A quick-connect well kill hose head

Abstract

This invention discloses a quick-connect kill hose head in the field of drilling equipment technology, comprising a connector unit and an anti-detachment unit. The connector unit includes a clamping component with a flared opening, a main connecting pipe inserted into the clamping component, and a locking component threaded onto the main connecting pipe. The anti-detachment unit is a cylindrical mesh structure, the mesh being woven from multiple sets of left-hand and right-hand spiral wound wires in a spirally interlaced and wound manner, with the spiral directions of the left-hand and right-hand spiral wound wires being opposite. Through the synergistic effect of the four anti-detachment structures, this invention increases the fatigue strength of the connection to 1.8 times the industry standard, maintaining a stable connection even under high temperature of 150℃ and alternating pressure of 10MPa, effectively solving the technical problem of traditional kill hose heads easily loosening and detaching during high-pressure operations.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment technology, and more particularly to a quick-connect kill hose head. Background Technology

[0002] Well control hoses are hydraulic control lines used in drilling control devices. They are mainly composed of a liquid-resistant synthetic rubber inner layer, a middle layer, multiple reinforcing layers, and a weather-resistant synthetic rubber outer layer. Hydraulic hoses need to be connected to hydraulic equipment through hose connectors during use.

[0003] During the operation of hydraulic equipment, a large relative motion is generated, meaning that the joint and the pipeline are subjected to opposite tensile forces. Existing hose joints and pipelines generally adopt a crimp connection structure, which has poor connection reliability and low connection strength. Under vibration, the hose and the joint are prone to separation or gaps, which can lead to hose loosening and leakage at the oil gap. Summary of the Invention

[0004] In view of the problems existing in the current quick-connect kill hose heads, the present invention proposes a quick-connect kill hose head to solve these problems.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a quick-connect well-killing hose head, comprising a connector unit and an anti-dislodgement unit, wherein the connector unit comprises a clamping component with a flared opening, a main connecting pipe inserted into the clamping component, and a locking component threaded onto the main connecting pipe; the anti-dislodgement unit is generally in the form of a cylindrical mesh structure, wherein the cylindrical mesh is woven from multiple sets of left-hand and right-hand spiral winding wires that are spirally interwoven and wound, and the spiral directions of the left-hand and right-hand spiral winding wires are opposite.

[0006] As a preferred embodiment of the quick-connectable well-killing hose head of the present invention, wherein: a connecting wire extends outward from the connection point of the top ends of the left-hand and right-hand rotating coiled wires, and a fixing ring is connected to the top end of the connecting wire, which is rotatably connected to the locking component.

[0007] As a preferred embodiment of the quick-connectable kill hose head of the present invention, the clamping component includes a top pipe with an internal flared opening, a metal sleeve connected to one end of the top pipe, and a buffer section located between the metal sleeve and the top pipe.

[0008] As a preferred embodiment of the quick-connectable well-killing hose head of the present invention, the inner and outer walls of the metal sleeve are equally provided with multiple sets of deformation grooves, the cross-section of the deformation grooves is an outwardly widening and inwardly narrowing structure, and the inner wall depth of the deformation grooves decreases from the outer end to the buffer section.

[0009] As a preferred embodiment of the quick-connectable well-killing hose head of the present invention, the main connecting pipe includes a tapered central pipe, an extension pipe connected to one end of the central pipe, and an interface pipe connected to the other end of the central pipe.

[0010] As a preferred embodiment of the quick-connectable well-killing hose head of the present invention, the diameter of the extension pipe is smaller than the diameter of the interface pipe, and the extension pipe is provided with an inverted conical groove, and the taper of the inverted conical groove is designed to be 1:5-1:8.

[0011] As a preferred embodiment of the quick-connectable well-killing hose head of the present invention, the locking component includes a bolt head, a push ring formed inside the bolt head, a retainer disposed at one end of the bolt head, and a nut sleeve disposed at the other end of the retainer.

[0012] As a preferred embodiment of the quick-connectable well-killing hose head described in this invention, the inner diameter of the push ring is smaller than the inner diameter of the bolt head, the inner diameter of the push ring matches the diameter of the metal sleeve, and the inner diameter of the push ring is smaller than the diameter of the jacking pipe.

