While-drilling hydraulic control bypass circulation valve and bypass circulation method

Abstract

The invention relates to the technical field of hydraulic control bypass tools while drilling, in particular to a hydraulic control bypass circulating valve while drilling and a bypass circulating method.The hydraulic control bypass circulating valve while drilling comprises an upper connector, a body, a reset piece, a hydraulic control sliding sleeve, a guide screw and a lower connector, the body is in threaded connection between the upper connector and the lower connector, and the reset piece and the hydraulic control sliding sleeve are sequentially arranged on the inner side of the body from top to bottom; a boss is integrally arranged on the outer side of the lower end of the hydraulic control sliding sleeve. The hydraulic control sliding sleeve is reasonable and compact in structure and convenient to use, the hydraulic control sliding sleeve is adopted, the sliding sleeve can be hydraulically controlled to move, ball throwing is not needed, a tool is activated or closed through circulating displacement, and therefore the hydraulic control sliding sleeve is not limited by activation times, a ball basket is not needed, the effective length connected into a drill column can be shortened, convenience is brought to bottom drilling tool combination design, wellhead installation and transportation, and the working efficiency is improved. The hydraulic control sliding sleeve upper and lower end face pressure difference control tool can directly build pressure to activate the tool to build a circulation channel when a drill bit water hole is blocked or an annulus below the tool collapses, and convenience is provided for complex accident treatment or drilling.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulically controlled bypass tools while drilling, in particular to a hydraulically controlled bypass circulation valve while drilling and a bypass circulation method. Background Art

[0002] The circulating bypass tool is a ground-controlled, leak-proof and large-volume well-washing bypass tool that can realize multiple forward and lateral (bypass) alternating cycles. According to the number of activations of the tool, it can be divided into limited-time tools and unlimited-time tools. The number of activations of limited-time activation tools is limited by the length of the ball basket, and their use in complex working conditions is often restricted. After the functional ball of the limited-time activation tool completes the mechanical action, it falls into the lower ball basket, affecting the internal passability of the tool. With the continuous deepening of the development of deep wells, ultra-deep wells, and complex process wells, the leak-proof and large-volume well-washing processes have put forward requirements for more activation times, simpler operation, and higher stability for the circulating bypass tool. Summary of the invention

[0003] The present invention provides a hydraulically controlled bypass circulation valve while drilling and a bypass circulation method, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the existing limited activation tools are limited by the length of the ball basket and the activation ball is blocked and the number of activations is limited.

[0004] One of the technical solutions of the present invention is achieved through the following measures: a hydraulically controlled bypass circulation valve while drilling, comprising an upper joint, a body, a reset member, a hydraulically controlled sleeve, a guide screw, and a lower joint, wherein a body is threadedly connected between the upper joint and the lower joint, and a reset member and a hydraulically controlled sleeve are provided on the inner side of the body from top to bottom in sequence, a boss is integrally provided on the outer side of the lower end of the hydraulically controlled sleeve, the inner side of the upper end of the lower joint is in a cone shape with a larger upper portion and a smaller lower portion, the outer side of the lower side of the hydraulically controlled sleeve is seated on the upper side of the lower joint, a piston cavity is provided between the hydraulically controlled sleeve and the body at a position corresponding to the upper position of the boss, a transfer groove is provided along the circumference of the outer side of the middle part of the hydraulically controlled sleeve, a guide screw with an inner end located in the transfer groove is provided on the body, an outer circulation hole that passes through inside and outside is provided on the body corresponding to the position below the guide screw, and an inner circulation hole that passes through inside and outside is provided on the hydraulically controlled sleeve at a position corresponding to the position below the outer circulation hole.

[0005] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned reset member can be a butterfly spring assembly.

[0006] The above may also include an upper adjusting ring and a lower adjusting ring, and the upper side and the lower side of the butterfly spring assembly are respectively provided with an upper adjusting ring and a lower adjusting ring.

[0007] The above-mentioned indexing groove includes an upper indexing groove and a lower indexing groove. The upper indexing groove includes long grooves and short grooves arranged alternately, and the lower indexing groove includes short sliding grooves uniformly distributed along the circumference.

