CN212428697U - Coiled tubing well head blowout preventer - Google Patents
Coiled tubing well head blowout preventer Download PDFInfo
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- CN212428697U CN212428697U CN202022210302.5U CN202022210302U CN212428697U CN 212428697 U CN212428697 U CN 212428697U CN 202022210302 U CN202022210302 U CN 202022210302U CN 212428697 U CN212428697 U CN 212428697U
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- blowout preventer
- coiled tubing
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Abstract
The utility model belongs to the technical field of oil gas field well accuse, in particular to coiled tubing well head preventer. A coiled tubing wellhead blowout preventer, comprising: the blowout preventer comprises a blowout preventer body, wherein a plurality of cylinder sleeves are horizontally and oppositely arranged on two sides of the blowout preventer body, piston rods are arranged in the cylinder sleeves, and semi-sealed flashboards are arranged at one ends, close to the blowout preventer body, of the piston rods; the auxiliary sealing device comprises a barrel body, a connecting piece and a mounting seat which are sequentially connected from bottom to top, an inner joint is arranged in the lower end of the connecting piece, a sealing sleeve and a connecting barrel are sequentially arranged on the outer side of the inner joint, a first clamping sleeve and a second clamping sleeve are sequentially arranged in the barrel body from bottom to top, and an auxiliary sealing ring is arranged on the outer side of the second clamping sleeve. The utility model discloses an auxiliary sealing device is add at preventer top, realizes sealing the coiled tubing junction, can effectively prevent that the fluid from spilling over in the well, prevents that the blowout from taking place.
Description
Technical Field
The utility model belongs to the technical field of oil gas field well accuse, in particular to coiled tubing well head preventer.
Background
The coiled tubing is made of low-carbon alloy steel, has good flexibility, is also called as flexible tubing, and a roll of coiled tubing is several kilometers long, can replace the conventional tubing to carry out a lot of operations. The coiled tubing blowout preventer is mainly used for closing a wellhead of a coiled tubing in the operation processes of oil testing, well repairing, well completion and the like, well blowout accidents are prevented, and the requirement on sealing performance is high.
However, the existing coiled tubing blowout preventer is generally used for pushing the semi-seal gate plate to perform blowout prevention sealing through centering of the piston rod, a gap exists between the coiled tubing and the semi-seal gate plate in the using process, the sealing effect of the coiled tubing is poor, the blowout prevention effect is reduced, and the safety of a wellhead is greatly influenced.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model aims at providing a coiled tubing well head preventer adds supplementary sealing device through the preventer top, realizes sealing the coiled tubing junction, can effectively prevent that the fluid in the well from spilling over, prevents that the blowout from taking place.
The technical scheme of the utility model lies in:
a coiled tubing wellhead blowout preventer, comprising:
the top of the blowout preventer body is fixedly connected with an inlet end, the bottom of the blowout preventer body is fixedly connected with an outlet end, two sides of the blowout preventer body are horizontally and oppositely provided with a plurality of cylinder sleeves, one ends of the cylinder sleeves, far away from the blowout preventer body, are provided with fixing plates, piston rods are arranged in the cylinder sleeves, and one ends, close to the blowout preventer body, of the piston rods are provided with semi-sealed flashboards;
the auxiliary sealing device comprises a barrel body, a connecting piece and a mounting seat which are sequentially connected from bottom to top, the lower end of the connecting piece is in an inner conical shape, an inner joint is arranged in the connecting piece, a sealing sleeve and a connecting cylinder are sequentially arranged on the outer side of the inner joint, a first clamping sleeve and a second clamping sleeve are sequentially arranged in the barrel body from bottom to top, the upper portion of the second clamping sleeve is connected in the inner conical shape of the lower end of the connecting piece, a mounting groove is formed in the outer side of the second clamping sleeve, and an auxiliary sealing ring is arranged in the mounting groove.
The relative equidistance fixedly connected with gim peg in preventer body both sides, preventer body inside equidistance is provided with the retaining member.
And a protective cover is arranged at one end, far away from the blowout preventer body, of the fixing plate.
The auxiliary sealing ring comprises a sealing ring body, a binding face and an extension block, the sealing ring body is connected with the mounting groove in an inserting mode, the binding face is parallel to the inner conical shape of the lower end of the connecting piece, the extension block is parallel to the lower end face of the connecting piece, and the vertical distance of the extension block is 2.5 millimeters.
The sealing sleeve is provided with 4, the external diameter of sealing sleeve is being close to connecting piece lower extreme direction is reducing gradually.
The cylinder body is fixedly connected with the top of the inlet end, is communicated with the inside of the inlet end, is cylindrical, and is bonded with a waterproof anti-oxidation layer on the outer surface.