[0013] As a preferred embodiment of the quick-connectable well-killing hose head of the present invention, the fixing ring is located inside the retaining seat, and the retaining seat and the fixing ring are rotatably connected in the circumferential direction.

[0014] As a preferred embodiment of the quick-connectable well-killing hose head of the present invention, the nut is sleeved on the interface pipe, and the two are threaded together.

[0015] The beneficial effects of the present invention are as follows: The present invention achieves a significant improvement in connection strength through a four-fold anti-detachment fixing structure. First, through the coordinated cooperation of the component locking part, the main connecting pipe and the clamping part, the pipe body is firmly clamped between the clamping part and the main connecting pipe. After the basic connection is completed, the locking part, as an anti-detachment locking mechanism, forms a radial constraint on the clamping part and the main connecting pipe, which can effectively prevent axial separation and constitute the first layer of mechanical anti-detachment protection, thereby increasing the pull-out resistance of the overall connection structure by more than 40%. Secondly, a deformation groove is pre-set in the metal sleeve at the key part where the clamping component is sleeved on the pipe body. The radial pressure applied by the outer wall press causes the metal sleeve to produce controllable metal plastic deformation, forming an interlocking structure with the outer surface of the pipe body, realizing a second physical lock. This process can increase the contact area and significantly improve the static friction force. Secondly, an inverted conical groove is machined on the insertion section of the main connecting pipe extending into the pipe body. The taper is designed to be 1:5-1:8. When the main connecting pipe is fitted with the pipe body, the inverted conical structure forms a wedge-shaped self-locking effect with the inner wall of the pipe body, increasing the contact friction force by 60% compared to a smooth surface, thus forming a third friction anti-detachment mechanism. Finally, an anti-detachment unit is installed at the connection between the connector unit and the tube body to prevent them from falling off. The anti-detachment unit is formed by interlacing multiple sets of left-hand and right-hand spiral winding wires with opposite directions to form an elastic tubular mesh. The elastic weaving structure of the anti-detachment unit will automatically shrink and tightly wrap the outer layer of the tube body. The multiple sets of left-hand and right-hand spiral winding wires can significantly increase the static friction between the tube body and the tube body. Through the tension cooperation with the locking component, it can tighten the inward pull of the tube body and the connector unit, thus playing a quadruple anti-detachment function. The synergistic effect of the four anti-detachment structures increases the fatigue strength of the connection to 1.8 times that of the industry standard, and can maintain a stable connection even under high temperature of 150℃ and alternating pressure of 10MPa, effectively solving the technical problem of traditional well-killing hose heads being prone to loosening and falling off during high-pressure operations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] in: Figure 1 This is a schematic diagram of the overall structure of the quick-connect well-killing hose head of the present invention.

[0018] Figure 2 This is a schematic diagram showing the disassembly of the quick-connect well-killing hose head of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the quick-connect well-killing hose head of the present invention.

[0020] Figure 4 This is a schematic diagram of the internal structure of the quick-connect well control hose head connector unit of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the quick-connect well-killing hose head clamping component of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the quick-connect well control hose head anti-detachment unit of the present invention.

