Vibration well cementation float shoe driven by double-acting torque

Abstract

The invention relates to a double-acting torque driven vibration well cementation float shoe which comprises an upper connector and a lower connector. The stator assembly is in threaded connection with the upper joint and is used for changing the flowing direction of the cement fluid in the stator assembly; and the rotating assembly is rotatably connected with the stator assembly and is used for rotating on the basis of changing the flowing direction of the cement fluid to generate axial vibration and radial vibration. The accident rate of well cementation operation under complex working conditions can be reduced, and the well cementation quality is improved; meanwhile, the tool is simple in structure, stable in vibration, convenient to assemble and manufacture, long in service life and high in applicability.

Description

Technical Field

[0001] This invention relates to the field of oil and gas well engineering technology, specifically to a dual-acting torque driven vibratory cementing float. Background Technology

[0002] Cementing operations are a key part of the oil and gas exploration and development process. Cementing efficiency and quality directly affect the operation cycle and safety.

[0003] However, the problem of low cementing quality under complex operating conditions is very prominent, and existing vibratory cementing tools have defects such as complex structure, complex operation procedures, large vibration loss, and high incidence of cementing operation accidents.

[0004] Therefore, there is an urgent need for a dual-torque driven vibratory cementing float to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a dual-torque driven vibratory cementing float shoe, which can reduce the incidence of cementing operation accidents under complex working conditions and improve cementing quality. At the same time, this tool has a simple structure, stable vibration, is easy to assemble and manufacture, has a long service life, and is highly applicable.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The dual-torque driven vibratory cementing float of the present invention includes: an upper connector; a stator assembly threadedly connected to the upper connector for changing the flow direction of cement fluid inside it; and a rotating assembly rotatably connected to the stator assembly for rotating based on the changed flow direction of cement fluid to generate axial and radial vibrations.

[0008] The dual-torque driven vibratory cementing float, preferably, includes a stator assembly comprising: The stator cylinder has its first end threadedly connected to the tail end of the upper connector, and a first rupture disc is provided in its middle. Several first through holes are provided on the cylinder wall of the stator cylinder located upstream of the first rupture disc, and several first oblique holes are provided on the cylinder wall of the stator cylinder located downstream of the first rupture disc. The first stator, and several first stators are respectively sleeved on the outside of the stator cylinder, and each first stator is correspondingly set and connected to a first through hole.

[0009] Preferably, the stator assembly of the dual-torque driven vibratory cementing float further includes a stator bearing housing and a second stator; The stator cylinder located downstream of the first inclined hole has a plurality of second through holes on its cylinder wall, and a plurality of second stators are respectively sleeved on the outside of the stator cylinder, and each second stator is correspondingly provided with and connected to a second through hole; The first end of the stator bearing housing is threadedly connected to the second end of the stator cylinder; A second rupture disc is provided inside the stator bearing housing, and the second rupture disc blocks the second end opening of the stator cylinder; Several second oblique holes are provided on the outer wall of the stator bearing housing located downstream of the second rupture disc; A circular opening is provided on one side of the end face of the second end of the stator bearing housing, and a fan-shaped opening is provided on the other side of the end face; a third rupture disc is provided inside the circular opening.

[0010] Preferably, in the dual-torque driven vibratory cementing float, the stator assembly further includes a pressure ring and a stator spacer ring. The pressure ring is disposed upstream of a plurality of first stators forming an integral structure and is used to limit the first stators. The stator spacer ring is disposed upstream of a plurality of second stators forming an integral structure and is used to limit the second stators.

[0011] The dual-torque driven vibratory cementing float shoe, preferably, includes a first stator or a second stator comprising: a stator body with an annular structure, wherein a plurality of oblique holes are provided on the outer annular surface of the stator body.

[0012] The dual-torque driven vibratory cementing float, preferably, includes a rotating assembly comprising: A hanging block is sleeved on the upper connector. A first thrust ball bearing is provided between the first end of the hanging block and the upper connector, and a first ordinary bearing is provided between its second end and the upper connector. A rotating drum is sleeved outside the integral formed by the upper connector and the stator cylinder, and its first end is threadedly connected to the second end of the hanging block. A second thrust ball bearing is provided between the rotating drum and the tail end of the upper connector, and a second ordinary bearing is provided between the rotating drum and the stator bearing seat. The first rotor is disposed on the inner wall of the rotating cylinder and fixed to the rotating cylinder by a locking pin, and the first rotor is disposed corresponding to the first stator.

