CN111927374B - Continuous oil pipe wellhead suspension sealing device - Google Patents
Continuous oil pipe wellhead suspension sealing device Download PDFInfo
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- CN111927374B CN111927374B CN202010938916.7A CN202010938916A CN111927374B CN 111927374 B CN111927374 B CN 111927374B CN 202010938916 A CN202010938916 A CN 202010938916A CN 111927374 B CN111927374 B CN 111927374B
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- 238000007789 sealing Methods 0.000 title claims abstract description 158
- 239000000725 suspension Substances 0.000 title claims abstract description 58
- 238000009434 installation Methods 0.000 claims description 18
- 230000000694 effects Effects 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000243 solution Substances 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
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0422—Casing heads; Suspending casings or tubings in well heads a suspended tubing or casing being gripped by a slip or an internally serrated member
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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)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the technical field of coiled tubing fixing devices, in particular to a coiled tubing wellhead suspension sealing device which comprises an upper sealing body, a suspension body, a lower sealing body, a first jackscrew sealing device and a second jackscrew sealing device, wherein the upper sealing body, the suspension body and the lower sealing body are sequentially and fixedly communicated, the upper sealing body and the lower sealing body are in a left-right symmetrical structure as same as each other in structure, a boss is outwards arranged in the middle of the right side of the upper sealing body, and a first mounting channel communicated with the inside and the outside is arranged in the boss.
Description
Technical Field
The invention relates to the technical field of coiled tubing fixing devices, in particular to a coiled tubing wellhead suspension sealing device.
Background
At present, aiming at a casing production well with certain self-injection capacity but small flow-back amount, the conventional discharge and production means is single, and the requirements of safety, environmental protection and high-efficiency exploration and development of oil fields cannot be met, and in recent years, continuous oil pipe pump discharge processes are gradually developed in various domestic oil fields, so that the problem of high-efficiency discharge and production of the casing well is solved; the well mouth hangs sealing device is the key kit in coiled tubing pump row technology, and current hangs sealing device latus rectum little, single-stage seal structure, pressure-bearing load rank are low, can't satisfy big latus rectum instrument and go into with heavy load tubular column suspension seal's requirement.
Disclosure of Invention
The invention provides a coiled tubing wellhead suspension sealing device, overcomes the defects of the prior art, can effectively solve the problems of small drift diameter, single-stage sealing structure and low level of bearing load,
the technical scheme of the invention is realized by the following measures: the utility model provides a coiled tubing well head hangs sealing device, including last sealing body, hang body and lower sealing body, go up sealing body and hang the body, lower sealing body is fixed the intercommunication from top to bottom in proper order, hang body middle part inboard has the first installation passageway that link up about, first installation passageway middle part and the vertical runner intercommunication of hanging body middle part inboard, install the left linkage and the right linkage that structure is the same and symmetric distribution in the first installation passageway, right linkage includes first side door, hang flashboard assembly and first jackscrew sealing device, first side door left side and hanging body right side sealed fixed connection, hang flashboard assembly and install in first installation passageway, the first jackscrew sealing device that can make hanging flashboard assembly remove about installing on the right side of first side door, go up sealing body and lower sealing body structure are the same, it is fixed with left, right both sides bellied boss, the boss is the rectangle to go up the inboard of boss, the inboard second installation passageway that link up through about having of boss, the right side door sealing device and the right side sealed flashboard assembly and install in the second installation passageway, the right side sealing device and the right side sealed flashboard assembly and install the second installation passageway that the second installation passageway can make the right side sealed flashboard assembly, the right side sealed flashboard assembly and install the second installation passageway, the right side sealed flashboard assembly and install the right side sealed flashboard assembly, the right side sealed flashboard assembly and sealed flashboard assembly.
The following is further optimization or/and improvement of the technical scheme of the invention:
the suspension flashboard assembly can comprise a suspension flashboard and a half slip, the left side surface of the suspension flashboard is an arc surface with an opening facing left and a large upper part and a small lower part, a plurality of openings with upward openings are distributed at intervals along the circumferential direction at the upper end of the half slip, the half slip is coaxially fixed on the left side surface of the suspension flashboard, and the right end of the suspension flashboard is fixedly connected with the left end of the first jackscrew sealing device.
The sealing flashboard assembly can comprise a front seal, a sealing flashboard and a top seal, the left side face of the sealing flashboard is a semicircular cambered surface with a leftward opening, the front seal is fixedly installed on the left side face of the sealing flashboard, the top seal is fixedly installed on the right side face of the sealing flashboard, and the right end of the sealing flashboard is fixedly connected with the left end of the second jackscrew sealing device.
