CN209398373U - A kind of damper for protecting top to drive - Google Patents

Abstract

The utility model discloses a kind of dampers for protecting top to drive, including driving the mandrel (1) that (7) are connect with top；Mandrel tip is equipped with one section of enlarged diameter section (11)；The reduced diameter section (12) of mandrel is equipped with one section of splined shaft (13), and splined shaft lower end is equipped with thread segment (14)；Thread segment is equipped with jarring pad (4), is equipped with internal screw thread (41) in jarring pad；Jarring pad is threadedly coupled with thread segment；The mandrel of thread segment lower end is equipped with piston component (5)；Spline body (3) are cased with outside mandrel；Splined hole (31) are equipped in spline body, splined hole and the sliding of mandrel (1) upper spline axis are sequentially connected；Spline body lower end is connect with pressure body (6) threaded upper ends；Pressure body lower end is threadedly coupled with drilling rod (8).It solves and drives drillng operation when beating surface layer ground using top, influence of the drill bit bouncing of drilling tool to derrick is reduced and eliminate, to improve the safety of drillng operation.

Description

A kind of damper for protecting top to drive

Technical field

The utility model relates to a kind of dampers for protecting top to drive, and belong to oil drilling tool technical field.

Background technique

At present petroleum, natural gas drilling operation in, top is driven drilling mode and is largely used, and the drive drilling well of so-called top is exactly Branch equipment is driven from the direct rotary drill rod in derrick space top by top, and is sent into downwards along exclusive guideway, and drilling rod rotation is completed Drilling circulating fluid, makes up a joint, the operation mode of a variety of drill-well operations such as upper shackle and back reaming.But in drilling process Some especially hard stratum are encountered or when creeping into earth formation, since generated bounce can very in broken rock for drill bit Be transmitted to top drive on, also generate simultaneous resonance so as to cause derrick, very big security risk brought to drillng operation.It drives on the top Damper is exactly to use disc spring as damping element, is mounted on top and drives between drilling rod, is come up for buffering the conduction of lower part drilling rod Bounce, thus avoid bounce act directly on derrick, achieve the purpose that protection top drive with derrick, remove a hidden danger raising bore The safety of well operations.

Eliminating in drillng operation at present or reducing the major measure of bit bounce is that vibration damping is mounted directly above drill bit Device is realized, but when carrying out drilling operation to ground surface layer, is mounted on damper since well depth is shallower and is arrived ground Drilling rod negligible amounts are pressed in the drilling rod lighter in weight on damper top, thus shock absorber to bit bounce can also pass through The top that drilling rod is transmitted to ground drives, and causes to impact to derrick, cannot completely eliminate drill bit bouncing of drilling tool to drilling rod, especially to well The influence of frame, and top drive damper is installed between top drive and lower part drilling rod can then greatly reduce or eliminate the influence.

Utility model content

The purpose of this utility model is to provide a kind of dampers for protecting top to drive, and are made with solving to use top to drive drilling well Industry reduces when beating surface layer ground and eliminates influence of the drill bit bouncing of drilling tool to derrick, thus improve drillng operation safety and gram Take the deficiencies in the prior art.

To achieve the above objectives, the present invention adopts the following technical solutions:

A kind of damper for protecting top to drive of the utility model, the mandrel including driving connection with top；Mandrel tip is set There is one section of enlarged diameter section；The reduced diameter section of mandrel is equipped with one section of splined shaft, and splined shaft lower end is equipped with thread segment；Thread segment is equipped with Jarring pad, jarring pad is interior to be equipped with internal screw thread；Jarring pad is threadedly coupled with thread segment；The mandrel of thread segment lower end is equipped with piston group Part；Spline body is cased with outside mandrel；Splined hole is equipped in spline body, splined hole and the sliding of mandrel upper spline axis are sequentially connected；Spline Body lower end is connect with pressure body threaded upper ends；Pressure body lower end is connect with drill rod thread.

It is previously used in the damper that protection top is driven, the intracorporal spline hole length of spline is less than mandrel upper spline axis Length；Spline body has certain and sliding stroke in splined shaft.

It is previously used in the damper that protection top is driven, spline body top is equipped with inner bore of step, the internal diameter of inner bore of step Slightly larger than the enlarged diameter section bottom cylinder outer diameter of mandrel；One group of disc spring being stacked is equipped in inner bore of step.

It is previously used in the damper that protection top is driven, the piston component includes upper piston and lower piston, and upper piston is under Pressure ring is equipped between piston, lower piston bottom is equipped with baffle ring, and baffle ring is stuck in the baffle ring slot of mandrel.

