CN104790938B - Downhole drill bit thrust measurement device - Google Patents
Downhole drill bit thrust measurement device Download PDFInfo
- Publication number
- CN104790938B CN104790938B CN201510194121.9A CN201510194121A CN104790938B CN 104790938 B CN104790938 B CN 104790938B CN 201510194121 A CN201510194121 A CN 201510194121A CN 104790938 B CN104790938 B CN 104790938B
- Authority
- CN
- China
- Prior art keywords
- central tube
- outer barrel
- drill bit
- cover
- oil pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Abstract
The invention discloses a kind of downhole drill bit thrust measurement devices, are connected between brill plug tubing string and drill bit, which includes the central tube with top connection and the outer barrel with lower contact, and central tube is mounted in outer barrel, and top connection is leant out outside outer barrel；Cover, piston and the anti-rotation lock ring for preventing central tube rotation, cover is respectively arranged in the in vivo upper, middle and lower of outer barrel chamber to be slidably connected with outer tube inner wall screwed connection, with central tube；Piston can simultaneously be slided with central tube by screwed connection compared with the inner wall of outer barrel；The confined space that outer barrel, central tube, cover and piston surround forms oil pressure cylinder, and hydraulic oil is housed in the oil pressure cylinder；One electronic pressure gauge is installed on the cover, for measuring the oil pressure in oil pressure cylinder.The downhole drill bit thrust assay device structures of the present invention are simple and convenient to operate, and by the product of the pressure difference that drill bit pressurizes in front and rear oil pressure cylinder and piston annulus area, can obtain the actual thrust at drill bit.
Description
Technical field
The present invention relates to a kind of oil-gas field development downhole tools, measure and fill more particularly, to a kind of downhole drill bit thrust
It puts.
Background technology
It is a kind of common flow chart of underground work to bore bridge plug or cement plug, bores the height of plug efficiency with being added on drill bit
Bit pressure have much relations.The prior art is estimated using the load of well head, hole deviation data, discharge capacity, fluid density at drill bit
Thrust, during actual brill plug, discharge capacity, fluid density are all changing, and coefficient of friction needs to estimate, the temperature in pit shaft
Degree variation also contributes to estimated value, so the actual thrust and estimated value at drill bit have certain error, especially with continuous
When oil pipe bores plug, error bigger, boring plug efficiency to analysis and raising makes troubles.
The content of the invention
The technical problems to be solved by the invention be to provide it is a kind of bore fill in during can accurately obtain pushing away at drill bit
Power, the relation that plug speed and thrust are bored for analysis provide data, to improve the downhole drill bit thrust measurement device for boring plug efficiency.
For this purpose, technical scheme is as follows：
A kind of downhole drill bit thrust measurement device is connected between brill plug tubing string and drill bit, which surveys
Determining device includes the central tube with top connection and outer barrel with lower contact, and the central tube is mounted in outer barrel, it is described on
Connector is leant out outside outer barrel, and central tube and outer barrel can be slided along centerline direction is opposite；
Be respectively arranged in the in vivo upper, middle and lower of outer barrel chamber cover, piston and for prevent it is described in
The anti-rotation lock ring of heart pipe rotation, the cover are slidably connected with outer tube inner wall screwed connection, with central tube；The piston and center
Pipe can simultaneously be slided by screwed connection compared with the inner wall of outer barrel；
The confined space that the outer barrel, central tube, cover and piston surround forms oil pressure cylinder, built-in in the oil pressure cylinder
There is hydraulic oil；
On the cover be equipped with a connecting hole, an electronic pressure gauge through the connecting hole and with cover screwed connection, use
Oil pressure in measurement oil pressure cylinder.Outer barrel top forms pressure gauge room with the cavity that cover surrounds, and can protect electron pressure
Meter.Electronic pressure gauge can record the variation of pressure in real time, the pressure differential and piston ring pressurizeed by drill bit in front and rear oil pressure cylinder
The product of shape area can obtain the actual thrust at drill bit.
The inner peripheral surface of the anti-rotation lock ring is polygon or other non-circular, is formed on the outer wall of the central tube anti-
Twist lock block, the outer circumferential surface of anti-rotation closing piece is adapted with the inner peripheral surface shape of anti-rotation lock ring, and the axial length of anti-rotation closing piece is more than
The thickness of anti-rotation lock ring.
In addition, it is also equipped with anti-fall baffle ring on the outer circumferential surface of the central tube lower port.The anti-fall baffle ring and center
Pipe passes through screwed connection.
Sealing is respectively formed between the cover and outer barrel and central tube, between the piston and outer barrel and central tube.
