CN109236194A - A kind of steel connector titanium alloy drilling rod - Google Patents
A kind of steel connector titanium alloy drilling rod Download PDFInfo
- Publication number
- CN109236194A CN109236194A CN201811235960.0A CN201811235960A CN109236194A CN 109236194 A CN109236194 A CN 109236194A CN 201811235960 A CN201811235960 A CN 201811235960A CN 109236194 A CN109236194 A CN 109236194A
- Authority
- CN
- China
- Prior art keywords
- titanium alloy
- steel
- screw thread
- connector
- drilling rod
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 124
- 239000010959 steel Substances 0.000 title claims abstract description 124
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 114
- 238000005553 drilling Methods 0.000 title claims abstract description 74
- 230000007704 transition Effects 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 12
- 239000012141 concentrate Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000008186 active pharmaceutical agent Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- -1 moreover Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
Abstract
The invention discloses a kind of steel connector titanium alloy drilling rods, the steel connector titanium alloy drilling rod includes titanium alloy drill pipe body and the steel drill rod connector for being threadedly attached in titanium alloy drill pipe body both ends, and the titanium alloy drill pipe body and the steel drill rod connector are interference fitted by hot assembly to be connected.Steel connector titanium alloy drilling rod specific strength of the invention is high, anti-H 2 S stress corrosion performance and resistance to corrosion fatigue are functional, drill string weight can significantly be mitigated, alleviate stress to concentrate, improve maximum depth of setting, the resistance to corrosion fatigue performance etc. of drill string, extend drill string service life, reduces safety accident caused by drilling tool failure in oil/gas well.
Description
Technical field
The present invention relates to drilling rods used in oil-gas exploration and development process, and in particular to a kind of titanium alloy drilling rod, especially
A kind of steel connector titanium alloy drilling rod.
Background technique
With the development of petroleum industry, deep-well, ultradeep well and horizontal well quantity are continuously increased, and exploration and development difficulty increases.
Conventional steel drilling rod specific strength is low, and the stress corrosion fracture that occurs under the conditions of complex working condition oil gas drilling, is let out at fatigue fracture
The failure accidents such as leakage, overload cause great threat to the safety in production of oil/gas well.
Summary of the invention
The purpose of the present invention is to provide a kind of steel connector titanium alloy drilling rods, to solve existing steel drill rod specific strength
It is low, the safety accidents such as stress corrosion fracture, fatigue fracture, leakage, overload easily occur under the conditions of complex working condition oil gas drilling
Problem.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of steel connector titanium alloy drilling rod, the steel connector titanium alloy drilling rod include titanium alloy drill pipe body and pass through screw thread
It is connected to the steel drill rod connector at titanium alloy drill pipe body both ends, the titanium alloy drill pipe body and the steel drill rod connector are logical
Cross hot assembly interference fit connection.
Further, steel drill rod connector include be connected to titanium alloy drill pipe body one end steel male connection and
It is connected to the steel internal screw connector of the titanium alloy drill pipe body other end.
Further, the titanium alloy drill pipe body includes the first thick section and the second thick section for being located at both ends, and
The First Transition section being connect respectively with the first thick section and the second thick section and the second changeover portion, First Transition section and the second transition
Interlude is connected between section.
Further, the outer diameter of the first thick section and the second thick section is equal and is greater than the outer diameter of interlude, and first thickeies
The end of section is equipped with the first external screw thread, and the end of the second thick section is equipped with the second external screw thread, and one end of titanium alloy drill pipe body is logical
It crosses the first external screw thread to connect with steel male connection, the other end is connect by the second external screw thread with steel internal screw connector.
Further, one end of steel male connection is equipped with the first internal screw thread cooperated with the first external screw thread, the other end
Equipped with the third external screw thread being cooperatively connected with steel internal screw connector；
One end of steel internal screw connector is equipped with the second internal screw thread for being cooperatively connected with the second external screw thread, the other end equipped with
The third internal screw thread that steel male connection is cooperatively connected.
Further, third external screw thread and third internal screw thread are API standard drilling tool thread.
Further, the first external screw thread, the second external screw thread, the first internal screw thread and the second internal screw thread are partially trapezoidal spiral shell
Line.
Further, one end and the steel internal screw connector setting second of the first internal screw thread is arranged in steel male connection
One end of internal screw thread, which is equipped with, stablizes conical surface shoulder, titanium alloy drilling rod with the thrust shoulder of titanium alloy drill pipe body cooperation and centering
The end of tube body is equipped with titanium alloy tube body end face and the titanium alloy tube for stablizing the cooperation of conical surface shoulder with thrust shoulder and centering respectively
The body end portion conical surface.
