Flow channel conversion structure and dynamic pointing type rotary steering instrument

Abstract

This invention relates to a flow channel conversion structure and a dynamic directional rotary guide instrument. The flow channel conversion structure includes a first flow channel conversion structure disposed within a drill collar stub, to which a turbine generator is fixedly connected. The first flow channel conversion structure converts the upper central flow channel into an annular flow channel adapted to the turbine generator. The turbine generator is fixedly connected to a second flow channel conversion structure, to which a circuit frame is fixedly connected at its lower end. The second flow channel conversion structure converts the annular flow channel into an eccentric flow channel adapted to the circuit frame. The integrated structure formed by the first flow channel conversion structure, the turbine generator, the second flow channel conversion structure, and the circuit frame is confined between the upper and lower stubs. The flow channel conversion structure of this invention enables adjustment of the internal flow channels of a dynamic directional rotary guide instrument.

Description

Technical Field

[0001] This invention belongs to the field of downhole oil extraction technology, specifically relating to a flow channel conversion structure and a dynamic directional rotary guide instrument. Background Technology

[0002] Rotary steerable drilling technology is one of the most advanced directional drilling technologies in the world. Dynamic directional rotary steerable instruments achieve directional drilling by generating bends through internal mechanisms. In existing technologies, dynamic directional rotary steerable instruments integrate functions such as power generation, attitude measurement, and guidance control. Therefore, in the specific structural design, in order to meet the requirements of power generation and circuit board accommodation, a flow channel conversion structure is usually required to realize the transformation of the mud flow channel.

[0003] Therefore, it is urgent to develop a flow channel conversion structure to achieve the purpose of changing the mud flow channel. Summary of the Invention

[0004] In order to solve all or some of the above problems, the present invention aims to provide a flow channel conversion structure and a dynamic directional rotary guide instrument. The flow channel conversion structure of the present invention can achieve the purpose of adjusting the internal flow channel of the dynamic directional rotary guide instrument.

[0005] According to one aspect of the present invention, a flow channel conversion structure is provided, comprising a first flow channel conversion structure disposed within a drill collar stub, a turbine generator fixedly connected to the lower end of the first flow channel conversion structure, the first flow channel conversion structure being used to convert the upper central flow channel into an annular flow channel adapted to the turbine generator, a second flow channel conversion structure fixedly connected to the lower end of the turbine generator, a circuit frame fixedly connected to the lower end of the second flow channel conversion structure, the second flow channel conversion structure being used to convert the annular flow channel into an eccentric flow channel adapted to the circuit frame, the turbine generator being electrically connected to a circuit board on the circuit frame, the circuit board on the circuit frame being configured to be located within a first enclosed cavity isolated from the mud, the upper end of the drill collar stub being used to fixably connect to an upper stub, the lower end of the drill collar stub being used to fixably connect to a lower stub, and an integral structure formed by the first flow channel conversion structure, the turbine generator, the second flow channel conversion structure, and the circuit frame being confined between the upper stub and the lower stub.

[0006] Furthermore, the first flow channel conversion structure includes a first intermediate shaft and a first outer ring. The first outer ring is fitted around the first intermediate shaft, and the first intermediate shaft and the first outer ring are connected by a number of ribs. The lower end of the first intermediate shaft extends out of the first outer ring, and the lower end of the first intermediate shaft is fixedly connected to the turbine generator.

[0007] Furthermore, the second flow channel conversion structure includes a second intermediate shaft and a second outer ring body fitted outside the second intermediate shaft. The upper end of the second intermediate shaft extends outside the first outer ring body, and the upper end of the second intermediate shaft is fixedly connected to the turbine generator. The lower end of the second intermediate shaft is fixedly connected to the second outer ring body. An eccentric flow channel adapted to the circuit skeleton is formed between the second intermediate shaft and the second outer ring body. The outer side of the second outer ring body is fixedly connected to the circuit skeleton.

