CN109505527B - A wear-resistant joint for drill pipe and riser and its use - Google Patents

Abstract

The invention relates to a joint for abrasion prevention of a drill rod and a marine riser and a use method thereof. The connector comprises a connector inner assembly, a connector outer assembly, an anti-abrasion block mounting groove bolt, a female thread, a male thread, a bolt hole, a metal bolt anti-abrasion barrel, a limiting ring, a limiting groove gear ring, a motor, a starting gear, a microcomputer, a data line hole, a magnetic connector, a pressure sensor and a storage battery. The joint external component and the joint internal component can relatively rotate under normal working conditions, and when the friction force between the drill rod and the water isolation pipe is overlarge during drilling operation, and the joint external component cannot relatively move relative to the water isolation pipe, the joint external component can be driven to rotate by a closed-loop control system consisting of an internal pressure sensor, a microcomputer and an electric motor. The anti-module is replaceable. The invention has the advantages that: the module replacement prevention is simple and convenient to install, and the cost is saved; by using the ring control system, the abrasion of the water isolation pipe and the drill rod is effectively reduced, and the service life of the anti-abrasion joint is prolonged.

Description

A wear-resistant joint for drill pipe and riser and its use

technical field

The invention relates to the technical field of oilfield equipment, and relates to a wear-resistant joint for drill pipes and water risers and a method for using it.

Background technique

The biggest difference between deepwater drilling and land drilling is that there is a special device between the drilling platform and the seabed, that is, the riser. The main function of the riser is to isolate seawater, form a circulation channel for drilling fluid, establish a channel for drilling tools to enter the formation, and connect additional pipelines in series. In seawater, the riser is subject to marine environmental loads, and is prone to bending deformation and vortex-induced vibration. When the riser undergoes bending deformation and vortex-induced vibration, the inner wall of the riser will be contacted and worn with the drill pipe joint and the outer wall. Long-term contact and wear will reduce the thickness of the riser wall, which will greatly reduce the strength of the riser and cause breakage accidents of the riser. Therefore, it is of great practical significance to invent a joint for wear resistance of drill pipe and riser and its use method. Among the existing anti-wear patents for drill pipe and riser, some use balls and some use rollers. They are basically steel structures. Steel structure ball rollers are wear-resistant, but at the same time, the gaps between parts are prone to malfunction due to sediment or other impurities. If it rotates, the anti-wear effect will decrease, and the riser may be damaged. Usually, the anti-friction street of the present invention with split type will rub against the wall of the riser at the dog leg of the riser during the working process, causing the relative rotation between it and the riser to stop. The present invention utilizes the closed-loop control system to effectively reduce the friction between the riser and the joint under the above-mentioned special working conditions and prolong the service life of the joint. The anti-wear block is made of polyurethane elastomer material which is much better than other materials in anti-wear performance. It has stronger protection ability for drill pipe and riser, will not damage the riser, and is low in cost and easy to assemble.

