CN115949364A - Velocity string, wellhead device thereof and coiled tubing lowering method - Google Patents
Velocity string, wellhead device thereof and coiled tubing lowering method Download PDFInfo
- Publication number
- CN115949364A CN115949364A CN202310220862.4A CN202310220862A CN115949364A CN 115949364 A CN115949364 A CN 115949364A CN 202310220862 A CN202310220862 A CN 202310220862A CN 115949364 A CN115949364 A CN 115949364A
- Authority
- CN
- China
- Prior art keywords
- hanger
- coiled tubing
- speed
- string
- tubing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Earth Drilling (AREA)
Abstract
The invention discloses a velocity string, a wellhead device thereof and a coiled tubing lowering method, belonging to the technical field of petroleum drilling equipment and comprising a velocity string body, a coiled tubing hanger and a first jackscrew; the speed pipe column body comprises a first bearing step; the coiled tubing hanger comprises a plurality of split hangers, each hanger comprises a part of supporting plate, a sealing ring, a hanger body and a slip which are fixedly connected in sequence, the coiled tubing is buckled in the middle by the hangers and integrally installed in the speed tubing string body, and the slip clamps the coiled tubing; the supporting plate is provided with a supporting part, the top of the hanger body is provided with a slope surface, the first jackscrew penetrates through the speed tubular column body along the radial direction and is provided with a conical surface at the end part, and along with the centripetal movement of the first jackscrew, the sealing ring is attached to the outer wall of the continuous oil pipe along the radial direction in an extrusion manner. The invention can integrally install the supporting plate, the sealing ring, the hanger body and the slips, realizes the clamping and sealing of the continuous oil pipe and is convenient to install and use.
Description
Technical Field
The invention relates to the technical field of petroleum drilling and production equipment, in particular to a velocity string, a wellhead device thereof and a coiled tubing lowering method.
Background
Shale oil and shale gas are used as unconventional oil gas resources and are in a vigorous development stage at present, however, conventional oil pipes are still used for exploiting the shale oil at the present stage, the conventional oil pipes need to be connected with an oil pipe hanger through threads, the installation time is long, a screwing machine is needed during threaded connection, and the equipment is complex and troublesome in connection.
Compared with a conventional oil pipe, the coiled oil pipe has the advantages of simple operation, few operating personnel, low cost, fast moving, small occupied area, environmental protection, short tripping time, reduced production halt time, circulation when tripping in and out, operation under pressure of the closed oil pipe, small damage to stratum and the like. But the existing coiled tubing is inconvenient to install and use.
The Chinese patent with the application publication number of CN 103470203A discloses a coiled tubing speed string hanger and a hanging method thereof, and the hanger comprises an upper flange plate, a conical slip, a sealing ring, a slip jackscrew, a C-shaped slip, a piston jackscrew, a piston, an annular sealing washer, a bypass valve, a lower flange plate, a hanger body and a slip seat; the piston jackscrew is positioned on the hanger body, and the piston and the annular sealing washer are positioned inside the hanger body; the slip jackscrew is positioned on the hanger body; the sealing ring and the conical slip are arranged in the coiled tubing body, the sealing ring is arranged on a sealing ring seat at the lower part of the sealing ring, and the conical slip is arranged at the upper part of the sealing ring; the hanger body is connected with the bypass valve through a flange plate. The piston, the annular sealing washer, the conical slips and other structures in the scheme need to be installed and combined one by one in the installation process, and the replacement process is complicated if the structures need to be replaced.
