CN210622755U - SAGD oil well doublestage polished rod sealing device - Google Patents
SAGD oil well doublestage polished rod sealing device Download PDFInfo
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- CN210622755U CN210622755U CN201921563648.4U CN201921563648U CN210622755U CN 210622755 U CN210622755 U CN 210622755U CN 201921563648 U CN201921563648 U CN 201921563648U CN 210622755 U CN210622755 U CN 210622755U
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Abstract
The utility model discloses a SAGD oil well doublestage polished rod sealing device, including packing box lower clutch, upper portion flashboard, lower part flashboard and cavity, the top of cavity is connected with packing box lower clutch through the screw thread, and the front end and the upper portion of upper portion flashboard are installed upper portion flashboard sealing rubber core; the lower part flashboard is provided with a sealing groove, the middle position of the lower part of the cavity is provided with a grease injection hole, the grease injection hole is communicated with the inside of the cavity, and sealing grease is injected into the grease injection sealing groove on the lower part flashboard through the grease injection hole to form sealing. The utility model discloses utilize the sealed gluey core elastomer of upper portion flashboard sealed, a plurality of seal structure such as sealed of grease is annotated in lower part flashboard gap to cooperate the operation mutually, realized that trade the packing fast, the area is pressed and is traded the function of gluing the core.
Description
Technical Field
The utility model relates to a SAGD oil well especially relates to SAGD oil well doublestage polished rod sealing device.
Background
After the operation is taken out in SAGD production well commentaries on classics, along with well head equipment's long-term operation, the continuous wearing and tearing of polished rod, packing box leakage is more and more serious, and packing is changed also more and more frequently, changes packing at present and mainly relies on the lower part to annotate fat packing box and annotates that fat is sealed can go on in the back, adopts the high pressure to annotate the mode change packing that fat rifle annotated fat to be had: after the high-temperature sealing grease is cured, the problems of extruding a polished rod, clamping a pump, blocking an oil nozzle and the like are easily caused.
At present, the packing in the oil pumping packing box is replaced, the operation can be carried out after the grease injection sealing of the lower grease injection packing box is mainly relied on, 1 hour or more is needed in each operation, the pressure of the ground grease injection reaches more than 30MPa, and because the blank pressing is too high, the grease injection on two sides is uneven when the grease injection sealing is carried out, and a polished rod with a deviated top is caused. Along with the increase of injecting glue number of times, the later stage is injected, is injected into the operation degree of difficulty greatly winter.
The polished rod is deviated and not centered on the wellhead packing box due to glue injection, so that the polished rod abrasion is aggravated; when the pump is checked in the well repairing process, the formed sealing grease is arranged in the oil pipe, the maximum length of the sealing grease reaches 30cm, and the risk of pump blockage is increased.
Some oil production wells adopt pinhole type adjustable oil nozzles, an annular overflowing area mode is used inside the oil production wells, the overflowing diameter is relatively small, and sealing grease is obtained from the blocked oil nozzles.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a SAGD oil well doublestage polished rod sealing device, this sealing device mainly adopt the sealed form of double-gate board, utilize upper portion flashboard rubber core elastomer sealed, the sealed operation of mutually supporting of multiple seal structure such as fat is annotated in lower part flashboard gap, have realized quick replacement packing, have pressed the function of trading the flashboard rubber core.
In order to solve the problems existing in the prior art, the utility model discloses a technical scheme be:
the SAGD oil well double-stage polish rod sealing device comprises a packing box lower joint, an upper flashboard, a lower flashboard and a cavity, wherein the top of the cavity is connected with the packing box lower joint through threads, and an upper flashboard sealing rubber core is arranged at the front end and the upper part of the upper flashboard; the lower part flashboard is provided with a sealing groove, the middle position of the lower part of the cavity is provided with a grease injection hole, the grease injection hole is communicated with the inside of the cavity, and sealing grease is injected into the grease injection sealing groove on the lower part flashboard through the grease injection hole to form sealing.
The upper portion flashboard install in upper portion flashboard epaxial, upper portion flashboard axle passes upper portion support, and upper portion support passes through upper portion bolt mounting in the left and right sides on the upper portion of cavity, upper portion flashboard axle is connected with the upper portion lead screw, and the upper portion lead screw is installed on the upper portion support through upper portion pressure cap, and the upper portion hand wheel is installed on the upper portion lead screw.
