CN203285375U - Blocking gauge cutter - Google Patents

Abstract

The utility model discloses a blocking gauge cutter which is suitable for the diameter breaking detection and breaking and scraping operation of oil, gas and water well casing pipes during the processes of the oil field novel well production operation and the production increasing measure operation, can prevent well liquids from overflowing from an oil pipe during the well breaking process to achieve the full-seal construction of a construction well, also can break through any time, and can perform forward and reverse circulation well flushing under an airtight state. The gauge cutter comprises an upper joint and a body which are in threaded connection; a blocker is installed in the body and is in threaded connection with the upper joint; a bearing basket of a liquid flow window is connected below the blocker; the blocker is internally provided with a unidirectional plug. A well liquid is prevented from leaking out from an oil pipe during the process of well breaking by the gauge cutter; full-seal construction operation is achieved; environment-friendly well maintenance for an oil field is realized, and a favorable condition is created for the reclamation of the land of a well field; the operation conditions of a mouth of a well are improved; the labor intensity of workers and the construction hazard are lowered; the operation time and the operation efficiency are improved; an underground pipe column can be subjected to pressure test; a working procedure can be omitted; the production cost is lowered.

Description

A kind of drift size gauge tool that stops up

Technical field

The utility model belongs to the downhole tool that petroleum industry is used, a kind of drift size gauge tool that stops up particularly, the latus rectum to oil, gas, well sleeve pipe of being applicable to bring in a well in operation and well stimulation operation process detects and logically scrapes operation, can prevent that in the drifting process, well liquid overflows from oil pipe, realize the whole enclosed construction of construction well, can get through at any time again, carry out positive and negative circulation well cleanup under air-tight state.

Background technology

Oil field brings in a well or during the well stimulation operation, need latus rectum in sleeve pipe is detected, namely drifting, and by the cutting edge of drift size gauge tool body lower end, strike off internal surface of sleeve pipe residual overlap burr and foreign material, so that the larger-diameter downhole tool such as packer can smooth G.I.H.During the drifting construction, for realizing the requirement of positive and negative bidirectional circulating well-flushing, the drift size gauge tool internal diameter that adopts at present is straight.Owing to being full of mud or other workover fluids in pit shaft,, along with the tubing string G.I.H, there is liquid in a large amount of wells to overflow from well head, cause ground environment to pollute, not only increased control expense, have a negative impact for after land destruction follow-up land reclamation utilization.Tubing string is lowered in process, and the well liquid that overflows ground also can make well head become wet and slippery, and the operation easier of construction increases, and affects the operation timeliness, and then also can bring out the security incident generation.Therefore, scene need to a kind ofly can be stopped up tubing string, be realized totally-enclosed operation, can get through again, in confined conditions, implements the drifting instrument of positive and negative two-way replacement well liquid.

Summary of the invention

The purpose of this utility model is to provide a kind of drift size gauge tool that stops up, and while making the latus rectum of oil field oil, gas, well sleeve pipe can prevent drifting in detecting, well liquid overflows from oil pipe, realizes whole enclosed construction, can get through at any time blanking plug again ,Under air-tight state, carry out positive and negative circulation well cleanup, reduce construction risk, improve the operation timeliness.

The purpose of this utility model is achieved in that a kind of drift size gauge tool that stops up comprises top connection and body, top connection and body screwed connection, blanking plug is loaded in body and the top connection screwed connection, is connected with the basket of accepting of liquid stream window below blanking plug, and one-way plug one is housed in blanking plug.Body is used for leading to, scrape latus rectum in sleeve pipe, and one-way plug one can be used for verifying the sealing performance of down-hole string, saves working procedure, prevents that simultaneously in the process of going into the well, well liquid returns out well head; After getting through blanking plug, accept basket and can be used for accepting the one-way plug one of being hit down, set up positive and negative circulation well cleanup passage.

Compare with present other drift size gauge tool in use, the beneficial effects of the utility model are: 1, avoid drift size gauge tool to go into the well in process, well liquid is scurried out in oil pipe, accomplish the whole enclosed construction operation, realized oil field environmental protection well workover, for reclaiming of soil, well site created good condition.2, improve the well head operating condition, reduced labor strength and construction risk, improved the operation timeliness.3, pressurization can guarantee the sealing of down-hole string to the down-hole string pressure testing before getting through blanking plug, can save flow chart one, obviously reduces production costs.4, the liquid stream window of accepting basket has fettered oil pipe liquid stream, has strengthened and has rushed perverse power, makes better effects if at the bottom of positive flushing manhole.5, top connection is provided with intercommunicating pore, can effectively reduce the drift size gauge tool friction in down stroke, and rinses while constructing, and also can prevent that dirt from causing bit freezing in drift size gauge tool top precipitation.6, instrument can be recycled, and reduces production costs.

