A special water faucet and operating method for drilling equipment

Abstract

The application discloses a special water faucet flushing pipe for drilling equipment and an operating method, and is applied to the technical field of drilling and well repairing. The water faucet flushing pipe comprises a fixed mud pipe, a lower nut and a transition nut. The lower nut is fixedly connected with the fixed mud pipe and is static sealing. The transition nut is arranged around the fixed mud pipe, and the transition nut and the fixed mud pipe are dynamically sealed. The lower end of the transition nut is provided with an internal thread. The transition nut is connected with the upper end of the lower nut through the internal thread and is static sealing. When in use, the water faucet flushing pipe at least has: a state one that the fixed mud pipe is connected with the central pipe through the lower nut, and a state two that the transition nut is connected with the upper end of the lower nut on the basis of the state one. The structure and the operating method effectively solve the problems of poor dynamic sealing effect, short service life and frequent replacement of the water faucet flushing pipe combination, can realize quick assembly, improve the installation efficiency, simultaneously reduce the downtime, and improve the service life of the flushing pipe as a whole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling and workover, in particular to a special water faucet flush pipe for drilling and workover equipment and an operating method. BACKGROUND

[0002] The water faucet for drilling or workover not only has the function of lifting the drill string and circulating the mud, but also is an important rotating part. The water faucet flush pipe is a part for switching from the fixed function to the rotating function, and therefore the flush pipe assembly is a special sealing part mainly bearing the dynamic and static connection of the goose neck pipe and the top drive main shaft. At present, the flush pipe assembly structure mainly includes a packing type sealing flush pipe assembly and a mechanical sealing flush pipe assembly. The mechanical sealing flush pipe has high pressure resistance, but its cost is high and it is not suitable for the large vibration condition of drilling, so its promotion is limited to a certain extent. The packing type sealing has low price, simple structure and wide application range, but its service life is short, the replacement of the packing seal is time-consuming, and the safety of the well bottom is greatly affected. The promotion is also limited in the high pressure environment exceeding 35 MPa.

[0003] In summary, the flush pipe assembly structure commonly used under the current geological conditions has sealing problems. The flush pipe assembly structure will be sealed after being used in a high pressure stratum environment for a period of time. Once the sealing fails, the pressure will be out of control, and even drilling accidents will occur. Therefore, the sealing needs to be replaced in time to ensure safe operation. The intermediate connection part of the existing flush pipe structure adopts a floating type mud pipe 101, both ends of the floating type mud pipe 101 are connected with the goose neck pipe and the center pipe, a static sealing packing 102 is installed on the upper part of the floating type mud pipe 101, and a group of combined rotary dynamic sealing packing 103 is installed on the lower part of the floating type mud pipe 101. However, when the existing flush pipe assembly structure is replaced, the operator will spend a lot of time and energy to ensure the tightness of the sealing during the replacement and installation of the sealing structure, which leads to long drilling downtime, low operation efficiency, high cost, and also affects the safety of the well bottom, especially in the high pressure geological environment exceeding 35 MPa. After the sealing is replaced, the floating type mud pipe 101 cannot be positioned radially, plus installation errors, jumping, eccentricity during rotation, and accumulation of mud in the pipe after flush pipe leakage, etc., which leads to uneven stress on the external sealing of the floating type mud pipe 101, aggravates the eccentric wear, and the wear of the flush pipe and the center pipe is more serious, the sealing life is short, and thus the service life of the flush pipe is reduced. SUMMARY

[0004] The present application aims to overcome the above-mentioned deficiencies in the prior art, and provides a special water faucet flush pipe for drilling equipment and an operating method, effectively solving the problems of poor dynamic sealing effect, short service life and frequent replacement of the water faucet flush pipe combination, and reducing the amount of tooling for on-site installation and construction.

[0005] To achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0006] A special water faucet flush pipe for drilling equipment comprises a fixed mud pipe, a lower nut and a transition nut, the lower nut is fixedly connected with the fixed mud pipe and is a static seal, the transition nut is sleeved around the fixed mud pipe, and the transition nut and the fixed mud pipe are dynamically sealed, the lower end of the transition nut is provided with an internal thread, and the transition nut can be connected with the upper end of the lower nut through the internal thread and is a static seal.

