Pure electric modular subsea test tree

Patent metadata

Field	Value
Publication number	US-12060958-B2
Application number	US-202318169145-A
Country	US
Kind code	B2
Filing date	Feb 14, 2023
Priority date	Jun 29, 2022
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A pure electric modular subsea test tree is provided, which includes a connect-disconnect device, wherein the first channel is formed in the connect-disconnect device; the connect-disconnect device is provided with a locking assembly and a connection drive mechanism for driving the locking assembly, and the first electrical connection plug is embedded in the connect-disconnect device, and the connection drive mechanism is electrically connected with the first electrical connection plug; a shear-seal assembly, wherein a second channel communicated with the first channel is formed in the shear-seal assembly; the shear-seal assembly includes at least one shear-seal device capable of plugging the second channel; a connection part is formed on the shear-seal assembly; a heating device is arranged at one end of the shear-seal device far from the connection part. The disclosure relates to a pure electric modular subsea test tree, which has fast response speed and high operation safety.

First claim

What is claimed is:

1. A pure electric modular subsea test tree, comprising:
a connect-disconnect device, wherein the connect-disconnect device comprises a first outer shell and a first inner tube, wherein a first channel is formed in the first inner tube; a locking assembly and a connection drive mechanism for driving the locking assembly are arranged between the first outer shell and the first inner tube; a first electrical connection plug is embedded on a bottom end face of the first outer shell, and the connection drive mechanism is electrically connected with the first electrical connection plug;
a shear-seal assembly, wherein a second channel is formed in the shear-seal assembly, and the first channel is communicated with the second channel in a connected state; the shear-seal assembly comprises a second outer shell assembly and at least one shear-seal device arranged inside the second outer shell assembly and configured to seal the second channel; a connection part configured for locking connection with the locking assembly is formed on the second outer shell assembly; a second electrical connection plug configured for inserting and matching with the first electrical connection plug is arranged on the connection part; a heating device is arranged at one end of the shear-seal device far from the connection part, and the heating device and the shear-seal device are electrically connected with the second electrical connection plug;
the heating device comprises an inner tube, an outer tube and a plurality of electric heating rods, wherein the plurality of electric heating rods is arranged between the inner tube and the outer tube at intervals along a circumferential direction;
the connection drive mechanism is an electromagnetic driving structure;
a first magnetic member is arranged on the locking assembly, and the connection drive mechanism is used to generate a magnetic force that attracts or repels the first magnetic member, so that the locking assembly is locked and connected with the connection part;
the connection part is provided with a second magnetic member, and the connection drive mechanism is used to generate the magnetic force that attracts or repels the second magnetic member;
a positioning groove is arranged on the connection part corresponding to the locking assembly;
the locking assembly comprises a fixing ring, balls and a movable ring;
the fixing ring is arranged at an outer side of the first inner tube, and a wall thickness of the fixing ring is less than a diameter of each of the balls; through holes are arranged at intervals on a circumference surface of a side wall of the fixing ring; the balls are respectively arranged at the through holes; the movable ring is sleeved at an outer side of the fixing ring and is capable to slide relative to the fixing ring; the first magnetic member is arranged at a top of the movable ring, and a bottom of the movable ring is provided with a guide groove, a groove wall of the guide groove pushes the balls to roll and engage in the positioning groove when the guide groove is in contact with the balls; and
the connection drive mechanism comprises a first electromagnetic attraction structure and a second electromagnetic attraction structure arranged at intervals in a direction of an axis of the first channel, and the first magnetic member is arranged between the first electromagnetic attraction structure and the second electromagnetic attraction structure.

2. The pure electric modular subsea test tree according to claim 1 , wherein an outer wall of the outer tube is provided with a thermal insulation layer.