The first jackscrew sealing device is the same as the second jackscrew sealing device in structure, the first jackscrew sealing device can comprise a screw rod, a flashboard shaft, a bearing, a protective cover and a pressing cap, the left end of the protective cover is fixedly connected with the right side of a first side door, the inner side of the pressing cap is fixedly connected with the outer side of the right end of the protective cover, the left end of the screw rod penetrates through the pressing cap and the protective cover from right to left in sequence and then is located on the inner side of the first side door, the bearing is installed between the inner side of the right end of the protective cover and the outer side of the screw rod, the right end of a hanging flashboard is fixedly connected with the left end of the flashboard shaft, the right end of the flashboard shaft is provided with an inner threaded hole with a right opening, the right end of the flashboard shaft penetrates through the inner side of the first side door and is in threaded connection with the left end of the screw rod, and the right end of the flashboard shaft is fixedly installed with a nut which can prevent the flashboard shaft from rotating and is sleeved in the protective cover.
The inner side of the first side door corresponding to the outer side position of the flashboard shaft is fixedly provided with a plurality of first sealing rings, the left end of the first side door is fixedly provided with a plurality of second sealing rings between the right end of the hanging body, the inner side of the second side door corresponding to the outer side position of the flashboard shaft is fixedly provided with a plurality of third sealing rings, and the left end of the second side door is fixedly provided with a plurality of fourth sealing rings between the right end of the boss.
The upper sealing body, the hanging body and the lower sealing body can be fixedly communicated together through bolts from top to bottom in sequence, and the drift diameters of the upper sealing body, the hanging body and the lower sealing body are different and are not larger than 180mm.
The invention has the characteristics of reasonable and compact structure, convenient use and large drift diameter, can meet the passing requirement of large-size well entering tools, has the functions of double sealing and high pressure resistance so as to ensure the well control safety during the operation, and simultaneously has the functions of prolonging the suspension service life and preventing the coiled tubing from sliding into the well due to the high-strength load-bearing suspension body structure.
Drawings
Fig. 1 is a schematic front sectional view of the preferred embodiment of the present invention with the upper and lower seal bodies closed and the hanging body open.
The codes in the figures are respectively: 1 is the lead screw, 2 is the pressure cap, 3 is half slips, 4 is first side door, 5 is the second side door, 6 is the flashboard axle, 7 is the nut, 8 is the guard shield, 9 is preceding sealed, 10 is the top seal, 11 is sealed flashboard, 12 is the bearing, 13 is for hanging the flashboard, 14 is the upper seal body, 15 is the body that hangs, 16 is lower seal body, 17 is the boss.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the relationship of the front, back, up, down, left, right, etc. positions is determined according to the layout direction of fig. 1 of the specification.
The invention is further described below with reference to the following examples and figures:
as shown in the attached figure 1, the continuous oil pipe wellhead suspension sealing device comprises an upper sealing body 14, a suspension body 15 and a lower sealing body 16, wherein the upper sealing body 14, the suspension body 15 and the lower sealing body 16 are sequentially and fixedly communicated, a first mounting channel which is through from left to right is arranged on the inner side of the middle part of the suspension body 15, the middle part of the first mounting channel is communicated with a vertical flow channel on the inner side of the middle part of the suspension body 15, a left suspension device and a right suspension device which are identical in structure and symmetrically distributed are mounted in the first mounting channel, the right suspension device comprises a first side door 4, a suspension flashboard 13 assembly and a first jackscrew sealing device, the left side of the first side door 4 is fixedly connected with the right side of the suspension body 15 in a sealing manner, the suspension flashboard 13 assembly is mounted in the first mounting channel, the first jackscrew sealing device which can enable the suspension flashboard 13 assembly to move from left to right is mounted on the right side of the first side door 4, the upper sealing body 14 and the lower sealing body 16 are identical in structure, a boss 17 protruding towards the left side and the right side is fixed on the outer side of the middle of the upper sealing body 14, the boss 17 is rectangular, a second installation channel penetrating from left to right is arranged on the inner side of the boss 17, the middle of the second installation channel is communicated with a vertical flow channel on the inner side of the middle of the upper sealing body 14, a left sealing device and a right sealing device which are identical in structure and symmetrically distributed are installed in the second installation channel, the right sealing device comprises a second side door 5, a sealing gate plate assembly and a second top wire sealing device, the left side of the second side door 5 is fixedly connected with the right side of the boss 17 in a sealing mode, the sealing gate plate assembly is installed in the second installation channel, and the second top wire sealing device capable of enabling the sealing gate plate assembly to move left and right is installed on the right side of the second side door 5.