[0007] When in use, the water faucet flush pipe at least has:

[0008] State one: the fixed mud pipe is connected with the central pipe through the lower nut, and the transition nut is not connected with the lower nut.

[0009] State two: on the basis of state one, the transition nut is connected with the upper end of the lower nut.

[0010] The original floating mud pipe is replaced, the original mud pipe can cause the packing seal to be eccentrically worn during operation, and the fixed mud pipe can always be fixed with the central pipe through the lower nut, ensuring the coaxiality of the mud pipe and the central pipe and avoiding repositioning. During drilling, if the seal fails, the transition nut can be connected with the lower nut outside the mud pipe to realize the assembly of a new seal, which can be quickly assembled. The transition nut adds another layer of seal to the failed seal between the lower nut and the mud pipe, so that the seal can be replaced and installed only by the transition nut, reducing the amount of tooling for on-site installation and construction. The transition nut and the lower nut are connected outside the mud pipe in a multi-level assembly manner, which can improve the installation efficiency and reduce the downtime, thereby improving the service life of the flush pipe as a whole.

[0011] In the preferred embodiment of the present application, the transition nut is provided with a plurality of transition nuts arranged above and below, and adjacent transition nuts are threadedly connected and statically sealed. Through the layering of the plurality of transition nuts, each transition nut can form a hierarchical arrangement with the lower nut, and in the case of seal failure of one transition nut, the new seal can be replaced and assembled in a stacked manner, and a plurality of combined levels can be used to seal the mud pipe.

[0012] In the preferred embodiment of the present application, the lower end of the transition nut is larger than the upper end, the internal thread of the transition nut is arranged circumferentially along the fixed mud pipe, and the upper end of the transition nut is provided with an external thread matching the internal thread of the transition nut; through the size setting of the upper and lower ends of the transition nut and the setting of the internal thread, the transition nut above can be conveniently and quickly connected with the transition nut or the lower nut below.

[0013] In the preferred embodiment of the present application, the faucet flushing pipe further comprises a transition static sealing ring and a dynamic sealing ring, the transition static sealing ring is arranged between the top of the upper end of the transition nut and the transition nut above, and the dynamic sealing ring is arranged between the lower nut and the fixed mud pipe and between the transition nut and the fixed mud pipe; the transition static sealing ring can ensure effective sealing between the transition nuts in a stacked relationship or between the transition nut and the lower nut, and the dynamic sealing ring can replace the old failed sealing and serve as a new sealing between the mud pipe and the transition nut.

[0014] In the preferred embodiment of the present application, the transition nut comprises a first intermediate transition nut and a second intermediate transition nut, the first intermediate transition nut and the second intermediate transition nut have a one-step structure in the longitudinal section, the upper end and the lower end are respectively the upper step part and the lower step part of the one-step structure, the lower end of the first intermediate transition nut is connected with the lower nut, and the lower end of the second intermediate transition nut is connected with the upper end of the first intermediate transition nut; through the setting of the step structure, the first intermediate transition nut and the second intermediate transition nut can form a stacked connection relationship on the outside of the mud pipe, facilitating the hierarchical sealing of the transition nut.

[0015] In the preferred embodiment of the present application, the transition static sealing ring comprises a first intermediate transition static sealing ring and a second intermediate transition static sealing ring, the first intermediate transition static sealing ring is arranged between the upper end face of the lower nut and the first intermediate transition nut, and the second intermediate transition static sealing ring is arranged between the top surface of the first intermediate transition nut and the second intermediate transition nut; the first intermediate transition static sealing ring realizes the sealing between the lower nut and the first intermediate transition nut, and the second intermediate transition static sealing ring realizes the sealing between the second intermediate transition nut and the first intermediate transition nut.

[0016] In the preferred embodiment of the present application, the dynamic sealing ring comprises a combined dynamic sealing ring, an intermediate transition combined dynamic sealing ring one and an intermediate transition combined dynamic sealing ring two, the combined dynamic sealing ring is arranged on the lower nut and surrounds the outer edge of the fixed mud pipe, the intermediate transition combined dynamic sealing ring one is arranged on the intermediate transition nut one and surrounds the outer edge of the fixed mud pipe, and the intermediate transition combined dynamic sealing ring two is arranged on the intermediate transition nut two and surrounds the outer edge of the fixed mud pipe; the sealing between the lower nut and the fixed mud pipe is realized through the combined dynamic sealing ring, the sealing between the intermediate transition nut one and the fixed mud pipe is realized through the intermediate transition combined dynamic sealing ring one, and the sealing between the intermediate transition nut two and the fixed mud pipe is realized through the intermediate transition combined dynamic sealing ring two.