It further, is interference fit after hot assembly between thrust shoulder and titanium alloy tube body end face；Cone is stablized in centering
It is interference fit after hot assembly between face shoulder and the titanium alloy tube body end portion conical surface.
Compared with prior art, the invention has the following beneficial technical effects:
Steel connector titanium alloy drilling rod specific strength height, anti-H 2 S stress corrosion performance and resistance to corrosion fatigue performance of the invention
Well, it can significantly mitigate drill string weight, alleviate stress and concentrate, improve maximum depth of setting, the resistance to corrosion fatigue performance of drill string
Deng extending drill string service life, reduce safety accident caused by drilling tool failure in oil/gas well.
Further, the third external screw thread of steel joint and third internal screw thread use standard API drilling tool thread, can be any
Well section is connect with any common steel drill rod thread, is not necessarily to crossover sub, removes drilling rod elevator apparatus, versatility without changing
Height, anti-Thread-sticking performance is good, improves drilling rod upper shackle number repeatedly, extends the drilling life of drill pipe of titanium alloy and expansion
The application range of titanium alloy drilling rod.
Further, it using partially trapezoidal special thread connection design between steel joint and titanium alloy tube body of the present invention, and adopts
It is assembled under the cooling steel joint heated condition simultaneously of hot assembly, that is, titanium alloy tube body, guarantees that restoring room temperature rear thread in assembly reaches
To interference fit, it ensure that tube body with the intensity for being threadedly coupled part of connector not less than tube body intensity.
Further, (torque) conical surface shoulder is stablized in thrust (torque) shoulder of inventive joint design and centering, improves
The torsional strength and sealing performance of titanium alloy drilling rod have corrosion resistance more higher than steel drill rod, lighter homogeneous tube weight
Amount and higher lower deep ability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of steel connector titanium alloy drilling rod of the invention；
Fig. 2 is the enlarged structure in Fig. 1 at A；
Fig. 3 is the enlarged structure in Fig. 1 at B.
Wherein, 1, third external screw thread；2, steel male connection；31, the first internal screw thread；32, the first external screw thread；4, first
Thick section；5, First Transition section；6, titanium alloy drill pipe body；7, interlude；8, the second changeover portion；9, the second thick section；101,
Second internal screw thread；102, the second external screw thread；11, steel internal screw connector；12, third internal screw thread；A1, thrust shoulder；A2, titanium close
Golden tube body end face；Conical surface shoulder is stablized in B1, centering；B2, the titanium alloy tube body end portion conical surface；100, steel connector titanium alloy drilling rod.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing:
Referring to Fig. 1 to Fig. 3, as shown in Figure 1, steel connector titanium alloy drilling rod 100 of the invention includes: titanium alloy drill pipe body
6 and the steel drill rod connector of titanium alloy drill pipe body end is threadedly attached in (including in steel male connection 2 and steel
Nipple 11).Unlike existing steel drill rod: drill pipe body of the invention is made of titanium alloy, moreover, titanium alloy
Drill pipe body 6 and steel joint are to heat hot assembly under steel joint by cooling titanium alloy tube body to complete, and titanium alloy bores
It is connected through a screw thread, rather than is welded to connect between rod tube body 6 and steel joint.Steel connector titanium alloy drilling rod of the invention is than tradition
Steel drill rod has higher specific strength, corrosion resistance, endurance and high-temperature behavior, greatly improves the lower deep energy of drill string
Power, safety and service life.
Titanium alloy tool joint includes: the steel external screw thread for being threadedly attached in 6 both ends of titanium alloy drill pipe body respectively
Connector 2 and steel internal screw connector 11, i.e. steel connector titanium alloy drilling rod 100 include: titanium alloy drill pipe body 6 and pass through spiral shell respectively
Line is connected to steel male connection 2 and the steel internal screw connector 11 at 6 both ends of titanium alloy drill pipe body, steel male connection
2 are threadedly attached in the bottom end of titanium alloy drill pipe body 6, and steel internal screw connector 11 is threadedly attached in titanium alloy drilling rod
The top of tube body 6.By the way that 6 both ends of titanium alloy drill pipe body are separately connected steel male connection 2 and steel internal screw connector
11, using the titanium alloy drilling rod of steel joint, it can connect in any well section with any common steel drill rod thread, be connect without conversion
Head removes drilling rod elevator apparatus without changing, and versatility is high, and anti-Thread-sticking performance is good, improves drilling rod upper shackle time repeatedly
Number, extends the drilling life of drill pipe of titanium alloy and expands the application range of titanium alloy drilling rod.