[0008] Furthermore, the lower end of the turbine generator is sealed to the upper end of the second intermediate shaft, so that a second closed cavity is formed between the turbine generator and the second intermediate shaft; an electrical wire channel is provided on the second intermediate shaft, one end of the electrical wire channel is connected to the first closed cavity, and the other end of the electrical wire channel is connected to the second closed cavity; the turbine generator is electrically connected to the circuit board on the circuit frame through a connecting wire provided in the electrical wire channel.

[0009] Furthermore, a connector is fixedly connected to the lower end of the circuit frame, and a third flow channel conversion structure is fixedly provided between the circuit frame and the connector. The third flow channel conversion structure is used to convert the eccentric flow channel into a central flow channel. The integrated structure formed by the first flow channel conversion structure, the turbine generator, the second flow channel conversion structure, the circuit frame, and the connector is limited between the upper short section and the lower short section.

[0010] Furthermore, the upper end of the connector is provided with an enlarged hole ring, the third flow channel conversion structure is disposed within the enlarged hole ring, and the upper end of the third flow channel conversion structure is limited by the circuit skeleton, the lower end of the third flow channel conversion structure is limited by the bottom wall of the enlarged hole ring, and the lower end of the third flow channel conversion structure is fixedly connected to the connector by a connecting pin.

[0011] Furthermore, the third flow channel conversion structure is provided with an eccentric flow channel and a central flow channel. The lower end of the eccentric flow channel is connected to the upper end of the central flow channel. The upper end of the eccentric flow channel extends upward to penetrate the third flow channel conversion structure, and the lower end of the central flow channel extends downward to penetrate the third flow channel conversion structure.

[0012] Furthermore, the upper end of the third flow channel conversion structure is provided with a rubber ring groove, and a rubber ring is provided in the rubber ring groove.

[0013] Furthermore, the second flow channel conversion structure is sealed to the drill collar short section, the second flow channel conversion structure is sealed to the upper end of the circuit skeleton, the lower end of the circuit skeleton is sealed to the connector, the connector is sealed to the lower short section, the lower short section is sealed to the drill collar short section, and the first enclosed cavity is formed by the second flow channel conversion structure, the circuit skeleton, the connector, the lower short section, and the drill collar short section.

[0014] According to another aspect of the present invention, a dynamic directional rotary guide instrument is provided, which is provided with the flow channel conversion structure described in any one of the above.

[0015] As can be seen from the above technical solution, the flow channel conversion structure and dynamic directional rotary guide instrument provided by the present invention have the following beneficial effects: The flow channel conversion structure of the present invention includes a first flow channel conversion structure, a second flow channel conversion structure, and a third flow channel conversion structure. The first flow channel conversion structure can convert the central flow channel into an annular flow channel to meet the installation requirements of the turbine generator. The second flow channel conversion structure is used to convert the annular flow channel into an eccentric flow channel to meet the requirements of the circuit skeleton for placing thick electronic components, thus meeting the strength requirements of the circuit skeleton and the installation space requirements of the circuit board. The third flow channel conversion structure is used to adjust the eccentric flow channel into a centered flow channel to meet the centered flow channel requirements of the subsequent instruments. Thus, the configuration of the present invention can achieve the purpose of adjusting the internal flow channel of the dynamic directional rotary guide instrument. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a flow channel conversion structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the first flow channel conversion structure according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the second flow channel conversion structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the second flow channel conversion structure according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the third flow channel conversion structure according to an embodiment of the present invention. Detailed Implementation

[0017] To better understand the purpose, structure, and function of this invention, the following detailed description of a flow channel conversion structure and a dynamic directional rotary guide instrument of this invention is provided in conjunction with the accompanying drawings.