3. The pure electric modular subsea test tree according to claim 1 , wherein when the number of the shear-seal devices provided is two or more, the second outer shell assembly comprises a plurality of second outer shells and a plurality of connectors, two adjacent second outer shells are connected through the connectors, each of the shear-seal devices is arranged inside each of the second outer shells, and the heating device is sleeved in hollow interiors of the connectors;
when the number of the shear-seal devices provided is two or more, the shear-seal device closer to a top of the shear-seal assembly is an electric control ball valve mechanism, and the shear-seal device closer to a bottom of the shear-seal assembly is an electric control ball valve mechanism or an electric control flap valve mechanism.

4. The pure electric modular subsea test tree according to claim 3 , wherein:
the electric control ball valve mechanism comprises a ball valve drive device, a drive ring and a ball valve assembly;
the ball valve assembly comprises an upper valve seat, a lower valve seat and a ball valve body, wherein the upper valve seat and the lower valve seat are arranged in the second outer shell; the ball valve body is rotatably arranged in a valve cavity formed between the upper valve seat and the lower valve seat; the ball valve body is provided with a shear notch, and the ball valve body rotates to close the second channel;
the ball valve drive device is arranged on an inner side wall of the second outer shell and at a bottom of the ball valve assembly; the drive ring connects the ball valve drive device and the ball valve body; the ball valve drive device is used to drive the drive ring to slide along an axial direction to drive the ball valve body to rotate.

5. The pure electric modular subsea test tree according to claim 4 , wherein:
on a side wall of the ball valve body and on an axis where a center of a circle is located, bosses are symmetrically arranged along the radial direction, first guide grooves are arranged on an inner wall of the drive ring, and each of the bosses is capable to slide relative to the first guide groove correspondingly;
the side wall of the ball valve body is symmetrically provided with second guide grooves deviating from a center of the ball valve body, and the inner wall of the drive ring is provided with drive blocks correspondingly inserted in the second guide groove;
when the drive ring slides along the axial direction, the drive blocks push the ball valve body to rotate.

6. The pure electric modular subsea test tree according to claim 4 , wherein the ball valve drive device is a hollow shaft motor, and the drive ring is threaded with a rotor of the hollow shaft motor.

7. The pure electric modular subsea test tree according to claim 4 , wherein a second inner tube is arranged inside the second outer shell, the drive ring is sleeved at an outer side the second inner tube, and a spring is connected between the lower valve seat and a top end of the second inner tube.

8. The pure electric modular subsea test tree according to claim 3 , wherein:
the electric control flap valve mechanism comprises a valve body, a second electromagnetic drive assembly and a third inner pipe; the valve body comprises a valve seat and a valve flap, and a torsion spring configured to control the valve flap in closed state is arranged between the valve flap and the valve seat;
wherein, the second electromagnetic drive assembly is arranged on an inner side wall of the second outer shell, the third inner pipe is sleeved in the second outer shell, and a diameter of the third inner pipe is smaller than a diameter of an opening of the valve seat;
the third inner pipe is capable to penetrate the opening of the valve seat and make the valve flap open towards a bottom side of the second outer shell; a third magnetic member is arranged at one end of the third inner pipe; the second electromagnetic drive assembly is used to drive the third inner pipe to slide, so as to make the valve flap open or close.

9. The pure electric modular subsea test tree according to claim 7 , wherein

Assignees

• Univ Southwest Petroleum

Inventors

• Tang Yang
• Zhang Yulin
• Wang Guorong
• He Yufa
• Wei Jianfei
• Zhao Jinhai
• Li Zeliang
• Wang Jinzhong
• Li Wang
• Tong Wujun
• Wang Jie

Classifications

• E21B36/04

  using electrical heaters · CPC title

• E21B34/04

  in underwater well heads · CPC title

• E21B33/035

  specially adapted for underwater installations (E21B33/043, E21B33/064, E21B33/076 take precedence) · CPC title

• E21B47/001 Primary

  for underwater installation · CPC title

• F16L53/38

  using elongate electric heating elements, e.g. wires or ribbons · CPC title