[0008] A U-shaped sealing ring may be provided between the inner side of the upper part of the above-mentioned hydraulic control sleeve and the main body, an O-shaped sealing ring may be provided between the boss and the main body, an O-shaped sealing ring may be provided between the outer side of the guide screw and the main body, and U-shaped sealing rings may be provided between the hydraulic control sleeve and the main body at the positions above and below the external circulation hole.

[0009] The above-mentioned indexing groove can be filled with hydraulic oil.

[0010] The above may also include a retaining ring, and a retaining ring is provided on the body corresponding to the outer end position of the guide screw.

[0011] A nozzle may be provided inside the outer circulation hole.

[0012] The main body may be provided with a hydraulic balance hole communicating with the upper portion of the piston cavity.

[0013] The lower part of the hydraulic control sliding sleeve may be integrally provided with a ring platform whose outer diameter is smaller than that of the boss.

[0014] The second technical solution of the present invention is achieved by the following measures: the bypass circulation method is carried out according to the following method: Step 1: Calculate the tool activation and shutdown displacement according to mud density, bottom hole assembly, and upper adjustment ring length; Step 2: Increase the circulation displacement to above the tool activation displacement. The area of ​​the lower side of the hydraulic control sleeve is larger than the area of ​​the upper side. There is a pressure difference. The larger the displacement, the greater the pressure difference. Until the hydraulic pressure pushes the hydraulic control sleeve to overcome the restoring force of the butterfly spring group and move upward, under the guidance of the guide screw group, the hydraulic control sleeve moves upward to the top. The internal circulation hole of the hydraulic control sleeve is located above the external circulation hole of the body, and is misaligned in the circumferential direction. Step 3: Reduce the circulation displacement to the normal drilling displacement or stop the pump. The restoring force of the butterfly spring group pushes the hydraulic control sleeve downward. Under the guidance of the guide screw group, the hydraulic control sleeve shifts and moves downward to the bottom. The inner circulation hole of the hydraulic control sleeve is aligned with the outer circulation hole of the body to establish a circulation channel and carry out corresponding operations. Step 4: After the operation is completed, increase the circulation displacement to above the closing displacement. The hydraulic pressure pushes the hydraulic control sleeve to overcome the restoring force of the butterfly spring group and move upward. Under the guidance of the guide screw group, the hydraulic control sleeve moves upward to the top. At this time, the inner circulation hole of the hydraulic control sleeve is located above the outer circulation hole of the body, and the circumferential direction is out of position; Step 5: Reduce the circulation displacement to the normal drilling displacement or stop the pump. The restoring force of the butterfly spring group pushes the hydraulic control sleeve downward. Under the guidance of the guide screw group, the hydraulic control sleeve rotates and moves downward to the bottom. The inner circulation hole of the hydraulic control sleeve is located below the outer circulation hole of the body, and the circumferential direction is out of position. The tool returns to the initial state.

[0015] The present invention has a reasonable and compact structure and is easy to use. It adopts a hydraulically controlled sleeve that can be moved by hydraulically controlling the sleeve without throwing a ball. The tool can be activated or closed by circulating displacement, so it is not limited by the number of activation times and does not require a ball basket. The effective length of the drill string can be shortened, which brings convenience to the bottom drilling tool assembly design, wellhead installation and transportation. The pressure difference control tool between the upper and lower end faces of the hydraulically controlled sleeve can establish a circulation channel by directly holding the pressure to activate the tool when the drill bit water hole is blocked or the annulus below the tool collapses, thereby providing convenience for complex accident handling or drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 This is a schematic diagram of the front half-section structure of Example 1 of the present invention.

[0017] Attached Figure 2 For attachment Figure 1 Schematic diagram of the main structure of the hydraulic control sleeve.

[0018] Attached Figure 3 For attachment Figure 2 Schematic diagram of the expanded structure of the hydraulically controlled sliding sleeve indexing groove.

