Coiled tubing four-blade blowout preventer hanger and method of use

Abstract

The present application relates to the technical field of oil exploitation, and particularly relates to a coiled tubing four-gate blowout preventer suspension device and a use method thereof. The technical scheme is as follows: a ring seal actuator is installed in the inner cavity of a ring seal actuator receiving cylinder, a suspension actuator receiving cylinder is installed at the lower side of the ring seal actuator receiving cylinder, a suspension actuator is installed in the inner cavity of the suspension actuator receiving cylinder, and the full seal and shearing device, the ring seal actuator receiving cylinder and the suspension actuator receiving cylinder are connected and fixed through a plurality of connecting bolts. The beneficial effects are as follows: the present application adopts a long strip cylindrical rubber expansion body, which is in contact with the coiled tubing through a suspension connecting wall, thereby increasing the contact area with the outer wall of the coiled tubing and effectively realizing the suspension function of the coiled tubing; in addition, the present application also adopts a ring seal rubber expansion body of the ring seal actuator, which can effectively realize the ring seal blowout prevention function of the coiled tubing by using the sealing contact surface and the self-sealing structure designed thereby, and the service life of the coiled tubing is improved.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, and in particular to a coiled tubing four-gate blowout preventer suspension device and its usage method. Background Technology

[0002] Coiled tubing is a flexible, continuous pipe wound around a large drum. It's an integral part of well workover operations in the oil and gas industry. Unlike traditional jointed tubing, coiled tubing eliminates the need for multiple connections and can be seamlessly inserted into the well. This technology has revolutionized all aspects of well maintenance, including production enhancement treatments, cleanup, and even drilling operations in certain situations. By using coiled tubing, operators can access deep or deviated wells more efficiently while minimizing downtime, resulting in significant time and cost savings compared to traditional methods.

[0003] During coiled tubing construction, a four-gate blowout preventer (BOP) is an essential safety device. Primarily used to prevent blowouts during coiled tubing operations, the four-gate BOP is hydraulically driven, offering fast response and a high safety factor. Currently, the suspension function of the four-gate BOP is achieved through suspension slips. A hydraulic system drives the slips to compress the coiled tubing, thus suspending it. However, this method has a drawback: because the existing suspension slips are metal, they require compression of the coiled tubing wall to secure it. Repeated compression can cause localized deformation of the coiled tubing's outer wall, affecting its lifespan. Since coiled tubing is expensive, especially for deep wells, there is a pressing need to design an improved four-gate BOP suspension device to extend the service life of the coiled tubing. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned deficiencies in the existing technology by providing a four-gate blowout preventer suspension device and its usage method for coiled tubing. This invention employs a long, cylindrical rubber expansion body as the suspension actuator, which contacts the coiled tubing through the suspension connecting wall. This not only increases the contact area with the outer wall of the coiled tubing but also effectively achieves the suspension function of the coiled tubing. Furthermore, this invention also uses a ring-sealing rubber expansion body of the ring-sealing actuator. Utilizing its designed sealing contact surface and self-sealing structure, it can effectively achieve the ring-sealing blowout prevention function of the coiled tubing.

[0005] The technical solution of the four-gate blowout preventer suspension device for coiled tubing mentioned in this invention is as follows: It includes connecting bolts, a ring seal actuator receiving cylinder, a suspension actuator receiving cylinder, a ring seal actuator, and a suspension actuator. The ring seal actuator receiving cylinder has a ring seal actuator installed inside its inner cavity, and a suspension actuator receiving cylinder is installed on the lower side of the ring seal actuator receiving cylinder. The suspension actuator receiving cylinder has a suspension actuator installed inside its inner cavity. Multiple connecting bolts connect and fix the full seal and shearing device, the ring seal actuator receiving cylinder, and the suspension actuator receiving cylinder. The suspension actuator includes a rubber expansion body, a power chamber, a suspension connecting wall, and a fluid inlet. The power chamber is located within the rubber expansion body, and a fluid inlet is located on the outer wall of the rubber expansion body. A suspension connecting wall for contacting the outer wall of the coiled tubing is located at the center of the rubber expansion body. A hydraulic device is connected to a fluid inlet nozzle installed at the fluid inlet via hydraulic lines.