It is previously used in the damper that protection top is driven, the top, which is driven, to be located on derrick.

By adopting the above-described technical solution, the utility model top drive and lower part drilling rod between installation one damper with Influence of the drill bit in drilling process bring bouncing of drilling tool to derrick is prevented or reduced, is mainly had compared with traditional drilling mode following Several advantages: damper is mounted on the lower part that top is driven, more can effectively be subtracted compared with damper of the conventional mounting above drill bit Less and reduction drill bit bouncing of drilling tool is driven to top and the influence of derrick.The damper of the utility model is equipped with idle stroke, when bouncing of drilling tool is not serious When, it can directly block lower part drilling rod axial runout to influence the impact that top is driven；When serious bouncing of drilling tool occurs, can be effectively reduced Lower part drilling rod axial runout influences the impact that top is driven.Since the damper of the utility model is used on ground, damper is adopted Use disc spring as damping element, can to avoid conventionally employed silicone oil as damping element when the excessively high safety of bring chamber pressure Risk.Overcome the defect of the prior art.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is mandrel structure schematic diagram；

Fig. 3 is spline body structural schematic diagram；

Fig. 4 is jarring mat structure schematic diagram；

Fig. 5 is the application example schematic diagram of the utility model.

In the figure, it is marked as 1- mandrel, 11- enlarged diameter section, 12- reduced diameter section, 13- splined shaft, 14- thread segment, 15- baffle ring Slot, 2- disc spring, 3- spline body, 31- splined hole, 32- inner bore of step, 33- oil filler point, 4- jarring pad, 41- internal screw thread, 5- piston Component, 51- upper piston, 52- lower piston, 53- pressure ring, 54- baffle ring, 6- pressure body, 7- push up drive, 8- drilling rod, 9- derrick, 10- sheet Snap ring, 22- drill bit in utility model device, 21-.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples.

A kind of damper for protecting top to drive of the utility model, as depicted in figs. 1 and 2, including what is connect with top drive 7 Mandrel 1；It drives 7 and is located on derrick 9 in top.Mandrel 1 is as shown in Fig. 2, there is a bit of enlarged diameter section 11 on 1 top of mandrel；Mandrel 1 it is small straight Diameter section 12 is equipped with one section of splined shaft 13, and 13 lower end of splined shaft is equipped with thread segment 14；Thread segment 14 is equipped with jarring pad 4, jarring pad 4 As shown in figure 4, interior be equipped with internal screw thread 41；Jarring pad 4 is threadedly coupled with thread segment 14；The mandrel 1 of 14 lower end of thread segment is equipped with Piston component 5；Spline body 3 is cased with outside mandrel 1；Spline body 3 is as shown in figure 3, be equipped with splined hole 31, splined hole 31 in spline body 3 It slides and is sequentially connected with 1 upper spline axis 13 of mandrel；3 lower end of spline body is connect with 6 threaded upper ends of pressure body；6 lower end of pressure body with Drilling rod 8 is threadedly coupled.31 length of splined hole in spline body 3 is less than the length of 1 upper spline axis 13 of mandrel；Flower in spline body 3 The corresponding spline body 3 of keyhole 31 is equipped with oil filler point 33；Spline body 3 has certain and sliding stroke in splined shaft 13.Spline body 3 pushes up End is equipped with inner bore of step 32, and the internal diameter of inner bore of step 32 is slightly larger than the 11 bottom cylinder outer diameter of enlarged diameter section of mandrel 1；In step One group of disc spring 2 being stacked is equipped in hole 32.Piston component 5 includes upper piston 51 and lower piston 52, upper piston 51 and lower work Pressure ring 53 is equipped between plug 52,52 bottom of lower piston is equipped with baffle ring 54, and baffle ring 54 is stuck in the baffle ring slot 15 of mandrel 1.

Embodiment

This example is as shown in Figure 1, mainly by mandrel 1, disc spring 2, spline body 3, jarring pad 4, piston component 5, pressure body 6 and each Kind sealing element is constituted；Mandrel 1 passes through spline body 3 and is slidably connected by splined shaft 13 with the splined hole 31 on spline body 3, is sliding Torque can also be transmitted while connection；There is thread segment 14 in one end of mandrel 1, and jarring pad 4 is connected by screw thread with 1 screw thread of mandrel It connects.Piston component 6 is equipped with below the thread segment 14 of mandrel 1, piston component 6 is by being mounted on 14 lower part of thread segment of mandrel 1.It is living Plug assembly 6 includes upper piston 51, pressure ring 53 and lower piston 52.Piston component 6 is mounted on the thread segment 14 of mandrel 1 by baffle ring 54 Lower part, pressure body 6 are connect by screw thread with spline body 3, are equipped with an inner bore of step 32, inner bore of step in the upper surface of spline body 3 The disc spring 2 being stacked is installed, disc spring 2 is pressed in inner bore of step 32 through interior snap ring 21 and is close to the bottom of inner bore of step 32 in 32 Face.