[0019] The codes in the accompanying drawings are: 1 is the upper joint, 2 is the main body, 3 is the butterfly spring group, 4 is the hydraulic control sleeve, 5 is the guide screw, 6 is the lower joint, 7 is the boss, 8 is the external circulation hole, 9 is the internal circulation hole, 10 is the upper adjusting ring, 11 is the lower adjusting ring, 12 is the long groove, 13 is the short groove, 14 is the short slide groove, 15 is the U-shaped sealing ring, 16 is the O-shaped sealing ring, 17 is the hydraulic oil, 18 is the retaining ring, 19 is the nozzle, 20 is the hydraulic balance hole, 21 is the ring table, and 22 is the piston cavity. DETAILED DESCRIPTION

[0020] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0021] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0022] The present invention will be further described below in conjunction with embodiments and drawings: As attached Figure 1 , 2As shown in Figures 3 and 4, the hydraulically controlled bypass circulation valve while drilling comprises an upper joint 1, a body 2, a reset member, a hydraulically controlled sleeve 4, a guide screw 5 and a lower joint 6. The body 2 is threadedly connected between the upper joint 1 and the lower joint 6. The reset member and the hydraulically controlled sleeve 4 are arranged on the inner side of the body 2 from top to bottom in sequence. A boss 7 is integrally arranged on the outer side of the lower end of the hydraulically controlled sleeve 4. The inner side of the upper end of the lower joint 6 is in a cone shape with a larger upper portion and a smaller lower portion. The outer side of the lower side of the hydraulically controlled sleeve 4 is seated on the upper side of the lower joint 6. A piston cavity 22 is arranged between the hydraulically controlled sleeve 4 and the body 2 at a position corresponding to the upper position of the boss 7. A transfer groove is arranged along the circumference of the outer side of the middle part of the hydraulically controlled sleeve 4. The body 2 is provided with a guide screw 5 with the inner end thereof located in the transfer groove. The body 2 corresponding to the position below the guide screw 5 is provided with an outer circulation hole 8 which passes through inside and outside. The hydraulically controlled sleeve 4 corresponding to the position below the outer circulation hole 8 is provided with an inner circulation hole 9 which passes through inside and outside.

[0023] In the initial state, the internal circulation hole 9 of the hydraulically controlled sliding sleeve 4 is located below the external circulation hole 8 of the main body 2 and is axially misaligned. When a cuttings bed affects the drilling operation, cuttings are difficult to return, the drill bit water hole is blocked or the wellbore below the tool collapses and circulation cannot be established, the mud fluidity is poor and the wellhead is prone to mud spraying when drilling, etc., the hydraulically controlled bypass circulation valve while drilling can be activated as needed.

[0024] A boss 7 is integrally provided on the outer side of the lower end of the hydraulic control sleeve 4 to change the area between the upper and lower sides of the hydraulic control sleeve 4, so that there is a pressure difference between the upper and lower sides when liquid is injected into the middle of the device. When the pressure difference is large enough, the hydraulic control sleeve 4 can be pushed upward to overcome the restoring force of the reset component. The thrust depends on the drilling fluid displacement, drilling fluid density, and the minimum flow area at the bottom of the tool. The position of the hydraulic control sleeve 4 is controlled by controlling the circulation and controlling the displacement, and the tool is activated and closed. There is no need to throw a ball, so it is not limited by the number of activations and does not require a basket. The effective length of the drill string can be shortened, which brings convenience to the design of the bottom drilling tool assembly, wellhead installation, and transportation. The pressure difference control tool between the upper and lower ends of the hydraulic control sleeve 4 can establish a circulation channel by directly activating the tool by holding the pressure when the drill bit water hole is blocked or the annulus below the tool collapses, which provides convenience for complex accident handling or drilling.

[0025] The above-mentioned hydraulically controlled bypass circulation valve while drilling can be further optimized and / or improved according to actual needs: As attached Figure 1 As shown, the reset member is a butterfly spring group 3. The butterfly spring group 3 has better stability than the cylindrical spring.