[0006] Preferably, the aforementioned suspended actuator receiving cylinder includes a wellhead connecting flange, a suspended actuator receiving cylinder body, a bottom plug, wellhead bolt connection holes, blowout preventer assembly connection holes, a blowout preventer sealing groove, and a steel ring sealing groove. The wellhead connecting flange is installed on the top of the suspended actuator receiving cylinder body, the bottom plug is installed on the bottom of the suspended actuator receiving cylinder body, and the suspended actuator is installed in the inner cavity of the suspended actuator receiving cylinder body. A blowout preventer sealing groove is provided on the upper side of the wellhead connecting flange, a steel ring sealing groove is provided on the lower side, and multiple wellhead bolt connection holes are provided on the outer side. Multiple blowout preventer assembly connection holes are installed on the suspended actuator receiving cylinder body for installing connecting bolts.

[0007] Preferably, the bottom plug has a circular through hole at its center to facilitate the passage of a continuous oil pipe; the bottom plug is threaded to the lower end of the cylinder liner body of the suspension actuator, the inner diameter of the bottom plug is smaller than the inner diameter of the cylinder liner body of the suspension actuator, and the top of the bottom plug has a support step for supporting the suspension actuator; an assembly process hole is provided at the bottom end of the bottom plug.

[0008] Preferably, the aforementioned ring seal actuator receiving cylinder includes a ring seal actuator cylinder body, an assembly hole, a ring seal actuator receiving cavity, a continuous oil pipe passage cavity, a planar sealing groove, a ring seal liquid inlet actuator hole, a suspension liquid inlet actuator hole, and a suspension actuator upper receiving cavity. The ring seal actuator cylinder body has a ring seal actuator receiving cavity, a continuous oil pipe passage cavity, and a suspension actuator upper receiving cavity at its center, and the continuous oil pipe passage cavity is located between the ring seal actuator receiving cavity and the suspension actuator upper receiving cavity. The outer diameter of the continuous oil pipe passage cavity is smaller than the outer diameter of the ring seal actuator receiving cavity and the suspension actuator upper receiving cavity. Multiple assembly holes are axially provided on the outer wall of the ring seal actuator cylinder body for installing connecting bolts. A ring seal liquid inlet actuator hole is provided at the upper part and a suspension liquid inlet actuator hole is provided at the lower part of the outer wall of the ring seal actuator cylinder body. Planar sealing grooves are provided at the top and bottom ends of the ring seal actuator cylinder body, respectively.

[0009] Preferably, the above-mentioned ring seal actuator includes a ring seal rubber expansion body, a ring seal power chamber, and a ring seal liquid inlet. The ring seal rubber expansion body has a circular through hole at its center to facilitate the passage of a continuous oil pipe. The inner cavity of the ring seal rubber expansion body has a ring seal power chamber, and the outer wall of the ring seal rubber expansion body has a ring seal liquid inlet, which is connected to a hydraulic device by installing a liquid inlet nozzle and a hydraulic pipeline.

[0010] Preferably, the above-mentioned ring-sealing rubber expansion body has a sealing contact surface at its center for contacting and engaging with the outer wall of the continuous tubing, and self-sealing structures are provided at both ends of the sealing contact surface; when hydraulic oil is injected, the outer wall of the ring-sealing rubber expansion body expands and deforms towards the center under the support of the ring-sealing actuator cylinder, so that the sealing contact surface is in close contact with the outer wall of the continuous tubing.

[0011] Preferably, the rubber expansion body is a hollow elongated cylindrical structure, and the inner wall of the suspension connection wall is a reverse toothed structure. Under hydraulic action, the rubber expansion body of the suspension actuator contacts and locks against the outer wall of the continuous oil pipe, so that the continuous oil pipe is in a static suspension state.

[0012] Preferably, the sealing contact surface of the inner wall of the aforementioned ring-sealing rubber expansion body has a structure in which the inner diameter at the center gradually increases to the inner diameter at both ends, and the self-sealing structure at both ends of the ring-sealing rubber expansion body is a triangular notch structure; under hydraulic action, the ring-sealing rubber expansion body of the ring-sealing actuator contacts and locks against the outer wall of the continuous oil pipe, thereby playing the role of ring sealing.

[0013] The method of using the coiled tubing four-gate blowout preventer suspension device mentioned in this invention includes the following steps:

[0014] 1. Assemble the suspension device for the coiled tubing four-gate blowout preventer. Install the annular seal actuator receiving cylinder below the full sealing and shearing device of the coiled tubing four-gate blowout preventer. Install the suspension actuator receiving cylinder below the annular seal actuator receiving cylinder. Install the annular seal actuator inside the annular seal actuator receiving cylinder and the suspension actuator inside the suspension actuator receiving cylinder. Connect the inlet nozzle of the annular seal inlet hole on the annular seal rubber expansion body of the annular seal actuator to the hydraulic device through a hydraulic line passing through the annular seal inlet actuator hole. Connect the inlet nozzle installed at the inlet hole of the suspension actuator's rubber expansion body to the hydraulic device through a hydraulic line passing through the suspension inlet actuator hole. Then, pass the connecting bolts from top to bottom through the full sealing and shearing device, the annular seal actuator receiving cylinder, and the suspension actuator receiving cylinder. Finally, install the suspension actuator receiving cylinder at the lower part of the wellhead through the wellhead connecting flange.