The downhole drill bit thrust assay device structures of the present invention are simple and convenient to operate, and are pressurizeed front and rear pressure oil by drill bit
The product of pressure difference and piston annulus area in cylinder, can obtain the actual thrust at drill bit.
Description of the drawings
Fig. 1 is the cross-sectional view of the downhole drill bit thrust measurement device of the present invention；
Fig. 2 be in Fig. 1 A-A to cross-sectional view.
In figure：
1. top connection, 2. outer barrels, 3. covers, 4. oil pressure cylinders, 5. pistons, 6. anti-rotation lock rings,
7. anti-rotation closing piece, 8. anti-fall baffle rings, 9. lower contacts, 10. electronic pressure gauges, 11. central tubes,
12. pressure gauge room.
Specific embodiment
The structure of the downhole drill bit thrust measurement device of the present invention is carried out with reference to the accompanying drawings and detailed description detailed
It describes in detail bright.
The downhole drill bit thrust measurement device of the present invention is connected between brill plug tubing string and drill bit.It, should referring to Fig. 1 and Fig. 2
Downhole drill bit thrust measurement device includes the central tube 11 with top connection 1 and the outer barrel 2 with lower contact 9, and central tube 11 is pacified
In outer barrel 2, top connection 1 is leant out outside outer barrel 2.
Cover 3, piston 5 are respectively arranged in the in vivo upper, middle and lower of 2 chamber of outer barrel and for preventing central tube 11
The anti-rotation lock ring 6 of rotation.Cover 3 and 2 inner wall screwed connection of outer barrel simultaneously form sealing, and cover 3 is slidably connected with central tube 11.It is living
For plug 5 with central tube 11 by screwed connection, piston 5 can be free to slide compared with the inner wall of outer barrel 2.Piston 5 and central tube 11 and
Sealant rubber ring is respectively arranged between outer barrel 2.
The confined space that outer barrel 2, central tube 11, cover 3 and piston 5 surround forms oil pressure cylinder 4, in the oil pressure cylinder 4
It is interior that hydraulic oil is housed.On cover 3 be equipped with a connecting hole, electronic pressure gauge 10 through the connecting hole and with 3 screwed connection of cover.
Electronic pressure gauge 10 can record the pressure in oil pressure cylinder 4, pressure differential and the work pressurizeed by drill bit in front and rear oil pressure cylinder
The product of annulus area is filled in, the actual thrust at drill bit can be obtained.
Outer barrel top forms pressure gauge room 12 with the cavity that cover surrounds, and plays a protective role to electronic pressure gauge 10.
Specifically, the inner peripheral surface of anti-rotation lock ring 6 is polygon, is 6 side shapes shown in Fig. 2.The inner peripheral surface of anti-rotation lock ring 6
It can also be other non-circular shapes.Anti-rotation closing piece 7 is formed on the outer wall of central tube 11, the outer circumferential surface of anti-rotation closing piece 7 is with preventing
The inner peripheral surface shape of twist lock ring 6 is adapted, and this structure can ensure that with outer barrel relative rotation, while centering do not occur for central tube
Heart pipe has centralizing function.Further, since central tube 11 can be slided compared with outer barrel 2, so, the axial length of anti-rotation closing piece 7 should
More than the thickness of anti-rotation lock ring 6.
In addition, being also equipped with anti-fall baffle ring 8 on the outer circumferential surface of 11 lower port of central tube, prevent drill bit from surprisingly coming off.
Anti-fall baffle ring 8 passes through screwed connection with central tube 11.
The application method of the measurement device of the present invention is described in detail below：
The measurement device is connected to brill plug tubing string and drill bit or bores between plug tubing string and screw drill.Top connection 1 passes through silk
Plug tubing string is bored on button connection top, and lower contact 9 passes through screwed connection with drill bit or screw drill.Drilling tool is during going into the well, pressure
Pressure in oil cylinder 4 can constantly change, and electronic pressure gauge 10 records the pressure in oil pressure cylinder 4 in real time.Drill bit in place after, start
Before boring plug, drilling tools depth is allowed to remain unchanged, waited 10 minutes or so, and record the time, as the initial point of pressure, then deepened
Drilling tool conventionally starts to bore plug.When boring plug tubing string pressurization, central tube 11 is promoted to move down, piston 5 is with central tube
11 move down, and the pressure in oil pressure cylinder 4 declines at this time, and bit pressure is bigger, and the pressure in oil pressure cylinder 4 is smaller.It was filled in brill
Cheng Zhong, electronic pressure gauge can record the pressure in oil pressure cylinder 4 automatically.After boring plug, keep drilling tools depth constant, wait 10
Minute or more, and the time is recorded, brill plug tubing string is played out afterwards.
