Double-electric-pump multi-way hydraulic silt-proof underwater tubing hanger

Abstract

The invention discloses a multi-way hydraulic silt-proof underwater tubing hanger with double electric pumps. Comprising an oil pipe hanger body, a locking ring and a locking driving ring, and an axial production channel is formed in the center of the oil pipe hanger body; the first limiting shoulder and the second limiting shoulder are respectively arranged on the peripheries of the upper part and the middle part of the tubing hanger body; the six electric through holes are formed in the oil pipe hanger body in parallel with the axial direction in a penetrating mode. The two annular hollow holes are formed in the upper part of the tubing hanger body on the periphery of the production channel in parallel with the axial direction; the lower end of the annular hole is connected with an inclined hole used for being communicated with the outside of the oil pipe hanger body, and the outer end of the inclined hole is located between the first limiting shoulder and the second limiting shoulder. The double-electric pump has the beneficial effects that the six electric through holes are formed, so that the use requirement of the double-electric pump can be met, and the space is saved; and two annular hollow holes are formed, so that water can be effectively drained, and the influence of deposited silt on contraction and unlocking of the locking ring is avoided.

Description

Technical Field

[0001] This invention relates to the field of offshore oilfield technology, and in particular to a dual-pump, multi-channel hydraulic anti-mud and sand subsea tubing hanger. Background Technology

[0002] The tubing hanger is an essential component of a subsea horizontal production tree. Located inside the production tree, its function is to suspend the tubing string and seal it with the production tree body to form an annulus and production channel. It also provides an interface and channel for downhole control.

[0003] Existing tubing hangers typically have only one power cable pass-through port for a single 3-core cable. This port occupies considerable space and can only accommodate a single electric pump. Because it cannot effectively remove sand, the deposited silt can affect the locking ring's contraction and unlocking, thus impacting the normal operation of the tubing hanger. Furthermore, when the existing locking ring is locked, the contact surface between it and the lower insertion part of the locking drive ring is a conical surface. This conical surface generates an upward force that can cause the locking drive ring to move upwards, posing a risk of mis-locking. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-pump, multi-channel hydraulic anti-mud and sand underwater oil pipe hanger, which has 6 electrical through holes, which can meet the usage requirements of dual electric pumps and save space.

[0005] Another objective of this invention is to provide a dual-pump, multi-channel hydraulic anti-mud underwater oil pipe hanger, which has two annular holes to effectively drain water and prevent deposited mud and sand from affecting the contraction and unlocking of the locking ring.

[0006] To achieve the above objectives, the present invention adopts the following technical solution, including: The tubing hanger body, including a locking ring and a locking drive ring, has an axial production channel at its center. Its features include: The first limiting shoulder and the second limiting shoulder are respectively located on the outer periphery of the upper and middle parts of the tubing hanger body; Six electrical through holes are respectively arranged parallel to the axial direction on the body of the tubing hanger, for six single-core cables to pass through respectively, and wet connectors are provided at the upper end of each of the six electrical through holes. Two annular holes are arranged parallel to the axial direction on the upper part of the tubing hanger body on the outer periphery of the production channel; at the lower end of the annular holes, there is an oblique hole for connecting to the outside of the tubing hanger body. The outer end of the oblique hole is located between the first limiting shoulder and the second limiting shoulder, which is used to discharge mud and sand to prevent mud and sand from affecting the contraction and unlocking of the locking ring.

[0007] Preferably, the locking ring is sleeved on the upper part of the tubing hanger body; the lower end of the locking ring abuts against the first limiting shoulder, and an insertion groove is provided on the inner circumference of the upper part of the locking ring; the inner circumference of the upper part of the insertion groove is a first cylindrical surface, and the inner circumference of the lower part of the insertion groove is a first conical surface; the inner circumference of the lower part of the locking ring is a second cylindrical surface; the first cylindrical surface, the first conical surface and the second cylindrical surface are smoothly connected; an insertion part adapted to the insertion groove is provided at the lower end of the locking drive ring; the insertion part is used to insert between the tubing hanger body and the second cylindrical surface, so that the locking ring expands radially.

[0008] Preferably, the tubing hanger body has a single DHPTT temperature and pressure sensor through hole parallel to the axial direction; a DHPTT temperature and pressure sensor through connector is radially arranged in the middle of the tubing hanger body; the single DHPTT temperature and pressure sensor through connector is connected to the starting end of the single DHPTT temperature and pressure sensor through hole; and a downhole temperature and pressure sensor is connected to the lower end of the DHPTT temperature and pressure sensor through hole.

[0009] Preferably, the tubing hanger body has 7 hydraulic through holes parallel to the axial direction; 7 hydraulic through joints are radially arranged in the middle part of the tubing hanger body; the 7 hydraulic through joints are respectively connected to the starting end of the 7 hydraulic through holes; and adapter rods are respectively connected to the lower end of the hydraulic through holes.

[0010] Preferably, it also includes: The downhole chemical injection port is arranged parallel to and axially on the tubing hanger body; The downhole chemical injection connector has a radially located middle section of the tubing hanger body and is connected to the upper end of the downhole chemical injection port.

[0011] Preferably, a first metal sealing assembly is provided below the second limiting shoulder; the first metal sealing assembly includes: a C-ring, which is mounted on the tubing hanger body by a plurality of locking bolts; a metal sealing bearing ring, which is disposed on the outer periphery of the C-ring; and a metal sealing ring, which is sleeved on the outer periphery of the tubing hanger body, with its lower end abutting against the metal sealing bearing ring.

[0012] Preferably, a second metal sealing assembly is provided at the horizontal channel of the tubing hanger body; the second metal sealing assembly includes a first metal sealing ring, an annular sleeve, a second metal sealing ring, a third metal sealing ring, a metal sealing retaining ring, and a metal sealing carrier ring, which are sequentially fitted onto the tubing hanger body from top to bottom; the lower end face of the first metal sealing ring and the upper end face of the second metal sealing ring are respectively provided with sealing ring grooves; the upper end face and the lower end face of the annular sleeve are respectively provided with sealing protrusions adapted to the sealing ring grooves, and the annular sleeve is provided with a side opening corresponding to the horizontal channel.

[0013] Preferably, it also includes: The upper body is disposed within the locking drive ring, and the lower end of the upper body is connected to the oil pipe hanger body; A positioning slot is provided at the upper end of the tubing hanger body; The lower end of the first positioning key is inserted into the positioning slot. A chute is provided parallel to the axial direction on the side wall of the upper body; A slider is disposed on the outer wall of the first positioning key and is adapted to the groove.

[0014] Preferably, it also includes: The second positioning key is located in the middle of the tubing hanger body.

[0015] Preferably, it also includes: A guide shaft is detachably disposed at the lower end of the tubing hanger body; A guide key is provided on the outer peripheral wall at the lower end of the guide shaft.

[0016] The beneficial effects of this invention are: it has 6 electrical penetration holes, which can meet the needs of dual electric pumps and save space; it has 2 annular holes, which can effectively drain water and prevent the sediment from affecting the contraction and unlocking of the locking ring; the lower inner circumference of the locking ring is a second cylindrical surface, and the contraction force generated by the locking ring is radially inward and will not generate an upward component force, thus preventing the locking ring from mis-locking. Attached Figure Description

[0017] Figure 1 This invention relates to a three-dimensional underwater oil pipe hanger with dual electric pumps and multiple hydraulic anti-mud and sand functions. Figure 1 .

[0018] Figure 2 This invention relates to a three-dimensional underwater oil pipe hanger with dual electric pumps and multiple hydraulic anti-mud and sand functions. Figure 2 .

[0019] Figure 3 This is a top view of a dual-pump, multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to the present invention.

[0020] Figure 4 for Figure 3 BB cross-sectional view.

[0021] Figure 5 for Figure 3 CC section view.

[0022] Figure 6 for Figure 4 A magnified view of point A.

[0023] Figure 7 for Figure 4 Enlarged view at point B.

[0024] Figure 8 for Figure 4 A magnified view at point C. Detailed Implementation

[0025] The invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0026] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0027] like Figure 1-8 As shown, a dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger 1 of the present invention includes: an oil pipe hanger body 110, a locking ring 120, a locking drive ring 130, and an axial production channel 111 provided at the center of the oil pipe hanger body 110. It also includes: The first limiting shoulder 112 and the second limiting shoulder 113 are respectively disposed on the outer periphery of the upper and middle parts of the tubing hanger body 110; Six electrical through holes 114 are respectively arranged parallel to the axial direction on the body 110 of the tubing hanger, for six single-core cables to pass through respectively, and wet connectors are provided at the upper end of each of the six electrical through holes 114. Two annular holes 115 are arranged parallel to the axial direction on the upper part of the tubing hanger body 110 on the outer periphery of the production channel; at the lower end of the annular holes 115, there is an oblique hole 116 for connecting to the outside of the tubing hanger body 110. The outer end of the oblique hole 116 is located between the first limiting shoulder 112 and the second limiting shoulder 113, and is used to discharge mud and sand to prevent mud and sand from affecting the contraction and unlocking of the locking ring 120.

