CN2883872Y

CN2883872Y - Well killing appts. of high pressure gas underground gas storage well

Info

Publication number: CN2883872Y
Application number: CN 200520036522
Authority: CN
Inventors: 冉训
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-16
Filing date: 2005-12-16
Publication date: 2007-03-28
Anticipated expiration: 2015-12-16

Abstract

The utility model belongs to a safety installation, which is used to prevent the high pressure gas in gas conservation well from going up and down. The utility model is composed of a plate body comprising a central hole or a wheel rib type gland, a plurality of anchor bolts which are arranged at the lower side of the gland and the lower end of the anchor bolts is provided with a fork type or frame type fixed head, and each of the anchor bolts is securely connected with the gland in an adjustable manner. A complete set of hold-down gear is fastened to the inner of the pit by a fixed head and cement mortar. The gland is weighed on the well mouth by the outside the center hole for the purpose. The utility model has the advantages of having simple and reliable structure of the hold-down gear, being adjustable in pressure, capable in fixing the old well effectively and reinforcing the new well preventively, and having long service life. The utility model also has the advantages of overcoming the shortcoming that the well bore is easy to be moved up and down as well as rotated, the personnel and equipment is endangered, and the service life of the gas storage well is far from standard requirements due to the variableness of ambient temperature and gas conservation cause the insurmountable defect in cementing method for the current gas storage well.

Description

Well for storage of high pressure gas kill-job device

Technical field

The utility model belongs to a kind of safety installations that prevents that the upper and lower string of well for storage is moving, particularly a kind of kill-job device that adopts fixing frame pit shaft to be close to the shaft bottom.

Background technique

At present, well for storage deposit high-pressure natural gas is extensively adopted in compressed natural gas (CNG) supply station, waits air feed to give the combustion gas user.In the patent No. is ZL96224179.2, and denomination of invention is exactly this type of caisson for " well for storage of high pressure gas " is disclosed.Its well body main structure is the bulb-type end socket for adopting multistage socket organizine to link the pit shaft, the wellbore bottom that are connected into one, and this pit shaft is all fixed by the cement slurry and the borehole wall from well head to wellbore bottom.Traditional well cementation (deciding) method is a grout injection between the pit shaft and the borehole wall from top to bottom, because the gap between the pit shaft and the borehole wall generally is no more than 3.0cm, and well depth generally is 80～150m, cement slurry is difficult to reach the following degree of depth of 10m, and when well cementation pit shaft and the borehole wall between underground water and gas cannot discharge, more smooth, the cement of well bore face structure poor adhesive force with it in addition, pit shaft fixedly is difficult to reach requirement; Disadvantage at traditional cementing method, the patent No. is that ZL01108413.8 disclosed " fixation method of underground gas storage well shaft " then is from the pit shaft one side flexible pipe that avales, by upwards grouting of shaft bottom, though this method has overcome the depth as shallow of being in the milk from top to bottom, gas and underground water such as cannot discharge at problem, but exist because the wellhole up rightness that adopts geological drilling to offer is poor, the borehole wall is uneven, and pit shaft is a rigidity, grouting hose very easily is crushed and causes cement slurry not descend to irritate, easily pit shaft is held up again with the cement slurry of irritating at present, difficulty of construction is big, influence fixed effect, still be difficult to the requirement of the standard that reaches.Thereby above-mentioned gas storage well all exists between the pit shaft and the borehole wall and is difficult to be tightened to one by cement slurry, moving and the rotation of upper and lower string easily takes place at situation well-sinkings such as ambient temperature and gas-storing capacity variations, once took place when serious to go here and there on the pit shaft upper pipeline was broken, cause the sudden leakage of high pressure air, personnel and installation security are caused very big threat, and many gas storage wells reach far away just has to so scrap in advance service life.

Summary of the invention

The purpose of this utility model is a kind of well for storage of high pressure gas hold down gag of design, in order to old gas storage well in using and the new gas storage well of installing are carried out consolidation process, reach and prevent the moving and rotation of the in use upper and lower string of gas storage well bore, improve the Security of gas storage well gas storage and operation, prolong purposes such as its working life.

Solution of the present utility model is that a kind of top of design is connected with the pit shaft upper oral part, and the bottom is then by concrete pedestal and the fixing support body of melt pit, and this support body is fixed in pit shaft in the well body securely by regulating axial pressure, thereby realizes its purpose.Because of the utility model comprises support body, key is that this support body comprises that the gland and that is provided with a center hole is mounted on the stone bolt of gland bottom and its lower end band fixing head, and each stone bolt is by nut and adjustable being fastenedly connected of gland symmetry.

Above-mentioned gland is plate body formula gland or spoke-type gland.And described fixing head is fork-type fixing head or frame-type fixing head.

The utility model passes the well head connecting head by the gland center hole and is pressed on the suitable for reading or wellhead flange of pit shaft, and the fixing head of each stone bolt lower end then is fixed in the melt pit by cement mortar, and regulates its axial pressure by nut.Thereby it is simple in structure, reliable to have hold down gag, and adjustable in pressure also can be fixed old well effectively, and new well is carried out preventative reinforcing, prolongs characteristics such as its working life.

Description of drawings

Fig. 1, be the utility model structural representation (plan view);

Fig. 2, be the plan view of Fig. 1;

Fig. 3 installs and user mode figure for the utility model, and wherein double dot dash line is a gas storage well.

Among the figure: 1, gland, 2, nut, 3, stone bolt, 3～1, (frame-type) fixing head; 4, pit shaft, 4～1, wellhead assembly, 4～2, bottom bulkhead, 5, concrete pedestal, 6, the stratum.

Embodiment

Present embodiment is that the well for storage hold down gag of 7 o'clock (177.8mm) is an example with the pit shaft external diameter:

Gland 1 adopts thick 30mm steel gland, external diameter φ 1600mm, center-hole diameter φ 179mm; Be symmetrical arranged the stone bolt attachment hole of 4 diameter phi 38mm along the gland outside.Stone bolt 3 tops are the M36 screw thread, length overall 1200mm, and bottom fixing head 3～1 adopts the frame-type fixing head, the thick 20mm of upper and lower deckle board, diameter phi 300mm, the bolt by 4 M16 connects into framework; The stone bolt 3 of a whole set of band frame-type fixing head 3～1 is integral by nut 2 and adjustable being fastenedly connected of gland.

Fig. 3 is user mode figure: the center radius R750mm place along gas storage well 4 offers a wide 500mm, and dark 1 meter annular melt pit places in the hole back with cement mortar perfusion each frame-type fixing head, after solidifying nut 2 is tightened to get final product.The manner can be resisted 200KN with the influence of upthrust to gas storage well.

Claims

1, a kind of well for storage of high pressure gas kill-job device, comprise support body, it is characterized in that this support body comprises that the gland and that is provided with a center hole is mounted on the stone bolt of gland bottom and its lower end band fixing head, each stone bolt is by nut and adjustable being fastenedly connected of gland symmetry.

2, by the described well for storage of high pressure gas kill-job of claim 1 device; It is characterized in that described gland is plate body formula gland or spoke type gland.

3, by the described well for storage of high pressure gas kill-job of claim 1 device; It is characterized in that described fixing head is fork-type fixing head or spoke type fixing head.