Two-opening one-time-drilling drilling tool combination suitable for oil well horizontal well construction and construction method thereof

A construction method and drilling tool assembly technology, which are applied in drilling equipment and methods, wellbore/well components, and automatic drilling control systems, etc. It can improve the sand-carrying property and lubricity, reduce the number of trajectory adjustments, and shorten the construction time.

Inactive Publication Date: 2020-07-10
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous increase of the number of horizontal wells and the length of the horizontal section, there are long target distances and large offset distances in vertical wells or deviation correction sections during construction, and the well deviation is easy to exceed the standard. It is difficult to control the deviation correction trajectory, and it is difficult to carry sand. Severe back pressure; poor drillability in lower formations; low composite build-up rate of the PDC bit in the deviated well section, sliding is easy to stick to the back pressure; Yanchang 6 group mudstone section and Yanchang 7 group oil shale are prone to collapse; the wellbore trajectory adjustment in the horizontal section is frequent , during the construction process, the frictional torque was relatively large, which made it impossible to complete a drill

Method used

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  • Two-opening one-time-drilling drilling tool combination suitable for oil well horizontal well construction and construction method thereof
  • Two-opening one-time-drilling drilling tool combination suitable for oil well horizontal well construction and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] refer to figure 1 , is a structural schematic diagram of Embodiment 1 of the present invention, a two-run one-trip drilling tool assembly suitable for oil well and horizontal well construction, including a low-end drill bit 1, a screw rod 2, a back pressure valve 3, and a wireless directional joint while drilling 4. Non-magnetic drill collar 5, first weighted drill pipe 6, hydraulic oscillator 7, second weighted drill pipe 8 and drill pipe 9 at the top. Er 3. Wireless directional joint while drilling 4, non-magnetic drill collar 5, first heavy drill pipe 6 connected in turn, hydraulic oscillator 7, second heavy drill pipe 8 and top drill pipe 9 are suitable for horizontal well construction in oil wells Two open trips to drill the BHA.

[0028] In actual use: the low-end drill bit 1 is sequentially connected to the screw rod 2, the back pressure valve 3, the wireless directional joint while drilling 4, the non-magnetic drill collar 5, the first heavy drill pipe 6 is con...

Embodiment 2

[0033] Compared with Embodiment 1, the difference of this embodiment is that: the first heavy drill rod 6, the second heavy drill rod 8 and the drill rod 9 are all heavy drills with a button type of 411X 410 and a diameter of Φ127mm The first heavy drill rod 6 is composed of 9 heavy drill rods with a button type of 411X 410 and a diameter of Φ127mm, and the second heavy drill rod 8 is composed of 30-36 heavy drill rods with a button shape of 411X 410 and a diameter of Φ127mm Rod composition.

[0034] Preferably, the second heavy drill rod 8 is composed of 33 heavy drill rods with a button shape of 411X 410 and a diameter of Φ127mm.

[0035] In actual use: the first heavy drill pipe 6, the second heavy drill pipe 8 and the drill pipe 9 are all heavy drill pipes with a button type of 411X 410 and a diameter of Φ127mm, which are convenient to connect with the hydraulic oscillator 7 and the drill pipe 9. A heavy drill pipe 6 is composed of 9 heavy drill pipes with button type of ...

Embodiment 3

[0039]Compared with Example 1, the difference of this example is that the drill bit 1 is a 6-blade 16mm composite sheet long-gauge double-row special-shaped tooth PDC drill bit, and the button type of the drill bit 1 is a 431PDC drill bit with a diameter of Φ215mm. .9mm.

[0040] In actual use: Drill bit 1 is a 6-blade 16mm composite long-gauge double-row special-shaped tooth PDC drill bit. The buckle type of drill bit 1 is 431PDC drill bit with a diameter of Φ215.9mm. It has strong aggressiveness and good wear resistance. High speed, compared with the conventional 5-blade 19mm composite PDC drill bit, the force on the blade is uniform, the sliding drilling tool surface is more stable, the sliding drilling efficiency is higher, the wear resistance is strong, and the drilling footage is increased, which can ensure fast and safe drilling The completion of the second drilling trip of the horizontal well of the oil well.

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Abstract

The invention relates to the field of petroleum exploration and development, and particularly relates to a two-opening one-time-drilling drilling tool combination suitable for oil well horizontal wellconstruction and a construction method thereof. When an inclined well section is implemented, the drilling pressure, the rotating speed and the displacement of the two-opening one-time-drilling drilling tool combination are controlled to control the power of a screw rod, the sand carrying performance and the lubricating performance of a drilling fluid system are improved, sticking, clamping and supporting pressure are solved, and the mechanical drilling speed of the inclined well section can be obviously increased. In the actual application process, on one hand, the inclination is adjusted and increased through sliding drilling; and on the other hand, the composite inclination increasing characteristic of the drilling tool combination is fully utilized, the track adjusting frequency is reduced, and the construction time of the inclined well section can be obviously shortened. According to the drilling tool combination, only one centralizer exists on the screw rod 2, the number of fulcrums is small, the friction resistance in the sliding drilling process can be obviously reduced, the problems of sticking, clamping and supporting pressure are solved, and the mechanical drilling speed of the inclined well section is increased.

Description

technical field [0001] The invention relates to the field of petroleum exploration and development, in particular to a drilling tool assembly suitable for oil well and horizontal well construction and a construction method thereof. Background technique [0002] Horizontal well development has become the main method for large-scale development of oil and gas fields in the Ordos Basin. With the continuous increase of the number of horizontal wells and the length of the horizontal section, there are long target distances and large offset distances in vertical wells or deviation correction sections during construction, and the well deviation is easy to exceed the standard. It is difficult to control the deviation correction trajectory, and it is difficult to carry sand. Severe back pressure; poor drillability in lower formations; low composite build-up rate of the PDC bit in the deviated well section, sliding is easy to stick to the back pressure; Yanchang 6 group mudstone secti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/00E21B17/10E21B7/04E21B44/00E21B28/00
CPCE21B7/046E21B17/00E21B17/1078E21B28/00E21B44/00
Inventor 张延兵欧勇陈敏杰喻小松袁立志南红军王登治张建龙王世斌焦卫江王浩焦武山黄西王延山焦同建
Owner BC P INC CHINA NAT PETROLEUM CORP
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