[0028] During use, mud and sand can be discharged through two annular holes 115 to prevent them from affecting the locking ring 120. Six single-core cables pass through six electrical penetration holes 114 to meet the requirements of dual electric pumps.

[0029] In another embodiment, the locking ring 120 is sleeved on the upper part of the tubing hanger body 110; the lower end of the locking ring 120 abuts against the first limiting shoulder 112, and an insertion groove 121 is provided on the upper inner circumference of the locking ring 120; the upper inner circumference of the insertion groove 121 is a first cylindrical surface 122, and the lower inner circumference of the insertion groove 121 is a first conical surface 123; the lower inner circumference of the locking ring is a second cylindrical surface 124; the first cylindrical surface 122, the first conical surface 123, and the second cylindrical surface 124 are smoothly connected; an insertion part 131 adapted to the insertion groove 121 is provided at the lower end of the locking drive ring 130; the insertion part 131 is used to insert between the tubing hanger body 110 and the second cylindrical surface 124, so that the locking ring 120 expands radially.

[0030] In another embodiment, a DHPTT temperature and pressure sensor through hole parallel to the axial direction is provided on the tubing hanger body 110; a DHPTT temperature and pressure sensor through connector 141a is radially provided in the middle of the tubing hanger body 110; the DHPTT temperature and pressure sensor through connector 141a is connected to the starting end of the DHPTT temperature and pressure sensor through hole; and a downhole temperature and pressure sensor is connected to the lower end of the DHPTT temperature and pressure sensor through hole.

[0031] In another embodiment, the tubing hanger body 110 is provided with 7 hydraulic through holes parallel to the axial direction; 7 hydraulic through joints 142a are radially provided in the middle part of the tubing hanger body 110; the 7 hydraulic through joints 142a are respectively connected to the starting end of the 7 hydraulic through holes; and adapter rods 142b are respectively connected to the lower end of the hydraulic through holes 142.

[0032] In another embodiment, it further includes: a downhole chemical injection hole is arranged parallel to and axially on the tubing hanger body 110; a downhole chemical injection connector 143a is radially provided in the middle of the tubing hanger body 110 and connected to the upper end of the downhole chemical injection hole.

[0033] In another embodiment, a first metal sealing assembly 150 is provided below the second limiting shoulder 113; the first metal sealing assembly 150 includes: a C-ring 152 disposed on the tubing hanger body 110 by a plurality of locking bolts 151; a metal sealing bearing ring 153 disposed on the outer periphery of the C-ring; and a metal sealing ring 154 sleeved on the outer periphery of the tubing hanger body 110, with its lower end abutting against the metal sealing bearing ring 153.

[0034] In another embodiment, a second metal sealing assembly 160 is provided at the horizontal channel of the tubing hanger body 110; the second metal sealing assembly 160 includes a first metal sealing ring 161, an annular sleeve 162, a second metal sealing ring 163, a third metal sealing ring 164, a metal sealing retaining ring 165, and a metal sealing carrier ring 166, which are sequentially fitted onto the tubing hanger body from top to bottom; the lower end face of the first metal sealing ring 161 and the upper end face of the second metal sealing ring 163 are respectively provided with sealing ring grooves; the upper end face and the lower end face of the annular sleeve 162 are respectively provided with sealing protrusions adapted to the sealing ring grooves; and the annular sleeve 162 is provided with a side opening corresponding to the horizontal channel.

[0035] In another embodiment, it further includes: an upper body 170 disposed within the locking drive ring 130, the lower end of the upper body 170 being connected to the tubing hanger body 110; a positioning slot disposed at the upper end of the tubing hanger body 110; the lower end of the first positioning key 171 being inserted into the positioning slot; a sliding groove 172 disposed parallel to the axial direction on the side wall of the upper body 170; and a slider 171a disposed on the outer side wall of the first positioning key 161 and adapted to the sliding groove 172.

[0036] In another embodiment, a second positioning key 180 is disposed in the middle of the tubing hanger body 110.

[0037] In another embodiment, it further includes: a guide shaft 191 detachably disposed at the lower end of the tubing hanger body 110; and a guide key 192 disposed on the outer peripheral wall of the lower end of the guide shaft 191.

[0038] In summary, the present invention provides a dual-pump, multi-channel hydraulic anti-mud and sand underwater oil pipe hanger 1, which has 6 electrical penetration holes 114, which can meet the usage requirements of dual electric pumps and save space; it has 2 annular holes 115, which can effectively drain water and prevent the deposited mud and sand from affecting the contraction and unlocking of the locking ring 120; the lower inner circumference of the locking ring 120 is a second cylindrical surface 124, and the contraction force generated by the locking ring 120 is radially inward, without generating an upward component force, thus preventing the locking ring 120 from mis-locking.