Contents of the invention

A wear-resistant joint for drill pipes and risers and its use method, characterized in that it includes joint internal components, joint external components, wear-resistant blocks, wear-resistant block installation grooves, pins, female threads, male threads, and pin holes , metal pin anti-wear cylinder, limit ring, limit groove, gear ring, motor, start gear, microcomputer, data line, data line hole, magnetic joint, pressure sensor, battery; the internal components of the joint are separated by threads on both sides It is connected with two drill pipes, and the limit rings at both ends cooperate with the limit grooves on the external components of the joint. Each contact surface between the limit ring and the limit groove should be sealed with packing, filled with multi-layer carbon fiber and rubber , to axially fix the joint external assembly and allow the joint external assembly to rotate around the joint internal assembly; the side where the joint external assembly matches the joint internal assembly installs a microcomputer and a motor, and the motor and the starting gear are connected by a key, and the starting gear is connected to and The internal components of the joint are tightly connected and welded, and the tight gear rings mesh with each other. The fittings are lubricated by an oil bath, and the lubricating oil is immersed in the upper part of the gear ring; the outer parts of the joint are equipped with evenly distributed anti-wear block installation grooves; Two bolts with springs are installed on the two axial sides respectively, and a magnetic joint is installed at the position of the data line hole on the bottom plane; the bolt hole is installed on the anti-wear block, and the metal bolt is installed with interference fit and special glue in the bolt hole to prevent wear Cylinder; in the forming stage of the anti-wear block, the pressure sensor is installed at a certain depth on the streamlined surface end, the magnetic joint is installed on the flat end, and the magnetic joint and the pressure sensor are connected by a data line; the position of the magnetic joint on the anti-wear block Cooperate with the position of the magnetic joint on the anti-wear block installation groove, so that it can be attracted and connected during normal work, and the collected data can be transmitted to the microcomputer in real time. The magnetic joint on the connector charges the battery; the metal pin on the anti-friction block is inside the anti-friction cylinder, so that the anti-friction block is fixed on the external components of the joint, and the gap between the anti-friction block and the external components of the joint is glued with a special adhesive combined reinforcement.

Further, the anti-wear block is made of polyurethane elastomer material, and a pressure sensor is installed inside it during the forming stage of the anti-wear block.

Furthermore, the exposed part of the anti-wear block is streamlined, with the lower part being larger and the upper part being smaller, so as to reduce the impact of drilling fluid and vortex-induced vibration.

Further, there is a pin hole on the anti-wear block, and a pin is inserted into the pin hole to fix the anti-wear block on the anti-module installation groove.

Furthermore, a spring is welded at the end of the bolt, which can be pushed and released during installation. The anti-wear block is covered with the joint for a week, and there are two upper and lower layers.

Further, there is a metal bolt anti-wear cylinder corresponding to the pin hole on the anti-wear block to prevent the bolt from cutting off the anti-wear block when the force is too large.

Further, the data line between the pressure sensor and the microcomputer is connected by a magnetic joint at the anti-wear block and the anti-wear block slot.

Further, the external assembly of the joint is equipped with a microcomputer, a motor, and a pressure sensor to form an intelligent closed-loop control system. When the friction between the external assembly of the joint and the inner wall of the riser is too large, resulting in no relative rotation between the external assembly of the joint and the riser, the motor prevention device can be activated in time damage.

Further, the electric motor transmits the torque it generates to the internal components of the joint through the starting gear and the gear ring.

A method for using a joint for drill pipe and water riser wear prevention, which includes the following installation and use steps:

S1. Install the metal pin anti-wear cylinder into the pin hole on the anti-wear block.

S2. Insert the spring end of the bolt into the pin hole on the installation groove of the wear-resistant block, compress the spring with a sheet tool, put it into the wear-resistant block, remove the sheet-shaped compression tool, and the bolt will automatically spring into the bolt on the installation groove of the wear-resistant block inside the hole.

S3. Inject the special adhesive into the gap between the anti-wear block and the installation groove of the anti-wear block, seal the gap, and strengthen the connection between the anti-wear block and the external components of the joint.

S4. Engage the external thread of one end of one drill pipe with the female thread of the internal components of the joint, and the internal thread of one end of the other drill pipe with the male thread of the internal components of the joint to connect the two drill pipes and install them on the riser legs.

S5. During the working process, the inner wall of the riser and the external components of the joint will generate huge friction, which will cause the relative rotation between the external components of the joint and the riser to stop, and the anti-wear block at the contact will bear huge stress. At this time, the pressure sensor in the anti-wear block receives a large pressure signal, converts it into an electrical signal, and transmits it to the microcomputer through the data line. The microcomputer sends instructions to control the motor to rotate in the opposite direction of the drill pipe rotation direction. The microcomputer timely adjusts the torque output by the motor according to the data fed back by the pressure sensor. Relative rotation of the joint outer assembly and riser reappeared, reducing wear on several wear pads.