The coiled tubing wellhead suspension sealing device can be further optimized or/and improved according to actual needs:
as shown in the attached drawing 1, the suspension gate plate assembly comprises a suspension gate plate 13 and a half slip 3, the left side surface of the suspension gate plate 13 is an arc surface with a left opening and a large upper part and a small lower part, a plurality of openings with upward openings are distributed at intervals along the circumferential direction at the upper end of the half slip 3, the half slip 3 is coaxially fixed on the left side surface of the suspension gate plate 13, and the right end of the suspension gate plate 13 is fixedly connected with the left end of a first jackscrew sealing device.
When the half slips 3 in the left suspension flashboard assembly and the half slips 3 in the right flashboard assembly are close to each other, a complete slip can be formed and the coiled tubing can be tightly held, and the self-tightening type suspended flashboard has the functions of high strength, stability, no slipping and self tightening.
As shown in fig. 1, the sealing gate plate assembly comprises a front seal 9, a sealing gate plate 11 and a top seal 10, the left side surface of the sealing gate plate 11 is a semicircular arc surface with a left opening, the front seal 9 is fixedly installed on the left side surface of the sealing gate plate 11, the top seal 10 is fixedly installed on the upper side surface of the right part of the sealing gate plate 11, and the right end of the sealing gate plate 11 is fixedly connected with the left end of the second jackscrew sealing device.
According to the requirement, an oval structure is formed when the left sealing flashboard 11 and the right sealing flashboard 11 tightly hold the coiled tubing in the second installation channel, the stress distribution of the upper sealing body 14 and the lower sealing body 16 can be improved, the safety performance is improved, and the sealing performance of the sealing flashboard assembly to the coiled tubing is improved in the using process.
As shown in fig. 1, the first jackscrew sealing device and the second jackscrew sealing device have the same structure, the first jackscrew sealing device comprises a screw rod 1, a flashboard shaft 6, a bearing 12, a shield 8 and a press cap 2, the left end of the shield 8 is fixedly connected with the right side of a first side door 4, the inner side of the press cap 2 is fixedly connected with the outer side of the right end of the shield 8, the left end of the screw rod 1 sequentially penetrates through the press cap 2 and the shield 8 from right to left and then is positioned on the inner side of the first side door 4, the bearing 12 is installed between the inner side of the right end of the shield 8 and the outer side of the screw rod 1, the right end of a hanging flashboard 13 is fixedly connected with the left end of the flashboard shaft 6, the right end of the flashboard shaft 6 is provided with an inner threaded hole with a right opening, the right end of the flashboard shaft 6 penetrates through the inner side of the first side door 4 and is connected with the left part of the screw rod 1, and the right end of the flashboard shaft 6 is fixedly provided with a nut 7 which can prevent the flashboard shaft 6 from rotating and is sleeved in the shield 8.
The bearing 12 is the prior known technology, can adopt a thrust ball bearing, has the function of reducing the resistance of the rotary screw rod 1, the protective cover 8 has the functions of dust prevention, protection and fixation, and the press cap 2 has the function of limiting the screw rod 1 to move rightwards.
As shown in the attached drawing 1, a plurality of first sealing rings are fixedly installed at intervals on the inner side of the first side door 4 corresponding to the outer side position of the flashboard shaft 6, and a plurality of second sealing rings are fixedly installed at intervals between the left end of the first side door 4 and the right end of the hanging body 15.
According to needs, first sealing washer can adopt O type sealing washer, and the second sealing washer can adopt axle Yx type sealing washer and axle O type sealing washer, plays further sealed effect, has the reliability height, with trading convenient advantage.
As shown in fig. 1, a plurality of third sealing rings are fixedly mounted at intervals on the inner side of the second side door 5 corresponding to the outer side position of the flashboard shaft 6, and a plurality of fourth sealing rings are fixedly mounted between the left end of the second side door 5 and the right end of the boss 17.
According to the needs, the third sealing washer can adopt O type sealing washer, and the fourth sealing washer can adopt axle Yx type sealing washer and axle O type sealing washer, plays further sealed effect, has the reliability height, with changing convenient advantage.