[0026] As attached Figure 1 As shown, an upper adjusting ring 10 and a lower adjusting ring 11 are also included, and an upper adjusting ring 10 and a lower adjusting ring 11 are respectively provided on the upper side and the lower side of the butterfly spring group 3. The initial preload force of the butterfly spring group 3 is adjusted by installing the upper adjusting ring 10 and the lower adjusting ring 11 of different length specifications, and the butterfly spring group 3 is not compressed within the axial travel range of the hydraulic control sliding sleeve 4.

[0027] As attached Figure 1 , 2 As shown in FIG. 3 , the indexing groove includes an upper indexing groove and a lower indexing groove. The upper indexing groove includes long grooves 12 and short grooves 13 that are staggered, and the lower indexing groove includes short sliding grooves 14 that are evenly distributed along the circumference.

[0028] The working state represented by the position of the guide screw 5 during the working process is: Position a: initial state, the circulation hole of the body 2 and the circulation hole of the hydraulic control sleeve 4 are out of position in the axial and circumferential directions; Position b: Increase the circulating displacement to activate the tool, and the hydraulic pressure pushes the hydraulic control sleeve 4 to overcome the restoring force of the butterfly spring group 3 and rotate upward to the top; Position c: Reduce the circulation displacement or release the pressure, the butterfly spring group 3 pushes the hydraulic control sleeve 4 to rotate and move downward to the bottom, the circulation holes of the body 2 and the hydraulic control sleeve 4 are aligned, and a bypass circulation channel is established. At this time, large-volume well washing can be carried out to remove the cuttings bed, increase the annular return speed, and start drilling. Position d: When the circulation channel needs to be closed, the circulation displacement is increased, and the hydraulic pressure pushes the hydraulic control sleeve 4 to overcome the restoring force of the butterfly spring group 3 and shift upward to the top; Position e: Reduce the circulation displacement or release the pressure, the butterfly spring group 3 pushes the hydraulic control sleeve 4 to rotate and move downward to the bottom, the circulation holes of the body 2 and the hydraulic control sleeve 4 are out of position again, the bypass circulation channel is closed, and the tool returns to the initial state.

[0029] As attached Figure 1 As shown, a U-shaped sealing ring 15 is provided between the inner side of the upper part of the hydraulic control sleeve 4 and the body 2, an O-shaped sealing ring 16 is provided between the boss 7 and the body 2, an O-shaped sealing ring 16 is provided between the outer side of the guide screw 5 and the body 2, and a U-shaped sealing ring 15 is provided between the hydraulic control sleeve 4 and the body 2 at the positions above and below the external circulation hole 8. Leakage is prevented by providing sealing rings.

[0030] As attached Figure 1 As shown, the indexing groove is filled with hydraulic oil 17. The hydraulic oil 17 can prevent external solid phase from entering the cavity, affecting the indexing effect and can prevent rust.

[0031] As attached Figure 1 As shown, a retaining ring 18 is also included, and a retaining ring 18 is provided on the body 2 corresponding to the outer end of the guide screw 5. The guide screw 5 is threadedly connected to the body 2, and the retaining ring 18 is provided to prevent the guide screw 5 from loosening.

[0032] As attached Figure 1 As shown, a nozzle 19 is provided inside the outer circulation hole 8. The nozzle 19 is provided to avoid erosion of the body 2.

[0033] As attached Figure 1 As shown, the body 2 is provided with a hydraulic balance hole 20 which is in communication with the upper part of the piston cavity 22. The hydraulic balance hole 20 is provided to avoid the formation of a dead space when the hydraulic control sleeve 4 moves.

[0034] As attached Figure 1 , 2 As shown, the lower part of the hydraulic control sleeve 4 is integrally provided with a ring platform 21 having an outer diameter smaller than the boss 7. The ring platform 21 is provided to avoid the formation of a dead space when the hydraulic control sleeve 4 moves.