Titanium alloy drill pipe body 6 includes: positioned at first thick section 4 at 6 both ends of titanium alloy drill pipe body and the second thick section
9, it is connected to the first thick section 4 and First Transition section 5 and the second changeover portion 8 on the second thick section 9, and be located at titanium alloy and bore
Interlude 7 among rod tube body 6, and interlude 7 is connected between First Transition section 5 and the second changeover portion 8；First thick section 4
Outer diameter that is equal with the outer diameter of the second thick section 9 and being greater than interlude 7, the i.e. wall thickness of the first thick section 4 and the second thick section 9 are big
In the wall thickness of interlude 7, it is respectively equipped on the first thick section 4 and the second thick section 9 and extends to the first thick section 4 and the second thickening
The first external screw thread 32 and the second external screw thread 102 of 9 endfaces of section, titanium alloy drill pipe body 6 pass through first external screw thread 32 at both ends
It is threadedly coupled respectively with steel male connection 2 and steel internal screw connector 11 with the second external screw thread 102.First thick section, 4 He
Second thick section 9 increases the junction of titanium alloy drill pipe body 6 and steel male connection 2 and steel internal screw connector 11
Bonding strength, much larger than the tensile strength for not thickening tube body position (i.e. interlude 7), sealing performance is greater than 35MPa and does not let out
Leakage, the mud pressure (usually less than 20MPa) being far longer than in drilling rod use process, completely adaptation working environment.
Steel male connection 2 is equipped with and the cooperation of titanium alloy drill pipe body 6 company with the connecting pin of titanium alloy drill pipe body 6
The first internal screw thread 31 connect, the first internal screw thread 31 and the first external screw thread 32 are cooperatively connected, the other end of steel male connection 2
(being bottom end in Fig. 1) is equipped with the third external screw thread 1 that connection is matched with steel internal screw connector 11.In use, adjacent
Steel male connection 2 and steel internal screw connector 11 between steel connector titanium alloy drilling rod 100 are mutually threadedly coupled, and are formed and are bored
Roofbolt, this drill string are connected with other drilling tools, from shaft bottom drill bit until derrick drilling rod, form entire drill string.Wherein, drill string
Length account for 90% or more of entire drill string length.Steel internal screw connector 11 is set in the connecting pin with titanium alloy drill pipe body 6
There is the second internal screw thread 101 being cooperatively connected with titanium alloy drill pipe body 6, the second internal screw thread 101 and the cooperation of the first external screw thread 102 connect
It connects, the other end (being top in Fig. 1) of steel internal screw connector 11 is equipped in the third for matching connection with steel male connection 2
Screw thread 12.
It (is turned round as shown in Fig. 2, one end of titanium alloy drill pipe body 6 is equipped with the thrust to match with steel male connection 2
Square) shoulder A1, thrust (torque) shoulder A1 is the shoulder of titanium alloy drill pipe body 6, positioned at root (Fig. 2 of the first external screw thread 32
Middle thrust shoulder A1 is located at the upper end of the first external screw thread 32), for example, thrust (torque) shoulder A1 is positioned at the first external screw thread 32
The cascaded surface of upper end, perpendicular to the axis of titanium alloy drill pipe body 6.Thrust (torque) shoulder A1 is used for and steel male connection
2 cooperations, increase the anti-twisting property and sealability of titanium alloy drill pipe body 6 Yu steel male connection 2.
Stablize as shown in figure 3, one end of titanium alloy drill pipe body 6 is equipped with the centering to match with steel internal screw connector 2
The shoulder that the conical surface (torque) shoulder B1 is titanium alloy drill pipe body 6 is stablized in the conical surface (torque) shoulder B1, centering, is located at titanium alloy and bores
The conical surface (lower end that conical surface shoulder B1 is located at the first external screw thread 32 is stablized in centering in Fig. 3) at rod tube body end portion screw initial thread, example
Such as, it is the conical surface positioned at the lower end of the first external screw thread 32 that the conical surface (torque) shoulder B1 is stablized in centering.The conical surface (torque) is stablized in centering
Shoulder B1 is used for and steel male connection 2 cooperates, and increases the antitorque of titanium alloy drill pipe body 6 and steel male connection 2
Ability, sealability and anti-shackle ability, furthermore ensure that the centring property and Assembly stability of screw thread during hot assembly,
The hot assembly qualification rate of steel connector titanium alloy drilling rod is greatly improved, can be improved efficiency with save the cost.