[0013] Preferably, the rotating assembly further includes a second rotor; The second rotor is disposed on the inner wall of the rotating drum and is located above the first rotor; The second rotor is fixed to the rotating drum by a locking pin, and the second rotor is arranged correspondingly to the second stator.

[0014] Preferably, in the dual-torque driven vibratory cementing float, a rotor spacer is provided between the first rotor and the second rotor. The rotor spacer is used to separate the first rotor and the second rotor and to limit the movement of the first rotor and the second rotor.

[0015] Preferably, the rotating assembly further includes an eccentric guide shoe and an eccentric block, wherein the dual-torque driven vibratory cementing float shoe is described. The eccentric guide shoe is threadedly connected to the second end of the rotating cylinder; The eccentric block is fixedly disposed on one side of the first end face of the eccentric guide shoe, so that the eccentric guide shoe with the eccentric block is located above the stator bearing seat; When the rotating drum drives the eccentric guide shoe to rotate, the eccentric block causes the fan-shaped opening to open or close alternately, generating periodic pressure fluctuations, forming axial excitation force, and inducing axial vibration. In addition, the eccentric block generates centrifugal force during rotation, which induces radial vibration.

[0016] Preferably, the dual-torque driven vibratory cementing float further includes an adapter, which is connected to the upper connector.

[0017] The present invention has the following advantages due to the adoption of the above technical solutions: (1) The tool of the present invention is easy to assemble and disassemble, and the internal parts are mainly connected by shafts and keys.

[0018] (2) The tool of the present invention has high safety. With the special connection method described above, no external opening is required, and it can be safely applied to complex working conditions.

[0019] (3) The tool of the present invention has a reasonable design structure, is easy to use, and has a low processing cost. It does not require changes to the existing cementing operation process. It has a long vibration amplitude range and a high vibration frequency, which can effectively improve the quality and efficiency of cementing operations. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the dual-torque driven vibration cementing float shoe described in this invention; Figure 2 This is a schematic diagram of the upper connector in the present invention; Figure 3 This is a schematic diagram of the structure of the hanging block in this invention; Figure 4 This is a schematic diagram of the rotating drum in this invention; Figure 5 This is a schematic diagram of the pressure ring in the present invention; Figure 6 This is a schematic diagram of the structure of the first rotor in this invention; Figure 7 This is a schematic diagram of the structure of the first stator in this invention; Figure 8 This is a schematic diagram of the stator cylinder in this invention; Figure 9 This is a schematic diagram of the locking pin in this invention; Figure 10 This is a schematic diagram of the structure of the first rupture disc in this invention; Figure 11 This is a schematic diagram of the rotor spacer ring in this invention; Figure 12 This is a schematic diagram of the stator spacer ring in this invention; Figure 13 This is a schematic diagram of the stator bearing housing in the present invention, wherein (b) is a top view of (a); Figure 14 This is a schematic diagram of the structure of the second rupture disc in this invention; Figure 15 This is a schematic diagram of the eccentric block in the present invention; Figure 16 This is a schematic diagram of the eccentric guide shoe in this invention; Figure 17 This is a schematic diagram of the bearing pressure ring in this invention; Figure 18 This is a schematic diagram of the structure of the third rupture disc in this invention; Figure 19 This is a schematic diagram of the adapter structure in this invention.

[0021] The labels for the attached figures are as follows: 1-Upper connector; 2-Stator cylinder; 3-First rupture disc; 4-First through hole; 5-First oblique hole; 6-First stator; 7-Stator bearing housing; 8-Second stator; 9-Second through hole; 10-Second rupture disc; 11-Second oblique hole; 12-Circular opening; 13-Fan-shaped opening; 14-Third rupture disc; 15-Pressure ring; 16-Stator spacer ring; 17-Hanging block; 18-First thrust ball bearing; 19-First ordinary bearing; 20-Rotor cylinder; 21-Second thrust ball bearing; 22-Second ordinary bearing; 23-First rotor; 24-Securing pin; 25-Second rotor; 26-Rotor spacer ring; 27-Eccentric guide shoe; 28-Eccentric block; 29-Adapter; 30-Bearing pressure ring; 31-Screw. Detailed Implementation

[0022] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0023] This invention provides a dual-torque driven vibratory cementing float shoe, which can reduce the incidence of cementing operation accidents under complex working conditions and improve cementing quality. At the same time, the tool has a simple structure, stable vibration, is easy to assemble and manufacture, has a long service life and strong applicability.