[0039] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A dual-pump, multi-channel hydraulic anti-mud and sand underwater tubing hanger, comprising a tubing hanger body, a locking ring, and a locking drive ring, wherein an axial production channel is provided at the center of the tubing hanger body, characterized in that... Also includes: The first limiting shoulder and the second limiting shoulder are respectively located on the outer periphery of the upper and middle parts of the tubing hanger body; Six electrical through holes are respectively arranged parallel to the axial direction on the body of the tubing hanger, for six single-core cables to pass through respectively, and wet connectors are provided at the upper end of each of the six electrical through holes. Two annular holes are arranged parallel to the axial direction on the upper part of the tubing hanger body on the outer periphery of the production channel; at the lower end of the annular holes, there is an oblique hole for connecting to the outside of the tubing hanger body. The outer end of the oblique hole is located between the first limiting shoulder and the second limiting shoulder, which is used to discharge mud and sand to prevent mud and sand from affecting the contraction and unlocking of the locking ring.

2. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that: The locking ring is sleeved on the upper part of the tubing hanger body; the lower end of the locking ring abuts against the first limiting shoulder, and an insertion groove is provided on the inner circumference of the upper part of the locking ring; the inner circumference of the upper part of the insertion groove is a first cylindrical surface, and the inner circumference of the lower part of the insertion groove is a first conical surface; the inner circumference of the lower part of the locking ring is a second cylindrical surface; the first cylindrical surface, the first conical surface and the second cylindrical surface are smoothly connected; an insertion part adapted to the insertion groove is provided at the lower end of the locking drive ring; the insertion part is used to insert between the tubing hanger body and the second cylindrical surface, so that the locking ring expands radially.

3. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that: The tubing hanger body is provided with a single DHPTT temperature and pressure sensor through hole parallel to the axial direction; a DHPTT temperature and pressure sensor through connector is provided radially in the middle of the tubing hanger body; the single DHPTT temperature and pressure sensor through connector is connected to the starting end of the single DHPTT temperature and pressure sensor through hole; a downhole temperature and pressure sensor is connected to the lower end of the DHPTT temperature and pressure sensor through hole.

4. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that: The tubing hanger body is provided with 7 hydraulic through holes parallel to the axial direction; 7 hydraulic through joints are radially provided in the middle part of the tubing hanger body; the 7 hydraulic through joints are respectively connected to the starting end of the 7 hydraulic through holes; and adapter rods are respectively connected to the lower end of the hydraulic through holes.

5. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that, Also includes: The downhole chemical injection port is arranged parallel to and axially on the tubing hanger body; The downhole chemical injection connector has a radially located middle section of the tubing hanger body and is connected to the upper end of the downhole chemical injection port.

6. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that: A first metal sealing assembly is provided below the second limiting shoulder; the first metal sealing assembly includes: a C-ring, which is set on the tubing hanger body by a plurality of locking bolts; a metal sealing bearing ring, which is set on the outer periphery of the C-ring; and a metal sealing ring, which is sleeved on the outer periphery of the tubing hanger body, with its lower end abutting against the metal sealing bearing ring.

7. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that: A second metal sealing assembly is provided at the horizontal channel of the tubing hanger body; the second metal sealing assembly includes a first metal sealing ring, an annular sleeve, a second metal sealing ring, a third metal sealing ring, a metal sealing retaining ring, and a metal sealing carrier ring, which are sequentially fitted onto the tubing hanger body from top to bottom; the lower end face of the first metal sealing ring and the upper end face of the second metal sealing ring are respectively provided with sealing ring grooves; the upper end face and the lower end face of the annular sleeve are respectively provided with sealing protrusions that are adapted to the sealing ring grooves; and the annular sleeve is provided with a side opening corresponding to the horizontal channel.

8. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that, Also includes: The upper body is disposed within the locking drive ring, and the lower end of the upper body is connected to the oil pipe hanger body; A positioning slot is provided at the upper end of the tubing hanger body; The lower end of the first positioning key is inserted into the positioning slot. A chute is provided parallel to the axial direction on the side wall of the upper body; A slider is disposed on the outer wall of the first positioning key and is adapted to the groove.

9. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that, Also includes: The second positioning key is located in the middle of the tubing hanger body.

10. The dual-pump multi-channel hydraulic anti-mud and sand underwater oil pipe hanger according to claim 1, characterized in that, Also includes: A guide shaft is detachably disposed at the lower end of the tubing hanger body; A guide key is provided on the outer peripheral wall at the lower end of the guide shaft.

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