[0017] In the preferred embodiment of the present application, the faucet flushing pipe further comprises a lower nut sealing ring and a mud pipe sealing ring, the fixed mud pipe is connected to the central pipe through the lower nut, the mud pipe sealing ring is arranged between the fixed mud pipe and the central pipe, and the lower nut sealing ring is arranged between the lower nut and the fixed mud pipe; the sealing between the lower nut and the fixed mud pipe is realized through the lower nut sealing ring, and the sealing between the fixed mud pipe and the central pipe is realized through the mud pipe sealing ring.

[0018] In the preferred embodiment of the present application, the faucet flushing pipe further comprises an upper nut and an upper sealing ring, the upper end of the fixed mud pipe is connected to the goose neck pipe through the upper nut, the stepped outer edge of the upper end of the fixed mud pipe and the inner edge of the upper nut are respectively provided with matching cooperation relationship threads, and the upper sealing ring is arranged between the fixed mud pipe and the goose neck pipe; the fixed mud pipe is connected to the goose neck pipe through the upper nut, the sealing between the upper nut and the fixed mud pipe is realized through the upper sealing ring, and the cooperation relationship threads ensure that the fixed mud pipe does not jump radially, thereby avoiding the combined sealing eccentric wear.

[0019] An operation method of a faucet flushing pipe special for drilling equipment, which adopts the faucet flushing pipe special for drilling equipment, and comprises the following steps:

[0020] S1, in the initial state, the fixed mud pipe is connected to the central pipe through the lower nut, and the transition nut is not connected to the lower nut;

[0021] S2, when the dynamic sealing between the lower nut and the fixed mud pipe fails, the transition nut is connected to the lower nut, and the dynamic sealing between the transition nut and the fixed mud pipe enters the working state;

[0022] S3, according to the principle of S2, when the transition nut sealing fails, the upper adjacent transition nut is connected to the lower corresponding transition nut, the dynamic sealing between the newly connected transition nut and the fixed mud pipe enters the working state, and the steps are repeated.

[0023] Through the use method, the fixed mud pipe can be coaxial with the central pipe and the goose neck pipe all the time, and when a new seal is replaced, the fixed mud pipe no longer needs to be calibrated, the seal eccentric wear is reduced, the service life of the seal is prolonged, the downtime is reduced, and the well control risk on site is reduced.

[0024] Compared with the prior art, the beneficial effects of the present application are:

[0025] 1. The flushing pipe replaces the original floating mud pipe, and the fixed mud pipe ensures the coaxiality of the mud pipe and the central pipe, avoids repositioning, and when a new seal is reinstalled due to seal failure, the transition nut is connected with the lower nut outside the mud pipe, which can be quickly assembled, reduces the amount of tooling for on-site installation and construction, and the multi-level assembly mode of the transition nut and the lower nut connected outside the mud pipe can improve the installation efficiency, reduce the downtime, and prolong the service life of the flushing pipe.

[0026] 2. Through the use method, the fixed mud pipe can be coaxial with the central pipe and the goose neck pipe all the time, the seal eccentric wear is reduced, the service life of the seal is prolonged, the downtime is reduced, and the well control risk on site is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a longitudinal section view of the flushing pipe of the prior art;

[0028] Figure 2 is a longitudinal section view of the flushing pipe of the flushing pipe of the drilling and production equipment special faucet of the embodiment 1 of the present application;

[0029] Figure 3 is a first layer working state schematic view of the flushing pipe of the flushing pipe of the drilling and production equipment special faucet of the embodiment 1 of the present application;

[0030] Figure 4 is a second layer working state schematic view of the flushing pipe of the flushing pipe of the drilling and production equipment special faucet of the embodiment 1 of the present application;

[0031] Figure 5 is a schematic view of the transition nut of the embodiment 2 of the present application;

[0032] Figure 6 is a schematic view of the operation method steps of the embodiment 3 of the present application.