To after ground, remove electronic pressure gauge 10, pressure gauge store data readback come out, according to bore plug record when
Between, brill plug pressure process curve is found, the actual thrust for boring plug is converted into using the product of pressure value and piston area.
Claims (4)
1. a kind of downhole drill bit thrust measurement device is connected between brill plug tubing string and drill bit, which is characterized in that bore the underground
Head thrust measurement device includes the central tube (11) with top connection (1) and the outer barrel (2) with lower contact (9), the center
(11) to be managed to be mounted in outer barrel (2), the top connection (1) leans out outer barrel (2) outside,
Cover (3), piston (5) are respectively arranged in the outer barrel (2) in vivo upper, middle and lower of chamber and for preventing
The anti-rotation lock ring (6) of central tube (11) rotation is stated, the cover (3) slides with outer barrel (2) inner wall screwed connection, with central tube (11)
Dynamic connection；The piston (5) can simultaneously be slided with central tube (11) by screwed connection compared with the inner wall of outer barrel (2)；
The confined space that the outer barrel (2), central tube (11), cover (3) and piston (5) surround forms oil pressure cylinder (4), at this
Hydraulic oil is housed in oil pressure cylinder (4)；
A connecting hole is equipped on the cover (3), an electronic pressure gauge (10) connects through the connecting hole and with cover (3) screw thread
It connects, for measuring the oil pressure in oil pressure cylinder (4).
2. downhole drill bit thrust measurement device according to claim 1, it is characterised in that：The anti-rotation lock ring (6) it is interior
Circumferential surface is polygon, is formed with anti-rotation closing piece (7) on the outer wall of the central tube (11), the outer circumferential surface of anti-rotation closing piece (7) with
The inner peripheral surface shape of anti-rotation lock ring (6) is adapted, and the axial length of anti-rotation closing piece (7) is more than the thickness of anti-rotation lock ring (6).
3. downhole drill bit thrust measurement device according to claim 1, it is characterised in that：Central tube (11) lower end
Anti-fall baffle ring (8) is also equipped on the outer circumferential surface of mouth.
4. downhole drill bit thrust measurement device according to claim 3, it is characterised in that：The anti-fall baffle ring (8) is in
Heart pipe (11) passes through screwed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194121.9A CN104790938B (en) | 2015-04-22 | 2015-04-22 | Downhole drill bit thrust measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194121.9A CN104790938B (en) | 2015-04-22 | 2015-04-22 | Downhole drill bit thrust measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104790938A CN104790938A (en) | 2015-07-22 |
| CN104790938B true CN104790938B (en) | 2018-05-29 |
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ID=53556073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510194121.9A Active CN104790938B (en) | 2015-04-22 | 2015-04-22 | Downhole drill bit thrust measurement device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104790938B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482890B (en) * | 2015-08-27 | 2018-12-14 | 北京环鼎科技有限责任公司 | A kind of test method of indirect measuring instrument suffered thrust in a fluid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204571967U (en) * | 2015-04-22 | 2015-08-19 | 中国石油集团渤海钻探工程有限公司 | Downhole drill bit thrust determinator |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4821563A (en) * | 1988-01-15 | 1989-04-18 | Teleco Oilfield Services Inc. | Apparatus for measuring weight, torque and side force on a drill bit |
| US5386724A (en) * | 1993-08-31 | 1995-02-07 | Schlumberger Technology Corporation | Load cells for sensing weight and torque on a drill bit while drilling a well bore |
| CN2761811Y (en) * | 2004-12-29 | 2006-03-01 | 中海石油研究中心 | Measuring device of underwell drill pressure |
| CN201396079Y (en) * | 2009-01-30 | 2010-02-03 | 西部钻探克拉玛依钻井工艺研究院 | Bit pressure measuring pipe nipple for core drilling |
| CN202718669U (en) * | 2012-04-23 | 2013-02-06 | 西南石油大学 | Drill pressure measuring short circuit |
| CN203223217U (en) * | 2013-04-28 | 2013-10-02 | 中国石油集团西部钻探工程有限公司 | Bit pressure testing connector |
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2015
- 2015-04-22 CN CN201510194121.9A patent/CN104790938B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204571967U (en) * | 2015-04-22 | 2015-08-19 | 中国石油集团渤海钻探工程有限公司 | Downhole drill bit thrust determinator |
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| Publication number | Publication date |
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| CN104790938A (en) | 2015-07-22 |
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Effective date of registration: 20210902 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |