CN201460762U

CN201460762U - Full-hydraulic two-way drill string shock absorber

Info

Publication number: CN201460762U
Application number: CN2009201284715U
Authority: CN
Inventors: 潘大东; 罗明轩
Original assignee: CHONGQING WANGJIANG XINQI MACHINERY Co Ltd; Chongqing Wangjiang Industry Co Ltd
Current assignee: CHONGQING WANGJIANG XINQI MACHINERY Co Ltd; Chongqing Wangjiang Industry Co Ltd
Priority date: 2009-08-14
Filing date: 2009-08-14
Publication date: 2010-05-12
Anticipated expiration: 2019-08-14

Abstract

The utility model relates to a full-hydraulic two-way drill string shock absorber comprising a mandrel, a centering sleeve, a piston, a washing pipe, a lower joint, a spline body and an oil cylinder arranged between the lower part of the spline body and the upper part of the lower joint, and the spline body can slide up and down along the piton. The shock absorber is characterized in that compressible 201-100 dimethyl silicone oil is filled in the oil cylinder; a first sealing assembly is arranged between the centering sleeve and the mandrel; and second sealing assemblies are arranged between the oil cylinder and the mandrel and between the lower joint and the mandrel. The shock absorber utilizes the compressible liquid to produce compressive deformation and gap flowing through the spline at high speed under pressure for absorbing the vibration energy of a drill bit and a drill string, therefore the shock absorber has better effect of reducing vibration and impact load of a drilling tool.

Description

All-hydraulic two-way drill-string shock absorbers

Technical field

The utility model relates to damper, is specifically related to a kind of all-hydraulic two-way drill-string shock absorbers.

Background technology

At present, domestic oil field damper commonly used generally adopts hydraulic spring grease cup formula or air spring type, and mostly is unidirectional damping.Its shortcoming of hydraulic spring grease cup formula and air spring type is: in the manufacturing to its metal material, machining accuracy and heat treated having relatively high expectations thereof; Time in down-hole hot environment one-time continuous work is shorter, and damping mechanism damages easily, poor reliability, and damping effect is undesirable.The drill-string shock absorbers damping direction that has has only axially, and the damping in radial direction does not also have to drill string.

Summary of the invention

The purpose of this utility model provides a kind of all-hydraulic two-way drill-string shock absorbers, and it can absorb the harmful vibrations between drill bit and drill string in the Process of Oil Well Drilling, good damping effect, and the reliability height can be protected drill bit effectively and improve rate of penetration.

The utility model is by the compressible dimethicone in the compression shock absorption device oil pocket, and the harmful vibrations in the absorption Process of Oil Well Drilling between drill bit and drill string are to protect drill bit and to improve rate of penetration.Externally under the effect of pressure, dimethicone in the oil cylinder is compressed form a liquid spring to slow down harmful vibrations between drill bit and drill string.Externally under the effect of torsion, rotary torsion is converted to axial compression,, absorbs in the Process of Oil Well Drilling harmful vibrations radially between drill bit and drill string by the compressible dimethicone in the compression shock absorption device oil pocket by nine head threads.Externally under the effect of pressure, the damping action that makes the interior dimethicone high velocity stream of spline body cross the slit generation between spline absorbs the energy that shakes between drill bit and drill string.

All-hydraulic two-way drill-string shock absorbers described in the utility model, comprise axle, what cooperate with the middle and upper part of axle sets upright sleeve, the piston that is connected with the middle part of axle, the washing pipe that is connected with the bottom of axle, the lower contact that is connected with the bottom of washing pipe, top cooperates with the bottom of setting upright sleeve and spline body that the middle part cooperates with axle, be located at the oil cylinder between spline body bottom and the lower contact top, the spline body can along on the piston/lower slider, it is characterized in that: in oil cylinder, fill with the 201-100 dimethicone that can compress, be configured for the liquid spring of damping; Be provided with first black box between sleeve and the axle setting upright; Be provided with second black box between oil cylinder and the axle and between lower contact and the axle.

Described all-hydraulic two-way drill-string shock absorbers, comprise that also the retaining ring, locking key, the locking screw that are located between axle and the spline body emit, be located at " O " shape back-up ring of oil cylinder and spline body matching part, be located at the Y3 RunddichtringO and the BA RunddichtringO of oil cylinder and piston matching part.

Described all-hydraulic two-way drill-string shock absorbers, its described first black box is established and is set upright between sleeve and the axle, comprises that the dust ring, three of the matching part that is located at the upper oral part of setting upright sleeve and axle is opened watt (a kind of sliding bearing) and " V " RunddichtringO.

Described all-hydraulic two-way drill-string shock absorbers, its described second black box comprises packing ring, supporting base, first seal receptacle and second seal receptacle that is located at oil cylinder and washing pipe matching part.

The top of this damper is the torque transfer part branch, and the transmission of moment of torsion is undertaken by piston, spline body.The bottom then is a hydraulic chamber, and the oil cylinder the inside is filled with compressible 201-100 dimethicone and constituted a liquid spring that is used for damping.