As shown in fig. 1, the upper sealing body 14, the suspension body 15 and the lower sealing body 16 are fixedly communicated together through bolts, and the drift diameters of the upper sealing body 14, the suspension body 15 and the lower sealing body 16 are the same and are not more than 180mm; the passing of a large-size well entering tool can be met.
The application process of the embodiment of the invention comprises the following steps: the invention is arranged at a wellhead and is connected with a coiled tubing blowout prevention system during operation; before the coiled tubing is put into a well, the upper sealing body 14, the hanging body 15 and the lower sealing body 16 are all in an open state, after the coiled tubing is put down to a specified position, two persons rotate the first jackscrew sealing devices on the hanging body 15 at the same time at two sides, the hanging gate plate assembly is moved towards the center of the well mouth through the gate plate shaft until the half slips 3 at two sides are contacted with the coiled tubing, a certain load is applied to the screw rod 1, the half slips 3 at two sides tightly hold the coiled tubing, and then the coiled tubing is slowly lowered to be hung on the hanging body 15; then two persons rotate the second jackscrew sealing devices of the upper sealing body 14 and the lower sealing body 16 simultaneously at two sides to enable the sealing flashboard assemblies to move towards the center of a wellhead until the sealing flashboard assemblies at the two sides are contacted with the coiled tubing to form encircling of the coiled tubing, so that upper and lower two-stage sealing is realized; experiment shows that the sealing pressure of the present invention may reach 35MP and bearing capacity of 30t.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (4)
1. A continuous oil pipe wellhead suspension sealing device is characterized by comprising an upper sealing body, a suspension body and a lower sealing body, wherein the upper sealing body, the suspension body and the lower sealing body are sequentially and fixedly communicated from top to bottom, a first mounting channel which is communicated from left to right is arranged on the inner side of the middle part of the suspension body, the middle part of the first mounting channel is communicated with a vertical flow channel on the inner side of the middle part of the suspension body, a left suspension device and a right suspension device which are identical in structure and symmetrically distributed are mounted in the first mounting channel, the right suspension device comprises a first side door, a suspension flashboard assembly and a first jackscrew sealing device, the left side of the first side door is fixedly connected with the right side of the suspension body in a sealing manner, the suspension flashboard assembly is mounted in the first mounting channel, the right side of the first side door is provided with the first jackscrew sealing device which can enable the suspension flashboard assembly to move from left to right, the upper sealing body and the lower sealing body are identical in structure, the outer side of the middle part of the upper sealing body is fixed with a boss which protrudes leftwards and rightwards, the boss is rectangular, the inner side of the boss is provided with a second installation channel which is through from left to right, the middle part of the second installation channel is communicated with a vertical flow channel at the inner side of the middle part of the upper sealing body, a left sealing device and a right sealing device which have the same structure and are symmetrically distributed are installed in the second installation channel, the right sealing device comprises a second side door, a sealing flashboard assembly and a second jackscrew sealing device, the left side of the second side door is fixedly connected with the right side of the boss in a sealing way, the sealing flashboard assembly is installed in the second installation channel, the right side of the second side door is provided with the second jackscrew sealing device which can enable the sealing flashboard assembly to move leftwards and rightwards, the suspension flashboard assembly comprises a suspension flashboard and a half slip, the left side surface of which is provided with a left opening and a large upper part and a small lower part, and a plurality of openings which are distributed at intervals along the circumferential direction, half slips are coaxially fixed in and hang flashboard left surface, hang flashboard right-hand member and first jackscrew sealing device's left end fixed connection, and sealed flashboard assembly includes preceding sealed, sealed flashboard and top seal, and sealed flashboard left surface is the semicircular cambered surface of opening left, and preceding sealed fixed mounting is in sealed flashboard left surface, and top seal fixed mounting is in the side of sealing flashboard right part, and sealed flashboard right-hand member and second jackscrew sealing device's left end fixed connection.
2. The coiled tubing wellhead suspension sealing device according to claim 1, characterized in that the first jackscrew sealing device and the second jackscrew sealing device are identical in structure, the first jackscrew sealing device comprises a lead screw, a gate plate shaft, a bearing, a shield and a press cap, the left end of the shield is fixedly connected with the right side of the first side door, the inner side of the press cap is fixedly connected with the outer side of the right end of the shield, the left end of the lead screw sequentially penetrates through the press cap and the shield from right to left and then is positioned on the inner side of the first side door, the bearing is installed between the inner side of the right end of the shield and the outer side of the lead screw, the right end of the suspension gate plate is fixedly connected with the left end of the gate plate shaft, the right end of the gate plate shaft is provided with an inner threaded hole with a right opening, the right end of the gate plate shaft penetrates through the inner side of the first side door and is in threaded connection with the left portion of the lead screw, and the right end of the gate plate shaft is fixedly provided with a nut which can prevent the gate plate shaft from rotating and is sleeved in the shield.
