CN206038436U - Crooked tubular column fatigue test device - Google Patents

Abstract

The utility model provides a crooked tubular column fatigue test device mainly comprises base, left bearing base, axle year base, force sensor, right bearing base, motor base, elevating platform base, gear box, elevator motor, left side axle year pole, axle year regulator, right side axle year pole, left loader, left footstep bearing, left bearing frame, tubular column, movable bearing seat, portable beam, ball, right bearing frame, right loader, right footstep bearing, drive shaft and driving motor, left side bearing frame and right bearing frame are used for supporting the tubular column, and the movable bearing seat is used for controlling the bending of tubular column, and the drive motor drive drive shaft is used for controlling the tubular column rotational speed, and left side axle year pole, right side axle carry the axial pressure that pole, axle year regulator and force sensor are used for controlling the tubular column. Therefore, the utility model discloses the device can the fatigue characteristic of testing string under different axial pressure, different rotational speed and the different bending deformation condition.

Description

Fatigue test device for curved pipe string

technical field

The utility model relates to a mechanical device, in particular to a bending pipe column fatigue testing device for testing different axial forces, rotating speeds and bending deformations.

Background technique

In the exploration and development of oil and natural gas resources, the drill pipe is a bridge used to connect the wellhead power unit and the downhole dynamic drilling tool and circulate the drilling fluid. As the global demand for oil and gas resources continues to increase, the number of drilling wells continues to increase, and the number of deep and ultra-deep wells also continues to increase, resulting in an increasing demand for drill pipes. In order to make the drill pipe operate safely and prolong its life as much as possible, many scholars at home and abroad have carried out research work on the mechanical properties of the drill pipe.

The operating environment of the drill pipe in the well is very harsh, such as high temperature, high pressure, high sulfur content, etc., and it is also subjected to dynamic loads. The drill pipe alone is usually about 9.6 meters long, and a large number of drill pipes are threaded to form a drill string of thousands of notes. Taking a 5.5-inch drill pipe as an example, its outer diameter is 127 mm. For a 3,000-meter-deep well, the slenderness ratio of the drill string can reach more than 23,000. The huge slenderness ratio of the drill string makes its stiffness extremely small, so the drill string is prone to vibrations, such as lateral vibration, longitudinal vibration, torsional vibration, and complex vibrations coupled by these basic vibrations. Drill string vibration causes the drill string to bear uncertain dynamic loads, resulting in alternating stress, which is likely to cause fatigue fracture failure of the drill string. If a downhole accident occurs due to drill pipe breakage during the drilling process, the fish falling down the well can be salvaged through salvage operations, which will increase the drilling cost and delay the operation period. However, it may also occur that the fish falling down the well cannot be fished out, which may cause consequences such as well filling sidetracking or wellbore scrapping. Therefore, it is necessary to test the fatigue fracture performance of the drill string in drilling.

The existing devices for drill string fatigue testing are mainly aimed at vertical wells. However, there are more and more curved boreholes in current oil and gas drilling, such as highly deviated directional wells and horizontal wells. At the same time, the drill string also bears axial load and rotates at high speed during the working process. Therefore, how to obtain the fatigue characteristics of curved pipe strings under different rotational speeds and different axial loads through indoor testing methods has become the key to research.

Utility model content

The purpose of this utility model is: in order to overcome the above-mentioned difficulties, a kind of bending pipe string fatigue testing device is specially proposed to realize the fatigue characteristic test of the pipe string under different axial loads, different rotating speeds and different bending deformations.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a bending pipe column fatigue test device, mainly composed of a base, a left bearing base, an axle load base, a tension sensor, a right bearing base, a motor base, a lifting platform base, Gear box, lifting motor, left shaft load rod, shaft load regulator, right shaft load rod, left load carrier, left thrust bearing, left bearing seat, pipe column, movable bearing seat, movable beam, ball screw, right It consists of a bearing seat, a right carrier, a right thrust bearing, a drive shaft and a drive motor, and is characterized in that: the base is fixed on the ground, the left bearing base, the right bearing base and the motor base are fixed on the base, and the shaft load The base and the lifting platform base are connected with the base through T-shaped splines; the left bearing base is provided with a left bearing seat, the shaft bearing base is provided with a left carrier, the movable beam is provided with a movable bearing seat, and the right bearing base is There is a right bearing seat and a right carrier on the top, and a driving motor is arranged on the motor base; a left thrust bearing is arranged between the left carrier and the pipe column, a right thrust bearing is arranged between the right carrier and the pipe column, and a left thrust bearing is arranged between the left carrier and the pipe column. The bearing seat, the movable bearing seat and the right bearing seat are all equipped with radial bearings; the base of the lifting table is provided with a gear box, and the lifting motor drives the gears in the gear box to rotate, and the rotation of the gears makes the ball screw move and further Control the lifting of the movable crossbeam; the left shaft load rod passes through the left bearing base and the shaft load base, the left and right ends of the left shaft load rod are respectively connected to the tension sensor and the shaft load regulator, and the left and right ends of the right shaft load rod are respectively connected to A shaft load regulator and a right bearing base; a drive shaft is provided between the right end of the pipe string and the drive motor, and the rotation of the drive motor drives the drive shaft to rotate and further drives the pipe string to rotate.

