CN202081851U

CN202081851U - Polish rod sealing apparatus

Info

Publication number: CN202081851U
Application number: CN201020273973XU
Authority: CN
Inventors: 王金铸; 王志坚; 荣雁; 马志刚; 毕友军; 李小林; 刘正时
Original assignee: 毕友军
Priority date: 2010-07-28
Filing date: 2010-07-28
Publication date: 2011-12-21
Anticipated expiration: 2020-07-28

Abstract

The utility model discloses a polish rod sealing apparatus, comprising a main body, a flash board body, a side wing protection sleeve, an anti-spraying tube assembly, a sealing packing and the like; before air injection, the side wing protection sleeve is unscrewed, the anti-spraying box of the flash board is sealed, and the anti-spraying tube is mounted to inject the air, seal well and open flow; the anti-spraying tube, the side wing protection sleeve and a four-way pipe are in threaded connection through oil tubes to form a sealed space; the packing box is packed into the sealed space to greatly reduce the possibility of leakage of steam; in use, when a first-stage packing is invalid in sealing, a second-stage packing starts functioning in sealing; if all the packings are completely invalid in sealing, the polish rod is tightly held by closing the sealing box of the polish rod, in order to exchange the packing under pressure, the blowout phenomenon caused by bottom hole pressure surge when an ordinary packing box is exchanged can be prevented, thereby increasing security and operability in oil extraction.

Description

Polished rod sealer

Technical field:

The utility model relates to oil field oil pumping production safety sealing device, particularly a kind of polished rod sealer.Be mainly used in steam thermal recovery of heavy oil field and adopt abovegroundly, be installed in well head top, the annular space between the sealing polished rod and the external world reaches the purpose that safety, environmental protection are produced.

Technical background:

In the thickened oil recovery process, main technology has steam viscosity reduction, electrical heating, mixes chemical agent etc., the oil extraction technique that the heavy oil wells great majority of well depth below 1000m adopt steam injection, vexed well, blowing, machine to take out, along with science and technology constantly develops, the gas injection technology also improves constantly, and notes are adopted integral process and are applied in widely in the gas injection oil recovery process, realized from the gas injection to the machine, taking out the mode of fixed tubular column, not operation, save cost, reduced labour intensity, increased production efficiency simultaneously.

The polished rod sealer kind that adopts is many now, we are combining the pluses and minuses of most polished rod sealers, consider its operability and safety emphatically, several oil production technology designer and the site operation personnels that many years of experience is arranged have been organized, well-designed this new type of rod sealing unit.

Summary of the invention:

In order to guarantee steam injection; vexed well; blowing; machine is taken out the process medium and is not produced and leak outside; we have designed this cover polished rod sealer; its purpose is exactly the leakage problems that solves oil-field thick-oil exploitation steam in gas injection process; the technical scheme of being taked is: this utility model polished rod sealer; comprise main body 8; flashboard body 7; flank protective sleeve 6; lubricator 3; packing_seal 4; 5; packing_seal 5 is structure as a whole with main body 8; body interior is equipped with oval row and partly seals flashboard; flashboard body 7 by valve rod can be in main body back and forth movement; main body top secondary turriform packing_seal 4; can regulate the decrement of sealing by pressure-pad, external surface has the 31/2NU tubing round thread to connect lubricator with 3.

Description of drawings:

Fig. 1 is the polished rod sealer overall structure, comprises flashboard body, packing_seal, secondary turriform packing, lubricator, open flow gate, compositions such as flank protective sleeve and pressure release plug.

