CN2594445Y

CN2594445Y - Bumper of three-deck cylinder drill well

Info

Publication number: CN2594445Y
Application number: CN 02259102
Authority: CN
Inventors: 周万江
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-08
Filing date: 2002-10-08
Publication date: 2003-12-24
Anticipated expiration: 2012-10-08

Abstract

The utility model relates to a three-layer cylinder bumper for drilling wells, which belongs to the technical field of petroleum machinery and is a novel bumper eliminating or relieving damage to a petroleum well drilling engineering and a well drilling tool when a drill bit jumps longitudinally. The three-layer cylinder bumper has four primary elements (referring to an attached figure-1) of an outer cylinder (1), a middle rubber cylinder (2), an inner cylinder (3) and a safety screw cap (4). The utility model is in a round steel long cylinder shape, and the outer cylinder (1) in the middle part, the middle rubber cylinder (2) and the inner cylinder (3) are mutually overlapped and are pasted together by caking agent. Part of the upper end of the outer cylinder (1) is protruded above the overlapped part of three layers, the protrusion part has a joint buckle conforming to the standard of API (American Petroleum Institute), and the joint buckle can be connected with a drill tool. Part of the lower end of the inner cylinder (3) is protruded above the overlapped part of the three layers, and the protrusion part has a joint buckle conforming to the standard of API (American Petroleum Institute), and the joint buckle can be connected with the drill tool. The outer cylinder (1) is not directly connected with the inner cylinder (3). When one end of the outer cylinder (1) is loaded with external force, the external force is transferred to the other end through the change of the shearing stress of the middle rubber cylinder (2).

Description

Three layers of tube drilling well damper

Technical field: the present invention relates to a kind of damper that is used for petroleum drilling engineering, damper by absorb the bit bounce energy and convert that other forms of energy is eliminated to or when reducing bit bounce for the infringement of drilling engineering and drilling tool, belong to the petroleum machinery technical field.

Background technology: run into some adamantine rocks through regular meeting in the petroleum drilling engineering operation, because the shaft bottom injustice, the drill bit of rotation periodically produces vertical jitter tempestuously, drives drilling tool (drilling rod and drill collar) during bit bounce and beats together.Overlap a time-out when the natural period of oscillation in the vertical jitter cycle and drilling tool of drill bit itself, just produce stronger beating, engineering term is called " bouncing of drilling tool ".Drill bit leaves the shaft bottom and drives drilling tool and moves upward together during bouncing of drilling tool, and then the height point that arrives from the motion together shaft bottom of falling.The gross weight of drill bit and drilling tool has tens of ton even more than hundred tons, huge motional inertia has very big destructive power, can impel drill bit damage (tooth, bead damage), drilling tool to damage (fracture, screw thread get loose) and cause engineering accident, even cause oil well to scrap.Prevent that the bouncing of drilling tool effective measures from being mounting shock absorber between drilling tool and drill bit, convert the energy absorption of bit bounce the energy of other form to, eliminate or alleviate the infringement that bouncing of drilling tool produces.

The damper that uses in the existing petroleum drilling engineering is the hydraulic oil damper.The primary structure of hydraulic oil damper is an annular fluid cylinder and an annular piston, is full of hydraulic oil (silicone oil) in the fluid cylinder.When the drill bit vertical jitter, hydraulic oil damper longitudinal load changes, and this load makes silicone oil generation volume compression distortion in the annular fluid cylinder or volume expansion distortion, thereby absorbs or discharge the energy of bit bounce, eliminates or alleviates the infringement that bouncing of drilling tool produces.

The defective of hydraulic oil damper is that silicone oil easily leaks, and after silicone oil leaked, just shock-absorbing function, service behaviour instability were removed in forfeiture.If change the damper of having lost shock-absorbing function halfway, need whole tens of tons even the drilling tool more than hundred tons are come from proposition ground, down-hole, be the work that bothers very much.

The job stability that how to improve damper is pursuing one's goal of petroleum machinery technical field always.

The purpose of this invention is to provide a kind of novel damper replacement hydraulic oil damper in the past, make the stable and reliable working performance of damper, make its intensity higher, simple in structure simultaneously, manufacturing cost is lower.

Summary of the invention: content of the present invention is a kind of damper of new structure, and its profile is a long tube of circular iron and steel, and its basic structural feature is: in the middle of the damper is one section three layers of tubular overlay structure, so be called three layers of tube drilling well damper.It has four critical elements, shown in figure 1: urceolus (1), intermediate rubber tube (2), inner core (3), Safety nut (4).Urceolus (1) has outside one section outstanding three plies part in the upper end, outstanding position is processed into and is met API (American Petroleum Institute (API)) modular connection button and can be connected with drilling tool, inner core (3) also has outside one section outstanding three plies part in the lower end, outstanding position is processed into and is met API modular connection button and can be connected with drill bit, the other end that urceolus (1) and inner core (3) do not have the API standard to buckle overlaps together, intermediate rubber tube (2) is positioned between urceolus (1) and inner core (3) overlap among the position, form three plies, the outer wall of intermediate rubber tube (2) is bonded with the inwall of bonding agent and urceolus (1), and the inwall of intermediate rubber tube (2) is bonded with the outer wall of bonding agent and inner core (3).Urceolus (1) and inner core (3) do not have direct connection relational, by mutually bonding with intermediate rubber tube (2) and connect indirectly respectively.When an end of damper is subjected to the external force load, must the external force load could be delivered to the other end by intermediate rubber tube (2).Safety nut (4) is installed in the upper end of inner core (3), cuts little ice during operate as normal, prevents contingency and designs.