[0033] Marked in the figure: 101-floating mud pipe, 102-static sealing packing, 103-combined rotary dynamic sealing packing, 1-upper nut, 2-intermediate transition nut two, 3-intermediate transition static sealing ring two, 4-intermediate transition static sealing ring one, 5-intermediate transition nut one, 6-lower nut sealing ring, 7-lower nut, 8-center pipe, 9-mud pipe sealing ring, 10-combined dynamic sealing ring, 11-intermediate transition combined dynamic sealing ring one, 12-thread, 13-intermediate transition combined dynamic sealing ring two, 14-fixed mud pipe, 15-matching relationship thread, 16-upper sealing ring, 17-gooseneck pipe. DETAILED DESCRIPTION

[0034] The application will be further described in connection with test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter of the application is limited to the following examples, and any technology realized based on the content of the application falls within the scope of the application.

[0035] Example 1

[0036] Please refer to Figure 2 , the embodiment provides a special water faucet flushing pipe for drilling equipment, which comprises an upper nut 1, a fixed mud pipe 14, a lower nut 7, a transition nut, a gooseneck pipe 17 and a center pipe 8, and a transition static sealing ring and a dynamic sealing ring, the fixed mud pipe 14 is connected to the gooseneck pipe 17 through the upper nut 1, the fixed mud pipe 14 is connected to the center pipe 8 through the lower nut 7, the transition nut is arranged outside the fixed mud pipe 14, the transition nut can be connected with the lower nut 7, and the transition nut is provided with at least one; When in use, the water faucet flushing pipe has at least two states: state one, the fixed mud pipe 14 is connected to the center pipe 8 through the lower nut 7, at this time the transition nut is not connected with the lower nut 7; State two, on the basis of state one, the transition nut is connected to the upper end of the lower nut 7. In the drilling use, the existing packing seal is easy to fail, that is, in the present scheme, the sealing between the corresponding fixed mud pipe 14 and the lower nut 7 is failed, and then the transition nut is connected with the lower nut 7 outside the mud pipe, so that quick assembly can be carried out, the transition nut reseals the failed sealing between the lower nut 7 and the mud pipe, so that the sealing can be replaced and installed only by the transition nut, the amount of tooling for on-site installation and construction is reduced, and the transition nut, the lower nut 7 and the like are connected outside the mud pipe in a multi-level assembly mode, which can improve the installation efficiency, reduce the downtime, and improve the service life of the flushing pipe as a whole.

[0037] In the embodiment, two transition nuts are provided, including the intermediate transition nut one 5 and the intermediate transition nut two 2 which are stacked in layers. The intermediate transition nut one 5 and the intermediate transition nut two 2 are both ring table structures with the size of the lower end larger than that of the upper end. The ring table structure is a one-step type, that is, the intermediate transition nut one 5 and the intermediate transition nut two 2 are one-step structures in the longitudinal section. Through the arrangement of the step structure, the intermediate transition nut one 5 and the intermediate transition nut two 2 can form a stacked connection relationship on the outside of the mud pipe, which is convenient for the hierarchical sealing of the transition nut. The intermediate transition nut one 5 and the intermediate transition nut two 2 are both divided into upper and lower parts. The upper end is the upper step part of the one-step structure, and the lower end is the lower step part of the one-step structure. The lower end of the intermediate transition nut one 5 and the intermediate transition nut two 2 is respectively concave with an internal thread which is along the outer wall of the fixed mud pipe 14. The upper end side of the intermediate transition nut one 5 and the intermediate transition nut two 2 is provided with an external thread 12 which surrounds the upper end. The lower end of the intermediate transition nut two 2 and the upper end of the intermediate transition nut one 5 are connected through thread matching. Similarly, the upper end side of the lower nut 7 is provided with an external thread 12 which surrounds the upper end. The lower end of the intermediate transition nut one 5 and the upper end of the lower nut 7 are connected through thread matching. In this way, through the arrangement of the upper and lower sizes of the transition nut and the arrangement of the internal thread, the transition nut above can be conveniently and quickly connected with the transition nut or the lower nut 7 below.