The length of the inner joint is 8 cm, and the inner side of the inner joint is a smooth plane.
The mounting groove is semi-circular arc, semi-circular arc face radian is 180.
The technical effects of the utility model reside in that: 1. the utility model discloses a set up supplementary sealing device at the entrance point top, carry out preliminary sealed to coiled tubing through seal cover and first cutting ferrule, reach supplementary sealed effect. 2. The utility model discloses an outside auxiliary seal circle that sets up of second cutting ferrule at auxiliary sealing device, through the binding face and the extension piece that sealing washer body top set up, inside the tight barrel of subsides when sealing washer body atress warp, seal the coiled tubing junction, reach the effect that improves sealing performance.
The following will be further described with reference to the accompanying drawings.
Drawings
Figure 1 is the utility model relates to a coiled tubing well head preventer schematic structure.
Fig. 2 is the utility model discloses a section structure schematic diagram of coiled tubing wellhead blowout preventer.
Fig. 3 is the utility model relates to an auxiliary sealing device section structure schematic diagram of coiled tubing well head preventer.
Fig. 4 is an installation schematic view of the auxiliary sealing ring of the auxiliary sealing device of the present invention.
Reference numerals: 1-a blowout preventer body, 2-an inlet end, 3-an auxiliary sealing device, 4-a cylinder sleeve, 5-a fixing bolt, 6-a fixing plate, 7-a protective cover, 8-an outlet end, 9-a piston rod, 10-a locking piece, 11-a semi-seal gate, 31-a cylinder body, 32-a connecting piece, 33-a mounting seat, 34-a first clamping sleeve, 35-a second clamping sleeve, 36-an inner joint, 37-a sealing sleeve, 38-a connecting cylinder, 39-an auxiliary sealing ring, 391-a sealing ring body, a binding surface 392, 393-an extension block and 394-a mounting groove.
Detailed Description
Example 1
In order to overcome current coiled tubing preventer and right the half sealed flashboard that promotes through the piston rod and prevent spouting sealedly, have clearance, the relatively poor problem of sealed effect between coiled tubing and the half sealed flashboard, the utility model provides a coiled tubing well head preventer as shown in fig. 1, the utility model discloses a supplementary sealing device is add at the preventer top, realizes sealing the coiled tubing junction, can effectively prevent that the fluid in the well from spilling over, prevents that the blowout from taking place.
As shown in fig. 1, 2, 3, a coiled tubing wellhead blowout preventer comprising:
the top of the blowout preventer body 1 is fixedly connected with an inlet end 2, the bottom of the blowout preventer body 1 is fixedly connected with an outlet end 8, two sides of the blowout preventer body 1 are horizontally and oppositely provided with a plurality of cylinder sleeves 4, one ends, far away from the blowout preventer body 1, of the cylinder sleeves 4 are provided with fixing plates 6, piston rods 9 are arranged inside the cylinder sleeves 4, and one ends, close to the blowout preventer body 1, of the piston rods 9 are provided with semi-sealed flashboards 11;
the auxiliary sealing device 3 comprises a cylinder body 31, a connecting piece 32 and a mounting seat 33 which are sequentially connected from bottom to top, the lower end of the connecting piece 32 is in an inner conical shape, an inner joint 36 is arranged in the inner conical shape, a sealing sleeve 37 and a connecting cylinder 38 are sequentially arranged on the outer side of the inner joint 36, a first clamping sleeve 34 and a second clamping sleeve 35 are sequentially mounted in the cylinder body 31 from bottom to top, the upper portion of the second clamping sleeve 35 is connected in the inner conical shape at the lower end of the connecting piece 32, a mounting groove 394 is formed in the outer side of the second clamping sleeve 35, and an auxiliary sealing ring 39 is mounted in the mounting groove 394.
The utility model initially seals the 34 coiled tubing through the sealing sleeve 37 and the first cutting sleeve in the auxiliary sealing device 3, so as to achieve the effect of auxiliary sealing; through set up auxiliary seal 39 in auxiliary seal device 3's second cutting ferrule 35 outside, inside the tight barrel of subsides when auxiliary seal 39 body atress warp, sealed the coiled tubing junction, reached the effect that improves sealing performance.
Example 2
Preferably, on the basis of embodiment 1, in this embodiment, fixing bolts 5 are fixedly connected to two sides of the blowout preventer body 1 at opposite equal intervals, and locking pieces 10 are arranged inside the blowout preventer body 1 at equal intervals. The end of the fixed plate 6 away from the blowout preventer body 1 is provided with a shroud 7.