The invention discloses a speed tubular column continuous oil pipe hanger which comprises a continuous oil pipe, an I-shaped flange, an upper slip assembly, a lower slip assembly, an upper shell, a middle shell and a lower shell, wherein the upper shell, the middle shell and the lower shell are respectively provided with a through middle hole, the I-shaped flange is fixedly arranged at the top of the upper shell, the continuous oil pipe sequentially penetrates through the middle holes of the I-shaped flange, the upper shell, the middle shell and the lower shell, the upper slip assembly is clamped on the inner wall of the middle hole of the upper shell, the lower slip assembly is positioned in the middle hole of the middle shell, a connecting pipe sealing group is fixedly arranged on the inner wall of the middle hole of the middle shell and below a suspension supporting sleeve, at least one pair of driving pistons is arranged on the inner wall of the middle hole of the middle shell and the lower shell and below the connecting pipe sealing group, and an upper oil port and a lower oil port which are communicated with the driving pistons are respectively arranged on the side walls of the middle shell and the lower shell. This scheme is suppressed through hydraulic pressure station hydraulic fluid port down, makes the drive piston upwards compress the sealed group of connecting tube, and sealed coiled tubing's outer ring is empty to operation second jackscrew group locking drive piston keeps the empty sealed of coiled tubing's outer ring, and it is visible, and the second jackscrew group of this scheme is limit structure only, and it carries out sealed power supply and is hydraulic oil, and this scheme structure is complicated, is unfavorable for dismantling the change.
In conclusion, the existing coiled tubing is inconvenient to install and use.
Disclosure of Invention
The invention aims to provide a speed pipe column, a wellhead device of the speed pipe column and a coiled tubing lowering method, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a velocity string which comprises a velocity string body, a coiled tubing hanger and a first jackscrew, wherein the coiled tubing hanger comprises a coiled tubing hanger body and a first jackscrew; the speed pipe column body comprises a large-diameter section, a small-diameter section and a first bearing step connected between the large-diameter section and the small-diameter section; the coiled tubing hanger comprises a plurality of hangers which are split along the axial section, each hanger comprises a part of supporting plate, a sealing ring, a hanger body and a slip which are fixedly connected in sequence, the coiled tubing is buckled in the middle by the hangers, the continuous tubing is clamped by the slip, and the coiled tubing hanger is integrally and axially installed in the velocity string body; the supporting plate is provided with a supporting part erected on the first bearing step, the top of the hanger body is provided with a slope, the first jackscrew radially penetrates through the speed pipe column body and is provided with a conical surface attached to the slope at the end part, and along with radial centripetal movement of the first jackscrew, the sealing ring is axially compressed and then radially and centripetally extruded and attached to the outer wall of the continuous oil pipe.
Preferably, the hanger body is provided with a tapered hole, the slips are installed in the tapered hole, the supporting plate, the sealing ring and the hanger body of the same hanger are connected through a first screw arranged in the axial direction, the slips and the hanger body of the same hanger are connected through a second screw arranged in the radial direction, and the hanger body of the different hanger is connected through a third screw perpendicular to the axial direction.
Preferably, a gasket is arranged between the hanger body and the sealing ring, the inner diameter and the outer diameter of the gasket are consistent with those of the sealing ring, and the first screw penetrates through the gasket.
Preferably, the first bearing step is of an inner conical surface structure, the major diameter of the inner conical surface structure is equal to the diameter of the major diameter section, the minor diameter of the inner conical surface structure is equal to the diameter of the minor diameter section, the supporting portion is of an outer conical surface structure, and the taper of the outer conical surface structure is equal to that of the inner conical surface structure.
Preferably, the slope surface is an external conical surface arranged at the top end of the hanger body.
The invention provides a wellhead device, which comprises a tubing head four-way and the speed string as described in the foregoing, wherein the tubing head four-way comprises an upper port, a lower port and two side ports, the lower port is connected with an oil well, the upper port is sequentially connected with a control valve, a speed string and a Christmas tree assembly, one side port is connected with a first gate valve, the other side port is sequentially connected with a first gate valve, a first instrument flange, a first throttle valve and a first check valve, two ends of a speed string body are respectively provided with a connecting flange, the upper end of the speed string body is connected with the Christmas tree assembly, and the lower end of the speed string body is connected with the control valve.
Preferably, a first pressure gauge and a pressure transmitter are connected to the first gauge flange.
Preferably, a conversion flange is arranged between the connecting flange at the upper end and the Christmas tree assembly, and the diameter of the lower end of the conversion flange is larger than that of the upper end.
