CN201193506Y

CN201193506Y - Blowout prevention pressure test oil drainage switch

Info

Publication number: CN201193506Y
Application number: CNU2008201049161U
Authority: CN
Inventors: 王景良; 杨臣; 陈树和
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2008-04-30
Filing date: 2008-04-30
Publication date: 2009-02-11
Anticipated expiration: 2018-04-30

Abstract

The utility model discloses a blowout prevention pressure testing oil drain switch which comprises an upper joint (1) and a lower joint (9). The upper joint (1) and the lower joint (9) are connected in screw threads. A slide tee (3) is fixed in the upper joint (1) by a pin (4). The lower part of the hollow slide tee (3) is equipped with a clamp spring (5). The upper opening of the slide tee (3) is conical surface which is provided with a ball (2). A spring (8) is installed in the lower joint (9). A hollow movable bracket (7) with a hole at the upper part is arranged at the spring (8). The upper part of the movable bracket (7) is arranged in the slide tee (3). Clamp rings (6) are arranged between the lower end face of the upper joint (1) and the lower joint (9) and the movable bracket (7). The blowout preventing pressure testing oil drain switch has the characteristics of small size, convenient installation, simple operation and shutting in a well fast. The blowout prevention pressure testing oil drain switch solves the problems of preventing the blowout of a pipe column and testing the pressure during the trip process of the prior rod type pump well oil pipe column and draining oil during the operation.

Description

Blowout prevention pressure testing draining switch

Technical field:

The utility model relates to a kind of instrument of using in the oilfield downhole operation field, especially a kind of blowout prevention pressure testing draining switch.

Background technology:

In the oilfield downhole operation team job execution process, following pipe or often occur blowout and well kick phenomenon when playing pipe, with traditional method preventer will be installed stops operation, the long construction speed that influences of time, seriously pollutedly promptly be unfavorable for safety and environmental protection, and can't pressure testing behind the intact tubing string in insert pump down-hole, the checking of having no way of of the sealing of tubing string.

The utility model content:

In order to overcome the deficiency in the background technology, the utility model provides a kind of blowout prevention pressure testing draining switch.This instrument solves that existing rod-type pump sump oil pipe tubing string removes tubing string blowout prevention in the process, pressure testing and the problem of draining when this operation.

The technical scheme of employing of the present utility model is: this blowout prevention pressure testing draining switch comprises top connection and lower contact, top connection and lower contact are threaded, by dowel fixes the slip ball seat is arranged in the top connection, hollow slip ball seat bottom is equipped with jump ring, the suitable for reading of slip ball seat is the conical surface, sit on the conical surface ball is arranged, spring is installed in the lower contact, sit on the spring travel(l)ing rest hollow and that top is with holes is arranged, the top of travel(l)ing rest places in the slip ball seat, between top connection lower surface and lower contact and the travel(l)ing rest snap ring is installed.

The utlity model has following beneficial effect: blowout prevention pressure testing draining switch is connected the bottom of oil pipe tubing string, it is the position between insert pump outer working tube and the screen casing, it is characterized in that: prevent when 1, managing down that OIH water is sprayed onto ground in oil pipe, the protection environment is not subjected to oily wastewater pollution; 2, can carry out single operation pressure testing to tubing string after having descended tubing string, the sealing of checking tubing string; 3, when descending subjob, the profit in the tubing string can be leaked into oil sets annular space, guarantee that profit does not take ground to, the protection environment.

Description of drawings:

Fig. 1 is a sectional view of the present utility model.

The 1-top connection, 2-ball, 3-slip ball seat, 4-pin, 5-jump ring, 6-snap ring, 7-travel(l)ing rest, 8-spring, 9-lower contact.

The specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing: this blowout prevention pressure testing draining switch comprises top connection 1 and lower contact 9, top connection 1 and lower contact 9 are threaded, be fixed with slip ball seat 3 by pin 4 in the top connection 1, slip ball seat 3 is hollow, slip ball seat 3 bottoms are equipped with jump ring 5, the suitable for reading of slip ball seat 3 centre bores is the conical surface, sit on the conical surface ball 2 is arranged, spring 8 is installed in the lower contact 9, and sitting on the spring 8 has travel(l)ing rest 7, and travel(l)ing rest 7 supports by spring 8, travel(l)ing rest 7 tops have the hole, extraction liquid passes through thus during the oil well operate as normal, and there is centre bore at travel(l)ing rest 7 centers, and the top of travel(l)ing rest 7 places in the slip ball seat 3, between top connection 1 lower surface and lower contact 9 and the travel(l)ing rest 7 snap ring 6 is installed, when suppressing, slip ball seat 3 is descending, and the jump ring 5 of slip ball seat 3 bottoms blocks mutually with snap ring 6.

This blowout prevention pressure testing draining switch is along with tubing string is gone into the well, and this moment, ball 2 and slip ball seat 3 were in closed state under the effect of pin 4, thereby guaranteed that running string does not have profit to enter in the oil pipe, plays the blowout prevention effect; With cementing truck or hydraulic test pump tubing string being carried out pressure testing behind the intact tubing string down, under the effect of pressure, cut off pin 4, ball 2 and slip ball seat 3 are descending and make jump ring 5 be stuck in snap ring 6 places, have finished the pressure testing operation this moment; After the tubing string pressure release, it is up to promote travel(l)ing rest 7 under the effect of spring 8, with ball 2 jack-up, thereby sets up the draining passage.When this state pressure testing, under the effect of big flow, it is descending to promote ball 2, and this pathway closure just can be finished the pressure testing operation.This switch can be reused.

Claims

1. blowout prevention pressure testing draining switch, comprise top connection (1) and lower contact (9), it is characterized in that: top connection (1) and lower contact (9) are threaded, be fixed with slip ball seat (3) by pin (4) in the top connection (1), hollow slip ball seat (3) bottom is equipped with jump ring (5), the suitable for reading of slip ball seat (3) is the conical surface, sit on the conical surface ball (2) is arranged, spring (8) is installed in the lower contact (9), spring (8) is gone up to sit travel(l)ing rest (7) hollow and that top is with holes, the top of travel(l)ing rest (7) places in the slip ball seat (3), between top connection (1) lower surface and lower contact (9) and the travel(l)ing rest (7) snap ring (6) is installed.