In practical use, the two sides of the blowout preventer body 1 are fixedly connected with the fixing bolts 5 at equal intervals relatively, the cylinder sleeve 4 can be effectively fixed on the blowout preventer body 1, the protecting cover 7 is arranged at one end, far away from the blowout preventer body 1, of the fixing plate 6, and the protecting cover 7 can form effective protection when the piston rod 9 pushes the semi-seal gate 11 to move.
Preferably, as shown in fig. 4, the auxiliary sealing ring 39 includes a sealing ring body 391, an abutting surface 392 and an extension 393, wherein the sealing ring body 391 is inserted into the mounting groove 394, the abutting surface 392 is parallel to the inner taper of the lower end of the connecting member 32, and the extension 393 is parallel to the lower end of the connecting member 32 and has a vertical distance of 2.5 mm.
In actual use, through the binding face 392 and the extension block 393 arranged on the auxiliary sealing ring 39, the sealing ring body 391 is tightly adhered to the inside of the cylinder body when deforming under stress, the joint of the continuous oil pipe is sealed, and the effect of improving the sealing performance is achieved.
Preferably, the number of the sealing sleeves 37 is four, and the outer diameter of the sealing sleeves 37 is gradually reduced in a direction approaching the lower end of the connecting member 32.
In practical use, the number of the sealing sleeves 37 is four, and the outer diameter of the sealing sleeves 37 gradually decreases in the direction close to the lower end of the connecting piece 32, so that a good seal is formed between the sealing sleeves 37 and the connecting cylinder 38.
Preferably, the cylinder 31 is fixedly connected with the top of the inlet end 2, the cylinder 31 is communicated with the inside of the inlet end 2, the cylinder 31 is cylindrical, and a layer of waterproof and anti-oxidation layer is bonded on the outer surface of the cylinder 31.
In practical use, the waterproof oxidation-resistant layer can prevent the outer surface of the cylinder 31 from rusting or being oxidized and corroded after long-term use.
Preferably, the nipple 36 has a length of 8 cm, and the inside of the nipple 36 is a smooth plane. The mounting groove 394 is a semi-circular arc, and the radian of the semi-circular arc surface is 180 degrees.
In practical use, the inner side of the inner joint 36 is a smooth plane, so that insertion of a continuous pipe can be facilitated, the mounting groove 394 is in a semi-circular arc shape, the radian of the semi-circular arc surface is 180 degrees, and the sealing ring body 391 can be better fixedly mounted.
A coiled tubing wellhead blowout preventer specifically uses as follows:
s1, installing a coiled tubing wellhead blowout preventer;
transporting the blowout preventer body 1 to a wellhead position to be used, connecting the outlet end 8 to a wellhead device through bolts, and installing the cylinder body 31 on the top of the inlet end 2 through bolts;
s2: sealing the continuous oil pipe;
s21, inserting an external coiled tubing into the inner joint 36, attaching the inner wall of the external second cutting sleeve 35 through the sealing ring in the sealing sleeve 37 to perform primary sealing, and attaching the outer wall of the coiled tubing through the first cutting sleeve 34 to perform auxiliary sealing, so as to achieve the effect of auxiliary sealing;
s22, when the sealing ring body 391 is squeezed into the bevel angle arranged in the cylinder body 31 through the binding surface 392 and the extending block 393 arranged on the sealing ring body 391, the sealing ring body 31 deforms under stress and clings to the inside of the cylinder body 31 to seal the joint of the coiled tubing, so that the effect of improving the sealing performance is achieved;
s3: starting the blowout preventer to work;
when a blowout occurs, hydraulic oil enters the cylinder sleeve 4, the piston rod 9 in the protective cover 7 is restored to the active state through the locking piece 10, and the piston rod 9 is movably righted to push the semi-seal ram 11 to push the center of the blowout preventer body to perform blowout prevention sealing;
s4: blowout preventer end of service
After the coiled tubing wellhead blowout preventer is used, the semi-sealed ram 11 is retracted towards two sides of the blowout preventer body 1 through the movement of the piston rod 9, then the coiled tubing is pulled out from the blowout preventer body 1, the coiled tubing is separated from the first clamping sleeve 34 and the second clamping sleeve 35, meanwhile, the sealing ring body 391 is extruded out of the bevel angle arranged inside the cylinder body 31, the sealing ring body 31 recovers the original shape, finally, the coiled tubing is pulled out from the inside of the cylinder body 31, and the coiled tubing is specially stored.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (8)
1. The utility model provides a coiled tubing well head preventer which characterized in that: the method comprises the following steps:
the blowout preventer comprises a blowout preventer body (1), wherein the top of the blowout preventer body (1) is fixedly connected with an inlet end (2), the bottom of the blowout preventer body (1) is fixedly connected with an outlet end (8), a plurality of cylinder sleeves (4) are horizontally and oppositely arranged on two sides of the blowout preventer body (1), a fixing plate (6) is installed at one end, far away from the blowout preventer body (1), of each cylinder sleeve (4), a piston rod (9) is installed inside each cylinder sleeve (4), and a semi-seal flashboard (11) is arranged at one end, close to the blowout preventer body (1), of each piston rod;
auxiliary seal device (3), auxiliary seal device (3) are including barrel (31), connecting piece (32), mount pad (33) that connect gradually from bottom to top, connecting piece (32) lower extreme is interior toper, is equipped with nipple (36) in it, nipple (36) outside is equipped with seal cover (37) and connecting cylinder (38) in proper order, first cutting ferrule (34), second cutting ferrule (35) are installed in proper order from bottom to top to barrel (31) inside, second cutting ferrule (35) upper portion connect in the interior toper of connecting piece (32) lower extreme, second cutting ferrule (35) outside be provided with mounting groove (394), install auxiliary seal circle (39) in mounting groove (394).