Preferably, the upper port is provided with a second jackscrew along the radial direction, a second bearing step is coaxially arranged in the four-way joint of the tubing head and the upper port, the second bearing step is used for bearing a conventional tubing hanger, and the second jackscrew is used for fixing the conventional tubing hanger.
The invention also provides a coiled tubing lowering method, which applies the wellhead device as described in the foregoing, and comprises the following contents:
the upper opening of the four-way of the oil pipe head is sequentially connected with the control valve and the speed pipe column, and an operation window, a blowout preventer box and an injection head are sequentially connected above the speed pipe column;
the coiled tubing is lowered into the velocity string body through the injection head and enters the well;
after the coiled tubing is lowered to the place, the coiled tubing hanger is connected with the coiled tubing and installed in the speed tubing string body through the operation window;
and taking down the operating window, the blowout preventer box and the injection head from the upper part of the velocity string, replacing and installing a Christmas tree assembly, and completing the installation of a wellhead.
Compared with the prior art, the invention has the following technical effects:
(1) According to the invention, the coiled tubing hanger is arranged into a plurality of split hangers, each hanger comprises a part of fixedly connected supporting plate, a sealing ring, a hanger body and a slip, the coiled tubing can be clamped by the slip after being buckled among the hangers, the speed tubing is axially and radially limited by the speed tubing string body after being installed in the speed tubing string body, and the sealing of the sealing ring is realized by the first jackscrew, so that the supporting plate, the sealing ring, the hanger body and the slip can be integrally installed, the clamping and the sealing of the coiled tubing are realized, and the installation and the use are convenient;
(2) According to the invention, the second bearing step for bearing the conventional oil pipe hanger is arranged in the oil pipe head four-way joint, the second jackscrew is arranged at the upper opening of the oil pipe head four-way joint, a speed pipe column and a continuous oil pipe hanger can be cancelled if necessary, the conventional oil pipe hanger for hanging oil pipes with different sizes is arranged, the conventional oil pipe hanger is connected with a cable, and an electric pump is added in the wellhead and connected with the cable, so that the wellhead can be reformed into an electric pump structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic illustration of a wellhead configuration according to the present invention;
FIG. 2 is a schematic structural view of the coiled tubing lowering device of the present invention;
FIG. 3 is a schematic representation of a velocity string configuration according to the present invention;
FIG. 4 is a schematic view of a coiled tubing hanger of the present invention;
FIG. 5 is a schematic view of the four-way assembly of the tubing head of the present invention;
FIG. 6 is a schematic view of a tree assembly of the present invention;
wherein, 1, the tubing head four-way assembly; 11. the tubing head cross; 12. a first gate valve; 13. a first embedded blind flange; 14. a first instrument flange; 15. a first pressure gauge; 16. a first shut-off valve; 17. a first throttle valve; 18. a first transition cross; 19. a first check valve; 110. a pressure transmitter; 111. a second bearing step; 112. a second jackscrew; 2. a control valve; 3. a velocity string; 31. a first bearing step; 32. a large diameter section; 33. a small diameter section; 34. a first jackscrew; 4. a coiled tubing hanger; 41. a support plate; 42. a seal ring; 43. a gasket; 44. a hanger body; 45. slips; 46. a first screw; 47. a second screw; 48. a third screw; 5. converting the flange; 6. a tree assembly; 61. a combination valve; 62. a second gate valve; 63. a second embedded blind flange; 64. a blind flange; 65. a second instrument flange; 66. a second pressure gauge; 67. a second stop valve; 68. a safety valve; 69. a second throttle valve; 610. a second transition cross; 611. a second check valve; 7. an operating window; 8. a blowout preventer; 9. a blowout prevention box; 10. an injection head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a speed pipe column, a wellhead device thereof and a coiled tubing lowering method, which are used for solving the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 3 to 4, the present invention provides a velocity string 3, which includes a velocity string body, a coiled tubing hanger 4 and a first jackscrew 34, wherein the coiled tubing hanger 4 is installed in the velocity string