[0038] In the embodiment, the transition static seal ring is arranged between the top of the upper end of the transition nut and the upper adjacent transition nut, and the dynamic seal ring is arranged between the lower nut 7 and the fixed mud pipe 14 and between the transition nut and the fixed mud pipe 14. Specifically, the transition static seal ring includes the intermediate transition static seal ring one 4 and the intermediate transition static seal ring two 3. The position where the internal thread of the intermediate transition nut one 5 contacts the upper end of the lower nut 7 is provided with a ring of sealing grooves, and the intermediate transition seal ring one is arranged in the sealing groove. In this way, the upper end surface of the lower nut 7 and the intermediate transition nut one 5 are sealed through the intermediate transition static seal ring one 4. The position where the internal thread of the intermediate transition nut two 2 contacts the upper end of the intermediate transition nut one 5 is provided with a ring of sealing grooves, and the intermediate transition seal ring two is arranged in the sealing groove. In this way, the upper end surface of the intermediate transition nut one 5 and the intermediate transition nut two 2 are sealed through the intermediate transition static seal ring two 3. The transition static seal ring can ensure the effective sealing between the adjacent transition nuts in the stacked relationship or between the transition nut and the lower nut 7.

[0039] In this embodiment, the dynamic sealing ring comprises a combined dynamic sealing ring 10, an intermediate transition combined dynamic sealing ring one 11 and an intermediate transition combined dynamic sealing ring two 13. The inner edge of the lower nut 7 is in contact with the outer periphery of the fixed mud pipe 14. A sealing groove is recessed in the inner wall of the inner edge. The combined dynamic sealing ring 10 is placed in the sealing groove and surrounds the outer periphery of the fixed mud pipe 14. Thus, the inner edge of the lower nut 7 and the outer wall of the fixed mud pipe 14 are sealed by the combined dynamic sealing ring 10. The inner edge of the intermediate transition nut one 5 is in contact with the outer periphery of the fixed mud pipe 14. A sealing groove is recessed in the inner wall of the inner edge. The intermediate transition combined dynamic sealing ring one 11 is placed in the sealing groove and surrounds the outer wall of the fixed mud pipe 14. Thus, the inner edge of the intermediate transition nut one 5 and the outer wall of the fixed mud pipe 14 are sealed by the intermediate transition combined dynamic sealing ring one 11. The inner edge of the intermediate transition nut two 2 is in contact with the outer periphery of the fixed mud pipe 14. A sealing groove is recessed in the inner wall of the inner edge. The intermediate transition combined dynamic sealing ring two 13 is placed in the sealing groove and surrounds the outer wall of the fixed mud pipe 14. Thus, the inner edge of the intermediate transition nut one 5 and the outer wall of the fixed mud pipe 14 are sealed by the intermediate transition combined dynamic sealing ring one 11. The dynamic sealing ring can replace the old ineffective seal and serve as a new seal between the mud pipe and the transition nut.

[0040] In the embodiment, the sealing structure further comprises a lower nut sealing ring 6, a mud pipe sealing ring 9, an upper nut 1 and an upper sealing ring 16. The upper nut 1 is sleeved on the upper end of the fixed mud pipe 14, and the inner edge of the upper nut 1 is provided with an internal thread at the upper position. The outer edge of the lower end of the goose neck pipe 17 is provided with an external thread matched with the internal thread, so that the connection between the goose neck pipe 17 and the fixed mud pipe 14 is realized through the upper nut 1. The inner edge of the upper nut 1 is in contact with the outer edge of the upper end step of the fixed mud pipe 14. On the contact surface, the outer edge of the upper end step of the fixed mud pipe 14 and the inner edge of the upper nut 1 are respectively provided with matching cooperation relationship threads 15. The cooperation relationship threads 15 are concave-convex threads provided on the outer edge of the upper end step of the fixed mud pipe 14 and the inner edge of the upper nut 1. In this way, the accurate positioning between the fixed mud pipe 14 and the center pipe 8 can be ensured, and the radial runout of the fixed mud pipe 14 is avoided, so that the combined sealing eccentric wear is avoided. The end surface of the upper end of the fixed mud pipe 14 is concavely provided with a sealing groove, and the upper sealing ring 16 is arranged in the sealing groove. In this way, the fixed mud pipe 14 is connected to the goose neck pipe 17 through the upper nut 1, and the sealing between the center pipe 8 and the fixed mud pipe 14 is realized through the upper sealing ring 16. The lower nut 7 is sleeved on the lower end of the fixed mud pipe 14. The inner edge of the lower nut 7 is provided with an internal thread at the bottom end position. The outer edge of the upper end of the center pipe 8 is provided with an external thread matched with the internal thread. In this way, the connection between the fixed mud pipe 14 and the center pipe 8 is realized through the lower nut 7. The bottom end surface of the lower end of the fixed mud pipe 14 is concavely provided with a sealing groove, and the mud pipe sealing ring 9 is arranged in the sealing groove. In this way, the fixed mud pipe 14 is connected to the center pipe 8 through the lower nut 7, and the sealing between the fixed mud pipe 14 and the center pipe 8 is realized through the mud pipe sealing ring 9. The inner wall of the internal thread at the lower end of the lower nut 7 is provided with a sealing groove. The sealing groove is located at the position corresponding to the top end surface of the lower end of the fixed mud pipe 14. The lower sealing ring is arranged in the sealing groove. In this way, the sealing between the lower nut 7 and the fixed mud pipe 14 is realized through the lower nut sealing ring 6.