The operating principle of three layers of tube damper: one section three ply parts in the middle of three layers of tube damper are typical rubber shear spring structures, so its operating principle is exactly the operating principle of rubber shear spring.When drill bit is beated, the longitudinal load of three layers of tube damper changes, longitudinal load changes and to impel intermediate rubber tube (2) to produce shear strain, and the energy of beating is changed into the shear strain energy, thereby reaches elimination or alleviate the effect of the infringement that bouncing of drilling tool produces.The damper bottom is connected with drill bit in practicality, and tens of tons of top and gross weight even the drilling tool that reaches more than hundred tons are connected, and promptly the inner core of damper (3) is connected with drill bit, and urceolus (1) is connected with drilling tool.When drill bit by the low spot of shaft bottom indentation when the height point that protrudes moves vertically upward, drill bit promotes inner core (3) and moves upward, and moves on the drive of inner core (3) outer wall and its mutually bonding intermediate rubber tube (2) inwall one side direction.Intermediate rubber tube (2) is inner to produce the shearing elasticity distortion with the energy absorption that moves upward, rubber tube (2) outer wall one side does not move upward, the urceolus (1) mutually bonding with intermediate rubber tube (2) outer wall do not move upward yet, and the drilling tool that is connected with damper urceolus (1) does not just move upward yet.When drill bit was landed downwards by the height point of beating, intermediate rubber tube (2) recovered the state before the shearing elasticity distortion, and urceolus (1) does not move downward, and the drilling tool that links to each other with urceolus (1) does not move downward yet.Like this, though drill bit is beated vertically in uneven shaft bottom, tens of tons of weight or the drilling tool more than hundred tons be bob not, and the purpose of damping has just reached.Safety nut (4) designs for the defence contingency, cut little ice during operate as normal, when drilling engineering runs into the drill-pipe-sticking-head accident, the load that upwards lifts increases, Safety nut (4) and inner core (3) move downward together and are seated on the inner step of urceolus (1), prevent that the excessive power that lifts from pulling out the bonding position of intermediate rubber tube (2), make damper have the bigger anti-intensity that lifts.

Do not contain hydraulic cylinder and silicone oil in three layers of tube drilling well damper structure, so can not take place in underground work because of silicone oil leaks the defective that loses shock-absorbing function, job stability is strong.Three layers of tube drilling well damper are simple in structure, and the wall thickness of inner core (3) and urceolus (1) all surpasses the wall thickness of existing hydraulic oil damper, and its stretching resistance intensity is greater than the tensile strength of the used drilling rod of existing drilling well, more greater than the tensile strength that has hydraulic shock absorber now.Three layers of tube lap in three layers of tube drilling well damper structure have enough length, and are bonded with bonding agent, and the intensity of its anti-fluid power pressure is greater than the anti-fluid power pressure intensity of existing hydraulic oil damper.Since simple in structure, mainly contain four elements and form, and its manufacturing cost is lower.Described above comprehensive, the goal of the invention that the present invention proposes all reaches, promptly provides a kind of novel drilling well damper to make its stable work in work, and intensity is big, and is simple in structure, and cost is low.

Description of drawings: accompanying drawing 1 is the structure chart of three layers of tube drilling well damper.

The specific embodiment: implement (consulting accompanying drawing-1), 1 in the following order) inner core (3), urceolus (1), Safety nut (4) are pressed drawing with three element machine-shaping, material is 35CrMo, or other can make the steel of drilling tool.2) with inner core (3), urceolus (1), clean up.3) with inner core (3), the overlapped position brushing of urceolus (1) bonding agent, inner core (3) the brushing outside, urceolus (1) is coated with the inboard.Bonding agent is the used bonding hot vulcanization agent of rubber industry.4) inner core (3), urceolus (1), Safety nut (4) are pressed the drawing assembling together.5) inwardly inject rubber in the space of bucket (3) and urceolus (1) overlapping part, rubber is the oil resistant high-temperature resistant rubber.6) inject be placed on behind the rubber sulfur still carry out baking make (2) moulding of intermediate rubber tube and and inner core (3), urceolus (1) be bonded.Manufacturing process just was all over after sulfuration was finished.

Claims

1, three layers of tube drilling well damper have four critical elements: urceolus (1), intermediate rubber tube (2), inner core (3) and Safety nut (4), it is characterized in that: in the middle of the damper is one section three layers of tube overlay structure, it is urceolus (1), intermediate rubber tube (2), inner core (3) overlaps mutually, the inwall of the outer wall of intermediate rubber tube (2) and urceolus (1) bonds together with bonding agent, the outer wall of the inwall of intermediate rubber tube (2) and inner core (3) bonds together with bonding agent, some protrudes in outside the three plies part urceolus (1) in the upper end, ledge has the joint button that meets API (American Petroleum Institute (API)) standard to be connected with drilling tool, some protrudes in outside the three plies part inner core (3) in the lower end, ledge has the joint button that meets the API standard to be connected with drill bit, urceolus (1) does not have direct connection relational with inner core (3), when its end is subjected to the external force load, be delivered to the other end by the variation of intermediate rubber tube (2) shear stress.