body, and the first jackscrew 34 can limit the position of the coiled tubing hanger 4 in the velocity string body. The speed string body comprises a large-diameter section 32, a small-diameter section 33 and a first bearing step 31 connected between the large-diameter section 32 and the small-diameter section 33, the first bearing step 31 can be in the structural forms of an inclined plane, a straight plane and the like, and the coiled tubing hanger 4 is supported by the first bearing step 31 after being installed from the large-diameter section 32. The coiled tubing hanger 4 comprises several hangers which are split along an axial cross-section, and may be, for example, split into a plurality of fan-shaped lobes, or into two semicircular lobes. Each lamella hanger comprises a part of supporting plate 41, a sealing ring 42, a hanger body 44 and slips 45 which are fixedly connected in sequence, and the supporting plate 41, the sealing ring 42, the hanger body 44 and the slips 45 which are completely and completely formed after different hangers are combined. When the hangers are combined, the coiled tubing is buckled in the middle, and the slips 45 are used for clamping the coiled tubing to suspend and support the coiled tubing. The coiled tubing hanger 4 after buckling is integrally mounted in the velocity string body in the axial direction, the inner diameter of the large diameter section 32 just can accommodate the outer diameter of the coiled tubing hanger 4, i.e., the large diameter section 32 forms radial restraint on the coiled tubing hanger 4, so that the split coiled tubing hanger 4 is clamped in the large diameter section 32 as a whole. It should be noted that after the hanger is snapped, a different hanger can be locked by a third screw 48 to further ensure integrity and locking of the relative position of the coiled tubing. The support plate 41 is provided with a support portion overlapping the first supporting step 31, and the shape of the support portion matches with the shape of the first supporting step 31. The top of hanger body 44 is provided with the slope, first jackscrew 34 radially runs through the speed tubular column body, the tip of going deep into speed tubular column body is provided with the conical surface of laminating with the slope, be located the outside tip of speed tubular column body through rotating first jackscrew 34, can make first jackscrew 34 along radial centripetal movement, through the cooperation of slope and conical surface, hanger body 44 is compelled to along axial displacement, and then, sealing washer 42 is by axial compression deformation, and the sealing washer 42 after the deformation is along radial centripetal extrusion laminating and is realized sealing on coiled tubing's outer wall. In summary, the coiled tubing hanger 4 is arranged into the plurality of split hangers, each hanger comprises a part of the support plate 41, the seal ring 42, the hanger body 44 and the slips 45 which are fixedly connected, the coiled tubing can be clamped by the slips 45 after being buckled among the plurality of hangers, axial and radial limiting can be carried out by the speed tubing string body after the coiled tubing hanger is installed in the speed tubing string body, and the seal of the seal ring 42 is realized by the first jackscrew 34, so that the support plate 41, the seal ring 42, the hanger body 44 and the slips 45 can be integrally installed, the clamping and the sealing of the coiled tubing are realized, and the installation and the use are convenient.
The hanger body 44 is provided with a tapered hole, the slips 45 are arranged in the tapered hole, and the slips 45 and the hanger body 44 of the same hanger are connected through a second screw 47 arranged in the radial direction. The support plate 41, the sealing ring 42 and the hanger body 44 of the same hanger are connected by a first screw 46 arranged axially, that is, when the hanger is in a split open state, all the parts of the same hanger are fixedly connected. In addition, the first screw 46 is screwed to the hanger body 44 after penetrating the support plate 41 and the packing 42 from the bottom to the top in this order, and at this time, the first screw 46 is slidable relative to the packing 42 and the support plate 41, and when the hanger body 44 is moved downward by the first jack screw 34, the first screw 46 is moved downward together with the hanger body 44, and the support plate 41 is not moved, and the packing 42 can be compressed and deformed. After the coiled tubing is fastened, the hanger bodies 44 of the different hangers are connected by third screws 48 perpendicular to the axial direction, and at this time, the slips 45 are fastened and fixed to the coiled tubing and supported by the first support step 31 after being installed in the large diameter section 32 of the velocity string body.