Third external screw thread 1 and third internal screw thread 12 are the drilling tool thread of standard, as the API drilling tool thread of standard, can be
Any well section is connect with any common steel drill rod thread, is not necessarily to crossover sub, removes drilling rod elevator apparatus without changing, general
Property it is high, anti-Thread-sticking performance is good, improves drilling rod upper shackle number repeatedly, extends the drilling life of drill pipe of titanium alloy and expansion
The big application range of titanium alloy drilling rod.
First external screw thread 32, the second external screw thread 102, the first internal screw thread 31 and the second internal screw thread 101 are buttress thread, are adopted
With partially trapezoidal special thread, increase the tensile strength of threaded connection.
The present invention connects titanium alloy drill pipe body with steel joint, it is necessary to realize the connection, sealing and antitorque function of connector.
Using partially trapezoidal special thread, increase the tensile strength of threaded connection, the design of conical surface shoulder is stablized using thrust shoulder and centering
Can be effectively protected during hot assembly screw thread torque wrench moment and guarantee screw thread to neutrality, improve hot assembly stability, this
Outside, thrust shoulder and the stable conical surface shoulder of centering design the sealing that can effectively improve connector and torsional property and improve and put shackle
Performance, steel connector titanium alloy drilling rod, which can be achieved, in the present invention has good connection, sealing and torsional property.
Titanium alloy tube body of the invention and the threaded connection being threadedly coupled between performance and steel joint between steel joint
Tensile strength, torsional strength, sealing performance of energy etc. not less than with grade of steel steel drill rod, have lighter than conventional steel drilling rod
Quality, higher specific strength, the preferably performances such as corrosion-resistant endurance, significantly mitigate whole drill string weight, alleviate stress and concentrate,
The advantages that improving the maximum depth of setting of drill string and extending drill string service life.It is low mainly to solve conventional steel drilling rod specific strength,
The problem of failure such as stress corrosion fracture, fatigue fracture, leakage, overload easily occurs under the conditions of complex working condition oil gas drilling.
Steel connector titanium alloy drilling rod manufacturing process of the invention is as follows:
Titanium alloy drill pipe body 6 makes titanium alloy drilling rod by titanium sponge vacuum melting, rolling, extruding (or upset) mode
Tube body 6 has interlude 7 and makes the first thick section 4 and the second thick section 9 of 6 end of titanium alloy drill pipe body formation certain length
And First Transition section 5 and the second changeover portion 8, processing has the inclined of high bonding strength on the first thick section 4 and the second thick section 9
Trapezoidal special external screw thread.
Steel drill rod connector (including steel male connection 2 and steel internal screw connector 11) is fast using precision die forging mode
Rapid-result type, connector one end be processed into match with the first external screw thread 32 of titanium alloy drill pipe body 6, the second external screw thread 102 it is inclined
Trapezoidal special first internal screw thread 31, the second internal screw thread 101, the other end are processed into spiral shell outside the third with API standard drilling tool thread
Line 1 or third internal screw thread 12.
Steel male connection 2 and steel internal screw connector 11 are connected using the method and titanium alloy drill pipe body 6 of hot assembly
It is connected into as an entirety, i.e. injection cooling medium protects titanium alloy drill pipe body 6, heats in steel male connection 2 and steel
Nipple 11 carries out upper button by torque system after heat preservation and connects, and forms steel connector titanium alloy drilling rod overall structure after cooling.
In order to improve the anti-twisting property and sealability of tube body and connector, titanium alloy drill pipe body 6 and steel joint connection
Locate screw thread using thrust shoulder and stablizes the stable conical surface shoulder structure design of centering, after hot assembly connection cooling, end
Thrust shoulder and centering stablize conical surface shoulder and are in interference fit state, and foring connection structure is disposable connection, make
With that can not dismantle in the process, structure design is for guaranteeing that being threadedly coupled intensity and prevention shackle plays important function.
Steel connector titanium alloy drilling rod 100 connects to form drilling rod by the API drilling tool thread at steel joint both ends in use
Column.
Analysis the result shows that, steel connector titanium alloy drilling rod of the invention, the screw thread of titanium alloy drill pipe body and steel joint
Bonding strength is greater than the tensile strength for not thickening tube body position, and sealing performance is greater than 35MPa and does not leak, and is far longer than drilling rod
Mud pressure (usually less than 20MPa) in use process.The torsional strength in kind of steel connector titanium alloy drilling rod, tensile strength and
Sealing performance is all satisfied the rapid drilling performance requirement of deep-well, ultradeep well and horizontal well.