[0041] Please refer to Figure 3 and Figure 4 In the embodiment, through the stacking of a plurality of transition nuts, each transition nut can form a hierarchical arrangement with the lower nut. In the case of sealing failure of a transition nut, a new sealing can be replaced and assembled in a stacked manner. A plurality of combined levels can realize the sealing of the mud pipe, replacing the original floating mud pipe 101. The original mud pipe can cause the packing seal to eccentrically wear the mud pipe during operation. Through the lower nut 7, the fixed mud pipe 14 can always be fixed with the center pipe 8, ensuring the coaxiality of the mud pipe and the center pipe 8. The positioning operation between the mud pipe and the center pipe 8 is no longer needed, and the sealing can be reinstalled by directly rotating the transition nut.

[0042] Embodiment 2

[0043] Please refer to Figure 5 The present embodiment provides a special water faucet flushing pipe for drilling equipment, which comprises an upper nut 1, a fixed mud pipe 14, a lower nut 7, a transition nut, a swan neck pipe 17 and a center pipe 8, and a transition static seal ring and a dynamic seal ring. The structure of the present embodiment is basically the same as that of the water faucet flushing pipe in Embodiment 1, and the difference lies in that the structure of the transition nut is different. In the present embodiment, two transition nuts are provided, and different numbers of transition nuts can also be provided in other embodiments. The transition nut in the present embodiment does not adopt the ring table structure in Embodiment 1, but adopts a conical table structure.

[0044] In the present embodiment, the transition nut comprises an upper transition nut and a lower transition nut, and the structures of the two transition nuts are basically the same, except that the bottoms of the upper transition nut and the lower transition nut are provided differently. The bottom of the upper transition nut matches the top of the lower transition nut, and the bottom of the lower transition nut matches the upper end of the lower nut 7. The static sealing mode in Embodiment 1 is adopted between the upper transition nut and the lower transition nut, and between the lower transition nut and the lower nut 7. The dynamic sealing mode in Embodiment 1 is adopted between the transition nut and the fixed mud pipe 14, and between the lower nut 7 and the fixed mud pipe 14.

[0045] In the present embodiment, the outer diameters of the transition nut and the lower nut 7 are the same, and the bottoms of the upper transition nut and the lower transition nut are also provided with internal threads. The functions and connection objects are the same as in Embodiment 1. The top surface shape and structure of the transition nut are different. The top of the upper transition nut and the lower transition nut is in the shape of a conical table. The side of this structure is provided with external threads 12. The setting mode of the internal threads is different from that in Embodiment 1. The internal threads of the upper transition nut match the external threads 12 of the top of the lower transition nut. In this way, the bottom of the upper transition nut is in the shape of a conical table groove. The adjacent transition nuts are connected through the thread matching mode. The lower nut 7 in the present embodiment adopts the same structure as in Embodiment 1. The bottom internal threads of the lower transition nut are provided with the same structure as the bottom internal threads of the transition nut in Embodiment 1. The bottom of the lower transition nut is connected to the lower nut 7 through the thread matching mode. The structure is shown in Figure 5 .

