CN2039735U

CN2039735U - Quick joint

Info

Publication number: CN2039735U
Application number: CN 88220612
Authority: CN
Inventors: 蔡承武; 丁怀琳; 谢俊; 曹明辉
Original assignee: TECHNICAL EQUIPMENT INST MARITIME GEOLOGY SURVEYING BUREAU
Current assignee: TECHNICAL EQUIPMENT INST MARITIME GEOLOGY SURVEYING BUREAU
Priority date: 1988-11-28
Filing date: 1988-11-28
Publication date: 1989-06-21

Abstract

The utility model relates to a quick joint used in the drilling operation for petroleum, making a casing tube be connected with the casing tube head, wherein, the lower part of the casing tube head is provided with a quick joint socket, and the upper part of the casing tube is provided with a quick joint plug. When the quick joint socket is connected with the quick joint plug, a locking device, a sealing ring and a positioning pin are arranged between the quick joint socket and the quick joint plug. The quick joint changes the installing process and the connecting mode of the existing casing tube and the casing tube head. The quick joint has the advantages that the quick joint is convenient and quick to connect and disassemble, the upper equipment can be arbitrarily installed in orientation way according to requirements, the intensity of labour is reduced, the installing quality and the safety can be exactly ensured, etc.

Description

Quick joint

The utility model relates to a kind of snap joint of pipe fitting, is used for the snap joint that sleeve pipe is connected with casing head in particularly a kind of petroleum drilling operation.

The connecting mode of existing sleeve pipe and casing head results in hand cramps to drillng operation, subject matter is (can be referring to Fig. 1～when Fig. 4) sending into cannula C in the well with landing joint A by box cupling B (Fig. 1), because of between landing joint A and the box cupling B for being threaded, torque is difficult to control, connect the tension difficulty that then gets loose, even have influence on the connection and the sealing of bottom casing string screw thread, connecting pine then influences thread seal, even the thread stripping phenomenon takes place; The installation of two public pipe nipple D (Fig. 2) needs the workman to arrive in the narrow and small hole E, and big by manpower threaded together labour intensity fully, installation quality can't guarantee, bring hidden danger to safety in production; Casing head F need install in narrow and small hole E with being connected equally of two public pipe nipple D, threaded together, finally to tighten the position often inconsistent with the former allocation of the side mouth of casing head F because of screw thread, brings difficulty (Fig. 3) certainly will for the installation of top choke manifold, blowout preventer set etc.; Casing head F is welded to connect (Fig. 4) with the employing that is connected with of two public pipe nipple D, and bond pad locations in narrow and small hole E, is carried out such welding shown in G, H among the figure, very inconvenient in the operation; Between casing head F, the two public pipe nipple D be threaded or the sealing of weld can't in time detect, have only after all parts install, just can carry out pressure testing, in case find to leak and all parts must be dismantled, reinstall again.

The purpose of this utility model provides a kind of snap joint, makes sleeve pipe and being connected of casing head reach easy for installation, and labor strength reduces greatly, and the connection sealing can detect in advance and blowout preventer set can directed arbitrarily effect.

Technical solution of the present utility model is: a kind ofly be used for the snap joint that sleeve pipe is connected with casing head, comprise: a casing head, the one two public pipe nipple that is connected with sleeve pipe, wherein, described casing head bottom has the snap joint socket, described two public pipe nipple top has the snap joint plug that is connected with described snap joint socket, when described snap joint socket is connected with the snap joint plug, sealing ring is housed between the two, alignment pin and locking device, described locking device comprises that at least two symmetrical distributions are installed in the socket middle part, latch segment between the socket and plug, the tongue of latch segment stretches into corresponding locking slot on the plug, and each latch segment back flexibly connects with the bolt that respectively drives that is installed on the socket.

Adopt the advantage of above-mentioned snap joint to be: the connection of casing head is simple, convenient and rapid with dismounting, blowout preventer set can directedly arbitrarily as required be installed, change existing installation process and connected mode fully, greatly reduced working strength of workers, improved installation quality and safety.