S6. When the anti-wear block is worn out, take it out with the drill pipe, remove the worn anti-wear block, and replace it with a new anti-wear block before continuing to use it.

The present invention has the following advantages:

1. The polyurethane elastomer material with excellent wear resistance is used as the anti-wear block material, which has stronger protection ability for drill pipe and riser and will not damage the riser.

2. There is a metal bolt anti-wear cylinder corresponding to the pin hole on the anti-wear block to prevent the plug from cutting off the anti-wear block when the force is too large.

3. The exposed part of the anti-wear block is streamlined, the lower part is larger and the upper part is smaller, which reduces the impact of drilling fluid and vortex induced vibration.

4. When the joint and the riser cannot rotate relative to each other, the closed-loop control system can be used to make it rotate relative to each other, reducing the friction between the riser and the joint and prolonging the service life of the joint.

5. The anti-blocking module can be replaced.

Description of drawings

Figure 1 - side view of wear block;

Figure 2 - Detailed view of pin installation;

Figure 3 - Sectional view of the joint;

Figure 4 - Front view of the connector;

Figure 5 - the front view structure of the joint;

In the figure: 1. Internal components of the joint; 2. External components of the joint; 3. Anti-wear block; 4. Mounting groove of the anti-wear block; 5. Pin; 6. Female thread; ;9, metal bolt anti-wear cylinder; 10, limit ring; 11, limit groove; 12, gear ring; 13, motor; 14, start gear; 15, microcomputer; 16, data line; 17, data line hole ; 18. Magnetic connector; 19. Pressure root passer; 20. Battery; 21. Mounting slot pin hole.

Specific implementation method

The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:

As shown in Figures 1 to 5, a method for using a wear-resistant joint between a drill pipe and a riser, the joint includes a joint internal component 1, a joint external component 2, an anti-wear block 3, and a wear-resistant block installation groove 4, 5 pins, 6 female threads, 7 male threads, 8 pin holes of anti-wear block, 9 metal pin anti-wear barrels, 10 limit rings, 11 limit slots, gear ring 12, motor 13, starting gear 14, microcomputer 15 , data line 16 , data line hole 17 , magnetic joint 18 , pressure sensor 19 , storage battery 20 , mounting groove pin hole 21 ; the inner component 1 of the joint is respectively connected to two drill pipes through threads on both sides, and the two ends The limit ring 10 cooperates with the limit groove 11 on the joint external component 2, and each contact surface between the limit ring 10 and the limit groove 11 is sealed with packing, filled with multi-layer carbon fiber and rubber, and the joint external component is axially fixed 2 and make the joint external component 2 rotate around the joint internal component 1; the side where the joint external component 2 cooperates with the joint internal component 1 is installed with a microcomputer 15 and a motor 13, and the motor 13 is connected with the starting gear 14 by a key, and the starting gear 14 and the gear ring 12 that is closely connected and welded tightly with the internal component of the joint 1 mesh with each other, and the joint is lubricated by an oil bath, and the lubricating oil is immersed in the upper part of the gear ring 12; the outer part of the joint external component 2 is provided with evenly distributed anti-wear block installation grooves 4; The two axial sides of the wear-resistant block installation groove 4 are respectively installed with two installation groove pin holes 21, and the spring-loaded latch 5 is installed in the hole, and the magnetic joint 18 is installed at the position of the bottom plane data line hole 17; the wear-resistant block The anti-wear block pin hole 8 is installed on the anti-wear block pin hole 8, and the metal pin anti-wear cylinder 9 is installed with interference fit and special glue in the anti-wear block pin hole 8; the pressure sensor 19 is installed on the streamlined surface end of the anti-wear block 3 during the forming stage At a certain depth, the magnetic connector 18 is installed on its plane end, and the magnetic connector 18 and the pressure sensor 19 are connected with the data line 16; The positions cooperate with each other so that they can attract and communicate during normal work, and the collected data can be transmitted to the microcomputer 15 in real time. The storage battery 20 supplies power for the microcomputer 15 and the pressure sensor 19, and the magnetic joint 18 of the anti-wear block installation groove 4 can be used. Charge the storage battery 20; fix the anti-wear block 3 on the joint external component 2 through the plug 5, and then use a special adhesive to bond and reinforce the gap between the anti-wear block 3 and the joint external component 2.

