CN202073519U

CN202073519U - High-efficiency tool for restoring dislocated and broken sleeve

Info

Publication number: CN202073519U
Application number: CN2011201194487U
Authority: CN
Inventors: 陈竹; 饶岩岩; 姚志; 樊文生
Original assignee: BEIJING SINOPETROLEUM TECHNOLOGY Inc
Current assignee: BEIJING SINOPETROLEUM TECHNOLOGY Inc
Priority date: 2011-04-21
Filing date: 2011-04-21
Publication date: 2011-12-14
Anticipated expiration: 2021-04-21

Abstract

The utility model relates to an underground working tool, in particular to a high-efficiency tool for restoring a dislocated and broken sleeve. The tool comprises a cone mill bit, wherein the cone mill bit is replaced with a primer milling shoe; the primer milling shoe comprises a drill rod connector, a lengthened primer, a water trough, a sleeve restoring cutting tooth and a gauge part; the drill rod connector is arranged at one end of the primer milling shoe; the columnar gauge part is arranged at the middle part of the primer milling shoe; the lengthened primer is arranged at the other end of the primer milling shoe; the sleeve restoring cutting tooth is arranged in the axial direction of the gauge part and near the end surface of one end of the lengthened primer; the water trough is arranged on the gauge part; and the sleeve restoring cutting tooth is formed by inlaying natural diamond granules. The diamond milling shoe with the lengthened primer is used to restore the dislocated and broken sleeve, so that the underground work is steady, the torque is relatively small, breakage of a drilling tool is avoided, the restoring (milling) speed is high, the restoring efficiency is high, and the restoring success rate after dislocation and breakage of the sleeve is high.

Description

A kind of efficient tool of repairing casing bad break

Technical field:

The utility model relates to the underground work instrument, relates more specifically to a kind of efficient tool of repairing casing bad break.

Background technology:

The oil gas well is the same with the people, and the life-span arrived to a certain degree and all can wear out because of various factors (as: dielectric corrosion, well workover and high-voltage construction etc.), sick.Sleeve pipe is the skeleton of oil gas well, is the machine of oil gas well.Sleeve pipe damages, being called for short cover decreases, cover decreases and comprises: distortion and bad break, bad break is a kind of serious phenomenon that cover decreases, and shows that mainly sleeve pipe screwed connection position goes wrong, and deviation appears in the concentricity of two sleeve pipes up and down, cause normally to remove into the well operations instrument, simultaneously, generally be attended by leakage, the oil gas well that the sleeve pipe bad break therefore occurs generally all can't ordinary production.

Interiorly in oil field middle-deep well and the shallow well, grope through practice for many years, the sleeve pipe bad break has milling tool (milling awl, junk mill) milling method, stopper to set upright methods such as squeeze method usually, but applicable elements is all very harsh: milling tool (milling awl, junk mill) milling method: only be applicable to that wrong section jacket exterior has cement, at the bad break well that milling process middle sleeve can not be swung, milling efficient is not high; Stopper is set upright the squeeze method method: only be applicable to the jacket exterior cement-free and rock very big wrong section well, success rate also not high (can the stopper external diameter be selected very important, arrive the desired depth position smoothly down, and can squeeze method take effect all is unknown number); Allowance law: fire subsidy and metal expansion pipe subsidy etc., only be applicable to that cased perforated, casing inner diameter do not have significant change, be not suitable for casing deformation and bad break (after the perforation of DH1-6-7 sleeve pipe many places, Tarim Basin in 2004, utilizing external metal expansion pipe subsidy technology, result's failure).For deep-well jacket exterior cement-free and rock little bad break well, also there are not better instrument and data to inquire about at present, especially in the oil field, Tarim Basin, almost can use for reference without any experience.

The utility model content:

The purpose of this utility model provides a kind of efficient tool of repairing casing bad break, repairs the bad break sleeve pipe with lengthening introduction diamond junk mill, and underground work is steady, moment of torsion is less, fracture accident do not occur, and milling speed is very fast, the remediation efficiency height, the reparation success rate height behind the sleeve pipe bad break.

For achieving the above object, the utility model is by the following technical solutions:

The efficient tool of a kind of repairing casing bad break that the utility model provides, comprise and mill awl, the described awl that mills is replaced with the introduction junk mill, described introduction junk mill comprises tool joint, lengthening introduction, chip removal tank, repaiies the cover cutting teeth and protects the position, footpath, one end of described introduction junk mill is tool joint, the middle part is position, columniform guarantor footpath, and the other end is provided with the lengthening introduction; The end face of close lengthening introduction one end is provided with and repaiies the cover cutting teeth on the axial direction at position, described guarantor footpath, and position, described guarantor footpath is provided with the chip removal tank; Described repair the cover cutting teeth by particle studded composition of natural diamond.

In the efficient tool technical scheme of another preferred a kind of repairing casing bad break that the utility model provides, described lengthening introduction is cylindrical, with the other end screwed connection of described introduction junk mill.

In the efficient tool technical scheme of the preferred a kind of repairing casing bad break again that the utility model provides, position, described guarantor footpath is provided with at least one chip removal tank.

In the efficient tool technical scheme of another preferred a kind of repairing casing bad break that the utility model provides, position, described guarantor footpath is provided with three chip removal tanks, the Inlet and outlet water direction of described chip removal tank is consistent with position, described guarantor footpath axis direction, and described chip removal tank is that the center evenly distributes to protect axle center, position, footpath.

In the efficient tool technical scheme of another preferred a kind of repairing casing bad break that the utility model provides, be communicated with by the circulation hydrophthalmia between the described chip removal tank.

Because the beneficial effect that has adopted technique scheme, the utility model to obtain is:

1, the introduction junk mill being used for the sleeve pipe of milling bad break, though be not the thing that ordinary person thought, is feasible, has opened up new purposes, has widened the purposes space.

2, cutting teeth was carbide alloy in the past, and we make the natural diamond particle into, and tooth hardness has increased, and the anti-wear performance in cutting face and efficient also just are improved significantly.

3, having done local improvement on tool sizes (mainly be to protect the position, footpath tooth is also arranged, and conventional introduction junk mill does not have outstanding tooth to protect the footpath, is easy to undergauge during milling work; Introduction has extended, all right jointed rod in lower end or oil pipe, this has just strengthened the guide function placed in the middle of introduction, avoids the milling track deviation to occur).

4, repair the bad break sleeve pipe with lengthening introduction diamond junk mill, underground work is steady, and moment of torsion is less, fracture accident do not occur, milling speed very fast (average 8 hours just can repair a bad break face), and also three bad break faces just consume 1 new tool.

Description of drawings

Fig. 1 is a kind of efficient tool structural representation of repairing casing bad break;

Fig. 2 overlaps cutting teeth place schematic cross-section for a kind of repairing of efficient tool of repairing casing bad break;

Wherein, the 1-tool joint, 2-protects the position, footpath, the 3-introduction that extends, 4-repaiies the cover cutting teeth, 5-chip removal tank.

The specific embodiment

Below in conjunction with embodiment utility model is described in further detail.

Embodiment 1:

Shown in Fig. 1-2, the efficient tool of a kind of repairing casing bad break of this routine utility model, comprise and mill awl, mill awl and replace with the introduction junk mill, the introduction junk mill comprises tool joint 1, lengthening introduction 3, chip removal tank 5, repaiies cover cutting teeth 4 and protects position 2, footpath, and an end of introduction junk mill is tool joint 1, the middle part is position 2, columniform guarantor footpath, the other end is provided with lengthening introduction 3, and lengthening introduction 3 is cylindrical, with the other end screwed connection of described introduction junk mill; The end face of close lengthening introduction 3 one ends is provided with and repaiies cover cutting teeth 4 on the axial direction at position 2, guarantor footpath, protect position 2, footpath and be provided with at least one chip removal tank 5, preferred three of this example, the Inlet and outlet water direction of chip removal tank 5 is consistent with position, guarantor footpath 2 axis directions, chip removal tank 5 is that the center evenly distributes to protect 2 axle center, position, footpath, is communicated with by the circulation hydrophthalmia between the chip removal tank 5; Repair the cover cutting teeth 4 by particle studded composition of natural diamond.