The lower flashboard is arranged on a lower flashboard shaft, the lower flashboard shaft penetrates through a lower support, the lower support is arranged on the left side and the right side of the cavity through lower bolts, the lower flashboard shaft is connected with a lower lead screw, the lower lead screw is arranged on the lower support through a lower pressing cap, and a lower hand wheel is arranged on the lower lead screw.
The upper flashboard sealing rubber core is an elastic sealing body.
The lower flashboard is made of red copper.
The packing box lower joint on be provided with the observation hole.
The sealing grease adopts JYD21 type high-temperature grease injection sealing grease.
The operation method for replacing the oil well polish rod packing of the SAGD oil well double-stage polish rod sealing device comprises the following steps:
① installing SAGD oil well double-stage polish rod sealing device on the well mouth of the production well;
② when the packing needs to be replaced, the upper flashboard can hold the polish rod tightly by rotating the hand wheel after the well is stopped, so as to realize sealing;
③ opening the observation hole to observe whether the sealing is complete, if complete sealing and no pressure leakage, the first and second packing can be replaced;
④ after the packing is replaced, the hand wheel is rotated to make the upper flashboard loose the polish rod and return to the flashboard cavity;
⑤ and replacing the packing, and pumping the oil well.
The operation method for replacing the flashboard sealing rubber core of the SAGD oil well double-stage polish rod sealing device comprises the following steps:
① stopping the pump;
② the lower gate plate is screwed tightly by a hand wheel to hold the polish rod tightly;
③ injecting sealing grease into the grease injection hole through a high-pressure grease injection gun, and observing whether the sealing is complete through the observation hole after the sealing;
③ when the sealing is complete, replacing the upper gate plate sealing rubber core;
④ after the replacement of the upper gate plate sealing rubber core is completed, the upper gate plate and the lower gate plate are all retracted into the gate plate cavity;
⑤ the replacement of the upper gate plate sealing rubber core is completed under pressure, and the oil well is pumped.
The utility model has the advantages and beneficial effects that:
1. the utility model discloses SAGD oil well doublestage polished rod sealing device's upper portion flashboard rubber sealant core is the high temperature resistant rubber sealant core of producing of the gold ant rubber products Limited company that runs back greatly of the brocade, and what adopt is that high temperature resistant nanometer reinforcing composite material is as sealed unit, makes the upper gate board rubber sealant core have excellent high temperature resistant intensity, and the highest service temperature breaks through 400 ℃; meanwhile, the material has long ageing resistance time, long service life of 3-6 months, strong corrosion resistance and high-temperature elasticity.
2. The utility model discloses utilize the sealed gluey core elastomer of upper portion flashboard sealed, a plurality of seal structure such as sealed of grease is annotated in lower part flashboard gap to cooperate the operation mutually, realized that trade the packing fast, the area is pressed and is traded the function of gluing the core.
3. The utility model discloses structurally adopt multi-functional integrated design, reduced whole height, solved the not enough problem of site space.
4. The utility model discloses because annotate the fat in lower part flashboard gap, only need pour into a small amount of sealed fat into, just can realize reliable well head is sealed.
5. The utility model discloses owing to adopt JYD21 type high temperature to annotate sealed fat of fat, can not solidify under high temperature and oil gas well operating mode, can realize annotating the fat many times. Parameters of JYD21 type high-temperature grease injection sealing grease: suitable media are: oil, water, steam, chemicals; size: diameter 20mm and length 80 mm; temperature resistance: 800 ℃. The JYD21 high-temperature grease injection sealing grease has ultrahigh temperature resistance, can work at high temperature for a long time, and can resist the highest high temperature of 800 ℃. Tests show that the sealing grease is used for a long time at the high temperature of 300 ℃, the material is unchanged, cementing cannot occur, the sealing grease can be dispersed in a foam-breaking state under the action of external force and cannot fall off in a block state, and therefore the problems of pump blockage, oil nozzle blockage and the like are avoided. The sealing grease is used in the pressure-bearing test of the SAGD well downhole temperature test, and the sealing performance is reliable after long-term use.