The anti-wear block 3 is made of polyurethane elastomer material, and a pressure sensor 19 is installed inside it during the forming stage of the anti-wear block 3 .

The exposed part of the anti-wear block 3 is streamlined, the lower part is larger and the upper part is smaller, so as to reduce the drilling fluid impact and vortex-induced vibration.

The bolt 5 fixes the anti-wear block 3 on the mounting groove 4 of the anti-wear block.

The tail of the bolt 5 is welded with a spring, which can be pushed and loosened during installation, and the anti-wear block is covered with the joint for one week, with two layers up and down.

The wear-resistant block 3 has a metal bolt anti-wear cylinder 9 corresponding to the wear-resistant block latch hole 8, to prevent the wear-resistant block from being cut off by the latch when preventing the active force from being too large.

The data line 16 between the pressure sensor 19 and the microcomputer 15 is connected by a magnetic joint 18 at the wear-resistant block 3 and the wear-resistant block installation groove 4 .

A microcomputer 15, a motor 13, and a pressure sensor 19 are installed in the joint external component 2 to form an intelligent closed-loop control system, which can be started in time when the friction between the joint external component 2 and the inner wall of the riser is too large, resulting in no relative rotation between the joint external component 2 and the riser The motor 13 prevents damage to the device.

The electric motor 13 transmits the torque it generates to the internal assembly 1 of the joint through the starting gear 14 and the gear ring 12 .

As shown in Figures 1 to 5, the pin 5 is inserted into the metal pin wear-resistant cylinder 9 on the wear-resistant block 3, thereby fixing the wear-resistant block 3 on the joint body, and the gap between the wear-resistant block 3 and the joint body is further Bonded and reinforced with special adhesive. There is a spring at the end of the latch 5, which is easy to install. The external thread at one end of one drill pipe engages with the female thread 6 of the joint body, and the internal thread at one end of the other drill pipe engages with the male thread 7 of the joint body to connect the two drill pipes.

As shown in Figure 1, the anti-wear block 3 embedded in the joint body is a rectangular parallelepiped, and the installation is stable. The exposed part is streamlined, with the lower part being larger and the upper part being smaller, so as to reduce the impact of drilling fluid and vortex-induced vibration.

As shown in Figure 2, there is a metal pin wear-resistant cylinder 9 corresponding to the wear-resistant block pin hole 8 on the wear-resistant block 3, and the metal pin wear-resistant cylinder 9 is inserted in the wear-resistant block pin hole 8 on the wear-resistant block 3, Latch pin 5 cuts off wear block 3 when preventing active force from being too large.

As shown in Figure 4, the anti-wear block 3 is covered with joints for a week, and there are two layers up and down. There is an anti-wear block 3 every 20 degrees, and each layer has 18 upper and lower layers.

A method for using an anti-friction joint between a drill pipe and a water riser, comprising the following steps:

S1. Install the metal bolt anti-wear cylinder 9 into the anti-wear block pin hole 8 on the anti-wear block 3;

S2. Insert the spring end of the pin 5 into the pin hole 21 of the installation groove on the installation groove 4 of the wear-resistant block, compress the spring with a sheet tool, put it into the wear-resistant block 3, remove the sheet-shaped compression tool, and the latch 5 will automatically spring into the anti-wear block. In the installation slot pin hole 21 on the grinding block installation slot 4;

S3, inject special adhesive into the gap between the wear-resistant block 3 and the wear-resistant block installation groove 4, seal the gap, and strengthen the connection between the wear-resistant block 3 and the external component 2 of the joint;