[0024] like Figure 1 As shown, the dual-torque driven vibration cementing float provided by the present invention includes: an upper connector 1 (see...) Figure 2 The stator assembly, threadedly connected to the upper connector 1, is used to change the flow direction of the cement fluid inside it; the rotating assembly, rotatably connected to the stator assembly, is used to rotate based on the change of the flow direction of the cement fluid, generating axial vibration and radial vibration.

[0025] In the above embodiments, preferably, the stator assembly includes: Stator cylinder 2 (see) Figure 8 Its first end is threaded to the tail end of the upper connector 1, and a first rupture disc 3 is provided in its middle (see...). Figure 10 The stator cylinder 2 located upstream of the first rupture disc 3 has several first through holes 4 on its cylinder wall, and the stator cylinder 2 located downstream of the first rupture disc 3 has several first oblique holes 5 on its cylinder wall; the first stator 6, several first stators 6 are respectively sleeved on the outside of the stator cylinder 2, and each first stator 6 is correspondingly set and connected to a first through hole 4.

[0026] In the above embodiment, preferably, the stator assembly further includes a stator bearing housing 7 and a second stator 8; a plurality of second through holes 9 are provided on the cylinder wall of the stator cylinder 2 located downstream of the first oblique hole 5, and a plurality of second stators 8 are respectively sleeved on the outside of the stator cylinder 2, and each second stator 8 is correspondingly provided and connected to a second through hole 9. The first end of the stator bearing housing 7 is threadedly connected to the second end of the stator sleeve 2; a second rupture disc 10 is provided inside the stator bearing housing 7 (see...). Figure 14 The second rupture disc 10 blocks the second end opening of the stator cylinder 2; a number of second oblique holes 11 are provided on the outer wall of the stator bearing seat 7 located downstream of the second rupture disc 10. A circular opening 12 is provided on one side of the end face of the second end of the stator bearing housing 7, and a fan-shaped opening 13 is provided on the other side of the end face (see...). Figure 13 A third rupture disc 14 is installed inside the circular opening 12 (see...). Figure 18 ).

[0027] In the above embodiments, preferably, the stator assembly further includes a pressure ring 15 (see... Figure 5 ) and stator spacer 16 (see Figure 12 The pressure ring 15 is disposed upstream of the first stator 6 forming an integral unit, and is used to limit the first stator 6; the stator spacer ring 16 is disposed upstream of the second stator 8 forming an integral unit, and is used to limit the second stator 8.

[0028] In the above embodiments, preferably, as follows: Figure 7 As shown, the first stator 6 or the second stator 8 includes: a stator body with an annular structure, and a plurality of oblique holes are provided on the outer annular surface of the stator body.

[0029] In the above embodiments, preferably, the rotating component includes: Hanging block 17 (see) Figure 3 A first thrust ball bearing 18 is provided between the first end of the fastener 17 and the upper connector 1, and a first ordinary bearing 19 is provided between the second end of the fastener 17 and the upper connector 1. Rotary drum 20 (see) Figure 4 The rotating cylinder 20 is fitted over the entire structure formed by the upper connector 1 and the stator cylinder 2, with its first end threadedly connected to the second end of the hanging block 17. A second thrust ball bearing 21 is provided between the rotating cylinder 20 and the tail end of the upper connector 1, and a second ordinary bearing 22 is provided between the rotating cylinder 20 and the stator bearing housing 7. A bearing pressure ring 30 is provided between the second thrust ball bearing 21 and the first ordinary bearing 19 (see...). Figure 17 ) First rotor 23 (see) Figure 6 ), is located on the inner wall of the rotating drum 20 and is connected to the rotating drum 20 by a locking pin 24 (see Figure 9 The first rotor 23 is fixed and is correspondingly set with the first stator 6.