[0018] like Figure 1As shown, this invention illustrates a flow channel conversion structure, including a first flow channel conversion structure 1 disposed within a drill collar sub 5. A turbine generator 2 is fixedly connected to the lower end of the first flow channel conversion structure 1. The first flow channel conversion structure 1 is used to convert the upper central flow channel into an annular flow channel adapted to the turbine generator 2. A second flow channel conversion structure 3 is fixedly connected to the lower end of the turbine generator 2. A circuit frame 4 is fixedly connected to the lower end of the second flow channel conversion structure 3. The second flow channel conversion structure 3 is used to convert the annular flow channel into an eccentric flow channel adapted to the circuit frame 4. The turbine generator 2 is electrically connected to a circuit board on the circuit frame 4. The circuit board on the circuit frame 4 is positioned within a first closed cavity isolated from the mud. The upper end of the drill collar sub 5 is used to fixably connect to an upper sub 9, and the lower end of the drill collar sub 5 is used to fixably connect to a lower sub 8. The overall structure formed by the first flow channel conversion structure 1, the turbine generator 2, the second flow channel conversion structure 3, and the circuit frame 4 is confined between the upper sub 9 and the lower sub 8.

[0019] The flow channel conversion structure of this invention includes a first flow channel conversion structure 1, a turbine generator 2, a second flow channel conversion structure 3, and a circuit frame 4. The first flow channel conversion structure 1 is used to convert the upper central flow channel into an annular flow channel adapted to the turbine generator 2 to meet the installation requirements of the turbine generator 2 and enable the turbine generator to generate electricity smoothly. The second flow channel conversion structure 3 is used to convert the annular flow channel into an eccentric flow channel adapted to the circuit frame 4 to meet the circuit frame's ability to place thick electronic devices, meet the circuit frame's strength requirements, and meet the circuit board's installation space requirements. The upper end of the drill collar short section 5 is used to fixally connect to the upper short section 9, and the lower end of the drill collar short section 5 is used to fixally connect to the lower short section 8. The overall structure formed by connecting the first flow channel conversion structure 1, the turbine generator 2, the second flow channel conversion structure 3, and the circuit frame 4 is confined within the drill collar short section 5 between the upper short section 9 and the lower short section 8.

[0020] Specifically, for the first flow channel conversion structure 1, such as Figure 2 As shown, it includes a first intermediate shaft 13 and a first outer ring 11. The first outer ring 11 is fitted over the first intermediate shaft 13. The first intermediate shaft 13 and the first outer ring 11 are connected by a number of ribs 12. The lower end of the first intermediate shaft 13 extends to the outside of the first outer ring 11, and the lower end of the first intermediate shaft 13 is fixedly connected to the turbine generator 2.

[0021] Specifically, the first flow channel conversion structure 1 of this embodiment includes a first intermediate shaft 13 and a first outer ring 11, which are connected by a plurality of ribs 12, for example as... Figure 2As shown, the two are connected by three ribs 12; the lower end of the first intermediate shaft 13 extends to the outside of the first outer ring 11 for fixed connection with the turbine generator 2. The first intermediate shaft 13 and the turbine generator 2 are fixedly connected, for example, by a threaded connection. The arrangement of the lower end of the first intermediate shaft 13 extending to the outside of the first outer ring 11 forms an annular flow channel between the first intermediate shaft 13 and the drill collar stub 5. This annular flow channel is connected to the upper central flow channel through the flow channel between the first intermediate shaft 13, the first outer ring 11 and several ribs 12. That is, the upper central flow channel is converted into an annular flow channel adapted to the turbine generator 2 through the flow channel between the first intermediate shaft 13, the first outer ring 11 and several ribs 12.

[0022] For the first intermediate shaft 13, such as Figure 2 As shown, it includes a small-diameter section at the top, a large-diameter section at the bottom, and a transition section in the middle. The diameter of the small-diameter section at the top is smaller than the diameter of the large-diameter section at the bottom, and the diameter of the transition section in the middle gradually transitions from being equal to the diameter of the small-diameter section to being equal to the diameter of the large-diameter section. This allows the central flow channel at the top to uniformly change into an annular flow channel adapted to the turbine generator 2 after passing through the flow channels between the first intermediate shaft 13, the first outer ring 11, and several ribs 12.