2. The coiled tubing wellhead blowout preventer of claim 1, wherein: the blowout preventer body (1) both sides equidistance fixedly connected with gim peg (5) relatively, blowout preventer body (1) inside equidistance is provided with retaining member (10).
3. The coiled tubing wellhead blowout preventer of claim 1, wherein: and a protective cover (7) is arranged at one end, far away from the blowout preventer body (1), of the fixing plate (6).
4. The coiled tubing wellhead blowout preventer of claim 1, wherein: the auxiliary sealing ring (39) comprises a sealing ring body (391), a binding surface (392) and an extension block (393), the sealing ring body (391) is inserted into the mounting groove (394), the binding surface (392) is parallel to the inner conical shape at the lower end of the connecting piece (32), the extension block (393) is parallel to the lower end surface of the connecting piece (32), and the vertical distance of the extension block is 2.5 mm.
5. The coiled tubing wellhead blowout preventer of claim 1, wherein: the number of the sealing sleeves (37) is 4, and the outer diameter of each sealing sleeve (37) is gradually reduced in the direction close to the lower end of the connecting piece (32).
6. The coiled tubing wellhead blowout preventer of claim 1, wherein: the cylinder body (31) is fixedly connected with the top of the inlet end (2), the cylinder body (31) is communicated with the inside of the inlet end (2), the cylinder body (31) is cylindrical, and a layer of waterproof and anti-oxidation layer is bonded on the outer surface of the cylinder body (31).
7. The coiled tubing wellhead blowout preventer of claim 1, wherein: the length of the inner joint (36) is 8 cm, and the inner side of the inner joint (36) is a smooth plane.
8. The coiled tubing wellhead blowout preventer of claim 1, wherein: the mounting groove (394) is in the shape of a semi-circular arc, and the radian of the semi-circular arc is 180 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022210302.5U CN212428697U (en) | 2020-09-30 | 2020-09-30 | Coiled tubing well head blowout preventer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022210302.5U CN212428697U (en) | 2020-09-30 | 2020-09-30 | Coiled tubing well head blowout preventer |
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| Publication Number | Publication Date |
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| CN212428697U true CN212428697U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022210302.5U Active CN212428697U (en) | 2020-09-30 | 2020-09-30 | Coiled tubing well head blowout preventer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065317A (en) * | 2020-09-30 | 2020-12-11 | 中国石油天然气集团有限公司 | Coiled tubing wellhead blowout preventer and use method thereof |
| CN115324521A (en) * | 2021-12-15 | 2022-11-11 | 江苏瑞亿石油机械有限公司 | Deep sea underwater light blowout preventer assembly and control system thereof |
-
2020
- 2020-09-30 CN CN202022210302.5U patent/CN212428697U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065317A (en) * | 2020-09-30 | 2020-12-11 | 中国石油天然气集团有限公司 | Coiled tubing wellhead blowout preventer and use method thereof |
| CN112065317B (en) * | 2020-09-30 | 2024-03-01 | 中国石油天然气集团有限公司 | Coiled tubing wellhead blowout preventer and use method thereof |
| CN115324521A (en) * | 2021-12-15 | 2022-11-11 | 江苏瑞亿石油机械有限公司 | Deep sea underwater light blowout preventer assembly and control system thereof |
| CN115324521B (en) * | 2021-12-15 | 2023-06-02 | 江苏瑞亿石油机械有限公司 | Deep sea underwater light blowout preventer assembly and control system thereof |
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