Describe most preferred embodiment of the present utility model in detail below in conjunction with accompanying drawing, further specify other purposes of the present utility model, feature and advantage.

Fig. 1～Fig. 4 is the existing casing head of explanation and the installation process of sleeve pipe and the schematic diagram of connected mode;

Fig. 5 is the sectional view of a most preferred embodiment of snap joint of the present utility model;

Fig. 6 is the local amplification view of snap joint embodiment illustrated in fig. 5;

Fig. 7 is the sectional view of another embodiment of snap joint of the present utility model;

Fig. 8 is an operation chart of the sleeve pipe that adopts snap joint being sent into well location.

Referring to Fig. 5, a kind ofly be used for the snap joint 1 that petroleum drilling operation makes sleeve pipe be connected with casing head, comprise a casing head 3, the one two public pipe nipple 7 that is connected with sleeve pipe 5, wherein, described casing head 3 bottoms have snap joint socket 9, and described two public pipe nipple 7 tops have the snap joint plug 11 that is connected with described socket 9, when plug 11 is connected with socket 9, only needs that plug 11 is inserted socket 9 and get final product.

Referring to Fig. 6, an alignment pin 13 is housed between socket 9 bottoms, plug 11 and socket 9 at least, insert in the pin-and-hole 16 corresponding on the plug 11 end 14 of alignment pin 13, makes plug 11 and socket 9 circumferential relative positionings, to determine the side mouth position of casing head 3.Alignment pin 13 preferably is uniformly distributed along the circumference six, thereby is enough to bear the moment of torsion of top equipment when installing; Two sealing rings 15 up and down are housed, to guarantee the sealing performance between plug 11 and the socket 9 between plug 11 tops, plug 11 and socket 9.Have pressure testing mouth 17 at the position of socket 9 tops between two sealing rings 15, like this plug 11 with can be after socket 9 is connected by the sealing of pressure testing mouth 17 check sealing rings 15, and need not to treat to carry out after all parts install, all bring convenience therefore for check sealing and erection equipment, pressure testing mouth 17 is sealed with plug 19 later, in case equipment is in use in case when leaking, high-pressure oil gas is from 17 ejections of pressure testing mouth; Between socket 9 middle parts, socket 9 and plug 11, locking device is housed,, prevents that high-pressure oil gas from throw off plug 11 and socket 9 to guarantee axial location between socket 9 and the plug 11.Described locking device comprises that at least two symmetrical distributions are installed in socket 9 middle parts, latch segment 21 between socket 9 and the plug 11, the tongue 23 of latch segment 21 stretches into corresponding locking slot 25 on the plug 11, the back of each latch segment 21 respectively drives bolt 27 and flexibly connects with being installed on the socket 9, can regulate the stretching out and take in of tongue 23 of latch segment 21 by regulate driving bolt 27, therefore, when installation sleeve tube head 3, only needing to regulate driving bolt 27 can make casing head 3 be connected with two public pipe nipples 7, need not to make casing head 3 unitary rotation and tighten, oversimplify operation greatly, reduced labour intensity.Latch segment 21 is preferably and is uniformly distributed along the circumference six, and is stressed so more even, more helps stoping latch segment etc. being squeezed bad because of the high-pressure oil gas effect.

In order to make the certain axial pretightening effect of acquisition between socket 9 and the plug 11, can make corresponding cooperation taper seat 29 and 30 respectively at middle side part outside socket 9 middle inside and the plug 11.Simultaneously, upper surface at each latch segment 21 tongue 23 is also made corresponding cooperation inclined-plane 31 and 32 respectively with the upper surface of plug 11 locking slots 25, like this, when latch segment 21 tongues 23 stretch into locking slot 25, can apply axial thrust load upwards to plug 11, cooperating between socket 9 and plug 11 produced certain axial pre tightening force between taper seat 29 and 30 thus, thereby increased coupling stiffness and stability between casing head 3 and the two public pipe nipple 7.