[0046] Embodiment 3

[0047] Please refer to Figure 6 The present embodiment provides an operating method of a special water faucet flushing pipe for drilling equipment. The operating method of the water faucet flushing pipe for drilling equipment in Embodiment 1 or Embodiment 2 is adopted. The operating method of Embodiment 2 is consistent with that of Embodiment 1. The operating method of the water faucet flushing pipe in Embodiment 1 comprises the following steps:

[0048] S1, in the initial state, the fixed mud pipe 14 is connected with the central pipe 8 through the lower nut 7, the transition nut is not connected with the lower nut 7; the fixed mud pipe 14 is connected with the goose neck pipe 17 through the upper nut 1, and the transition nut is sleeved on the outside of the fixed mud pipe 14 and can rotate relative to the fixed mud pipe 14, the fixed mud pipe 14 can rotate synchronously with the central pipe 8 and the goose neck pipe 17, at this time only the lower nut 7 rotates with the central pipe 8.

[0049] S2, when the dynamic seal between the lower nut 7 and the fixed mud pipe 14 fails, the transition nut is connected with the lower nut 7, the dynamic seal between the transition nut and the fixed mud pipe 14 enters the working state, the fixed mud pipe 14 no longer needs to be rotated, repositioning is avoided, and new sealing can be realized only by rotating and connecting the transition nut; the actual sealing replacement is detected when the pressure is abnormal or replaced regularly according to experience, so that the sealing between the transition nut and the fixed mud pipe 14 is always tight. At this time, the upper nut 1, the fixed mud pipe 14, the upper sealing ring 16 do not rotate, the lower nut 7, the intermediate transition nut one 5, the intermediate transition nut two 2, the combined dynamic sealing ring 10, the intermediate transition combined dynamic sealing ring one 11, the intermediate transition combined dynamic sealing ring two 13, the lower nut sealing 6 and the mud pipe sealing ring 9 rotate with the central pipe 8 until the intermediate transition nut one 5 is connected and locked with the lower nut 7, at this time the intermediate transition combined dynamic sealing ring one 11 enters the working state, the combined dynamic sealing ring 10 and the intermediate transition combined dynamic sealing ring one 11 realize sealing together, and the lower part of the combined dynamic sealing ring 10 is fixedly connected with the end of the central pipe 8 to provide power for the intermediate transition combined dynamic sealing ring one 11.

[0050] S3, according to the principle of S2, when the transition nut connected with the lower nut 7 fails, the upper adjacent transition nut is connected with the lower corresponding transition nut, that is, a new transition nut is connected on the basis of the last used transition nut, the new and old two adjacent transition nuts are in a stacked relationship, that is, the intermediate transition nut two 2 is connected at the upper end of the intermediate transition nut one 5, the dynamic seal between the newly connected transition nut and the fixed mud pipe 14 enters the working state, at this time the combined dynamic sealing ring 10, the intermediate transition combined dynamic sealing ring one 11 and the intermediate transition combined dynamic sealing ring two 13 realize sealing together, and the bottom of the combined dynamic sealing ring 10 is fixedly connected with the end of the central pipe 8 to provide power for the intermediate transition combined dynamic sealing ring two 13 through the intermediate transition combined dynamic sealing ring one 11. Repeat the steps, the operation can be quickly operated, only through the threaded matching connection, the work load of the site installation is reduced, the sealing replacement and installation efficiency is improved, the downtime is reduced, and the well control risk on site is reduced.

[0051] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A drill rig specific swivel jet pipe, characterized in that, The fixed mud pipe (14), the lower nut (7) and the transition nut are included, the lower nut (7) is fixedly connected with the fixed mud pipe (14) and is static sealing, the transition nut is sleeved on the circumference of the fixed mud pipe (14), and the transition nut is dynamically sealed with the fixed mud pipe (14), the lower end bottom of the transition nut is provided with an internal thread, the transition nut can be connected with the upper end outer edge of the lower nut (7) and is static sealing through the internal thread; When used, the faucet flushing pipe at least has: State one, the fixed mud pipe (14) is connected with the central pipe (8) through the lower nut (7), and the transition nut is not connected with the lower nut (7); State two, on the basis of state one, the transition nut is connected on the upper end of the lower nut (7); The lower end size of the transition nut is greater than the upper end size, the internal thread of the transition nut is arranged along the circumference of the fixed mud pipe (14), and the upper end outer edge of the transition nut is provided with an external thread matched with the internal thread; The transition nut is provided with a plurality of transition nuts arranged up and down, and the adjacent transition nuts are threadedly connected and static sealing; through the layering of the plurality of transition nuts, each transition nut can form a hierarchical arrangement with the lower nut.