A gasket 43 can be arranged between the hanger body 44 and the sealing ring 42, similarly, the gasket 43 can be installed in a split mode according to the split condition of the hanger, the inner diameter and the outer diameter of the gasket 43 are consistent with the inner diameter and the outer diameter of the sealing ring 42, the inner diameter of the gasket 43 is used for penetrating through a continuous oil pipe, and the compression degree of the sealing ring 42 can be adjusted by replacing gaskets 43 with different thicknesses. When the spacer 43 is mounted, the first screw 46 penetrates the spacer 43, and the spacer 43 is integrally connected to the hanger body 44.
The first bearing step 31 may adopt an inner conical surface structure, the major diameter of the inner conical surface structure is equal to the diameter of the major diameter section 32, the minor diameter of the inner conical surface structure is equal to the diameter of the minor diameter section 33, the supporting portion of the supporting plate 41 adopts an outer conical surface structure, and the taper of the outer conical surface structure is equal to that of the inner conical surface structure. After the coiled tubing hanger 4 is installed in the velocity string body, the support plate 41 can be smoothly installed in place, ensuring the smoothness of the installation process and the stability of the use state after installation.
The slope surface arranged at the top of the hanger body 44 is an external conical surface arranged at the top of the hanger body, and after the coiled tubing hanger 4 is installed, no matter where the coiled tubing hanger is circumferentially arranged, the slope surface can be matched with the conical surface of the first jackscrew 34, and the operation of smoothly jacking the sealing ring 42 can be realized without rotating and positioning.
As shown in fig. 1 and fig. 5 to 6, the invention provides a wellhead device, which comprises a tubing head four-way assembly 1, wherein the tubing head four-way assembly 1 comprises a tubing head four-way 11 and an auxiliary structure thereof, the tubing head four-way 11 is connected with a velocity string 3 as described above, the tubing head four-way 11 comprises an upper port, a lower port and two side ports, the lower port is connected with an oil well, the upper port is sequentially connected with a control valve 2, the velocity string 3 and a Christmas tree assembly 6, the connection and disconnection of the oil well port can be realized through the control valve 2, and the installation of a coiled tubing is facilitated. One side port is connected with one or two first gate valves 12, and the end part is provided with a first embedded blind flange 13. The other side port is connected with a first gate valve 12, a first instrument flange 14, a first throttling valve 17 and a first check valve 19 in sequence, and a first transition four-way valve 18 is arranged between the first throttling valve 17 and the first check valve 19. And two ends of the speed pipe column body are respectively provided with a connecting flange, the connecting flange at the upper end is connected with the Christmas tree assembly 6, and the connecting flange at the lower end is connected with the control valve 2.
A first pressure gauge 15 and a pressure transmitter 110 are connected to the first gauge flange 14, the side outlet pressure is monitored, and a first shut-off valve 16 is provided on a line leading to the first pressure gauge 15. In addition, a further first pressure gauge 15 is connected to the first throttle 17, and a further first shut-off valve 16 is correspondingly provided.
Be provided with conversion flange 5 between flange and the production tree assembly 6 of speed tubular column body upper end, the lower extreme diameter of conversion flange 5 is greater than the upper end diameter, is convenient for the connection of the not subassembly of equidimension.
A second jackscrew 112 is arranged at the upper opening of the oil pipe head four-way 11 along the radial direction, a second bearing step 111 is coaxially arranged in the oil pipe head four-way 11 with the upper opening, the second bearing step 111 is used for bearing a conventional oil pipe hanger, and the second jackscrew 112 is used for fixing the conventional oil pipe hanger. If necessary, the speed pipe column 3 and the continuous oil pipe hanger 4 can be eliminated, the conventional oil pipe hanger for hanging oil pipes with different sizes is arranged, a cable is connected to the conventional oil pipe hanger, and an electric pump is added into the wellhead and connected with the cable, so that the wellhead can be reformed into an electric pump structure.
