High-pressure jet composite transmission assembly

Abstract

The utility model belongs to the technical field of drilling equipment, and particularly relates to a high-pressure jet composite transmission assembly. Comprising an anti-impact shaft sleeve, an upper TC composite sheet bearing static ring, an upper TC composite sheet bearing movable ring, a disc spring check ring, a disc spring gasket, an inner spacer bush, a composite thrust bearing static ring, a straight shell, a composite thrust bearing movable ring, a middle spacer bush, a disc spring (thick), a disc spring (thin), a pressure bearing sleeve, a spacer bush, a semi-ring, a lower TC composite sheet bearing static ring, a lower TC composite sheet bearing movable ring and a transmission shaft. The hard anti-impact cap is embedded into the overflowing hole in the end face of the shaft head of the transmission shaft, so that the end face of the shaft head of the high-pressure erosion transmission shaft can be effectively prevented from being eroded by fluid, the service life of the shaft body of the transmission shaft can be effectively prolonged, and the use frequency of the shaft body of the transmission shaft can be effectively increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drilling equipment, and particularly relates to a high-pressure jet composite transmission assembly. BACKGROUND

[0002] The screw rod drilling tool is a hydraulic machine, is an energy conversion device for converting pressure energy of liquid into mechanical energy, is also called a positive displacement motor (PDM), has the characteristics of low speed and large torque, is one of downhole drilling tools commonly used in current drilling engineering, and is the most widely used downhole power drilling tool.

[0003] In 2024, with the development of difficult drilling and difficult mining blocks in Shengli Oilfield, the blocks use conventional screw rod drilling tools + PDC drill bits to drill, and the footage is very slow. After experts of the difficult drilling project department analyze and study, it is proposed to use a new high-pressure jet 16-20Mpa drilling technology to cooperate with the screw rod drilling tool and the PDC drill bit to drill at high speed by using the high-pressure jet method. In the early stage, the high-pressure jet drilling technology test is carried out by using the conventional screw rod drilling tool to drill. After drilling for 50 hours, the conventional screw rod drilling tool is pulled out for inspection in March, and it is found that the TC bearing of the screw rod drilling tool is seriously eroded, which seriously affects the service life of the screw rod drilling tool. The TC bearing is seriously eroded and the piece is dropped, which can also cause the drill bit to be stuck downhole, cause abnormal conditions such as pump blocking and screw rod reverse buckling, and affect normal drilling construction. Figure 1 Therefore, the high-pressure jet drilling conventional screw rod drilling tool transmission assembly TC bearing is disassembled after being used for 50 hours, and it is found that the bearing has been eroded out of the groove. If it is continuously used, the risk of hard alloy piece falling off may occur. The difficult drilling project in Shengli urgently needs a screw rod drilling tool transmission shaft assembly that can adapt to high-pressure jet drilling to solve the current drilling bottleneck. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a high-pressure jet composite transmission assembly to solve the technical problems in the background art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a high-pressure jet composite transmission assembly, which comprises a collision-proof shaft sleeve, an upper TC composite piece bearing static ring, an upper TC composite piece bearing dynamic ring, a disc spring retainer ring, a disc spring gasket, an inner spacer sleeve, a composite thrust bearing static ring, a straight shell, a composite thrust bearing dynamic ring, a middle spacer sleeve, a disc spring (thick), a disc spring (thin), a pressure-bearing sleeve, a spacer sleeve, a half ring, a lower TC composite piece bearing static ring, a lower TC composite piece bearing dynamic ring, a transmission shaft, an outer steady flow static sleeve and an inner steady flow dynamic sleeve.

[0006] The upper TC composite bearing moving ring is fitted on the drive shaft, and the upper TC composite bearing stationary ring is fitted on and cooperates with the TC composite bearing moving ring. The inner stabilizing flow sleeve is installed on the drive shaft, and the outer stabilizing flow stationary sleeve is fitted outside the inner stabilizing flow sleeve and connected to the straight housing. Two inner spacers are provided in the middle of the drive shaft. Between the two inner spacers are a composite thrust bearing stationary ring, a composite thrust bearing moving ring, and a middle spacer. The disc spring retaining ring and the composite thrust bearing stationary ring are provided with disc spring washers, thick disc springs, and thin disc springs. The pressure-bearing sleeve and the semi-ring are arranged between the spacers and the drive shaft. The lower TC composite bearing stationary ring is connected to the straight housing, and the lower TC composite bearing moving ring is located between the drive shaft and the lower TC composite bearing stationary ring.