The device for fatigue testing of a curved pipe string is characterized in that: the movable bearing seat can move in the vertical direction under the action of the ball screw and the movable beam, thereby controlling the bending of the pipe string; The base of the lifting table can slide longitudinally along the base to further control the bending deformation of the pipe string; the left shaft load rod, right shaft load rod, shaft load regulator and tension sensor are used to control the axial pressure of the pipe string, and drive the motor and the rotational speed of the drive shaft for the tubing string.

The above-mentioned bending pipe string fatigue testing device is characterized in that: the rotation speed of the driving motor can be adjusted by a frequency converter; the data of the tension sensor is measured by a signal acquisition system.

Compared with the prior art, the utility model has the following beneficial effects: (1) the structure of the device is simple and the operation is convenient; (2) the fatigue of the pipe string under different rotational speeds, different axial loads and different bending deformations can be realized Feature testing.

Description of drawings

Fig. 1 is a structural schematic diagram of a bending pipe string fatigue testing device according to the present invention.

In the figure: 1. Base, 2. Left bearing base, 3. Shaft load base, 4. Tension sensor, 5. Right bearing base, 6. Motor base, 7. Lifting table base, 8. Gear box, 9. Lifting Motor, 10. left shaft load rod, 11. shaft load regulator, 12. right shaft load rod, 13. left load carrier, 14. left thrust bearing, 15. left bearing seat, 16. pipe column, 17. can Moving bearing seat, 18. movable beam, 19. ball screw, 20. right bearing seat, 21. right carrier, 22. right thrust bearing, 23. driving shaft, 24. driving motor.

detailed description

As shown in Figure 1, a bending pipe string fatigue test device mainly consists of a base 1, a left bearing base 2, an axle load base 3, a tension sensor 4, a right bearing base 5, a motor base 6, a lifting platform base 7, a gear Box 8, Lifting Motor 9, Left Shaft Rod 10, Shaft Load Regulator 11, Right Shaft Rod 12, Left Loader 13, Left Thrust Bearing 14, Left Bearing Block 15, Pipe Column 16, Movable Bearing Block 17 , movable beam 18, ball screw 19, right bearing seat 20, right carrier 21, right thrust bearing 22, drive shaft 23 and drive motor 24, it is characterized in that: the base 1 is fixed on the ground, the left The bearing base 2, the right bearing base 5 and the motor base 6 are fixed on the base 1, and the shaft bearing base 3 and the lifting platform base 7 are connected with the base 1 through a T-shaped spline; the left bearing base 2 is provided with a left bearing Seat 15, the shaft bearing base 3 is provided with a left carrier 13, the movable beam 18 is provided with a movable bearing seat 17, the right bearing base 5 is provided with a right bearing seat 20 and a right carrier 21, and the motor base 6 is provided with A drive motor 24; a left thrust bearing 14 is provided between the left carrier 13 and the pipe column 16, a right thrust bearing 22 is provided between the right carrier 21 and the pipe column 16, a left bearing seat 15, a movable bearing seat 17 and the right bearing seat 20 are provided with radial bearings; the lifting platform base 7 is provided with a gear box 8, and the lifting motor 9 drives the gears in the gear box 8 to rotate, and the rotation of the gears makes the ball screw 19 move and further controls The lifting of the movable crossbeam 18; the left axle load rod 10 passes through the left bearing base 2 and the axle load base 3, the left and right ends of the left axle load rod 10 are respectively connected with the tension sensor 4 and the axle load regulator 11, and the right axle load rod The left and right ends of 12 are respectively connected to the shaft load regulator 11 and the right bearing base 5; a drive shaft 23 is provided between the right end of the pipe string 16 and the drive motor 24, and the rotation of the drive motor 24 drives the drive shaft 23 to rotate and further drives the pipe string 16 turns.

