High-pressure jet composite transmission assembly

Abstract

The invention belongs to the technical field of drilling equipment, and particularly relates to a high-pressure injection 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, 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 a 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 invention belongs to the technical field of drilling equipment, and in particular relates to a high-pressure jet composite transmission assembly. Background Art

[0002] The screw drill bit is a hydraulic machine, an energy conversion device that converts the pressure energy of the liquid into mechanical energy, also known as a positive displacement motor (PDM). It has the characteristics of low speed and high torque. It is one of the commonly used downhole drilling tools in drilling projects and the most widely used downhole power drilling tool.

[0003] In 2024, with the development of difficult-to-drill and difficult-to-mine blocks in Shengli Oilfield, the block was drilled using conventional screw drill tools + PDC drill bits, and the footage was very slow. After discussion and analysis by experts from the Difficult Drilling Project Department, it was proposed to use a new high-pressure jet 16-20Mpa drilling process in conjunction with screw drill tools and PDC drill bits for high-pressure jet speed-up drilling. In the early high-pressure jet drilling process test, conventional screw drill tools were used for drilling. In March, after the conventional screw drill tools were inspected after 50 hours of drilling, it was found that the carbide TC bearings of the screw drill tools were severely eroded, which seriously affected the service life of the entire screw drill tool. The TC bearings were severely eroded and fell off, which would also cause the drill bit to get stuck underground, and would cause abnormal conditions such as pump blocking and screw backlash underground, affecting the normal drilling construction. Figure 1 For this reason, the picture shows the TC bearing of the conventional screw drill transmission assembly for high-pressure jet drilling. After 50 hours of use, it was disassembled and found that the bearing had been flushed out of the groove. If it continues to be used, there may be a risk of carbide sheets falling off. The Shengli Nandong project is in urgent need of a screw drill transmission shaft assembly that can adapt to high-pressure jet drilling to solve the current drilling bottleneck. Summary of the invention

[0004] The purpose of the present invention is to provide a high-pressure injection compound transmission assembly to solve the technical problems existing in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-pressure jet composite transmission assembly, including an anti-collision sleeve, an upper TC composite sheet bearing static ring, an upper TC composite sheet bearing dynamic ring, a disc spring retaining ring, a disc spring gasket, an inner spacer sleeve, a composite thrust bearing static ring, a straight housing, a composite thrust bearing dynamic ring, a middle spacer sleeve, a disc spring (thick), a disc spring (thin), a pressure sleeve, a spacer sleeve, a half ring, a lower TC composite sheet bearing static ring, a lower TC composite sheet bearing dynamic ring, a transmission shaft, an outer flow stabilizing static sleeve and an inner flow stabilizing sleeve;

[0006] The upper TC composite sheet bearing moving ring is sleeved on the transmission shaft, the upper TC composite sheet bearing static ring is sleeved on the TC composite sheet bearing moving ring and cooperates with it, the inner stabilizing flow sleeve is installed on the transmission shaft, the outer stabilizing flow static sleeve is sleeved on the outside of the inner stabilizing flow sleeve and is connected to the straight housing, two inner spacer sleeves are provided in the middle of the transmission shaft, a composite thrust bearing static ring, a composite thrust bearing moving ring and a middle spacer sleeve are provided between the two inner spacer sleeves, the disc spring retaining ring and the composite thrust bearing static ring are provided with disc spring gaskets, thick disc springs and thin disc springs, the pressure sleeve and the half ring are arranged between the spacer sleeve and the transmission shaft, the lower TC composite sheet bearing static ring is connected to the straight housing, and the lower TC composite sheet bearing moving ring is located between the transmission shaft and the lower TC composite sheet bearing static ring.

[0007] Preferably, the inner and outer flow-stabilizing sleeves and the flow holes of the transmission shaft are respectively inlaid with 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 group adopts a diamond composite sheet and a vibration reduction structure.

[0010] Preferably, the inner hole of the outer stabilizer sleeve adopts a spline structure which is staggered with the splines of the inner stabilizer sleeve.

[0011] Preferably, the semi-ring is cut from an annular part and arranged on the upper part of the static sleeve of the lower composite bearing. An annular groove matching the shape of the inner hole of the semi-ring is machined on the transmission shaft, and the semi-ring is clamped between the spacer and the static sleeve of the lower composite bearing.

[0012] The beneficial effects of the present invention are as follows: the present invention adopts a hard anti-impact cap embedded in the flow hole on the end face of the transmission shaft head, which can effectively prevent the end face of the transmission shaft head from being eroded by fluid due to high pressure erosion, and can effectively increase the service life and number of uses of the transmission shaft body;

[0013] The upper end of the transmission shaft adopts a new flow-stabilizing static sleeve and an outer flow-stabilizing flow sleeve with a flow-stabilizing, flow-limiting and anti-impact structure to prevent high-pressure fluid from directly rushing into the TC composite sheet bearing, further improving the life of the transmission 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 carbide TC bearings. The wear resistance and erosion resistance are effectively improved. It is the main component for the lifting of high-pressure jet screw drilling tools.

