the height of oil pumper, has increased the manufacturing cost of oil pumper, the safety and the maintenance cost of maintenance.
Summary of the invention:
The purpose of this invention is to provide the method for a kind of oil field shaft mouth double containment packing box and well head double containment, adopted the inside and outside dual sealing, provide reliable sealing to guarantee when crossing packing box, can reduce the pumping unit shelf height for the wire rope that connects sucker rod.
Above-mentioned purpose realizes through following technical scheme:
Oil field shaft mouth double containment packing box; Its composition comprises: the steel cord ends seal that supplies wire rope to penetrate; Described steel cord ends seal connects the packing box sealing device; Described packing box sealing device connects big four, and the pipe lower end connects the packing box lower contact in the last packing box that described packing box sealing device is had, and connects the movable joint that is used for fixing wire rope in the described big four; Described movable joint connects the fixation with steel wire head, and described movable joint connects the loose joint headgear that is used to connect sucker rod.
Described oil field shaft mouth double containment packing box; Described steel cord ends seal comprises the wire rope packing; Described wire rope packing connects the wire rope pressure cap, and described wire rope pressure cap, wire rope packing external seal lock sleeve, described lock sleeve connect the locking slips.
Described oil field shaft mouth double containment packing box; Described packing box sealing device comprises the packing axle sleeve; Described packing axle sleeve stretches into described lock sleeve and connects the locking slips, and described packing axle sleeve connects the packing pressure cap, and described packing axle sleeve, packing pressure cap are connected with packing jointly; Described packing pressure cap is connected the described pipe in the packing box of going up with packing, described going up in the packing box is with joint ring on the pipe; Described going up managed the big packing of connection in the packing box, described big packing connects big packing gland, and described big packing gland connects big packing pressure cap.
The method of oil field shaft mouth double containment; Through wire rope pressure cap, wire rope packing, lock sleeve, locking slips with wire rope external surface fixing seal; To lock slips, packing axle sleeve, packing pressure cap and packing through described lock sleeve and connect as one, form the outside movable sealing of wire rope assembly; Described fixation with steel wire head is fixed on wire rope in the movable joint, and described loose joint headgear and sucker rod are connected as one, and forms the seal moving body that can move up and down with pipe in the last packing box that has outside seal.
Beneficial effect of the present invention:
The present invention through the sealing to wire rope, can realize that wire rope and sucker rod connect as one the entering packing box under the prerequisite that guarantees sealing.Solve the stroke of sucker rod in the switching-over preferably, on the basis that does not influence stroke, reduced the complete machine height of oil pumper, be implemented under the prerequisite that does not increase the oil pumper height overall, be easy to realize long stroke, low jig frequency.Because it is little that wind-engaging carries influence, preferably resolves the problem that is easy to topple over because of the excessive long stroke pumping unit in windward side, reduced maintenance cost.Improved the safety of the maintenance of oil pumper, the oil pumper compact conformation, volume is little, also suitable reduction the cost of oil pumper.
Adopt the long stroke oil pumping that the present invention developed, have following advantage:
1. raising oil recovery efficiency, the ratio of the actual length of stroke loss of oil pump plunger piston is less, has improved the discharge coefficient and the coefficient of fullness of oil well pump, improves oil recovery efficiency, increases oil production rate, reduces cost for oil production, increases oil production rate.
2. reduce wear, improve sucker rod and oil well pump life-span, long stroke pumping unit all adopts long stroke, low jig frequency oil pumping mode, can reduce the mechanical wear of oil well pump, the application life of improving oil well pump.In addition, can also reduce the mechanical wear between sucker rod and the oil pipe, can improve oil pumper and reach 4～5 times application life.
3. discharge capacity is stable, and dynamic loading is little, and accident is few: long stroke pumping unit is in the up-down stroke process, and the constant motion time is longer, and the oil discharge capacity is more stable, and the oil pumper dynamic loading is less, and the oil pumping system accident is less, has increased the oil pumping system security reliability.In addition, the moment of torsion of long stroke pumping unit reducer is less, is merely 16%～33% of similarity condition common beam oil pumper, prolongs oil well repair free period the application life of having improved oil pumper and oil pumping system, reduces down-hole accident.