[0007] Preferably, the flow holes of the inner and outer flow stabilizers and the drive shaft are respectively equipped with inlaid hard alloy anti-impact sleeve structures.

[0008] Preferably, the upper and lower TC bearings adopt a diamond composite sheet structure.

[0009] Preferably, the thrust bearing assembly uses diamond composite sheets and a vibration damping structure.

[0010] Preferably, the inner hole of the outer flow stabilizer sleeve adopts a spline structure that is interlaced with the spline of the inner flow stabilizer sleeve.

[0011] Preferably, the semi-ring is cut from a ring-shaped part and placed on the upper part of the lower composite bearing stationary sleeve. An annular groove matching the shape of the inner hole of the semi-ring is machined on the drive shaft to fit the semi-ring between the spacer and the lower composite bearing stationary sleeve.

[0012] The beneficial effects of this utility model are: the hard anti-impact cap is embedded in the flow hole of the end face of the drive shaft, which can effectively prevent the end face of the drive shaft from being eroded by fluid under high pressure, and can effectively increase the service life and number of uses of the drive shaft body.

[0013] The upper end of the drive shaft adopts a new type of internal stabilizing static sleeve and external stabilizing flow sleeve with a flow stabilizing, flow limiting and anti-impact structure to prevent high pressure fluid from directly impacting the TC composite bearing, thereby further improving the service life of the drive shaft assembly.

[0014] The upper and lower TC bearings adopt a new diamond composite sheet structure. The hardness of the diamond composite sheet is 8-9 times that of conventional screw cemented carbide TC bearings, which effectively improves wear resistance and erosion resistance. It is the main component for lifting high-pressure jet screw drill tools.

[0015] The thrust bearing assembly adopts a new type of diamond composite sheet + vibration damping disc spring structure to avoid downhole squeaking, abnormal vibration, and damage to the composite sheet. The conventional alloy steel ball thrust bearing structure has been eliminated, and the overall transmission adopts a diamond composite sheet structure.

[0016] The high-pressure jet drilling condition of high pressure 14-20Mpa can be met.

[0017] The high-pressure jet composite transmission structure is compact, the bending point position is lowered, the build-up effect is good, and the tool face is convenient to control. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a part of the front view of the utility model;

[0019] Figure 2 is a part of the front view of the utility model;

[0020] Figure 3 is a structure diagram of the inner stable flow sleeve in the utility model;

[0021] Figure 4 is a perspective view of the upper TC composite sheet bearing moving ring in the utility model;

[0022] Figure 5 is a composite sheet cloth structure diagram in the utility model;

[0023] Figure 6 is a structure diagram of the composite thrust bearing in the utility model. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the utility model creation and the features in the embodiments can be combined with each other without conflict.

[0025] In the description of the utility model creation, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model creation and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model creation. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model creation, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixed connection," and "fixed connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0028] like Figures 1-6 As shown, a high-pressure injection composite transmission assembly includes an anti-impact bushing 1, an upper TC composite bearing stationary ring 2, an upper TC composite bearing moving ring 3, a disc spring retaining ring 4, a disc spring washer 5, an inner spacer 6, a composite thrust bearing stationary ring 7, a straight housing 8, a composite thrust bearing moving ring 9, a middle spacer 10, a thick disc spring 11, a thin disc spring 12, a pressure-bearing sleeve 13, a spacer 14, a semi-ring 15, a lower TC composite bearing stationary ring 16, a lower TC composite bearing moving ring 17, a transmission shaft 18, an outer flow-stabilizing stationary sleeve 19, and an inner flow-stabilizing sleeve 10.