S4. Engage the external thread at one end of one drill pipe with the female thread 6 of the joint internal component 1, and engage the internal thread at one end of the other drill pipe with the male thread 7 of the joint internal component 1 to connect the two drill pipes, install at the riser dogleg;

S5. During the working process, the inner wall of the riser and the external component 2 of the joint will generate a huge friction force, which will cause the relative rotation between the external component 2 of the joint and the riser to stop, and the anti-wear block 3 at the contact will bear huge stress; at this time, the anti-wear The pressure sensor 19 in the block 3 receives a larger pressure signal, converts it into an electrical signal, and transmits it to the microcomputer 15 through the data line 16; the microcomputer 15 sends an instruction to control the motor 13 to make it rotate in the opposite direction of the drill pipe rotation; the microcomputer 15 timely adjusts the torque output by the motor 13 according to the data fed back by the pressure sensor 19; the external assembly 2 of the joint and the riser re-rotate relative to each other, reducing the wear of several anti-wear blocks 3;

S6. When the anti-wear block 3 is worn out, take it out with the drill pipe, remove the worn anti-wear block 3, and replace it with a new anti-wear block 3 to continue to use.

Claims (9)

1. A method for using a wear-resistant joint between a drill pipe and a riser, characterized in that the joint includes an internal component of the joint (1), an external component of the joint (2), an anti-wear block (3), and an anti-wear Block installation groove (4), pin (5), female thread (6), male thread (7), pin hole of anti-wear block (8), anti-wear cylinder of metal pin (9), limit ring (10), limit Bit slot (11), gear ring (12), motor (13), starting gear (14), microcomputer (15), data line (16), data line hole (17), magnetic connector (18), pressure sensor (19), accumulator (20), mounting slot pin hole (21); the inner components of the joint (1) are respectively connected to two drill pipes through the threads on both sides, and the limit rings (10) at both ends of the joint are connected to the outside of the joint The limit groove (11) on the component (2) is matched, and each contact surface between the limit ring (10) and the limit groove (11) should be sealed with packing, filled with multi-layer carbon fiber and rubber, and axially fixed outside the joint assembly (2) and make the joint external assembly (2) rotate around the joint internal assembly (1); the side where the joint external assembly (2) cooperates with the joint internal assembly (1) is equipped with a microcomputer (15) and a motor (13) , the motor (13) and the starting gear (14) are connected by a key, and the starting gear (14) meshes with the closely connected and welded gear ring (12) with the internal components of the joint (1), and the oil bath is used for the joint Lubrication, lubricating oil immersion gear ring (12) top; Joint outer component (2) outside is provided with evenly distributed anti-wear block installation grooves (4); Two axial sides of anti-wear block installation grooves (4) are respectively installed two A mounting slot pin hole (21), a spring pin (5) is installed in the hole, a magnetic joint (18) is installed at the position of the bottom plane data line hole (17); an anti-wear block is installed on the anti-wear block (3) Pin hole (8), the anti-wear block pin hole (8) installs the metal pin anti-wear cylinder (9) with interference fit and special glue; pressure sensor (19) is installed on the At a certain depth of its streamlined surface end, the magnetic connector (18) is installed on its plane end, and the magnetic connector (18) and the pressure sensor (19) are connected with the data line (16); the magnetic connector ( 18) and the position of the magnetic joint (18) on the anti-wear block mounting groove (4) cooperate with each other, so that it can be attracted and connected in normal work, and the collected data can be transmitted to the microcomputer (15) and the storage battery (20) in real time. For the power supply of the microcomputer (15) and the pressure sensor (19), the battery (20) can be charged through the magnetic joint (18) of the anti-wear block mounting groove (4); the anti-wear block (3 ) is fixed on the joint external component (2), and the gap between the anti-wear block (3) and the joint external component (2) is bonded and reinforced with a special adhesive; It includes the following steps: S1. Install the metal bolt anti-wear cylinder (9) into the anti-wear block pin hole (8) on the anti-wear block (3); S2. Insert