CN2821148Y

CN2821148Y - Double path cock valve

Info

Publication number: CN2821148Y
Application number: CN 200520034033
Authority: CN
Inventors: 王德玉; 相建民; 宋周成; 陈浩; 刘绘新
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2005-04-25
Filing date: 2005-04-25
Publication date: 2006-09-27
Anticipated expiration: 2015-04-25

Abstract

The utility model relates to a double path cock valve used for petroleum drilling process, which is mainly composed of an upper connector, a cone valve seat, a cone valve core, an upper valve seat, a universal joint, a valve ball, a lower valve seat, a fixed ring, a lower connecter, a side path, a main path, etc. The utility model is characterized in that an inner hole of the upper connecter, a through hole of the valve ball and an inner hole of the lower connecter form a first path (namely a major diameter path), and a radial hole on the fixed ring, a ring groove, a path on the upper connector and an interior path of the cone valve seat form a second path (namely a minor diameter path). Because the second path which can be opened and closed is additionally arranged on the structure of the utility model, not only the functions of the existing cock valve are maintained, but also the cock valve can be conveniently opened even under high pressure without applying a pressure source to the upper part of the valve ball. The problem that the existing cock valve is hard to open under the high pressure because of the large load torque of a rotary valve ball is solved.

Description

A kind of binary channels plug valve

Technical field

The utility model relates to the plug valve that is used for Process of Oil Well Drilling.

Background technology

In the drilling process of high-pressure oil-gas well, when strata pressure during greater than drilling well liquid columnpressure, formation fluid might enter in the well drilling fluid, causes overflow even blowout, must in time control.At present both at home and abroad the oil field be used for blowout prevention in the drilling rod the upper and lower plug valve of instrument kelly bar under high pressure (or claiming single channel plug valve) be difficult to open after closing, in case blowout in the drilling rod takes place in the process of making a trip, to cause great threat to the safety of personnel and rig, even the consequence of bringing on a disaster property.

The utility model content:

The purpose of this utility model is to provide a kind of binary channels plug valve, substitute original kelly cock, in drilling rod occurring, can rob the upper end that is contained in drill string during blowout, controlling drilling fluid effectively sprays in drilling rod, reduce the catastrophic effect that blowout out of control brings, connect simultaneously easily valve to be opened behind the kelly bar and continue follow-up drillng operation.

For reaching above-mentioned technical purpose, the technical solution adopted in the utility model is: a passage control that will have plug valve now changes large and small two passages control into, come the pressure reduction of balance cock ball front and back by the unlatching passage aisle, thereby can open plug valve master (greatly) passage easily.

A kind of binary channels plug valve, mainly form by top connection, conical valve base, poppet valve core, upper valve base, universal joint, valve ball, lower valve base, retainer ring, lower contact, wing passage, main channel etc., it is characterized in that, form first passage (being the major diameter passage) by the endoporus of top connection, the through hole of valve ball and the endoporus of lower contact, constitute the second channel (being smaller diameter passage) that to open, close by passage in the radial hole on the retainer ring, cannelure, the top connection and conical valve base internal channel together.

The utility model structurally also is provided with the one way valve of a little latus rectum, can back down steel ball with the dedicated pipe joint fluid in the drilling tool is introduced pressure meter, detects the pressure of drilling tool inner fluid, for follow-up kill job provides reference data.

Compared with prior art, the utility model has structurally been set up the second channel of opening, closing of a little latus rectum, this passage aisle is a relation in parallel with the main channel, thereby not only kept the function of existing plug valve, introduce the plug valve of opening that valve ball top can be light even under high pressure also need not the impressed pressure source, solved existing plug valve and under high pressure be difficult to problem that valve is opened too greatly because of the loading moment of rotation valve ball.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

Referring to Fig. 1, a kind of binary channels plug valve, mainly form by top connection 1, conical valve base 2, poppet valve core 3, upper valve base 4, universal joint 5, valve ball 6, lower valve base 7, retainer ring 8, lower contact 9, wing passage a, main channel b etc., it is characterized in that, form first passage (being the major diameter passage) by the endoporus of top connection 1, the through hole of valve ball 6 and the endoporus of lower contact 9, constitute the second channel (being smaller diameter passage) that to open, close by wing passage a in the radial hole on the retainer ring 8, cannelure, the top connection 1 and conical valve base 2 internal channels together.

The utility model in use, top connection 1 is connected with kelly bar, lower contact 9 and drilling rod upper end is connected, drives valve balls 6 by rotation universal joint 5 and revolves together and turn 90 degrees ball inner via hole and main channel b formation path.The state that this uses when being normal drilling well.Make universal joint 5 drive valve ball 6 reverse rotation 90 degree together, then passage b is disconnected, thereby stop flowing of drilling tool inner fluid, so can control blowout in the drilling tool.For follow-up kill-job drillng operation, connect kelly bar after, need open the main channel, the workman can be directly drives balls 6 with instrument rotation universal joint 5 and rotate together and open the main channel when the drilling rod internal pressure is low; When the drilling rod internal pressure is higher, the workman changes motionless universal joint, can rotate poppet valve core 3 this moment earlier opens cone valve, wing passage a in the radial hole of the lower flow process retainer ring 8 of valve ball 6 and cannelure, the top connection 1, the top that the conical valve base endoporus enters valve ball 6, the pressure reduction of the upper and lower part of balance valve ball 6 gradually, the moment that rotation valve ball 6 is needed becomes less, and then the rotation universal joint can be opened the main channel easily.

The utility model also is provided with the one way valve of a little latus rectum, described one way valve is made up of unidirectional valve seat 10, steel ball 11, spring 12, space in the one way valve is communicated with wing passage a, can back down steel ball with the dedicated pipe joint fluid in the drilling tool is introduced pressure meter, detects the pressure of drilling tool inner fluid.

Claims

1 one kinds of binary channels plug valves, mainly form by top connection (1), conical valve base (2), poppet valve core (3), upper valve base (4), universal joint (5), valve ball (6), lower valve base (7), retainer ring (8), lower contact (9), wing passage (a), main channel (b) etc., it is characterized in that, form first passage by the endoporus of top connection (1), the through hole of valve ball (6) and the endoporus of lower contact (9), constitute the second channel that to open, close together by wing passage (a) in the radial hole on the retainer ring (8), cannelure, the top connection (1) and conical valve base (2) internal channel.

2 plug valves as claimed in claim 1 is characterized in that, also are provided with an one way valve, and described one way valve is made up of unidirectional valve seat (10), steel ball (11), spring (12), and the space in the one way valve is communicated with wing passage (a).