A new type of continuous circulation valve for oil and gas drilling

Abstract

The utility model provides a novel continuous circulation valve for oil and gas drilling. The novel continuous circulation valve for oil and gas drilling comprises a circulation valve, a vertical rod and a drill rod, flanges one are fixedly sleeved on the upper and lower ends of the circulation valve, a flange two is fixedly sleeved on the vertical rod, a flange three is fixedly sleeved on the drill rod, the two ends of the circulation valve are fixedly connected with the vertical rod and the drill rod through a plurality of bolts, a connecting compensation mechanism is arranged on the circulation valve, the connecting compensation mechanism comprises an upper sleeve ring, the upper sleeve ring is fixedly sleeved on the outer wall of the vertical rod, a lower sleeve ring is fixedly sleeved on the drill rod, four clamping blocks are fixedly connected on the upper sleeve ring and the lower sleeve ring, a rod inlet groove is arranged on the clamping block, an upper cross rod is placed in the rod inlet groove, and an upper connecting rod is fixedly connected on the upper cross rod. The novel continuous circulation valve for oil and gas drilling provided by the utility model can prevent the connecting part from loosening and has the advantages of convenient installation.

Description

Technical Field

[0001] This utility model belongs to the field of circulation valve technology, and in particular relates to a novel continuous circulation valve for oil and gas drilling. Background Technology

[0002] In oil and gas drilling operations, continuous circulation valves are crucial for ensuring stable drilling fluid circulation, maintaining bottom hole pressure balance, and improving drilling efficiency. While existing technologies meet circulation requirements to some extent, connections are prone to loosening in complex vibration environments, affecting circulation stability and operational safety.

[0003] A search revealed an existing patent (authorization announcement number: CN216110605U) disclosing a continuous circulation valve for oilfield development, including a connector with a sealing plate fixedly connected to one side, and a threaded bolt on one side of the sealing plate. The advantages of this invention are: when the water flow is small, the water flow thrust is less than the spring force, and the water will flow out from the bypass pipe. When the water flow is large, the water flow thrust is greater than the spring force, and the main valve will move upward. Simultaneously, this movement generates a pulling force on the bypass valve. Since force can change the motion state of an object, the bypass valve will have a tendency to move. When this tendency is greater than the static friction between the bypass valve and the sliding groove, the bypass valve can move upward, thereby closing the bypass valve and allowing the water to flow out from the main pipe. This device innovatively transforms the original linkage rod that drives the bypass valve switch into an integrated drive and switch component, greatly reducing the probability of malfunctions.

[0004] However, there are still shortcomings in the above structure. The device does not have an anti-loosening mechanism designed for the complex vibration environment during the drilling process. During long-term use, the bolts are prone to loosening due to vibration, which may lead to sealing failure or structural displacement at the connection points and affect the stability of the circulation system.

[0005] Therefore, it is necessary to provide a new type of continuous circulation valve for oil and gas drilling to solve the above-mentioned technical problems. Utility Model Content

[0006] The technical problem solved by this utility model is to provide a new type of continuous circulation valve for oil and gas drilling that can prevent loosening of connection parts and is easy to install.

[0007] To solve the above-mentioned technical problems, the present invention provides a novel continuous circulation valve for oil and gas drilling, comprising: a circulation valve, a vertical rod, and a drill pipe. Both ends of the circulation valve are fixedly fitted with flange 1, flange 2 is fixedly fitted on the vertical rod, and flange 3 is fixedly fitted on the drill pipe. Both ends of the circulation valve are fixedly connected to the vertical rod and the drill pipe respectively by multiple bolts. The circulation valve is provided with a connection compensation mechanism.

[0008] The connection compensation mechanism includes an upper collar, which is fixedly sleeved on the outer wall of the upright. A lower collar is fixedly sleeved on the drill rod. Four locking blocks are fixedly connected to both the upper and lower collars. Each locking block has a rod inlet groove. An upper crossbar is placed in the rod inlet groove. An upper connecting rod is fixedly connected to the upper crossbar. A spring is fixedly connected to the bottom surface of the upper connecting rod. A lower connecting rod is fixedly connected to the bottom end of the spring. A lower crossbar is fixedly connected to the bottom end of the lower connecting rod.

[0009] As a further embodiment of this utility model, the card block is provided with a movable groove that matches the upper crossbar, and the size of the rod inlet groove matches the diameter of the upper connecting rod.

[0010] As a further embodiment of this utility model, four U-shaped grooves are provided on flange one, flange two and flange three, and the position of the locking block corresponds to the position of the U-shaped groove.

[0011] As a further embodiment of this utility model, the outer surface of the spring is coated with a zinc-chromium coating, and a rubber protective sleeve is fitted on the spring.

[0012] As a further embodiment of this utility model, the four locking blocks are evenly distributed along the circumferential direction on the upper and lower collars, and the central angle between adjacent locking blocks is 90°.