The beneficial effects of the utility model: because the shaft bottom is uneven and the design feature of rock bit, drill bit and drill string produce nuisance vibration in drilling process, hydraulic shock absorber is exactly to utilize compressible liquid to produce the slit that compressive strain and high velocity stream cross between spline under pressure to absorb the energy of drill bit and drill string vibration, thereby this damper is had slow down the good result of drilling tool vibrations and shock loading.

Description of drawings

Fig. 1 is the structural representation of the utility model epimere.

Fig. 2 is the structural representation of the utility model hypomere.

Fig. 3 is the A-A section enlarged diagram of Fig. 1.

Fig. 4 is the B portion enlarged diagram of Fig. 1.

Fig. 5 is the C portion enlarged diagram of Fig. 1.

Fig. 6 is the D portion enlarged diagram of Fig. 2.

Fig. 7 is the E portion enlarged diagram of Fig. 2.

Fig. 8 is the structural representation of spline body (internal spline tube).

The specific embodiment

Referring to Fig. 1 to Fig. 8, all-hydraulic two-way drill-string shock absorbers described in the utility model, comprise cooperate with the middle and upper part of axle 1 set upright sleeve 4, the piston 11 that is connected with the middle part of axle, the washing pipe 16 that is connected with the bottom of axle, the lower contact 21 that is connected with the bottom of washing pipe, top cooperates with the bottom of setting upright sleeve and spline body 7 that the middle part cooperates with axle, be located at the oil cylinder 15 between spline body bottom and the lower contact top, the spline body can along on the piston/lower slider, the lower surface restriction that sliding distance is emitted by the upper surface and the locking screw of spline body, piston can rotate up and down around axle by nine head threads on the axle; In oil cylinder 15, fill with the 201-100 dimethicone that can compress, be configured for the liquid spring of damping; Comprise that also the retaining ring 8, locking key 9, the locking screw that are located between axle 1 and the spline body 7 emit 10, be located at " O " shape back-up ring 12 of oil cylinder and spline body matching part, be located at the Y3 RunddichtringO 13 and the BA RunddichtringO 14 of oil cylinder and piston matching part;

Be provided with first black box setting upright between sleeve 4 and the axle 1, first black box is established and is set upright between sleeve and the axle, and the dust ring 2, three that comprises the matching part that is located at the upper oral part of setting upright sleeve and axle opens watts 3 and " V " RunddichtringO 5;

Be provided with second black box between oil cylinder 15 and the axle 1 and between lower contact 21 and the axle 1, second black box comprises packing ring 17, supporting base 18, first seal receptacle 19 and second seal receptacle 20 that is located at oil cylinder and washing pipe matching part.

During use, the utility model is connected between drill bit and the drill collar, and moment of torsion is to pass to axle by upper drilling string, passes to piston by nine head threads, and piston passes to spline body, oil cylinder and lower contact by spline again, drives the drill bit rotation at last.The pressure of the drill then from the weight of top drilling tool, then acts on the compressible liquid by axle and piston pressure-bearing surface, and pressure fluid reaches the pressure of the drill on lower contact and the drill bit again, thereby makes drill teeth wedging stratum and fractured rock.Drilling well water is axle, washing pipe and the lower contact endoporus that enters damper by drilling rod, drill collar hydrophthalmia, is injected into the shaft bottom through drill bit.

Claims

1. all-hydraulic two-way drill-string shock absorbers, comprise axle (1), what cooperate with the middle and upper part of axle sets upright sleeve (4), the piston (11) that is connected with the middle part of axle, the washing pipe (16) that is connected with the bottom of axle, the lower contact (21) that is connected with the bottom of washing pipe, top cooperates with the bottom of setting upright sleeve and spline body (7) that the middle part cooperates with axle, be located at the oil cylinder (15) between spline body bottom and the lower contact top, the spline body can along on the piston/lower slider, it is characterized in that: in oil cylinder (15), fill with the 201-100 dimethicone that can compress, be configured for the liquid spring of damping; Be provided with first black box setting upright between sleeve (4) and the axle (1); Be provided with second black box between oil cylinder (15) and the axle (1) and between lower contact (21) and the axle (1).

2. all-hydraulic two-way drill-string shock absorbers according to claim 1, it is characterized in that: comprise that also the retaining ring (8), locking key (9), the locking screw that are located between axle (1) and the spline body (7) emit (10), be located at " O " shape back-up ring (12) of oil cylinder and spline body matching part, be located at the Y3 RunddichtringO (13) and the BA RunddichtringO (14) of oil cylinder and piston matching part.

3. all-hydraulic two-way drill-string shock absorbers according to claim 1 and 2, it is characterized in that: described first black box is established and is set upright between sleeve and the axle, comprises that the dust ring (2), three of the matching part that is located at the upper oral part of setting upright sleeve and axle is opened watt (3) and " V " RunddichtringO (5).

4. all-hydraulic two-way drill-string shock absorbers according to claim 1 and 2 is characterized in that: described second black box comprises packing ring (17), supporting base (18), first seal receptacle (19) and second seal receptacle (20) that is located at oil cylinder and washing pipe matching part.