The Christmas tree assembly 6 comprises a combination valve 61 connected to the conversion flange 5 and a blind flange 64 located at the top end, a second gate valve 62 and a second embedded blind flange 63 are arranged on one side of the combination valve 61, a second gate valve 62, a second instrument flange 65, a safety valve 68, a second throttle valve 69, a second transition four-way valve 610 and a second check valve 611 are sequentially arranged on the other side of the combination valve, a second pressure gauge 66 is respectively arranged on the second instrument flange 65 and the second throttle valve 69 and used for controlling the flow rate of liquid in the well, and a second stop valve 67 is arranged on a pipeline connected with the second pressure gauge 66. The Christmas tree assembly 6 can provide a channel for oil extraction operation and control the oil extraction amount, and ensures the high-efficiency and safe delivery of the extracted oil.
With reference to fig. 2, the present invention also provides a coiled tubing lowering method, using the wellhead apparatus as described above, comprising:
the upper opening of the tubing head four-way joint 11 is sequentially connected with the control valve 2 and the velocity string 3, and the upper part of the velocity string 3 is sequentially connected with the operation window 7, the blowout preventer 8, the blowout preventer box 9 and the injection head 10;
the coiled tubing is lowered into the velocity string body through the injection head 10 and enters the well;
after the coiled tubing is put in place, connecting the coiled tubing hanger 4 with the coiled tubing, fastening the coiled tubing by a plurality of hangers through third screws 48, then installing the hangers into the speed tubing string body through an operation window 7, and supporting the hangers by means of first bearing steps 31 in the speed tubing string body;
and (4) taking down the operation window 7, the blowout preventer 8, the blowout preventer box 9 and the injection head 10 from the upper part of the velocity string 3, replacing and installing the Christmas tree assembly 6, and completing the installation of the wellhead.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A velocity string, comprising: the device comprises a speed pipe column body, a continuous oil pipe hanger and a first jackscrew; the speed pipe column body comprises a large-diameter section, a small-diameter section and a first bearing step connected between the large-diameter section and the small-diameter section; the coiled tubing hanger comprises a plurality of hangers which are split along the axial section, each hanger comprises a part of supporting plate, a sealing ring, a hanger body and a slip which are fixedly connected in sequence, the coiled tubing is buckled in the middle by the hangers, the continuous tubing is clamped by the slip, and the coiled tubing hanger is integrally and axially installed in the velocity string body; the supporting plate is provided with a supporting portion erected on the first bearing step, the top of the hanger body is provided with a slope, the first jackscrew penetrates through the speed pipe column body along the radial direction, a conical surface attached to the slope is arranged at the end of the speed pipe column body, and along with radial centripetal movement of the first jackscrew, the sealing ring is axially compressed and then attached to the outer wall of the coiled tubing in a radial centripetal extrusion mode.
2. The velocity string of claim 1, wherein: the hanger body is provided with a tapered hole, the slips are installed in the tapered hole, the same hanger is formed by connecting the supporting plate, the sealing ring and the hanger body through a first screw arranged in the axial direction, the same hanger is formed by connecting the slips and the hanger body through a second screw arranged in the radial direction, and the different hanger is formed by connecting the hanger body through a third screw perpendicular to the axial direction.
3. The velocity string of claim 2, wherein: the hanger body with be provided with the gasket between the sealing washer, the internal and external diameter of gasket with the internal and external diameter of sealing washer is unanimous, first screw runs through the gasket.
4. The velocity string of claim 1, wherein: the first bearing step is of an inner conical surface structure, the large diameter of the inner conical surface structure is equal to the diameter of the large-diameter section, the small diameter of the inner conical surface structure is equal to the diameter of the small-diameter section, the supporting portion is of an outer conical surface structure, and the taper of the outer conical surface structure is equal to that of the inner conical surface structure.
5. The velocity string of claim 1, wherein: the slope surface is an external conical surface arranged at the top end of the hanger body.