[0030] In the above embodiments, preferably, the rotating assembly further includes a second rotor 25 (see...) Figure 6 The second rotor 25 is disposed on the inner wall of the rotating drum 20 and located above the first rotor 23; the second rotor 25 and the rotating drum 20 are connected by a locking pin 24 (see...). Figure 9 The second rotor 25 is fixed and is correspondingly set with the second stator 8.

[0031] In the above embodiment, preferably, a rotor spacer 26 is provided between the first rotor 23 and the second rotor 25 (see...). Figure 11 The rotor spacer 26 is used to separate the first rotor 23 and the second rotor 25 and to limit the movement of the first rotor 23 and the second rotor 25.

[0032] In the above embodiments, preferably, the rotating assembly further includes an eccentric guide shoe 27 (see... Figure 16 ) and eccentric block 28 (see Figure 15 The eccentric guide shoe 27 is threadedly connected to the second end of the rotating drum 20; the eccentric block 28 is fixedly disposed on one side of the first end face of the eccentric guide shoe 27, specifically, it is connected by screws 31 so that the eccentric guide shoe 27 with the eccentric block 28 is located above the stator bearing seat 7; when the rotating drum 20 drives the eccentric guide shoe 27 to rotate, the eccentric block 28 causes the fan-shaped opening 13 to open or close alternately, generating periodic pressure fluctuations, forming axial excitation force, and inducing axial vibration, and the eccentric block 28 generates centrifugal force during rotation, inducing radial vibration.

[0033] In the above embodiments, preferably, the present invention further includes an adapter 29 (see... Figure 19 ), adapter 29 is connected to upper connector 1. Adapter 29 is a 7 to 7.5 / 8 connector.

[0034] During operation, the cementing fluid (including water, drilling fluid, cementing mud, etc.) in the upper tubing flows into the stator cylinder 2 through the channel of the upper connector 1. Due to the first rupture disc 3 obstructing the axial flow of the fluid, the first stator 6 guides the fluid flow direction, passing through the first through hole 4, and forming a high-speed swirling flow within the first stator 6 that impacts the wall of the first rotor 23, generating torque and driving the rotating cylinder 20 to rotate. The fluid flows into the stator cylinder 2 through the first inclined hole 5. Under the obstruction of the second rupture disc 10, the second stator 8 guides the fluid flow direction, passing through the second through hole 9, and forming a high-speed swirling flow within the second stator 8 that impacts the wall of the second rotor 25, generating torque and driving the rotating cylinder 20 to rotate again. When the rotating cylinder 20 rotates, it drives the eccentric block 28 to rotate, generating centrifugal force and inducing radial vibration. Since the circular opening 12 is equipped with a third rupture disc 14, the eccentric block 28 acts as a baffle, and the fan-shaped opening 13 serves as an axial flow channel. As the eccentric block 28 rotates, the fan-shaped opening 13 alternately opens and closes, generating periodic pressure fluctuations, forming axial excitation force, and inducing axial vibration. At the same time, three rupture discs and a central flow channel are designed. When the central flow channel is blocked, pressure can be applied to break through the three rupture discs, opening up the central flow channel to establish a flow path and ensure smooth flow.

[0035] The dual-torque driven vibratory cementing float provided by this invention is installed at the lower end of the casing string and lowered to the bottom of the well. During the cementing process, fluid circulation causes it to generate continuous and regular strong vibrations, which act on the casing string and cement slurry, reducing friction and accelerating mud bonding. This invention features a reasonable design, simple operation, and low manufacturing cost. It does not require changes to existing cementing processes, has a long vibration amplitude range, and a high vibration frequency, improving the success rate and efficiency of cementing operations. This invention does not change the existing casing running process but improves operational efficiency, meeting the actual requirements of cementing operations under complex conditions. Primarily used in cementing operations, this invention ensures tool reliability through its special internal and external structure and generates vibration waves of a certain intensity throughout the well section. During cementing operations, it accelerates mud bonding, prevents mud-water mixing, improves cementing quality, and ensures operational safety.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-acting torque-driven vibratory cementing float, characterized in that, include: Top connector; The stator assembly, threadedly connected to the upper connector, is used to change the flow direction of the cement fluid inside it; A rotating assembly, rotatably connected to the stator assembly, is used to rotate based on changing the flow direction of the cement fluid, generating axial and radial vibrations.