[0035] As attached Figure 1 , 2 As shown in , 3, the bypass circulation method is carried out according to the following method: Step 1: Calculate the tool activation and shutdown displacement according to the mud density, bottom hole assembly, and the length of the upper adjustment ring 10; Step 2: Increase the circulation displacement to above the tool activation displacement. The area of ​​the lower side of the hydraulic control sleeve 4 is larger than the area of ​​the upper side. There is a pressure difference. The larger the displacement, the greater the pressure difference. Until the hydraulic pressure pushes the hydraulic control sleeve 4 to overcome the restoring force of the butterfly spring group 3 and move upward, under the guidance of the guide screw group 5, the hydraulic control sleeve 4 moves upward to the top. The inner circulation hole 9 of the hydraulic control sleeve 4 is located above the outer circulation hole 8 of the body 2, and is misaligned in the circumferential direction. Step 3: Reduce the circulation displacement to the normal drilling displacement or stop the pump. The restoring force of the butterfly spring group 3 pushes the hydraulic control sleeve 4 downward. Under the guidance of the guide screw group 5, the hydraulic control sleeve 4 rotates and moves downward to the bottom. The inner circulation hole 9 of the hydraulic control sleeve 4 is aligned with the outer circulation hole 8 of the body 2 to establish a circulation channel and perform corresponding operations. Step 4: After the operation is completed, the circulation displacement is increased to above the closing displacement. The hydraulic pressure pushes the hydraulic control sleeve 4 to overcome the restoring force of the butterfly spring group 3 and move upward. Under the guidance of the guide screw group 5, the hydraulic control sleeve 4 moves upward to the top. At this time, the inner circulation hole 9 of the hydraulic control sleeve 4 is located above the outer circulation hole 8 of the body 2, and the circumferential direction is out of position; Step 5: Reduce the circulation displacement to the normal drilling displacement or stop the pump. The restoring force of the butterfly spring group 3 pushes the hydraulic control sleeve 4 downward. Under the guidance of the guide screw group 5, the hydraulic control sleeve 4 rotates and moves downward to the bottom. The inner circulation hole 9 of the hydraulic control sleeve 4 is located below the outer circulation hole 8 of the body 2, and the circumferential direction is out of position. The tool returns to the initial state.

[0036] It can be activated and shut down unlimited times according to the needs of the site.

[0037] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A hydraulically controlled bypass circulation valve while drilling, characterized in that It includes an upper joint, a main body, a reset piece, a hydraulic control sleeve, a guide screw and a lower joint. The main body is threadedly connected between the upper joint and the lower joint. The inner side of the main body is provided with a reset piece and a hydraulic control sleeve in sequence from top to bottom. A boss is integrally provided on the outer side of the lower end of the hydraulic control sleeve. The inner side of the upper end of the lower joint is in a cone shape with a larger upper part and a smaller lower part. The outer side of the lower side of the hydraulic control sleeve is seated on the upper side of the lower joint. A piston cavity is provided between the hydraulic control sleeve and the main body at a position corresponding to the upper part of the boss. A transfer groove is provided along the circumference of the outer side of the middle part of the hydraulic control sleeve. A guide screw with the inner end located in the transfer groove is provided on the main body. An outer circulation hole that penetrates inside and outside is provided on the main body corresponding to the position below the guide screw. An inner circulation hole that penetrates inside and outside is provided on the hydraulic control sleeve at a position corresponding to the position below the outer circulation hole.

2. The hydraulically controlled bypass circulation valve while drilling according to claim 1 is characterized in that The reset element is a butterfly spring assembly.

3. The hydraulically controlled bypass circulation valve while drilling according to claim 2 is characterized in that It also includes an upper adjusting ring and a lower adjusting ring. The upper side and the lower side of the butterfly spring group are respectively provided with the upper adjusting ring and the lower adjusting ring.

4. The hydraulically controlled bypass circulation valve while drilling according to claim 1, 2 or 3, characterized in that The indexing groove includes an upper indexing groove and a lower indexing groove, the upper indexing groove includes long grooves and short grooves arranged alternately, and the lower indexing groove includes short sliding grooves uniformly distributed along the circumference; or / and, a U-shaped sealing ring is provided between the inner side of the upper part of the hydraulic control sleeve and the main body, an O-shaped sealing ring is provided between the boss and the main body, an O-shaped sealing ring is provided between the outer side of the guide screw and the main body, and U-shaped sealing rings are provided between the hydraulic control sleeve and the main body at the positions above and below the corresponding external circulation hole.

