CN200968192Y

CN200968192Y - Coal bed gas well head arrangement

Info

Publication number: CN200968192Y
Application number: CN 200620094140
Authority: CN
Inventors: 廉军; 周淼; 张大千; 赵春昶
Original assignee: Shenyang Huawei Petroleum Machinery Manufacturing Co Ltd
Current assignee: Shenyang Huawei Petroleum Machinery Manufacturing Co Ltd
Priority date: 2006-11-16
Filing date: 2006-11-16
Publication date: 2007-10-31
Anticipated expiration: 2016-11-16

Abstract

The utility model relates to a coal bed gas fore-shaft device, which is the improvement of the coal bed gas fore-shaft device structure and is a device that is used for controlling the flow volume of the coal bed gas, the fore-shaft pressure, switch and undertakes fore-shaft operation when in under-well operation; the utility model overcomes the weaknesses of the original fore-shaft device such as large volume, high cost and inconvenient disassembling; a flange is mounted on the upper end of the sleeve, two connecting tubes are connected on the sleeve and are separately connected with a lathe-dog valve and an union valve, a vertical tube is arranged on the flange, the vertical is provided with a connection tube and an union valve; the utility model has the advantages of simple structure, light weight, small volume, low cost, convenient disassembling, favorable tightness, excellent universality and flexible switch, which is suitable for applied on the coal bed gas well.

Description

Coal bed gas wellhead device

Technical field: the invention is the improvement to the coal bed gas wellhead device structure, is flow and well head pressure that completion is used to control coal bed gas later on, carries out the device of well head operation when switch and underground work.

Background technology: well head all adopted the used wellhead assembly in oil field in the past, adopted the clamp connection mode, all adopted 250 valves, made whole well head too heavy, and cost is also high, and dismounting is also inconvenient, is not suitable for coal bed gas well and uses.

Summary of the invention: the purpose of the invention provide a kind of simple in structure, switch flexibly, the coal bed gas wellhead device of dependable performance, safety; The purpose of the invention is to realize by following technical scheme: coal bed gas wellhead device, at the sleeve pipe upper end lower flange is installed, two adapters are installed below upper end, sleeve pipe communicates with adapter, on an adapter termination, use clip, steel ring, clip head connection clip valve, on another adapter termination, use joint, pressure cap, O shape cushion rubber, joint rubber cushion connection union valve, at upper flange, O shape cushion rubber is installed between the lower flange, and use studs, nut will be gone up, lower flange is fastening, upper flange is made pipe thread that is connected with standpipe and the tubing thread that is connected with oil pipe, standpipe is installed in pipe thread, on standpipe, install and take over, adapter communicates with standpipe, is taking over the termination joint, pressure cap, O shape cushion rubber, joint rubber cushion connection union valve, pipe thread is made in the sleeve pipe lower end.

The union valve, the clip valve is respectively by the union valve body, clip valve body and rubber cushion, pressure ring, spiral base, O shape cushion rubber, slotted cheese head screw, handwheel, Connection Block, valve shaft constitutes, the union valve body, the clip valve body is made the three way type structure respectively, wherein an end is made interior pipe thread, the other end of clip valve body is made the clamp connection structure, the union valve body other end is made external screw thread, tiltedly making the internal thread hole that is connected with Connection Block in the through hole, tiltedly in the through hole rubber cushion is being installed, compress with pressure ring, spiral base is installed on the valve shaft lower end, the valve shaft that spiral base is housed is contained in the pressure ring, Connection Block is installed on union valve body and the clip valve body, fix with slotted cheese head screw, at pressure ring, Connection Block, O shape cushion rubber is installed earlier on the valve shaft cylindrical, handwheel is installed on the valve shaft.

The advantage of the invention: because upper and lower flange adopts 250 wellhead flanges of standard, no matter any operation can be docked, and universal performance is good; Because overall structure adopts tubular structure to be connected with union valve, clip valve, simple in structure, light, cheap, switch is flexible; When docking sleeve pipe lower end pipe thread is docked with well with well, oil pipe links to each other with the tubing thread of upper flange lower end simultaneously, and connect union valve and clamp connection clip valve with pressure cap, realize easy accessibility, O shape cushion rubber is adopted in butt joint and junction after twining band on the sleeve pipe pipe thread or being coated with stop-leak compound, joint rubber cushion, rubber cushion etc. play sealing function; Have energising cable valve, so that dock with the cable threeway.

Description of drawings:

Fig. 1 is the coal bed gas wellhead device structural representation.