[0023] Among them, such as Figure 3 , Figure 4 As shown, the second flow channel conversion structure 3 includes a second intermediate shaft 31 and a second outer ring 32 sleeved outside the second intermediate shaft 31. The upper end of the second intermediate shaft 31 extends to the outside of the first outer ring 11, and the upper end of the second intermediate shaft 31 is fixedly connected to the turbine generator 2. The lower end of the second intermediate shaft 31 is fixedly connected to the second outer ring 32. An eccentric flow channel adapted to the circuit frame 4 is formed between the second intermediate shaft 31 and the second outer ring 32. The outer side of the second outer ring 32 is fixedly connected to the circuit frame 4.

[0024] Specifically, the upper end of the second intermediate shaft 31 extends beyond the first outer ring 11, forming an annular flow channel between the second intermediate shaft 31 and the drill collar stub 5. The upper end of the second intermediate shaft 31 is fixedly connected to the turbine generator 2. In specific implementations, for example, the two are fixedly connected by a threaded connection. An eccentric flow channel adapted to the circuit frame 4 is formed between the second intermediate shaft 31 and the second outer ring 32. The outer side of the second outer ring 32 is fixedly connected to the circuit frame 4, for example, the two are fixedly connected by a pin.

[0025] Among them, such as Figure 3As shown, the lower end of the turbine generator 2 is sealed to the upper end of the second intermediate shaft 31, so that a second closed cavity 10 is formed between the turbine generator 2 and the second intermediate shaft 31; an electrical wire channel 311 is provided on the second intermediate shaft 31, one end of the electrical wire channel 311 is connected to the first closed cavity 10, and the other end of the electrical wire channel 311 is connected to the second closed cavity; the turbine generator 2 is electrically connected to the circuit board on the circuit frame 4 through the connecting wire provided in the electrical wire channel 311.

[0026] Specifically, the lower end of the turbine generator 2 is sealed to the upper end of the second intermediate shaft 31, for example, by a sealing ring. After the turbine generator 2 and the second intermediate shaft 31 are sealed together, a second closed cavity 10 is formed between them. An electrical wire channel 311 is provided on the second intermediate shaft 31. The electrical wire channel 311 is used to accommodate the connecting wire so that the connecting wire can connect the turbine generator 2 to the circuit board on the circuit frame 4. One end of the electrical wire channel 311 is connected to the first closed cavity 10, and the other end of the electrical wire channel 311 is connected to the second closed cavity, so as to isolate the circuit and the mud.

[0027] The lower end of the circuit frame 4 is fixedly connected to the connector 7. A third flow channel conversion structure 6 is fixedly arranged between the circuit frame 4 and the connector 7. The third flow channel conversion structure 6 is used to convert the eccentric flow channel into the central flow channel. The overall structure formed by the first flow channel conversion structure 1, the turbine generator 2, the second flow channel conversion structure 3, the circuit frame 4 and the connector 7 is limited between the upper short section and the lower short section.

[0028] Here, the third flow channel conversion structure 6 is fixedly installed between the circuit skeleton 4 and the connector 7. The third flow channel conversion structure 6 is used to convert the eccentric flow channel into a central flow channel to provide a central flow channel for the instruments below. In specific implementation, the lower end of the circuit skeleton 4 is fixedly connected to the connector 7 by a pin.

[0029] The connector 7 has an expansion ring at its upper end, the third flow channel conversion structure 6 is located inside the expansion ring, the upper end of the third flow channel conversion structure 6 is limited by the circuit skeleton 4, the lower end of the third flow channel conversion structure 6 is limited by the bottom wall of the expansion ring, and the lower end of the third flow channel conversion structure 6 is fixedly connected to the connector 7 by the connecting pin 64.