Fig. 2 is the flashboard body structure, comprises semicircle sealing and flashboard

The specific embodiment

The main feature of the utility model polished rod sealer is as follows:

1. technical data:

Polished rod sealer comprises main body 8, flashboard body 7, flank protective sleeve 6, lubricator 3,

packing_seal

4,5

Specification title: polished rod sealer

Sealing polished rod (mm): 25/28/32/38

Rated pressure (MPa) 35

Maximum operation (service) temperature ℃: 345

Material grade: EE

Seal test pressure (MPa): 35

Strengh testing pressure (MPa): 50

Connected mode: clip/flange/tubing round thread

Long * wide * high (mm): 450 * 90 * 650

2. design feature:

The design of this polished rod sealer mainly is to consider from safety, environmental protection and operability, packing_seal and main body are structure as a whole, can realize sealing polished rod by three grades of insurances, the flashboard body can screw by the both sides bolt and hold polished rod tightly, reaches the effect of sealing.

Temperature is about 340 ℃ when gas injection; if generation seepage; the staff can not be near the well site; the design of this product takes into full account contingent any problem in the gas injection process; on original basis, increased measures, before gas injection; the flank protective sleeve of outwarding winding; fasten the flashboard body, lubricator is installed is carried out gas injection; vexed well; open flow, lubricator; connect by tubing round thread between flank protective sleeve and the main body; make it form an airtight space; polished rod parcel the inside, even because the too high packing that causes of vapor (steam) temperature lost efficacy, perhaps packing_seal does not compress and causes seepage; the capital comes by this airtight space and ambient atmosphere completely cuts off; greatly reduce the possibility that steam leaks outside,, open that open flow gate and flank protective sleeve plug carry out open flow on the lubricator when beginning to change when taking out; if not having pressure shows; illustrate that this product sealing effectiveness is reliable, can directly change and take out, if pressure is arranged; check the intact degree of packing_seal, compressing packing box changes and takes out.

In the use, secondary turriform sealed packing began to work when packing_seal loses efficacy, if packing_seal all lost efficacy, hold polished rod tightly and realize the replace with pressure packing by closing the flashboard body, thereby cause the generation of blowout phenomenon when avoiding changing packing because of bottom hole pressure surge, increase the safety and the operability of recovering the oil.

More than be the overall structure of this product, below each component introduced respectively:

1. main body: the connected mode of main body and production tree has flange, clip, three kinds of forms of tubing round thread, blowout prevention box and primary seal are structure as a whole, reduce the leak point, inside is equipped with ellipse and is partly sealed flashboard, flashboard by valve rod can be in cylinder body back and forth movement, circumference is furnished with rectangular seal and O type circle is realized sealing, external surface has 31/2N U tubing round thread to connect lubricator to use, make it form a confined space, increase the safety of gas injection.

2. flashboard body (accompanying drawing 2): flashboard (71) is an oval structure, guidance quality, good airproof performance, the semicircle sealing (72) of end face sulfuration high-temperature resistant rubber material, 25,/28,/32,/38 4 kinds of specifications can be exchanged, hold polished rod tightly by compressing of flashboard body, realize bottom pressure and extraneous completely cutting off.

3. flank protective sleeve: for tubing round thread is connected, make it to become a confined space between flank protective sleeve and the main body with main body side is wing, on be furnished with the 1/2NPT plug, can carry out the open flow residual pressure by plug after gas injection is finished, safe and reliable.

4. lubricator: blooie pipe is installed in main body top; connect by tubing round thread, cooperate the flank protective sleeve that polished rod seal box integral body is wrapped in the airtight space, there is open flow gate 2 the lubricator upper end; connect pressure meter 1 simultaneously, can detect the sealing of seal box by pressure meter.

5. packing_seal: the packing_seal end face has skewed slot, can carry out installing/dismounting by motionless polished rod, and top is spiral turriform packing, compresses by the conical surface to seal, and top is rectangular seal, compresses sealing by loam cake.

Claims

1. novel polished rod sealer; comprise main body, flashboard body, flank protective sleeve, lubricator, packing_seal; packing_seal and main body are structure as a whole; body interior is equipped with oval row and partly seals flashboard; the flashboard body by valve rod can be in main body back and forth movement; main body top secondary turriform packing, the decrement that can regulate sealing by pressure-pad, external surface has the 31/2NU tubing round thread to connect lubricator usefulness.