[0015] 2. When it is necessary to suspend the coiled tubing, hydraulic oil is injected into the rubber expansion body of the suspension actuator through the hydraulic device. The hydraulic oil enters the power chamber inside the rubber expansion body. Since the outer wall of the rubber expansion body is attached to the inner wall of the cylinder liner body of the suspension actuator, the hydraulic oil pushes the inner wall of the rubber expansion body to be squeezed and deformed inward, thereby pushing the suspension connecting wall to lock onto the outer wall of the coiled tubing, so that the coiled tubing is in a static suspension state.

[0016] 3. When ring sealing of the coiled tubing is required, hydraulic oil is injected into the ring sealing rubber expansion body of the ring sealing actuator via a hydraulic device. The hydraulic oil enters the ring sealing power chamber inside the ring sealing rubber expansion body. Since the outer wall of the ring sealing rubber expansion body is attached to the inner wall of the ring sealing actuator cylinder, the hydraulic oil pushes the inner wall of the ring sealing rubber expansion body inward to deform it, thereby pushing the sealing contact surface to press tightly against the outer wall of the coiled tubing. Because the sealing contact surface of the inner wall of the ring sealing rubber expansion body has a structure in which the inner diameter at the center gradually increases to the inner diameter at both ends, and the self-sealing structure at both ends of the ring sealing rubber expansion body is a triangular notch structure; under the action of hydraulic pressure, the ring sealing rubber expansion body contacts and locks tightly against the outer wall of the coiled tubing, playing a ring sealing and anti-blowout role.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] I. This invention replaces the original metal slips with rubber expansion bodies, changing the original rigid connection and suspension between the slips and the outer wall of the coiled tubing to a flexible connection and suspension. The rubber expansion body not only provides excellent protection for the coiled tubing, extending its service life and thus improving economic efficiency, but also the long cylindrical rubber expansion body can effectively hold the coiled tubing, enabling it to achieve a suspension function and avoiding the problem of the coiled tubing wall being squeezed and deformed, leading to premature scrapping of the coiled tubing.

[0019] Second, this invention also adds a ring seal actuator receiving cylinder and a ring seal actuator. Utilizing the sealing contact surface and self-sealing structure designed on the ring seal actuator, effective sealing and anti-spraying functions can be achieved. The ring seal liquid inlet and suspension liquid inlet designed on the ring seal actuator receiving cylinder deliver hydraulic oil through hydraulic pipelines to the ring seal rubber expansion body and the rubber expansion body inside the suspension actuator, so that the ring seal rubber expansion body and the rubber expansion body can expand and deform towards the center, thereby achieving the suspension and ring sealing functions.

[0020] Third, by lowering the suspension actuator and the suspension actuator receiving cylinder into the lower part of the wellhead, this invention reduces the space occupied by the above-ground part of the four-gate blowout preventer, makes full use of the space resources of the oil well, greatly improves the safety factor of the entire four-gate blowout preventer, expands the application range of coiled tubing, and reduces the original limitations of the four-gate blowout preventer on the application range of coiled tubing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the suspension actuator receiving cylinder;

[0023] Figure 3 This is a schematic diagram of the suspension actuator;

[0024] Figure 4 yes Figure 3 A schematic diagram of the AA structure in the diagram;

[0025] Figure 5 This is a schematic diagram of the structure of the ring seal actuator receiving cylinder;

[0026] Figure 6 This is a schematic diagram of the ring seal actuator;

[0027] Figure 7 yes Figure 6 A schematic diagram of the BB structure in the image;

[0028] Figure 8 This is a schematic diagram of the full-sealing and shearing device;