In order to prevent that tongue 23 and locking slot 25 from squeezing bad, each latch segment 21 can be designed to have an above tongue 23, correspondingly, the locking slot 25 of corresponding each latch segment 21 also is more than one, and have equally respectively and cooperate inclined-plane 31 and 32, in the present embodiment each latch segment 21 is designed to have three tongues 23, correspondingly, on plug 11, corresponding each latch segment 21 also is designed to have three locking slots 25, increase contact area like this, reduced contact pressure, prevented the crowded bad of tongue 23 and locking slot 25 effectively.

Referring to Fig. 7, locking device also can adopt the elasticity lock ring 33 that is installed between socket 9 middle parts, socket 9 and the plug 11, between the lock ring groove 36 of lock ring 33 middle side part outside the lock ring groove 34 of socket 9 middle inside and plug 11, on socket 9, be equipped with at least six along lock ring groove 34 circumference uniform distributions, 12 adjustment screw 37 the most, by adjusting adjustment screw 37, can adjust the ring footpath of snap lock ring 33, can realize that thus casing head 3 is connected and dismounting with two the quick of public pipe nipple 7.

Referring to Fig. 8, when the sleeve pipe 5 that adopts snap joint to connect is sent into well location, only need to adopt a substructure and socket 9 similar running tools 35.In advance two public pipe nipples 7 are fixedlyed connected with sleeve pipe 5, with running tool 35 bottoms with can hang sleeve pipe 5 after the plug 11 of two public pipe nipples 7 is connected and send into well location, after waiting to inject cement and solidifying, the running tool 35 that gets loose gets final product installation sleeve tube head 3 subsequently.It is first-class that the whole erection process does not need to turn landing joint, two public pipe nipple and sleeve pipe, thereby greatly reduce labour intensity, simplified operation, guaranteed quality, this shows the facility that adopts snap joint to bring to installation work.

According to design of the present utility model, also can make many conspicuous changes, or make new embodiment the foregoing description of the present utility model, these can not exceed the scope of the utility model claim.

Among above-mentioned each figure, identical label is represented identical structure or part.

Claims

1, a kind ofly be used for the snap joint that sleeve pipe is connected with casing head, comprise: a casing head, the one two public pipe nipple that is connected with sleeve pipe, it is characterized in that, described casing head bottom has the snap joint socket, described two public pipe nipple top has the snap joint plug that is connected with described snap joint socket, when described snap joint socket is connected with the snap joint plug, sealing ring is housed between the two, alignment pin and locking device, described locking device comprises that at least two symmetrical distributions are installed in the socket middle part, latch segment between the socket and plug, the tongue of latch segment stretches into corresponding locking slot on the plug, and each latch segment back flexibly connects with the bolt that respectively drives that is installed on the socket.

2, snap joint as claimed in claim 1, it is characterized in that, described locking device comprise six equally distributed along circumference, be installed in the latch segment between socket middle part, the socket and plug, the tongue of latch segment stretches into corresponding locking slot on the plug, and each latch segment back flexibly connects with the bolt that respectively drives that is installed on the plug.

3, snap joint as claimed in claim 1 or 2 is characterized in that, middle side part is made corresponding cooperation taper seat respectively outside described socket middle inside and plug; Each latch segment has three tongues, and corresponding each latch segment has three corresponding locking slots on the plug, and the upper surface of each tongue is made corresponding cooperation inclined-plane respectively with the upper surface of each locking slot.

4, snap joint as claimed in claim 1, it is characterized in that, described locking device comprises the elasticity lock ring that is installed between socket middle part, the socket and plug, between the lock ring groove of elasticity lock ring middle side part outside the lock ring groove of socket middle inside and plug, on socket, 12 adjustment screw are installed along lock ring groove circumference uniform distribution.