6. A wellhead assembly, characterized by: the speed string comprises a tubing head four-way joint and the speed string as claimed in any one of claims 1 to 5, wherein the tubing head four-way joint comprises an upper port, a lower port and two side ports, the lower port is connected with an oil well, the upper port is sequentially connected with a control valve, a speed string and a Christmas tree assembly, the side port is connected with a first gate valve, the side port is sequentially connected with a first gate valve, a first instrument flange, a first throttle valve and a first check valve, two ends of a speed string body are respectively provided with a connecting flange, the upper end of the speed string body is connected with the Christmas tree assembly, and the lower end of the speed string body is connected with the control valve.
7. A wellhead as claimed in claim 6, in which: and the first instrument flange is connected with a first pressure meter and a pressure transmitter.
8. The wellhead assembly according to claim 6, wherein: a conversion flange is arranged between the connecting flange at the upper end and the Christmas tree assembly, and the diameter of the lower end of the conversion flange is larger than that of the upper end.
9. A wellhead as claimed in claim 6, in which: the oil pipe head four-way joint is characterized in that a second jackscrew is arranged at the upper opening along the radial direction, a second bearing step is coaxially arranged in the oil pipe head four-way joint and the upper opening, the second bearing step is used for bearing a conventional oil pipe hanger, and the second jackscrew is used for fixing the conventional oil pipe hanger.
10. A method of coiled tubing lowering, using a wellhead assembly according to any of claims 6 to 9, comprising:
the upper opening of the four-way pipe of the tubing head is sequentially connected with a control valve and a speed pipe column, and an operation window, a blowout preventer box and an injection head are sequentially connected above the speed pipe column;
the coiled tubing is lowered into the velocity string body through the injection head and enters the well;
after the coiled tubing is lowered to the place, the coiled tubing hanger is connected with the coiled tubing and installed in the speed tubing string body through the operation window;
and taking down the operating window, the blowout preventer box and the injection head from the upper part of the velocity string, replacing and installing the Christmas tree assembly, and completing the installation of a wellhead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310220862.4A CN115949364B (en) | 2023-03-09 | 2023-03-09 | Speed pipe column, wellhead device thereof and coiled tubing lowering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310220862.4A CN115949364B (en) | 2023-03-09 | 2023-03-09 | Speed pipe column, wellhead device thereof and coiled tubing lowering method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115949364A true CN115949364A (en) | 2023-04-11 |
| CN115949364B CN115949364B (en) | 2023-06-09 |
Family
ID=85906842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310220862.4A Active CN115949364B (en) | 2023-03-09 | 2023-03-09 | Speed pipe column, wellhead device thereof and coiled tubing lowering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115949364B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117072104A (en) * | 2023-10-13 | 2023-11-17 | 大庆市天德忠石油科技有限公司 | Oil well casing head |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7455105B1 (en) * | 2005-08-08 | 2008-11-25 | Mckee Jim D | Apparatus and method for installing coiled tubing in a well |
| CN201443330U (en) * | 2009-05-20 | 2010-04-28 | 辽河石油勘探局 | Novel wellhead and oil-producing tree |
| CN103470203A (en) * | 2013-08-20 | 2013-12-25 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Velocity string hanger of coiled tubing and hanging method thereof |
| 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 |
| CN104358536A (en) * | 2014-11-10 | 2015-02-18 | 杰瑞能源服务有限公司 | Continuous oil pipe hanger for velocity tubular column |
| CN105064940A (en) * | 2015-08-21 | 2015-11-18 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Built-in continuous oil tube well completion tube column and construction method thereof |