[0029] In the diagram: 1. Full sealing and shearing device; 2. Ring sealing actuator receiving cylinder; 3. Connecting bolt; 4. Suspension actuator receiving cylinder; 5. Ring sealing actuator; 6. Suspension actuator; 7. Coiled tubing; 8. Blowout preventer body. 1.1 Full sealing device; 1.2 Shearing device; 1.3 Coupling device; 1.4 Ring sealing actuator cylinder body; 2.1 Assembly hole; 2.2 Ring sealing actuator receiving cavity; 2.3 Coiled tubing passage cavity; 2.4 Flat sealing groove; 2.5 Ring sealing fluid inlet actuation hole; 2.6 Suspension fluid inlet actuation hole; 2.7 Suspension actuator upper receiving cavity. 2.8 Wellhead connecting flange 4.1 Suspension actuator receiving cylinder body 4.2 Bottom plug 4.3 Wellhead bolt connection hole 4.4 Blowout preventer assembly connection hole 4.5 Blowout preventer sealing groove 4.6 Steel ring sealing groove 4.7 Assembly process hole 4.8 Weld joint 4.9 Ring seal rubber expansion body 5.1 Ring seal power chamber 5.2 Ring seal fluid inlet 5.3 Sealing contact surface 5.4 Self-sealing structure 5.5 Rubber expansion body 6.1 Power chamber 6.2 Suspension connecting wall 6.3 Fluid inlet 6.4 Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] Example 1, referring to Figures 1-7The present invention discloses a four-gate blowout preventer suspension device for continuous tubing, comprising connecting bolts 3, a ring seal actuator receiving cylinder 2, a suspension actuator receiving cylinder 4, a ring seal actuator 5, and a suspension actuator 6. The ring seal actuator 5 is installed inside the ring seal actuator receiving cylinder 2, the suspension actuator receiving cylinder 4 is installed below the ring seal actuator receiving cylinder 2, and the suspension actuator 6 is installed inside the suspension actuator receiving cylinder 4. The ring seal actuator and the shearing device 1 are connected by multiple connecting bolts 3. Cylinder 2 and the suspension actuator receiving cylinder 4 are connected and fixed; the suspension actuator 6 includes a rubber expansion body 6.1, a power chamber 6.2, a suspension connecting wall 6.3, and a liquid inlet 6.4. The power chamber 6.2 is provided inside the rubber expansion body 6.1, and a liquid inlet 6.4 is provided on the outer wall of the rubber expansion body 6.1. A suspension connecting wall 6.3 for contacting the outer wall of the continuous oil pipe 7 is provided at the center of the rubber expansion body 6.1. The hydraulic device is connected to the liquid inlet nozzle installed at the liquid inlet 6.4 through hydraulic pipelines.

[0032] Reference Figure 2 The suspended actuator receiving cylinder 4 mentioned in this invention includes a wellhead connecting flange 4.1, a suspended actuator receiving cylinder body 4.2, a bottom plug 4.3, wellhead bolt connection holes 4.4, blowout preventer assembly connection holes 4.5, a blowout preventer sealing groove 4.6, and a steel ring sealing groove 4.7. The top of the suspended actuator receiving cylinder body 4.2 is fixedly connected to the wellhead connecting flange 4.1 through a welded joint 4.9. The bottom of the suspended actuator receiving cylinder body 4.2 is fitted with a bottom plug 4.3. The suspended actuator 6 is installed in the inner cavity of the suspended actuator receiving cylinder body 4.2. A blowout preventer sealing groove 4.6 is provided on the upper side of the wellhead connecting flange 4.1, and a steel ring sealing groove 4.7 is provided on the lower side. Multiple wellhead bolt connection holes 4.4 are provided on the outer side. Multiple blowout preventer assembly connection holes 4.5 are installed on the suspended actuator receiving cylinder body 4.2 for installing connecting bolts 3.

[0033] The bottom plug 4.3 has a circular through hole in its center to facilitate the passage of the continuous oil pipe 7. The bottom plug 4.3 is threaded to the lower end of the cylinder liner body 4.2 of the suspension actuator. The inner diameter of the bottom plug 4.3 is smaller than the inner diameter of the cylinder liner body 4.2 of the suspension actuator. The top of the bottom plug 4.3 has a support step to support the suspension actuator 6. An assembly process hole 4.8 is provided at the bottom end of the bottom plug 4.3.

