CN205100922U

CN205100922U - Coring bit fisher

Info

Publication number: CN205100922U
Application number: CN201520916579.6U
Authority: CN
Inventors: 张�杰; 卓云; 景洋; 胡诚; 李高文
Original assignee: Chuandong Drilling Co of CNPC Chuanqing Drilling Engineering Co Ltd
Current assignee: Chuandong Drilling Co of CNPC Chuanqing Drilling Engineering Co Ltd
Priority date: 2015-11-17
Filing date: 2015-11-17
Publication date: 2016-03-23
Anticipated expiration: 2025-11-17

Abstract

The utility model provides a coring bit fisher, including the tubular column, its characterized in that: the upper portion of this tubular column sets up tool joint, and the middle part outer wall of tubular column has little big tapering down, and the middle part outer wall is provided with the salvage screw thread, the lower part of tubular column is for rightting the body, the outer wall that should right the body has little big tapering down, the bottom of tubular column is provided with the cutting teeth, the center of tubular column is provided with the runner along the vertical direction, and this runner link up the bottom of tubular column from tool joint's bottom, the utility model discloses coring bit fisher can clear up sand setting in the drill bit hydrophthalmia fast, fall the piece, rights drill bit prevent tilting simultaneously, salvages that the screw thread is compromise the make -up, is repaiied the knot, the thread making function, repaiies, thread making speed is very fast, inside big runner reduces circulation pumping pressure, effectual protection rock core simultaneously, the utility model discloses intensity is big, can cooperate bumper jar jarring unfreezing for the crash handling progress reduce accident loss, but the wide application is in oil, natural gas field.

Description

Coring bit fisher

Technical field

The utility model relates to fisher, is specifically related to coring bit fisher.

Background technology

In petroleum drilling engineering, in order to grasp the firsthand information on stratum, for the exploitation in later stage, well stimulation lay the foundation, but occur in coring process complexity even bit freezing, the coring bit situation such as to drop occur, coring bit drops the salvaging after well, is adopt the mode of milling to carry out always, adopt machining tool external diameter slightly larger than coring bit internal diameter once in a while, mode that is swollen, card of pressurizeing is salvaged, but in trip-out midway, second time occurs and to fall well, causing trouble complicated.

The well that falls for coring bit is salvaged, and adopts junk mill milling but gets core stratum often pores'growth is good, drilling speed is fast, milling is difficult, the data that our geology is rare especially, is the integrality ensureing data, has strict regulation to the rock core length of loss; Adopt mode that is swollen, card to salvage the probability that generation drops for the 2nd time very large, considerably increase coring bit and to fall the difficulty of well troubleshooting and breakdown loss.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of coring bit fisher.

In order to solve the problem, according to the technical solution of the utility model, coring bit fisher, comprise tubing string, it is characterized in that: the top of this tubing string arranges tool joint, the middle part outer wall of tubing string has lower little large tapering, and middle part outer wall is provided with salvaging screw thread; The bottom of tubing string is centralizer body; The outer wall of this centralizer body has lower little large tapering; The bottom of tubing string is provided with cutting teeth; The center of tubing string is vertically provided with runner, and this runner penetrates into the bottom of tubing string from the bottom of tool joint.

The beneficial effect of coring bit fisher described in the utility model is: the utility model coring bit fisher can be cleared up sand setting in bit port fast, fall block, the drill bit of righting simultaneously prevents from, salvage that screw thread is taken into account make-up, repaiied button, thread making function, repair, thread making speed; Inner large runner reduces circulation pump pressure, effectively protects rock core simultaneously; The utility model intensity is large, can coordinate bumper jar jarring releasing, accelerates accident treatment progress, reduces causality loss, can be widely used in oil, natural gas field.

Accompanying drawing explanation

Fig. 1 is the structural representation of the coring bit fisher described in this.

Detailed description of the invention

See Fig. 1, coring bit fisher, comprises tubing string, it is characterized in that: the top of this tubing string arranges tool joint 1, and the middle part outer wall of tubing string has lower little large tapering, and middle part outer wall is provided with salvaging screw thread 2; The bottom of tubing string is centralizer body 3; The outer wall of this centralizer body 3 has lower little large tapering; The bottom of tubing string is provided with cutting teeth 4; The center of tubing string is vertically provided with runner 5, and this runner 5 penetrates into the bottom of tubing string from the bottom of tool joint 1.

The utility model adopts make-up, the way of thread making is salvaged, and accelerates the process progress of fault, reduces breakdown loss.During concrete use, fisher is connected to drilling tool bottom, under enter to adjusting milling parameter during top of fish, note observing bottom fisher and whether enter bit port, after after entering bit port bottom fisher, pump pressure slightly changes, enters bit port bottom fisher, sand setting in slow rotation drilling tool cleaning drill bit, while rotation sand removal, centralizer body 3 righting drill bit on fisher prevents from, and salvages when screw thread 2 contacts drill bit screw thread and repaiies button, thread making; Continue slow sand removal thread making, when rock core enters fisher runner 5, pump pressure raises obviously, and TORQ raises and even rotates difficulty, and this stops rotating disk, carries drilling tool and pull out of hole slowly; If coring bit clamps, then up and down unfreezing, even coordinate bumper jar jarring releasing.

Claims

1. coring bit fisher, comprises tubing string, it is characterized in that: the top of this tubing string arranges tool joint (1), and the middle part outer wall of tubing string has lower little large tapering, and middle part outer wall is provided with salvaging screw thread (2); The bottom of tubing string is centralizer body (3); The outer wall of this centralizer body (3) has lower little large tapering; The bottom of tubing string is provided with cutting teeth (4); The center of tubing string is vertically provided with runner (5), and this runner (5) penetrates into the bottom of tubing string from the bottom of tool joint (1).