CN200982192Y

CN200982192Y - Double flexibility joint for multi-bottom branch well

Info

Publication number: CN200982192Y
Application number: CNU200620167477XU
Authority: CN
Inventors: 朱世和; 程志红; 王少峰; 张艳君
Original assignee: China National Petroleum Corp; Liaohe Petroleum Exploration Bureau
Current assignee: China National Petroleum Corp; Liaohe Petroleum Exploration Bureau
Priority date: 2006-12-14
Filing date: 2006-12-14
Publication date: 2007-11-28
Anticipated expiration: 2016-12-14

Abstract

The utility model relates to a controllable double-flexible short-pitch which is used for the logging of multi-bottom and branch well and belongs to the logging instrument and cable connection device. The double-flexible short-pitch can bend freely when it is used in the middle and small holes of the multi-bottom and branch well, but can block and cause damage of the downhole instruments when it is used in the big hole, therefore the utility model comprises an upper joint, a lower joint and a middle joint, wherein the upper joint and the lower joint are respectively arranged inside the two cavities which lie at the two ends of the middle joint and a lead is led out from the cavity passage into the upper joint. In the working process the short-pitch and the instrument combine together, when the short-pitch is pressed in the well, both the upper joint and the lower joint draw near towards the middle joint and the sliding end of the upper and low joint enters into the top of the middle joint and the flexibility of the short-pitch disappears, when imposing force, the sliding end leaves the edge of the middle joint and the short-pitch is in free flexible state. The utility model can ensure the safety of the instrument and the credibility of the logging through adjusting the flexibility of the short-pitch.

Description

A kind of controlled double-flexibility pipe nipple of multi-bottom branch borehole logging tool that is used for

Technical field:

The utility model relates to a kind of controlled double-flexibility pipe nipple of multi-bottom branch borehole logging tool that is used for, and belongs to logger and cable connecting arrangement class.

Background technology:

Oil field slim-hole multi-bottom branch under development drilling well extensive use at present, in carrying out the well logging process, need after this technology completion cable and downhole instrument to be linked together by pipe nipple, just can test, because when this flexible pipe nipple uses, cable is in well and stretches or compressive state, only cause the free bend under action of gravity, can keep complete applying with the borehole wall, but lack the control function owing to pipe nipple when going into the well, in well, be hampered easily, when serious, can cause instrument damage because of being hampered.

Summary of the invention:

The purpose of this utility model is in order to overcome above-mentioned shortcoming; and a kind of controlled double-flexibility pipe nipple of multi-bottom branch borehole logging tool that is used for that provides; this controlled double-flexibility pipe nipple can avoid the downhole probe situation that is hampered to take place, and plays the protection downhole probe and the assurance measuring reliability of going into the well smoothly safely.

Technical solutions of the utility model:

For realizing above-mentioned task, the utility model is finished by following technical solution, described controlled double-flexibility pipe nipple is to have the thin bar of the prominent head of circle by top connection one end to be inserted into two ends and to have in the elongated slot transition joint of hole, and lower contact has prominent thin bar one end of circle and is inserted in the other end of hole circular groove transition joint.

Described top connection, lower contact all are made with stainless steel material, have lead to connect between upper and lower joint, and upper and lower joint all adopts stainless steel material to be made.

The utility model working method is such.

During use, top connection is connected with the cable box, lower contact is connected with downhole probe by screw thread, in the work this joint is lowered to the testing well section with instrument, when this joint under the borehole pressure effect, top connection and lower contact in the pipe nipple are all drawn close to the centre position, the distance that this moment, upper and lower joint sliding end entered into transition joint is the longest, and make sliding end and transition joint present 2 contact conditions, the axial location of upper and lower, middle three joints is near straight line, this moment, flexible pipe nipple was hard the connection, did not have flexible state.

When flexible pipe nipple is subjected to lifting power on the drilling tool, the sliding end that top connection and lower contact will be left the last lower contact of transition joint then moves to two edges of transition joint, this moment sliding end and transition joint presents the single-point contact condition, and the axis general of three joints is not flexible state freely point-blank.

The utility model compared with prior art has distinguishing feature:

Because the lead that the utility model has adopted top connection, lower contact and transition joint and has been attached thereto, during use, pipe nipple can avoid instrument to cause instrument damage owing to be hampered in transferring process, especially in large hole, occur the instrument and the borehole wall phenomenon of colliding easily and cause damage, the utility model can utilize the straight configuration of flexible pipe nipple to play corrective action in the case, avoid damaging instrument, therefore this device joint not only utilizes the double-flexibility pipe nipple can guarantee the instrument safety of going into the well, and can guarantee instrument dependable performance when measuring again.

Description of drawings:

Fig. 1 is the utility model structural representation.Fig. 2 is the utility model extended state schematic diagram.Fig. 3 is the utility model compressive state schematic diagram.

Among the figure by top connection 1,, 2, transition joint, 3, lower contact, 4, lead forms.

The specific embodiment:

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.

As shown in the figure, top connection 1 left end has male joint, in circular cavity is arranged, right-hand member is to have the thin bar of the prominent head of circle to be inserted in transition joint 2 left ends that have the hole oblong slots, top connection is an overall diagram 2 with the thin bar that has the prominent head of circle, among Fig. 3, the thin bar of wherein prominent head in transition joint 2 inner chamber caves slidably, transition joint 2 is a cylinder, its two ends have the hole oblong slots, there is intercommunicating pore the centre, lower contact 3 right-hand members have box and are connected with instrument, in the circular cavity left end is arranged is that the thin bar that has a prominent head of circle is inserted into and has in hole oblong slots transition joint 2 right-hand members, on the sliding point between top connection 1 and the lower contact 2, be connected with lead 4.Described top connection 1, transition joint 2, lower contact 3 all adopt stainless steel material to make.

Claims

1, a kind of controlled double-flexibility pipe nipple of multi-bottom branch borehole logging tool that is used for, it is characterized in that: described controlled double-flexibility pipe nipple is to have the thin bar of the prominent head of circle by top connection (1) one end to be inserted into two ends and to have in the hole elongated slot transition joint (2), and lower contact (3) has prominent thin bar one end of circle and is inserted in the other end of hole circular groove transition joint (2).

2, the controlled double-flexibility pipe nipple of multi-bottom branch borehole logging tool that is used for according to claim 1, it is characterized in that: have lead (4) to connect between described top connection (1), the lower contact (3), its top connection (1), transition joint (2), lower contact (3) all adopt stainless steel material to be made.