3. The coiled tubing wellhead suspension sealing device of claim 2, wherein a plurality of first sealing rings are fixedly installed at intervals on the inner side of the first side door corresponding to the outer side position of the gate plate shaft, a plurality of second sealing rings are fixedly installed at intervals between the left end of the first side door and the right end of the suspension body, a plurality of third sealing rings are fixedly installed at intervals on the inner side of the second side door corresponding to the outer side position of the gate plate shaft, and a plurality of fourth sealing rings are fixedly installed at intervals between the left end of the second side door and the right end of the boss.
4. The coiled tubing wellhead suspension sealing device as claimed in claim 1, 2 or 3, wherein the upper sealing body, the suspension body and the lower sealing body are fixedly communicated together through bolts from top to bottom in sequence, and the drift diameters of the upper sealing body, the suspension body and the lower sealing body are the same and are not more than 180mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938916.7A CN111927374B (en) | 2020-09-09 | 2020-09-09 | Continuous oil pipe wellhead suspension sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938916.7A CN111927374B (en) | 2020-09-09 | 2020-09-09 | Continuous oil pipe wellhead suspension sealing device |
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| Publication Number | Publication Date |
|---|---|
| CN111927374A CN111927374A (en) | 2020-11-13 |
| CN111927374B true CN111927374B (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010938916.7A Active CN111927374B (en) | 2020-09-09 | 2020-09-09 | Continuous oil pipe wellhead suspension sealing device |
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| CN (1) | CN111927374B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5544706A (en) * | 1995-05-24 | 1996-08-13 | Reed; Lehman T. | Retrievable sealing plug coil tubing suspension device |
| CN203531793U (en) * | 2013-11-13 | 2014-04-09 | 胜利油田胜机石油装备有限公司 | Safe and rapid operation well head device for offshore oil well |
| CN206290235U (en) * | 2016-12-14 | 2017-06-30 | 宝鸡市赛孚石油机械有限公司 | The ram preventer of coiled tubing four |
| CN208502721U (en) * | 2018-07-03 | 2019-02-15 | 苏州道森钻采设备股份有限公司 | Coiled tubing complex function double ram type preventer |
| CN109458153A (en) * | 2018-11-30 | 2019-03-12 | 中国海洋石油集团有限公司 | A kind of oil recovery tree device suitable for setting suspension coiled tubing production forever |
| CN111155956A (en) * | 2020-01-20 | 2020-05-15 | 宝鸡市赛孚石油机械有限公司 | Double-piston composite double-ram blowout preventer and method for suspending oil pipe and sealing wellhead |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK178357B1 (en) * | 2008-06-02 | 2016-01-11 | Mærsk Olie Og Gas As | Christmas tree for use in a well |
-
2020
- 2020-09-09 CN CN202010938916.7A patent/CN111927374B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5544706A (en) * | 1995-05-24 | 1996-08-13 | Reed; Lehman T. | Retrievable sealing plug coil tubing suspension device |
| CN203531793U (en) * | 2013-11-13 | 2014-04-09 | 胜利油田胜机石油装备有限公司 | Safe and rapid operation well head device for offshore oil well |
| CN206290235U (en) * | 2016-12-14 | 2017-06-30 | 宝鸡市赛孚石油机械有限公司 | The ram preventer of coiled tubing four |
| CN208502721U (en) * | 2018-07-03 | 2019-02-15 | 苏州道森钻采设备股份有限公司 | Coiled tubing complex function double ram type preventer |
| CN109458153A (en) * | 2018-11-30 | 2019-03-12 | 中国海洋石油集团有限公司 | A kind of oil recovery tree device suitable for setting suspension coiled tubing production forever |
| CN111155956A (en) * | 2020-01-20 | 2020-05-15 | 宝鸡市赛孚石油机械有限公司 | Double-piston composite double-ram blowout preventer and method for suspending oil pipe and sealing wellhead |
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| CN111927374A (en) | 2020-11-13 |
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