Drawings
FIG. 1 is the overall structure schematic diagram of the SAGD oil well two-stage polish rod sealing device of the present invention;
FIG. 2 is a schematic view of an upper gate structure;
FIG. 3 is a top view of the lower gate;
FIG. 4 is a perspective view of the lower gate;
FIG. 5 is a graph of the tensile strength of the upper gate plate sealant core in an aging test at 250 ℃;
FIG. 6 is a graph of strength retention of an upper gate plate sealant core in an aging test at 250 ℃;
FIG. 7 is a graph of the tensile strength of the upper gate plate sealant core in an aging test at 300 ℃;
FIG. 8 is a graph of strength retention of an upper gate plate sealant core in an aging test at 300 ℃;
FIG. 9 is a graph of the tensile strength of the upper gate plate sealant core in an aging test at 350 ℃;
FIG. 10 is a graph of strength retention of the upper gate plate sealant core in aging experiments at 350 ℃.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
as shown in figure 1, the utility model discloses SAGD oil well doublestage polished rod sealing device, including packing box lower clutch 1, upper portion flashboard 3, lower part flashboard 16 and cavity 19, the top of cavity 19 is passed through the screw thread and is connected with packing box lower clutch 1, packing box lower clutch 1 on be provided with observation hole 2.
As shown in fig. 1 and 2, an upper gate plate sealing rubber core 20 is mounted at the front end and the upper part of the upper gate plate 3; the upper gate plate 3 is arranged on an upper gate plate shaft 5, the upper gate plate shaft 5 penetrates through an upper support 4, the upper support 4 is arranged on the left side and the right side of the upper portion of the cavity 19 through upper bolts 9, the upper gate plate shaft 5 is connected with an upper lead screw 7, the upper lead screw 7 is arranged on the upper support 4 through an upper pressing cap 6, and an upper hand wheel 8 is arranged on the upper lead screw 7.
Through clockwise or anticlockwise rotation upper portion hand wheel 8, thereby make upper portion lead screw 7 rotate and drive upper portion flashboard 3 on upper portion flashboard axle 5 and the upper portion flashboard epaxial 5 forward or backward movement, forward movement then holds the polished rod tightly through upper portion flashboard rubber packing element 20, seals the polished rod, backward movement makes upper portion flashboard 3 lead back to the flashboard intracavity.
As shown in fig. 1, 3 and 4, the lower gate plate is made of red copper, so that metal sealing can be realized. The lower gate 16 is arranged on a lower gate shaft 13, the lower gate shaft 13 penetrates through a lower support 14, the lower support 14 is arranged on the left side and the right side of the cavity 19 through lower bolts, the lower gate shaft 13 is connected with a lower lead screw 10, the lower lead screw 10 is arranged on the lower support 14 through a lower pressing cap 12, and a lower hand wheel 11 is arranged on the lower lead screw 10. The lower gate plate 13 is provided with a sealing groove 21, the middle position of the lower part of the cavity 19 is provided with a grease injection hole 18, the grease injection hole 18 is communicated with the inside of the cavity 19, and after the lower gate plate 16 is screwed tightly through the lower hand wheel 11 and moves towards the center position of the lower part of the cavity to hold the polish rod tightly, sealing grease 17 can be injected into the grease injection sealing groove 21 on the lower gate plate 13 through the grease injection hole 18, so that sealing is formed.
The upper gate plate sealing rubber core 20 is an elastic sealing body. The sealing grease 17 adopts JYD21 type high-temperature grease injection sealing grease.
As shown in FIGS. 5 to 10, the tensile strength and strength retention at 250 deg.C, 300 deg.C and 350 deg.C respectively in the aging test of the upper gate plate sealant core are shown.
The operation method for replacing the oil well polish rod packing of the SAGD oil well double-stage polish rod sealing device comprises the following steps:
① installing SAGD oil well double-stage polish rod sealing device on the well mouth of the production well;
② when the packing needs to be replaced, the upper flashboard can hold the polish rod tightly by rotating the hand wheel after the well is stopped, so as to realize sealing;
③ opening the observation hole to observe whether the sealing is complete, if complete sealing and no pressure leakage, the first and second packing can be replaced;
④ after the packing is replaced, the hand wheel is rotated to make the upper flashboard loose the polish rod and return to the flashboard cavity;
⑤ and replacing the packing, and pumping the oil well.
The operation method for replacing the flashboard sealing rubber core of the SAGD oil well double-stage polish rod sealing device comprises the following steps:
① stopping the pump;
② the lower gate plate is screwed tightly by a hand wheel to hold the polish rod tightly;
③ injecting sealing grease into the grease injection hole through a high-pressure grease injection gun, and observing whether the sealing is complete through the observation hole after the sealing;
④ when the sealing is complete, replacing the upper gate plate sealing rubber core;
⑤ after the replacement of the upper gate plate sealing rubber core is completed, the upper gate plate and the lower gate plate are all retracted into the gate plate cavity;
⑥ the replacement of the upper gate plate sealing rubber core is completed under pressure, and the oil well is pumped.
