CN2545351Y - Counterclockwise drilling tool assembly - Google Patents
Counterclockwise drilling tool assembly Download PDFInfo
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- CN2545351Y CN2545351Y CN 02231576 CN02231576U CN2545351Y CN 2545351 Y CN2545351 Y CN 2545351Y CN 02231576 CN02231576 CN 02231576 CN 02231576 U CN02231576 U CN 02231576U CN 2545351 Y CN2545351 Y CN 2545351Y
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- drilling
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- pendulum
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Abstract
The anti-pendulum drilling assembly of a bottom hole drilling assembly is used for the straightening, vertical and fast drilling of the drilling oil and gas and the structure is characterized in that the bottom hole drilling assembly consists of a bit, a weighted drilling pipe (or a thin drilling collar), a stabilizer, a short heavy drilling collar, a stabilizer and a long heavy drilling collar string from bottom to top. The bottom hole drilling assembly has the deformation feature of an upwardly first cross-arc and a negative drilling angle, and a reducing oblique force, which increases with the increase of the drilling pressure and the functions of the vertical and fast drilling. Compared with the prior conventional hole straightening technique, the anti-pendulum drilling assembly has a better hole straightening effect which is better when the drilling pressure is bigger, unifying the vertical drilling and the fast drilling and effectively improving the well quality and reducing the drilling cost. The present technique can be widely used as a geological drilling, a geothermy drilling and in the occasions which requires the straight and fast drilling of other underground constructions.
Description
Technical field
The relevant a kind of drilling tool that creeps into that is used for soil layer or rock of the utility model is a kind of anti-pendulum assembly specifically.
Background of invention
Drilling engineering is an indispensable engineering in oil and gas exploration, the exploitation.Want to seek buried, and it is exploited out, be unable to do without drilling well at underground petroleum gas.The primary structure pattern of oil gas well is a straight well, accounts for total drilling well mouth number at present
Also have a class well type to be called special wells,, account for the of total drilling well mouth number as directional well, high angle hole, extended reach well, horizontal well or the like.Be straight well or special wells (the straight well section is generally all arranged, and require more strict), all exist and how fast technical problem is beaten directly, beaten to well hole deviation.
Hole deviation can produce a lot of harm, as: the prospect pit hole deviation is crossed conference and is made the geologic information distortion even miss oil-gas Layer; The development well hole deviation seriously can make well off-design well location, upsets the development well pattern of well; In drilling process, cause engineering accident, cause well to be scrapped when serious; Cause the setting of casing difficulty, influence cementing quality; Influence oil extraction operation, or the like.Therefore, solve the problem of tiltedly anti-and well straightening, be a key technical problem that difficulty is very big in the oil/gas drilling engineering always.
Traditional anti-oblique well straightening technology is to prevent tiltedly using the pendulum assembly drop angle with meeting the eye on every side combination.With meeting the eye on every side combination when strengthening the pressure of the drill and creeping into, anti-oblique effect is also bad but in general.When the hole deviation value exceeds standard, often adopt pendulum assembly to carry out drop angle.Because the structure and the mechanical characteristic of pendulum assembly determine that its drop angle power is less, and the influence at the pressure of the drill and drill bit inclination angle has the increasing hole angle effect, therefore can only gently press and hang up and beat, and becomes to exchange for originally wellbore quality with great number with the sacrifice drilling speed.In addition, in deflecting strong stratum and high steep structure stratum, pendulum assembly does not often reach the drop angle effect.
Summary of the invention
The purpose of this utility model is to provide a kind of anti-pendulum assembly, has stronger drop angle characteristic, and the big more drop angle of the pressure of the drill is good more, reaches the effect of deviation prevention and fast.
The purpose of this utility model is to realize like this, a kind of anti-pendulum assembly from drill bit up, is made up of drill bit, flexible drillstem and heavy drill collar, it is characterized in that: be provided with a support at the nearly flexible drillstem end of the hypomere of described heavy drill collar, the below of support forms one section short weight drill string.Described support can be made of stabilizer.Described its flexible drillstem can be by 5 " heavy weight drill pipe, or 5 " drilling rod, or jig drill quickly constitutes.This section flexible drillstem length should be greater than 6m, best about 10m.Described stabilizer is for owing size, and external diameter is than the little 3-5mm of drill bit; The following short weight drill string of stabilizer can be by stub boring quickly, or the lower semisection that joint adds stabilizer forms, and this short weight drill string total length should be greater than 2m, and the best is 3-4m; The above heavy drill collar total length of stabilizer should be greater than 30m.The two ends up and down of flexible drillstem can be connected to drill bit and short weight drill string by transit joint.Can be provided with abrasionproof on this flexible drillstem and protect hoop.Described heavy drill collar can be more than the post, and this weight drill collar is preferably selected grooved drill collar for use.