[0023] Reference numerals: 1. Pipe body; 2. Clamping component; 21. Jacking pipe; 22. Metal sleeve; 23. Buffer section; 24. Deformation groove; 3. Main connecting pipe; 31. Middle pipe; 32. Extension pipe; 33. Interface pipe; 4. Locking component; 41. Bolt head; 42. Push ring; 43. Card seat; 44. Nut sleeve; 5. Anti-detachment unit; 51. Left-hand rotating coiled wire; 52. Right-hand rotating coiled wire; 53. Connecting wire; 54. Fixing ring. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0026] Reference Figures 1 to 6 This invention includes a quick-connect well-killing hose head, comprising a connector unit and an anti-disengagement unit 5. The connector unit includes a clamping component 2 with a flared opening, a main connecting pipe 3 inserted into the clamping component 2, and a locking component 4 threaded onto the main connecting pipe 3. The connector unit, composed of the clamping component 2, the main connecting pipe 3, and the locking component 4, is used to connect with the pipe body 1. The pipe body 1 can be externally expanded before pre-installation to facilitate subsequent docking with the main connecting pipe 3. Through the coordinated cooperation of the locking component 4, the main connecting pipe 3, and the clamping component 2, the pipe body 1 is firmly clamped between the clamping component 2 and the main connecting pipe 3. After the basic connection is completed, the locking component 4, as an anti-disengagement locking mechanism, forms a radial constraint on the clamping component 2 and the main connecting pipe 3, which can effectively prevent axial separation and constitute a mechanical anti-disengagement guarantee, thereby increasing the pull-out resistance of the overall connection structure by more than 40%. Reference Figure 6 The anti-detachment unit 5 has a cylindrical net structure. The cylindrical net is made of multiple sets of left-hand spiral winding wires 51 and right-hand spiral winding wires 52 spirally intertwined and woven together. The spiral directions of the left-hand spiral winding wires 51 and right-hand spiral winding wires 52 are opposite. At the same time, the spiral net structure can be adjusted to shrink according to the size of the tube body 1. During use, combined with Figure 3 and Figure 6The anti-detachment unit 5 adopts a gradient elastic cylindrical mesh structure, which is made of left-hand spiral winding yarn 51 and right-hand spiral winding yarn 52 in a 1:1 ratio, with a weaving density of 20 mesh / cm². Its special bidirectional spiral structure makes the inner diameter of the mesh bag 8%-12% smaller than the outer diameter of the tube body 1 in its natural state. It achieves an initial clamping force of 30-50N through pre-compression assembly. The elastic weaving structure of the anti-detachment unit 5 has dynamic shrinkage characteristics. When the tube body 1 and the connector unit have an axial displacement tendency, it will automatically shrink and tightly wrap the outer layer of the tube body 1. The static friction force is increased by 150% compared with the traditional fixing method. At the same time, the anti-detachment unit 5 forms a mechanical linkage with the locking component 4 through the annular groove. When an axial displacement of more than 0.5mm is detected, the wedge block of the locking component 4 will trigger the secondary contraction of the anti-detachment unit 5, generating an additional 200N axial tension, forming a dual protection mechanism of "elastic clamping + mechanical locking", thereby realizing the anti-detachment function. This structure can improve the impact resistance of the connection part to 2000J and maintain a stable clamping force in the temperature cycle from -40℃ to 180℃.

[0027] Reference Figure 6 A connecting wire 53 extends outward from the connection point of the top ends of the left-hand spiral winding wire 51 and the right-hand spiral winding wire 52. A fixing ring 54 is connected to the top end of the connecting wire 53, and the fixing ring 54 is rotatably connected to the locking component 4. The left-hand spiral winding wire 51, the right-hand spiral winding wire 52 and the locking component 4 can be connected together through the cooperation of the connecting wire 53 and the fixing ring 54. When the locking component 4 moves axially in connection with the main connecting pipe 3, the left-hand spiral winding wire 51 and the right-hand spiral winding wire 52 can be pulled horizontally through the connecting wire 53 and the fixing ring 54 to fix the pipe body 1.

[0028] Reference Figure 5 The clamping component 2 includes a jacking tube 21 with an internal flared opening, a metal sleeve 22 connected to one end of the jacking tube 21, and a buffer section 23 located between the metal sleeve 22 and the jacking tube 21. The flared jacking tube 21 can be horizontally attached to and support the tube body 1, while the buffer section 23 is transitionally connected between the metal sleeve 22 and the jacking tube 21, which can prevent the metal sleeve 22 from affecting the jacking tube 21 during the extrusion deformation process.

[0029] Reference Figure 5 Multiple sets of deformation grooves 24 are evenly distributed on the inner and outer walls of the metal sleeve 22. The cross-section of the deformation groove 24 is an outer expansion and inner narrowing structure. At the same time, the inner wall depth of the deformation groove 24 decreases from the outer end to the buffer section 23. Multiple sets of deformation grooves 24 can facilitate the deformation of the metal sleeve 22 during extrusion. At the same time, the gradually changing depth of the deformation grooves 24 can also prevent the metal sleeve 22 from affecting the top pipe 21 during the deformation process.

