CN202578605U

CN202578605U - Striking-while-drilling jar knocker

Info

Publication number: CN202578605U
Application number: CN 201220174621
Authority: CN
Inventors: 孙友宏; 李小洋; 马银龙; 高科; 王清岩; 刘宝昌; 张献振; 曹宇
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2012-04-23
Filing date: 2012-04-23
Publication date: 2012-12-05
Anticipated expiration: 2022-04-23

Abstract

The utility model discloses a striking-while-drilling jar knocker comprising an upper connector, a knocker barrel, a piston, a steel ball, a return spring, a lower connector and a sealing ring. The upper connector, the knocker barrel and the lower connector are connected through a thread, the piston is arranged in the knocker barrel and divides the knocker barrel into an upper cavity and a lower cavity, the piston upper cavity serves as a drilling fluid decompression channel, the piston lower cavity is provided with the return spring, the upper end of the spring abuts against a piston shoulder, and the lower end of the spring abuts against an inner stair of the lower connector. Drilling fluid can successfully pass through from an inner hole of the piston during normal drilling process. When drilling blocking occurs, the drilling fluid channel is sealed by throwing the steel ball and the drilling fluid pushes the piston to move downward and compress the spring. When the drilling fluid on the upper end of the piston is compressed, the compressed return spring rebounds and pushes the piston to hit the upper connector to achieve the aim of unblocking. The striking-while-drilling jar is simple in structure, few in motion elements, high in striking and knocking efficiency, and good in unblocking effect.

Description

With boring impact jar

Technical field

The utility model relates to a kind of novel with boring impact jar, is a kind of releasing tool that is used for specially handling when drill string blocks in drilling or the drilling process.

Background technology

In the drillng operation because odjective cause such as geological structure complicacy, or the reason of technical elements such as misoperation, mud circulation be not smooth, the time regular meeting phenomenons such as piece, undergauge, sand bridge take place to cave in the hole, cause drilling tool in the hole be stuck (being commonly called as bit freezing).Bit freezing is very big to the progress influence of drilling well, is difficult for handling, and time requires great effort again, the accident that will cause institute's well bore to be scrapped when serious.

Patent CN2537808Y has announced a kind of novel with boring upward bumper jar; Employing valve distribution hydraulic oil is realized impact function, when the bit freezing unfreezing, has effect preferably, but has following some shortcomings: utilize valve control hydraulic oil to realize impact; Not only need special hydraulic oil; Cost is higher, and the requirement on machining accuracy of valve and associated components is high, prevent the leakage of hydraulic oil.

The utility model content

In order to overcome above deficiency, the utility model provides that a kind of the utility model is simple in structure and do not need special hydraulic oil with boring impact jar, and drilling mud promptly can be used as power source.With boring impact jar through joint screw thread and drill string link together up and down.When normally creeping into, this bumper jar can be used as drilling tool and uses, and does not influence and creeps into; When drill string is met card, can be through dropping into steel ball, measures such as pumping high pressure drilling liquid make the function of its Rapid Realization impact endurance test shock come unfreezing.

The utility model is made up of top connection, steel ball, jarring tube, piston, back-moving spring, lower contact and sealing ring, and through being threaded, the upper end of top connection and the lower end of lower contact are threaded with drill string respectively successively for top connection, jarring tube, lower contact; Jarring tube endoporus is installed piston, and there is a horn mouth piston upper end, and this horn mouth is used to place steel ball; The upper end of piston is against in the top connection; The lower end of piston is in the lower contact endoporus, and piston has endoporus, and the endoporus of jarring tube is divided into piston upper chamber chamber and piston lower chambers by piston land; The piston upper chamber chamber is connected with jarring tube relief hole and vent piston discharge orifice; The piston bottom chamber is installed back-moving spring, and the back-moving spring upper end is against on the piston land, and the back-moving spring lower end is against on the interior step of lower contact; Can move in the lower contact endoporus up and down in the piston lower end, between piston and the lower contact endoporus sealing ring is installed.

The course of work and the principle of the utility model are:

When normal drilling well, drilling fluid at the bottom of the through hole, does not influence normally carrying out of drilling well through top connection from the endoporus of piston; When running into lock of tool drilling, stop immediately to bore, dismantle the kelly on the raised platform around a well, drop into steel ball to the drill string endoporus, can connect kelly, and drive slush pump and pump into drilling fluid.Treat that steel ball falls on the upper end horn mouth of piston, block piston inner hole, drilling fluid is assembled in the piston upper surface.Under the pressure of drilling fluid, descent of piston compression spring energy-storage, when the piston upper end ran to the relief hole of jarring tube, drilling fluid got into the pressure release of piston upper chamber chamber rapidly.Piston is under the effect of back-moving spring, and the bump top connection quicks rebound.Under the effect of impact that so moves in circles, piston constantly impacts top connection, thereby reaches the purpose of impact endurance test shock unfreezing.

