CN201705267U

CN201705267U - Well mouth rotary ejection preventer

Info

Publication number: CN201705267U
Application number: CN2010201671195U
Authority: CN
Inventors: 华宇鹏; 赵社强; 胜照平; 黄全斌; 秦志勇; 杨利平; 唐艳玲
Original assignee: Underground Special Operations Office Of Sinopec Group Zhongyuan Petroleum Exploration Bureau; China Petrochemical Corp
Current assignee: Underground Special Operations Office Of Sinopec Group Zhongyuan Petroleum Exploration Bureau; China Petrochemical Corp
Priority date: 2010-04-22
Filing date: 2010-04-22
Publication date: 2011-01-12
Anticipated expiration: 2020-04-22

Abstract

The utility model relates to a well mouth rotary ejection preventer belonging to a well mouth control device for oil exploration and development. The well mouth rotary ejection preventer comprises an upper flange, a support sleeve, a slip block, a bearing block, a slip, a slip support sleeve, bearings, a handle, a spring and a lower flange, wherein the lower flange is arranged on a well mouth and connected with the well mouth through a bolt, and the bearing block, the support sleeve and the upper flange are sequentially in threaded connection to the lower flange; an L-shaped slide chute for installing the handle is arranged on the outer wall of the lower flange, a spring is installed between the lower part of the lower flange and the handle, and the slip support sleeve is installed on the handle; one bearing is installed between the outer wall of the slip support sleeve and the inner wall of the lower flange; and the other two bearings are respectively installed in the bearing block and at the lower part of the upper flange, the slip block is installed between the two bearings, and the slip is installed in the slip block and is in conical-surface fit with the slip block. When used for drilling a cement plug, the well mouth rotary ejection preventer can prevent a square drill stem from moving up to effectively avoid the occurrence of the accident that the square drill stem and a underground pipe column are ejected out of a shaft by high-pressure oil-gas flows.

Description

The anti-apical organ of well head rotation

Technical field

The utility model relates to the anti-apical organ of a kind of well head rotation, belongs to the petroleum exploration and development control head.

Background technology

When oil well repairing operation bores the shallow seated groundwater bod, exist well inner high voltage air-flow drilling tool is ejected pit shaft hidden danger, the crown drill accident takes place, when serious, cause device damage and casualties, at present, also do not have the interior air-flow of method control well drilling tool to be ejected the effective ways of pit shaft.

Summary of the invention

When the purpose of this utility model prevented to bore the shallow seated groundwater bod, high pressure draught ejected the defective of pit shaft to drilling tool, provided a kind of well head rotation anti-apical organ.

The utility model is made up of upper flange, support set, slip spider, bearing support, slips, slips support set, bearing, handle, spring, lower flange, lower flange is sitting on the well head, and be connected with well head by bolt, bearing support, support set, upper flange successively have been threaded on it; On the outer wall of lower flange, have " L " shape slip draw-in groove that handle is installed, between lower flange bottom and handle, spring is installed, the slips support set is installed on the handle; Between slips support set outer wall and the lower flange inwall bearing is installed; In the bearing support and upper flange bottom is separately installed with bearing and bearing, between bearing and bearing slip spider is installed, and slips is installed in the slip spider, and slips and slip spider are cone match.

The utility model can prevent that kelly bar is up when drilling out, effectively avoid kelly bar and down-hole string to be ejected the generation of pit shaft accident by well inner high voltage gas stream.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

Embodiment 1, as shown in Figure 1, the utility model is made up of upper flange 1, support set 2, slip spider 3, bearing support 4, slips 5, slips support set 6, bearing, handle 8, spring 9, lower flange 10, lower flange 10 is sitting on the well head, and be connected the bearing support 4 that has been threaded successively on it, support set 2, upper flange 1 with well head by bolt; On the outer wall of lower flange 10, have " L " shape slip draw-in groove that handle 8 is installed, between lower flange 10 bottoms and handle 8, spring 9 is installed, slips support set 6 is installed on the handle 8; Between slips support set 6 outer walls and lower flange 10 inwalls bearing 7 is installed; In the bearing support 4 and upper flange bottom is separately installed with bearing 11 and bearing 12, between bearing 11 and bearing 12 slip spider 3 is installed, and slips 5 is installed in the slip spider 3, and slips 5 is a cone match with slip spider 3.

Lower flange 10 is connected with well head by bolt, presses fixed handle 8 compression springs 9, slips 5 drops on slip spider 3 bottom under the deadweight effect, makes slips 5 interior latus rectums reach maximum, and guaranteeing makes a trip carries out smoothly; When drilling out, turning handle 8 moves it in " L " shape slip draw-in groove, under the effect of spring 9, handle 8 upwards promotes to move on slips support set 6 and the slips 5, latus rectums are dwindled and block the kelly bar outer wall, prevent that kelly bar is up, effectively avoid kelly bar and down-hole string to be ejected the generation of pit shaft accident by well inner high voltage gas stream.

Claims

1. apical organ is prevented in a well head rotation, form by upper flange (1), support set (2), slip spider (3), bearing support (4), slips (5), slips support set (6), bearing, handle (8), spring (9), lower flange (10), lower flange (10) is sitting on the well head, and be connected with well head by bolt, it is characterized in that: the bearing support (4) that has been threaded successively on the lower flange (10), support set (2), upper flange (1); On the outer wall of lower flange (10), have " L " shape slip draw-in groove that handle (8) is installed, between lower flange (10) bottom and handle (8), spring (9) is installed, slips support set (6) is installed on the handle (8); Between slips support set (6) outer wall and lower flange (10) inwall bearing (7) is installed; In the bearing support (4) and upper flange bottom is separately installed with bearing (11) and bearing (12), between bearing (11) and bearing (12), slip spider (3) is installed, slips (5) is installed in the slip spider (3), and slips (5) is a cone match with slip spider (3).