[0030] Among them, such as Figure 5 As shown, the third flow channel conversion structure 6 is provided with an eccentric flow channel 61 and a central flow channel 62. The eccentric flow channel 61 is used to adapt to the circuit skeleton 4, and the central flow channel 62 is used to provide the central flow channel requirement for the subsequent instruments. The lower end of the eccentric flow channel 61 and the upper end of the central flow channel 62 are connected. The upper end of the eccentric flow channel 61 extends upward to penetrate the third flow channel conversion structure 6, and the lower end of the central flow channel 62 extends downward to penetrate the third flow channel conversion structure 6.

[0031] The upper end of the third flow channel conversion structure 6 is provided with a rubber ring groove 63, and a rubber ring is disposed within the rubber ring groove 63. The rubber ring here is used to axially limit the third flow channel conversion structure 6 to prevent the third flow channel conversion structure 6 from displacing in the axial direction.

[0032] The second flow channel conversion structure 3 is sealed to the drill collar short section 5, the second flow channel conversion structure 3 is sealed to the upper end of the circuit skeleton 4, the lower end of the circuit skeleton 4 is sealed to the connector 7, the connector 7 is sealed to the lower short section 8, the lower short section 8 is sealed to the drill collar short section 5, and the first enclosed cavity is formed by the second flow channel conversion structure 3, the circuit skeleton 4, the connector 7, the lower short section 8 and the drill collar short section 5.

[0033] The flow channel conversion structure of this invention includes a first flow channel conversion structure 1, a turbine generator, a second flow channel conversion structure 3, a circuit frame, a third flow channel conversion structure 6, and a connector 7. The first flow channel conversion structure 1 can convert the central flow channel into an annular flow channel to meet the installation requirements of the turbine generator. The second flow channel conversion structure 3 is used to convert the annular flow channel into an eccentric flow channel to meet the strength requirements of the circuit frame and the installation space requirements of the circuit board. The third flow channel conversion structure 6 is used to adjust the eccentric flow channel into a centered flow channel to meet the centered flow channel requirements of the subsequent instruments.

[0034] The flow channel conversion structure of this invention achieves the purpose of adjusting the flow channel according to actual needs, and enables the adjusted flow channel to meet the installation and setting purposes of turbine generators, circuit boards, etc.

[0035] This invention also provides a dynamic directional rotary guide instrument, which is provided with the flow channel conversion structure of any of the above embodiments.

[0036] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0037] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] 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 or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A flow channel conversion structure, characterized in that, The system includes a first flow channel conversion structure (1) disposed within a drill collar sub (5). A turbine generator (2) is fixedly connected to the lower end of the first flow channel conversion structure (1). The first flow channel conversion structure (1) is used to convert the upper central flow channel into an annular flow channel adapted to the turbine generator (2). A second flow channel conversion structure (3) is fixedly connected to the lower end of the turbine generator (2). A circuit frame (4) is fixedly connected to the lower end of the second flow channel conversion structure (3). The second flow channel conversion structure (3) is used to convert the annular flow channel into a circuit frame (4). The eccentric flow channel, the turbine generator (2) is electrically connected to the circuit board on the circuit frame (4), the circuit board on the circuit frame (4) is set in a first closed cavity isolated from the mud, the upper end of the drill collar short section (5) is used to fix the upper short section (9), the lower end of the drill collar short section (5) is used to fix the lower short section (8), and the overall structure formed by the first flow channel conversion structure (1), the turbine generator (2), the second flow channel conversion structure (3) and the circuit frame (4) is limited between the upper short section (9) and the lower short section (8).