the spring end of the pin (5) into the pin hole (21) on the installation groove (4) of the anti-wear block, compress the spring with a sheet tool, put in the anti-wear block (3), and remove the sheet compression Tool, the latch (5) automatically springs into the installation groove latch hole (21) on the wear-resistant block installation groove (4); S3. Inject the special adhesive into the gap between the wear-resistant block (3) and the wear-resistant block installation groove (4), seal the gap, and strengthen the connection between the wear-resistant block (3) and the external component of the joint (2); S4. Engage the external thread at one end of one drill pipe with the female thread (6) of the internal assembly (1) of the joint, and engage the internal thread at one end of the other drill pipe with the male thread (7) of the internal assembly (1) of the joint, To connect two drill pipes, installed at the dog leg of the riser; S5. During the working process, the inner wall of the riser and the external component of the joint (2) will generate a huge friction force, which will cause the relative rotation between the external component of the joint (2) and the riser to stop, and the anti-wear block (3) at the contact point will bear a huge Stress; now the pressure sensor (19) in the wear-resistant block (3) receives a larger pressure signal, converts it into an electrical signal, and transmits it to the microcomputer (15) through the data line (16); the microcomputer (15 ) sends an instruction to control the motor (13) to make it rotate in the opposite direction of the drilling rod rotation direction; the microcomputer (15) adjusts the torque output by the motor (13) in good time according to the data fed back by the pressure sensor (19); the external components of the joint (2 ) and the water riser re-appear relative rotation, reducing the wear of several anti-wear blocks (3); S6. When the anti-wear block (3) is worn out, take it out with the drill pipe, remove the worn anti-wear block (3), and replace it with a new anti-wear block (3) to continue to use. 2. According to claim 1, a method for using a wear-resistant joint between a drill pipe and a riser is characterized in that: the wear-resistant block (3) is made of polyurethane elastomer material, and the wear-resistant block (3) Make forming stage and install pressure sensor (19) inside it. 3. A method for using a wear-resistant joint between a drill pipe and a riser according to claim 1, characterized in that: the exposed part of the wear-resistant block (3) is streamlined, the lower part is larger and the upper part is smaller, reducing the risk of drilling Liquid impact and vortex induced vibration. 4. A method for using the anti-wear joint between drill pipe and riser according to claim 1, characterized in that: the bolt (5) fixes the anti-wear block (3) in the anti-wear block installation groove ( 4) on. 5. A method for using a wear-resistant joint between a drill pipe and a riser according to claim 1, characterized in that: a spring is welded to the tail of the bolt (5), which can be pushed and loosened during installation to prevent wear. The blocks are covered with joints for a week, with upper and lower layers. 6. A method for using the anti-wear joint between drill pipe and riser according to claim 1, characterized in that: the anti-wear block (3) has a corresponding pin hole (8) on the anti-wear block The metal bolt anti-wear cylinder (9) prevents the bolt from cutting off the anti-wear block when the active force is too large. 7. A method for using the anti-wear joint between drill pipe and riser according to claim 1, characterized in that: the data line (16) between the pressure sensor (19) and the microcomputer (15) A magnetic joint (18) is used to connect the anti-wear block (3) and the anti-wear block installation groove (4). 8. A method for using the anti-wear joint between drill pipe and riser according to claim 1, characterized in that: a microcomputer (15) and a motor (13) are installed in the external assembly (2) of the joint An intelligent closed-loop control system is formed with the pressure sensor (19), and the motor (13) can be started in time to prevent damage to the device when there is no relative rotation between the external component of the joint (2) and the inner wall of the riser due to excessive friction between the external component of the joint (2) and the riser . 9. A method for using the anti-wear joint between drill pipe and riser according to claim 1, characterized in that: the motor (13) generates the Torque is transmitted to the internal assembly (1) of the joint.

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