[0029] The upper TC composite bearing moving ring is fitted on the drive shaft, and the upper TC composite bearing stationary ring is fitted on and cooperates with the TC composite bearing moving ring. The inner stabilizing flow sleeve is installed on the drive shaft, and the outer stabilizing flow stationary sleeve is fitted outside the inner stabilizing flow sleeve and connected to the straight housing. Two inner spacers are provided in the middle of the drive shaft. Between the two inner spacers are a composite thrust bearing stationary ring, a composite thrust bearing moving ring, and a middle spacer. The disc spring retaining ring and the composite thrust bearing stationary ring are provided with disc spring washers, thick disc springs, and thin disc springs. The pressure-bearing sleeve and the semi-ring are arranged between the spacers and the drive shaft. The lower TC composite bearing stationary ring is connected to the straight housing, and the lower TC composite bearing moving ring is located between the drive shaft and the lower TC composite bearing stationary ring.

[0030] The upper end of the drive shaft is enhanced with an inner and outer flow stabilizing sleeve and a drive shaft flow passage hole, which are inlaid with a hard alloy anti-impact sleeve structure. The upper and lower TC bearings adopt a diamond composite sheet structure, and the thrust bearing assembly adopts a diamond composite sheet + vibration damping structure. The inner hole of the outer flow stabilizing sleeve adopts a spline structure that is interlaced with the spline of the inner flow stabilizing sleeve, generating turbulence, flow stabilization, and flow restriction effects to prevent high-pressure liquid from directly impacting the TC composite sheet bearing. The semi-ring is cut from a ring-shaped part and set on the upper part of the lower composite bearing stationary sleeve. An annular groove matching the shape of the inner hole of the semi-ring is machined on the drive shaft to lock the semi-ring between the spacer and the lower composite bearing stationary sleeve. In the event of breakage above the annular groove of the drive shaft body, it plays a role in preventing detachment and falling off, thus avoiding downhole accidents.

[0031] The lower TC composite bearing static sleeve and the lower TC composite bearing dynamic sleeve are made of the grinding inner and outer diameters and the end face inlaying diamond composite pieces, the older design of the lower TC bearing group, the wear resistance and the anti-washing are enhanced by more than 3 times, and the service life of the bearing group is effectively improved.

[0032] The second "O" shaped sealing ring B2 is installed in the lower TC composite bearing dynamic ring 17, the third "O" shaped sealing ring B3 is installed in the lower TC composite bearing static ring 16, the first "O" shaped sealing ring B1 is installed in the upper TC composite bearing static ring 2, the fourth "O" shaped sealing ring B4 is installed on the outer steady flow static sleeve 19, the lower TC composite bearing dynamic ring 17 is connected with the transmission shaft 18, the lower TC composite bearing static ring 16 is installed in the lower TC composite bearing dynamic ring 17, the half ring 15 is installed on the transmission shaft 18, the pressure bearing sleeve 13 is installed on the transmission shaft 18 and is sleeved in the half ring 15, the partition sleeve 14 is installed in the transmission shaft 18, the disc spring retainer ring 4 is installed in the transmission shaft 18, the inner partition sleeve 6 is installed in the transmission shaft 18, the thin disc type spring 12 is installed in the transmission shaft 18, the thick disc type spring 11 is installed in the transmission shaft 18, the composite thrust bearing static ring 7 is installed in the transmission shaft 18, the composite thrust bearing dynamic ring 9 is installed in the transmission shaft 18, the middle partition sleeve 10 is installed in the transmission shaft 18, the composite thrust bearing dynamic ring 9 is installed in the transmission shaft 18, the second inner partition sleeve 6 is installed in the transmission shaft 18, the composite thrust bearing static ring 7 is installed in the transmission shaft 18, the thin disc type spring 12 is installed in the transmission shaft 18, the thick disc type spring 11 is installed in the transmission shaft 18, the second disc spring retainer ring 4 is installed in the transmission shaft 18, the upper TC composite bearing dynamic ring 3 is installed in the transmission shaft 18, the upper TC composite bearing static ring 2 is installed in the transmission shaft 18, the straight shell 8 is installed in the transmission shaft 18 and is connected with the lower TC composite bearing static ring 16, the outer steady flow static sleeve 19 is installed in the hole of the straight shell 8, the inner steady flow dynamic sleeve 20 is installed in the transmission shaft 18, the anti-impact shaft sleeve 1 is installed in the transmission bearing 18, and thus all the components are installed.

[0033] Working principle: when the high-pressure drilling fluid of the mud pump enters from the motor inlet, the rotor starts to rotate and outputs the rotating speed and torque to the universal shaft, the universal shaft transmits the rotating speed and torque to the transmission shaft and the drill bit; the high-pressure drilling fluid flows out of the motor outlet, directly hits the gap between the outer steady flow static sleeve and the inner steady flow dynamic sleeve after passing through the universal shaft, the inner steady flow dynamic sleeve starts to rotate with the transmission shaft, and the steady flow forms a resistance flow, a disturbance flow and a flow limiting function, 8%-10% of the mud enters the composite transmission assembly for cooling and lubrication of the composite bearing and the thrust bearing, and the other mud enters the water cap from the transmission shaft hole and flows into the drill bit; the upper and lower TC composite bearings provide radial righting and stable rotation of the transmission shaft after the transmission bearing rotates; the composite thrust bearing and the disc spring bear the drilling pressure and the counteracting force of the drill bit, at the same time, absorb the axial vibration generated by rock breaking of the drill bit, and protect the service life of the composite thrust bearing composite piece.

[0034] The utility model discloses through fluid mechanics optimization, the upper and lower TC bearing adopts new type diamond composite sheet structure, thrust bearing adopts new type diamond composite sheet + damping structure, transmission shaft overflow hole increases hard alloy anti -impact cover. Make this tool when working simultaneously has: high pressure jet -flow, steady flow, current -limiting, high wear -resisting, damping and so on, can be used in high pressure injection drilling, rotary steering drilling, high -speed screw drilling and so on drilling environment.

[0035] It should be noted that, for those skilled in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, which should also be considered within the scope of the utility model.

Claims

1. A high pressure jet composite drive assembly characterized by: The anti-impact shaft sleeve, the upper TC composite bearing static ring, the upper TC composite bearing dynamic ring, the disc spring retainer ring, the disc spring gasket, the inner spacer sleeve, the composite thrust bearing static ring, the straight shell, the composite thrust bearing dynamic ring, the middle spacer sleeve, the thick disc spring, the thin disc spring, the pressure bearing sleeve, the spacer sleeve, the half ring, the lower TC composite bearing static ring, the lower TC composite bearing dynamic ring, the transmission shaft, the outer steady flow static sleeve and the inner steady flow dynamic sleeve are included. The upper TC composite bearing dynamic ring is sleeved on the transmission shaft, the upper TC composite bearing static ring is sleeved on the TC composite bearing dynamic ring and matched with the TC composite bearing dynamic ring, the inner steady flow dynamic sleeve is installed on the transmission shaft, the outer steady flow static sleeve is sleeved outside the inner steady flow dynamic sleeve and connected with the straight shell, the middle part of the transmission shaft is provided with two inner spacer sleeves, the composite thrust bearing static ring, the composite thrust bearing dynamic ring and the middle spacer sleeve are arranged between the two inner spacer sleeves, the disc spring retainer ring and the composite thrust bearing static ring are provided with the disc spring gasket, the thick disc spring and the thin disc spring, the pressure bearing sleeve and the half ring are arranged between the spacer sleeve and the transmission shaft, the lower TC composite bearing static ring is connected with the straight shell, and the lower TC composite bearing dynamic ring is located between the transmission shaft and the lower TC composite bearing static ring.

2. The high pressure jet composite drive assembly of claim 1, wherein: The overflow holes of the inner and outer steady flow sleeves and the transmission shaft are respectively provided with the inlaid hard alloy anti-impact sleeve structure.

3. The high pressure jet composite drive assembly of claim 1, wherein: The upper and lower TC bearings are provided with the diamond composite sheet structure.

4. The high pressure jet composite drive assembly of claim 1, wherein: The thrust bearing group is provided with the diamond composite sheet and the damping structure.

5. The high pressure jet composite drive assembly of claim 1, wherein: The inner hole of the outer steady flow sleeve is provided with the spline structure and the inner steady flow sleeve spline is staggered.

6. The high pressure jet composite drive assembly of claim 1, wherein: The half ring is cut from a ring-shaped part and arranged on the upper part of the lower composite bearing static sleeve, a ring-shaped groove which is consistent with the shape of the inner hole of the half ring is machined on the transmission shaft, and the half ring is clamped between the spacer sleeve and the lower composite bearing static sleeve.

Images