This new drilling assembly that the utility model proposed---anti-pendulum combination can solve the fast straight problem of beating of beating of oil gas well.It has some opposite but more superior with the pendulum assembly of routine in structure and terms of mechanics, thereby is called anti-pendulum combination.
The deformation characteristic of anti-pendulum combination of the present utility model is shown in Fig. 1 b.Its operating principle is:
After in the well of hole deviation is arranged, being lowered to the combination of anti-pendulum and applying the pressure of the drill P to drill bit, because the heavy drill collar on top lies in down the borehole wall, lean against down borehole wall formation fulcrum as the dimensionally stable device of owing that supports, borehole wall direction is gone up in sensing to the following big rigidity of heavy drill collar Duan Yinqi of stabilizer with short size distortion is less, flexible drillstem under it forms arc because of its rigidity is little, high point causes drill bit to produce negative incidence more than the well center line.According to mechanical analysis, 1. the pressure of the drill P helps drop angle, and the big more effect of its value is good more; 2. the drill bit inclination angle is that negative value also produces the drop angle effect; 3. flexible drillstem is adopted but not heavy drill collar in the bottom; 4. first stride be deformed into arc upwards but not arc downwards.These four aspects are all opposite with traditional pendulum assembly, thereby have stronger drop angle characteristic, and the big more drop angle of the pressure of the drill is good more, can play the effect of deviation prevention and fast.
Description of drawings
Fig. 1 a is a structure principle chart of the present utility model;
Fig. 1 b is a fundamental diagram of the present utility model;
Fig. 2 a is the structure principle chart of first kind of embodiment of the present utility model;
Fig. 2 b is the structure principle chart of second kind of embodiment of the present utility model.
The specific embodiment
The utility model is a kind of anti-pendulum assembly, and shown in Fig. 1 a and Fig. 2 a, the utility model comprises a drill bit 1, which is provided with a flexible drillstem 3, and the lower end of this flexible drillstem 3 can be connected in drill bit 1 by transit joint 2.Flexible drillstem 3 upper ends are provided with one section heavy drill collar 7 at least, stacks again on the heavy drill collar 7.Feature of the present utility model is, is that nearly flexible drillstem end is provided with a support in the lower end of heavy drill collar 7, is formed with the bigger short weight drill string 5 of rigidity at the hypomere of this support, and described flexible drillstem 3 upper ends can be attached thereto by a joint.
In the utility model, the rigidity of this flexible drillstem 3 should be less than the rigidity of the heavy drill collar of upper end, in the present embodiment, can select diameter less than the jig drill of the heavy drill collar in top quickly or " the drilling rod (heavy weight drill pipe) of selecting 5.For guaranteeing flexibility, the length of flexible drillstem should be greater than 6m, and specifically in the present embodiment, the flexible drillstem total length of application is about about 10m.
Support described in the utility model can be made of stabilizer 6, and this stabilizer 6 is for owing the dimensionally stable device.Owing dimensionally stable device 6 should be best than the little 3-5mm of drill bit less than the external diameter of drill bit 1.
The below of described support forms one section short weight drill string 5 that rigidity is bigger.Specifically in the present embodiment, this short weight drill string 5 can be made of a short weight drill collar; Also can form by joint 4 and one section heavy drill collar; Can also add that the lower semisection of stabilizer forms by the short weight drill collar; Perhaps form by the bottom of joint 4 and short weight drill collar and stabilizer 6.The total length of short weight drill string 5 should be 2～3m or 3～4m greater than 1.5m in the present embodiment.
The utility model upper end is provided with one section heavy drill collar 7 at least, the total length of this heavy drill collar 7 should greater than
The utility model upper end is provided with one section heavy drill collar 7 at least, and the total length of this heavy drill collar 7 should be more than or equal to 30m.The optional different size of 7 pairs of different wells of described heavy drill collar, " drill collar is to 12 " above well optional 8 " drill collar generally to 8 " optional 6 of well ", 7.The heavy drill collar 7 of the top of stabilizer 6 can be selected grooved drill collar for use, prevents to produce the differential sticking phenomenon.
In being arranged, the well of hole deviation uses the utility model, after applying the pressure of the drill P for drill bit 1, because the heavy drill collar 7 on top lies in down the borehole wall, as the external diameter of owing dimensionally stable device 6 that supports than drill bit 1 little 3～5mm, lean against down the borehole wall as the stabilizer 6 that supports and form a fulcrum, the heavy drill collar 5 of stabilizer below 6 has bigger rigidity and its size is shorter, so the distortion of this heavy drill collar 5 is less, this heavy drill collar 5 is pointed to go up borehole wall direction, the flexible drillstem 3 of its underpart, as be jig drill quickly, form arc because of its rigidity is little, this arc height point causes drill bit 1 to produce negative incidence more than the center line of well.In application process, deflection is controlled to adjust, make drilling rod not contact the borehole wall.The utlity model has stronger drop angle characteristic, and the big more drop angle of the pressure of the drill is good more, can plays the effect of deviation prevention and fast.