Wherein repairing cover cutting teeth 4 is a kind of cutting teeths that are used for repairing casing, is arranged on the end face of close lengthening introduction 3 one ends on the axial direction of protecting position 2, footpath.

In underground work field of tool of today, the introduction junk mill is mainly used in the milling environment that packer, tubing (oil pipe, drilling tool etc.) have the hydrophthalmia fish, does not have the milling of introduction to occur eccentric wear easily.But, at the particular surroundings of sleeve pipe bad break, to conventional introduction junk mill by carry out should the repairing casing bad break after the technological improvement.

In February, 2011, oil field, Tarim Basin wheel Nan3-2-9Jing, the finishing drilling well depth was 4975 meters in 92 years, 19 years present life-spans of this well, it is the old well of a bite, serious because of casing corrosion, in squeeze method and workover treatment, in 7 " paroxysmal bad break appears in sleeve pipe; bad break face one has 8 places (bad break well section is between 2942-3200 rice); the bad break face is all 95/8 ", the cover tube outside does not have cement, so sleeve pipe rocks not quite.

Repair the cover initial stage, we are by playing lead stamp, and impression shows the sleeve pipe bad break; Attempt for the first time being lowered to the 150mm extended type and mill awl (import instrument) and repair cover, effect is very undesirable, and because moment of torsion is excessive, tubing string is sprained and jumped seriously, causes tubing string fracture accident to occur once; Be lowered to the 150mm weak point once more and mill awl (import instrument), do not have what improvement; Preceding two are milled awl and have only repaired a bad break face (one of topmost), 4 days consuming time.But, by being lowered to two 145mm lengthening introduction diamond junk mill of the present utility model, repairs 7 bad break faces, 4 days consuming time altogether, well had 8 sleeve pipe bad break faces entirely, by use novel repair the cover instrument after, efficient is greatly improved, the client is very satisfied.

Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to the foregoing description, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of this claim scope.

Claims

1. the efficient tool of a repairing casing bad break, comprise and mill awl, it is characterized in that: the described awl that mills is replaced with the introduction junk mill, described introduction junk mill comprises tool joint (1), lengthening introduction (3), chip removal tank (5), repaiies cover cutting teeth (4) and protects position (2), footpath, one end of described introduction junk mill is tool joint (1), the middle part is position (2), columniform guarantor footpath, and the other end is provided with lengthening introduction (3); The end face of close lengthening introduction (3) one ends is provided with and repaiies cover cutting teeth (4) on the axial direction at described guarantor position, footpath (2), and described guarantor directly position (2) is provided with chip removal tank (5); Described repair the cover cutting teeth (4) by particle studded composition of natural diamond.

2. the efficient tool of a kind of repairing casing bad break as claimed in claim 1 is characterized in that: described lengthening introduction (3) is for cylindrical, with the other end screwed connection of described introduction junk mill.

3. the efficient tool of a kind of repairing casing bad break as claimed in claim 1 is characterized in that: described guarantor position, footpath (2) is provided with at least one chip removal tank (5).

4. the efficient tool of a kind of repairing casing bad break as claimed in claim 3, it is characterized in that: described guarantor position, footpath (2) is provided with three chip removal tanks (5), the Inlet and outlet water direction of described chip removal tank (5) is consistent with position (2), described guarantor footpath axis direction, and described chip removal tank (5) is that the center evenly distributes to protect axle center, position (2), footpath.

5. the efficient tool of a kind of repairing casing bad break as claimed in claim 4 is characterized in that: be communicated with by the circulation hydrophthalmia between the described chip removal tank (5).