4. help improving drive disk assembly force-bearing situations such as sucker rod, the oil pumper running steadily improves the safety and reliability and the application life of oil pumper and oil pumping system.Long stroke pumping unit adopts the low jig frequency oil pumping, and running is steady, and noise is all less with vibration, has also reduced fatigue stress and stress-number of cycles, helps improving the life-span of sleeve pipe, oil pipe, sucker rod and pump, has reduced cost for oil production.
Description of drawings:
Accompanying drawing 1 is the structural representation of this product.
Accompanying drawing 2 is structural representations of the another kind of form of this product.
The specific embodiment:
Embodiment 1:
Oil field shaft mouth double containment packing box; Its composition comprises: the steel cord ends seal 21 that supplies wire rope 1 to penetrate; Described steel cord ends seal connects packing box sealing device 22; Described packing box sealing device connects big four 16, and pipe 17 lower ends connect packing box lower contact 20 in the last packing box that described packing box sealing device is had, and connects the movable joint 14 that is used for fixing wire rope in the described big four; Described movable joint connects fixation with steel wire 13, and described movable joint connects the loose joint headgear 15 that is used to connect sucker rod.
Embodiment 2:
Above-mentioned oil field shaft mouth double containment packing box; Described steel cord ends seal comprises wire rope packing 3; Described wire rope packing connects wire rope pressure cap 2, and described wire rope pressure cap, wire rope packing external seal lock sleeve 4, described lock sleeve connect locking slips 5.
Embodiment 3:
Above-mentioned oil field shaft mouth double containment packing box; Described packing box sealing device comprises packing axle sleeve 6; Described packing axle sleeve stretches into described lock sleeve and connects locking slips 5, and described packing axle sleeve connects packing pressure cap 7, and described packing axle sleeve, packing pressure cap are connected with packing 10 jointly; Described packing pressure cap is connected the described pipe 17 in the packing box of going up with packing, described going up in the packing box is with joint ring 19 on the pipe; Described going up managed the big packing 11 of connection in the packing box, described big packing connects big packing gland 9, and described big packing gland connects big packing pressure cap 8.
Embodiment 4:
The method of oil field shaft mouth double containment; Through wire rope pressure cap 2, wire rope packing 3, lock sleeve 4, locking slips 5 with wire rope 1 external surface fixing seal; To lock slips 5, packing axle sleeve 6, packing pressure cap 7 and packing 10 through described lock sleeve 4 and connect as one, form the outside movable sealing of wire rope assembly; Described fixation with steel wire 13 is fixed on wire rope 1 in the movable joint 14; Described loose joint headgear 15 is connected as one with sucker rod; Form the seal moving body that can move up and down with pipe in the last packing box that has outside seal 17; Wire rope 1 is fixed in the movable joint 14 through fixation with steel wire 13, and described loose joint headgear connects with sucker rod, makes wire rope and sucker rod realize seamless link.
The present invention is made up of parts such as wire rope pressure cap, wire rope packing, lock sleeve, locking slips, packing axle sleeve, big packing pressure cap, big packing gland, packing, big packing, threeways.The fixation with steel wire head is fixed on wire rope in the movable joint, and the loose joint headgear connects with sucker rod, and packing axle sleeve, locking slips, lock sleeve, wire rope packing, the wire rope pressure cap is fixed as one wire rope and realize steel cord ends sealing.Pipe relatively moves in packing pressure cap, packing axle sleeve and packing and the last packing box, has realized the sealing of managing in wire rope and the last packing box through packing.Parts such as Guan Yuda packing pressure cap, big packing gland, packing, big packing threeway have been realized the sealing of pipe and threeway in the last packing box through packing in the last packing box.
Shown in the accompanying drawing 1; The present invention is by wire rope pressure cap 2, wire rope packing 3, lock sleeve 4, locking slips 5, wire rope and sucker rod is fixing as a whole; Wire rope packing 3 and wire rope are provided with the hermetically-sealed construction of relative motion; Can get into packing box when realizing the steel cord ends sealing, fixation with steel wire 13 is fixed on wire rope in the movable joint 14, and loose joint headgear 15 connects with sucker rod; Realized the seamless connecting structure of wire rope and sucker rod; Packing axle sleeve 6, packing pressure cap 7, packing 10, go up in the packing box pipe 17 and formed wire rope and get into the packing box hermetically-sealed construction, pipe 17, joint ring 19, the fixed sealed inner tube of packing box lower contact 20 compositions in the last packing box, wire rope and sucker rod relatively move up and down.Big packing pressure cap 8, big packing gland 9, big packing 11, thread bush 12, big four 16, tubing coupling 18 have been realized the sealing of pipe and thread bush in the last packing box through packing, have accomplished the functions such as oil transportation of packing box.