[0013] As a further embodiment of this utility model, the bolts connecting the circulation valve to the upright and the circulation valve to the drill pipe are all made of high-strength carbon steel, and there are four bolts in each bolt, which are evenly distributed along the circumference of flange one.

[0014] Compared with related technologies, the novel continuous circulation valve for oil and gas drilling provided by this utility model has the following beneficial effects:

[0015] 1. This utility model, by setting up a connection compensation mechanism composed of an upper collar, a lower collar, a locking block, a crossbar, a connecting rod and a spring, uses the elastic tension of the spring to continuously apply pre-tightening force to the connection part, which can effectively counteract the tendency of bolts to loosen caused by drilling vibration, solve the problem of easy loosening of traditional bolt connections in vibration environment, and significantly improve the stability and reliability of the connection between the continuous circulation valve and the upright and drill pipe.

[0016] 2. This utility model, through the opening of the flange U-shaped groove, the uniform distribution of the clamping blocks, and the protective treatment of the spring, enables the upper and lower crossbars to be installed quickly, improves the on-site installation efficiency, extends the service life of the spring, and enables the device to work stably for a long time in complex drilling environments. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 A schematic diagram of the overall structure of the novel continuous circulation valve for oil and gas drilling provided by this utility model;

[0019] Figure 2 A schematic diagram of the flange connection structure of the novel continuous circulation valve for oil and gas drilling provided by this utility model;

[0020] Figure 3 A schematic diagram of the connection compensation mechanism of the novel continuous circulation valve for oil and gas drilling provided by this utility model;

[0021] Figure 4 A schematic diagram of the locking block and crossbar cooperation structure of the novel continuous circulation valve for oil and gas drilling provided by this utility model.

[0022] In the diagram: 1. Circulation valve; 2. Vertical rod; 3. Drill rod; 4. Flange 1; 5. Flange 2; 6. Flange 3; 7. Upper collar; 8. Lower collar; 9. Clamping block; 10. Rod inlet groove; 11. Upper crossbar; 12. Upper connecting rod; 13. Spring; 14. Lower connecting rod; 15. Lower crossbar; 16. Movable groove; 17. U-shaped groove. Detailed Implementation

[0023] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 This is a schematic diagram of the overall structure of the novel continuous circulation valve for oil and gas drilling according to this utility model; Figure 2 This is a schematic diagram of the flange connection structure of the novel continuous circulation valve for oil and gas drilling according to this utility model; Figure 3 This is a schematic diagram of the connection compensation mechanism of the novel continuous circulation valve for oil and gas drilling according to this utility model; Figure 4 This utility model provides a schematic diagram of the locking block and crossbar cooperation structure of a novel continuous circulation valve for oil and gas drilling. The novel continuous circulation valve for oil and gas drilling includes: a circulation valve 1, a vertical rod 2, and a drill pipe 3. Flange 4 is fixedly sleeved at both the upper and lower ends of the circulation valve 1. Flange 5 is fixedly sleeved on the vertical rod 2, and flange 6 is fixedly sleeved on the drill pipe 3. Both ends of the circulation valve 1 are fixedly connected to the vertical rod 2 and the drill pipe 3 respectively by multiple bolts. The circulation valve 1 is equipped with a connection compensation mechanism.

[0024] The connection compensation mechanism includes an upper collar 7, which is fixedly sleeved on the outer wall of the upright 2. A lower collar 8 is fixedly sleeved on the drill rod 3. Four locking blocks 9 are fixedly connected to both the upper collar 7 and the lower collar 8. Each locking block 9 has a rod inlet groove 10. An upper crossbar 11 is placed in the rod inlet groove 10. An upper connecting rod 12 is fixedly connected to the upper crossbar 11. A spring 13 is fixedly connected to the bottom surface of the upper connecting rod 12. A lower connecting rod 14 is fixedly connected to the bottom end of the spring 13. A lower crossbar 15 is fixedly connected to the bottom end of the lower connecting rod 14.

[0025] like Figure 4 As shown, the card block 9 has an movable groove 16 that matches the upper crossbar 11, and the size of the rod inlet groove 10 matches the diameter of the upper connecting rod 12.

[0026] This design allows the upper crossbar 11 to rotate flexibly within the movable slot 16 and the upper connecting rod 12 to be stably embedded in the rod slot 10, achieving precise assembly of the connection compensation mechanism and the locking block 9, and avoiding jamming or loosening.

[0027] like Figure 2 As shown, four U-shaped grooves 17 are provided on flange 1 4, flange 2 5 and flange 3 6, and the position of the locking block 9 corresponds to the position of the U-shaped grooves 17.

[0028] The four U-shaped grooves 17 enable the upper crossbar 11 and lower crossbar 15 to be installed quickly, improving on-site installation efficiency.