[0034] Reference Figure 5The ring seal actuator receiving cylinder 2 mentioned in this invention includes a ring seal actuator cylinder body 2.1, an assembly hole 2.2, a ring seal actuator receiving cavity 2.3, a continuous oil pipe passage cavity 2.4, a planar sealing groove 2.5, a ring seal liquid inlet actuation hole 2.6, a suspension liquid inlet actuation hole 2.7, and a suspension actuator upper receiving cavity 2.8. The ring seal actuator cylinder body 2.1 has the ring seal actuator receiving cavity 2.3, the continuous oil pipe passage cavity 2.4, and the suspension actuator upper receiving cavity 2.8 at its center, and the continuous oil pipe passage cavity 2.4 is located in the ring seal actuator receiving cavity. Between cavity 2.3 and upper receiving cavity 2.8 of the suspension actuator, the outer diameter of the continuous oil pipe passing through cavity 2.4 is smaller than the outer diameter of the receiving cavity 2.3 of the ring seal actuator and the receiving cavity 2.8 of the suspension actuator; multiple assembly holes 2.2 are provided axially on the outer wall of the ring seal actuator cylinder 2.1 for installing connecting bolts 3; a ring seal liquid inlet actuation hole 2.6 is provided at the upper part of the outer wall of the ring seal actuator cylinder 2.1, and a suspension liquid inlet actuation hole 2.7 is provided at the lower part; a planar sealing groove 2.5 is provided at the top and bottom of the ring seal actuator cylinder 2.1 respectively.

[0035] Reference Figures 6-7 The ring-sealing actuator 5 mentioned in this invention includes a ring-sealing rubber expansion body 5.1, a ring-sealing power chamber 5.2, and a ring-sealing liquid inlet 5.3. The ring-sealing rubber expansion body 5.1 has a circular through hole in its center to facilitate the passage of the continuous oil pipe 7. The inner cavity of the ring-sealing rubber expansion body 5.1 is provided with a ring-sealing power chamber 5.2, and the outer wall of the ring-sealing rubber expansion body 5.1 is provided with a ring-sealing liquid inlet 5.3, which is connected to the hydraulic device by installing a liquid inlet nozzle and hydraulic pipeline.

[0036] The aforementioned ring-sealing rubber expansion body 5.1 has a sealing contact surface 5.4 at its center for contacting and engaging with the outer wall of the continuous oil pipe 7, and self-sealing structures 5.5 are provided at both ends of the sealing contact surface 5.4. When hydraulic oil is injected, the outer wall of the ring-sealing rubber expansion body 5.1 expands and deforms towards the center under the support of the ring-sealing actuator cylinder 2.1, so that the sealing contact surface 5.4 is in close contact with the outer wall of the continuous oil pipe 7.

[0037] Among them, the rubber expansion body 6.1 is a hollow long cylindrical structure, and the inner wall of the suspension connection wall 6.3 is a reverse toothed structure. Under hydraulic action, the rubber expansion body 6.1 of the suspension actuator 6 contacts and locks against the outer wall of the continuous oil pipe 7, so that the continuous oil pipe 7 is in a static suspension state.

[0038] Furthermore, the sealing contact surface 5.4 of the inner wall of the aforementioned ring-sealing rubber expansion body 5.1 has a structure in which the inner diameter of the center gradually increases to the inner diameter of both ends, and the self-sealing structure 5.5 at both ends of the ring-sealing rubber expansion body 5.1 is a triangular notch structure; under hydraulic action, the ring-sealing rubber expansion body 5.1 of the ring-sealing actuator 5 contacts and locks against the outer wall of the continuous oil pipe 7, thus playing the role of ring sealing.

[0039] Reference Figure 8 The full sealing and shearing device 1 mentioned in this invention is prior art, including a blowout preventer body 1.1, a full sealing device 1.2, a shearing device 1.3, and a locking device 1.4. The existing full sealing device 1.2 and shearing device 1.3 are installed on the upper part of the blowout preventer body 1.1, which can realize the full sealing function and the shearing function respectively. The locking device 1.4 is installed on the top of the blowout preventer body 1.1.

[0040] The method of using the coiled tubing four-gate blowout preventer suspension device mentioned in this invention includes the following steps:

[0041] 1. Assemble the suspension device for the four-gate blowout preventer of coiled tubing. Install the annular seal actuator receiving cylinder 2 below the full sealing and shearing device 1 of the four-gate blowout preventer of coiled tubing. Install the suspension actuator receiving cylinder 4 below the annular seal actuator receiving cylinder 2. Install the annular seal actuator 5 inside the annular seal actuator receiving cylinder 2. Install the suspension actuator 6 inside the suspension actuator receiving cylinder 4. Then, pass the fluid through the annular seal inlet hole 5.3 on the annular seal rubber expansion body 5.1 of the annular seal actuator 5. The hydraulic line passes through the annular seal inlet actuator hole 2.6 and is connected to the hydraulic device. The inlet nozzle installed at the inlet hole 6.4 of the rubber expansion body 6.1 of the suspension actuator 6 is connected to the hydraulic device through the hydraulic line passing through the suspension inlet actuator hole 2.7. Then, the connecting bolt 3 is passed from top to bottom through the full sealing and shearing device 1, the annular seal actuator receiving cylinder 2, and the suspension actuator receiving cylinder 4. Then, the suspension actuator receiving cylinder 4 is installed at the lower part of the wellhead through the wellhead connecting flange 4.1.