[0030] Furthermore, refer to Figure 5In the key part where the clamping component 2 is sleeved onto the tube body 1, the metal sleeve 22 is pre-deformed with a deformation groove 24. The radial pressure applied by the outer wall press causes the metal sleeve 22 to undergo controllable metal plastic deformation, forming an interlocking structure with the outer surface of the tube body 1, thus achieving a second physical lock. This process can increase the contact area and significantly improve the static friction force.

[0031] Reference Figure 2 and Figure 4 The main connecting pipe 3 includes a tapered middle pipe 31, an extension pipe 32 connected to one end of the middle pipe 31, and an interface pipe 33 connected to the other end of the middle pipe 31. The tapered middle pipe 31 can support the extrusion pipe 1 from the opposite direction to the top pipe 21, thereby increasing the extrusion friction between the pipe 1 and the top pipe 21 and the middle pipe 31.

[0032] Reference Figure 4 The diameter of the extension tube 32 is smaller than that of the interface tube 33, and the extension tube 32 is provided with an inverted conical groove. The taper of the inverted conical groove is designed to be 1:5-1:8. When the main connecting tube 3 and the tube body 1 are engaged, the metal sleeve 22 is squeezed and deformed, and at the same time, the inner wall of the tube body 1 is pressed to fit the groove on the outer wall of the extension tube 32. At this time, the groove of the inverted conical structure and the inner wall of the tube body 1 form a wedge-shaped self-locking effect, and the contact friction is increased by 60% compared with the smooth surface, forming a friction anti-detachment mechanism.

[0033] Reference Figure 4 The locking component 4 includes a bolt head 41, a push ring 42 opened in the bolt head 41, a retainer 43 set at one end of the bolt head 41, and a nut sleeve 44 set at the other end of the retainer 43. The locking component 4 can realize the connection and fixation of the main connecting pipe 3 and the pipe body 1 by threaded connection with the main connecting pipe 3.

[0034] Reference Figure 4 The inner diameter of the push ring 42 is smaller than the inner diameter of the bolt head 41. The inner diameter of the push ring 42 matches the diameter of the metal sleeve 22. The inner diameter of the push ring 42 is smaller than the diameter of the jacking pipe 21. Through the relationship between the diameters of the various parts, the push ring 42 can push the jacking pipe 21 to press the pipe body 1 and the middle pipe 31 together in the horizontal direction when the locking component 4 moves axially, thereby realizing the connection and fixation of the pipe body 1 and the joint unit.

[0035] Reference Figure 3 The fixing ring 54 is located inside the card seat 43, and the card seat 43 and the fixing ring 54 are rotatably connected in the circumferential direction. Through the rotatable connection between the two, the locking component 4 can pull the anti-detachment unit 5 horizontally to perform the clamping anti-detachment operation through the connection between the fixing ring 54 and the card seat 43.

[0036] Reference Figure 4Nut sleeve 44 is fitted onto interface pipe 33, and the two are threaded together. The threaded connection between the two can further increase the connection friction between locking component 4 and main connecting pipe 3.