[0029] like Figure 4 As shown, the outer surface of the spring 13 is coated with a zinc-chromium coating, and a rubber protective sleeve is fitted on the spring 13.

[0030] The zinc-chromium coating effectively improves the corrosion resistance of spring 13, resisting the erosion of drilling fluid and other media in the drilling environment; the rubber protective sleeve can buffer the frictional impact of spring 13 during extension and contraction, extending the service life of spring 13.

[0031] like Figure 3 As shown, the four locking blocks 9 are evenly distributed along the circumference on the upper collar 7 and the lower collar 8, and the central angle between adjacent locking blocks 9 is 90°.

[0032] The uniform distribution design of the card block 9 makes the four stress points of the connecting compensation mechanism symmetrically distributed, which can evenly distribute the stress generated by drilling vibration to the upright rod 2 and drill rod 3, thereby improving the vibration resistance stability of the overall structure.

[0033] like Figure 2As shown, the bolts connecting the circulation valve 1 to the upright rod 2 and the circulation valve 1 to the drill rod 3 are all made of high-strength carbon steel, and there are four bolts in each bolt, which are evenly distributed along the circumference of the flange 4.

[0034] The use of high-strength carbon steel bolts ensures the load-bearing capacity of the flange connection.

[0035] The working principle of the novel continuous circulation valve for oil and gas drilling provided by this utility model is as follows:

[0036] First step: When using, first align the flange 1 4 at the top and bottom of the circulation valve 1 with the flange 2 5 on the upright 2 and the flange 3 6 on the drill rod 3 respectively. Insert bolts through the U-shaped groove 17 on the flange and tighten them to form a preliminary fixed connection between the circulation valve 1, the upright 2, and the drill rod 3, ensuring the stability of the basic connection.

[0037] The second step: Next, install the connection compensation mechanism. Fix the upper collar 7 to the outer wall of the upright 2 and the lower collar 8 to the outer wall of the drill pipe 3, so that the locking blocks 9 on the upper collar 7 and the lower collar 8 correspond to the positions of the U-shaped grooves 17 on the flange. Then, insert the upper crossbar 11 into the movable groove 16 and the rod inlet groove 10 of the locking block 9 on the upper collar 7, and insert the lower crossbar 15 into the corresponding groove of the locking block 9 on the lower collar 8. At this time, the spring 13 is in a stretched state. The spring 13 compensates for the connection stability between the circulation valve 1 and the upright 2 and the drill pipe 3, so that the device has a stronger anti-loosening ability in the drilling vibration environment. It can continuously apply pre-tightening force to the connection part through the elastic tension of the spring to counteract the tendency of bolt loosening caused by vibration.

[0038] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0039] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A novel continuous circulation valve for oil and gas drilling, characterized in that, include: The circulating valve, the upright, and the drill rod are provided. The upper and lower ends of the circulating valve are fixedly fitted with flange 1, the upright is fixedly fitted with flange 2, and the drill rod is fixedly fitted with flange 3. The two ends of the circulating valve are fixedly connected to the upright and the drill rod respectively by multiple bolts. The circulating valve is provided with a connection compensation mechanism. The connection compensation mechanism includes an upper collar, which is fixedly sleeved on the outer wall of the upright. A lower collar is fixedly sleeved on the drill rod. Four locking blocks are fixedly connected to both the upper and lower collars. Each locking block has a rod inlet groove. An upper crossbar is placed in the rod inlet groove. An upper connecting rod is fixedly connected to the upper crossbar. A spring is fixedly connected to the bottom surface of the upper connecting rod. A lower connecting rod is fixedly connected to the bottom end of the spring. A lower crossbar is fixedly connected to the bottom end of the lower connecting rod.

2. The novel continuous circulation valve for oil and gas drilling according to claim 1, characterized in that: The card block has a movable groove that matches the upper crossbar, and the size of the rod inlet groove matches the diameter of the upper connecting rod.

3. The novel continuous circulation valve for oil and gas drilling according to claim 1, characterized in that: Four U-shaped grooves are provided on each of the flanges 1, 2, and 3, and the position of the locking block corresponds to the position of the U-shaped groove.

4. The novel continuous circulation valve for oil and gas drilling according to claim 1, characterized in that: The outer surface of the spring is coated with a zinc-chromium coating, and a rubber protective sleeve is fitted on the spring.

5. The novel continuous circulation valve for oil and gas drilling according to claim 1, characterized in that: The four locking blocks are evenly distributed along the circumference on the upper and lower collars, and the central angle between adjacent locking blocks is 90°.

6. The novel continuous circulation valve for oil and gas drilling according to claim 1, characterized in that: The bolts connecting the circulation valve to the upright and the circulation valve to the drill pipe are all made of high-strength carbon steel, and there are four bolts in each bolt, which are evenly distributed along the circumference of flange one.

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