2. The drill-quip specific swivel kick pipe of claim 1, wherein, It also includes a transition static sealing ring and a dynamic sealing ring, the transition static sealing ring is arranged between the upper end top of the transition nut and the adjacent transition nut above, and the dynamic sealing ring is arranged between the lower nut (7) and the fixed mud pipe (14) and between the transition nut and the fixed mud pipe (14).

3. A drill rig service hose lance according to claim 2, characterised in that, The transition nut includes an intermediate transition nut one (5) and an intermediate transition nut two (2), the intermediate transition nut one (5) and the intermediate transition nut two (2) are one-level step structures in the longitudinal section, the upper end and the lower end are respectively the upper step part and the lower step part of the one-level step structure, the lower end of the intermediate transition nut one (5) is connected with the lower nut (7), and the lower end of the intermediate transition nut two (2) is connected with the upper end of the intermediate transition nut one (5).

4. The drill-ling equipment specific swivel kick pipe of claim 3, wherein, The transition static sealing ring includes an intermediate transition static sealing ring one (4) and an intermediate transition static sealing ring two (3), the intermediate transition static sealing ring one (4) is arranged between the upper end face of the lower nut (7) and the intermediate transition nut one (5), and the intermediate transition static sealing ring two (3) is arranged between the top surface of the intermediate transition nut one (5) and the intermediate transition nut two (2).

5. The drill-ling equipment specific swivel kick pipe of claim 3, wherein, The dynamic sealing ring includes a combined dynamic sealing ring (10), an intermediate transition combined dynamic sealing ring one (11) and an intermediate transition combined dynamic sealing ring two (13), the combined dynamic sealing ring (10) is arranged on the lower nut (7) and surrounds the outer periphery of the fixed mud pipe (14), the intermediate transition combined dynamic sealing ring one (11) is arranged on the intermediate transition nut one (5) and surrounds the outer periphery of the fixed mud pipe (14), and the intermediate transition combined dynamic sealing ring two (13) is arranged on the intermediate transition nut two (2) and surrounds the outer periphery of the fixed mud pipe (14).

6. The drill-assembly-specific water swabbing tube according to claim 1, characterized in that, Further comprising a lower nut sealing ring (6) and a mud pipe sealing ring (9), the fixed mud pipe (14) is connected to the central pipe (8) through the lower nut (7), the mud pipe sealing ring (9) is arranged between the fixed mud pipe (14) and the central pipe (8), and the lower nut sealing ring (6) is arranged between the lower nut (7) and the fixed mud pipe (14).

7. The drill-assembly-specific water swabbing tube according to claim 1, characterized in that, Further comprising an upper nut (1) and an upper sealing ring (16), the upper end of the fixed mud pipe (14) is connected to the goose neck pipe (17) through the upper nut (1), the outer edge of the step arranged on the upper end of the fixed mud pipe (14) and the inner edge of the upper nut (1) are respectively provided with matching cooperation relationship lines (15), and the upper sealing ring (16) is arranged between the fixed mud pipe (14) and the goose neck pipe (17).

8. A method of operating a drill rig specific swivel jet pipe according to any of the claims 1-7, characterized in that, The method comprises the following steps: S1, in the initial state, the fixed mud pipe (14) is connected to the central pipe (8) through the lower nut (7), and the transition nut is not connected to the lower nut (7); S2, when the dynamic seal between the lower nut (7) and the fixed mud pipe (14) fails, the transition nut is connected to the lower nut (7), and the dynamic seal between the transition nut and the fixed mud pipe (14) enters the working state; S3, according to the principle of S2, when the transition nut sealing fails, the upper adjacent transition nut is connected to the lower corresponding transition nut, the dynamic seal between the newly connected transition nut and the fixed mud pipe (14) enters the working state, and the steps are repeated.

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