The beneficial effect of the utility model:

Combined the advantage of hydraulic impactor with boring impact jar, for the drill string unfreezing provides a kind of new method and structure.This bumper jar is simple in structure, and moving component is few, has significantly reduced fault rate.And do not disturb normal drilling process.When running into lock of tool drilling, can open impact jar fast and effectively, constantly upwards clash into top connection, drive the vibrations of stuck point drilling tool, thereby realize the unfreezing of drilling tool through piston.

Description of drawings

Fig. 1 is the cross-sectional schematic of the utility model;

The specific embodiment

As shown in Figure 1, present embodiment is made up of top connection 1, steel ball 2, jarring tube 3, piston 4, back-moving spring 5, lower contact 6 and sealing ring 7, and top connection 1, jarring tube 3, lower contact 6 are successively through being threaded; The lower end of the upper end of top connection 1 and lower contact 6 is threaded with drill string respectively; Jarring tube 3 endoporus are installed piston 4, and there is a horn mouth 46 piston 4 upper ends, and horn mouth 46 is used to place steel ball 2; The upper end of piston 4 is against in the top connection 1; The lower end of piston 4 is in the lower contact endoporus 61, and piston 4 has endoporus 45, and the endoporus of jarring tube 3 is divided into piston upper chamber chamber 41 and piston lower chambers 44 by piston land 42; Piston upper chamber chamber 41 is connected with jarring tube relief hole 31 and vent piston discharge orifice 43; Back-moving spring 5 is installed in the piston lower chambers 44, and back-moving spring 5 upper ends are against on the piston land 42, and back-moving spring 5 lower ends are against on the interior step 62 of lower contact; Can move in lower contact endoporus 61 up and down in piston 4 lower ends, between piston 4 and the lower contact endoporus 61 sealing ring 7 is installed.

The course of work of present embodiment is:

When drill string is met card, drop into steel ball 2 to the drill string endoporus, and drive slush pump and pump into drilling fluid, quicken the whereabouts of steel ball 2; When falling piston horn mouth 46 Deng steel ball 2, block piston inner hole 45, drilling fluid is assembled in piston 4 upper surfaces, when waiting drilling liquid pressure to be elevated to a certain value, thereby forces piston 4 to move downward along jarring tube 3 endoporus.When the upper surface of piston 4 goes downwards to bumper jar relief hole 31; High pressure drilling liquid moment is through jarring tube relief hole 31; Flow into piston upper chamber chamber 41, and then flow into piston inner hole 45, at last through lower contact endoporus 61 inflow shaft bottoms through near the vent piston discharge orifice the piston land 42 43.In the process that piston 4 moves downward, back-moving spring 5 is compressed between piston land 42 and lower contact endoporus step 62.

After the drilling fluid off-load, back-moving spring 5 energy stored just act on the piston land 42, promote piston 4 and move upward, and one-shot is accomplished in bump top connection 1, are so moving in circles down, and piston 4 constantly upwards clashes into top connection 1, until unfreezing.Lower contact 6 has designed sufficiently long lower contact endoporus 62, guarantees that piston has enough strokes in lower contact 6, and sealing ring 7 is arranged between the two, reduces the leakage of drilling fluid as far as possible.

Claims

1. one kind with boring impact jar; It is characterized in that: form by top connection (1), steel ball (2), jarring tube (3), piston (4), back-moving spring (5), lower contact (6) and sealing ring (7); Through being threaded, the lower end of the upper end of top connection (1) and lower contact (6) is threaded with drill string respectively successively for top connection (1), jarring tube (3), lower contact (6), and jarring tube (3) endoporus is installed piston (4); There is a horn mouth (46) piston (4) upper end; This horn mouth (46) is used to place steel ball (2), and the upper end of piston (4) is against in the top connection (1), and the lower end of piston (4) is in the lower contact endoporus (61); Piston (4) has endoporus (45); The endoporus of jarring tube (3) is divided into piston upper chamber chamber (41) and piston lower chambers (44) by piston land (42), and piston upper chamber chamber (41) are connected with jarring tube relief hole (31) and vent piston discharge orifice (43), and back-moving spring (5) is installed in the piston lower chambers (44); Back-moving spring (5) upper end is against on the piston land (42), and back-moving spring (5) lower end is against on the interior step (62) of lower contact; Can move in lower contact endoporus (61) up and down in piston (4) lower end, between piston (4) and the lower contact endoporus (61) sealing ring (7) is installed.