The specific embodiment: coal bed gas wellhead device: by clip valve 27, two union valves 28,29, clip 2, steel ring 3, clip head 4, studs 5, nut 6, upper flange 7, O shape cushion rubber 8,12,19,23, standpipes 9, take over 10, joint 11, joint rubber cushion 13, pressure cap 14, union valve body 15, rubber cushion 16, pressure ring 17, spiral base 18, slotted cheese head screw 20, handwheel 21, Connection Block 22, sleeve pipe 26, lower flange 24, valve shaft 25 form; The upper flange centre bore is made the pipe thread that is connected with standpipe, the tubing thread that is connected with oil pipe, pipe thread is made in sleeve pipe, standpipe lower end, make and take over two holes that communicate at its sleeve pipe upper end, make and take over a hole that communicates at the standpipe upper end, take over an end and make the pipe thread that is connected with joint, clip head; Two adapters are installed in sleeve pipe and take over the place, hole that communicates, can connect with welding, lower flange is installed in the sleeve pipe upper end, can connect with welding, upper flange is installed on the lower flange, and last, O shape cushion rubber is installed between the lower flange, fastening with studs and nut, in upper flange and pipe thread that standpipe cooperates, standpipe is installed, be in place, the hole installation adapter that adapter communicates in the standpipe upper end, can connect with welding, use joint respectively at the other end of two adapters, pressure cap, O shape cushion rubber, the joint rubber cushion is installed the union valve, takes on the termination at another that install on the sleeve pipe and uses clip, steel ring, clip head connection clip valve; Union valve 28,29 is made of union valve body 15, rubber cushion 16, pressure ring 17, spiral base 18, O shape cushion rubber 19,23, slotted cheese head screw 20, handwheel 21, Connection Block 22, valve shaft 25; The union valve body is made threeway inclined hole structure, external screw thread is promptly made with the termination that adapter links to each other in a straight-through termination, interior pipe thread is made in another termination, internal thread is made in the inclined hole end, be contained in rubber cushion, pressure ring in the inclined hole successively, at an end of pressure ring O shape cushion rubber is installed, spiral base is installed on the end of valve shaft, the valve shaft other end is made external screw thread, the valve shaft that spiral base is housed is installed in the pressure ring, and Connection Block is made internal and external screw thread, at the inside and outside installation O shape cushion rubber of Connection Block, Connection Block is installed in the inclined hole, handwheel is installed on the valve shaft.The member of clip valve and union valve internal construction and installation is identical, its difference only is that clip valve body and union valve body are different with the adapter connected mode and structure that bring is had any different, be that the clip valve body is made the ring boss structure with taking over link, adapt to the clamp connection mode; Taking over installation union valve in the sleeve pipe connection uses as exhaust, the pressure in control tubing and casing space, the union valve of installing on standpipe connect to be taken over is as water filling usefulness, and the water yield at the bottom of the control well connects at sleeve pipe that to take over the clip valve of installing be the service valve that connects the cable threeway.

Coal bed gas wellhead device is installed on the well head, is to dock with well after twining band or be coated with stop-leak compound on the pipe thread of sleeve pipe lower end, and the tubing thread of making on oil pipe and the upper flange is connected.

Coal bed gas wellhead device, flange adopts 250 wellhead flanges of standard, and no matter any operation can be docked, and universal performance is good; Because this device adopts tubular structure and valve to constitute, and is simple in structure, thereby light, cheap; Since adopt O shape cushion rubber in the junction, the joint rubber cushion, and the rubber cushion member improves sealing performance; Adopt the pipe thread form to be connected easy accessibility, adopt pressure cap to connect and clamp connection union valve and clip valve with well, thereby the valve body easy accessibility; Clip valve, union threshold switch are flexible, and performance is safe and reliable.

Claims

1, coal bed gas wellhead device, it is characterized in that, at the sleeve pipe upper end lower flange is installed, two adapters are installed below upper end, sleeve pipe communicates with adapter, on an adapter termination, use clip, steel ring, clip head connection clip valve, on another adapter termination, use joint, pressure cap, O shape cushion rubber, joint rubber cushion connection union valve, at upper flange, O shape cushion rubber is installed between the lower flange, and use studs, nut will be gone up, lower flange is fastening, upper flange is made pipe thread that is connected with standpipe and the tubing thread that is connected with oil pipe, standpipe is installed in pipe thread, is installed on standpipe and take over, adapter communicates with standpipe, taking over the termination joint, pressure cap, O shape cushion rubber, joint rubber cushion connection union valve, pipe thread is made in the sleeve pipe lower end.

2, coal bed gas wellhead device according to claim 1, it is characterized in that, the union valve, the clip valve is respectively by the union valve body, clip valve body and rubber cushion, pressure ring, spiral base, O shape cushion rubber, slotted cheese head screw, handwheel, Connection Block, valve shaft constitutes, the union valve body, the clip valve body is made the three way type structure respectively, wherein an end is made interior pipe thread, the other end of clip valve body is made the clamp connection structure, the union valve body other end is made external screw thread, tiltedly making the internal thread hole that is connected with Connection Block in the through hole, tiltedly in the through hole rubber cushion is being installed, compress with pressure ring, spiral base is installed on the valve shaft lower end, the valve shaft that spiral base is housed is contained in the pressure ring, Connection Block is installed on union valve body and the clip valve body, fix with slotted cheese head screw, at pressure ring, Connection Block, O shape cushion rubber is installed earlier on the valve shaft cylindrical, handwheel is installed on the valve shaft.