Second kind of embodiment of the present utility model is shown in Fig. 2 b.The structure of present embodiment is identical with embodiment 1 basically, but in the present embodiment, can be provided with abrasionproof and protect hoop 8 on this flexible drillstem 3.The utility model in working order down; the flexible drillstem 3 of its underpart form because of its rigidity is little arc after; this arc height point is more than the center line of well; its arc height point might contact the borehole wall; therefore; this abrasionproof protects hoop 8 and preferably is installed in arc high point, can carry out the abrasionproof protection to drilling rod.
The basic functional principle of present embodiment is consistent with embodiment 1, does not repeat them here.
Claims (10)
1, a kind of anti-pendulum assembly from drill bit up, is made up of drill bit, flexible drillstem and heavy drill collar, and it is characterized in that: be provided with a support at the nearly flexible drillstem end of the hypomere of described heavy drill collar, the below of support forms one section short weight drill string.
2, anti-pendulum assembly according to claim 1 is characterized in that described support can be made of stabilizer.
3, anti-pendulum assembly according to claim 1 is characterized in that described its flexible drillstem can be by 5 " heavy weight drill pipe, or 5 " drilling rod, or jig drill quickly constitutes.
4,, it is characterized in that described its flexible drillstem length should be greater than 6m according to claim 1 or 3 described anti-pendulum assemblies.
5, anti-pendulum assembly according to claim 2 is characterized in that described stabilizer for owing size, and external diameter is than the little 3-5mm of drill bit.
6,, it is characterized in that the following short weight drill string of described stabilizer can be by stub boring quickly, or the lower semisection that joint adds stabilizer is formed according to claim 2 or 5 described anti-pendulum assemblies.
7, according to claim 2 or 5 or 6 described anti-pendulum assemblies, it is characterized in that described short weight drill string total length should be greater than 2m, the best is 3-4m; The above heavy drill collar total length of stabilizer should be more than or equal to 30m.
8,, it is characterized in that the two ends up and down of described flexible drillstem can be connected to drill bit and short weight drill string by transit joint according to claim 1 or 3 described anti-pendulum assemblies.
9,, it is characterized in that to be provided with on the described flexible drillstem abrasionproof and protect hoop according to claim 1 or 3 described anti-pendulum assemblies.
10, anti-pendulum assembly according to claim 1 it is characterized in that described heavy drill collar can be more than the post, and this weight drill collar is preferably grooved drill collar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02231576 CN2545351Y (en) | 2002-04-27 | 2002-04-27 | Counterclockwise drilling tool assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02231576 CN2545351Y (en) | 2002-04-27 | 2002-04-27 | Counterclockwise drilling tool assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2545351Y true CN2545351Y (en) | 2003-04-16 |
Family
ID=33707251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02231576 Expired - Lifetime CN2545351Y (en) | 2002-04-27 | 2002-04-27 | Counterclockwise drilling tool assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2545351Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703695A (en) * | 2017-01-18 | 2017-05-24 | 中国石油大学(华东) | High WOB anti-deviation well straightening drill assembly |
| CN107676042A (en) * | 2017-10-26 | 2018-02-09 | 中国石油集团西部钻探工程有限公司 | Oil drilling three-dimensional horizontal well rigidity drifting BHA |
| CN113513265A (en) * | 2020-04-10 | 2021-10-19 | 中国石油化工股份有限公司 | Rigid-flexible deformation anti-deviation quick drilling tool combination |
-
2002
- 2002-04-27 CN CN 02231576 patent/CN2545351Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703695A (en) * | 2017-01-18 | 2017-05-24 | 中国石油大学(华东) | High WOB anti-deviation well straightening drill assembly |
| CN107676042A (en) * | 2017-10-26 | 2018-02-09 | 中国石油集团西部钻探工程有限公司 | Oil drilling three-dimensional horizontal well rigidity drifting BHA |
| CN113513265A (en) * | 2020-04-10 | 2021-10-19 | 中国石油化工股份有限公司 | Rigid-flexible deformation anti-deviation quick drilling tool combination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM GROUP DRILLING ENGINEERING TECHNO Free format text: FORMER OWNER: INST. OF WELL DRILLING TECHNOLOGY, ACADEMY OF PETROLEUM EXPLORATION AND DEVELOPM Effective date: 20070720 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070720 Address after: 100083 No. 20, Beijing, Xueyuan Road Patentee after: Drilling Engineering Technology Research Institute, China National Petroleum Corp. Address before: 100083 No. 20, Beijing, Xueyuan Road Patentee before: Drilling Technology Int., Research Inst. of Petroleum Exploration Development |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120427 Granted publication date: 20030416 |