The design principle of the utility model is as follows:
the SAGD oil well two-stage polish rod sealing device mainly adopts a double-gate plate sealing form; when the sealing packing of the polish rod of the oil well is replaced, reliable sealing can be realized only by closing the upper flashboard of the sealing device, and the operation of replacing the packing can be carried out. After the upper portion flashboard is sealed to be inefficacy, the accessible is closed the lower part flashboard to pour into a small amount of JYD21 type high temperature into and annotate that the fat is sealed, can realize reliably sealing, change the flashboard sealing rubber core of upper portion flashboard. The lower flashboard grease injection sealing structure adopts a split end surface labyrinth sealing structure, and reliable sealing can be realized only by injecting a small amount of sealing grease. During normal operation, the polish rod sealer owner latus rectum is 30mm, when the sealed operation of fat is annotated to needs, closes the notes fat flashboard and embraces the polish rod tightly, embraces polish rod external diameter 25mm, injects into a small amount of sealed fat through the outside to sealed space after the closure and seals, changes the flashboard on upper portion and seals gluey core.
In order to maintain the normal use of equipment and the safety of staff operation, the pumping stop state is ensured during the oil pumping packing replacement operation every time, the sealing condition of the flashboard of the multifunctional polished rod sealing device is carefully observed when the pressure cap of the packing box is disassembled, if the situation that the flashboard is not tight in sealing or fails is found, the pressure cap of the oil pumping packing box is immediately screwed, an organization technician carries out reason analysis, a manufacturer is informed to replace the flashboard sealing element if necessary, and other operations are carried out after various performances of the equipment are normal.
Claims (7)
1.SAGD oil well doublestage polished rod sealing device, including packing box lower clutch, upper portion flashboard, lower part flashboard and cavity, its characterized in that: the top of the cavity is connected with a lower joint of the packing box through threads, and the front end and the upper part of the upper flashboard are provided with an upper flashboard sealing rubber core; the lower part flashboard is provided with a sealing groove, the middle position of the lower part of the cavity is provided with a grease injection hole, the grease injection hole is communicated with the inside of the cavity, and sealing grease is injected into the grease injection sealing groove on the lower part flashboard through the grease injection hole to form sealing.
2. The SAGD oil well dual-stage polish rod sealing device of claim 1, wherein the upper gate is mounted on an upper gate shaft, the upper gate shaft passes through an upper bracket, the upper bracket is mounted on the left and right sides of the upper portion of the cavity by upper bolts, the upper gate shaft is connected to an upper lead screw, the upper lead screw is mounted on the upper bracket by an upper gland, and an upper hand wheel is mounted on the upper lead screw.
3. The SAGD oil well dual-stage polish rod sealing device of claim 1, wherein the lower gate is mounted on a lower gate shaft, the lower gate shaft passes through a lower bracket, the lower bracket is mounted on the left and right sides of the cavity by lower bolts, the lower gate shaft is connected with a lower lead screw, the lower lead screw is mounted on the lower bracket by a lower gland, and a lower hand wheel is mounted on the lower lead screw.
4. The SAGD oil well dual-stage polish rod sealing device of claim 1, wherein said upper ram packing rubber core is an elastomeric seal.
5. The SAGD oil well dual-stage polish rod sealing device of claim 1, wherein said lower gate is made of red copper.
6. The SAGD oil well dual-stage polish rod sealing device of claim 1, wherein a viewing hole is provided on the lower joint of the packing box.
7. The SAGD oil well dual-stage polish rod sealing device of claim 1, wherein said sealing grease is JYD21 type high temperature grease injection sealing grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921563648.4U CN210622755U (en) | 2020-04-17 | 2020-04-17 | SAGD oil well doublestage polished rod sealing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921563648.4U CN210622755U (en) | 2020-04-17 | 2020-04-17 | SAGD oil well doublestage polished rod sealing device |
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| CN210622755U true CN210622755U (en) | 2020-05-26 |
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| CN201921563648.4U Active CN210622755U (en) | 2020-04-17 | 2020-04-17 | SAGD oil well doublestage polished rod sealing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894508A (en) * | 2020-08-13 | 2020-11-06 | 赵振军 | Thick oil thermal recovery well head sealing blowout preventer |
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2020
- 2020-04-17 CN CN201921563648.4U patent/CN210622755U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894508A (en) * | 2020-08-13 | 2020-11-06 | 赵振军 | Thick oil thermal recovery well head sealing blowout preventer |
| CN111894508B (en) * | 2020-08-13 | 2022-05-27 | 赵振军 | Thick oil thermal recovery well head sealing blowout preventer |
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