Description of drawings

Fig. 1 is structural representation of the present utility model.

The specific embodiment

Describe the utility model in detail below in conjunction with accompanying drawing, referring to Fig. 1, a kind of drift size gauge tool that stops up comprises top connection 1 and body 2, top connection 1 and body 2 screwed connections, blanking plug 3 is loaded in body 2 and top connection 1 screwed connection, what be connected with liquid stream window 8 below blanking plug 3 accepts basket 7, and one-way plug one 4 is housed in blanking plug 3.Blanking plug 3 is cylindrical body and accept basket 7 and be connected by box cupling, its top cylindrical screw thread and top connection 1 screwed connection, and its top inner circle is provided with sealing ring 6 and shoulder, and this shoulder coordinates with the cylindrical shoulder of one-way plug one 4, prevents that in the process of going into the well, one-way plug one 4 is rushed out.One-way plug one 4 bottoms be pyramidal structure, its maximum outside diameter less than the internal diameter of accepting basket 7, be connected by shear pin 5 with blanking plug 3.Accepting basket 7 is tubular bodies, and its underpart is blind pipe 9, and its middle part body is provided with a liquid stream window 8 at least.At least be provided with two intercommunicating pores 10 on the body of top connection 1.

The body 2 that is connected in top connection 1 detects in order to the latus rectum of completing sleeve pipe, and the cutting edge 11 of body 2 lower ends can effectively strike off the residual foreign material of internal surface of sleeve pipe.Blanking plug 3 is connected with top connection 1 by screw thread, and lower end is connected with accepts basket 7, when opening drift size gauge tool, one-way plug one 4 is connected on and accepts in basket 7.Blanking plug 3 with accept basket and 7 can be connected by box cupling, also can change blanking plug 3 and accept shape and the wall thickness dimension of basket 7 junctions, directly use screwed connection.Blanking plug 3 can seal the tubing string inner passage, avoids the interior liquid of well in lower Tubing During Running to scurry out.Accept basket 7 except the one-way plug one 4 in order to accept blanking plug 3, when blanking plug 3 was got through, its liquid stream window 8 more can form unobstructed fluid course simultaneously.

This drift size gauge tool is gone into the well with tubing string, be lowered in process, blanking plug 3 inside that are connected with top connection 1 are equipped with one-way plug one 4 that can be descending and by shear pin 5, are fixed, complete the sealing to tubing string inside, to prevent that in well, liquid is altered from tubing string inside, oil, collar-shaped space are completed by the self-sealing blowout preventer that is arranged on well head, realize totally-enclosed drifting operation.

, down to projected depth, need well-flushing or during for mud, to liquid filling pressure in oil pipe, first complete the checking to the oil pipe sealing performance, and then the rising hydraulic coupling is until cut off the shear pin 5 on the interior one-way plug one 4 of blanking plug 3, and one-way plug one 4 is descending, thereby gets through the well-flushing circulation canal.Fallen into by the one-way plug one 4 of being hit down in the blind pipe 9 of accepting basket 7 bottoms, again rush obstruction well-flushing passage preventing by up liquid stream.If this moment anti-circulation well cleanup, flushing fluid enters in tubing string from accepting basket 7 liquid stream window 8; If direct circulation is rinsed, flushing fluid flows out from the liquid stream window 8 of accepting basket 7, improves the perverse power of rushing.Intercommunicating pore 10 in top connection 1 can effectively reduce go into the well resistance in process of this drift size gauge tool, can prevent that foreign material are deposited in the lock of tool drilling that causes more than drift size gauge tool simultaneously.

Claims (5)

1. one kind can be stopped up drift size gauge tool, comprises top connection and body, and top connection and body screwed connection, is characterized in that, blanking plug is loaded in body and the top connection screwed connection, is connected with the basket of accepting of liquid stream window below blanking plug, and one-way plug one is housed in blanking plug.

2. a kind of drift size gauge tool that stops up according to claim 1, it is characterized in that, described blanking plug is cylindrical body and accept basket and be connected by box cupling, its top cylindrical screw thread and top connection screwed connection, its top inner circle is provided with sealing ring and shoulder, and this shoulder coordinates with the cylindrical shoulder of one-way plug one.

3. a kind of drift size gauge tool that stops up according to claim 1 and 2, is characterized in that, described one-way plug one bottom be pyramidal structure, its maximum outside diameter less than the internal diameter of accepting basket, be connected by shear pin with blanking plug.

4. a kind of drift size gauge tool that stops up according to claim 3, is characterized in that, described to accept basket be tubular body, and its underpart is blind pipe, and its middle part body is provided with liquid stream window at least.

5. a kind of drift size gauge tool that stops up according to claim 1 and 2, is characterized in that, is provided with at least two intercommunicating pores on the body of described top connection.