[0042] 2. When it is necessary to suspend the continuous oil pipe 7, hydraulic oil is injected into the rubber expansion body 6.1 of the suspension actuator 6 through the hydraulic device. The hydraulic oil enters the power chamber 6.2 inside the rubber expansion body 6.1. Since the outer wall of the rubber expansion body 6.1 is attached to the inner wall of the cylinder liner body 4.2 of the suspension actuator, the hydraulic oil pushes the inner wall of the rubber expansion body 6.1 to be squeezed and deformed inward, thereby pushing the suspension connecting wall 6.3 to lock onto the outer wall of the continuous oil pipe 7, so that the continuous oil pipe 7 is in a static suspension state.

[0043] 3. When it is necessary to perform ring sealing on the coiled tubing 7, hydraulic oil is injected into the ring sealing rubber expansion body 5.1 of the ring sealing actuator 5 through a hydraulic device. The hydraulic oil enters the ring sealing power chamber 5.2 inside the ring sealing rubber expansion body 5.1. Since the outer wall of the ring sealing rubber expansion body 5.1 is attached to the inner wall of the ring sealing actuator cylinder 2.1, the hydraulic oil pushes the inner wall of the ring sealing rubber expansion body 5.1 to be squeezed and deformed inward, thereby pushing the sealing contact surface 5.4 to be pressed tightly against the outer wall of the coiled tubing 7. Since the sealing contact surface 5.4 of the inner wall of the ring sealing rubber expansion body 5.1 has a structure in which the inner diameter of the center gradually increases to the inner diameter of both ends, and the self-sealing structure 5.5 at both ends of the ring sealing rubber expansion body 5.1 is a triangular notch structure; under the action of hydraulic pressure, the ring sealing rubber expansion body 5.1 is locked in contact with the outer wall of the coiled tubing 7, which plays a role in ring sealing and preventing blowout.

[0044] Example 2: The coiled tubing four-gate blowout preventer suspension device mentioned in this invention includes connecting bolts 3, and also includes a ring seal actuator receiving cylinder 2, a suspension actuator receiving cylinder 4, a ring seal actuator 5, and a suspension actuator 6. The ring seal actuator 5 is installed in the inner cavity of the ring seal actuator receiving cylinder 2, the suspension actuator receiving cylinder 4 is installed on the lower side of the ring seal actuator receiving cylinder 2, and the suspension actuator 6 is installed in the inner cavity of the suspension actuator receiving cylinder 4. The full seal and shearing device 1 and the ring seal actuator are connected by multiple connecting bolts 3. The receiving cylinder 2 and the suspension actuator receiving cylinder 4 are connected and fixed; the suspension actuator 6 includes a rubber expansion body 6.1, a power chamber 6.2, a suspension connecting wall 6.3, and a liquid inlet 6.4. The power chamber 6.2 is provided inside the rubber expansion body 6.1, and a liquid inlet 6.4 is provided on the outer wall of the rubber expansion body 6.1. A suspension connecting wall 6.3 for contacting the outer wall of the continuous oil pipe 7 is provided at the center of the rubber expansion body 6.1. The hydraulic device is connected to the liquid inlet nozzle installed at the liquid inlet 6.4 through hydraulic pipelines.

[0045] The difference from Example 1 is:

[0046] The suspension connection wall 6.3 on the inner wall of the rubber expansion body 6.1 mentioned in this embodiment has an anti-slip textured structure. Under hydraulic action, the suspension connection wall 6.3 contacts and locks onto the outer wall of the continuous oil pipe 7, so that the continuous oil pipe 7 is in a static suspension state.