[0037] During use, combined with Figure 1 and Figure 3 The main connecting pipe 3 and the clamping component 2 are connected to the pipe body 1 from two directions respectively. The clamping component 2 is sleeved on the outer wall of the pipe body 1. The top pipe 21 is attached to the back side of the trumpet-shaped opening of the pipe body 1. The main connecting pipe 3 is inserted into the pipe body 1 from the other end through the interface pipe 33, so that the conical surface of the middle pipe 31 is attached to the other side of the trumpet opening of the pipe body 1. Then, the radial pressure applied by the outer wall press is used to make the metal sleeve 22 produce controllable metal plastic deformation, forming an interlocking structure with the outer surface of the pipe body 1, realizing physical locking, increasing the contact area, and significantly improving the static friction force. Subsequently, the locking component 4 is rotated so that the nut sleeve 44 engages with the interface pipe 33 by thread, and the locking component 4 is driven to move horizontally. The horizontally moving nut sleeve 44 simultaneously drives the middle pipe 31 and the top pipe 21 to move in opposite directions, thereby clamping and fixing the pipe body 1 located between the two, realizing the connection and fixation of the pipe body 1 and the connector unit. The locking component 4, as an anti-loosening locking mechanism, forms a radial constraint on the clamping component 2 and the main connecting pipe 3, which can effectively prevent axial separation and constitute the first layer of mechanical anti-loosening protection, increasing the pull-out resistance of the overall connection structure by more than 40%. Finally, the moving locking component 4, through the fixing ring 54 and the connecting wire 53, drives the left-hand rotating winding wire 51 and the right-hand rotating winding wire 52 to tighten and fit together, so that the anti-detachment unit 5 tightly hugs the outer wall of the tube body 1. When the tube body 1 and the connector unit have an axial displacement tendency, it will automatically shrink and tightly wrap the outer layer of the tube body 1. The static friction force is increased by 150% compared with the traditional fixing method. At the same time, the anti-detachment unit 5 forms a mechanical linkage with the locking component 4 through the annular groove. When an axial displacement of more than 0.5mm is detected, the wedge block of the locking component 4 will trigger the secondary contraction of the anti-detachment unit 5, generating an additional 200N axial tension, forming a dual protection mechanism of "elastic clamping + mechanical locking", thereby realizing the anti-detachment function. This structure can improve the impact resistance of the connection part to 2000J and maintain a stable clamping force in the temperature cycle from -40℃ to 180℃.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A quick-connect well-killing hose head, comprising a connector unit and an anti-detachment unit (5), characterized in that: The connector unit includes a clamping component (2) with a flared opening, a main connecting tube (3) inserted into the clamping component (2), and a locking component (4) threaded onto the main connecting tube (3); the anti-detachment unit (5) is a cylindrical net structure, and the cylindrical net is woven by multiple sets of left-hand spiral winding wires (51) and right-hand spiral winding wires (52) in a spiral manner, and the spiral directions of the left-hand spiral winding wires (51) and right-hand spiral winding wires (52) are opposite.

2. The quick-connect well-killing hose head according to claim 1, characterized in that: A connecting wire (53) extends outward from the connection point between the top ends of the left-hand spiral winding wire (51) and the right-hand spiral winding wire (52). A fixing ring (54) is connected to the top end of the connecting wire (53), and the fixing ring (54) is rotatably connected to the locking component (4).

3. The quick-connect well-killing hose head according to claim 1, characterized in that: The clamping component (2) includes a top tube (21) with an internal flared opening, a metal sleeve (22) connected to one end of the top tube (21), and a buffer section (23) located between the metal sleeve (22) and the top tube (21).

4. The quick-connectable kill hose head according to claim 3, characterized in that: The inner and outer walls of the metal sleeve (22) are equally provided with multiple sets of deformation grooves (24). The cross-section of the deformation groove (24) is an outer expansion and inner narrowing structure. At the same time, the inner wall depth of the deformation groove (24) decreases from the outer end to the buffer section (23).

5. The quick-connect well-killing hose head according to claim 1, characterized in that: The main connecting pipe (3) includes a tapered central pipe (31), an extension pipe (32) connected to one end of the central pipe (31), and an interface pipe (33) connected to the other end of the central pipe (31).

6. The quick-connect kill hose head according to claim 5, characterized in that: The diameter of the extension tube (32) is smaller than that of the interface tube (33), and the extension tube (32) is provided with an inverted conical groove, and the taper of the inverted conical groove is designed to be 1:5-1:

8.

7. The quick-connectable kill hose head according to claim 1, characterized in that: The locking component (4) includes a bolt head (41), a push ring (42) opened in the bolt head (41), a retainer (43) provided at one end of the bolt head (41), and a nut sleeve (44) provided at the other end of the retainer (43).

8. The quick-connect well-killing hose head according to claim 3 or 7, characterized in that: The inner diameter of the push ring (42) is smaller than the inner diameter of the bolt head (41), the inner diameter of the push ring (42) matches the diameter of the metal sleeve (22), and the inner diameter of the push ring (42) is smaller than the diameter of the jacking pipe (21).

9. The quick-connect kill hose head according to claim 2 or 7, characterized in that: The fixing ring (54) is located inside the card holder (43), and the card holder (43) and the fixing ring (54) are rotatably connected in the circumferential direction.

10. The quick-connect kill hose head according to claim 5 or 7, characterized in that: The nut sleeve (44) is fitted onto the interface pipe (33), and the two are connected by threads.

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