[0015] The thrust bearing group adopts a new diamond composite plate + vibration damping disc spring structure to avoid the occurrence of holding and abnormal vibration in the well, which may cause damage to the composite plate. The conventional alloy steel ball thrust bearing structure is removed, and the overall transmission adopts a diamond composite plate structure.

[0016] It can meet the high-pressure jet drilling conditions of 14-20Mpa.

[0017] The high-pressure jet compound transmission has a compact structure, a lowered bending point, a good deflection effect, and an easy-to-control tool surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front view of a portion of the present invention;

[0019] Figure 2 A front view of another part of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the internal stabilization flow sleeve in the present invention;

[0021] Figure 4 It is a three-dimensional diagram of the moving ring of the upper TC composite sheet bearing in the present invention;

[0022] Figure 5 This is a structural diagram of the composite sheet fabric in the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the composite thrust bearing in this flip side. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fixed connection" and "fixed connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0027] The specific implementation of the present invention is described in detail below with reference to the preferred embodiments of the accompanying drawings.

[0028] like Figure 1-6 As shown, a high-pressure injection composite transmission assembly includes an anti-collision sleeve 1, an upper TC composite sheet bearing static ring 2, an upper TC composite sheet bearing dynamic ring 3, a disc spring retaining ring 4, a disc spring gasket 5, an inner spacer sleeve 6, a composite thrust bearing static ring 7, a straight housing 8, a composite thrust bearing dynamic ring 9, a middle spacer sleeve 10, a thick disc spring 11, a thin disc spring 12, a pressure sleeve 13, a spacer sleeve 14, a half ring 15, a lower TC composite sheet bearing static ring 16, a lower TC composite sheet bearing dynamic ring 17, a transmission shaft 18, an outer flow stabilizing static sleeve 19 and an inner flow stabilizing sleeve 10;

[0029] The upper TC composite sheet bearing moving ring is sleeved on the transmission shaft, the upper TC composite sheet bearing static ring is sleeved on the TC composite sheet bearing moving ring and cooperates with it, the inner stabilizing flow sleeve is installed on the transmission shaft, the outer stabilizing flow static sleeve is sleeved on the outside of the inner stabilizing flow sleeve and is connected to the straight housing, two inner spacer sleeves are provided in the middle of the transmission shaft, a composite thrust bearing static ring, a composite thrust bearing moving ring and a middle spacer sleeve are provided between the two inner spacer sleeves, the disc spring retaining ring and the composite thrust bearing static ring are provided with disc spring gaskets, thick disc springs and thin disc springs, the pressure sleeve and the half ring are arranged between the spacer sleeve and the transmission shaft, the lower TC composite sheet bearing static ring is connected to the straight housing, and the lower TC composite sheet bearing moving ring is located between the transmission shaft and the lower TC composite sheet bearing static ring.

[0030] The upper end of the transmission shaft is increased, and the inner and outer flow-stabilizing sleeves and the flow holes of the transmission shaft adopt an inlaid hard alloy anti-impact sleeve structure, the upper and lower TC bearings adopt a diamond composite sheet structure, and the thrust bearing group adopts a diamond composite sheet + vibration reduction structure. The inner hole of the outer flow-stabilizing sleeve adopts a spline structure that is staggered with the splines of the inner flow-stabilizing sleeve to produce turbulent, stabilizing and limiting flow effects to prevent high-pressure liquid from directly rushing into the TC composite sheet bearing. The half ring is cut from an annular part and arranged on the upper part of the lower composite bearing static sleeve. An annular groove that matches 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 and the lower composite bearing static sleeve. When the transmission shaft body is broken above the annular groove, it plays a role in preventing it from falling off and falling off, thereby avoiding underground accidents.

[0031] The lower TC composite piece bearing static sleeve and the lower TC composite piece bearing dynamic sleeve are made of running-in inner and outer diameters and end faces inlaid with diamond composite pieces. The wear resistance and erosion resistance of the older design lower TC bearing group are enhanced by more than 3 times, effectively improving the service life of the bearing group.

[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 flow stabilizing static sleeve 19; the lower TC composite bearing dynamic ring 17 is connected to 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 sleeve 13 is installed on the transmission shaft 18 and is sleeved in the half ring 15; the spacer sleeve 14 is installed in the transmission shaft 18; the disc spring retaining ring 4 is installed in the transmission shaft 18; the inner spacer sleeve 6 is installed in the transmission shaft 18; the thin disc spring 12 is installed in the transmission shaft 18; the thick disc spring 11 is installed in the transmission shaft 18; the static ring 7 of the composite thrust bearing is installed The composite thrust bearing moving ring 9 is installed in the transmission shaft 18; the middle spacer sleeve 10 is installed in the transmission shaft 18; the composite thrust bearing moving ring 9 is installed in the transmission shaft 18; the second piece of the inner spacer sleeve 6 is installed in the transmission shaft 18 again; the composite thrust bearing static ring 7 is installed in the transmission shaft 18; the thin disc spring 12 is installed in the transmission shaft 18; the thick disc spring 11 is installed in the transmission shaft 18; the second piece of the disc spring retaining ring 4 is installed in the transmission shaft 18 again; the upper TC composite piece bearing moving ring 3 is installed in the transmission shaft 18; the upper TC composite piece bearing static ring 2 is installed in the transmission shaft 18; the straight housing 8 is installed in the transmission shaft 18 and connected with the lower TC composite piece bearing static ring 16; the outer stabilizing flow static sleeve 19 is installed in the inner hole of the straight housing 8; the inner stabilizing flow sleeve 20 is installed in the transmission shaft 18; the anti-collision sleeve 1 is installed in the transmission bearing 18, and now 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 transmits the output speed and torque to the universal shaft, and the universal shaft transmits the speed and torque to the transmission shaft and the drill bit; the high-pressure drilling fluid flows out of the motor outlet and directly rushes into the matching gap between the outer flow-stabilizing static sleeve and the inner flow-stabilizing sleeve after passing through the universal shaft. The inner flow-stabilizing sleeve starts to rotate with the transmission shaft, forming flow blocking, flow turbulence and flow limiting functions in the steady flow. 8%-10% of the mud enters the composite transmission assembly for cooling and lubrication of the composite piece bearing and the thrust bearing, and the rest of the mud enters the water cap and is discharged from the shaft hole of the transmission shaft to flow into the drill bit; the upper and lower TC composite piece bearings provide radial straightening after the transmission bearing rotates to stabilize the rotation of the transmission shaft; the composite thrust bearing and the disc spring withstand the drilling pressure and the reverse thrust force of the drill bit, and at the same time, absorb the axial vibration caused by the drill bit breaking the rock to protect the service life of the composite piece thrust bearing and the composite piece.

[0034] The present invention optimizes fluid mechanics, adopts a new diamond composite sheet structure for the upper and lower TC bearings, adopts a new diamond composite sheet + vibration reduction structure for the thrust bearing, and adds a hard alloy anti-impact sleeve to the flow hole of the transmission shaft. This enables the tool to have the following functions when working: high-pressure jet resistance, steady flow, current limiting, high wear resistance, vibration reduction, etc., and can be used in drilling environments such as high-pressure jet drilling, rotary steerable drilling, and high-speed screw drilling.

[0035] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A high-pressure injection compound transmission assembly, characterized in that: Including anti-impact sleeve, upper TC composite sheet bearing static ring, upper TC composite sheet bearing dynamic ring, disc spring retaining ring, disc spring gasket, inner spacer sleeve, composite thrust bearing static ring, straight housing, composite thrust bearing dynamic ring, middle spacer sleeve, disc spring (thick), disc spring (thin), pressure sleeve, spacer sleeve, half ring, lower TC composite sheet bearing static ring, lower TC composite sheet bearing dynamic ring, transmission shaft, outer flow stabilizing static sleeve and inner flow stabilizing sleeve; The upper TC composite sheet bearing moving ring is sleeved on the transmission shaft, the upper TC composite sheet bearing static ring is sleeved on the TC composite sheet bearing moving ring and cooperates with it, the inner stabilizing flow sleeve is installed on the transmission shaft, the outer stabilizing flow static sleeve is sleeved on the outside of the inner stabilizing flow sleeve and is connected to the straight housing, two inner spacer sleeves are provided in the middle of the transmission shaft, a composite thrust bearing static ring, a composite thrust bearing moving ring and a middle spacer sleeve are provided between the two inner spacer sleeves, the disc spring retaining ring and the composite thrust bearing static ring are provided with disc spring gaskets, thick disc springs and thin disc springs, the pressure sleeve and the half ring are arranged between the spacer sleeve and the transmission shaft, the lower TC composite sheet bearing static ring is connected to the straight housing, and the lower TC composite sheet bearing moving ring is located between the transmission shaft and the lower TC composite sheet bearing static ring.

2. The high-pressure injection compound transmission assembly according to claim 1, characterized in that: The inner and outer flow-stabilizing sleeves and the flow holes of the transmission shaft are respectively inlaid with hard alloy anti-impact sleeve structures.

3. The high-pressure injection compound transmission assembly according to claim 1, characterized in that: The upper and lower TC bearings adopt a diamond composite sheet structure.

4. The high-pressure injection compound transmission assembly according to claim 1, characterized in that: The thrust bearing group adopts a diamond composite sheet and a vibration reduction structure.

5. The high-pressure injection compound transmission assembly according to claim 1, characterized in that: The inner hole of the outer flow stabilizer sleeve adopts a spline structure which is staggered with the splines of the inner flow stabilizer sleeve.

6. The high-pressure injection compound transmission assembly according to claim 1, characterized in that: The semi-ring is cut from an annular part and arranged on the upper part of the static sleeve of the lower composite bearing. An annular groove matching the shape of the inner hole of the semi-ring is machined on the transmission shaft, and the semi-ring is clamped between the spacer and the static sleeve of the lower composite bearing.

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