[0047] The above description is merely a partial preferred embodiment of the present invention. Any person skilled in the art can modify the above-described technical solutions or modify them into equivalent technical solutions. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A coiled tubing four-blade preventer hanger device comprising a connecting bolt (3), characterized in that: Also include ring seal executor adapter cylinder (2), hanging executor adapter cylinder (4), ring seal executor (5), hanging executor (6), the inner cavity of the ring seal executor adapter cylinder (2) installs the ring seal executor (5), the lower side of the ring seal executor adapter cylinder (2) installs the hanging executor adapter cylinder (4), the inner cavity of the hanging executor adapter cylinder (4) installs the hanging executor (6), through multiple connecting bolts (3) full seal and shearing device (1), ring seal executor adapter cylinder (2) and hanging executor adapter cylinder (4) are connected and fixed;The hanging executor (6) includes rubber expansion body (6.1), power cavity (6.2), hanging connection wall (6.3), liquid inlet hole (6.4), the power cavity (6.2) is arranged in the rubber expansion body (6.1), the outer wall of the rubber expansion body (6.1) is provided with a liquid inlet hole (6.4), the center of the rubber expansion body (6.1) is provided with a hanging connection wall (6.3) for contacting the outer wall of the coiled tubing (7), and the hydraulic device is connected with the liquid inlet nozzle installed at the liquid inlet hole (6.4) through a hydraulic pipeline; The hanging executor adapter cylinder (4) includes wellhead connection flange (4.1), hanging executor adapter cylinder sleeve body (4.2), bottom plug (4.3), wellhead bolt connection hole (4.4), blowout preventer assembly connection hole (4.5), blowout preventer sealing groove (4.6), steel ring sealing groove (4.7), the top of the hanging executor adapter cylinder sleeve body (4.2) is provided with a wellhead connection flange (4.1), the bottom of the hanging executor adapter cylinder sleeve body (4.2) is provided with a bottom plug (4.3), and the inner cavity of the hanging executor adapter cylinder sleeve body (4.2) is provided with a hanging executor (6); the upper side of the wellhead connection flange (4.1) is provided with a blowout preventer sealing groove (4.6), the lower side is provided with a steel ring sealing groove (4.7), the outer side is provided with a plurality of wellhead bolt connection holes (4.4), and a plurality of blowout preventer assembly connection holes (4.5) are arranged on the hanging executor adapter cylinder sleeve body (4.2) for installing connecting bolts (3).

2. The coiled tubing four ram preventer hanger of claim 1, wherein: The center of the bottom plug (4.3) is provided with a circular through hole, which is convenient for the coiled tubing (7) to pass through;The bottom plug (4.3) is connected at the lower end of the hanging executor adapter cylinder sleeve body (4.2) by screwing, the inner diameter of the bottom plug (4.3) is smaller than the inner diameter of the hanging executor adapter cylinder sleeve body (4.2), and the top end of the bottom plug (4.3) is provided with a support step for supporting the hanging executor (6);An assembly process hole (4.8) is arranged at the bottom end of the bottom plug (4.3).

3. The coiled tubing four ram preventer hanger of claim 2, wherein: The ring seal actuator receiving cylinder (2) comprises a ring seal actuator cylinder body (2.1), an assembly hole (2.2), a ring seal actuator accommodating cavity (2.3), a coiled tubing passing cavity (2.4), a planar sealing groove (2.5), a ring seal liquid inlet execution hole (2.6), a suspension liquid inlet execution hole (2.7) and a suspension actuator upper accommodating cavity (2.8), the center of the ring seal actuator cylinder body (2.1) is provided with the ring seal actuator accommodating cavity (2.3), the coiled tubing passing cavity (2.4) and the suspension actuator upper accommodating cavity (2.8), and the coiled tubing passing cavity (2.4) is located between the ring seal actuator accommodating cavity (2.3) and the suspension actuator upper accommodating cavity (2.8), the outer diameter of the coiled tubing passing cavity (2.4) is smaller than the outer diameters of the ring seal actuator accommodating cavity (2.3) and the suspension actuator upper accommodating cavity (2.8); a plurality of assembly holes (2.2) are axially arranged on the outer wall of the ring seal actuator cylinder body (2.1) for mounting connecting bolts (3); the ring seal liquid inlet execution hole (2.6) is arranged on the upper part of the outer wall of the ring seal actuator cylinder body (2.1), and the suspension liquid inlet execution hole (2.7) is arranged on the lower part; the planar sealing grooves (2.5) are respectively arranged at the top end and the bottom end of the ring seal actuator cylinder body (2.1).

4. The coiled tubing four ram preventer hanger of claim 3, wherein: The ring seal actuator (5) comprises a ring seal rubber expansion body (5.1), a ring seal power cavity (5.2) and a ring seal liquid inlet hole (5.3), the center of the ring seal rubber expansion body (5.1) is provided with a circular through hole, which is convenient for the coiled tubing (7) to pass through; the inner cavity of the ring seal rubber expansion body (5.1) is provided with the ring seal power cavity (5.2), and the outer wall of the ring seal rubber expansion body (5.1) is provided with the ring seal liquid inlet hole (5.3), which is connected to a hydraulic device through the installation of a liquid inlet nozzle and a hydraulic pipeline.

5. The coiled tubing four ram preventer hanger of claim 4, wherein: The center of the ring seal rubber expansion body (5.1) is provided with a sealing contact surface (5.4) for contacting and cooperating with the outer wall of the coiled tubing (7), and self-sealing structures (5.5) are respectively arranged at both ends of the sealing contact surface (5.4); when the hydraulic oil is injected, the outer wall of the ring seal rubber expansion body (5.1) is supported by the ring seal actuator cylinder body (2.1), the ring seal rubber expansion body (5.1) is deformed and expanded towards the center, so that the sealing contact surface (5.4) is in close contact with the outer wall of the coiled tubing (7).

6. The coiled tubing four ram preventer hanger of claim 5, wherein: The rubber expansion body (6.1) is a hollow long cylindrical structure, and the suspension connecting wall (6.3) of the inner wall is a reverse tooth structure; under the action of hydraulic pressure, the rubber expansion body (6.1) of the suspension actuator (6) is locked in contact with the outer wall of the coiled tubing (7), so that the coiled tubing (7) is in a static suspended state.

7. The coiled tubing four ram preventer hanger of claim 6, wherein: The sealing contact surface (5.4) of the inner wall of the ring seal rubber expansion body (5.1) is a structure in which the central inner diameter is gradually larger than the inner diameters at both ends, and the self-sealing structures (5.5) at both ends of the ring seal rubber expansion body (5.1) are triangular notch structures; under the action of hydraulic pressure, the ring seal rubber expansion body (5.1) of the ring seal actuator (5) is locked in contact with the outer wall of the coiled tubing (7), thereby playing a ring sealing role.

8. The method of using a coiled tubing four ram preventer hanger of claim 7, wherein The method comprises the following processes: I. The suspension device of the coiled tubing four-gate blowout preventer is assembled as follows: a ring seal actuator receiving cylinder (2) is installed below the full seal and shearing device (1) of the coiled tubing four-gate blowout preventer; a suspension actuator receiving cylinder (4) is installed below the ring seal actuator receiving cylinder (2); a ring seal actuator (5) is installed in the ring seal actuator receiving cylinder (2); a suspension actuator (6) is installed in the suspension actuator receiving cylinder (4); a liquid inlet nozzle of a ring seal liquid inlet hole (5.3) provided on a ring seal rubber expansion body (5.1) of the ring seal actuator (5) is connected to a hydraulic device through a ring seal liquid inlet execution hole (2.6) by a hydraulic pipeline; a liquid inlet nozzle installed at a liquid inlet hole (6.4) of a rubber expansion body (6.1) of the suspension actuator (6) is connected to the hydraulic device through a suspension liquid inlet execution hole (2.7) by a hydraulic pipeline; then, a connecting bolt (3) is passed through the full seal and shearing device (1), the ring seal actuator receiving cylinder (2) and the suspension actuator receiving cylinder (4) from top to bottom; then, the suspension actuator receiving cylinder (4) is installed at the lower part of the well mouth through a well mouth connecting flange (4.1); II. When the coiled tubing (7) needs to be suspended, hydraulic oil is injected into the rubber expansion body (6.1) of the suspension actuator (6) by the hydraulic device, the hydraulic oil enters a power cavity (6.2) in the rubber expansion body (6.1), because the outer wall of the rubber expansion body (6.1) is attached to the inner wall of the suspension actuator receiving cylinder sleeve body (4.2), the inner wall of the rubber expansion body (6.1) is pushed to deform inward by the hydraulic oil, and then the suspension connecting wall (6.3) is locked to the outer wall of the coiled tubing (7), so that the coiled tubing (7) is in a suspended state; III. When the coiled tubing (7) needs to be ring sealed, hydraulic oil is injected into the ring seal rubber expansion body (5.1) of the ring seal actuator (5) by the hydraulic device, the hydraulic oil enters a ring seal power cavity (5.2) in the ring seal rubber expansion body (5.1), because the outer wall of the ring seal rubber expansion body (5.1) is attached to the inner wall of the ring seal actuator cylinder body (2.1), the inner wall of the ring seal rubber expansion body (5.1) is pushed to deform inward by the hydraulic oil, and then the sealing contact surface (5.4) is attached to the outer wall of the coiled tubing (7), because the sealing contact surface (5.4) of the inner wall of the ring seal rubber expansion body (5.1) is gradually larger in central inner diameter than in both end inner diameters, and the self-sealing structure (5.5) at both ends of the ring seal rubber expansion body (5.1) is a triangular notch structure; under the action of the hydraulic pressure, the ring seal rubber expansion body (5.1) is in contact and locked to the outer wall of the coiled tubing (7), and plays a role of ring sealing and blowout prevention.

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