Claims (2)
1.
a kind of oil field shaft mouth double containment packing box, its composition comprises: the steel cord ends seal that supplies wire rope to penetrate is characterized in that: described steel cord ends seal connects the packing box sealing device; Described packing box sealing device connects big four, and the pipe lower end connects the packing box lower contact in the last packing box that described packing box sealing device is had, and connects the movable joint that is used for fixing wire rope in the described big four; Described movable joint connects the fixation with steel wire head; Described movable joint connects the loose joint headgear that is used to connect sucker rod, and described steel cord ends seal comprises the wire rope packing, and described wire rope packing connects the wire rope pressure cap; Described wire rope pressure cap, wire rope packing external seal lock sleeve; Described lock sleeve connects the locking slips, and described packing box sealing device comprises the packing axle sleeve, and described packing axle sleeve stretches into described lock sleeve and connects the locking slips; Described packing axle sleeve connects the packing pressure cap; Described packing axle sleeve, packing pressure cap are connected with packing jointly, and described packing pressure cap is connected the described pipe in the packing box of going up with packing, and described going up in the packing box is with joint ring on the pipe; Described going up managed the big packing of connection in the packing box, described big packing connects big packing gland, and described big packing gland connects big packing pressure cap.
2. the method for
a kind of oil field shaft mouth double containment; It is characterized in that: through wire rope pressure cap, wire rope packing, lock sleeve, locking slips with wire rope external surface fixing seal; To lock slips, packing axle sleeve, packing pressure cap and packing through described lock sleeve and connect as one, form the outside movable sealing of wire rope assembly; The fixation with steel wire head is fixed on wire rope in the movable joint, and the cover and the sucker rod of described movable joint are connected as one, and forms the seal moving body that can move up and down with pipe in the last packing box that has outside seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810137041A CN101666218B (en) | 2008-09-01 | 2008-09-01 | Double-sealing packing box for oil field wellhead and wellhead double-sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810137041A CN101666218B (en) | 2008-09-01 | 2008-09-01 | Double-sealing packing box for oil field wellhead and wellhead double-sealing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666218A CN101666218A (en) | 2010-03-10 |
| CN101666218B true CN101666218B (en) | 2012-10-03 |
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ID=41802982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810137041A Expired - Fee Related CN101666218B (en) | 2008-09-01 | 2008-09-01 | Double-sealing packing box for oil field wellhead and wellhead double-sealing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101666218B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677484B (en) * | 2020-07-22 | 2023-08-18 | 梅河口市弘业无缝钢管有限公司 | Intelligent ultra-long stroke oil extraction production system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4532987A (en) * | 1984-02-21 | 1985-08-06 | Reed Lehman T | Geothermal expansion spool piston |
| US4718679A (en) * | 1987-01-15 | 1988-01-12 | Cooper Industries | Lockdown ring assembly for wellhead seal |
| CN2547866Y (en) * | 2002-05-17 | 2003-04-30 | 朱英杰 | Long-life energy-saving pumping-well head polish rod sealing apparatus |
| CN1523201A (en) * | 2003-02-18 | 2004-08-25 | 于海颜 | Well pumping unit pit-top abrasion-proof, corrosion-resisting apparatus |
-
2008
- 2008-09-01 CN CN200810137041A patent/CN101666218B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4532987A (en) * | 1984-02-21 | 1985-08-06 | Reed Lehman T | Geothermal expansion spool piston |
| US4718679A (en) * | 1987-01-15 | 1988-01-12 | Cooper Industries | Lockdown ring assembly for wellhead seal |
| CN2547866Y (en) * | 2002-05-17 | 2003-04-30 | 朱英杰 | Long-life energy-saving pumping-well head polish rod sealing apparatus |
| CN1523201A (en) * | 2003-02-18 | 2004-08-25 | 于海颜 | Well pumping unit pit-top abrasion-proof, corrosion-resisting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101666218A (en) | 2010-03-10 |
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