2. The flow channel conversion structure according to claim 1, characterized in that, The first flow channel conversion structure (1) includes a first intermediate shaft (13) and a first outer ring (11). The first outer ring (11) is fitted over the first intermediate shaft (13). The first intermediate shaft (13) and the first outer ring (11) are connected by a number of ribs (12). The lower end of the first intermediate shaft (13) extends to the outside of the first outer ring (11), and the lower end of the first intermediate shaft (13) is fixedly connected to the turbine generator (2).

3. The flow channel conversion structure according to claim 1, characterized in that, The second flow channel conversion structure (3) includes a second intermediate shaft (31) and a second outer ring (32) sleeved outside the second intermediate shaft (31). The upper end of the second intermediate shaft (31) extends to the outside of the first outer ring (11), and the upper end of the second intermediate shaft (31) is fixedly connected to the turbine generator (2). The lower end of the second intermediate shaft (31) is fixedly connected to the second outer ring (32). An eccentric flow channel adapted to the circuit skeleton (4) is formed between the second intermediate shaft (31) and the second outer ring (32). The outer side of the second outer ring (32) is fixedly connected to the circuit skeleton (4).

4. The flow channel conversion structure according to claim 3, characterized in that, The lower end of the turbine generator (2) is sealed to the upper end of the second intermediate shaft (31) so that a second closed cavity (10) is formed between the turbine generator (2) and the second intermediate shaft (31); an electrical wire channel (311) is provided on the second intermediate shaft (31), one end of the electrical wire channel (311) is connected to the first closed cavity, and the other end of the electrical wire channel (311) is connected to the second closed cavity (10). The turbine generator (2) is electrically connected to the circuit board on the circuit frame (4) through the connecting wire provided in the electrical wire channel (311).

5. The flow channel conversion structure according to claim 1, characterized in that, The lower end of the circuit frame (4) is fixedly connected to a connector (7), and a third flow channel conversion structure (6) is fixedly provided between the circuit frame (4) and the connector (7). The third flow channel conversion structure (6) is used to convert the eccentric flow channel into a central flow channel. The overall structure formed by the first flow channel conversion structure (1), the turbine generator (2), the second flow channel conversion structure (3), the circuit frame (4), and the connector (7) is limited between the upper short section and the lower short section.

6. The flow channel conversion structure according to claim 5, characterized in that, The upper end of the connector (7) is provided with an expansion ring, the third flow channel conversion structure (6) is disposed in the expansion ring, and the upper end of the third flow channel conversion structure (6) is limited by the circuit skeleton (4), the lower end of the third flow channel conversion structure (6) is limited by the bottom wall of the expansion ring, and the lower end of the third flow channel conversion structure (6) is fixedly connected to the connector (7) by a connecting pin.

7. The flow channel conversion structure according to claim 5, characterized in that, The third flow channel conversion structure (6) is provided with an eccentric flow channel (61) and a central flow channel (62). The lower end of the eccentric flow channel (61) and the upper end of the central flow channel (62) are connected. The upper end of the eccentric flow channel (61) extends upward to penetrate the third flow channel conversion structure (6), and the lower end of the central flow channel (62) extends downward to penetrate the third flow channel conversion structure (6).

8. The flow channel conversion structure according to claim 5, characterized in that, The upper end of the third flow channel conversion structure (6) is provided with a rubber ring groove (63), and a rubber ring is provided in the rubber ring groove (63).

9. The flow channel conversion structure according to claim 5, characterized in that, The second flow channel conversion structure (3) is sealed to the drill collar short section (5), the second flow channel conversion structure (3) is sealed to the upper end of the circuit skeleton (4), the lower end of the circuit skeleton (4) is sealed to the connector (7), the connector (7) is sealed to the lower short section (8), the lower short section (8) is sealed to the drill collar short section (5), and the first closed cavity is formed by the second flow channel conversion structure (3), the circuit skeleton (4), the connector (7), the lower short section (8) and the drill collar short section (5).

10. A dynamic pointing rotary guide instrument, characterized in that, The flow channel conversion structure according to any one of claims 1-9 is provided.

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