| CN105275417A (en) * | 2015-05-19 | 2016-01-27 | 中石化重庆涪陵页岩气勘探开发有限公司 | Method for running in and out coiled tubing production string |
| CN208966249U (en) * | 2018-10-24 | 2019-06-11 | 山东科瑞井控系统制造有限公司 | A kind of compact coaxial double-pipe injection-production well mouth device |
| CN215169866U (en) * | 2021-01-27 | 2021-12-14 | 江苏腾龙石化机械有限公司 | Injection-production dual-purpose wellhead device using coiled tubing hanger |
-
2023
- 2023-03-09 CN CN202310220862.4A patent/CN115949364B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7455105B1 (en) * | 2005-08-08 | 2008-11-25 | Mckee Jim D | Apparatus and method for installing coiled tubing in a well |
| CN201443330U (en) * | 2009-05-20 | 2010-04-28 | 辽河石油勘探局 | Novel wellhead and oil-producing tree |
| CN103470203A (en) * | 2013-08-20 | 2013-12-25 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Velocity string hanger of coiled tubing and hanging method thereof |
| 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 |
| CN104358536A (en) * | 2014-11-10 | 2015-02-18 | 杰瑞能源服务有限公司 | Continuous oil pipe hanger for velocity tubular column |
| CN105275417A (en) * | 2015-05-19 | 2016-01-27 | 中石化重庆涪陵页岩气勘探开发有限公司 | Method for running in and out coiled tubing production string |
| CN105064940A (en) * | 2015-08-21 | 2015-11-18 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Built-in continuous oil tube well completion tube column and construction method thereof |
| CN208966249U (en) * | 2018-10-24 | 2019-06-11 | 山东科瑞井控系统制造有限公司 | A kind of compact coaxial double-pipe injection-production well mouth device |
| CN215169866U (en) * | 2021-01-27 | 2021-12-14 | 江苏腾龙石化机械有限公司 | Injection-production dual-purpose wellhead device using coiled tubing hanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117072104A (en) * | 2023-10-13 | 2023-11-17 | 大庆市天德忠石油科技有限公司 | Oil well casing head |
| CN117072104B (en) * | 2023-10-13 | 2024-01-09 | 大庆市天德忠石油科技有限公司 | Oil well casing head |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115949364B (en) | 2023-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5524710A (en) | Hanger assembly | |
| US3965977A (en) | Control line exiting coupling | |
| US6223819B1 (en) | Wellhead for providing structure when utilizing a well pumping system | |
| CN108019178B (en) | Construction method for plugging production pipe column under pressure in pipe | |
| CN107740683A (en) | A kind of electric submersible pump mining device for adapting to coiled tubing completion | |
| CN115949364B (en) | Speed pipe column, wellhead device thereof and coiled tubing lowering method | |
| CN109458153B (en) | Christmas tree device suitable for permanently placing and hanging coiled tubing production | |
| US11719073B2 (en) | Snub friendly wellhead hanger | |
| CN102409992A (en) | Integrated tubing hanger for underwater horizontal christmas tree | |
| WO1992008915A1 (en) | Packing assembly for oilfield equipment and method | |
| CN111364936A (en) | Speed tubular column sealing suspension device with auxiliary sealing and sealing method | |
| CN103998708A (en) | Dynamic riser string hang-off assembly | |
| CN110439496B (en) | Double-base double-well casing head device | |
| CN202485989U (en) | Underwater well-mouth-head hydrostatic pressure testing device | |
| CN113494259A (en) | Coiled tubing suspension device, coiled tubing wellhead mandrel type suspension structure and method | |
| CN202745769U (en) | Under-pressure tripping-in device of continuous tube overlong drilling tool | |
| CN109763787A (en) | A kind of device and its operating procedure of composite continuous oil pipe pulling submersible electric pump | |
| CN210483620U (en) | Cable-passing wellhead blowout preventer | |
| US20090101359A1 (en) | High Pressure Wireline Top-Entry Packoff Apparatus and Method | |
| CN221074183U (en) | Double-seal coiled tubing hanger | |
| CN114458220B (en) | Wellhead blowout preventer system for rope operation | |
| CN220101244U (en) | Large-drift-diameter integrated fracturing recoverable packer | |
| CN219953295U (en) | Multistage integral wellhead assembly | |
| CN115898315B (en) | Shale oil is with snubbing serving system of well head | |
| RU199626U1 (en) | Device for sealing the mouth of a marginal well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |