A combined sealing structure with pressure compensation
A combined sealing and pressure compensation technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problem that the lip seal is difficult to meet the sealing surface sealing requirements, the packing seal is difficult to compensate radially, and it is difficult to achieve the sealing effect, etc. problem, to achieve the effect of enhancing endurance, increasing working life and reducing pressure difference
Active Publication Date: 2017-08-25
XI'AN PETROLEUM UNIVERSITY
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] Because it is difficult for the packing seal to achieve radial compensation when the sealing surface swings, and it wears faster near the gland; the lip seal is difficult to meet the sealing requirements when the pressure difference on both sides of the sealing surface changes irregularly, and the high temperature underground In the environment of high-pressure and high-abrasive drilling fluid, it is difficult to achieve a sealing effect
Therefore, packing seals and lip seals are difficult to meet the above-mentioned requirements for the sealing structure of rotary steerable drilling tools with controllable bend joints
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention is described in detail below in conjunction with accompanying drawing.
[0022] refer to figure 1 , a combined sealing structure with pressure compensation, suitable for fully rotary downhole rotary steerable drilling tools (controllable bending joints), including a connecting ring 3, which is fitted into the left end of the sealing sleeve 5 through interference fit, connected The right end of the ring 3 is welded to the left end of the metal sealing bellows 4, and the right end of the metal sealing bellows 4 is welded to the left end of the pressure cylinder liner 8; There is a one-way valve 7, the inside of the pressure cylinder liner 8 is interference fit with the piston 9, and the piston 9 is interference fit with the guide shaft 14 at the same time, the right end of the piston 9 is welded to the left end of the spring 10, and the right end of the spring 10 is welded to the spiral seal 12 at the left end face. The spiral seal 12 is sleeved on...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A combined sealing structure with pressure compensation is suitable for full-rotation downhole rotary steerable drilling tools. The connecting ring is inserted into the left end of the sealing sleeve through interference fit, and the right end of the connecting ring and the left end of the metal sealing bellows are welded together. The right end of the metal sealing bellows is welded to the left end of the pressure cylinder liner; the leftmost end of the pressure cylinder liner is provided with a safety valve, and the right side of the safety valve is provided with a one-way valve. Overfitting, the right end face of the piston is welded with the left end of the spring, the right end of the spring is welded at the left end face of the spiral seal, the spiral seal is sleeved on the guide shaft through interference fit, and the right end of the spiral seal is positioned by the spring retaining ring; connecting ring It mainly seals the drilling fluid and the internal lubricating oil entering from the guide shaft active space. The screw seal and the piston jointly seal the drilling fluid and internal lubricating oil entering from the gap at the screw seal structure, and the screw seal removes the drilling fluid in the drilling fluid. Solid particles; the invention has the characteristics of high temperature and high pressure resistance, corrosion resistance, impact resistance, wear resistance, high sealing performance, long life and the like.
Description
technical field [0001] The invention relates to a seal suitable for a full-rotation pointing rotary steerable drilling tool, in particular to a combined sealing structure with pressure compensation. Background technique [0002] The sealing of the steerable drilling tool is mainly to solve the sealing problem between the rotating casing or the non-rotating casing and the mandrel. The seals commonly used in rotary steerable drilling tools mainly include packing seals and lip seals. These two sealing forms are mainly realized by compressing the sealing material to produce large deformation, which is difficult to meet the controllable bend joint rotary steerable drilling tools in different drilling modes. The performance requirements for the sealing structure under harsh working conditions are mainly reflected in the following points: [0003] 1. The sealing surface has a swing angle within the design range, so the sealing structure needs to realize the seal while leaving an a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/52F16J15/28F16J15/54
Inventor 张光伟展茂雷刘英海田伟康刘畅
Owner XI'AN PETROLEUM UNIVERSITY