2. The dual-torque driven vibratory cementing float shoe according to claim 1, characterized in that, The stator assembly includes: The stator cylinder has its first end threadedly connected to the tail end of the upper connector, and a first rupture disc is provided in its middle. Several first through holes are provided on the cylinder wall of the stator cylinder located upstream of the first rupture disc, and several first oblique holes are provided on the cylinder wall of the stator cylinder located downstream of the first rupture disc. The first stator, and several first stators are respectively sleeved on the outside of the stator cylinder, and each first stator is correspondingly set and connected to a first through hole.

3. The dual-torque driven vibratory cementing float shoe according to claim 2, characterized in that, The stator assembly also includes a stator bearing housing and a second stator; The stator cylinder located downstream of the first inclined hole has a plurality of second through holes on its cylinder wall, and a plurality of second stators are respectively sleeved on the outside of the stator cylinder, and each second stator is correspondingly provided with and connected to a second through hole; The first end of the stator bearing housing is threadedly connected to the second end of the stator cylinder; A second rupture disc is provided inside the stator bearing housing, and the second rupture disc blocks the second end opening of the stator cylinder; Several second oblique holes are provided on the outer wall of the stator bearing housing located downstream of the second rupture disc; A circular opening is provided on one side of the end face of the second end of the stator bearing housing, and a fan-shaped opening is provided on the other side of the end face; a third rupture disc is provided inside the circular opening.

4. The dual-torque driven vibratory cementing float shoe according to claim 3, characterized in that, The stator assembly further includes a pressure ring and a stator spacer ring. The pressure ring is disposed upstream of the plurality of first stators forming an integral unit and is used to limit the position of the first stators. The stator spacer ring is disposed upstream of a plurality of second stators forming a whole, and is used to limit the movement of the second stators.

5. The dual-torque driven vibratory cementing float shoe according to claim 3, characterized in that, The first stator or the second stator includes: a stator body with an annular structure, wherein a plurality of oblique holes are provided on the outer annular surface of the stator body.

6. The dual-torque driven vibratory cementing float shoe according to claim 3, characterized in that, The rotating component includes: A hanging block is sleeved on the upper connector. A first thrust ball bearing is provided between the first end of the hanging block and the upper connector, and a first ordinary bearing is provided between its second end and the upper connector. A rotating drum is sleeved outside the integral formed by the upper connector and the stator cylinder, and its first end is threadedly connected to the second end of the hanging block. A second thrust ball bearing is provided between the rotating drum and the tail end of the upper connector, and a second ordinary bearing is provided between the rotating drum and the stator bearing seat. The first rotor is disposed on the inner wall of the rotating cylinder and fixed to the rotating cylinder by a locking pin, and the first rotor is disposed corresponding to the first stator.

7. The dual-torque driven vibratory cementing float shoe according to claim 6, characterized in that, The rotating assembly also includes a second rotor; The second rotor is disposed on the inner wall of the rotating drum and is located above the first rotor; The second rotor is fixed to the rotating drum by a locking pin, and the second rotor is arranged correspondingly to the second stator.

8. The dual-torque driven vibratory cementing float shoe according to claim 7, characterized in that, A rotor spacer is provided between the first rotor and the second rotor. The rotor spacer is used to separate the first rotor and the second rotor and to limit the movement of the first rotor and the second rotor.

9. The dual-torque driven vibratory cementing float shoe according to claim 7, characterized in that, The rotating assembly also includes an eccentric guide shoe and an eccentric block; The eccentric guide shoe is threadedly connected to the second end of the rotating cylinder; The eccentric block is fixedly disposed on one side of the first end face of the eccentric guide shoe, so that the eccentric guide shoe with the eccentric block is located above the stator bearing seat; When the rotating drum drives the eccentric guide shoe to rotate, the eccentric block causes the fan-shaped opening to open or close alternately, generating periodic pressure fluctuations, forming axial excitation force, and inducing axial vibration. In addition, the eccentric block generates centrifugal force during rotation, which induces radial vibration.

10. The dual-torque driven vibratory cementing float shoe according to claim 1, characterized in that, It also includes an adapter that connects to the upper connector.

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