If the device of the utility model uses as shown in figure 5, connecing utility model device 10 and drives 7 lower parts on top, then It is normally hinged with drilling rod 8 in 10 lower part of utility model device, does not need remaining operation, so that it may in 22 normal drilling well of drill bit Absorption feedback drives the vibration on 7 to top, and top drive 7 and the formation of frame well 9 are effectively protected.

Working principle: utility model device 10 can be regarded as by mandrel 1, disc spring 2, jarring pad 4, piston component 5 and each The Axle Parts that kind sealing element is constituted, and the outer cylinder base part being made of spline body 3 and pressure body 9.Axle Parts and outer cylinder class It can be with axial relative movement between component.When utility model device 10, which is mounted on top, drives 7 lower part, in spline body 3, pressure body 9 and lower part drilling rod 8 Gravitative Loads under, the splined hole 31 in spline body 3 is located at the bottom of 1 upper spline axis 13 of mandrel, this reality It is in new device 10 and is fully withdrawn state.I.e. the bottom face of spline body 3 pads 4 upper surfaces with jarring and is bonded.Drill bit 22 is normal When drilling, mandrel 1 completely dispenses with downward force, and the gravity for only relying on 22 top rod 8 of drill bit and the rock at 22 bottom of drill bit are close Fitting, top drive 7 and transmit torque by spline, and drilling operation can be completed.When drill bit 22 generates bouncing of drilling tool in drilling process, axis It is transmitted to pressure body 6 to vibration from lower part drilling rod 8, pressure body 6 slides up with spline body 3 along the splined shaft 13 in mandrel 1 It is dynamic, to block in the bouncing of drilling tool conduct vibrations to mandrel 1 of lower part drilling rod 8.And when serious bouncing of drilling tool occurs, produce larger vibration The vibration of spoke, when pressure body 6 in succession spline body 3 move up apart from it is larger when, the disc spring 2 on 3 top of spline body is big with mandrel 1 The contact of diameter segment bottom surface, at this moment such as continues to move up, and disc spring 2 can voluntarily compress and absorb the axial runout of lower part, thus Alleviate the influence that 7 and entire derrick 9 are driven in drilling rod 8 axial vibration in lower part to top, substantially increase reliability when drilling well with Safety.

Claims (5)

1. a kind of damper for protecting top to drive, including driving the mandrel (1) that (7) are connect with top；It is characterized by: mandrel (1) Top is equipped with one section of enlarged diameter section (11)；The reduced diameter section (12) of mandrel (1) is equipped with one section of splined shaft (13), under splined shaft (13) End is equipped with thread segment (14)；Thread segment (14) is equipped with jarring pad (4), is equipped with internal screw thread (41) in jarring pad (4)；Jarring pad (4) it is threadedly coupled with thread segment (14)；The mandrel (1) of thread segment (14) lower end is equipped with piston component (5)；Mandrel (1) housing There are spline body (3)；Splined hole (31) are equipped in spline body (3), splined hole (31) and mandrel (1) upper spline axis (13) sliding are driven Connection；Spline body (3) lower end is connect with pressure body (6) threaded upper ends；Pressure body (6) lower end is threadedly coupled with drilling rod (8).

2. the damper for protecting top to drive according to claim 1, it is characterised in that: the spline in the spline body (3) Hole (31) length is less than the length of mandrel (1) upper spline axis (13)；Spline body (3) has certain and sliding row in splined shaft (13) Journey.

3. the damper for protecting top to drive according to claim 1, it is characterised in that: spline body (3) top is equipped with Inner bore of step (32), the internal diameter of inner bore of step (32) are slightly larger than enlarged diameter section (11) bottom cylinder outer diameter of mandrel (1)；Step One group of disc spring (2) being stacked is equipped in inner hole (32).

4. the damper for protecting top to drive according to claim 1, it is characterised in that: the piston component (5) includes upper Piston (51) and lower piston (52) are equipped with pressure ring (53) between upper piston (51) and lower piston (52), and lower piston (52) bottom is set Have baffle ring (54), baffle ring (54) is stuck in the baffle ring slot (15) of mandrel (1).

5. the damper for protecting top to drive according to claim 1, it is characterised in that: drive (7) and be located at derrick (9) in the top On.