The above-mentioned bending pipe string fatigue test device is characterized in that: the movable bearing seat 17 can move along the vertical direction under the action of the ball screw 19 and the movable beam 18, thereby controlling the bending of the pipe string 16. Bending; the lifting platform base 7 can slide longitudinally along the base 1, thereby further controlling the bending deformation of the column 16; To control the axial pressure of the pipe string 16 , the drive motor 24 and the drive shaft 23 are used to control the rotational speed of the pipe string 16 .

The above-mentioned bending pipe string fatigue testing device is characterized in that: the rotation speed of the driving motor (24) can be adjusted by a frequency converter; the data of the tension sensor (4) is measured by a signal acquisition system.

The above-mentioned bending string fatigue test device can study operating parameters or systems such as rotational speed, weight on bit and bending shape by adjusting the driving motor (24), the shaft load regulator (11) and the movable bearing seat (17). The influence of parameters on the dynamic characteristics of the string (16).

Claims (2)

1. it is a kind of to bend tubing string fatigue test device, mainly by pedestal（1）, left bearing base（2）, axle carry base（3）, pulling force pass Sensor（4）, right bearing base（5）, motor base（6）, lifting platform base（7）, gear-box（8）, lifting motor（9）, left axle carry Bar（10）, axle carry actuator（11）, right axle carry bar（12）, left carrier（13）, left thrust bearing（14）, left shaft holder（15）、 Tubing string（16）, movable axis bearing（17）, moved cross beam（18）, ball-screw（19）, right axle bearing（20）, right carrier（21）、 Right thrust bearing（22）, drive shaft（23）And motor（24）Composition, it is characterised in that：The pedestal（1）It is fixed on ground On, left bearing base（2）, right bearing base（5）And motor base（6）It is fixed on pedestal（1）On, axle carries base（3）And lifting Platform base（7）With pedestal（1）By T-shaped spline connection；The left bearing base（2）It is provided with left shaft holder（15）, axle load bottom Seat（3）It is provided with left carrier（13）, moved cross beam（18）It is provided with movable axis bearing（17）, right bearing base（5）It is provided with Right axle bearing（20）With right carrier（21）, motor base（6）It is provided with motor（24）；The left carrier（13）With pipe Post（16）Between be provided with left thrust bearing（14）, right carrier（21）With tubing string（16）Between be provided with right thrust bearing（22）, left bearing Seat（15）, movable axis bearing（17）With right axle bearing（20）Journal bearing is equipped with inside；The lifting platform base（7）Tooth is provided with inside Roller box（8）, lifting motor（9）Drive gear-box（8）In pinion rotation, the rotation of gear makes ball-screw（19）Motion is gone forward side by side One step controls moved cross beam（18）Lifting；The left axle carries bar（10）Through left bearing base（2）Base is carried with axle（3）, it is left Axle carries bar（10）Left and right two ends connect pulling force sensor respectively（4）Actuator is carried with axle（11）, right axle load bar（12）Left and right Two ends difference connecting shaft carries actuator（11）With right bearing base（5）；The tubing string（16）Right-hand member and motor（24）Between set There is drive shaft（23）, motor（24）Rotation drive drive shaft（23）Rotate and be further driven to tubing string（16）Rotate.

2. one kind according to claim 1 bends tubing string fatigue test device, it is characterised in that：The movable axis bearing （17）In ball-screw（19）And moved cross beam（18）In the presence of can move along vertical, thus can control tubing string（16）'s Bending；The lifting platform base（7）Can be along pedestal（1）Longitudinal sliding motion, so that further control tubing string（16）Flexural deformation；Institute State left axle and carry bar（10）, right axle carry bar（12）, axle carry actuator（11）And pulling force sensor（4）For controlling tubing string（16）Axle To pressure, motor（24）And drive shaft（23）For tubulation post（16）Rotating speed.