5. The drilling hydraulically controlled bypass circulation valve according to claim 1, 2 or 3, characterized in that The indexing groove is filled with hydraulic oil.

6. The hydraulically controlled bypass circulation valve while drilling according to claim 4, characterized in that The indexing groove is filled with hydraulic oil.

7. The drilling hydraulically controlled bypass circulation valve according to claim 1, 2, 3 or 6, characterized in that It also includes a retaining ring, which is provided on the main body corresponding to the outer end position of the guide screw; or / and, a nozzle is provided on the inner side of the external circulation hole; or / and, a hydraulic balance hole connected to the upper part of the piston cavity is provided on the main body; or / and, a ring platform with an outer diameter smaller than the boss is integrally provided at the lower part of the hydraulic control sleeve.

8. The hydraulically controlled bypass circulation valve while drilling according to claim 4, characterized in that It also includes a retaining ring, which is provided on the main body corresponding to the outer end position of the guide screw; or / and, a nozzle is provided in the external circulation; or / and, a hydraulic balance hole connected to the upper part of the piston cavity is provided on the main body; or / and, a ring platform with an outer diameter smaller than the boss is integrally provided at the lower part of the hydraulic control sleeve.

9. The hydraulically controlled bypass circulation valve while drilling according to claim 5, characterized in that It also includes a retaining ring, which is provided on the main body corresponding to the outer end position of the guide screw; or / and, a nozzle is provided in the external circulation; or / and, a hydraulic balance hole connected to the upper part of the piston cavity is provided on the main body; or / and, a ring platform with an outer diameter smaller than the boss is integrally provided at the lower part of the hydraulic control sleeve.

10. A bypass circulation method using the drilling hydraulically controlled bypass circulation valve as claimed in any one of claims 4 to 9, characterized in that Follow the steps below, Step 1: Calculate the tool activation and shutdown displacement according to mud density, bottom hole assembly, and upper adjustment ring length; Step 2: Increase the circulation displacement to above the tool activation displacement. The area of ​​the lower side of the hydraulic control sleeve is larger than the area of ​​the upper side. There is a pressure difference. The larger the displacement, the greater the pressure difference. Until the hydraulic pressure pushes the hydraulic control sleeve to overcome the restoring force of the butterfly spring group and move upward, under the guidance of the guide screw group, the hydraulic control sleeve moves upward to the top. The internal circulation hole of the hydraulic control sleeve is located above the external circulation hole of the body, and is misaligned in the circumferential direction. Step 3: Reduce the circulation displacement to the normal drilling displacement or stop the pump. The restoring force of the butterfly spring group pushes the hydraulic control sleeve downward. Under the guidance of the guide screw group, the hydraulic control sleeve shifts and moves downward to the bottom. The inner circulation hole of the hydraulic control sleeve is aligned with the outer circulation hole of the body to establish a circulation channel and carry out corresponding operations. Step 4: After the operation is completed, increase the circulation displacement to above the closing displacement. The hydraulic pressure pushes the hydraulic control sleeve to overcome the restoring force of the butterfly spring group and move upward. Under the guidance of the guide screw group, the hydraulic control sleeve moves upward to the top. At this time, the inner circulation hole of the hydraulic control sleeve is located above the outer circulation hole of the body, and the circumferential direction is out of position; Step 5: Reduce the circulation displacement to the normal drilling displacement or stop the pump. The restoring force of the butterfly spring group pushes the hydraulic control sleeve downward. Under the guidance of the guide screw group, the hydraulic control sleeve rotates and moves downward to the bottom. The inner circulation hole of the hydraulic control sleeve is located below the outer circulation hole of the body, and the circumferential direction is out of position. The tool returns to the initial state.

Images