Claims (9)
1. a kind of steel connector titanium alloy drilling rod, which is characterized in that the steel connector titanium alloy drilling rod (100) includes titanium alloy drilling rod
Tube body (6) and the steel drill rod connector for being threadedly attached in titanium alloy drill pipe body (6) both ends, the titanium alloy drill pipe body
(6) it is interference fitted and is connected by hot assembly with the steel drill rod connector.
2. a kind of steel connector titanium alloy drilling rod according to claim 1, which is characterized in that steel drill rod connector includes connection
Titanium alloy drill pipe body (6) one end steel male connection (2) and be connected to titanium alloy drill pipe body (6) other end
Steel internal screw connector (11).
3. a kind of steel connector titanium alloy drilling rod according to claim 2, which is characterized in that the titanium alloy drill pipe body
It (6) include adding positioned at first thick section (4) and the second thick section (9) at both ends, and respectively with the first thick section (4) and second
The First Transition section (5) and the second changeover portion (8) of thick section (9) connection, connect between First Transition section (5) and the second changeover portion (8)
It is connected to interlude (7).
4. a kind of steel connector titanium alloy drilling rod according to claim 3, which is characterized in that the first thick section (4) and second
The outer diameter of thick section (9) is equal and is greater than the outer diameter of interlude (7), and the end of the first thick section (4) is equipped with the first external screw thread
(32), the end of the second thick section (9) is equipped with the second external screw thread (102), and one end of titanium alloy drill pipe body (6) passes through outside first
Screw thread (32) is connect with steel male connection (2), and the other end passes through the second external screw thread (102) and steel internal screw connector (11)
Connection.
5. a kind of steel connector titanium alloy drilling rod according to claim 4, which is characterized in that steel male connection (2)
One end is equipped with the first internal screw thread (31) cooperated with the first external screw thread (32), and the other end is equipped with matches with steel internal screw connector (11)
Close the third external screw thread (1) of connection；
One end of steel internal screw connector (11) is equipped with the second internal screw thread (101) being cooperatively connected with the second external screw thread (102), separately
One end is equipped with the third internal screw thread (12) being cooperatively connected with steel male connection (2).
6. a kind of steel connector titanium alloy drilling rod according to claim 5, which is characterized in that third external screw thread (1) and third
Internal screw thread (12) is API standard drilling tool thread.
7. a kind of steel connector titanium alloy drilling rod according to claim 5, which is characterized in that the first external screw thread (32), second
External screw thread (102), the first internal screw thread (31) and the second internal screw thread (101) are buttress thread.
8. a kind of steel connector titanium alloy drilling rod according to claim 5, which is characterized in that steel male connection (2) is set
Set the first internal screw thread (31) one end and steel internal screw connector (11) setting the second internal screw thread (101) one end be equipped with
Conical surface shoulder (B1) is stablized in the thrust shoulder (A1) of titanium alloy drill pipe body (6) cooperation and centering, titanium alloy drill pipe body (6)
End is equipped with titanium alloy tube body end face (A2) and the titanium for stablizing conical surface shoulder (B1) cooperation with thrust shoulder (A1) and centering respectively
The alloy tube end portion conical surface (B2).
9. a kind of steel connector titanium alloy drilling rod according to claim 8, which is characterized in that thrust shoulder (A1) and titanium alloy
It is interference fit after hot assembly between tube body end face (A2)；Conical surface shoulder (B1) and the titanium alloy tube body end portion conical surface are stablized in centering
It (B2) is interference fit after hot assembly between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811235960.0A CN109236194A (en) | 2018-10-22 | 2018-10-22 | A kind of steel connector titanium alloy drilling rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811235960.0A CN109236194A (en) | 2018-10-22 | 2018-10-22 | A kind of steel connector titanium alloy drilling rod |
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| CN109236194A true CN109236194A (en) | 2019-01-18 |
Family
ID=65081316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811235960.0A Pending CN109236194A (en) | 2018-10-22 | 2018-10-22 | A kind of steel connector titanium alloy drilling rod |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413810A (en) * | 2018-06-08 | 2018-08-17 | 杨凡 | It draws guns soon set |
| CN112096303A (en) * | 2020-09-28 | 2020-12-18 | 西南石油大学 | Heat-insulating drill rod for cooling high-temperature well shaft and preparation method thereof |
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