CN2046921U

CN2046921U - Rotational flow drilling speeder

Info

Publication number: CN2046921U
Application number: CN89204477U
Authority: CN
Inventors: 蔡俊林; 武宝生; 卓俊良; 宋振全; 林本初; 翟驰
Original assignee: Science And Technology Section Drilling Co No 2 Liaohe Petroleum Prospecting
Current assignee: Science And Technology Section Drilling Co No 2 Liaohe Petroleum Prospecting
Priority date: 1989-04-17
Filing date: 1989-04-17
Publication date: 1989-11-01

Abstract

The utility model relates to an under well tool used in well drilling for the geological exploration of petroleum, in particular to a tool used for washing the hole of a well, comprising an upper connecter, a lower connecter, an inner barrel, an outer barrel, a nozzle, an overflow plate, etc. In the normal process of drilling, due to the effect of the action of high pressure slurry, high-velocity rotation vortex flow is generated from the slurry of a partial well section by the device; the high-velocity rotation vortex flow can drain the bigger solid particles in the slurry from the nozzle, along the barrel wall of the well. Therefore, in the current process of well drilling, the defect that the upward deliverance of the broken rock debris at the bottom of the well is prevented by the big pressure of a liquid column is overcome. The device matched with a slurry fixing control device can thoroughly clean the hole of the well to improve the drilling speed, and is also suitable for well drilling in coal geology.

Description

Rotational flow drilling speeder

Employed downhole tool when the utility model relates to a kind of petroleum geology exploration drilling well is especially for a kind of instrument of flushing borehole.

In conventional drilling process, broken landwaste in the oil well is taken out of ground by mud circulation in the well, increase along with the oil drilling degree of depth, the formed bottom pressure of mud column also constantly increases, bigger shaft bottom head of liquid hindered that rock is broken and landwaste on return, the solid control equipment of ground filtration mud again can not be with the landwaste full scale clearance in the mud in addition, can cause landwaste to return the situation of shaft bottom once more like this by the drill bit Repeated Cutting with mud, must can cause mud balance and viscosity increased again and influence bit speed, in order to solve this difficult problem of ground return face on the landwaste as far as possible, drilling crew extensively adopts and improves slush pump pressure at present, strengthen measures such as mud displacement, but can not fundamentally administer.

The purpose of this utility model is on the basis that cooperates the current high-pressure jet drilling technology that generally adopts to be intended to improve the big discharge capacity of slush pump and a kind of eddy flow that provides creeps into speed increaser, it can overcome above-mentioned shortcoming, realizes the target of the interior mud cleaning down shaft bottom of well landwaste in the drilling process.

Its implementation is:

Rig is in normal drilling process, high-pressure slurry flows in the top connection 1 from drill collar, enter annular space between the inside and outside tube by two microscler circular holes above the top connection, flow into the inner core the inside by the tangential drainage hole above the overflow plate 7, produce the eddy current of rotation at a high speed, make in the mud big solid particle along the inner tube wall rotation and on, ejection from nozzle 3.Form another high-speed rotational like this in the annular space between the nozzle and the borehole wall and cause a low-pressure area, help improving the landwaste speed of getting rid of in the last return mud, mud further is purified, accelerated the jet velocity of mud and the ability at the bottom of the pump housing flushing manhole, avoided being mixed in larger particles landwaste in the mud and be brought to the shaft bottom and cause the Repeated Cutting phenomenon.

Advantage of the present utility model is: when cooperating drilling mud pump, mud line and ground mud cleaning system to use, can avoid holding assorted cutting grain under the arm in the mud in the well and return to the shaft bottom, thereby accelerate bit speed.

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing:

Accompanying drawing is: eddy flow creeps into the schematic diagram of speed increaser.

The utility model mainly contains the parts such as joint 1, nozzle block 2, nozzle 3, SOC.HD. cap screw 4, urceolus 5, interior tube 6, overflow plate 7, lower joint 8 and forms.

Box end with the top top connection of this device during use is connected with drill collar, the bottom is connected with the pin thread of drill bit, its structure be have in urceolus the inside one its inner core of line conical surface body such as be shaped as, the tapering of inner conical surface is 1: 5 or 1: 10, inner core top and bottom respectively with top connection, the radially position of overflow plate is adopted and is tightly fixed, top connection and lower contact link into an integrated entity by screw thread and urceolus, urceolus is to manufacture with the sleeve pipe of 4-7 inch, the nozzle that two diameters are the 5-10 millimeter is fixed on above the nozzle block by the elastic circlip back-up ring, nozzle block is fixed on above the top connection with SOC.HD. cap screw, mud therefrom flows through in the drill collar in order to make, have two microscler circular holes at the top connection position, can make in high-pressure slurry enters by drill collar, the urceolus annular space, flow into the inner core the inside by the drainage hole on the overflow plate, the big solid particle of carrying under one's arms in the mud so just can spray from nozzle along inwall; Be recycled to ground with mud at last, reach the purpose that purifies mud in the folding, the effect that said apparatus has been obtained through field trial; This device also is applicable to the coal field geology drilling well.

Claims

1, the device of employed flushing borehole is made up of urceolus 5 and inner core 6 thereof during a kind of petroleum geology exploration drilling well, its inner core is connected with top connection 1, overflow plate 7 respectively, and upper and lower joint links into an integrated entity by screw thread and urceolus; It is characterized in that:

A, described inner core upper position are equipped with a nozzle 3 of fixing with the elastic circlip back-up ring respectively are housed above two nozzle block 2 nozzle blocks,

B, described inner core be inside and outside line conical surface body such as to be shaped as, and the tapering of inner conical surface is 1: 5 or 1: 10,

C, described top connection position are drilled with two microscler circular holes.

2, device according to claim 1; It is characterized in that urceolus is to manufacture with the sleeve pipe of 4-7 inch.