A rotary disconnector disengaging device

Abstract

A rotary disconnector disengagement device comprises an upper rotating head and a lower rotating head, both of which are sleeved onto a central rod. A groove at the end of the upper rotating head engages a boss at the end of the release head, securing the upper rotating head in place. A spring is provided between the upper and lower rotating heads to provide the elastic force for disengagement. This device, which generates a rotational torque to disengage the disconnector by simply lifting the sucker rod, does not require rotating the pump rod, achieving the same disengagement function as a conventional claw-type disconnector and is simple and reliable to operate.

Description

Technical Field

[0001] The present invention belongs to the technical field of disconnectors, and in particular relates to a disengaging device for a rotary disconnector. Background Art

[0002] The coupling is an indispensable tool in oilfield production. It connects the pump plunger and sucker rod, playing a crucial role in connecting the upstream and downstream of production operations. While the couplings currently used in production sites are generally quite effective, as production requirements continue to increase, coupling usage is also increasing. Failure of the coupling claws is becoming a significant factor in tool failure. In recent years, the incidence of coupling claw breakage in oilfields has reached approximately 15%. This can lead to well abandonment or production suspension, resulting in direct economic losses. Consequently, a high-strength, clawless rotary coupling has been developed.

[0003] The rotary disconnect requires rotating the sucker rod to disengage, but in reality, the sucker rod is too long (nearly 1,000 meters), which makes it difficult to transmit torque to the disconnect at the bottom of the sucker rod, making it difficult to disengage the disconnect. At the same time, there is a certain rebound torque when rotating the sucker rod at the wellhead, which is dangerous. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a rotary disconnector disengaging device.

[0005] The technical solution adopted by the invention is: a rotary disconnector disengaging device, the technical key points of which are: it includes a short section sleeved on the center rod, a release head connected to the oil pipe sleeved outside the short section, the end of the release head has a boss, the boss cooperates with the groove at the end of the upper rotating head sleeved on the center rod, and the upper rotating head is fixed when the boss and the groove are engaged; the lower rotating head is connected to the center rod, the spring is sleeved on the center rod and installed between the upper rotating head and the lower rotating head, the lower rotating head and the connecting end of the upper rotating head are slidably matched, and the spring is compressed so that the upper rotating head is close to the step on the center rod.

[0006] In the above solution, the connection end between the lower rotating head and the upper rotating head is spiral-shaped.

[0007] The present invention has the following beneficial effects: the rotary disconnector disengagement device comprises an upper rotating head and a lower rotating head, both of which are sleeved onto a central rod. A groove at the end of the upper rotating head engages with a boss at the end of the release head, securing the upper rotating head in place. A spring is provided between the upper and lower rotating heads to provide an elastic force for disengaging the two. This device, which generates a rotational torque to disengage the disconnector by simply lifting the sucker rod, does not require rotating the sucker rod, achieving the same disengagement function as a conventional claw-type disconnector and is simple and reliable to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 This is a structural schematic diagram of a rotary disconnector disengaging device according to an embodiment of the present invention;

[0010] Figure 2 Schematic diagram of the upper rotating head structure in an embodiment of the present invention;

[0011] Figure 3 This is a schematic structural diagram of the lower rotating head in an embodiment of the present invention;

[0012] Figure 4 This is a schematic diagram of the central rod structure in an embodiment of the present invention;

[0013] Figure 5 This is a schematic diagram of the connection of the upper and lower rotary joints in an embodiment of the present invention;

[0014] The serial numbers in the figure are as follows: 1 short section, 2 upper rotating head, 3 release head, 4 center rod, 5 spring, 6 lower rotating head. DETAILED DESCRIPTION

[0015] To make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the following Figure 1 The present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

[0016] The present embodiment adopts a rotary disconnector disengaging device, including a release head 3, the upper part of which is connected to the oil pipe by a thread, and the lower part is connected to the oil pump by a thread. A short section 1 fixedly connected to the center rod 4 by a thread is provided in the release head 3. The center rod 4 is externally sleeved with an upper rotating head 2 and a lower rotating head 6, and one end of the upper rotating head 2 is connected to the upper end of the short section 1 by a thread, and the lower rotating head 6 is fixed to the center rod 4 by a thread. The spring 5 is sleeved on the center rod 4 and assembled between the upper rotating head 2 and the lower rotating head 6. Under normal circumstances, the lower rotating head 6 compresses the spring 5 by a certain distance when assembled with the upper rotating head 2, so that the upper rotating head 2 is close to the step E of the center rod 4. After the assembly is completed, there are parts that are inserted into each other between the upper rotating head 2 and the lower rotating head 6, and the end faces have a certain spatial distance (see Figure 5 ), like this, can play the role of guiding and can also ensure to have certain certain space, ensure that the lower rotating head has effective rotation angle, thereby making the rotary disconnector disengage. In the disengagement process, the elastic force of the spring 5 is used as the disengagement force to make the rotary disconnector disengage.

[0017] The working principle of the rotary disconnector disengaging device in this embodiment is as follows:

[0018] The tool press Figure 1 Connect the parts as shown, and then dock them after going down into the well to complete normal production. When the disconnector needs to be disconnected, lift the sucker rod connected to the upper part of the disconnector so that the upper rotating head 2 reaches the position of the release head 3. Figure 2 The middle of the boss at A is blank), while the release head has a boss (see Figure 4 At D in the middle), the boss and the groove will engage to fix the upper rotating head. At this time, if the sucker rod is continuously lifted, the lower rotating head 6 will move to the left together; because the upper rotating head and the lower rotating head adopt a symmetrical double helical meshing method (see Figure 2 At B in the middle, Figure 3 C in the middle), and the upper rotating head is fixed, the lower rotating head will produce a rotational motion while moving to the left. Since the lower rotating head and the center rod are relatively integrated, the center rod will rotate synchronously, thereby causing the disconnector to rotate and disengage.

[0019] The tool is easy to operate and reliable.

[0020] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A rotary disconnector disengaging device, characterized in that: The invention comprises a short section (1) sleeved on a center rod (4), a release head (3) connected to an oil pipe sleeved on the outside of the short section (1), the end of the release head (3) having a boss (D), the boss (D) engaging with a groove at the end of an upper rotating head (2) sleeved on the center rod (4), and the upper rotating head (2) being fixed when the boss (D) and the groove are engaged; a lower rotating head (6) being connected to the center rod (4), a spring (5) sleeved on the center rod (4) and installed between the upper rotating head (2) and the lower rotating head (6), the lower rotating head (6) slidingly engaging with the connection end of the upper rotating head (2), and the spring being compressed so that the upper rotating head (2) is close to the step on the center rod (4); When the disconnector needs to be disengaged, the sucker rod connected to the upper part of the disconnector is lifted up so that the upper rotating head (2) reaches the position of the release head (3). The groove on the upper rotating head and the boss on the release head engage to fix the upper rotating head. At this time, continuing to lift the sucker rod will cause the lower rotating head (6) to move to the left together. The upper rotating head and the lower rotating head adopt a symmetrical double-helix meshing method. The upper rotating head is fixed and the lower rotating head will generate a rotational motion while moving to the left. The center rod will rotate synchronously, causing the disconnector to rotate and disengage. The connection end between the lower rotating head (6) and the upper rotating head (2) is spiral-shaped.

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